Patterns in diet reveal foraging site fidelity of short-tailed shearwaters in the southeastern Bering Sea

被引:20
作者
Baduini, Cheryl L.
Hunt, George L., Jr.
Pinchuk, Alexei I.
Coyle, Kenneth O.
机构
[1] Univ Calif Irvine, Dept Ecol & Evolutionary Biol, Irvine, CA 92697 USA
[2] Univ Alaska, Inst Marine Sci, Fairbanks, AK 99775 USA
关键词
short-tailed shearwater; Puffinus tenuirostris; euphausiid; gadid fishes; stable isotope; fatty acid; diet prey;
D O I
10.3354/meps320279
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
The short-tailed shearwater Puffinus tenuirostris is an apex predator in the southeastern Bering Sea ecosystem. During 1997 to 1999, a period of great variability in the Bering Sea, we used a multi-pronged approach to study transfer of carbon and nitrogen to short-tailed shearwaters through analysis of stomach contents of birds collected while foraging, and stable isotope and fatty acid composition of tissues from shearwaters and their prey. Two conclusions result from these 3 analyses of feeding history. First, short-tailed shearwaters demonstrated localized differences in diet with respect to sampling location and season, indicating that shearwaters feed in discrete locations long enough (several weeks) to reflect regional differences in prey availability. Second, elevated delta N-15 levels (similar to 1 to 2 parts per thousand) in the liver of shearwaters in the fall of 1997 and 1998 were likely a response to nutritional stress and overturn of nutrients in the tissues of birds or elevated isotope levels in tissues of prey, rather than an increase in the trophic level of the diet. Over the 3 yr period, shearwater diets switched from adult euphausiids Thysanoessa raschii and T inermis (usually females with spermatophores) taken in spring to an increase in the amount of fish (Pacific sandlance Ammodytes hexapterus), juvenile Gadidae fishes and larval walleye pollock Theragra chalcograma particularly in fall (1997 excepted). For each location and year, there was a consistent trend in isotopic values, with an increase of 3 to 5 parts per thousand for delta N-15 and 1 to 3 parts per thousand for delta C-13 between shearwaters and their primary prey. The resolution of our sampling techniques indicates little movement of shearwater flocks among sample locations for periods of up to several weeks.
引用
收藏
页码:279 / 292
页数:14
相关论文
共 49 条
[1]   THE BASIC FATTY-ACID COMPOSITION OF ATLANTIC FISH OILS - POTENTIAL SIMILARITIES USEFUL FOR ENRICHMENT OF POLY-UNSATURATED FATTY-ACIDS BY UREA COMPLEXATION [J].
ACKMAN, RG ;
RATNAYAKE, WMN ;
OLSSON, B .
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY, 1988, 65 (01) :136-138
[2]   Determining the body condition of short-tailed shearwaters: implications for migratory flight ranges and starvation events [J].
Baduini, CL ;
Lovvorn, JR ;
Hunt, GL .
MARINE ECOLOGY PROGRESS SERIES, 2001, 222 :265-277
[3]   Mass mortality of short-tailed shearwaters in the south-eastern Bering Sea during summer 1997 [J].
Baduini, CL ;
Hyrenbach, KD ;
Coyle, KO ;
Pinchuk, A ;
Mendenhall, V ;
Hunt, GL .
FISHERIES OCEANOGRAPHY, 2001, 10 (01) :117-130
[4]   Among- and within-species variability in fatty acid signatures of marine fish and invertebrates on the Scotian Shelf, Georges Bank, and southern Gulf of St. Lawrence [J].
Budge, SM ;
Iverson, SJ ;
Bowen, WD ;
Ackman, RG .
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES, 2002, 59 (05) :886-898
[5]  
Calder, 1981, E BERING SEA SHELF O, P689
[6]   Nutrition, physiology, and stable isotopes: New information from fasting and molting penguins [J].
Cherel, Y ;
Hobson, KA ;
Bailleul, FR ;
Groscolas, R .
ECOLOGY, 2005, 86 (11) :2881-2888
[7]   Using stable isotopes to study resource acquisition and allocation in procellariiform seabirds [J].
Cherel, Y ;
Hobson, KA ;
Weimerskirch, H .
OECOLOGIA, 2005, 145 (04) :533-540
[8]   Lipid composition of stomach oil in a procellariiform seabird Puffinus tenuirostris:: implications for food web studies [J].
Connan, M ;
Mayzaud, P ;
Boutoute, M ;
Weimerskirch, H ;
Cherel, Y .
MARINE ECOLOGY PROGRESS SERIES, 2005, 290 :277-290
[9]   The abundance and distribution of euphausiids and zero-age pollock on the inner shelf of the southeast Bering Sea near the Inner Front in 1997-1999 [J].
Coyle, KO ;
Pinchuk, AI .
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY, 2002, 49 (26) :6009-6030
[10]   Lipids and stable isotopes in common eider, black-legged kittiwake and northern fulmar: a trophic study from an Arctic fjord [J].
Dahl, TM ;
Falk-Petersen, S ;
Gabrielsen, GW ;
Sargent, JR ;
Hop, H ;
Millar, RM .
MARINE ECOLOGY PROGRESS SERIES, 2003, 256 :257-269