Estimating natural mortality and egg production of snow crab Chionoecetes opilio adult females
Natural mortality rate is a key parameter in ecology and fisheries, but it may be difficult to estimate for methodological reasons and because it is highly variable and often confounded with other factors such as fishing mortality and migration. This is especially true for crustaceans in general, be...
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ftcemoa:oai:irsteadoc.irstea.fr:PUB00038638 2023-05-15T15:54:07+02:00 Estimating natural mortality and egg production of snow crab Chionoecetes opilio adult females Drouineau, H. Sainte Marie, B. Duplisea, D. IRSTEA BORDEAUX UR EPBX FRA PECHES ET OCEANS CANADA MONT JOLI CAN 2013 application/pdf https://irsteadoc.irstea.fr/cemoa/PUB00038638 Anglais eng http://dx.doi.org/10.3354/ab00513 https://irsteadoc.irstea.fr/cemoa/PUB00038638 Date de dépôt: 2013-06-26 - Tous les documents et informations contenus dans la base CemOA Publications sont protégés en vertu du droit de propriété intellectuelle, en particulier par le droit d'auteur. La personne consultant la base CemOA Publications peut visualiser, reproduire, ou stocker des copies des publications, à condition que l'information soit seulement pour son usage personnel et non commercial. L'utilisation des travaux universitaires est soumise à autorisation préalable de leurs auteurs. Toute information relative au signalement d'une publication contenue dans CemOA Publications doit inclure la citation bibliographique usuelle : Nom du ou des auteurs, titre et source du document, date et URL de la notice (dc_identifier). 31867 PREDICTION DE LA MORTALITE OEUF TAILLE CRUSTACE CHIONOECETES OPILIO NATURAL MORTALITY BODY SIZE EGG PRODUCTION TERMINAL MOLT EGGS PRUNING Article de revue scientifique à comité de lecture 2013 ftcemoa https://doi.org/10.3354/ab00513 2021-06-29T10:23:55Z Natural mortality rate is a key parameter in ecology and fisheries, but it may be difficult to estimate for methodological reasons and because it is highly variable and often confounded with other factors such as fishing mortality and migration. This is especially true for crustaceans in general, because age determination is problematic, and for snow crab (Chionoecetes opilio) in particular because density-dependent processes may lead to highly variable mortality rates across life history stages. In this context, we developed an original method to estimate the natural mortality rate of adult (i.e. terminally molted) female snow crab, and its consequences on egg production. This new method relies on shell condition, carapace width and abundance of adult females and was applied to a time series (1991-2012) of annual trawl survey data for a snow crab population in the Gulf of St. Lawrence, eastern Canada. Two natural mortality estimates were provided by the method depending on two distinct assumptions about the survey. Both estimates (0.66 and 0.78 year-1) were high compared to previous estimates for snow crab. These values imply that female life expectancy after terminal molt was short and that primiparous females (first-time spawners) contributed a large share (at least 81%) of the total number of eggs produced by the case-study population over the period 1992-2010. Article in Journal/Newspaper Chionoecetes opilio Snow crab Irstea Publications et Bases documentaires (Irstea@doc/CemOA) Canada Aquatic Biology 18 3 261 270 |
institution |
Open Polar |
collection |
Irstea Publications et Bases documentaires (Irstea@doc/CemOA) |
op_collection_id |
ftcemoa |
language |
English |
topic |
PREDICTION DE LA MORTALITE OEUF TAILLE CRUSTACE CHIONOECETES OPILIO NATURAL MORTALITY BODY SIZE EGG PRODUCTION TERMINAL MOLT EGGS PRUNING |
spellingShingle |
PREDICTION DE LA MORTALITE OEUF TAILLE CRUSTACE CHIONOECETES OPILIO NATURAL MORTALITY BODY SIZE EGG PRODUCTION TERMINAL MOLT EGGS PRUNING Drouineau, H. Sainte Marie, B. Duplisea, D. Estimating natural mortality and egg production of snow crab Chionoecetes opilio adult females |
topic_facet |
PREDICTION DE LA MORTALITE OEUF TAILLE CRUSTACE CHIONOECETES OPILIO NATURAL MORTALITY BODY SIZE EGG PRODUCTION TERMINAL MOLT EGGS PRUNING |
description |
Natural mortality rate is a key parameter in ecology and fisheries, but it may be difficult to estimate for methodological reasons and because it is highly variable and often confounded with other factors such as fishing mortality and migration. This is especially true for crustaceans in general, because age determination is problematic, and for snow crab (Chionoecetes opilio) in particular because density-dependent processes may lead to highly variable mortality rates across life history stages. In this context, we developed an original method to estimate the natural mortality rate of adult (i.e. terminally molted) female snow crab, and its consequences on egg production. This new method relies on shell condition, carapace width and abundance of adult females and was applied to a time series (1991-2012) of annual trawl survey data for a snow crab population in the Gulf of St. Lawrence, eastern Canada. Two natural mortality estimates were provided by the method depending on two distinct assumptions about the survey. Both estimates (0.66 and 0.78 year-1) were high compared to previous estimates for snow crab. These values imply that female life expectancy after terminal molt was short and that primiparous females (first-time spawners) contributed a large share (at least 81%) of the total number of eggs produced by the case-study population over the period 1992-2010. |
author2 |
IRSTEA BORDEAUX UR EPBX FRA PECHES ET OCEANS CANADA MONT JOLI CAN |
format |
Article in Journal/Newspaper |
author |
Drouineau, H. Sainte Marie, B. Duplisea, D. |
author_facet |
Drouineau, H. Sainte Marie, B. Duplisea, D. |
author_sort |
Drouineau, H. |
title |
Estimating natural mortality and egg production of snow crab Chionoecetes opilio adult females |
title_short |
Estimating natural mortality and egg production of snow crab Chionoecetes opilio adult females |
title_full |
Estimating natural mortality and egg production of snow crab Chionoecetes opilio adult females |
title_fullStr |
Estimating natural mortality and egg production of snow crab Chionoecetes opilio adult females |
title_full_unstemmed |
Estimating natural mortality and egg production of snow crab Chionoecetes opilio adult females |
title_sort |
estimating natural mortality and egg production of snow crab chionoecetes opilio adult females |
publishDate |
2013 |
url |
https://irsteadoc.irstea.fr/cemoa/PUB00038638 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Chionoecetes opilio Snow crab |
genre_facet |
Chionoecetes opilio Snow crab |
op_source |
31867 |
op_relation |
http://dx.doi.org/10.3354/ab00513 https://irsteadoc.irstea.fr/cemoa/PUB00038638 |
op_rights |
Date de dépôt: 2013-06-26 - Tous les documents et informations contenus dans la base CemOA Publications sont protégés en vertu du droit de propriété intellectuelle, en particulier par le droit d'auteur. La personne consultant la base CemOA Publications peut visualiser, reproduire, ou stocker des copies des publications, à condition que l'information soit seulement pour son usage personnel et non commercial. L'utilisation des travaux universitaires est soumise à autorisation préalable de leurs auteurs. Toute information relative au signalement d'une publication contenue dans CemOA Publications doit inclure la citation bibliographique usuelle : Nom du ou des auteurs, titre et source du document, date et URL de la notice (dc_identifier). |
op_doi |
https://doi.org/10.3354/ab00513 |
container_title |
Aquatic Biology |
container_volume |
18 |
container_issue |
3 |
container_start_page |
261 |
op_container_end_page |
270 |
_version_ |
1766389298243829760 |