Uma Mahesh, V and Ghosh, Shubhadeep and Sreeramulu, K and Rao, M V Hanumantha and Satish Kumar, M (2017) Fishery, biology and stock assessment of spotted seer, Scomberomorus guttatus (Bloch & Schneider) off Andhra Pradesh. Journal of the Marine Biological Association of India, 59 (1). pp. 67-72.
|
Text
JMBAI_59_1_2017_Uma Mahesh.pdf Download (1MB) | Preview |
Abstract
The fishery, biology and stock of the spotted seerfish, Scomberomorus guttatus (Bloch & Schneider) along Andhra Pradesh was studied during 2012-2014. The annual average landing of spotted seer during the period along Andhra coast was 2,614 t. Major contributors were trawlnets-1,104 t (42.2%) and gillnets-950 t (36.3%). Catches were higher during August-December. Length-weight relationship varied significantly between males, females and indeterminates. Growth was isometric in males and allometric in females and indeterminates. Overall sex ratio was 1:1.87. Length at first maturity was 38.9 cm. Peak spawning was observed during November-April. Higher Gonadosomatic index coincided with periods of peak spawning. Mature ovaries contained both maturing (0.41 mm-0.70 mm) and matured (0.71 mm-0.90 mm) ova. von Bertalanffy growth equation was Lt = 71.98 [1-e -0.23 (t + 0.0722)]. Natural mortality, fishing mortality and total mortality were 0.54, 0.49 and 1.03. Exploitation ratio was 0.48. Annual total stocks, biomass and Maximum Sustainable Yield were 8,546 t, 5,335 t and 2,747 t. A minor increase in yield and yield/recruit is possible by increasing the present level of fishing by 20%.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Fishery, biology, stock structure, Scomberomorus guttatus, Andhra Pradesh |
| Subjects: | Demersal Fishes > Seerfishes Marine Fisheries > Stock Assessment |
| Divisions: | CMFRI-Visakhapatnam |
| Depositing User: | Arun Surendran |
| Date Deposited: | 16 Nov 2017 05:22 |
| Last Modified: | 16 Nov 2017 05:22 |
| URI: | http://eprints.cmfri.org.in/id/eprint/12334 |
Actions (login required)
 |
View Item |
