Reproductive Performance of Seabirds and Seals at South Georgia and Signy Island, South Orkney Islands, 1976–1987: Implications for Southern Ocean Monitoring Studies

Croxall, John P.; McCann, Tom; Prince, P. A.; Rothery, P.

doi:10.1007/978-3-642-73724-4_23

Cited by 257 publications

(182 citation statements)

References 43 publications

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“…This was similar to the range of actual breeding success (chicks fledged from eggs laid) at Bird Island (0% to 67%, n = 11 seasons; Prince 1985;Croxall et al 1988) and lower than at Macquarie Island (48% to 86%, n = 7 seasons; Copson 1988), which lies north of the Antarctic Convergence.…”

Section: Breeding Biologysupporting

confidence: 76%

“…Regular monitoring since 1976 at Bird Island found the size of the breeding population of Black-browed Albatrosses to fluctuate annually (Prince 1985;Croxall et al 1988). Further information is needed to clarify whether the present data records an increase in the population at Heard Island or annual fluctuations in the breeding numbers.…”

Section: Population Status and Trendsmentioning

confidence: 67%

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The Status of the Black-browed AlbatrossDiomedea melanophrysat Heard Island

Kirkwood

Mitchell²

1992

Emu - Austral Ornithology

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Section: Breeding Biologysupporting

confidence: 76%

Section: Population Status and Trendsmentioning

confidence: 67%

The Status of the Black-browed AlbatrossDiomedea melanophrysat Heard Island

Kirkwood

Mitchell²

1992

Emu - Austral Ornithology

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“…Previous work has shown that Adélie penguins feed on krill, fish and cephalopods during winter months in the Scotia-Weddell Confluence region , and consequently rely upon successful krill recruitment (Croxall et al 1988;Murphy et al 2004). Antarctic krill may be found at high concentrations near the ice edge in winter (Marschall 1988;Tynan 1998;Nicol et al 2000).…”

Section: Discussionmentioning

confidence: 99%

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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“…Renner (1998) concluded that the unusually long foraging trips at Motuara Island were partly a response to the reduced availability of pilchard (Sardinops neopilchardus) that died off in the Marlborough Sounds during the 1995 breeding season (Smith et al 1996). Increased time spent foraging at sea in the face of food shortage has been reported for little penguins (Weavers 1992;Hobday 1992) and also several other seabirds and marine mammals (e.g., Croxall et al 1988;Le Maho et al 1993). Long foraging trips of penguins from Motuara Island were common prior to the pilchard die-off …”

Section: Prolonged Foraging Trips and Higher Risk Of Egg Desertionmentioning

confidence: 92%

Prolonged foraging trips and egg desertion in little penguins (Eudyptula minor)

Numata

Davis

Renner

2000

New Zealand Journal of Zoology

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Penguins share incubation duties between the male and female of a pair. The one left on the nest must fast while its partner is foraging at sea. Nest attendance patterns during the incubation period reflect the way time is allocated between the conflicting demands of incubation and foraging. We conducted daily nest checks for little penguins (Eudyptula minor) at two localities in New Zealand (Motuara Island in the Marlborough Sounds and Oamaru, Otago) in the 1998/99 breeding season and found significant variation in nest attendance between the two areas. Penguins breeding at Motuara Island made significantly longer foraging trips and were in poorer body condition than those breeding at Oamaru. Foraging trip durations were significantly correlated with the body condition of birds at both areas: the poorer the condition, the longer the foraging trip durations. The increased risk of egg desertion observed at Motuara Island is probably a consequence of the prolonged foraging trips that limit the time available for incubation.

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Reproductive Performance of Seabirds and Seals at South Georgia and Signy Island, South Orkney Islands, 1976–1987: Implications for Southern Ocean Monitoring Studies

Cited by 257 publications

References 43 publications

The Status of the Black-browed AlbatrossDiomedea melanophrysat Heard Island

The Status of the Black-browed AlbatrossDiomedea melanophrysat Heard Island

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

Prolonged foraging trips and egg desertion in little penguins (Eudyptula minor)

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