The reproductive biology of two epibenthic species of Antarctic notothenild fish of the genus Trematomus
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 eff...
Published in: | Antarctic Science |
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Cambridge Univ Press
2008
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ftpuma:oai:pumaoai.isti.cnr.it:cnr.ismar/cnr.ismar.an/2008-A0-009 2023-05-15T13:38:08+02:00 The reproductive biology of two epibenthic species of Antarctic notothenild fish of the genus Trematomus La Mesa, M. Caputo, V. Eastman, J.T. 2008 application/pdf http://puma.isti.cnr.it/dfdownloadnew.php?ident=cnr.ismar/cnr.ismar.an/2008-A0-009 http://puma.isti.cnr.it/rmydownload.php?filename=cnr.ismar/cnr.ismar.an/2008-A0-009/2008-A0-009.pdf en eng Cambridge Univ Press info:eu-repo/grantAgreement/EC/FP7/274110/EU/Mining for new antimicrobials in ant associated actinomycetes/ANT info:eu-repo/semantics/altIdentifier/issn/0954-1020 info:eu-repo/semantics/altIdentifier/doi/10.1017/S095410200800103X info:eu-repo/semantics/restrictedAccess In: Antarctic Science, vol. 20 (4) pp. 355 - 364. Cambridge Univ Press, 2008. gametogenesis reproductive strategies Ross Sea sexual maturity info:eu-repo/semantics/article 2008 ftpuma https://doi.org/10.1017/S095410200800103X 2017-06-15T09:21:15Z 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 PUMAlab (ISTI CNR - National Research Council) Antarctic Ross Sea Antarctic Science 20 4 355 364 |
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Open Polar |
collection |
PUMAlab (ISTI CNR - National Research Council) |
op_collection_id |
ftpuma |
language |
English |
topic |
gametogenesis reproductive strategies Ross Sea sexual maturity |
spellingShingle |
gametogenesis reproductive strategies Ross Sea sexual maturity La Mesa, M. Caputo, V. Eastman, J.T. The reproductive biology of two epibenthic species of Antarctic notothenild fish of the genus Trematomus |
topic_facet |
gametogenesis reproductive strategies Ross Sea sexual maturity |
description |
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, M. Caputo, V. Eastman, J.T. |
author_facet |
La Mesa, M. Caputo, V. Eastman, J.T. |
author_sort |
La Mesa, M. |
title |
The reproductive biology of two epibenthic species of Antarctic notothenild fish of the genus Trematomus |
title_short |
The reproductive biology of two epibenthic species of Antarctic notothenild fish of the genus Trematomus |
title_full |
The reproductive biology of two epibenthic species of Antarctic notothenild fish of the genus Trematomus |
title_fullStr |
The reproductive biology of two epibenthic species of Antarctic notothenild fish of the genus Trematomus |
title_full_unstemmed |
The reproductive biology of two epibenthic species of Antarctic notothenild fish of the genus Trematomus |
title_sort |
reproductive biology of two epibenthic species of antarctic notothenild fish of the genus trematomus |
publisher |
Cambridge Univ Press |
publishDate |
2008 |
url |
http://puma.isti.cnr.it/dfdownloadnew.php?ident=cnr.ismar/cnr.ismar.an/2008-A0-009 http://puma.isti.cnr.it/rmydownload.php?filename=cnr.ismar/cnr.ismar.an/2008-A0-009/2008-A0-009.pdf |
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 |
In: Antarctic Science, vol. 20 (4) pp. 355 - 364. Cambridge Univ Press, 2008. |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/274110/EU/Mining for new antimicrobials in ant associated actinomycetes/ANT info:eu-repo/semantics/altIdentifier/issn/0954-1020 info:eu-repo/semantics/altIdentifier/doi/10.1017/S095410200800103X |
op_rights |
info:eu-repo/semantics/restrictedAccess |
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 |
_version_ |
1766101819882209280 |