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Reproductive biology of short mackerel, Rastrelliger brachysoma,off Pattani Bay, Lower Gulf of Thailand |
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| รหัสดีโอไอ | |
| Creator | 1. Kay Khine Soe 2. Sukree Hajisamae 3. Nirattisai Petchsupa 4. Zeehan Jaafar 5. Hisam Fazrul 6. Siriporn Pradit |
| Title | Reproductive biology of short mackerel, Rastrelliger brachysoma,off Pattani Bay, Lower Gulf of Thailand |
| Publisher | Research and Development Office, Prince of Songkla University |
| Publication Year | 2565 |
| Journal Title | Songklanakarin Journal of Science an Technology (SJST) |
| Journal Vol. | 44 |
| Journal No. | 1 |
| Page no. | 103-111 |
| Keyword | fecundity, gonadosomatic index (GSI), morphometric maturity, size at first maturity (L50), spawning season |
| URL Website | https://rdo.psu.ac.th/sjst/index.php |
| ISSN | 0125-3395 |
| Abstract | The reproductive biology of short mackerel, Rastrelliger brachysoma, which forms spawning aggregation off PattaniBay was measured by gonadosomatic index (GSI), size at first maturity (L50) and morphometric maturity classification. Wefound an unbalanced sex ratio between males and females (1.60:1, p<0.0001). Two peaks of GSI were coincident with twospawning seasons; the pre-monsoon (February) and the south-west monsoon (May, June, August, and September). The L50 wasestimated to be 17.8 cm and 18.3 cm (TL) for male and female, respectively. The morphometric classification indicated that 50%of R. brachysoma population off Pattani Bay matured at 16.2 cm (TL) and 14.7 cm (FL). Positive relationships were foundbetween fecundity and total length, total weight, and ovary weight. The occurrence of immature and maturing stages foundthroughout the year indicated that the pattern of catch from this habitat might affect fish recruitment and stock. |
