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Delord K., Barbraud C. & Weimerskirch H. (2004). Long-term trends in the population size of king penguins at Crozet archipelago: environmental variability and density dependence ? Polar Biol., 27, 793–800.
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Goldsworthy S., Lea M. & Guinet C. (2004). Comparison of mass-transfer and isotopic dilution methods for estimating milk intake in Antarctic fur seal pups. Polar Biol., 27, 801–809.
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Descamps S., Gauthier-Clerc M., Le Bohec C., Gendner J.P. & Le Maho Y. (2005). Impact of predation on King penguin Aptenodytes patagonicus in Crozet archipelago. Polar Biol., 28(4), 303–310.
Abstract: Predation can have major effects on population dynamics, but predator-prey interactions in marine ecosystems have rarely been studied. While the king penguin is one of the most studied seabirds, little is known about the impact of predation on its population dynamics. Here, we determine the impact of the main predators (giant petrels and skuas) on king penguin breeding success taking into account the nocturnal predation of petrels. We found that predation is the most important source of breeding failure for king penguins. The smallest chicks within crèches are the most hunted. The periphery of the colony suffers the highest risk of predation during summer. Our study shows the unequal quality of some areas inside the colony in terms of predation risk and breeding success, and points out the importance of timing in successful breeding.
Keywords: Vertebrata ; Climatic zone ; Aptenodytes patagonicus ; Aves ; Polar region ; Predation
Programme: 137
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Pontier D., Say L., Devillard S. & Bonhomme F. (2005). Genetic structure of domestic cats (Felis catus) of the Kerguelen archipelago 50 years after their introduction. Polar Biol., 28, 268–275.
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Bhaud M., Koubbi P., Razouls S. & Tachon O. (1999). Reproduction of marine invertebrates in high latitudes : study of a set of plankton samples off Terre Adelie coast. Polar Biol., 22, 329–340.
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Mazzei F., Ghigliotti L., Bonillo C., Coutanceau J.P., Ozouf-Costaz C. & Pisano E. (2004). Chromosomal patterns of maker 5S rDNAs in six icefish (Perciformes, Channichthyidae, Notothenioidei). Polar Biol., 28, 47–55.
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Bourgeon S., Criscuolo F., Bertile F., Raclot T., Gabrielsen G.W. & Massemin S. (2006). Effects of clutch sizes and incubation stage on nest desertion in the female Common Eider Somateria mollissima nesting in the high Arctic. Polar Biol., 29(5), 358–363.
Abstract: In bird species, one of the trade-offs between reproduction and survival appears in the parental decision to desert the nest. Nest desertion is modulated by several factors including clutch size. However, the incubation stage at which predation occurs is also an important factor. In this study, we examined whether nest desertion was linked to initial clutch size, partial clutch predation (final clutch size) and the incubation stage at which it happened in a capital breeder: the female common eider (Somateria mollissima) nesting in the high Arctic. The study was performed in Kongsfjorden in 2002 on the western coast of the Svalbard Archipelago (78°55'N, 20°07'E). We observed that nest desertion was higher when the initial clutch size was small. Also, females deserted their nests more during the first third of incubation than later. Thus, as incubation proceeded, nest desertion was less likely to occur even after egg reduction. Our results pointed out that this parental decision in female eiders seemed to depend on initial clutch size and on the date into incubation of clutch reduction.
Keywords: Anatidae ; Vertebrata ; Aves ; Climatic zone ; Reproduction ; Nest desertion ; Somateria mollissima ; Polar region ; Arctic Region ; Nesting ; Female ; Incubation ; Clutch size
Programme: 332
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Labat J.P., Mayzaud P. & Sabini S. (2005). Population dynamics of Themisto gaudichaudii in Kerguelen Islands waters, Southern Indian Ocean. Polar Biol., 28(10), 776–783.
Abstract: Fieldwork was carried out at Kerguelen Islands. Two groups of stations in a coastal area, the Morbihan gulf, were surveyed. At both stations, macroplankton biomass ranged from 2.3 mg dry weight m-3 to 89 mg dry weight m-3and consisted mostly of Themisto gaudichaudii with values ranging from 1.9 mg dry weight m-3 to 50.6 mg dry weight m-3. Biomass was high for sub-Antarctic waters with marked seasonal and inter-zone differences. Biomass minima were observed at the end of the winter, from September to November, while maxima were recorded in summer and in early fall at the beginning of the year between January and April. T. gaudichaudii showed a recruitment of new size classes, mainly from November to January, followed by a rapid growth phase in summer. which slowed down during the southern winter period. Individuals breed after 1 year. Large individuals, older than 1 year, were not a significant presence in the gulf of Morbihan. The main pattern of the population dynamics were characterised by an univoltine life cycle with a very high biomass marked by a strong seasonal signal linked with the hydrological and trophic parameters of the Gulf.
Keywords: Invertebrata ; Arthropoda ; Crustacea ; Aquatic environment ; Climatic zone ; Antarctic Islands ; Kerguelen Islands ; Amphipoda ; Marine environment ; Polar region ; Indian Ocean ; Southern Ocean ; Kerguelen Islands ; Population dynamics
Programme: 353
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Schatt P. & Féral J.P. (1991). The brooding cycle of Abatus cordatus (Echinodermata: Spatangoida) at Kerguelen Islands. Polar Biol., 11, 283–292.
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Koubbi P., Duhamel G. & Hebert C. (2000). Role of bay, fjord and seamount on the early life history of Lepidonotothen squamifrons from the Kerguelen Islands. Polar Biol., 23, 459–465.
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