Juniper Publishers-Oceanography Open Access Journal

  Juniper Publishers -  Journal of Oceanography Abstract This study investigates gonado somatic index, food and feeding habit of selected fish species of Lake Kalgwai Jigawa State, Nigeria. Samples of fish were collected every fortnight (July 2012-June 2013) at three major landing sites of the lake. The weight of each fish was recorded, gonads were removed, weighed and the gonadosomatic index (GSI) calculated. Stomach was also removed and the content analyzed using frequency of occurrence and point method. Result obtained reveals GSI to range from 2.39±0.08% in Nile perch Latesniloticus [ 1 ] to 5.92±0.29% in Nile tilapia Oreochromisniloticus [ 1 ]. The stomach content analysis in this study distinguished the fish species into two major groups; Latesniloticus, Mormyrusmacrophthalmus Günther, 1866 and Bayad bagrus bayad Forsskal [ 2 ] were observed to exhibit carnivorous feeding habits and feed predominantly on crustacean, fish, fish parts, mollusks, insects and ...

  Juniper Publishers -  Journal of Oceanography Abstract Protein source is the single most expensive ingredient in feed production. The limitation of this important resource necessitated the need for sourcing for alternative and non-competing protein source especially from  Jatropha curcas  plants. This research thus, investigated the growth performance, survival and body compositions of  Clarias gariepinus  fingerlings (4.30±0.01g) fed five diets containing 40% crude protein and varying inclusion levels of detoxified  Jatropha curcas  meal (DJCM) at 0%, 25%, 50%, 75% and 100% replacement for fishmeal (FM). The results obtained indicated significant differences (P<0.05) for the growth parameters, survival and biological values evaluated. Diet 1 (0% DJCM and 100%FM) gave the best growth parameters in terms of Mean weight gain (10.53±1.95), Food Conversion Ratio (2.73±0.55), Specific Growth Rate (2.19±0.23) and survival rate (73.33±10.41) followe...

  Juniper Publishers -  Journal of Oceanography Abstract Being a disaster-prone country, nearly one million people have been killed in Bangladesh by cyclones since 1820. Cyclonic storms have always been a major concern to coastal plains and offshore islands of Bangladesh. At least 54 damaging cyclones were reported in the coastal area of Bangladesh from 1793 to 2009 estimating once in every 4 years. Coastal community of Moheshkhali Island is adversely affected by natural disasters since time immemorial. Community livelihood data collected with 309 questionnaires from household heads of eight vulnerable and exposed coastal villages and 24 focused group discussion representing various social groups of the Island is the important milestone of the study. Fishing with traditional boat and gear in the Bay of Bengal was identified as the main income generation option of men where sea salt extraction, agriculture, trading and day labor were found as supporting occupatio...