Impact of successful larval rearing on the competitiveness of the eel aquaculture in Taiwan, Japan and China

Abstract

本篇描述三種採自宜蘭大溪漁港的三種海水魚體上的魚虱（橈足類亞綱:魚虱科）。它們分別是寄生於眼眶魚[Mene maculate(Bloch & Schneider)]上的Caligus amblygenitalisPillai,1961；寄生於高體若鰺[Carangoides equula(Temminck & Schlegel)]上的C.equulaen.sp.,和寄生於虱目魚[Chanos chanos(Forsskal)上的C.patulus Wilson,1937.Caligusamblygenitalis是首次在印度以外之區域被發現。新種C.equulae與C.confuses Pillai,1961及C.cordyla Pillai,1963最相似，與它們明顯不同之處在於：1.C.equulae的顎足(maxilliped)的體部(corpus)其內緣有三個突起；2.第一胸腳的外肢其末節後緣上的三支羽狀剛毛小而短（而非大而長）。第三種的C.patulus是台灣的新發現種。 Three species of sea lice belonging to the genus Caligus(Copepoda,Caligidae)wererecovered from three species of marine food fishes landed at Da-Hsi Fishing Port locatedon the northeast coast of Taiwan.They are:C.amblygenitalis Pillai,1961 from Menemaculata(Bloch & Schneider);C.equulae n.sp.from Carangoides equula(Temminck &Schlegel);and C.patulus Wilson,1937 from Chanos chanos(Forsskal).This is the firstreport of C.amblygenitalis outside of its type-locality-Vizhingom,India.The new speciesC.equulae is close to C.confuses Pillai,1961 and C.cordyla Pillai,1963 occurring in thewaters of Taiwan.However,it is distinguishable from them by having three protuberancesin myxal region of the corpus of the maxilliped and three small and short(instead of largeand long)plumose setae on the posterior margin of the terminal segment of leg 1 exopod.The third species C.patulus is new to Taiwan.