International Journal of Agricultural Engineering

Nimat Syed ¹, Ashish S. Mohite ¹

Affiliations
1 Department of Fisheries Engineering, College of Fisheries, Shirgaon, Ratnagiri (M.S.), IN

Abstract

Wular and Dal Lake are the two largest lakes of Kashmir contributing 70 per cent to the total fish landings of the state. The major catch from these lakes comprised of Cyprinus spp. which is exotic and Schizothorax spp. being the endemic to the lakes. During the study carried out on the operational and design aspects of scoop net and spears in Wular Lake and Dal Lake it was found that spear and scoop net were used in both the lakes. Two types of spears were used across Wular and Dal Lake i.e. multiple head spear, locally called as Panzri and double pronged spear, locally called as Narchoo. Scoop net, locally called as Khashiv and Kranz zal, was usually operated as a secondary gear.

Keywords

Multiple Head Spear, Double Pronged Spear, Scoop Net.

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Mayuri Dongare ¹, Ashish S. Mohite ¹, Makarand Sharangdhar ¹

Affiliations
1 Department of Fisheries Engineering, College of Fisheries, Shirgaon, Ratnagiri (M.S.), IN

Abstract

The present study encompasses the traditional fishing method of cast net practiced in Ratnagiri, Maharashtra. Cast net without central line and without pockets were made up of 3 to 6 panels joined together vertically by take up ratios to form main conical webbing. PA monofilament having diameter of 0.5 to 1.3 mm was commonly used for construction of main webbing of cast net. Two rows of selvedge meshes of PA multifilament of 210 D×3×3 were provided at bottom edge of the net. Selvedge was absent at the apex end of the net. For all panels of main webbing and for selvedge section, mesh size varied from 20 to 40 mm. At apex, all meshes were closed together and were tied to the pulling chord which was made up of PP twisted multifilament rope of 3 to 4 mm diameter and 4 to 7 m in length. For first three panels, joining of the panels was carried out by 1:2 ratio by making knot locally called as Vasan. From panel number 4 to 6 the ratio was maintained as 2:3. The total depth of net varied from 3 to 5 m. PP twisted multifilament rope of 18 to 26 m in length having diameter of 3 to 5 cm was used as sinker line to which oval shaped lead sinkers having 3 to 4 mm diameter and 180 to 225 in numbers were tied at 12 to 16 cm interval. The fish species harvested by the cast net were mullet, lady fish, silver biddies, glass fish, shrimp and crabs.

Keywords

Traditional Fishing Methods, Cast Net, Pag.

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S. L. Bhandkoli ¹, Ashish S. Mohite ¹, R. K. Sadawarte ¹

Affiliations
1 Department of Fisheries Engineering, College of Fisheries, Shirgaon, Ratnagiri (M.S.), IN

Abstract

A total of 47 wooden trawlers were in operation from Mirkarwada fishing harbour of Ratnagiri of which 98 per cent were wooden trawlers fitted with Ashok Leyland make diesel engines. The length class of wooden trawlers ranged from i.e. .below 40 ft (6%), 40-50 ft (64%), 50-60 ft (28%) and above 60 (2%) and the horse power of the engines ranged from, below 100 hp (83%), 100-200 hp (15%) and above 200 hp (2%). During the present study, Ashok Leyland (AL-370, AL-400, AL-402) diesel engine were found to be the most popular and commonly installed marine engine on the wooden trawlers.

Keywords

Trawlers, Diesel Engines, Propeller Pitch, Efficiency, Fuel Consumption.

