2010
DOI: 10.1007/s10336-010-0577-x
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Sex-biased incidental mortality of albatrosses and petrels in longline fisheries: differential distributions at sea or differential access to baits mediated by sexual size dimorphism?

Abstract: . Sex-biased incidental mortality of albatrosses and petrels in longline fisheries: differential distributions at sea or differential access to baits mediated by sexual size dimorphism?. Journal für Ornithologie = Journal of Ornithology, Springer Verlag, 2010, 152 (2) AbstractSkewed Adult Sex Ratio (ASR) has been proposed as a common pattern in birds, frequently biased towards males and with larger biases in globally threatened species. In albatrosses and petrels, it has been suggested that differential mort… Show more

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Cited by 45 publications
(32 citation statements)
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“…The present analysis cannot exclude such possibility, but a recent review on the subject did not suggest adult females to be more susceptible to bycatch in fisheries (Bugoni et al 2010). In fact, the lower survival of New Island females is mostly related to the nonbreeder section of the population ( Table 4).…”
Section: Discussioncontrasting
confidence: 54%
“…The present analysis cannot exclude such possibility, but a recent review on the subject did not suggest adult females to be more susceptible to bycatch in fisheries (Bugoni et al 2010). In fact, the lower survival of New Island females is mostly related to the nonbreeder section of the population ( Table 4).…”
Section: Discussioncontrasting
confidence: 54%
“…Because, although females could be facing greater threats than males due to a closer migration to the coast and a major interaction with oil and fishing activities (Boersma ), the higher female/male mortality in winter grounds find by Vanstreels et al (), based on penguins found dead and alive ashore Brazilian coast, could be simply because more females are migrating near to the coast and in northern areas than males (Yamamoto et al ), and therefore are easier to find death stranded in beaches. Because of the sexual segregation at‐sea, the methodology used to conclude differential sex‐ratio mortality during migration may be skewed, as has been shown for other marine birds (Bugoni et al )…”
Section: Discussionmentioning
confidence: 99%
“…Despite the relatively small sample size of equipped birds, our study females consistently explored larger areas than males, which probably exposes them to a wider variety of threats (e.g. Bugoni et al 2010), such as by-catch, chronic oil spills or predation. Higher foraging effort while sampling a larger foraging area is certainly more energetically demanding on African penguin females.…”
Section: Behavioural Differences At Seamentioning
confidence: 99%
“…Gonzàlez-Solìs & Croxall 2005) or larger physical attributes. Dissimilarities in foraging behaviour between sexes can have crucial implications for conservation, exposing males and females to different threats, notably as by-catch in fisheries (Bugoni et al 2010), which can induce differential mortality rates, and skewed sex ratios in populations (Ryan & BoixHinzen 1999). Such sex-biased mortality has serious long-term consequences for fecundity and population growth rate of these long-lived birds (Mills & Ryan 2005), and could eventually lead to the extinction of small populations (Dale 2001).…”
Section: Introductionmentioning
confidence: 99%