Tamil Nadu Fisheries University, Thoothukudi
Fisheries College was started at Thoothukudi by Tamil Nadu Agricultural University (TNAU) in October, 1977 as the second fisheries college in India. It was brought under the Tamil Nadu Veterinary and Animal Sciences University (TANUVAS) on 19th September, 1989. The college was renamed as Fisheries College and Research Institute (FC & RI) in 1990 to focus more on research and extension activities. The FC&RI has four campuses: the Main Campus, the Shore Laboratory Campus and the campus that houses staff quarters and Mariculture Research Farm Facility located at Tharuvaikulam, a coastal village 17 km away from the main campus, for undertaking Mariculture / Coastal Aquaculture activities. Fisheries College and Research Institute is adequately staffed with a sanctioned strength of 43 teaching positions and 90 non-teaching positions. Fisheries College and Research Institute, Thoothukudi has been accredited by the Indian Council of Agricultural Research (ICAR), Govt. of India, New Delhi for a period of 5 years from 2016-17 to 2020-21.
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ReprintItem Open Access GROWTH AND REPRODUCTIVE POTENTIAL OF GUPPY POECILIA RETICULATA (PETERS) IN MODULAR SYSTEM OF FISH PRODUCTION(1990) D. MANIKANDAVELU; N. NEETHISELVANBy increasing the growing space at periodic intervals growth and reproductive potential of the common aquarium fish guppy has been monitored over a period of 84 days. When the animals have been transferred from one module with less living space to another with larger space, there is a substantial increment both in size and reproductive capacity. By having such a modular system of fish production, we can have a continuous harvest instead of constantly growing them in a larger space to get Iarger and more number of animals. The sex ratio of males to females in this system appears to be around 2 : 5.ReprintItem Open Access Use of Fermented Ensilage Based Diet in Enhancing the Growth of Common Carp(1992) D. MANIKANDAVELU; N. Neethiselvan; G Jagatheesan; K.SundarsanamThree isoprotein feeds containing 25% protein, namely, rice-bran and gr-groundnut oil cake (control), rice bran, fish meal and fermented fish ensilage were used in the feeding experiments. After 45 days of feeding trial in water re circulatory system, growth was considerably higher in fishes fed with ensilage based diet than the control and diet based on fish meal.ReprintItem Open Access EFFECT OF FORMULATED DIETS ON THE GROWTH AND SURVIVAL OF GOLDFISH (SARASSIUS AURATUS) FRY(Fisheries College and Research Institute, Thoothukudi, Tamilnadu Dr.J.Jayalalitha fisheries University, Nagappatinam, 2000-04) B. AHILAN; M.J.PRINCE JEYASEELANDeb with 20, 30, ard 4070 protein level were formulated and prepared. Fifteen day old fry were stocked in da$ic troughs at densities of 10 and 20 fry/L. The feed with 40% crude protein showed better performance under the stocking density of 10 fry/L followed by 30 and 20 % protein diets. Fry reared at the higher stocking density(20/L) showed relatively better fish biomass production, btrt individual size increment was better with fry stocked at 10/L, on termination of the 30-day experiment.ReprintItem Open Access Effect of antibiotics on the gfowth and maturation in goldfrsh (Carassius auratus)(Fisheries College and Research Institute, Thoothukudi, Tamilnadu Dr.J.Jayalalitha fisheries University, Nagappatinam, 2000-12) B. AHILAN; M.J.PRINCE JEYASEELANThe investigation was aimed at determining the effect of antibiotics on the growth and maturation of goldfish. The fishes were stocked in rectangular cement tanks and fed with artificial feed incorporated with antibiotics (virginiamycin and oxy'tetracycline) at three different concentrations. Among the doses tested for virginiamycin 50 ppm treatment showed highest response for both maturation and growth. The mean weight increment for individual fish was observed to be 4.409 g. In oxy'tetracycline treatment 150 ppm gave positive result for total weight gain of the fishes.ReprintItem Open Access FEEDING HABITS OF SQUIDS OF THOOTHUKKUDI, SOUTH EAST COAST OF INDIA(CHERION, 2000-12) N. Neethiselvan; V.K. VenkataramanilThe investigation