Larval phase hi-res stock photography and images

Homarus capensis, Print, The Cape lobster, Homarinus capensis, is a species of small lobster that lives off the coast of South Africa, from Dassen Island to Haga Haga. Only a few dozen specimens are known, mostly regurgitated by reef-dwelling fish. It lives in rocky reefs, and is thought to lay large eggs that have a short larval phase, or that hatch directly as a juvenile. The species grows to a total length of 10 cm (3.9 in), and resembles a small European or American lobster; it was previously included in the same genus, Homarus, although it is not very closely related to those species, and Stock Photo

RM2A2MT5A–Homarus capensis, Print, The Cape lobster, Homarinus capensis, is a species of small lobster that lives off the coast of South Africa, from Dassen Island to Haga Haga. Only a few dozen specimens are known, mostly regurgitated by reef-dwelling fish. It lives in rocky reefs, and is thought to lay large eggs that have a short larval phase, or that hatch directly as a juvenile. The species grows to a total length of 10 cm (3.9 in), and resembles a small European or American lobster; it was previously included in the same genus, Homarus, although it is not very closely related to those species, and

Melolontha melolontha. Larva of the cockchafer beetle. Stock Photo

RME7MPER–Melolontha melolontha. Larva of the cockchafer beetle.

RMTRGYHH–7 Spot Ladybird Larvae

17 year periodical Magicicada series - just after larval instar phase Stock Photo

RF2FNE2W0–17 year periodical Magicicada series - just after larval instar phase

Caterpillar - a hairy phase of the butterfly Stock Photo

RFBR5DA3–Caterpillar - a hairy phase of the butterfly

Spittlebug nymph or larval stage Stock Photo

RFT535MW–Spittlebug nymph or larval stage

Larval great crested newt (Triturus cristatus). Juvenile newts or efts caught during a pond-dipping activity at a Bioblitz event, UK. Stock Photo

RMW4AH3H–Larval great crested newt (Triturus cristatus). Juvenile newts or efts caught during a pond-dipping activity at a Bioblitz event, UK.

Coccinella septempunctata, the seven-spot ladybird (or, in North America, seven-spotted ladybug, shedding larval skin Stock Photo

RF2B7MB8N–Coccinella septempunctata, the seven-spot ladybird (or, in North America, seven-spotted ladybug, shedding larval skin

Larval case of broad-bodied chaser (Libellula depressa) in summer at Bournemouth. Stock Photo

RMBH4H7T–Larval case of broad-bodied chaser (Libellula depressa) in summer at Bournemouth.

RFBR60TB–Caterpillar - a hairy phase of the butterfly

Halichoeres Garnoti, Terminal Phase (Yellowhead Wrasse) 3059637868 o Stock Photo

RMKYMJXB–Halichoeres Garnoti, Terminal Phase (Yellowhead Wrasse) 3059637868 o

A tadpole (also called a pollywog or polliwog) is the larval stage in the life cycle of an amphibian, particularly that of a fro Stock Photo

RFGD3JWX–A tadpole (also called a pollywog or polliwog) is the larval stage in the life cycle of an amphibian, particularly that of a fro

Halichoeres Garnoti, Terminal Phase (Yellowhead Wrasse) Stock Photo

RMD5E00W–Halichoeres Garnoti, Terminal Phase (Yellowhead Wrasse)

RF2B90KAC–Homarus capensis, Print, The Cape lobster, Homarinus capensis, is a species of small lobster that lives off the coast of South Africa, from Dassen Island to Haga Haga. Only a few dozen specimens are known, mostly regurgitated by reef-dwelling fish. It lives in rocky reefs, and is thought to lay large eggs that have a short larval phase, or that hatch directly as a juvenile. The species grows to a total length of 10 cm (3.9 in), and resembles a small European or American lobster, it was previously included in the same genus, Homarus, although it is not very closely related to those species, and

. An introduction to zoology : for the use of high schools . Fig. 120.-Erijasiluawith egg-sacs fromgills of sunfish xiu Fig. 130.—Ach-thercs from gillsof catfish X 6. This form attaches itself by the anterior foot-jaws, which aremodified into suckers, but it is the piercing and sucking mouthwhich injures the fish. The remaining oider — the Cirri-pedia—lias only marine forms, whichpass through an active larval phase,but eventually attach themselves bytheir heads and secrete a compli-cated shell (Figs. 131 and 132). Theantennae are rudimentary, but thi-eepairs of jaws are present, and behindthes Stock Photo

RM2CDEFDG–. An introduction to zoology : for the use of high schools . Fig. 120.-Erijasiluawith egg-sacs fromgills of sunfish xiu Fig. 130.—Ach-thercs from gillsof catfish X 6. This form attaches itself by the anterior foot-jaws, which aremodified into suckers, but it is the piercing and sucking mouthwhich injures the fish. The remaining oider — the Cirri-pedia—lias only marine forms, whichpass through an active larval phase,but eventually attach themselves bytheir heads and secrete a compli-cated shell (Figs. 131 and 132). Theantennae are rudimentary, but thi-eepairs of jaws are present, and behindthes

Pyrrhalta viburni. Viburnum beetle larvae on Viburnum opulus leaves. Stock Photo

RMJ8HDTY–Pyrrhalta viburni. Viburnum beetle larvae on Viburnum opulus leaves.

