| Autor: |
Théophile Aké Bédia, Valentin N’douba, Essetchi Paul Kouamelan, Bakari Coulibaly, Yao Aristide Konan |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Asian Journal of Fisheries and Aquatic Research. :33-42 |
| ISSN: |
2582-3760 |
| DOI: |
10.9734/ajfar/2020/v9i230157 |
| Popis: |
The study evaluated some population parameters of Polydactylus quadrifilis within Ebrié lagoon (Potou sector). Samples were obtained using artisanal gillnet fishery from April 2004 to March 2006. A total of 741 individuals of P. quadrifilis ranged from 11 to 70 cm were examined. Population parameters were estimated where asymptotic length (L∞) was found 60 cm, growth rate (K) 0.33 per year, the longevity (T max) 9.09 years, and growth performance index (Φ′) 3.06. The length at first capture (Lc50 = 10.60 cm) was lower than the length at first maturity (Lm50 = 40 cm). Total mortality rate (Z) was calculated as 1.10 per year including natural mortality and fishing mortality. The exploitation rate (E=0.36) was found to be less than the maximum exploitation rate (E max = 0.44) and indicated that P. quadrifilis is not overexploited. The current exploitation rate should be maintained by sustainable fisheries measures including monitoring of fishing effort. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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