Management Indicators and Growth Performance Index of Tilapia Zillii in a Tropical Coastal Estuary
| العنوان: | Management Indicators and Growth Performance Index of Tilapia Zillii in a Tropical Coastal Estuary |
|---|---|
| المؤلفون: | Yemi Akegbejo-Samsons, Adrew O. Agbon, Isaac Tunde Omoniyi, A. A. Akinyemi, Waidi O. Abdul, Festus Idowu Adeosun |
| المصدر: | Journal of Agricultural Science. 4 |
| بيانات النشر: | Canadian Center of Science and Education, 2012. |
| سنة النشر: | 2012 |
| مصطلحات موضوعية: | geography, Veterinary medicine, geography.geographical_feature_category, Overfishing, Ecology, Length frequency, Fish |
| الوصف: | An investigative study was carried-out on management indicators and growth performance index of T. zillii in a tropical coastal estuary for twenty-four consecutive months using length-weight data. Electronic length frequency analysis (ELEFAN), sub-routine of FiSAT II software and empirical models were used to analyse the data. Results showed that the mean size of T. zillii was between 22.10±1.155 cm and 26.10±0.115 cm in April and January respectively. The highest (349.72±2.725g) and lowest (264.14±4.109g) mean weights were recorded in the respective months of December and April. Exploited sizes ranged from 11-12 cm to 36-37 cm. Length class 24-25 cm was mostly exploited, constituting 9.92% while 36-37 cm length class was the least (0.05 %) on the exploitation data. Length-at-first maturity, Lm, length-at-optimum yield, Lopt, longevity, Tmax, and growth performance index were estimated as 10.23 cm, 23.95 cm, 4 years and 3.076 respectively. It was therefore, recommended that, for the fishery to be sustainable, close monitoring should be given during the months of February and April, and exploitation of larger size fish be regulated to prevent recruitment overfishing. |
| تدمد: | 1916-9760 1916-9752 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::4e8d27434db5d1c9d9c2d0a93433a347Test https://doi.org/10.5539/jas.v4n11p66Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi...........4e8d27434db5d1c9d9c2d0a93433a347 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 19169760 19169752 |
|---|