Portrait of a facing forward eastern newt (red eft phase ) Notopthalmus viridescens Stock Photo

RFDCKAXX–Portrait of a facing forward eastern newt (red eft phase ) Notopthalmus viridescens

Group of common frog tadpoles (Rana temporaria) feeding on green string algae Stock Photo

RFPF494A–Group of common frog tadpoles (Rana temporaria) feeding on green string algae

A Box of Maggots used for Fishing Bait Stock Photo

RMB4K013–A Box of Maggots used for Fishing Bait

Cerceris rybyensis, ornate tailed digger wasp, hunting bees Stock Photo

RM2FP0K7W–Cerceris rybyensis, ornate tailed digger wasp, hunting bees

RMT81PHX–Beetle Larva

RMTRGYHJ–7 Spot Ladybird Larvae

Sympetrum striolatum common darter dragonfly Stock Photo

RMAY3TP2–Sympetrum striolatum common darter dragonfly

Tobacco Hornworm (Manduca sexta) feeding on tomato plant, E USA, by Skip Moody/Dembinsky Photo Assoc Stock Photo

RM2E9PWKT–Tobacco Hornworm (Manduca sexta) feeding on tomato plant, E USA, by Skip Moody/Dembinsky Photo Assoc

RF2WKECPY–Cocoon pupal stage icon outline vector. Larva metamorphosis process. Biological larval phase

Large (Cabbage) White butterfly caterpillar on broccoli plant Stock Photo

RMA07FDY–Large (Cabbage) White butterfly caterpillar on broccoli plant

RF2B7MB8T–Coccinella septempunctata, the seven-spot ladybird (or, in North America, seven-spotted ladybug, shedding larval skin

Euproctis similis, a vibrant moth caterpillar, found on a leaf, showing distinctive color and hair patterns Stock Photo

RF2WB8XK4–Euproctis similis, a vibrant moth caterpillar, found on a leaf, showing distinctive color and hair patterns

RFBR5NM2–Caterpillar - a hairy phase of the butterfly

Stages of jellyfish development from egg to adult Stock Vector

RF2X6N0MY–Stages of jellyfish development from egg to adult

RFGD3JWW–A tadpole (also called a pollywog or polliwog) is the larval stage in the life cycle of an amphibian, particularly that of a fro

Caterpillar of the White Ermine Moth Stock Photo

RMDER704–Caterpillar of the White Ermine Moth

. Degeneration : a chapter in Darwinism. Degeneration; Evolution. 24 DE GENERA TION. shrimp, which is illustrated in the wood-cuts (Fig. 3 and right lower corner of Fig 4). The little creature which issues from the tgg of this shrimp is known as the "Nauplius form." Many animals very different in appearance from this shrimp make their first. Fig. 4. — >J'aupluis larval-form of various Crustacea (Shrimps, Water-fleas, Barnacles, &c.). appearance in the world as Nauplii; and it appears probable that the Nauplius-phase is the recapitula- tive re-presentation of an ancestor common Stock Photo

RMPFNY2E–. Degeneration : a chapter in Darwinism. Degeneration; Evolution. 24 DE GENERA TION. shrimp, which is illustrated in the wood-cuts (Fig. 3 and right lower corner of Fig 4). The little creature which issues from the tgg of this shrimp is known as the "Nauplius form." Many animals very different in appearance from this shrimp make their first. Fig. 4. — >J'aupluis larval-form of various Crustacea (Shrimps, Water-fleas, Barnacles, &c.). appearance in the world as Nauplii; and it appears probable that the Nauplius-phase is the recapitula- tive re-presentation of an ancestor common

RM2CDEFB2–. An introduction to zoology : for the use of high schools . Fig. 120.-Erijasiluawith egg-sacs fromgills of sunfish xiu Fig. 130.—Ach-thercs from gillsof catfish X 6. This form attaches itself by the anterior foot-jaws, which aremodified into suckers, but it is the piercing and sucking mouthwhich injures the fish. The remaining oider — the Cirri-pedia—lias only marine forms, whichpass through an active larval phase,but eventually attach themselves bytheir heads and secrete a compli-cated shell (Figs. 131 and 132). Theantennae are rudimentary, but thi-eepairs of jaws are present, and behindthes

Armyworm larvae vary in color from dark greenish-brown to black. Stock Photo

RFH0GXYR–Armyworm larvae vary in color from dark greenish-brown to black.

