The recruitment pattern of Macrobrachium species from Igbedi Creek, Bayelsa State, Niger Delta, Nigeria
1 Department of Fisheries, Niger Delta University, Wilberforce Island, PMB 071 Bayelsa State NG, 560103, Amassoma, Wilberforce Island, Bayelsa State, Nigeria.
2 Department of Fisheries and Aquatic Environment, Rivers State University, Nkpolu, Oroworukwo. P. M. B. 5080, Port Harcourt, Rivers State, Nigeria.
Research Article
International Journal of Scientific Research Updates, 2022, 04(01), 030–036.
Article DOI: 10.53430/ijsru.2022.4.1.0071
Publication history:
Received on 03 June 2022; revised on 09 July 2022; accepted on 11 July 2022
Abstract:
The recruitment pattern of Macrobrachium species at Igbedi Creek, Bayelsa State, Nigeria, were investigated to show if it can support optimum shrimp catch in the year 2020. The riparian settlements of Ogoubiri, Toruibeni, Amassoma and Otuan were chosen for this research. The result showed that there are three species in the Creek which were Macrobrachium macrobrachion, Macrobrachium vollenhovenii and Macrobrachium felicinum. Juveniles and ovigerous females were observed for all three species. The recruitment model in FiSAT II was utilized and the result showed that the percentage recruitment peak for Macrobrachium macrobrachion was 23.78% in the month of June while Macrobrachium vollenhovenii was 17.40% in the month of July. Recruitment peaks were recorded for both sexes in the months of March to September in all four locations and there was year-round recruitment for the both species. The species Macrobrachium felicinum was captured in the month of November with few catches. Male domination of females for Macrobrachium vollenhovenii and Macrobrachium felicinum were recorded. Therefore, this study recommend that optimum catch can be attained through closed season policies and further research on Macrobrachium species at Igbedi Creek.
Keywords:
Recruitment pattern; Macrobrachium; Igbedi Creek; Niger Delta; Optimum catch
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