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- W2401707942 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 542:141-151 (2016) - DOI: https://doi.org/10.3354/meps11559 North Sea saithe Pollachius virens growth in relation to food availability, density dependence and temperature Xochitl Cormon1,*, Bruno Ernande1, Alexander Kempf2, Youen Vermard3, Paul Marchal1 1IFREMER, Channel and North Sea Fisheries Research Unit, 150 Quai Gambetta, BP 699, 62321 Boulogne-sur-Mer, France 2Thünen Institute of Sea Fisheries, Palmaille 9, 22767 Hamburg, Germany 3IFREMER, Unit of Fisheries Ecology and Modelling, BP 21105, 44311 Nantes Cedex 03, France *Corresponding author: xochitl.cormon@ifremer.fr ABSTRACT: North Sea saithe Pollachius virens, a major top predator in the area, supports the fishery economy of several European countries. However, recent stock assessments suggested a decrease in spawning stock biomass along with a decline in saithe mean weight-at-ages. In this context, we investigated North Sea saithe growth characteristics at the population level. First, saithe annual weight increments and age-length relationships were studied. Modelling of saithe age-length relationships was carried out using (1) the traditional von Bertalanffy growth function model, (2) the Verhulst logistic model and (3) an empirical linear model. Second, the effects of environmental factors on saithe growth were investigated. Explanatory environmental factors included food availability, represented by the total biomass of Norway pout Trisopterus esmarkii; intraspecific competition, i.e. density dependence, represented by saithe abundance; and temperature. This study revealed that the Verhulst logistic model was the best descriptor of saithe growth and that density dependence and food availability had significant effects on the saithe growth coefficient, while no effect of temperature was shown. We suggest that reduced food availability and increased competition may explain the recent decrease in the saithe growth coefficient. KEY WORDS: Bottom-up processes · von Bertalanffy growth function · Logistic growth · Norway pout · Prey availability effects · Density-dependence · Predator-prey interactions · Resource limitation · Competition Full text in pdf format Supplementary material PreviousNextCite this article as: Cormon X, Ernande B, Kempf A, Vermard Y, Marchal P (2016) North Sea saithe Pollachius virens growth in relation to food availability, density dependence and temperature. Mar Ecol Prog Ser 542:141-151. https://doi.org/10.3354/meps11559 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 542. Online publication date: January 19, 2016 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2016 Inter-Research." @default.
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- W2401707942 title "North Sea saithe Pollachius virens growth in relation to food availability, density dependence and temperature" @default.
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