The present study was carried out with the aim of bio-securing of white spot syndrome virus (WSSV) on Penaeus monodon culture in grow-out and laboratory condition during the period of March to August 2010. In grow-out system, thirty six earthen ponds of varying sizes ranging from 0.5 to 1.0 ha were surveyed. Among 36 ponds, based on the differences in the management techniques, 15 were semiintensive (group-I), 10 ponds were modified extensive (group-II) and 11 ponds as extensive (group-III). The results of the present study revealed that maximum average body weight (34.5 g), survival of 88% and proportion of pond success was 100% (15/15) with average culture period of 127 days in semiintensive with probiotics applied ponds and the minimum average body weight (25.2g), survival of 79.1% and the proportion of pond failure was 27.2 (3/11) with average culture period of 70.7 days in extensive with regular management. In laboratory experiment, it showed that the cumulative mortalities occurred on 77th day in treatment-I and in control on 45th day and proportion of tanks failure was 100% (14/14) with average culture period of 70.7 days. Histopathological observation also revealed that hypertrophied nuclei was very low in 50 day of experiment than that of 77th day of experiment.
Eggs and larvae of the fishes are known as Ichthyoplankton. Mostly, the eggs are a planktonic and they cannot swim effectively and drift with the ocean currents. A fish larva is a part of zooplankton there consumes small organisms. It is a bio-indicator of an aquatic ecosystem. In the present study, totally 748/100 m 3 fish eggs were collected from both the stations of Point Calimere and Muthupettai. The finfish eggs were recorded maximum in 18/100 m 3 and 24/100 m 3 at station I and II and the larvae were recorded maximum in 8/100 m 3 and 12/100 m 3 at station I and II respectively. When compare two sampling station the maximum of fish eggs and larvae were observed station I than there other station. Sensitive development stages of the fish, like egg and larvae which can affect mainly on predatory problem, environmental parameters and manmade activities. The true diversity date is need for the species conservation and maintenance. Distribution of Fin-fish Eggs and Results Distribution of fish eggs and larvae
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.