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16. COMPARATIVE FISHING PERFORMANCES OF STRAIGHT SHANK JHOOK Vs KIRBY BEND HOOK IN FRESHWATERS OF CHHATTISGARH.

Author

Sahu, Devendra, Thomas, Saly N., Renjith, R. K., Swarnkar, Sanjula, Keer, Naresh Raj, Niyazi, Atiya, Chandravanshi, Anchal, and Jaiswal, Kuldeep

Subjects
FISHHOOKS, HOOKS, WATERSHEDS
Abstract

An attempt was made to study the hooking efficiency, hooking location and injury pattern of two widely operated hook types that were used in study area. The study was conducted in two selected sites of Dhamtari district of Chhattisgarh, that was “Rudri barrage” of Mahanadi river and its basin. Straight shank “J” hook of number 14 size (ADDYA fish hook manufacturer) and Kirby bend J-hook of number 14 size (ADDYA fish hook manufacturer) were used to assess the fishing performances. Total 60 hand line operations were targeted for catfishes like Clarius batrachus, Heterpneustes fossilis and some other Channa sp. By evaluating the CPUE of both the hooks results illustrated that the Kirby bend J hook was much more efficient than the normal J hook. The (CPUE) of normal J hook were 33.3 kg, while the Kirby bend hook had CUPE of 43.3 kg. In contrast straight shank J-hooks had 70% of lip hooking, 30% of throat hooking and there was no deep hooking, while in case of Kirby bend hook 69.2% were lip hooked, 15.3% were throat hooked and 7.6% were deep hooked. In straight shank Jhooks the severity of injury observed was 30% as minor, 50% moderate and 10% of severe injury. On the other hand, total 26 fishes caught by Kirby bend hooksrecorded 38.4% of minor, 30% of moderate and 7.6% of severe injury. Live baits, like earthworm and crickets were used on both the hook types. [ABSTRACT FROM AUTHOR]

Published
2020

17. Design and technical characteristics of shark gillnet operating in Mumbai coast

Author

Dar, Shabir A., Thomas, Saly N., Chakraborty, S. K., Dar, Shabir A., Thomas, Saly N., and Chakraborty, S. K.

Abstract

This paper deals with design and general features of shark gillnets operated along Mumbai coast. A PA monofilament of 0.60 to 1.0 mm diameter and selvedge meshes of PE of 1 to 2 mm diameter were used for shark set gillnets along Mumbai coast. Mesh size of the main webbing ranged from 120 to 200 mm with average of 144.4 ± 10.83 mm and rigged with a hanging coefficient of 0.41 to 0.51 with average of 0.42 were commonly used. A hung length ranging from 40 to 105 m with mean of 59 ± 10.37 with total hung depth varying from 6.42 to 10.58 m with average of 8.15 ± 0.49 m. Shark gillnet had a total length of 260 to 456 m with mean of 350.71 ± 28.53 m. The nets were operated mostly at a depth up to 18 m very near to the shore and were of set type of gillnet. Polyamide (PA) monofilament netting of 0.16 to 0.32 mm diameter and of mesh size 26-200 mm were generally used for construction of gillnets throughout the Mumbai coast. Polyamide (PA) monofilament has completely replaced PA multifilament in all the nets except those targeted i.e. white sardine and seerfish.

Published
2017

19. Economic loss assessment on juvenile fish catch due to forced non-selectivity in a selective fishing gear, gillnet along Mumbai coast, India

Author

Dar, Shabir A., Thomas, Saly N., Chakraborty, S. K., Sreekanth, G. B., Balkhi, M. H., Dar, Shabir A., Thomas, Saly N., Chakraborty, S. K., Sreekanth, G. B., and Balkhi, M. H.

Abstract

A study on quantity and value of juvenile fish landings was carried out in the gillnet fishery of three selected landing centers along Mumbai coast viz., Versova, Cuff Parade and Mahim in India using Out board motors (OBM), Inboard motors (IBM) and non-motorised gillnetters respectively. The data on the quantity and value of landed juveniles were collected and analysed to reach a consensus on the gross economic loss on account of juvenile fishing. A bio-economic model was used to estimate economic loss due to juvenile fishing of 18 commercially important species of finfish and shellfish. A huge economic loss was recorded due to fishing of juveniles of 18 species by three different gillnet sectors. The analysis indicated that IBM gillnetters at Cuff Parade incurred maximum loss of Rs. 62.26 crores with major contribution from juveniles of seerfish followed by non-motorised gillnetter (Rs.29.98 crores) at Mahim and 25.33 crores in OBM gillnetters at Versova.

Published
2015

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