Juniper Publishers-Oceanography Open Access Journal

  Juniper Publishers -  Journal of Oceanography Abstract From the June to the August 2013, Casualty happened in fish of some ponds of a farm in an area of Kohgiloye-&-BoyerAhmad province. It is a province in southwest of Iran. Three ponds from eight showed more mortality, they have 5 to 20 dead fish every day for 45 days. Afflicted fish have dark body they swimming near surface or at the bottom of the pond and swam unmatched by the flock. Some fish showed hemorrhages around eye and within the oral cavity and exophthalmia occasionally. 45 moribund rainbow trout sampled for dissection and bacteriological examination. Kidney, liver and spleen of moribund fish examined for the detection and identification of bacteria causative agent of disease in rainbow trout. They cultivated aseptically on different media (Blood Agar, Tryptic soy Agar, TCBS Agar and MacConkey Agar). All fish have been infected and suffered septicemia. A type of gram's negative bacterium was respon

  Juniper Publishers -  Journal of Oceanography Abstract During our routine ecological survey conducted at Pulicat lagoon, the most diverse coelenterate belonging to 2 classes of scyphozoa ( Catostylus mosaicus, Acromitus flagellates, Cyanea capillata, Chrysaora hysoscella) and hydrozoa ( Porpita porpita) 4 families ( Catostylidae, Cyaneidae, Pelagiidae and Porpitidae) and 5 species were recorded. The Catostylus mosaicus was dominated at the Barmouth. A large amount of species occurred during the monsoon season 2013 to 2015. Cnidarians were washed ashore. During the study, the salinity levels were maximum value observed was 41 while the minimum value obtained was 38ppt. Hence, it is necessary to focus on conservation, monitoring and management strategies in places of Pulicat lagoon. Keywords: Jelly fish; Pulicat lagoon; Distribution Introduction Jelly fishes (Cnidaria), are well known bioindicators [ 1 ]. The increasing fr

  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 insect la

  Juniper Publishers -  Journal of Oceanography Introduction Aquaculture activities are increasing worldwide due to the rapid increase in world population and increase in demand for aquaculture products. In recent years, interest of consumers on aquaculture products such as fish and arthropod increased in EU, there by fish farming rapidly increased, in contrast, natural fish stocks were decreased [ 1 ]. Increased demand on fish mainly satisfied by salmon (Salmo salar) in cold regions, by sea bass (Dicentrarchus labrax) and sea bream (Sparus aurata) in Mediterranean and warm regions [ 2 - 4 ]. Growing demands of the consumers will be satisfied along with adaptive aquaculture practices which reduce dependence on natural stocks. It will also create a new business area for the people who live in coastal areas and reduce the economic impacts on them [ 5 ]. Over the last decade, aquaculture industry is growing continuously hereat the environmental effects of the aquaculture