Subscribe Now Subscribe Today
Science Alert
 
FOLLOW US:     Facebook     Twitter
Blue
   
Curve Top
International Journal of Oceanography and Marine Ecological System
  Year: 2017 | Volume: 6 | Issue: 1 | Page No.: 1-8
DOI: 10.3923/ijomes.2017.1.8
 
Facebook Twitter Digg Reddit Linkedin StumbleUpon E-mail
Epinephelus Genus Groupers Population Structure and Length-Weight Relationships off Kenyan South Coast Indian Ocean Marine Waters
B.O. Ogongo , E.C. Mwachiro and B.M. Fulanda

Abstract:
Groupers are apex predatory fishes playing important local economic roles and ecosystem functions worldwide. The Kenyan coast Indian Ocean waters have been a good landing centre for nearly 30% of the already identified 98 Epinephelus genus species groupers. However, of late, their natural populations have greatly decreased with the landed individuals mean length and weights showing drastic reductions. Most are therefore caught when either juveniles or sub adults. Information data is therefore needed to avert this alarming decline and initiate conservation measures for these prized premium fishes. This study elucidates the Epinephelus genus groupers population structures and length-weight relationship analyses for these highly sought fishes from Kenyan inshore marine waters. The study results indicated varying significant conditions (p<0.001) for these species having Length-Weight Relationship (LWR) regression coefficients (R2) that appeared to be stronger (R2>0.6000) for 23 species. Despite this apparently strong fit, Analysis of Covariance (ANCOVA) revealed no significant differences between (a) intercept and (b) slopes of the species regression lines (p = 0.5552). R2 analyses also showed consistent non isometric patterns in the plotted power curved data suggesting that unless stringent management measures are implemented to restrict over-exploitation, it is likely that the species currently categorized as ‘Near Threatened’ under the International Union for Conservation of Nature (IUCN) Red list would soon become ‘Endangered’ while those ‘Endangered’ extinct. This can greatly alter the ecosystems’ ecological health as they are apex predators in the demersal food web and their stock depletions would result in the alteration of the ecosystem.
PDF Fulltext XML References Citation Report Citation
 RELATED ARTICLES:
  •    Distribution and Reproductive Patterns of the Epinephelus Genus Groupers off Kenyan South Coast Marine Waters
How to cite this article:

B.O. Ogongo, E.C. Mwachiro and B.M. Fulanda, 2017. Epinephelus Genus Groupers Population Structure and Length-Weight Relationships off Kenyan South Coast Indian Ocean Marine Waters. International Journal of Oceanography and Marine Ecological System, 6: 1-8.

DOI: 10.3923/ijomes.2017.1.8

URL: https://scialert.net/abstract/?doi=ijomes.2017.1.8

 
COMMENT ON THIS PAPER
 
 
 

 

 
 
 
 
 
 
 
 
 

 
 
 
 

       

       

Curve Bottom