2008
DOI: 10.2989/ajms.2008.30.1.18.468
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Implications for seabirds off South Africa of a long-term change in the distribution of sardine

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Cited by 68 publications
(57 citation statements)
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“…In western Greenland, great cormorants showed a high foraging efficiency in an environment with low prey abundance (Gremillet et al 2004). GPS-tracked cape gannets from the South African Atlantic coast appeared restricted to an area of the Benguela current system that no longer supports high anchovies and sardines, due to a recent regime shift, which resulted in poor foraging success and a marked decline in population (Crawford et al 2008a). This was attributed to the inability of seabirds with a limited foraging range to track the large scale movement of their prey (Gremillet et al 2008).…”
Section: Discussionmentioning
confidence: 99%
“…In western Greenland, great cormorants showed a high foraging efficiency in an environment with low prey abundance (Gremillet et al 2004). GPS-tracked cape gannets from the South African Atlantic coast appeared restricted to an area of the Benguela current system that no longer supports high anchovies and sardines, due to a recent regime shift, which resulted in poor foraging success and a marked decline in population (Crawford et al 2008a). This was attributed to the inability of seabirds with a limited foraging range to track the large scale movement of their prey (Gremillet et al 2008).…”
Section: Discussionmentioning
confidence: 99%
“…A change in prey availability may influence the decision to breed and can play a major role in breeding success, can affect survival and can influence inter-colony movements (Crawford & Dyer 1995, Crawford et al 2008a. Consequently, the change in the distribution of sardine and anchovy is thought to be largely responsible for the changes observed in the gannet colonies.…”
Section: Resale or Republication Not Permitted Without Written Consenmentioning
confidence: 99%
“…The combination of these 2 factors can have severe consequences on seabird populations, yet it is often difficult to disentangle their effects (Frederiksen et al 2004, Rolland et al 2008, Gremillet & Boulinier 2009, Rolland et al 2010. It is believed that the spatial shift in the distribution of sardine and anchovy in the southern Benguela system was caused by such a combination of factors (Gremillet et al 2008a, Gremillet & Boulinier 2009 and could indicate an ecological regime shift that is likely to have significant consequences for the local marine ecosystem (Gremillet et al 2008a).The change in the abundance of prey can have a substantial, rapid effect on predators like the Cape gannet, whose mobility is limited while rearing young and who display strong site fidelity tendencies (Crawford 2007, Crawford et al 2008a, Durant et al 2009. A change in prey availability may influence the decision to breed and can play a major role in breeding success, can affect survival and can influence inter-colony movements (Crawford & Dyer 1995, Crawford et al 2008a.…”
mentioning
confidence: 99%
“…Among many examples are sandeels (or sandlance; Ammodytes spp.) in the North Sea (Monaghan et al 1989;Frederiksen et al 2008;Cook et al 2014) and Gulf of Alaska Suryan et al 2006); capelin (Mallotus villosus) around Newfoundland and Labrador (Montevecchi and Myers 1996;Regehr and Montevecchi 1997), the Barents Sea (Barrett and Furness 1990), and Gulf of Alaska ; anchovy and sardines in the Benguela Current (Crawford et al 2008; Green et al 2015), the Humboldt Current (Duffy 1983), and California Current (Mills et al 2007;Sydeman et al 2009; Thompson et al 2012); and Atlantic herring in Iceland, Norway (Anker-Nilssen 1987), and the Gulf of Maine (Diamond and Devlin 2003;Breton and Diamond 2014).…”
Section: Introductionmentioning
confidence: 99%