Discovery reports (1964) Discovery reports discoveryreports32inst Year: 1964 370 DISCOVERY REPORTS from September to December (Fig. 119) combine in fact to support this view, the young swarms recorded in this locality without exception showing a distinct tendency to grow more slowly than their contemporaries in the Weddell zone and to attain complete adolescence at a somewhat later date. And so it would appear that in the purely larval developmental phase there are three distinct growth- STATION ADOL FURC 6 ' 5 ., 4 If) a 34 2' U30 2 28 ' 22 ui 020 < IS fM il2 8 N2 EXAM- -INED I 23 3 344 Stock Photo

RMT1HTN6–Discovery reports (1964) Discovery reports discoveryreports32inst Year: 1964 370 DISCOVERY REPORTS from September to December (Fig. 119) combine in fact to support this view, the young swarms recorded in this locality without exception showing a distinct tendency to grow more slowly than their contemporaries in the Weddell zone and to attain complete adolescence at a somewhat later date. And so it would appear that in the purely larval developmental phase there are three distinct growth- STATION ADOL FURC 6 ' 5 ., 4 If) a 34 2' U30 2 28 ' 22 ui 020 < IS fM il2 8 N2 EXAM- -INED I 23 3 344

Beetle Larva in Ponderosa Pine Stock Photo

RMT81PK1–Beetle Larva in Ponderosa Pine

RMTRGYHD–7 Spot Ladybird Larvae

RF2WKE6M8–Larval cocoon phase icon outline vector. Cocooning insect eggs. Biological pupa stage

RMA07FCX–Large (Cabbage) White butterfly caterpillar on broccoli plant

RF2B8W0N5–Coccinella septempunctata, the seven-spot ladybird (or, in North America, seven-spotted ladybug, shedding larval skin

RFBR5NWG–Caterpillar - a hairy phase of the butterfly

A tadpole (also called a pollywog or polliwog) is the larval stage in the life cycle of an amphibian Stock Photo

RFGD3JX4–A tadpole (also called a pollywog or polliwog) is the larval stage in the life cycle of an amphibian

. An introduction to zoology [microform] : for the use of high schools. Zoology; Zoologie. Fig. 12S.—Cyclops sp.. X 12. Flg.l29.-Ertja8iluii with e(f}f-8ac8 from gfillsofsunfish xlC Fig. 130.—Ach- thereg from gills ofcatAsh X 6. This form attaches itself by the anterior foot-jaws, which are modified into suckers, but it is the piercing and suckin^j mouth which injures the fish. The remaining order — the Cirri- pedia—has only marine forms, which pass through an active larval phase, but eventually attach themselves by their heads and secrete a compli- cated shell (Figs. 131 and 132). The antenna Stock Photo

RMRJ2J6T–. An introduction to zoology [microform] : for the use of high schools. Zoology; Zoologie. Fig. 12S.—Cyclops sp.. X 12. Flg.l29.-Ertja8iluii with e(f}f-8ac8 from gfillsofsunfish xlC Fig. 130.—Ach- thereg from gills ofcatAsh X 6. This form attaches itself by the anterior foot-jaws, which are modified into suckers, but it is the piercing and suckin^j mouth which injures the fish. The remaining order — the Cirri- pedia—has only marine forms, which pass through an active larval phase, but eventually attach themselves by their heads and secrete a compli- cated shell (Figs. 131 and 132). The antenna

RMT81PHY–Beetle Larva in Ponderosa Pine

RMTRGYHK–7 Spot Ladybird Larvae

RF2WKE6WA–Larval wrapping icon outline vector. Silk cocoon growth. Chrysalis metamorphosis process

RMA07FDM–Large (Cabbage) White butterfly caterpillar on broccoli plant

RF2B7T9RR–Coccinella septempunctata, the seven-spot ladybird (or, in North America, seven-spotted ladybug, shedding larval skin

RFBR5DTK–Caterpillar - a hairy phase of the butterfly

RFGD3JX7–A tadpole (also called a pollywog or polliwog) is the larval stage in the life cycle of an amphibian

. An introduction to zoology [microform] : for the use of high schools. Zoology; Zoologie. X 12. Flg.l29.-Ertja8iluii with e(f}f-8ac8 from gfillsofsunfish xlC Fig. 130.—Ach- thereg from gills ofcatAsh X 6. This form attaches itself by the anterior foot-jaws, which are modified into suckers, but it is the piercing and suckin^j mouth which injures the fish. The remaining order — the Cirri- pedia—has only marine forms, which pass through an active larval phase, but eventually attach themselves by their heads and secrete a compli- cated shell (Figs. 131 and 132). The antennas are rudimentary, but Stock Photo

RMRJ2J6G–. An introduction to zoology [microform] : for the use of high schools. Zoology; Zoologie. X 12. Flg.l29.-Ertja8iluii with e(f}f-8ac8 from gfillsofsunfish xlC Fig. 130.—Ach- thereg from gills ofcatAsh X 6. This form attaches itself by the anterior foot-jaws, which are modified into suckers, but it is the piercing and suckin^j mouth which injures the fish. The remaining order — the Cirri- pedia—has only marine forms, which pass through an active larval phase, but eventually attach themselves by their heads and secrete a compli- cated shell (Figs. 131 and 132). The antennas are rudimentary, but

RMT81PK2–Beetles in Ponderosa Pine

RMTRGYHG–7 Spot Ladybird Larvae

RF2WKE8BT–Cocooning phase icon outline vector. Caterpillar insect cycle life. Butterfly maturation stage

RF2B7T9RM–Coccinella septempunctata, the seven-spot ladybird (or, in North America, seven-spotted ladybug, shedding larval skin

