Early life history traits of Trematomus scotti in the Bransfield Strait
Abstract Early life history traits of the blackfin notothen, Trematomus scotti , were investigated through otolith microincrement pattern and stomach content analyses. Post-larval specimens of 12–20 mm standard length (SL) were collected in the Bransfield Strait and adjacent waters during the 2010–1...
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crcambridgeupr:10.1017/s0954102015000280 2024-03-03T08:39:25+00:00 Early life history traits of Trematomus scotti in the Bransfield Strait La Mesa, Mario Catalano, Barbara Jones, Christopher D. 2015 http://dx.doi.org/10.1017/s0954102015000280 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102015000280 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 27, issue 6, page 535-542 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2015 crcambridgeupr https://doi.org/10.1017/s0954102015000280 2024-02-08T08:29:55Z Abstract Early life history traits of the blackfin notothen, Trematomus scotti , were investigated through otolith microincrement pattern and stomach content analyses. Post-larval specimens of 12–20 mm standard length (SL) were collected in the Bransfield Strait and adjacent waters during the 2010–11 summer. Catches were unevenly distributed across the surveyed area, yielding a relative abundance of 0.3–3.6 specimens per 1000 m 3 of filtered sea water. Age estimates ranged from 34 to 67 days, with good consistency and no apparent bias between readings. Based on an exponential model fitted to the age-length dataset, the growth rate was 0.17 mm day -1 , corresponding to a daily percentage increment in size of 1.07% SL. In agreement with previous studies, larval hatching occurred at a mean size of 9.0 mm and was spread over a relatively short period, lasting from late December to late January. Prey composition consisted exclusively of copepods, mainly larval stages of copepodites. Feeding intensity ranged from 1–14 prey items per stomach, being positively correlated with larval fish size. In summary, T. scotti shares a common early life history strategy with several other notothenioids, consisting of small larvae hatching in summer and overwintering as pelagic early juveniles until the following summer season. Article in Journal/Newspaper Antarctic Science Bransfield Strait Copepods Cambridge University Press Bransfield Strait Antarctic Science 27 6 535 542 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography La Mesa, Mario Catalano, Barbara Jones, Christopher D. Early life history traits of Trematomus scotti in the Bransfield Strait |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Early life history traits of the blackfin notothen, Trematomus scotti , were investigated through otolith microincrement pattern and stomach content analyses. Post-larval specimens of 12–20 mm standard length (SL) were collected in the Bransfield Strait and adjacent waters during the 2010–11 summer. Catches were unevenly distributed across the surveyed area, yielding a relative abundance of 0.3–3.6 specimens per 1000 m 3 of filtered sea water. Age estimates ranged from 34 to 67 days, with good consistency and no apparent bias between readings. Based on an exponential model fitted to the age-length dataset, the growth rate was 0.17 mm day -1 , corresponding to a daily percentage increment in size of 1.07% SL. In agreement with previous studies, larval hatching occurred at a mean size of 9.0 mm and was spread over a relatively short period, lasting from late December to late January. Prey composition consisted exclusively of copepods, mainly larval stages of copepodites. Feeding intensity ranged from 1–14 prey items per stomach, being positively correlated with larval fish size. In summary, T. scotti shares a common early life history strategy with several other notothenioids, consisting of small larvae hatching in summer and overwintering as pelagic early juveniles until the following summer season. |
format |
Article in Journal/Newspaper |
author |
La Mesa, Mario Catalano, Barbara Jones, Christopher D. |
author_facet |
La Mesa, Mario Catalano, Barbara Jones, Christopher D. |
author_sort |
La Mesa, Mario |
title |
Early life history traits of Trematomus scotti in the Bransfield Strait |
title_short |
Early life history traits of Trematomus scotti in the Bransfield Strait |
title_full |
Early life history traits of Trematomus scotti in the Bransfield Strait |
title_fullStr |
Early life history traits of Trematomus scotti in the Bransfield Strait |
title_full_unstemmed |
Early life history traits of Trematomus scotti in the Bransfield Strait |
title_sort |
early life history traits of trematomus scotti in the bransfield strait |
publisher |
Cambridge University Press (CUP) |
publishDate |
2015 |
url |
http://dx.doi.org/10.1017/s0954102015000280 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102015000280 |
geographic |
Bransfield Strait |
geographic_facet |
Bransfield Strait |
genre |
Antarctic Science Bransfield Strait Copepods |
genre_facet |
Antarctic Science Bransfield Strait Copepods |
op_source |
Antarctic Science volume 27, issue 6, page 535-542 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102015000280 |
container_title |
Antarctic Science |
container_volume |
27 |
container_issue |
6 |
container_start_page |
535 |
op_container_end_page |
542 |
_version_ |
1792494936777555968 |