Crab
 
Suitability of Gravid Female Blue Swimming Crab for Hatching in the Crab Bank

Jintana Jindalikit1* Likit boonsit2 and Suwarak Wongtho1
1Upper Gulf Marine Fisheries Research and Development Center (Samut Prakan)
2Prachuab Kiri Khan Fishery Provincial Office

Abstract

The study on egg development and hatching rate of gravid female blue swimming crab was
conducted for the suitability of hatching in crab bank. The in situ experiment was conducted in the plastic
buckets at a hatchery in Nong Samed fishing Village, Bang Saphan Subdistrict, Bang Saphan Noi district,
Prachuab Kiri Khan Province. This study was collaborated among the crab gill net fishers, fishery
provincial officers, Prachuab Kiri Khan Province and researchers from the Upper Gulf Marine Fisheries
Research and Development Center, Samuth Prakan Province. The experiment was conducted during May
to December 2008. Gravid female were collected and cultured in plastic buckets at 30 ppt sea water. The
colors of gravid eggs were classified into 4 groups : yellowish orange, brown, grey and black. The results
showed that the development time consumed from eggs hatching into larvae were in the range of 4-7, 2-4,
1-3 and 1-2 and the percentage of hatching rate were 88.17, 84.94, 66.12 and 65.23 for yellowish orange ,
brown, grey and black gravid eggs, respectively.


Key words : blue swimming crab, gravid female crab, crab bank
*Corresponding author: 49 Moo 1, Soi Prarachveriyaporn 16, Bangpeung Sub-district,
Prapradaeng District Samut Prakan Province 10130. e-mail: sepiaumdec@yahoo.com