Squid diet of emperor penguins (Aptenodytes forsteri) in the eastern Weddell Sea, Antarctica during late summer
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چکیده
منابع مشابه
The trophic link between squid and the emperor penguin Aptenodytes forsteri at Pointe Géologie, Antarctica
Cephalopod beaks retrieved from stomachs of dead emperor penguin chicks at Pointe Géologie, Terre Adélie, provide information on taxonomic and size composition of the penguin’s squid diet, on the trophic range of the squid species preyed upon and on the fractional trophic impact of the penguin on the whole food web. Emperor penguins prey upon four squid species (Psychroteuthis glacialis, Kondak...
متن کاملTemporal evolution of decaying summer first-year sea ice in the Western Weddell Sea, Antarctica
The evolution of the main physico-chemical properties of the unflooded 90-cm-thick first-year sea-ice cover at the Ice Station POLarstern (ISPOL) ‘‘clean site’’ is described. ISPOL was an international experiment of the German research icebreaker R.V. Polarstern. The vessel was anchored to an ice floe for an observation period of 5 weeks, during the early summer melt onset in the Western Weddel...
متن کاملEndocrine correlates of parental care in an Antarctic winter breeding seabird, the emperor penguin, Aptenodytes forsteri.
Plasma levels of luteinizing hormone (LH) and prolactin associated with parental behavior were measured in the Antarctic winter breeding emperor penguin, Aptenodytes forsteri. Males exclusively incubate the egg while females exclusively brood the nonhomeothermic young; both sexes alternate in rearing the homeothermic young. Birds were sampled on arrival from the sea through egg laying, incubati...
متن کاملLate Cretaceous through Neogene Deep - Sea Benthic Foraminifers ( Maud Rise , Weddell Sea , Antarctica ) 1
Upper abyssal to lower bathyal benthic foraminifers from ODP Sites 689 (present water depth 2080 m) and 690 (present water depth 2941 m) on Maud Rise (eastern Weddell Sea, Antarctica) are reliable indicators of Maestrichtian through Neogene changes in the deep-water characteristics at high southern latitudes. Benthic foraminiferal faunas were divided into eight assemblages, with periods of faun...
متن کاملMyoglobin production in emperor penguins.
Increased oxygen storage is essential to the diving capacities of marine mammals and seabirds. However, the molecular mechanisms underlying this adaptation are unknown. Myoglobin (Mb) and Mb mRNA concentrations were analyzed in emperor penguin (Aptenodytes forsteri) adults and chicks with spectrophotometric and RNase protection assays to evaluate production of their large Mb-bound O(2) stores. ...
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ژورنال
عنوان ژورنال: Antarctic Science
سال: 1994
ISSN: 0954-1020,1365-2079
DOI: 10.1017/s0954102094000374