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THE EFFECTS OF MANIPULATING WATER TEMPERATURE, PHOTOPERIOD, AND EYESTALK ABLATION ON GONAD MATURATION OF THE SWIMMING CRAB, PORTUNUS TRITUBERCULATUS BY DAE-HYUN KIM 1 ) , SU-KYOUNG KIM 2 ) , JUNG HWA CHOI 3,5 ) , BONG-RAE KIM 4 ) , HYEONG-CHUL SEO 4 ) and IN KWON JANG 4 ) 1 ) Aquaculture Management Division, National Fisheries Research & Development Institute, Busan 619-705, Korea 2 ) East Sea Fisheries Research Institute, National Fisheries Research & Development Institute, Gangneug 210-861, Korea 3 ) Fisheries Resources Research Division, National Fisheries Research & Development Institute, Busan 619-705, Korea 4 ) Crustacean Research Centre, National Fisheries Research & Development Institute, Taean 357-945, Korea ABSTRACT An experiment to induce maturation and spawning of Portunus trituberculatus by manipulating seawater temperature, photoperiod, and eyestalk ablation, and to study the effect these factors have on the variation of nucleic acid content in gonadal tissue, was conducted. Non-incubating adult females were divided among three temperature treatments (natural, 10 ◦ C, and 20 ◦ C) and two photoperiod treatments (15 h and 9 h daylight periods per day, respectively). Within each temperature-photoperiod combination, subjects were further divided into each of two groups, i.e., unilaterally eyestalk ablated and
Crustaceana – Brill
Published: Jan 1, 2010
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