EVOLVING SERIAL COLLAPSIBLE FISH TRAP WITH UPGRADED MATERIALS AND FUNNEL DESIGNS

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dc.contributor.advisorNEETHISELVAN, N
dc.contributor.authorARUN JENISH, D
dc.contributor.otherSUNDARAMOORTHY, B
dc.contributor.otherJAWAHAR, P
dc.date.accessioned2018-02-19T09:06:39Z
dc.date.available2018-02-19T09:06:39Z
dc.date.issued2017
dc.description.abstractA study on the comparative analysis of catch performance of two types of serial collapsible fish traps namely Type-1 traps and Type-2 traps was carried out. Funnels of four different shapes such as (i) Rectangular, (ii) Oval, (iii)Heart-in and (iv)Circular were fabricated with two different rear end opening perimeter of 560mm and 700mm so as to fit in Type-1 and Type-2 traps respectively. Two trap units were fabricated under each type of traps. Each trap unit consisted of six trap chambers so as to enable to fit four types of funnels each in triplicate. The main characteristic feature of the Type-1 traps was that it was made up of Galvanized steel tubes having 2.5 cm thickness. Further, the rear end funnel opening of Type-1 traps had smaller perimeter of 560 mm. Type-2 trap frames were fabricated with PVC rods of 2.5 cm thickness. Further, the rear end funnel opening of Type-2 traps had relatively a larger perimeter of 700 mm. The experimental fishing was carried out for six months from November 2016 to April Title :Evolving serial collapsible fish trap with upgraded materials and funnel designs Name : D.Arun jenish Degree : M.F.Sc. (Fisheries Engineering and Technology) Chairman : Dr.N.Neethiselvan Department :Department of Fishing Technology and Fisheries Engineering College :Fisheries College and Research Institute, Thoothukudi Year and University :2017, Tamil Nadu Fisheries University, Ngapattinam. 2017 at Mandapam fishing village of Ramanathapuram district of Tamil Nadu at the rate of 4 fishing trips per month. The traps were operated from a Vallam (a traditional craft of Thoothukudi origin) in fishing grounds three nautical mile off the coast of Mandapam (Lat: 090 14.141‟N; Long: 0790 09.433‟ E) keeping the total soaking duration of traps as 24 h. Significant difference could be observed with respect to catch rate of different species caught irrespective of the types of traps (P<0.01). The difference in shape of rear funnel opening was found to be responsible for the significant difference in the catch rate of the experimental traps(P<0.05). Significant difference could also be observed in the catch rates of both in Type-1 and Type-2 traps with respect to different months (P<0.01). The overall catch rate of Type-1 traps was about 2 times higher (13 Nos/ soaking day) than that of Type-2 trap (7 Nos/ soaking day). Epinephelus malabaricus was found to be the dominant species in Type-1 traps in terms of numbers; where as Acanthurus bleekeri was found to be the dominant species in Type-2 traps. Epinephelus malabaricus ranked first in terms of weight in both Type-1 and Type-2 traps. The traps fitted with the funnel having Oval shaped rear end opening performed better than traps fitted with other shapes of funnels both in Type-1 and Type-2 traps. Considering the Net returns, fitting all the 6 chambers of Type-2 traps with O1 funnel was found to be the best combination to get possible highest net return of Rs 55,011 for 25 fishing days using 30 Trap units per fishing trip.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810041138
dc.language.isoenen_US
dc.pages136en_US
dc.publisherFisheries College and Research Institute, Thoothukudi, Tamil Nadu Fisheries Universityen_US
dc.subFisheriesen_US
dc.subjectnullen_US
dc.themeEvolving serial collapsible fish trap with upgraded materials and funnel designsen_US
dc.these.typeM.Scen_US
dc.titleEVOLVING SERIAL COLLAPSIBLE FISH TRAP WITH UPGRADED MATERIALS AND FUNNEL DESIGNSen_US
dc.typeThesisen_US
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