on the feeding habits of squids of thoothukkudi waters revealed that they fed mainly on shrimps in their early phase of the life and switched over to fish in the later phase. Cannibalism was; found to persist in all the three species of squids studied. Occurrence of relatively a higher portion of shrimps and other crustaceans in the gut content of Sepioteuthis lessoniana rersealed the oientation of this animal more toutards the sea bottom than Loligo duvauceli and Doryteuthis sibogae.ReprintItem Open Access Optimization of Mesh Size of Gill Nets for Sardinella gibbosa (Bleeker)(2001) N. Neethiselvan; D.Jude; T. VaitheeswaranFishing conducted in inshore waters off Thoothukkudi (Tamil Nadu) during 1997-98 using 16 units of nylon gill nets with 26,28, 30 and 32 mm mesh size made up of 210D/ 1/2 twine revealed that the proportionality co-efficient (k) of the gill net selectivity equation for Sardirella gibbosa was 0.104. Gill net with mesh size 29.6 rim was found to be ideal for,the commercial _exploitation or s. gibbosa which contributes considerably to the Lesser sardine fishery.of Thoothukkudi coast. The details of enmeshing pattern of different length groups of 5. gibbosa in gill nets of different mesh sizes are presented.ThesisItem Open Access PRODUCTION AND MARKETING OF MARINE FISH LANDINGS AT KOMBUTHURAI IN THOOTHUKKUDI DISTRICT, TAMIL NADU.(Fisheries College and Research Institute, Thoothukudi, Tamil Nadu Dr. J. Jayalalithaa Fisheries University, 2001) M. RAJAKUMAR M.F.Sc; Dr. G.SANJEEVIRAJThe present study deals with the analyses of production and marketing of marine fish landings at Kombuthurai for the year 1999. The study area Kombuthurai was purposively selected as it was characterised by responsible low energy exclusive line fishing and institutionalised marketing of fishes on metric units in the Gulf of Mannar, in general and the coastal district of Thoothukkudi, in particular. The study follows cross section of time series data collected from 12 fishermen respondents in the owner – cum – crew head category equally distributed to society A (category I) and society B (category II). The data collection was attended to every Saturday from the 3rd week of January 1999 to the 2nd week of January 2000 using survey schedules I and II. A total of 468 fishing trips were considered for analysis. The data collected include investment details on crafts, engines, gears and accessories; quantity and species of fish landings; marketing and crew share pattern; variable costs and gross returns from line fishing. Tabular analysis, functional analysis, multiple linear regression analysis and economic efficiency measures were the statistical tools used in the study. The analysis on the profile of the respondents showed that the earner – dependent ratio was 1:2.83 and 1:3.80, for category I and category II, respectively. About 27 species of finfishes belonging to families Scombridae, Carangidae, Lutjanidae, Lethrinidae, Centropomidae, Sphyraenidae, Rachycentridae and Belonidae and Elasmobranchs and two species of Cephalopods were formed the fishery in the study area. There were three major fishing seasons observed viz. season I (from III week of January to II week of April), season II (from III week of July to II week of October), Season III (from III week of October to II week of January). The average annual days of employment in fishing came to 171 boat days covering 69 days during season I, 69 days during season II and 33 days during season III. The mean output – input ratio for society A indicated 31% as profit against 36% in society B. The overall mean indicated 61% of operating profit from line fishing during the study period. Fuel oil was found to be the single largest item of variable cost in both the societies. The regression co-efficients of fishing time and distance travelled were found to be positive and significant at p=0.01, while fuel consumption, experience of fishermen, size of crew and types of gears used were positive and significant at p=0.05 in society A and society B during seasons I and II. During season III, the co-efficients of fishing time and experience of fishermen were positive and significant at p=0.01, the coefficients