Long-term climate-related changes in somatic growth and population dynamics of Hokkaido chum salmon
Long-term climate-related changes in somatic growth and population dynamics of Hokkaido chum salmon
复制标题
北海道鲑鱼体细胞生长和种群动态与气候相关的长期变化
DOI:
10.1007/s10641-010-9725-7
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发表时间:
2011
影响因子:
1.4
通讯作者:
et al
中科院分区:
文献类型:
--
作者:
Seo;H.;Kaeriyama;M.;et al
We used multiple regression and path analysis to examine the effects of regional and larger spatial scales of climatic/oceanic conditions on the growth, survival, and population dynamics of Hokkaido chum salmon (Oncorhynchus keta). Variability in the growth of chum salmon at ages 1 to 4 was estimated from scale analysis and the back-calculation method using scales of 4-year-old adults returning to the Ishikari River in Hokkaido, Japan, during 1943–2005. Growth of chum salmon at age 1 was less during the period from the 1940s to the mid-1970s compared to the period from the mid-1980s to the present. On the other hand, growth of chum salmon at ages 2, 3, and 4 has declined since the 1980s. Path analysis indicated that growth at age 1 in the Okhotsk Sea was directly affected by warmer sea surface temperatures associated with global warming. The increased growth at age 1 led directly to higher survival rates and indirectly to larger population sizes. Subsequently, in the Bering Sea, the larger population size was directly associated with decreased growth at age 3 and indirectly associated with shorter adult fork lengths despite the lack of relationships among sea surface temperature, zooplankton biomass, and growth at ages 2 to 4. Therefore, higher growth at age 1 related to global warming positively affected the survival rate of juvenile chum salmon in the Okhotsk Sea. The higher survival rates in turn appear to be causing a population density-dependent effect on growth at ages 2 to 4 and maturation in the Bering Sea due to limited carrying capacity.
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DOI:
10.1093/acprof:oso/9780198507499.003.0006
发表时间:
2005
期刊:
--
影响因子:
--
作者:
Geir Ottersen;J. Alheit;K. Drinkwater;K. Friedland;E. Hagen;N. Stenseth
通讯作者:
N. Stenseth
DOI:
--
发表时间:
1998
期刊:
--
影响因子:
--
作者:
M. Kaeriyama
通讯作者:
M. Kaeriyama
影响因子:
1.4
作者:
Moss, JH;Beauchamp, DA;Helle, JH
通讯作者:
Helle, JH
影响因子:
1.9
作者:
Toshihiko Saito;T. Kaga;J. Seki;T. Otake
通讯作者:
Toshihiko Saito;T. Kaga;J. Seki;T. Otake
DOI:
--
发表时间:
1982
期刊:
--
影响因子:
--
作者:
M. Kaeriyama;T. Bunya
通讯作者:
T. Bunya