天然マダイおよびチダイ稚魚のなわばり形成場所と摂食行動 [in Japanese] Territory Established Location and Foraging Behaviour of Juveniles of Red Sea Bream Pagrus major and Crimson Sea Bream Evynnis japonica [in Japanese]
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We observed territorial juveniles of red sea bream <i>Pagrus major</i> and crimson sea bream, <i>Evynnis japonica</i> to detect interspecific ecological differences in sympatric habitat at Morode Cove in Ehime Prefecture from July to October in 1994. <i>P. major</i> tended to establish its territory in sandy zones where <i>Zostera japonica</i> grew in abundance, whereas <i>E. japonica</i> tended to establish it in sandy zones; the habitats thus slightly differed between the two species. Six common foraging and searching behaviours (sand pecking, substrate pecking, digging, water column feeding, near bottom feeding, blowing) could be distinguished in the two species, but the frequency of four feeding behaviours differed between the two species. It is suggested that the two closely related species might possess different ecological features enabling their coexistence within a restricted nursery ground.
NSUGAF 64(1), 16-25, 1998-01-15
The Japanese Society of Fisheries Science