for fuel consumption, size of crew and the types of gears used were positive and significant at p=0.05. The coefficients of variables such as distance travelled and depth of fishing operation were negative and significant at p=0.05 and the coefficient of variable for length of hull was found to be negative and non – significant. It was observed that during season I 86.43% in society A, 80.18% in society B, during season II 82.41% in society A, 88.87 % in society B and during season III 86.64% in society A, 83.04% in society B variation in the total landing was explained by the eight explanatory variables, included in the study. Based on the results of the study, conclusions were drawn and policy implications suggested.ReprintItem Open Access Comparative Fishing Efficiency of Lobster Traps(Fishery Technology, 2001) Balasubramanian, A; Kathavarayan, E; Neethiselvan, NFishing efficiency of lobster traps relies on various factors like design, shape and material of the trap and bait used. investigations on suitable design for lobster trap was attempted using six different designs such as rectangular with synthetic webbing, rectangular with steel wire, hemispherical, circular, semi-cylindrical and trapezoidal. The fishing efficiency of the traps differed significantly (p<0,01). Semicylindrical trap performed well by trapping 53 numbers of lobsters in 30 fishing operations.ReprintItem Open Access EFFECTS OF DIFFERENT PIGMENT SOURCES ON COLOUR CHANGES JUVENILE CARASSIUS AND GROWTH OF AURATUS(Fisheries College and Research Institute, Thoothukudi, Tamilnadu Dr.J.Jayalalitha fisheries University, Nagappatinam, 2001-02) B. AHILAN; M.J.PRINCE JEYASEELANThe investigation was aimed at determining the effects of different pigment sources on colour development and growth juvenile goldfish. Four pigment sources were tried: Shrimp head meal , dried drum stick leaves dried curry leaves and turmeric powder. these pigments were added to basal diet at 10 ,5,5 and 5% respectively and fed into the goldfish for five weeks. fish feed with curry leaves, drumstick leaves, turmeric powder, and shrimp head meal showed better color development than the fish feed with basal diet. Growth was stimulated by shrimp head meal and inhibited by turmeric powder.ReprintItem Open Access A new species of cuttlefish Sepia ramani sp. nov. (Class : Cephalopoda) from Tuticorin Bay, southeast coast of India(Indian Journal of Marine Sciences, 2001-06) Neethiselvan, NA new cuttlefish Sepia ramani sp.nov. collected from Tuticorin Bay (8o48'N, 78o11' E), India, is described based on 50 specimens covering both-sexes with a comparison of the closely related species of the same genus, Sepia pharaonis. Sepia ramani sp.nov resembles S. pharaonis in morphological characters such as fins, funnel, head, buccal membrane and colour and in most of the morphometric characters. However, in S. ramani sp.nov, the tentacular club is long with 15-24 enlarged suckers and enlarged suckers are almost sub equal in size, in contrast to 6 enlarged medial suckers of which 3 to 4 suckers are greatly enlarged in S. pharaonis. Further, the left ventral arm in males of S. ramani.sp.nov is hectocotylised, with l4-16 basal series of quadriserially arranged normal suckers instead of 10-12 in S. pharaonis. Both the newly erected species and S. pharaonis belonging to Sepia sensu strico species complex as the inner cone of both the species are with plate like callosity and without any cavity.ReprintItem Open Access Reproductive biology of the siboga squid Doryteuthis sibogae (Adam) from Thoothukkudi (Tuticorin) coast, southeast coast of India(Indian journal of marine sciences, 2001-12) N. Neethiselvan; V.K. Venkataramani; B. SrikrishnadhasStudies on the seasonal occurrence of maturity stages of Doryteuthis sibogae revealed that it is a prolonged breeder as matured and spent specimens of both the sexes were recorded almost round the year. Two peak spawning periods, one from August to September and another from'December to January were observed. Matured animals were represented by a wider length range inferring non semelparous nature of the species. However, dominance of males during peak spawning season as evidenced fionr sex ratio