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Marine Ecology Progress Series

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MEPS 515:239-250 (2014)  -  DOI:

Life-history and activity shape catchability in a sedentary fish

David Villegas-Ríos1,6,*, Josep Alós2, Miquel Palmer3, Susan K. Lowerre-Barbieri4, Rafael Bañón5, Alexandre Alonso-Fernández1, Fran Saborido-Rey1

1Instituto de Investigacións Mariñas (IIM-CSIC), 36208 Vigo, Spain
2Department of Biology and Ecology of Fishes, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Müggelseedamm 310, 12587 Berlin, Germany
3Instituto Mediterráneo de Estudios Avanzados (CSIC-UIB), 07190 Esporles, Spain
4Florida Fish and Wildlife Conservation Commission, Florida Fish and Wildlife Research Institute, St. Petersburg,
33711 Florida, USA
5Servizo de Planificación, Dirección Xeral de Desenvolvemento Pesqueiro, Consellería do Mar e Medio Rural (Xunta de Galicia), 15701 Santiago de Compostela, Spain
6Present address: Flødevigen Marine Research Station, Institute of Marine Research (IMR), 4817 His, Norway
*Corresponding author:

ABSTRACT: Catchability, a key parameter in stock assessment, is often considered constant in time and space. However, when fishing with passive gears like traps or gillnets, fish behavior determines the odds of encounter with the fishers and thus catchability. Few studies have presented comprehensive empirical evidence of the link between behavior measured in the wild and catchability from a life-history strategy perspective. Here, a suite of different variables, including environmental cues, physiological states, fish activity, home range and catchability, were modeled using a sinusoidal function to describe their seasonality over the year and the degree of coupling among them in a sedentary coastal fish (Labrus bergylta). All the variables except the home range size showed a significant variation over the year, following a sinusoidal pattern. The models showed a tight match between the seasonality of catchability and fish activity, with high values of both variables occurring in late spring to early summer, when the highest levels of feeding and the period of reproductive inactivity occurred. Lower catchability values were predicted in late autumn to early winter, coinciding with the spawning season and the associated reduced activity. This integrative research shows that the spatio-temporal dimension of fish life-history strategy has a key role in shaping catchability even in highly sedentary species. Time-varying catchability needs to be incorporated into stock assessment models that aim to accurately describe fish population health and to estimate abundance indices.

KEY WORDS: Feeding · Fish activity · Home range · Movement ecology · Reproduction · Seasonality · Sedentary fish · Vulnerability

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Cite this article as: Villegas-Ríos D, Alós J, Palmer M, Lowerre-Barbieri SK, Bañón R, Alonso-Fernández A, Saborido-Rey F (2014) Life-history and activity shape catchability in a sedentary fish. Mar Ecol Prog Ser 515:239-250.

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