Distributions and abundances of Pacific sardine (Sardinops sagax) and other pelagic fishes in the California Current Ecosystem during spring 2006, 2008, and 2010,estimated from acoustic–trawl surveys
Distributions and abundances of Pacific sardine (Sardinops sagax) and other pelagic fishes in the California Current Ecosystem during spring 2006, 2008, and 2010,estimated from acoustic–trawl surveys
复制标题
2006 年、2008 年和 2010 年春季加州海流生态系统中太平洋沙丁鱼 (Sardinops sagax) 和其他中上层鱼类的分布和丰度，根据声拖网调查估算
DOI：
--
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
B. Macewicz
中科院分区：
文献类型：
--
作者：
J. Zwolinski;D. Demer;Kyle A. Byers;G. Cutter;Josiah S. Renfree;Thomas S. Sessions;B. Macewicz
沿海远洋鱼类的丰度和分布
The abundances and distributions of coastal pelagic fish
species in the California Current Ecosystem from San Diego to southern Vancouver Island, were estimated from combined acoustic and trawl surveys conducted in the spring of 2006, 2008, and 2010. Pacific sardine (Sardinops sagax), jack mackerel (Trachurus symmetricus), and Pacific mackerel (Scomber japonicus) were the dominant coastal pelagic fish species, in that order. Northern anchovy (Engraulis mordax) and Pacific herring (Clupea pallasii) were sampled only sporadically and therefore estimates for these species were
unreliable. The estimates of sardine biomass compared well with those of the annual assessments and confirmed a declining trajectory of the “northern stock” since 2006. During the sampling period, the biomass of jack mackerel was stable or increasing, and that of Pacific mackerel was
low and variable. The uncertainties in these estimates are mostly the result of spatial patchiness which increased
from sardine to mackerels to anchovy and herring. Future surveys of coastal pelagic fish species in the California
Current Ecosystem should benefit from adaptive sampling based on modeled habitat; increased echosounder and trawl sampling, particularly for the most patchy and nearshore species; and directed-trawl sampling for improved species identification and estimations of their acoustic target
stren