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http://dx.doi.org/10.5657/KFAS.2022.0345

Dietary Habitats of Spinyhead Sculpin Dasycottus setiger in the Coastal Waters of the East Sea, Korea  

Park, Joo Myun (Dokdo Research Center, Korea Institute of Ocean Science & Technology)
Jung, Hae Kun (Fisheries Resources and Environment Division, East Sea Fisheries Research Institute, National Institute of Fisheries Science)
Kim, Beon Sik (Department of Marine Ecology and Environment, Gangneung-Wonju National University)
Jung, Young Woo (Department of Marine Ecology and Environment, Gangneung-Wonju National University)
Lee, Chung Il (Department of Marine Ecology and Environment, Gangneung-Wonju National University)
Publication Information
Korean Journal of Fisheries and Aquatic Sciences / v.55, no.3, 2022 , pp. 345-352 More about this Journal
Abstract
In this study, the dietary habits of the spinyhead sculpin Dasycottus setiger were investigated based on 156 specimens collected seasonally between May 2018 and February 2019 from the East Sea off the Korean coast. In terms of the weight contribution (%W), the main food items of the spinyhead sculpin were found to be teleosts (33.5%), followed by carid shrimps (13.8%), amphipods (13.3%), cephalopods (12.0%), and polychaetes (7.1%). Dietary analyses based on the weight contribution of different prey taxa in the diet of the spinyhead sculpin revealed considerable variation in the dietary composition in terms of the sampling region and fish size implying intra-specific dietary segregation. The spinyhead sculpin showed a size-related trends in dietary shift from amphipods to carid shrimps and teleosts in northern region, and from carid shrimps and mysids to teleosts and cephalopods in middle eastern coast. Multivariate analyses of dietary changes revealed that the dietary composition of spinyhead sculpin is significantly associated with the sampling site, but not the fish size. Amphipods contributed more to the diets of the northern population, while mysids typified the diets of spinyhead scuplin inhabiting the middle eastern coast, indicating differences in available food resources between the two study regions.
Keywords
Stomach contents; Sculpins; Maturity; Coastal habitat; East Sea;
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