The reproductive biology of two epibenthic species of Antarctic nototheniid fish of the genus Trematomus
Abstract Trematomus eulepidotus and T. loennbergii are two of the most common epibenthic fish in the waters of the High Antarctic continental shelf. Since the reproductive biology of these species has not been studied in the Ross Sea, we provide a macroscopic and histological analysis of the reprodu...
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crcambridgeupr:10.1017/s095410200800103x 2024-03-03T08:38:02+00:00 The reproductive biology of two epibenthic species of Antarctic nototheniid fish of the genus Trematomus La Mesa, Mario Caputo, Vincenzo Eastman, Joseph T. 2008 http://dx.doi.org/10.1017/s095410200800103x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S095410200800103X en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 20, issue 4, page 355-364 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2008 crcambridgeupr https://doi.org/10.1017/s095410200800103x 2024-02-08T08:46:06Z Abstract Trematomus eulepidotus and T. loennbergii are two of the most common epibenthic fish in the waters of the High Antarctic continental shelf. Since the reproductive biology of these species has not been studied in the Ross Sea, we provide a macroscopic and histological analysis of the reproductive effort and gonadal development in both sexes. Most samples were collected during benthic trawl surveys in the south-western Ross Sea in the 1996 and 1997 summer seasons. The aim of the study was to define the reproductive characteristics of these two sympatric species and to examine the hypothesis that different reproductive strategies mitigate interspecific competition. We found that, in common with most Antarctic notothenioids, both species possess a suite of similar reproductive strategies including delayed sexual maturity, prolonged gametogenesis, group-synchronous oocyte maturation, a single spawning event per year and iteroparity. Both species show a comparable reproductive effort in terms of potential fecundity with between 2000 and 20 000 eggs per female per season. Nevertheless, the two species exhibited a considerable difference in the timing of the breeding season, spawning in summer ( T. eulepidotus ) and in autumn ( T. loennbergii ). This gives rise to a mismatch in the time of appearance of larvae in the environment and probably leads to reduced competition. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Ross Sea Cambridge University Press Antarctic Ross Sea Antarctic Science 20 4 355 364 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography La Mesa, Mario Caputo, Vincenzo Eastman, Joseph T. The reproductive biology of two epibenthic species of Antarctic nototheniid fish of the genus Trematomus |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Trematomus eulepidotus and T. loennbergii are two of the most common epibenthic fish in the waters of the High Antarctic continental shelf. Since the reproductive biology of these species has not been studied in the Ross Sea, we provide a macroscopic and histological analysis of the reproductive effort and gonadal development in both sexes. Most samples were collected during benthic trawl surveys in the south-western Ross Sea in the 1996 and 1997 summer seasons. The aim of the study was to define the reproductive characteristics of these two sympatric species and to examine the hypothesis that different reproductive strategies mitigate interspecific competition. We found that, in common with most Antarctic notothenioids, both species possess a suite of similar reproductive strategies including delayed sexual maturity, prolonged gametogenesis, group-synchronous oocyte maturation, a single spawning event per year and iteroparity. Both species show a comparable reproductive effort in terms of potential fecundity with between 2000 and 20 000 eggs per female per season. Nevertheless, the two species exhibited a considerable difference in the timing of the breeding season, spawning in summer ( T. eulepidotus ) and in autumn ( T. loennbergii ). This gives rise to a mismatch in the time of appearance of larvae in the environment and probably leads to reduced competition. |
format |
Article in Journal/Newspaper |
author |
La Mesa, Mario Caputo, Vincenzo Eastman, Joseph T. |
author_facet |
La Mesa, Mario Caputo, Vincenzo Eastman, Joseph T. |
author_sort |
La Mesa, Mario |
title |
The reproductive biology of two epibenthic species of Antarctic nototheniid fish of the genus Trematomus |
title_short |
The reproductive biology of two epibenthic species of Antarctic nototheniid fish of the genus Trematomus |
title_full |
The reproductive biology of two epibenthic species of Antarctic nototheniid fish of the genus Trematomus |
title_fullStr |
The reproductive biology of two epibenthic species of Antarctic nototheniid fish of the genus Trematomus |
title_full_unstemmed |
The reproductive biology of two epibenthic species of Antarctic nototheniid fish of the genus Trematomus |
title_sort |
reproductive biology of two epibenthic species of antarctic nototheniid fish of the genus trematomus |
publisher |
Cambridge University Press (CUP) |
publishDate |
2008 |
url |
http://dx.doi.org/10.1017/s095410200800103x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S095410200800103X |
geographic |
Antarctic Ross Sea |
geographic_facet |
Antarctic Ross Sea |
genre |
Antarc* Antarctic Antarctic Science Ross Sea |
genre_facet |
Antarc* Antarctic Antarctic Science Ross Sea |
op_source |
Antarctic Science volume 20, issue 4, page 355-364 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s095410200800103x |
container_title |
Antarctic Science |
container_volume |
20 |
container_issue |
4 |
container_start_page |
355 |
op_container_end_page |
364 |
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1792503923906445312 |