Year-round distribution of white-chinned petrels from South Georgia: Relationships with oceanography and fisheries

Phillips, Richard A.; Silk, Janet R. D.; Croxall, John P.; Afanasyev, Vsevolod

doi:10.1016/j.biocon.2005.10.046

Cited by 238 publications

(225 citation statements)

References 41 publications

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“…Several studies have documented significant overlap, at various scales, between fishing fleets and the foraging ranges of marine predators (Hyrenbach and Dotson, 2003;Phillips et al, 2006), but without suggesting a causal relationship. If the presence of fishing fleets influences the at-sea distribution of predators (particularly those that regularly scavenge behind vessels), efforts to identify areas of special conservation significance might be to a certain extent compromised.…”

Section: Fisheriesmentioning

confidence: 99%

“…Whatever the relationship, fishing vessel distribution needs to be taken into account. Most studies so far have examined this issue at coarse spatial and temporal scales (Xavier et al, 2004;Phillips et al, 2006;Weimerskirch et al, 2010, but see Peterson et al, 2008;Votier et al, 2010;Granadeiro et al, 2011 for important exceptions) and more work is needed in this area.…”

Section: Introductionmentioning

confidence: 99%

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Predicting the distribution of a threatened albatross: The importance of competition, fisheries and annual variability

Catry

Lemos

Brickle

et al. 2013

Progress in Oceanography

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a b s t r a c tThe ability to predict the distribution of threatened marine predators is essential to inform spatially explicit seascape management. We tracked 99 individual black-browed albatrosses Thalassarche melanophris from two Falkland Islands' colonies in 2 years. We modeled the observed distribution of foraging activity taking environmental variables, fisheries activity (derived from vessel monitoring system data), accessibility to feeding grounds and intra-specific competition into account. The resulting models had sufficient generality to make reasonable predictions for different years and colonies, which allows temporal and spatial variation to be incorporated into the decision making process by managers for regions and seasons where available information is incomplete. We also illustrated that long-ranging birds from colonies separated by as little as 75 km can show important spatial segregation at sea, invalidating direct or uncorrected extrapolation from one colony to neighboring ones. Fisheries had limited influence on albatross distribution, despite the well known scavenging behavior of these birds. The models developed here have potentially wide application to the identification of sensitive geographical areas where special management practices (such as fisheries closures) could be implemented, and would predict how these areas are likely to move with annual and seasonal changes in environmental conditions.

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Section: Fisheriesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Predicting the distribution of a threatened albatross: The importance of competition, fisheries and annual variability

Catry

Lemos

Brickle

et al. 2013

Progress in Oceanography

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“…No birds returned to their colonies during winter, all remaining continuously at sea until September/October, a period of approximately 7 months after the end of the moult in February/March. The large variation in dispersal distance during this period may reflect differences in extrinsic influences, in particular the speed and direction of ice advance in that region, or intrinsic factors such as age, quality or preferences of individuals (Phillips et al 2005(Phillips et al , 2006. We found that penguins travelled more slowly whilst moving through sea ice than when travelling through open water.…”

Section: Discussionmentioning

confidence: 71%

Post-breeding dispersal of Adélie penguins (Pygoscelis adeliae) nesting at Signy Island, South Orkney Islands

2010

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ARGOS satellite telemetry and Global Location Sensors (geolocators) were used to identify the moult locations and the winter foraging dispersal of Adélie penguins after they left their breeding colonies on Signy Island in the South Orkney Islands. Animals were tracked during the period December 2004 to October 2005. All birds displayed a similar pattern of migratory behaviour, remaining away from colonies for approximately 9 months, at distances of up to 2,235 km. Moult locations were within the pack ice. Mean daily travel speeds to the moult locations were significantly faster when moving through open water than through pack ice. Moult occurred during February/March within a narrow latitudinal range (65-71°S), at a mean distance of 126 km from the ice edge; the mean duration of individual moult was c. 18.6 days. After moult, penguins spent the subsequent winter months moving north or north-eastward within the expanding winter pack ice, at a mean distance of 216 km from the ice edge, and in areas with ice cover [80%. The penguins returned to the vicinity of their colony between September 26 and October 22, 2005. This dependence of Adélie penguins on sea ice habitat suggests that any further reductions in sea ice extent in the Weddell Sea region would potentially have important impacts on the population processes of this pagophilic species.

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“…Different habitat preferences were found in two closely related Procellaria petrels (Bugoni et al 2009). While spectacled petrels prefer warm, offshore and mesotrophic or oligotrophic waters of the southwest Atlantic Ocean, coastal cold and productive waters are used extensively by wintering whitechinned petrels (Phillips et al 2006), but were avoided by spectacled petrels (Bugoni et al 2009). Studies such as this should be followed up over several years to link with environmental variability and, more importantly, with global climate change.…”

Section: Impacts Of Climate Variation On South American Seabirds 347mentioning

confidence: 99%

“…Offshore fishing operations may provide food in the form of discards (Bugoni et al 2010), but also lead to incidental mortality of penguins, albatrosses, petrels, shearwaters and cormorants (e.g. Favero et al 2003;Phillips et al 2006;González-Zevallos & Yorio 2006;Bugoni et al 2008a;Jiménez et al 2009;Cardoso et al 2011) and to increased intake of heavy metals (Carvalho et al 2013). While some of these threats are locally restricted or could be remedied through political decisions, climatic phenomena have the potential to influence the whole region profoundly and add to the cumulative pressure affecting many seabird species.…”

Section: South American Large Marine Ecosystems and Climatementioning

confidence: 99%

Impacts of climate variation and potential effects of climate change on South American seabirds – a review

Quillfeldt

Masello

2013

Marine Biology Research

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The coastal and oceanic waters around the South American coasts provide rich foraging grounds for breeding and wintering seabirds, but there is growing concern that climate change will provide additional pressures to the seabirds around South America. As in many other coastal ecosystems, seabirds around South America are already faced with threats to their breeding habitats such as human disturbance and introduced predators, and threats at sea such as persistent pollutants and pesticides and direct mortality risks due to fisheries and oil spills. The sensitivity of South American marine ecosystems to ocean climate anomalies is well known from the dramatic population collapses caused by El Niñ o Southern Oscillation (ENSO) events. However, longer-term climate change effects have been explored less often and few long-term data sets exist for South American seabirds. Seven Large Marine Ecosystems (LME) border South America. While all LMEs experienced warming during the last 50 years, their climate dynamics have differed in recent decades. Climate models suggest that potential climate change effects may be important, especially due to changes in ENSO intensity and frequency and associated changes in the ocean climate of Atlantic and Pacific marine ecosystems. In this review, we found that the best studied seabird communities are those of the Patagonian Shelf and the Humboldt Current, but overall, our knowledge on climate effects on South American seabirds is scarce.

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Year-round distribution of white-chinned petrels from South Georgia: Relationships with oceanography and fisheries

Cited by 238 publications

References 41 publications

Predicting the distribution of a threatened albatross: The importance of competition, fisheries and annual variability

Predicting the distribution of a threatened albatross: The importance of competition, fisheries and annual variability

Post-breeding dispersal of Adélie penguins (Pygoscelis adeliae) nesting at Signy Island, South Orkney Islands

Impacts of climate variation and potential effects of climate change on South American seabirds – a review

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