RFBR5DW1–Caterpillar - a hairy phase of the butterfly

RFGD3JX1–A tadpole (also called a pollywog or polliwog) is the larval stage in the life cycle of an amphibian

. The life-histories of the British marine food-fishes. Fishes; Fishes; Fishes. 32 LIFE-HISTORY AND DEVELOPMENT OF less uniform tints. The ling shows a similar series of trans- formations, the colours, however, differing in their arrange- ment, being marked with gamboge-yellow in its larval, slightly barred in its early post-larval stage, then the body becomes. Fig. 6. Tessellated condition of young Cod (spirit-preparation). more or less uniformly tinted in its post-larval phase, and the little fish is furnished with a pair of enormously developed and bright yellow ventral fins (Fig. 6)—so dif Stock Photo

RMRDPCHX–. The life-histories of the British marine food-fishes. Fishes; Fishes; Fishes. 32 LIFE-HISTORY AND DEVELOPMENT OF less uniform tints. The ling shows a similar series of trans- formations, the colours, however, differing in their arrange- ment, being marked with gamboge-yellow in its larval, slightly barred in its early post-larval stage, then the body becomes. Fig. 6. Tessellated condition of young Cod (spirit-preparation). more or less uniformly tinted in its post-larval phase, and the little fish is furnished with a pair of enormously developed and bright yellow ventral fins (Fig. 6)—so dif

RMT81PJ0–Beetle Larva in Ponderosa Pine

RF2WKE71W–Cocoon lifecycle icon outline vector. Biology larval maturation. Caterpillar chrysalis biological process

RFBR5XMD–Caterpillar - a hairy phase of the butterfly

. The life-histories of the British marine food-fishes. Fishes; Fishes; Fishes. Fig. 6. Tessellated condition of young Cod (spirit-preparation). more or less uniformly tinted in its post-larval phase, and the little fish is furnished with a pair of enormously developed and bright yellow ventral fins (Fig. 6)—so different from the short ones of the adult. It is next striped longitudinally when. Fig. 6. Long-finned Post-larval Ling, enlarged. about three inches long (Fig. 7), thus affording a great contrast to the tessellated condition of the young cod. In this stage an olive-brown baud passes f Stock Photo

RMRDPCHN–. The life-histories of the British marine food-fishes. Fishes; Fishes; Fishes. Fig. 6. Tessellated condition of young Cod (spirit-preparation). more or less uniformly tinted in its post-larval phase, and the little fish is furnished with a pair of enormously developed and bright yellow ventral fins (Fig. 6)—so different from the short ones of the adult. It is next striped longitudinally when. Fig. 6. Long-finned Post-larval Ling, enlarged. about three inches long (Fig. 7), thus affording a great contrast to the tessellated condition of the young cod. In this stage an olive-brown baud passes f

RF2WKECDC–Silk cocoon icon outline vector. Insect cocooning stage. Metamorphosis larva process

RFBR5Y6J–Caterpillar - a hairy phase of the butterfly

RFBR5DR3–Caterpillar - a hairy phase of the butterfly

. Birds of other lands, reptiles, fishes, jointed animals and lower forms; . us *Vt6- rh„r k, ir. r. v^nd^, f.z.s. AMERICAN BULL-FROG Youn^ ducki are icmetimes a food oj t/iis i-otaaous Batracha?: FROGS AND TOADS 201. Positwn of thefamous dish Amphibia is afforded by the circumstance thatthey all pass through a transitional or lar alcondition before arriving at the adult state.The familiar tadpole phase of the common frogor toad typically illustrates this point. Duringits earliest larval state the fish-like resem-blance is especially conspicuous. In additionto possessing gills, the body is li Stock Photo

RM2CPMR6Y–. Birds of other lands, reptiles, fishes, jointed animals and lower forms; . us *Vt6- rh„r k, ir. r. v^nd^, f.z.s. AMERICAN BULL-FROG Youn^ ducki are icmetimes a food oj t/iis i-otaaous Batracha?: FROGS AND TOADS 201. Positwn of thefamous dish Amphibia is afforded by the circumstance thatthey all pass through a transitional or lar alcondition before arriving at the adult state.The familiar tadpole phase of the common frogor toad typically illustrates this point. Duringits earliest larval state the fish-like resem-blance is especially conspicuous. In additionto possessing gills, the body is li

RF2WKECEE–Chrysalis shell icon outline vector. Insect cocoon protection. Insects metamorphosis lifecycle

RFBR5DA7–Caterpillar - a hairy phase of the butterfly

. Elementary text-book of zoology. Zoology. 130 ORGANIZATION AND DEVELOPMENT OF ANIMALS. It is, however, extremely probable that the masses of cells from which the Cercariae arise represent the rudiments of ovaries, the elements of which develop parthenogenetically without the addition of spermatozoa. The so-called germ sacs (Sporocysts or Rediae) would in this case be larvae, which possess the power of reproduction; and the development of- the Distomeaa would conie under the head of heterogamy. The Cercarise, however, represent a second and more advanced larval phase. Provided with a motile t Stock Photo

