Relative growth of paralarvae and juveniles of Illex argentinus (Castellanos, 1960) in southern Brazil
Ommastrephid squids undergo remarkable morphological change during the transition from planktonic paralarvae to adults. These changes are characterized by changes in the relative growth of body dimensions and mark phases and stages in post-embryonic development. The following morphometric characters...
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Cambridge University Press (CUP)
1994
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Online Access: | http://dx.doi.org/10.1017/s0954102094000416 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102094000416 |
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crcambridgeupr:10.1017/s0954102094000416 2024-04-28T08:03:27+00:00 Relative growth of paralarvae and juveniles of Illex argentinus (Castellanos, 1960) in southern Brazil Vidal, Erica A.G. 1994 http://dx.doi.org/10.1017/s0954102094000416 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102094000416 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 6, issue 2, page 275-282 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 1994 crcambridgeupr https://doi.org/10.1017/s0954102094000416 2024-04-02T06:55:12Z Ommastrephid squids undergo remarkable morphological change during the transition from planktonic paralarvae to adults. These changes are characterized by changes in the relative growth of body dimensions and mark phases and stages in post-embryonic development. The following morphometric characters of paralarval and juvenille Illex argentinus ranging in size from 1–55 mm ML were measured: dorsal mantle length (ML), mantle width (MW), head width (HW), eye diameter (ED), right arm lengths (AIL) (AIIL) (AIIIL) (AIVL), proboscis length (PL), proboscis division (PD), fin length (FL), fin width (FW), right tentacle length (TL), club length (CIL), dactylus length (DL) and carpus + manus length (CML). The relative growth of AIL, AIIL, AIIIL, HW and ED, showed discontinuities at c. 14 mm ML, while AIL, AIIL, AIIIL, AIVL, FL, and TL showed other discontinuities at c. 28 mm ML. These discontinuities seem to be related to the activity and ability of the animal to obtain food and survive in different environments. At an early phase (1–14 mm ML), there is a rapid development of the arms, suckers and fins. In the second stage (14–28 mm ML) there is a rapid development of the tentacles and clubs. In the third (>28 mm ML), the juvenile grows more in length in relation to other body parts. No morphological change, besides the proboscis division, takes place at the end of rhynchoteuthion stage. This may indicate the necessity for re-evaluation of the paralarval phase in Ommastrephidae. Article in Journal/Newspaper Antarctic Science Cambridge University Press Antarctic Science 6 2 275 282 |
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Cambridge University Press |
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English |
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Geology Ecology, Evolution, Behavior and Systematics Oceanography |
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Geology Ecology, Evolution, Behavior and Systematics Oceanography Vidal, Erica A.G. Relative growth of paralarvae and juveniles of Illex argentinus (Castellanos, 1960) in southern Brazil |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Ommastrephid squids undergo remarkable morphological change during the transition from planktonic paralarvae to adults. These changes are characterized by changes in the relative growth of body dimensions and mark phases and stages in post-embryonic development. The following morphometric characters of paralarval and juvenille Illex argentinus ranging in size from 1–55 mm ML were measured: dorsal mantle length (ML), mantle width (MW), head width (HW), eye diameter (ED), right arm lengths (AIL) (AIIL) (AIIIL) (AIVL), proboscis length (PL), proboscis division (PD), fin length (FL), fin width (FW), right tentacle length (TL), club length (CIL), dactylus length (DL) and carpus + manus length (CML). The relative growth of AIL, AIIL, AIIIL, HW and ED, showed discontinuities at c. 14 mm ML, while AIL, AIIL, AIIIL, AIVL, FL, and TL showed other discontinuities at c. 28 mm ML. These discontinuities seem to be related to the activity and ability of the animal to obtain food and survive in different environments. At an early phase (1–14 mm ML), there is a rapid development of the arms, suckers and fins. In the second stage (14–28 mm ML) there is a rapid development of the tentacles and clubs. In the third (>28 mm ML), the juvenile grows more in length in relation to other body parts. No morphological change, besides the proboscis division, takes place at the end of rhynchoteuthion stage. This may indicate the necessity for re-evaluation of the paralarval phase in Ommastrephidae. |
format |
Article in Journal/Newspaper |
author |
Vidal, Erica A.G. |
author_facet |
Vidal, Erica A.G. |
author_sort |
Vidal, Erica A.G. |
title |
Relative growth of paralarvae and juveniles of Illex argentinus (Castellanos, 1960) in southern Brazil |
title_short |
Relative growth of paralarvae and juveniles of Illex argentinus (Castellanos, 1960) in southern Brazil |
title_full |
Relative growth of paralarvae and juveniles of Illex argentinus (Castellanos, 1960) in southern Brazil |
title_fullStr |
Relative growth of paralarvae and juveniles of Illex argentinus (Castellanos, 1960) in southern Brazil |
title_full_unstemmed |
Relative growth of paralarvae and juveniles of Illex argentinus (Castellanos, 1960) in southern Brazil |
title_sort |
relative growth of paralarvae and juveniles of illex argentinus (castellanos, 1960) in southern brazil |
publisher |
Cambridge University Press (CUP) |
publishDate |
1994 |
url |
http://dx.doi.org/10.1017/s0954102094000416 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102094000416 |
genre |
Antarctic Science |
genre_facet |
Antarctic Science |
op_source |
Antarctic Science volume 6, issue 2, page 275-282 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102094000416 |
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Antarctic Science |
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6 |
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2 |
container_start_page |
275 |
op_container_end_page |
282 |
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1797574549077753856 |