Habitat differentiation between sei (Balaenoptera borealis) and Bryde's whales (B. brydei) in the western North Pacific

被引:19
作者
Sasaki, Hiroko [1 ]
Murase, Hiroto [2 ]
Kiwada, Hiroshi [3 ]
Matsuoka, Koji [3 ]
Mitani, Yoko [4 ]
Saitoh, Sei-ichi [1 ,5 ]
机构
[1] Hokkaido Univ, Fac Fisheries Sci, Lab Marine Environm & Resource Sensing, Hakodate, Hokkaido 0418611, Japan
[2] Natl Res Inst Far Seas Fisheries, Kanazawa Ku, Yokohama, Kanagawa 2368648, Japan
[3] Inst Cetacean Res, Chuo Ku, Tokyo 1040055, Japan
[4] Hokkaido Univ, Filed Sci Ctr Northern Biosphere, Lab Marine Ecol Change Anal, Hakodate, Hokkaido 0418611, Japan
[5] Hokkaido Univ, Fac Fisheries Sci, Lab Marine Bioresource & Environm Sensing, Hakodate, Hokkaido 0418611, Japan
关键词
Bryde's whale; generalized linear models; habitat partitioning; oceanographic features; sei whale; western North Pacific; WARM-CORE RING; HYDROGRAPHIC STRUCTURE; INTERMEDIATE WATER; CLIMATE-CHANGE; SPERM-WHALE; OCEAN; VARIABILITY; CETACEANS; ABUNDANCE; ZONE;
D O I
10.1111/fog.12037
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
Two closely related baleen whale species, sei and Bryde's whales, in the western North Pacific were studied to identify differences in habitat use. Data were obtained from May to August 2004 and 2005. This study examined the relationship between oceanographic features derived from satellite data and the distribution of sei and Bryde's whales using basic statistics. We investigated oceanographic features including sea surface temperature (SST), sea surface chlorophyll a (Chl-a), sea surface height anomalies (SSHAs), and depth of the habitat. These two whale species used habitats with different SST, Chl-a, and SSHA ranges. The 0.25mgm(-3) Chl-a contour (similar to the definition of the Transition Zone Chlorophyll Front) was a good indicator that separated the habitats of sei and Bryde's whales. Then generalized linear models were used to model the probabilities that the whale species would be present in a habitat and to estimate their habitat distribution throughout the study area as a function of environmental variables. The potential habitats of the two species were clearly divided, and the boundary moved north with seasonal progression. The habitat partitioning results indicated that SST contributed to the patterns of habitat-use and might reflect differences in prey species between the two whales. This study showed that the habitats of the sei and Bryde's whales were clearly divided and their potential habitat-use changed seasonally.
引用
收藏
页码:496 / 508
页数:13
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