RMRCXNRG–. Elementary text-book of zoology. Zoology. 130 ORGANIZATION AND DEVELOPMENT OF ANIMALS. It is, however, extremely probable that the masses of cells from which the Cercariae arise represent the rudiments of ovaries, the elements of which develop parthenogenetically without the addition of spermatozoa. The so-called germ sacs (Sporocysts or Rediae) would in this case be larvae, which possess the power of reproduction; and the development of- the Distomeaa would conie under the head of heterogamy. The Cercarise, however, represent a second and more advanced larval phase. Provided with a motile t

RF2WKE7TT–Cocoon maturation icon outline vector. Biology cocooning stage. Butterfly insect transformation

. Amphioxus and the ancestry of the vertebrates [microform]. Vertebrates; Chordata; Fishes; Ascidiacea; Vertébrés; Cordés; Poissons; Ascidiacés. If: 1^,6 DEVELOrMEXT OF AMPHIOXUS. ceed. With their appearance, the larva enters upon that phase of its development which has been called the later larval period. It is the period of the metamorphosis of the larva, during which the pronounced asymmetrical arrangement of the parts is exchanged for the partial, but not absolute, symmetry which we have noted in the adult. The metamorphosis, therefore, consists largely in the sym- metrisation of the larva Stock Photo

RMRJ26HK–. Amphioxus and the ancestry of the vertebrates [microform]. Vertebrates; Chordata; Fishes; Ascidiacea; Vertébrés; Cordés; Poissons; Ascidiacés. If: 1^,6 DEVELOrMEXT OF AMPHIOXUS. ceed. With their appearance, the larva enters upon that phase of its development which has been called the later larval period. It is the period of the metamorphosis of the larva, during which the pronounced asymmetrical arrangement of the parts is exchanged for the partial, but not absolute, symmetry which we have noted in the adult. The metamorphosis, therefore, consists largely in the sym- metrisation of the larva

RF2WKE5RC–Butterfly biology icon outline vector. Cocoon cycle life. Larva insect growth

. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 172 WESLEY R. COE may be discharged simultaneously. Under experimental conditions self- fertilization occurs readily; this is followed by the formation of the polar bodies and cleavage, but only as far as the blastula and gastrula stages. For the normal processes of larval development the environ- mental conditions peculiar to the maternal gill chambers appear to be necessary.. A FIG. 2. Teredo diegensis. Sections of three follicles from gonad of second male-phase individual which had branchial brood pouches distended with l Stock Photo

RMRHP3XP–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 172 WESLEY R. COE may be discharged simultaneously. Under experimental conditions self- fertilization occurs readily; this is followed by the formation of the polar bodies and cleavage, but only as far as the blastula and gastrula stages. For the normal processes of larval development the environ- mental conditions peculiar to the maternal gill chambers appear to be necessary.. A FIG. 2. Teredo diegensis. Sections of three follicles from gonad of second male-phase individual which had branchial brood pouches distended with l

RF2WKED18–Larvae cocoon icon outline vector. Moth metamorphosis. Maturation insects cycle life

. The infancy of animals. Animal behavior; Natural history. CONCERNING TADPOLES 187 -ef the frogs and toads known as the " Urodela " or " tailed Batrachians," and in common speech as the " efts" or " newts," and the " salamanders." These creatures retain their tails throughout life, and display only a " larval " stage : the tadpole phase of the frogs and toads being more or less retained throughout life. Why is it that the early history of the young newt, or salaman- der, is so much more simple and direct than is the case with the fro Stock Photo

RMRE0B78–. The infancy of animals. Animal behavior; Natural history. CONCERNING TADPOLES 187 -ef the frogs and toads known as the " Urodela " or " tailed Batrachians," and in common speech as the " efts" or " newts," and the " salamanders." These creatures retain their tails throughout life, and display only a " larval " stage : the tadpole phase of the frogs and toads being more or less retained throughout life. Why is it that the early history of the young newt, or salaman- der, is so much more simple and direct than is the case with the fro

RF2WKE719–Cocooning eggs icon outline vector. Insect protective cover. Larva growth process

. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. LARVAL HATCHING OF A TERRESTRIAL CRAB 403 a pipette. This exchange of beakers was made during the dark phase under the illumination of a hand-held flashlight covered with red cellophane. Each female from which some embryos had been de- tached was also monitored, and the time of larval release recorded. The recording system consisted of a sensor unit (infrared source-receiver) and a controller unit with a photoelectric switch. The sensor unit was placed in the experimental room, and the controller unit was set outside the roo Stock Photo

RMRHKNFR–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. LARVAL HATCHING OF A TERRESTRIAL CRAB 403 a pipette. This exchange of beakers was made during the dark phase under the illumination of a hand-held flashlight covered with red cellophane. Each female from which some embryos had been de- tached was also monitored, and the time of larval release recorded. The recording system consisted of a sensor unit (infrared source-receiver) and a controller unit with a photoelectric switch. The sensor unit was placed in the experimental room, and the controller unit was set outside the roo

RF2WKE8BF–Cocoon icon outline vector. Butterfly growth. Larva metamorphosis process

