Tamil Nadu Fisheries University

About: Tamil Nadu Fisheries University is a education organization based out in Nagapattinam, India. It is known for research contribution in the topics: Biology & Shrimp. The organization has 239 authors who have published 148 publications receiving 914 citations.

Tilapia – An Excellent Candidate Species for World Aquaculture: A Review

Abstract: Aquaculture is currently playing, and will continue to play, a big part in boosting global fish production and in meeting the rising demand of fishery products. Capture fisheries production has levelled off and is no longer considered capable of sustaining the supply of fisheries products needed to meet the growing global demand. Tilapia is the common name for several species of cichlid fish inhabiting freshwater streams, ponds, rivers and lakes and less commonly in brackish water. Considered as an invasive species, tilapias are now of increasing importance in Aquaculture. Tilapia is the second most farmed fish world-wide and its production has quadrupled over the past decade because of its suitability for aquaculture, marketability and stable market prices. Native to Africa and Middle East, tilapias were introduced into over 90 countries for aquaculture and fisheries. Tilapia continued its rapid increase in global production. Recent production figures reported by various sources, our global production estimate for 2015 is 5,576,800 mt. Tilapias are now one of the most widely introduced fish globally that has clearly emerged as a very promising group in aquaculture.

Facile Synthesis of Core/Shell-like NiCo2O4-Decorated MWCNTs and its Excellent Electrocatalytic Activity for Methanol Oxidation.

Abstract: The design and development of an economic and highly active non-precious electrocatalyst for methanol electrooxidation is challenging due to expensiveness of the precursors as well as processes and non-ecofriendliness. In this study, a facile preparation of core-shell-like NiCo2O4 decorated MWCNTs based on a dry synthesis technique was proposed. The synthesized NiCo2O4/MWCNTs were characterized by infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and selected area energy dispersive spectrum. The bimetal oxide nanoparticles with an average size of 6 ± 2 nm were homogeneously distributed onto the surface of the MWCNTs to form a core-shell-like nanostructure. The NiCo2O4/MWCNTs exhibited excellent electrocatalytic activity for the oxidation of methanol in an alkaline solution. The NiCo2O4/MWCNTs exhibited remarkably higher current density of 327 mA/cm(2) and a lower onset potential of 0.128 V in 1.0 M KOH with as high as 5.0 M methanol. The impressive electrocatalytic activity of the NiCo2O4/MWCNTs is promising for development of direct methanol fuel cell based on non-Pt catalysts.

Accumulation of organochlorine and pyrethroid pesticide residues in fish, water, and sediments in the Thamirabarani river system of southern peninsular India

Abstract: This study was undertaken to investigate the bioaccumulation of organochlorine (OCPs) and pyrethroids pesticides in surface water, sediments, fish, and aquatic weeds of the Thamirabarani river system, southern India. Samples were collected from five sampling sites, viz, Manimuthar, Tirunelveli, Srivaikuntam, Authoor, and Punnakayal, and tested for OCPs by gas chromatography-mass spectrometry (GC–MS) following QuEChERS extraction procedure. OCPs detected in surface waters ranged from 0.001 to 34.44 μgl−1; sediments from 0.01 to 16.72 μg kg−1; fish muscle from 0.01 to 26.05 μg kg−1; gills from 0.01 to 40.56 μg kg−1; liver from 0.01 to 65.14 μg kg−1 and aquatic weeds from 0.01 to 5.53 μg kg−1. Endosulfan, aldrin, dieldrin, endrin and heptachlor were the dominant OCPs found above the maximum residue limits set by World Health Organisation for surface waters. Sediments also contained relatively high amounts of endosulfan, aldrin, dieldrin, and endrin. Species - specific bioaccumulation of OCPs in fish muscle tissue was noticed. Rohu contained more endosulfan than catla and tilapia. Concentration of OCPs in the liver was much higher than that in the gills and muscles. Methoxychlor was one of the predominant OCPs in the fish liver. A positive correlation existed between fat content and bioaccumulation of OCPs in fish muscle. Aquatic weeds in the river did not have significant levels of OCPs. Presence of relatively high levels of OCPs in upstream waters is therefore a serious concern and hence suitable measures need to be taken up by regulatory authorities.