03409cas a2200385 a 4500 20260817163613.0 110920s1988 th uu|m rtt 0| a1eng d .b10071180 AIT Thesis no.AE-88-33 Chuanpid Thongkum An assessment of mangrove crab (scylla serrata) culture in ponds in Surat Thani Bangkok : Asian Institute of Technology, 1988 111 p. Thesis ; no. AE-88-33 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development Thesis (M.Sc.) - Asian Institute of Technology, 1988 The rearing of ma n grove crabs ( Scyll a serrata ) in pond s in the Kanjanadith District of Surat Thani was assessed. Various people concerned with commercial production of mangrove crabs farmers, fishermen, villagers and middle me n were interviewed a nd all mangrove crab farms in the District were o b served with respect to their rearing practice and economic aspect s , including marketing . Two pond experimental studies on survival and growth of Surat Thani a nd Ranong (imported ) crabs were conducted f or 2 8 days and 15 days , respectively. During these periods, ma l e crabs gained flesh we ight and reached the pre- multistage females developed full y ripe (pre- spawning) ovaries. The value o f the fattened crabs increased to a bout 2-3 times that of post - mounting stage thin c r a bs. A low percent weight gain of 8.13% for Ranong crabs and 13.21 % f or Surat Thani crabs was obtain e d . The extrapolated gross yields obtained from the study we r e 6,320 kg /ha / crop a nd 1,850 kg /ha/crop for Surat Thani and Ranong crabs respectively. · Rearing of imported Ranong crab s in Surat Thani produced some problems of lower survival rate ,more aggressive behaviour, high s toc king cost and low price and small size. The major constraints on crab culture in Surat are (a ) seed supply; (b) price and marketing control by middlemen; (c ) high cost of investment; (d) greater attractiveness of prawn farming. Based on the experimental results , Surat Thani crab s can provide the farmer with 2 a good gross income of 25 , 286 Baht/crop (profit 20 . 05 Bah t/m ) , but the equivalent income of 19,3~7 Baht/crop from Ranong crabs would give a loss o f - 6.17 Baht/m . Crab culture Thailand Surat Thani Machintosh, Donald J., Chairpeson Edwards, Peter, Examination Committee Wee, Kok Leong, Examination Committee Japan, Examination Committee Asian Institute of Technology. Thesis ; no. AE-88-33 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B18934 .b10071180 mnait s 240409 2 951012 m a s 3 mnait mnarc 22 40 Barcode : 30050120581870 CREATED : 2014-07-02 RECORD # : i12759363 LPATRON : 1025196 LCHKIN : 2014-08-08 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 1 TOT RENEW : 0 Barcode : 30050120364855 CREATED : 2016-05-27 RECORD # : i12997225 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 9221 9221 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.AE-88-33 30050120581870 2026-08-17 16:36:13 3 2026-08-17 22 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no.AE-88-33 30050120364855 2026-08-17 16:36:13 2026-08-17 40