. The infancy of animals. Animals. CONCERNING TADPOLES 187 of the frogs and toads known as the " Urodela " or " tailed Batrachians," and in common speech as the " efts" or " newts," and the " salamanders." These creatures retain their tails throughout life, and display only a " larval " stage : the tadpole phase of the frogs and toads being more or less retained throughout Hfe. Why is it that the early history of the young newt, or salaman- der, is so much more simple and direct than is the case with the frog and its kind ? We ask at Stock Photo

RMRDRXMT–. The infancy of animals. Animals. CONCERNING TADPOLES 187 of the frogs and toads known as the " Urodela " or " tailed Batrachians," and in common speech as the " efts" or " newts," and the " salamanders." These creatures retain their tails throughout life, and display only a " larval " stage : the tadpole phase of the frogs and toads being more or less retained throughout Hfe. Why is it that the early history of the young newt, or salaman- der, is so much more simple and direct than is the case with the frog and its kind ? We ask at

RF2WKE9M7–Hanging cocoon icon outline vector. Moths development life cycle. Silk caterpillar larva

RMRD27K0–. Degeneration : a chapter in Darwinism. Degeneration; Evolution. 24 DE GENERA TION. shrimp, which is illustrated in the wood-cuts (Fig. 3 and right lower corner of Fig 4). The little creature which issues from the tgg of this shrimp is known as the "Nauplius form." Many animals very different in appearance from this shrimp make their first. Fig. 4. — >J'aupluis larval-form of various Crustacea (Shrimps, Water-fleas, Barnacles, &c.). appearance in the world as Nauplii; and it appears probable that the Nauplius-phase is the recapitula- tive re-presentation of an ancestor common

RF2WKE9FW–Butterfly metamorphosis icon outline vector. Cocoon cycle life. Insect cocooning stage

. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. AMBYSTOMA MACULATUM 187 That the departure from a single sigmoid curve during the early development is not a distinct phase of growth may be demonstrated. When an " index of build " (Length VWeight) is computed (Table I), it is clearly indicated that length and weight are not directly associated during the early stages. This index varies constantly to a period shortly before hatching when the embryonic axis becomes linear. It is fairly constant, however, for the free living larval stages. A group of experiments car Stock Photo

RMRHMTE7–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. AMBYSTOMA MACULATUM 187 That the departure from a single sigmoid curve during the early development is not a distinct phase of growth may be demonstrated. When an " index of build " (Length VWeight) is computed (Table I), it is clearly indicated that length and weight are not directly associated during the early stages. This index varies constantly to a period shortly before hatching when the embryonic axis becomes linear. It is fairly constant, however, for the free living larval stages. A group of experiments car

RF2WKE87B–Cocoon evolution icon outline vector. Insect metamorphosis, Silk caterpillar chrysalis

. Concerning evolution. Evolution. FIGURE NO. 12 YOUNG FORM OF ROSY FEATHER-STAR [Antedon rosacea] Most of the adult feather-stars or sea-lilies (Crinoids) were fixed forms, with the cup and the arms borne on a stalk. The same is true of some of the present-day forms. The common Antedon, however, moves about freely, and can swim by bending its pinnate arms. It is interesting to find that after its free-swimming larval stage is over, the developing Antedon passes through a sedentary phase, here represented. The individual recapitulates racial his- tory. On attaining a certain size the Antedon, Stock Photo

RMREC7DG–. Concerning evolution. Evolution. FIGURE NO. 12 YOUNG FORM OF ROSY FEATHER-STAR [Antedon rosacea] Most of the adult feather-stars or sea-lilies (Crinoids) were fixed forms, with the cup and the arms borne on a stalk. The same is true of some of the present-day forms. The common Antedon, however, moves about freely, and can swim by bending its pinnate arms. It is interesting to find that after its free-swimming larval stage is over, the developing Antedon passes through a sedentary phase, here represented. The individual recapitulates racial his- tory. On attaining a certain size the Antedon,

RF2WKEC7T–Butterfly cocoon icon outline vector. Butterfly transformation. Insect cycle life development

. Birds of other lands, reptiles, fishes, jointed animals and lower forms;. Zoology; Birds; Reptiles; Fishes. PAoro b, Schtlailu Phot, Co. EDIBLE FROG The hind /c-fj only of thn ipeciei are uied for (he compo^it'on rjf trie jamrjus dlih Amphibia is atibrded by the circumstance that they all pass through a transitional or larx'al condition before arrix'ing at the adult state. The familiar tadpole phase of the common frog or toad ts'pically illustrates this p(.iint. During its earliest larval state the fish-like resem- blance is especially conspicuous. In addition to possessing gills, the btidv Stock Photo

RMRDKJK2–. Birds of other lands, reptiles, fishes, jointed animals and lower forms;. Zoology; Birds; Reptiles; Fishes. PAoro b, Schtlailu Phot, Co. EDIBLE FROG The hind /c-fj only of thn ipeciei are uied for (he compo^it'on rjf trie jamrjus dlih Amphibia is atibrded by the circumstance that they all pass through a transitional or larx'al condition before arrix'ing at the adult state. The familiar tadpole phase of the common frog or toad ts'pically illustrates this p(.iint. During its earliest larval state the fish-like resem- blance is especially conspicuous. In addition to possessing gills, the btidv

