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Salient findings – Kisan Suvidha
12382
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Salient findings

Salient findings

1. The growth performances of catla and mrigal are significant and are best suited for stocking in this reservoir. The optimum stocking density for catla was estimated at 250-350 nos.ha’ as per Lorenzen’s density dependent growth model.

2. This reservoir is unsuitable for stocking rohu, grass carp and scampi.

3. Harvesting catla at mid-length between 410-510 mm would give better yield at stocking density (250-350Nos.ha-I ). The optimum mesh sizes of nets to capture catlaoflOOO-2000 gare 125 mm, 150mmand 180mm.

4. Harvesting mrigal at length range 435 to 485 mm (0.950 to 1.5 kg) would give the highest yield at stocking density (368 nos. ha’) using nets of mesh size of 100 mm and 125 mm.

5. The major landing season is May – July. During this period fishing effort may be increased.

 

Constraint

1. The failure to recapture rohu, scampi and grass carp probably due to seed escapement by nature of their movement along with the river course or unfavourable habitat conditions for survival.

2. Seeds and surface-dwelling fish e.g. catla are heavily predated by otters and birds

3. Water level is not decreasing even in summer to facilitate easy harvesting.

4. During summer, surface water temperature is rising to 30S C, thus allowing the adult fishes taking shelter in deeper areas.

 

Source-

  • Central Inland Fisheries Research Institute, Barrackpore

 

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