Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Marine birds and mammals of the Pacific Subarctic Gyres
Autore:
Springer, AM; Piatt, JF; Shuntov, VP; Van Vliet, GB; Vladimirov, VL; Kuzin, AE; Perlov, AS;
Indirizzi:
Univ Alaska, Inst Marine Sci, Fairbanks, AK 99775 USA Univ Alaska Fairbanks AK USA 99775 st Marine Sci, Fairbanks, AK 99775 USA US Geol Survey, Biol Resources Div, Anchorage, AK 99503 USA US Geol Survey Anchorage AK USA 99503 ources Div, Anchorage, AK 99503 USA TINRO, Pacific Res Inst Fisheries & Oceanog, Vladivostok 690600, Russia TINRO Vladivostok Russia 690600 es & Oceanog, Vladivostok 690600, Russia Russian Fed Res Inst Fisheries & Oceanog, Moscow 107140, Russia Russian Fed Res Inst Fisheries & Oceanog Moscow Russia 107140 40, Russia
Titolo Testata:
PROGRESS IN OCEANOGRAPHY
fascicolo: 2-4, volume: 43, anno: 1999,
pagine: 443 - 487
SICI:
0079-6611(1999)43:2-4<443:MBAMOT>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
NORTHERN ELEPHANT SEAL; QUEEN-CHARLOTTE-ISLANDS; LEACHS STORM-PETRELS; BERING SEA; FUR SEALS; CALLORHINUS-URSINUS; FEEDING-HABITS; FOOD WEBS; ALASKA; GULF;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
96
Recensione:
Indirizzi per estratti:
Indirizzo: Springer, AM Univ Alaska, Inst Marine Sci, Fairbanks, AK 99775 USA Univ Alaska Fairbanks AK USA 99775 , Fairbanks, AK 99775 USA
Citazione:
A.M. Springer et al., "Marine birds and mammals of the Pacific Subarctic Gyres", PROG OCEAN, 43(2-4), 1999, pp. 443-487

Abstract

The importance of the subarctic gyres of the North Pacific Ocean to marinebirds and mammals is poorly known because of a paucity of data spanning appropriate scales of time and space. The little information that is available indicates the western subarctic gyre (WSAG) is more productive than the eastern subarctic gyre (ESAG), In summer the WSAG supports a greater densityand higher biomass of seabirds than the ESAG, including at least two species that are more abundant at nesting colonies in the eastern subarctic. Perhaps most revealing of the seabird distributions in this regard is that of southern hemisphere shearwaters (Puffinus spp.) that overwinter in the North Pacific. Their biomass is an order of magnitude greater than that of any northern hemisphere species and is three-fold greater in the WSAG than in the ESAG, Several species of cetaceans also appear to be, or to have been prior to commercial depletions, more abundant in the WSA, Among the many preyspecies consumed by marine birds and mammals, squids and fishes in the family Myctophidae predominate overall. Other forage species, notably euphausiids, Pacific saury (Cololabis saira) and Atka mackerel (Pleurogmmnus monopterygius) are important at times to certain species. The principal exceptions to this generalization are baleen whales and small seabirds that consume zooplankton. Interannual and decadal-scale variability in the physical environment and food web production affect seabirds and marine mammals at sea and at coastal breeding locations around the margins of the gyres. (C) 1999 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/09/20 alle ore 18:18:46