RF2WKE9MD–Insect cocoon icon outline vector. Silk chrysalis pupa. Butterflies life cycle transformation

. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Figure 6A. Time of day of larval release monitored under a 24-h LD cycle (LD 15:9). the phase of which was similar to that of the field. Date of collection: 3-4 July 1991. About 100 animals were used in the experiment. Symbols were the same as in Figure 2. Excirolana. Cyclical or non-cyclical changes of hydrostatic pressure have been shown to cause behavioral responses in the amphipods (Enright, 1962; Morgan, 1965). How- ever, all the experimental data obtained in this study (Figs. 2-5 and 6A, B) have demonstrated that a lig Stock Photo

RMRHMXCE–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Figure 6A. Time of day of larval release monitored under a 24-h LD cycle (LD 15:9). the phase of which was similar to that of the field. Date of collection: 3-4 July 1991. About 100 animals were used in the experiment. Symbols were the same as in Figure 2. Excirolana. Cyclical or non-cyclical changes of hydrostatic pressure have been shown to cause behavioral responses in the amphipods (Enright, 1962; Morgan, 1965). How- ever, all the experimental data obtained in this study (Figs. 2-5 and 6A, B) have demonstrated that a lig

RF2WKE9X7–Metamorphosis cover icon outline vector. Larva cocooning stage. Insect biology life cycle

. Insect and disease conditions in the United States, 1979-83 : what else is growing in our forests?. Forest insects United States; Trees Diseases and pests United States; Plants Disease and pest resistance. Figure 3. Female moths attached to their cocoons. One female has already laid four white eggs. F-705626 Figure 4. Larvae dispersing from egg- (fig. 6). During Phase [, the population increases rapidly to outbreak levels; defoliation, however, is generally spotty and light. Phase I is followed by Phase II, the time of maximum insect density and maximum activity. Larval numbers are highest a Stock Photo

RMRFCCGD–. Insect and disease conditions in the United States, 1979-83 : what else is growing in our forests?. Forest insects United States; Trees Diseases and pests United States; Plants Disease and pest resistance. Figure 3. Female moths attached to their cocoons. One female has already laid four white eggs. F-705626 Figure 4. Larvae dispersing from egg- (fig. 6). During Phase [, the population increases rapidly to outbreak levels; defoliation, however, is generally spotty and light. Phase I is followed by Phase II, the time of maximum insect density and maximum activity. Larval numbers are highest a

. Birds of other lands, reptiles, fishes, jointed animals and lower forms;. Zoology; Birds; Reptiles; Fishes. FROGS AND TOADS 201. PAoro b, Schtlailu Phot, Co. EDIBLE FROG The hind /c-fj only of thn ipeciei are uied for (he compo^it'on rjf trie jamrjus dlih Amphibia is atibrded by the circumstance that they all pass through a transitional or larx'al condition before arrix'ing at the adult state. The familiar tadpole phase of the common frog or toad ts'pically illustrates this p(.iint. During its earliest larval state the fish-like resem- blance is especially conspicuous. In addition to possess Stock Photo

RMRDKJK7–. Birds of other lands, reptiles, fishes, jointed animals and lower forms;. Zoology; Birds; Reptiles; Fishes. FROGS AND TOADS 201. PAoro b, Schtlailu Phot, Co. EDIBLE FROG The hind /c-fj only of thn ipeciei are uied for (he compo^it'on rjf trie jamrjus dlih Amphibia is atibrded by the circumstance that they all pass through a transitional or larx'al condition before arrix'ing at the adult state. The familiar tadpole phase of the common frog or toad ts'pically illustrates this p(.iint. During its earliest larval state the fish-like resem- blance is especially conspicuous. In addition to possess

. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 158 R. B. FORWARD, JR. AND K. J. LOHMANN pendently of the female and is not randomly occurring over the solar day. Thus it is possible to compare the mean time of hatching by detached egg to the mean time of larval release by the female. On all nights and conditions (Fig. 2) hatching times are not uniformly distributed over the 5 h sampling interval (P < .05, Kolmogorov- Smirnov test for goodness of fit). The greatest number of females released larvae between 30-60 min after the beginning of the dark phase, while for the Stock Photo

RMRHN2MK–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 158 R. B. FORWARD, JR. AND K. J. LOHMANN pendently of the female and is not randomly occurring over the solar day. Thus it is possible to compare the mean time of hatching by detached egg to the mean time of larval release by the female. On all nights and conditions (Fig. 2) hatching times are not uniformly distributed over the 5 h sampling interval (P < .05, Kolmogorov- Smirnov test for goodness of fit). The greatest number of females released larvae between 30-60 min after the beginning of the dark phase, while for the

. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Eggs in still water N 2 n = 24. Time (h) FIGURE 2. Distribution of mean times of larval release by ovigerous females and of hatching by their detached eggs for different numbers of crabs (ordinate) relative to time (abscissa) of end of the light phase. After "lights off' on the first night (N-l), crabs and separated eg^s were maintained in constant conditions and monitored again at the time of the next night (N-2). n indicates the number of hatches or releases measured for each condition.. Please note that these images Stock Photo

