Status and distribution of wandering, black-browed and grey-headed albatrosses breeding at South Georgia

Poncet, Sally; Robertson, Graham; Phillips, Richard A.; Lawton, Kieran; Phalan, Ben; Trathan, Philip N.; Croxall, John P.

doi:10.1007/s00300-006-0114-9

Cited by 65 publications

(55 citation statements)

References 10 publications

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“…In this regard, the analysis should be repeated once the time series is augmented. The survival probabilities estimated by the present study (mean 0.942) are well within the range of those found for other black-browed albatross populations: 0.957 (pre-1998) and 0.901 (post-1988) at Bird Island, South Georgia (Arnold et al 2006), where the population is in rapid decline (Poncet et al 2006); 0.915 at Macquarie Island, for a population presumed to be stable (Terauds et al 2005); 0.917 for the mostly stable population sampled on Kerguelen (Rolland et al 2008). The closely related Campbell albatross T. (melanophris) impavida on Campbell Island showed a survival probability of 0.945 during a period of slow population increase (Waugh et al 1999).…”

Section: Discussionsupporting

confidence: 85%

“…Black-browed albatrosses Thalassarche melanophris are currently classified as globally endangered (IUCN 2008), and the main factor believed to be threatening their populations is accidental bycatch in several types of fisheries (Arnold et al 2006;Poncet et al 2006;Huin and Reid 2007). An estimated 67% of the global population of this albatross species nests on the Falkland Islands (ACAP 2009), and, hence, its global conservation is considerably dependent on the fate of this particular population.…”

Section: Introductionmentioning

confidence: 99%

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Demographic parameters of black-browed albatrosses Thalassarche melanophris from the Falkland Islands

2011

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Black-browed albatrosses Thalassarche melanophris are currently classified as globally endangered. The most important populations of this species are believed to be declining due to, amongst other factors, unsustainable levels of incidental mortality in fishing gear. However, detailed demographic data are lacking for several critical populations, including the largest of all, nesting in the Falkland Islands. Here, we present data from the first Falkland Islands detailed demographic study (at New Island) and show that, from 2003 to 2009, the mean adult survival probability was 0.942 (95% CI: 0.930-0.952). Nesting frequency of adults is amongst the highest recorded for Thalassarche albatrosses and breeding success (0.564 chicks per egg) is within normal values. The nesting population in the intensively studied plots experienced an increase of 4% per year from 2004 to 2009. These results indicate that the Falklands population may not be as threatened as previously supposed, although studies from more sites and a longer time series are needed to confirm or refute this. The high survival rates may partly reflect recent efforts to mitigate bycatch made by the Falkland Islands and other fisheries in the region. The reinforcement of such initiatives may be critical to buffer the black-browed albatross population against ecosystem shifts and natural disasters (such as harmful algal blooms) that will likely become more frequent with ongoing global changes.

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Section: Discussionsupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Demographic parameters of black-browed albatrosses Thalassarche melanophris from the Falkland Islands

2011

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“…Large southern-hemisphere procellariiform seabirds forage over thousands of km from the colony during the breeding season (Weimerskirch et al 1999, Phillips et al 2005a, and can move between ocean basins during the nonbreeding period (Croxall et al 2005, Phillips et al 2005b. Procellariiformes, however, include more threatened species than any other order of birds, with evidence for major, long-term declines particularly of populations in the Southern Ocean (Poncet et al 2006, Delord et al 2008, Croxall et al 2012. Knowledge of the distribution and behavior of breeding birds in relation to the marine environment has increased considerably in recent decades following the development of animal-borne electronic devices (Ropert-Coudert & Wilson 2005).…”

Section: Introductionmentioning

confidence: 99%

Stable isotopes document inter- and intra-specific variation in feeding ecology of nine large southern Procellariiformes

Jaeger¹,

Jaquemet²,

Phillips³

et al. 2013

Mar. Ecol. Prog. Ser.

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Investigating the foraging ecology of seabirds is especially challenging given their wide-ranging movements and the practical difficulties of obtaining unbiased information on their feeding behavior. Despite the development of animal-borne tracking devices, several limitations preclude investigations at the scale of a whole community in a given season or year, and, until recently, during the non-breeding period. Here we analyzed δ 13 C and δ 15 N in feathers of chicks and adults to investigate inter-and intra-specific variation in the foraging habitat and trophic position of 9 large procellariiform seabirds from 6 southern breeding localities during the breeding and non-breeding periods. Isotopic ratios of each species were generally consistent among different breeding populations, despite the large geographical scale and potential variation in oceanography in surrounding waters. Both spatial and trophic segregation apparently allowed the coexistence of sympatric species in most breeding localities, except at South Georgia, where both δ 13 C and δ 15 N in chicks showed high overlap among species, probably resulting from the superabundance of alternative food resources during the summer. Low variance in stable isotope ratios among adults in several species indicated high overlap between individuals in feeding habits and trophic levels (i.e. isotopic specialist populations) during the non-breeding period. By contrast, large isotopic variances and the high within-and between-individual components of the trophic niche width suggested that grey-headed and light-mantled sooty albatrosses are generalists. Based on δ 13 C, the species that breed in the Southern Ocean can be categorized as residents or subtropical migrants, with the latter including oceanic and neritic subtropical migrants. Albatrosses meet the high energetic challenge of feather synthesis by foraging in different habitats, depending on the length of the non-breeding period. Annual breeders renew their plumage in productive neritic waters in ~4 mo, whereas biennially breeding species moult in less productive oceanic waters over much longer periods (~12 to 16 mo).

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“…Calonectris leucomelas (Teuten et al 2009 1960-19971% 19984% (Croxall et al 1990, Poncet et al 2006 3% 4% (Poncet et al 2006) (Croxall et al 1998, Neves & Olmos 1998, Schiavini et al 1998, Stagi et al 1988, Phillips et al 2008 1992 4 1995 3 9,388 78% (Klaer & Polacheck 1997) 1988-19929,279 (Murray et al 1993) Brothers (1991 44,000 100,000 (Schiavini et al 1998, Lewison & Crowder 2003 300,000 100,000 (Brothers et al 1999, Gales 1998, Lewison & Crowder 2003 …”

Section: Fulmarus Glacialismentioning

confidence: 99%

Seabirds as indicators of the state of the marine environment and its conservation

Kazama¹,

Ito²,

Niizuma³

et al. 2010

Jpn. J. Ornithol.

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Abstract. For sustainable use of marine resources, ecosystem based management is essential. However, collecting and integrating all the information needed is difficult. Thus it is important to use effective indicators of marine ecosystem change. Seabirds are believed to be useful biological indicators of marine ecosystem changes and marine pollution. In this paper, we review: 1) the responses of seabird to climate driven marine ecosystem changes, 2) the usefulness of seabirds as indicators of marine pollution and its potential effect on seabirds, 3) the status and conservation of albatrosses, focusing on the reduction of long-line by-catch. We review the seabird monitoring program globally and propose a seabird monitoring and network in Japan.

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Status and distribution of wandering, black-browed and grey-headed albatrosses breeding at South Georgia

Cited by 65 publications

References 10 publications

Demographic parameters of black-browed albatrosses Thalassarche melanophris from the Falkland Islands

Demographic parameters of black-browed albatrosses Thalassarche melanophris from the Falkland Islands

Stable isotopes document inter- and intra-specific variation in feeding ecology of nine large southern Procellariiformes

Seabirds as indicators of the state of the marine environment and its conservation

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