Mortality of juvenile Japanese flounder Paralichthys olivaceus caused by scavenging amphipods and ostracods in trap experiments

摘要: Trap experiments were conducted using wild and artificially reared juvenile Japanese flounder in various conditions as baits a nursery habitat of Mano Bay. All the live placed traps with sand survived good health. However, most without live-reared sand, well injured dead-reared flounder, consumed stripped to skeletons overnight. A large number lysianassoid Orchomene sp. naikaiensis, cypridinid Vargula hilgendorfii, which are typical scavengers, accumulated flounder; however, few amphipods ostracods occurred flounder. Thus, once detected reached by swarm these crustaceans, may be preyed on, irrespective condition fish. This finding is supported aquarium observations that able kill consume Burial will potentially prevent crustaceans from detecting interfering odor The results our study raise possibility scavenging predate hatchery-reared released sea.