Temporal and geographic variability of sardine maturity at length in the northeastern Atlantic and the western Mediterranean
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...
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ftcsic:oai:digital.csic.es:10261/329192 2024-02-11T10:07:00+01:00 Temporal and geographic variability of sardine maturity at length in the northeastern Atlantic and the western Mediterranean Silva, Alexandra Santos, María Begoña Caneco, Bruno Pestana, Graça Porteiro-Lago, Carmen Carrera, Pablo Stratoudakis, Yorgos Atlantic Ocean Eastern Atlantic Northeast Atlantic Iberian waters 2006 http://hdl.handle.net/10508/8849 http://hdl.handle.net/10261/329192 https://doi.org/10.1016/j.icesjms.2006.01.005 en eng Centro Oceanográfico de Vigo VoR http://icesjms.oxfordjournals.org/content/63/4/663.full ICES Journal Of Marine Science, 63. 2006: 663-676 1054-3139 http://hdl.handle.net/10508/8849 http://hdl.handle.net/10261/329192 doi:10.1016/j.icesjms.2006.01.005 20632 open Pesquerías Centro Oceanográfico de Vigo Condition Iberian waters Maturity at length Sardine Stock structure research article 2006 ftcsic https://doi.org/10.1016/j.icesjms.2006.01.005 2024-01-16T11:49:41Z 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 10.9e16.8 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. SI Article in Journal/Newspaper Northeast Atlantic Digital.CSIC (Spanish National Research Council) ICES Journal of Marine Science 63 4 663 676 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Pesquerías Centro Oceanográfico de Vigo Condition Iberian waters Maturity at length Sardine Stock structure |
spellingShingle |
Pesquerías Centro Oceanográfico de Vigo Condition Iberian waters Maturity at length Sardine Stock structure Silva, Alexandra Santos, María Begoña Caneco, Bruno Pestana, Graça Porteiro-Lago, Carmen Carrera, Pablo Stratoudakis, Yorgos Temporal and geographic variability of sardine maturity at length in the northeastern Atlantic and the western Mediterranean |
topic_facet |
Pesquerías Centro Oceanográfico de Vigo Condition Iberian waters Maturity at length Sardine Stock structure |
description |
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 10.9e16.8 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. SI |
format |
Article in Journal/Newspaper |
author |
Silva, Alexandra Santos, María Begoña Caneco, Bruno Pestana, Graça Porteiro-Lago, Carmen Carrera, Pablo Stratoudakis, Yorgos |
author_facet |
Silva, Alexandra Santos, María Begoña Caneco, Bruno Pestana, Graça Porteiro-Lago, Carmen Carrera, Pablo Stratoudakis, Yorgos |
author_sort |
Silva, Alexandra |
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 |
publishDate |
2006 |
url |
http://hdl.handle.net/10508/8849 http://hdl.handle.net/10261/329192 https://doi.org/10.1016/j.icesjms.2006.01.005 |
op_coverage |
Atlantic Ocean Eastern Atlantic Northeast Atlantic Iberian waters |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_relation |
Centro Oceanográfico de Vigo VoR http://icesjms.oxfordjournals.org/content/63/4/663.full ICES Journal Of Marine Science, 63. 2006: 663-676 1054-3139 http://hdl.handle.net/10508/8849 http://hdl.handle.net/10261/329192 doi:10.1016/j.icesjms.2006.01.005 20632 |
op_rights |
open |
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_ |
1790605086067523584 |