Growth and diet of a larval myctophid across distinct upwelling regimes in the California Current
Growth and diet of a larval myctophid across distinct upwelling regimes in the California Current
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加利福尼亚洋流不同上升流区的菌蚜幼虫的生长和饮食
DOI：
10.1093/icesjms/fsad070
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发表时间：
2023
影响因子：
3.3
通讯作者：
Smolinski, ed., Szymon
中科院分区：
文献类型：
--
作者：
Swieca, K.;Sponaugle, S.;Schmid, M. S.;Ivory, J.;Corrales-Ugalde, M.;Sutherland, K. R.;Cowen, R. K.;Smolinski, ed., Szymon
东部边界系统支持主要的渔业，其早期阶段依赖于上升流生产。然而，上升流在区域尺度上是高度可变的，导致在空间和时间上广泛分布的分类群的摄食、生长和生存的复杂模式。北加利福尼亚流（NCC）具有季节性和沿海上升流强度的纬向变化特征。在不同的NCC上升流状态下，我们研究了一种优势嗜酸性粒细胞（窄臂杆菌）在其猎物和捕食者的背景下的饮食和幼虫生长。幼虫的食性和生长有显著差异，季节差异大于纬度差异。在冬季，上升流减少时，生长速度明显减慢，肠道不太饱，饮食以桡足动物为主。在夏季上升流期间，生长速度较快的幼虫的肠道更饱满，因为它们以鱿鱼类桡足类动物为食，对营养水平较低的猎物的依赖程度较低。然而，我们的研究结果显示，在中等上升流强度下，最快的增长呈圆顶状。高的浮游动物捕食压力导致生长高于平均水平，这可能表明生长较慢的幼虫选择性损失。我们的研究结果表明，时空分布包含多个区域上升流机制的物种在其整个范围内经历了独特的摄食和捕食环境，这对幼虫的存活具有重要意义。
Eastern boundary systems support major fisheries of species whose early stages depend on upwelling production. However, upwelling can be highly variable at the regional scale, leading to complex patterns of feeding, growth, and survival for taxa that are broadly distributed in space and time. The northern California Current (NCC) is characterized by latitudinal variability in the seasonality and intensity of coastal upwelling. We examined the diet and larval growth of a dominant myctophid (Stenobrachius leucopsarus) in the context of their prey and predators in distinct NCC upwelling regimes. Larvae exhibited significant differences in diet and growth, with greater seasonal than latitudinal variability. In winter, during reduced upwelling, growth was substantially slower, guts less full, and diets dominated by copepod nauplii. During summer upwelling, faster-growing larvae had guts that were more full from feeding on calanoid copepods and relying less heavily on lower trophic level prey. Yet, our findings revealed a dome-shaped relationship with the fastest growth occurring at moderate upwelling intensity. High zooplanktivorous predation pressure led to above average growth, which may indicate the selective loss of slower-growing larvae. Our results suggest that species whose spatio-temporal distributions encompass multiple regional upwelling regimes experience unique feeding and predation environments throughout their range with implications for larval survivorship.
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DOI：
--
发表时间：
2014
期刊：
影响因子：
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作者：
W. Peterson;J. Fisher;J. Peterson;C. Morgan;B. Burke;K. Fresh
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影响因子：
3
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L. Postel;H. Fock;W. Hagen
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W. Hagen
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DOI：
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发表时间：
2019
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影响因子：
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作者：
M. Hidalgo;H. Browman
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影响因子：
2.8
作者：
J. Llopiz
通讯作者：
J. Llopiz
影响因子：
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作者：
Tianli Li;Tong Liu;Ruhan Liu;Lijing Chen
通讯作者：
Tianli Li;Tong Liu;Ruhan Liu;Lijing Chen