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Titolo:
Diet of ringed seals (Phoca hispida) on the east and west sides of the North Water Polynya, northern Baffin Bay
Autore:
Holst, M; Stirling, I; Hobson, KA;
Indirizzi:
Univ Alberta, Dept Biol Sci, Edmonton, AB T6G 2E9, Canada Univ Alberta Edmonton AB Canada T6G 2E9 Sci, Edmonton, AB T6G 2E9, Canada Canadian Wildlife Serv, Edmonton, AB T6H 3S5, Canada Canadian Wildlife Serv Edmonton AB Canada T6H 3S5 ton, AB T6H 3S5, Canada Prairie & No Wildlife Res Ctr, Canadian Wildlife Serv, Saskatoon, SK S7N 0X4, Canada Prairie & No Wildlife Res Ctr Saskatoon SK Canada S7N 0X4 S7N 0X4, Canada Univ Saskatchewan, Dept Biol, Saskatoon, SK S7N 0W0, Canada Univ Saskatchewan Saskatoon SK Canada S7N 0W0 skatoon, SK S7N 0W0, Canada
Titolo Testata:
MARINE MAMMAL SCIENCE
fascicolo: 4, volume: 17, anno: 2001,
pagine: 888 - 908
SICI:
0824-0469(200110)17:4<888:DORS(H>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
STABLE-CARBON DELTA-C-13; TROPHIC RELATIONSHIPS; DELTA-N-15 ANALYSIS; STOMACH CONTENTS; MARINE MAMMALS; WEDDELL SEALS; ICE EDGES; ISOTOPES; NITROGEN; ALASKA;
Keywords:
ringed seal; Phoca hispida; North Water Polynya; Baffin Bay; stable isotopes; diet; arctic cod; polar cod; Themisto libellula;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
72
Recensione:
Indirizzi per estratti:
Indirizzo: Holst, M Univ Alberta, Dept Biol Sci, Edmonton, AB T6G 2E9, Canada Univ Alberta Edmonton AB Canada T6G 2E9 nton, AB T6G 2E9, Canada
Citazione:
M. Holst et al., "Diet of ringed seals (Phoca hispida) on the east and west sides of the North Water Polynya, northern Baffin Bay", MAR MAMM SC, 17(4), 2001, pp. 888-908

Abstract

In conjunction with the International North Water Polynya Study (NOW) in northern Baffin Bay, we examined the diets of ringed seals (Phoca hispida)(1) on the west (Grise Fiord, Nunavut) and east (Qaanaaq, Greenland) sides ofthe polynya, using conventional stomach content analysis, as well as inferences from stable isotope ratios in seal muscle. Between May and July 1998,stomach and muscle tissue samples were collected from 99 ringed seals taken near Grise Fiord and 100 taken near Qaanaaq. The amphipod Themisto libellula was the dominant prey type in the diet of immature ringed seals from Grise Fiord, whereas arctic cod (Boreogadus saida) and polar cod (Arctogadus glacialis) predominated in the diet of adults. Both immature and adult seals collected near Qaanaaq fed predominantly on arctic cod. Overall, seals collected near Grise Fiord had significantly higher delta C-13 values than those collected near Qaanaaq (P < 0.001), but there was no statistical separation in delta N-15 values between the two samples (P = 0.06). Differences in diets of ringed seals from the east and west sides of the North Water Polynya may be due to differences in prey distribution and/or differences in biological productivity and fish biomass within the polynya.

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Documento generato il 21/09/20 alle ore 12:22:25