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Siddhesh Desai ¹, Makarand Sharanghdhar ¹, Ashish S. Mohite ¹

Affiliations
1 Department of Fisheries Engineering, College of Fisheries, Shirgaon, Ratnagiri (M.S.), IN

Abstract

Recently, steel purse seiners were introduced in Ratnagiri, Maharashtra. The present study was an attempt to document the design and technical aspects of steel purse seiners presently operated from Mirkarwada fishing harbour of Ratnagiri. For the steel purse seiners operating along Ratnagiri coast, overall length was recorded to be 19.55 to 19.85 m, breadth at midship 5.79 m to 6.1 m, depth of vessel 3.1-3.65 m, length of freeboard 1.27 m to 1.50 m, draught 1.82 to 2.14 m and length of keel 16.72 m. The steel purse seiners were fitted with engines having maximum horse power of 350 and the minimum horse power recorded was 175 hp.

Keywords

Purse-Seining, Steel Purse Seiners, Design, Technical Specifications.

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Siddhesh Desai ¹, Makarand Sharanghdhar ¹, Ashish S. Mohite ¹

Affiliations
1 Department of Fisheries Engineering, College of Fisheries, Shirgaon, Ratnagiri (M.S.), IN

Abstract

For the wooden purse seiners fitted with below 100 hp engine in operation from Mirkarwada Fishing Harbour, Ratnagiri, Maharashtra, overall length ranged from 11.88 to 16.02 m, breadth at midship 3.63 to 7.2 m, depth of vessel was between 1.77 to 2.09 m, length of freeboard 1.0376 to 1.1941 m, draught 1.0411 to 1.7058 m, length of keel 10.64 to 14.28 m and gross tonnage 30.15 to 8.44 tons. Whereas, for wooden purse seiners fitted with 100 to 200 hp engine, overall ranged from 11.39 to 19.1 m, breadth at midship 2.28 to 7.7 m, depth of vessel 1.96 to 3.4 m, length of freeboard 0.8070 to 1.2147 m, draught 0.8941 to 2 m, length of keel 8.81 to 14.28 m. and gross tonnage 32.11 to 78.44 tons. All wooden purse seiners were fitted with Ashok Leyland make six cylinder inboard diesel engines with their fuel consumption ranging from 15 to 17 lit/hr.

Keywords

Purse-Seining, Wooden Purse Seiners, Horse Power, Technical Specifications, Engines.

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Kalpesh Shinde ¹, Ashish S. Mohite ¹

Affiliations
1 Department of Fisheries Engineering, College of Fisheries, Shirgaon, Ratnagiri (M.S.), IN

Abstract

It was observed that there is a trend in the Ratnagiri fishermen to cover the hull portion of their gillnetters by FRP, to extend its life. The overall length of such type of gillnetters ranged from 06.81 m to 10.00 m. Similarly, overall breadth and depth ranged between 1.25 to 3.10 m 0.47 to 1.6 m, respectively. Inboard engine of 7 to 24 hp were normally installed on the FRP coated wooden gillnetters having gross tonnage of 0.34 to 7.42 t. Construction cost of average size (8.5 m length, 2.2 m breadth and 1.0 m depth) wooden plank built boat coated with FRP, was approximately Rs. 4.0 to 5.0 lakhs, having a average life span of around 15 to 18 years, if maintained properly.

Keywords

FRP Covered Wooden Gillnetters, Technical Aspects.

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N. N. Sawant ¹, Ashish S. Mohite ¹

Affiliations
1 Department of Fisheries Engineering, College of Fisheries (Dr. B.S.K.K.V.), Shirgaon, Ratnagiri (M.S.), IN

Abstract

Trawling is one of the popular fishing methods along the west coast of India. However, there are regional variations in trawl net design, construction and operation. The present study deals with the general characteristics and specifications of fish trawl (137 m) operated along the Ratnagiri coast of Maharashtra. The material used for the fish trawl is HDPE (High density polyethylene) and the knot type used for construction is a single trawl knot. Blue colour netting twine material is normally used having twine diameter of 1.50 mm for construction of netting of wing and belly; while 1.0 mm twine is used for cod end. The mesh size of the cod end section was 18 mm while the upper and lower edge of cod end had 100 meshes in width and 150 meshes in depth.

Keywords

Trawling, Fish Trawl, Disco Dol.

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