Distributional responses to small-scale habitat variability by early juvenile silver hake, Merluccius bilinearis

被引：0
作者：
Peter J. Auster
Richard J. Malatesta
Carol Lee S. Donaldson
机构：
[1] The University of Connecticut at Avery Point,NOAA's National Undersea Research Center
[2] Sea Education Association,Marine Sciences Institute
[3] The University of Connecticut at Avery Point,undefined
来源：
Environmental Biology of Fishes | 1997年 / 50卷
关键词：
ROV; transect; video; predator avoidance; prey capture;
D O I：
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中图分类号：
学科分类号：
摘要：
Early juvenile (0-year) silver hake, Merluccius bilinearis, occurred at higher densities on bottoms with greater amphipod tube cover at a 55 m deep site in the Middle Atlantic Bight. The size range of individuals at this site was 1.5–5 cm total length. Additional observations at other sites showed that 0-year silver hake only occurred on silt-sand bottom with amphipod tubes at bottom water temperatures of 8.7–11.4 °C. This distribution pattern could be the result of either selective settlement into appropriate habitats or differential predation with higher survivorship in more complex habitats. We posit that 0-year silver hake occur in patches of dense amphipod tube cover to avoid visual predators and co-occur with preferred prey (i.e., amphipods and shrimps).
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页码：195 / 200
页数：5
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