Adnan Amin-Safwan and Harman Muhd-Farouk and Nurul Hasyima-Ismail and Hairul Hafiz Mahsol and Mhd Ikhwanuddin (2019) Relationship between the carapace width and body weight increments and the confirmation of Stage 1 ovary after molting of the immature orange mud crab, Scylla olivacea, (Herbst, 1796) in captivity. Songklanakarin Journal of Science and Technology, 41 (6). pp. 1226-1232. ISSN 0125-3395 (P-ISSN) , 2408-1779 (E-ISSN)
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Relationship between the carapace width and body weight increments and the confirmation of Stage 1 ovary after molting of the immature orange mud crab, Scylla olivacea.pdf Download (42kB) |
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Abstract
This study describes the relationships between the carapace width (CW) and body weight (BW) increments and the confirmation of Stage 1 ovary after the molting of immature orange mud crabs, Scylla olivacea, in captivity. Morphological coloration and histological assessments were done on 165 immature female S. olivacea. Healthy crabs were sampled from the Setiu Wetlands in the coastal waters of Terengganu on the Malaysian Peninsula from July to September 2015. Thirty crabs were sacrificed for a preliminary study as a standard (control) in which the gonads (if available) were dissected for histological study. The remaining crabs (n=135) were selected for subsequent analysis (limb autotomy). Compared to the controls, the molted crabs generally did not produce any difference in the stage of the ovaries (remaining in Stage 1) but were observed to have larger oocytes. This demonstrated that the limb autotomy technique may activate hormone regulation, thus triggering vitellogenesis in the mud crab. There were also positive correlations between CW and BW (P=0.001, P<0.01) and significant differences through regression analysis (P=0.002, P<0.01) with the equation y = 2.61x + 6.27 (R2=0.069). These results can be useful for developing baseline data for further crab management in Malaysia.
| Item Type: | Article |
|---|---|
| Keyword: | Molting , S. olivacea , Carapace width , Body weight , Maturation |
| Subjects: | Q Science > QL Zoology > QL1-991 Zoology > QL1-355 General Including geographical distribution Q Science > QL Zoology > QL1-991 Zoology > QL605-739.8 Chordates. Vertebrates |
| Department: | INSTITUTE > Institute for Tropical Biology and Conservation |
| Depositing User: | SITI AZIZAH BINTI IDRIS - |
| Date Deposited: | 29 Aug 2022 11:05 |
| Last Modified: | 29 Aug 2022 11:05 |
| URI: | https://eprints.ums.edu.my/id/eprint/34024 |
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