Larval recruitment and distribution of three small penaeid shrimp species in the Iyo-Nada region off Yamaguchi prefecture [Japan]
2006
Matsuno, S.(Yamaguchi-ken. Fisheries Research Center, Nagato (Japan)) | Abe, Y.
Larval recruitment and distribution of three small penaeid shrimp species in the Iyo-Nada region off Yamaguchi Prefecture were investigated for the samples collected in 2003 and 2004. Spawning of Trachysalambria curvirostris, Metapenaeopsis dalei and Metapenaeopsis barbata began when bottom layer water temperature rose to about 18 deg C in June and lasted to October when the temperature decreased to about 23 deg C. Fifteen to twenty days after spawning, post-larvae began benthic life if the water temperature was around 19 deg C. Mysis stage larvae were distributed in the area where the mud content of the sediments was high and water depth was deep. Post-larvae Metapenaeopsis dalei and Metapenaeopsis barbata were more distributed in the Iyo-Nada than the Oshima-Suido, and post-larvae Trachysalambria curvirostris preferred sandy bottom rather than muddy bottom.
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