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http://dx.doi.org/10.9710/kjm.2014.30.4.303

Development and growth in fertilized eggs and larvae of the Japanese geoduck, Panopea japonica reared in the laboratory  

Nam, Myung-Mo (East Sea Fisheries Research Institute NFRDI)
Lee, Chu (East Sea Fisheries Research Institute NFRDI)
Kim, MeeKyung (East Sea Fisheries Research Institute NFRDI)
Kim, Jae Won (Dept. Marine Life Science and Aquaculture, Gangwon Provincial College)
Kim, Young Dae (East Sea Fisheries Research Institute NFRDI)
Publication Information
The Korean Journal of Malacology / v.30, no.4, 2014 , pp. 303-309 More about this Journal
Abstract
The development of Japanese geoduck, Panopea japonica, grown under culture conditions, has been examined through the morphological characteristics in fertilized egg, larvae and juvenile. Gametes were stripped from ripe broodstock and placed into two separate containers. Eggs were washed through a $40{\mu}m$ sieve and fertilized with dilute sperm solution. Developing larvae were maintained at $19{\pm}1^{\circ}C$. Fertilized eggs with $81.6{\mu}m$ diameter developed to trochophores within 14 h and to D-stage larvae ($116{\mu}m$ shell length) within 27 h. Larvae were spontaneously settled at shell length of $311{\mu}m$ after 20 days. The hatching from fertilized eggs and larval rearing were normally available in $18.5-21.5^{\circ}C$, and the growth was good in a cashmilon substrate, as well as sand. After rearing of day 108 from metamorphosis, the shell length of juvenile P. japonica reached 13 mm, and growth rate of shell length of the juvenile was $117.5{\mu}m/d$.
Keywords
Geoduck; Development; Growth; Fertilized egg; Larvae; Juvenile; Panopea japonica;
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