studies do confirm existence of a minor degree of post spawning mortality in females. The weight of gonad and nidamental glands increased during maturation and proved as good indices of maturation. Females attained maturity earlier than males. Fecundity showed a significant correlation with dorsal mantle length. Doryteuthis sibogae form regular fishery in Thoothukkudi coast on commercial scale. Since this species is a continuous spawner as evidenced in the present study and is intensively exploited at Thoothukkudi bay, an in depth study on stock assessment of this species is an urgent need to sustain the fishery.ReprintItem Open Access Effect of cobalt chtoride and vitamin Bu on the growth and gonadal maturation of goldfrsh Carassius auratus(Fisheries College and Research Institute, Thoothukudi, Tamilnadu Dr.J.Jayalalitha fisheries University, Nagappatinam, 2001-12) B. AHILAN; M.J.PRINCE JEYASEELANThe investigation was aimed at determining the effect of vitamin BD and cobalt chloride on the growth and maturation of goldfish. The fishes were stocked in rectangular cem*ent tanks and fed with artificial feed incorporated with vitamin B12 and cobalt chloride at three d.ifferent concentrations. cobalt chloride incorporated at Z.b ppm gave positive results both for gonadal development and growth' Among the doses-test"d fo. vitamin Br, the 25 ppm concentration had shown highest response for both maturation and growth.ReprintItem Open Access Effectiveness of Fish Aggregating Devices in Freshwater Reservoir Fishery(2002) N. Madhavan; N. NeethiselvanTwo types of bottom set Fish Aggregating Devices (FADs), one of pyramidal shape and another of semi-prismatic shape were constructed using used tyres having a total outer surface area of 60 m2. They were tested for their aggregating efficiency in an artificial fresh water reservoir stocked with freshwater carps such ii catla (Catla catla), rohu (Labeo rohita), mriga) (Cirrluims mrigala) and silver carp (Hypopthalnictitys molitrix) The gill net catch around FAD-s and in non-FAD sites showed significant difference. Pyramidal FAD of 1'6 m height with tyres arranged in vertical orientation attracted more of surface feeders such as catla and silver crap compared to semi-Prismatic FAD of 1.3 m height with tyres arranged in horizontal pattern. the gill net catch around pyramidal FAD was significantly higher than that of semi prismatic FAD. The use of pyramidal FAD to improve catch per unit effort of gill netting in perennial reservoirs of the country, is suggested.ReprintItem Open Access Standardization of Mesh Size of Gill Nets for the Commercial Exploitation of Kawakawa, Euthynnus affinis (Cantor) in Thoothukkudi Coastal Waters, Southeast coast of India(2002) N. Neethiselvan; D.Jude; P. Gopalakrishnan; G. SugumarEuthyrtnus affinis forms notable fishery in Thoothukkudi coastal waters with peak season from June to September Euthynnus affinis is captured in small meshed gillnets popularly called 'PODIVALAI' with mesh size ranging from 60 mm to 115 mm. The present study deals with the standardization of mesh size to capture the commercially significant length group (476-600 mm) of E. affinis and its enmeshing pattern in gillneis with three different mesh size. The optimum mesh size for the commercial exploitation of E. affinis in Thoothukkudi coastal waters is found to be 104.2 mm. Further the study recommends to discourage the use of gill net with 50 mm mesh size for the capture of E. The optimum mesh size for the commercial exploitation of E.affinis in Thoothukkudi coastal waters is found to be 104.2 mm. Further the study recommends to discourage the use of gill net with 50 mm mesh size for the capture of E. aFfinis as this net captures the juveniles of e affnis.ReprintItem Open Access Population dynamics of siboga squid Doryteuthis sibogae (Cephalopoda/Teuthoidea) in Thoothukkudi (Tuticorin) coast, southeast coast of lndia(2002) N. Neethiselvan; V.K. VenkataramaniStudy on the poputalion dynamics of siboga squid Doryteuthis sibogae in Thoothukkudi coast revealed that the seasonal change has define impact on the growth of this species.The. study infers that the cod end mesh size of the trawls of Thoothukkudi has to be