Temporal and geographic variability of sardine maturity at length in the northeastern Atlantic and the western Mediterranean
Abstract We investigate spatial and temporal variations in sardine maturation patterns and discuss the implications for stock structure, using recent samples collected opportunistically across the species range and data collected regularly for the assessment of the Atlanto-Iberian stock. Maturity og...
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croxfordunivpr:10.1016/j.icesjms.2006.01.005 2024-05-12T08:08:44+00:00 Temporal and geographic variability of sardine maturity at length in the northeastern Atlantic and the western Mediterranean Silva, A. Santos, M.B. Caneco, B. Pestana, G. Porteiro, C. Carrera, P. Stratoudakis, Y. 2006 http://dx.doi.org/10.1016/j.icesjms.2006.01.005 http://academic.oup.com/icesjms/article-pdf/63/4/663/29124824/63-4-663.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 63, issue 4, page 663-676 ISSN 1095-9289 1054-3139 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2006 croxfordunivpr https://doi.org/10.1016/j.icesjms.2006.01.005 2024-04-18T08:15:12Z Abstract We investigate spatial and temporal variations in sardine maturation patterns and discuss the implications for stock structure, using recent samples collected opportunistically across the species range and data collected regularly for the assessment of the Atlanto-Iberian stock. Maturity ogives were fitted to maturity-at-length data using Generalized Linear Models, and maturation patterns are summarized by length at first maturity (L50). Sardine attain sexual maturity at a total length of 10.9–16.8 cm. The percentage of mature small sardine increases from north to south across the Northeast Atlantic. L50 is low in the Mediterranean and Moroccan waters, but maturation is delayed towards the limits of the species' range. Sardine mature smaller in the Gulf of Cadiz than in other areas of the Atlanto-Iberian stock, although there is no indication of a different maturation pattern north of the stock boundary. These results are not sufficient to review the stock structure of sardine, but question the hypothesis of homogeneous biological properties of sardine populations within the stock area. Sardine maturation length reduced and the spawning period extended in western Iberia during the past two decades. Associated increases in fish condition and fat reserves during the summer feeding season suggest that variations in reproductive traits may have been caused by environmentally driven changes in food availability. Article in Journal/Newspaper Northeast Atlantic Oxford University Press ICES Journal of Marine Science 63 4 663 676 |
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Open Polar |
collection |
Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography Silva, A. Santos, M.B. Caneco, B. Pestana, G. Porteiro, C. Carrera, P. Stratoudakis, Y. Temporal and geographic variability of sardine maturity at length in the northeastern Atlantic and the western Mediterranean |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract We investigate spatial and temporal variations in sardine maturation patterns and discuss the implications for stock structure, using recent samples collected opportunistically across the species range and data collected regularly for the assessment of the Atlanto-Iberian stock. Maturity ogives were fitted to maturity-at-length data using Generalized Linear Models, and maturation patterns are summarized by length at first maturity (L50). Sardine attain sexual maturity at a total length of 10.9–16.8 cm. The percentage of mature small sardine increases from north to south across the Northeast Atlantic. L50 is low in the Mediterranean and Moroccan waters, but maturation is delayed towards the limits of the species' range. Sardine mature smaller in the Gulf of Cadiz than in other areas of the Atlanto-Iberian stock, although there is no indication of a different maturation pattern north of the stock boundary. These results are not sufficient to review the stock structure of sardine, but question the hypothesis of homogeneous biological properties of sardine populations within the stock area. Sardine maturation length reduced and the spawning period extended in western Iberia during the past two decades. Associated increases in fish condition and fat reserves during the summer feeding season suggest that variations in reproductive traits may have been caused by environmentally driven changes in food availability. |
format |
Article in Journal/Newspaper |
author |
Silva, A. Santos, M.B. Caneco, B. Pestana, G. Porteiro, C. Carrera, P. Stratoudakis, Y. |
author_facet |
Silva, A. Santos, M.B. Caneco, B. Pestana, G. Porteiro, C. Carrera, P. Stratoudakis, Y. |
author_sort |
Silva, A. |
title |
Temporal and geographic variability of sardine maturity at length in the northeastern Atlantic and the western Mediterranean |
title_short |
Temporal and geographic variability of sardine maturity at length in the northeastern Atlantic and the western Mediterranean |
title_full |
Temporal and geographic variability of sardine maturity at length in the northeastern Atlantic and the western Mediterranean |
title_fullStr |
Temporal and geographic variability of sardine maturity at length in the northeastern Atlantic and the western Mediterranean |
title_full_unstemmed |
Temporal and geographic variability of sardine maturity at length in the northeastern Atlantic and the western Mediterranean |
title_sort |
temporal and geographic variability of sardine maturity at length in the northeastern atlantic and the western mediterranean |
publisher |
Oxford University Press (OUP) |
publishDate |
2006 |
url |
http://dx.doi.org/10.1016/j.icesjms.2006.01.005 http://academic.oup.com/icesjms/article-pdf/63/4/663/29124824/63-4-663.pdf |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
ICES Journal of Marine Science volume 63, issue 4, page 663-676 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1016/j.icesjms.2006.01.005 |
container_title |
ICES Journal of Marine Science |
container_volume |
63 |
container_issue |
4 |
container_start_page |
663 |
op_container_end_page |
676 |
_version_ |
1798851848250064896 |