RMRHN2N6–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Eggs in still water N 2 n = 24. Time (h) FIGURE 2. Distribution of mean times of larval release by ovigerous females and of hatching by their detached eggs for different numbers of crabs (ordinate) relative to time (abscissa) of end of the light phase. After "lights off' on the first night (N-l), crabs and separated eg^s were maintained in constant conditions and monitored again at the time of the next night (N-2). n indicates the number of hatches or releases measured for each condition.. Please note that these images

RMRF308A–. Insect and disease conditions in the United States, 1979-83 : what else is growing in our forests?. Forest insects United States; Trees Diseases and pests United States; Plants Disease and pest resistance. Figure 3. Female moths attached to their cocoons. One female has already laid four white eggs. F-705626 Figure 4. Larvae dispersing from egg- (fig. 6). During Phase [, the population increases rapidly to outbreak levels; defoliation, however, is generally spotty and light. Phase I is followed by Phase II, the time of maximum insect density and maximum activity. Larval numbers are highest a

. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 296 R. B. FORWARD ET AL.. Other times FIGURE 7. Number of releases (ordinate) at times (abscissa) relative to the end of the light phase for crabs from estuary B which were placed on a 14:10 LD cycle in the laboratory for 6 or 7 days and then maintained under constant conditions. "Lights off" indicates the end of the light phase on the first night. Other symbols, as in Figure 1. intervals for a month. The crabs were collected several hours before daytime high tide, and larval release measured as described for crabs Stock Photo

RMRHN454–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 296 R. B. FORWARD ET AL.. Other times FIGURE 7. Number of releases (ordinate) at times (abscissa) relative to the end of the light phase for crabs from estuary B which were placed on a 14:10 LD cycle in the laboratory for 6 or 7 days and then maintained under constant conditions. "Lights off" indicates the end of the light phase on the first night. Other symbols, as in Figure 1. intervals for a month. The crabs were collected several hours before daytime high tide, and larval release measured as described for crabs

. The Biological bulletin. Biology; Zoology; Marine biology. 498 ANNE RUDLOE 01- 5- 10 20. FULL F + Iwk NEW LUNAR PHASE F+lwk Figure 2. Mean depth of larval nests at the hour of high tide at each lunar phase for one month. Bars indicate 1 s.d. There was also a major release of larvae whenever localized storms with strong onshore winds coincided with high tide, producing an unusually heavy surf. Under these circumstances, larvae were released by day as well as by night. Following a massive storm release in July, the following full moon did not show the usual peak of emergence. The larvae that Stock Photo

RMRHM2TH–. The Biological bulletin. Biology; Zoology; Marine biology. 498 ANNE RUDLOE 01- 5- 10 20. FULL F + Iwk NEW LUNAR PHASE F+lwk Figure 2. Mean depth of larval nests at the hour of high tide at each lunar phase for one month. Bars indicate 1 s.d. There was also a major release of larvae whenever localized storms with strong onshore winds coincided with high tide, producing an unusually heavy surf. Under these circumstances, larvae were released by day as well as by night. Following a massive storm release in July, the following full moon did not show the usual peak of emergence. The larvae that

. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. -SR. SS 52h 4.1 h Figure 6B. Time of day of larval release recorded in a 24-h LD cycle (LD 15:9), the phase of which was advanced by 4-5 h from that of the field. Date of collection was the same as in Figure 6A. Times of light- on and light-off were at 0:00 and 15:00, respectively. One hundred and five animals were used in the experiment.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfec Stock Photo

RMRHMXC8–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. -SR. SS 52h 4.1 h Figure 6B. Time of day of larval release recorded in a 24-h LD cycle (LD 15:9), the phase of which was advanced by 4-5 h from that of the field. Date of collection was the same as in Figure 6A. Times of light- on and light-off were at 0:00 and 15:00, respectively. One hundred and five animals were used in the experiment.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfec

. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. A TIDAL RHYTHM OF THE SEMI-TERRESTRIAL CRAB 263 Time of day 12 1991 Jul 3 9 5. Figure 6A. Time of day of larval release monitored under a 24-h LD cycle (LD 15:9). the phase of which was similar to that of the field. Date of collection: 3-4 July 1991. About 100 animals were used in the experiment. Symbols were the same as in Figure 2. Excirolana. Cyclical or non-cyclical changes of hydrostatic pressure have been shown to cause behavioral responses in the amphipods (Enright, 1962; Morgan, 1965). How- ever, all the experimental Stock Photo

RMRHMXCN–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. A TIDAL RHYTHM OF THE SEMI-TERRESTRIAL CRAB 263 Time of day 12 1991 Jul 3 9 5. Figure 6A. Time of day of larval release monitored under a 24-h LD cycle (LD 15:9). the phase of which was similar to that of the field. Date of collection: 3-4 July 1991. About 100 animals were used in the experiment. Symbols were the same as in Figure 2. Excirolana. Cyclical or non-cyclical changes of hydrostatic pressure have been shown to cause behavioral responses in the amphipods (Enright, 1962; Morgan, 1965). How- ever, all the experimental

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