increased from 10 to 25 mm to increase the yield per recruit. Further the effort should be reduced and maintained at the exploitation ratio of 0.45 to get maximum yield per recruit.ReprintItem Open Access Lactic Acid Fermentation of Minced Meat of Leiognathus splendens (Cuvier, 1829) using Different Bacterial Sources(2002) N. Neethiselvan; G. Indra Jasmine; G. jeyasekeranFermentation of minced meat of silverbelly Leiognathus splendens (Cuvier, 1829) using three different lactic acid bacterial sources viz. pure culture of Lactobacillus plantarum, fermented cabbage and curd revealed fermented cabbage as the ideal source of lactic acid bacteria fol the preservation of fish meat through lactic acid fermentation 48h fermented cabbage could bling down the PH of the minced meat mixture to 4.4 within 48 h of fermentation whereas the other two minced meat mixtures took nearly 84 h to reach the same pH. Fermented cabbage can also be easily prepared and maintained for fermenting fish meat on commercial scale Free sugar, lactic acid content, NPN, TVBN and lactic acid bacterial count u,ere found to be good indices of quality of the fermented Product under storage.ReprintItem Open Access Breeding biology of the spineless cuttlefish Sepiella inermis (Orbigly)(Indian J. Fish.,, 2002-03) NEETHISELVAN, N; V.K. VENKATARAMANI; N. RAMANATIHANStudies on the seasonal occurrence of maturity stages of Sepiella inermis revealed that this species is a prolonged breeder as mature and spent specimens were recorded almost round the year. Two peak spawning periods, one in November and another in March were observed. Mature animals were represented by a wider length range ruling out the possibility of semelparity. The gonodosomatic and nidamental gland indices increased during maturation. The females attained maturity earlier than males. Fecundity showed a significant correlation with dorsal mantle length. Cuttlefishes contribute substantially to the cephalopod fishery of Thoothukkudi (8'47' N,, 78"9' E), located in south east coast of India. Out of the three species of cuttlefishes, viz. Sepia pharaonis, Sepia aculeata and Sepiella inurmis, which form commercial fishery in this coast, S.inerrnis is notable for its year round occurrence.ReprintItem Open Access Sepia prabahari sp. nov. (Mollusca/Cephalopoda), a new species of Acanthosepion species complex from Tuticorin bay, southeast coast of India(Indian journal of marine sciences, 2002-03) N. Neethiselvan; V.K. Venkataramaninew cuttlefish Sep,a prabahari sp. nov. collected from Tuticorin bay(8"47'N, 78"9'E) is described with a comparison of the closely related species Sepia pharaonis. Sepia prabahari sp. nov. shows a clear-cut sexual dimorphism with respect to length and shape of arms. ln males, first and fourth pair of arms distinctly extended and whip like. However, in females, first and fourth arms are neither distinctly extended nor whip like. Sepia prabahari sp. nov. closely resembles the juvenile of Sepia pharaonis of both of them have distinct tiger-stripe pattern on the dorsal side of the mantle. However,.sepia prubahari sp. nov. can easily be distinguished from the closely related spicies ,S. pharaonis based on the arrangement of suckers in the tentacular club. The tentacular club ofs. prabalrari sp. nov. is with minute suckers of equal size without any entarged suck, ers, in contrast to that of .S. pharaonis with big suckers, of which about 6 suckers in medial rows are much enlarged. In S -prabahari sp. nov. the left ventral arm of male is hectocotylised with 8 hansverse series of normal basal suckers fol-Iowed by 7 series of modified suckers, in contrast to 10-12 basaltransverse series of normal suckers followed by 7 series of modified suckers in S-pharaonis. Further, S prabaha sp. nov belongs to Acanthosepion species complex (Rocheburne, 1884) as its inner cone ofthe cuttlebone is distinct, forming rounded and cap-like cavity in contrast to that of plate like callosity in S.pharaonis and hence belongs to Sep ia sensu stricto species complex. The diagnostic characters of the species belong to the Acalthosepion species complex of the genus Sepla of Indian waters with that of S- prabahari sp. nov. are also discussed.