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Fisheries bycatch as an inadvertent human-induced evolutionary mechanism


Barbraud, C and Tuck, GN and Thomson, R and Delord, K and Weimerskirch, H, Fisheries bycatch as an inadvertent human-induced evolutionary mechanism, PLoS One, 8, (4) Article e60353. ISSN 1932-6203 (2013) [Refereed Article]


Copyright Statement

Copyright 2013 Barbraud et al. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0)

DOI: doi:10.1371/journal.pone.0060353


Selective harvesting of animals by humans can affect the sustainability and genetics of their wild populations. Bycatch - the accidental catch of non-target species - spans the spectrum of marine fauna and constitutes a harvesting pressure. Individual differences in attraction to fishing vessels and consequent susceptibility to bycatch exist, but few studies integrate this individual heterogeneity with demography. Here, we tested for the evidence and consequences of individual heterogeneity on the demography of the wandering albatross, a seabird heavily affected by fisheries bycatch. We found strong evidence for heterogeneity in survival with one group of individuals having a 5.2% lower annual survival probability than another group, and a decrease in the proportion of those individuals with the lowest survival in the population coinciding with a 7.5 fold increase in fishing effort in the foraging areas. Potential causes for the heterogeneity in survival are discussed and we suggest that bycatch removed a large proportion of individuals attracted by fishing vessels and had significant phenotypic and population consequences.

Item Details

Item Type:Refereed Article
Keywords:fisheries bycatch, evolutionary mechanism, sustainability
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Fisheries sciences
Research Field:Fisheries management
Objective Division:Environmental Management
Objective Group:Marine systems and management
Objective Field:Marine biodiversity
UTAS Author:Tuck, GN (Dr Geoffrey Tuck)
ID Code:119526
Year Published:2013
Web of Science® Times Cited:28
Deposited By:Fisheries and Aquaculture
Deposited On:2017-08-02
Last Modified:2017-09-21
Downloads:123 View Download Statistics

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