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Adult-mediated connectivity and spatial population structure of sardine in the Bay of Biscay and Iberian coast ArchiMer
Silva, Alexandra; Garrido, Susana; Ibaibarriaga, Leire; Pawlowski, Lionel; Riveiro, Isabel; Marques, Vitor; Ramos, Fernando; Duhamel, Erwan; Iglesias, Magdalena; Bryere, Philippe; Mangin, Antoine; Citores, Leire; Carrera, Pablo; Uriarte, Andres.
This work investigated adult-mediated connectivity and spatial population structure of sardine in the European Atlantic waters. The spatial and temporal progress of cohorts was modelled using abundance-at-age survey data by area in the period 2000 to 2016, covering the region from the northern Bay of Biscay to the eastern Gulf of Cadiz. A novel methodology was used to calculate indices of cohort movement between areas. Movement was relatively low between three large regions, the Bay of Biscay, the northern Spanish and Portuguese waters and the Gulf of Cadiz, each hosting a recruitment hotspot. On the other hand, one half of the sardines recruited in North Portugal and a quarter of those recruited in Southwest Portugal moved to northern Spanish waters and...
Tipo: Text Palavras-chave: Metapopulation; Source-sink dynamics; Adult-mediated connectivity; Cohort dispersal; Small pelagic fishes; Stock identity; Fisheries management.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00465/57661/59856.pdf
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Ecology - Managing evolving fish stocks ArchiMer
Jorgensen, Christian; Enberg, Katja; Dunlop, Erin S.; Arlinghaus, Robert; Boukal, David S.; Brander, Keith; Ernande, Bruno; Gardmark, Anna; Johnston, Fiona; Matsumura, Shuichi; Pardoe, Heidi; Raab, Kristina; Silva, Alexandra; Vainikka, Anssi; Dieckmann, Ulf; Heino, Mikko; Rijnsdorp, Adriaan D..
Evolutionary impact assessment is introduced as a framework for quantifying the effects of 29 harvest-induced evolution on the utility generated by fish stocks.
Tipo: Text
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3302.pdf
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Research for Pech Committee - Sardine fisheries: Resource Assessment and Social and Economic situation ArchiMer
Silva, Alexandra; Moreno, Ana; Riveiro, Isabel; Santos, Begoña; Pita, Cristina; Garcia Rodrigues, Joao; Villasante, Sebastian; Pawlowski, Lionel; Duhamel, Erwan.
This study describes fisheries, stock status, ICES advice and management measures for the Northern and Southern sardine stocks in EU Atlantic waters. Information on sardine biology and ecology is provided for a better understanding of stock development. Social and economic dimensions are addressed for sardine fisheries in France, Spain and Portugal. The study provides recommendations to improve knowledge on the species and indicates management measures which might be considered for the sustainability of the fisheries.
Tipo: Text
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00300/41109/40280.pdf
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Testing spatial heterogeneity with stock assessment models ArchiMer
Jardim, Ernesto; Eero, Margit; Silva, Alexandra; Ulrich, Clara; Pawlowski, Lionel; Holmes, Steven J.; Ibaibarriaga, Leire; De Oliveir, Jose A. A. A.; Riveiro, Isabel; Alzorriz, Nekane; Citores, Leire; Scott, Finlay; Uriarte, Andres; Carrera, Pablo; Duhamel, Erwan; Mosqueira, Iago.
This paper describes a methodology that combines meta-population theory and stock assessment models to gain insights about spatial heterogeneity of the meta-population in an operational time frame. The methodology was tested with stochastic simulations for different degrees of connectivity between sub-populations and applied to two case studies, North Sea cod (Gadus morua) and Northeast Atlantic sardine (Sardina pilchardus). Considering that the biological components of a population can be partitioned into discrete spatial units, we extended this idea into a property of additivity of sub-population abundances. If the additivity results hold true for putative sub-populations, then assessment results based on sub-populations will provide information to...
Tipo: Text
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00422/53385/54236.pdf
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