WBCHSE HS Fisheries case studies
WBCHSE HS Fisheries · Put your knowledge to work in context.
WBCHSE Higher Secondary Fisheries is a vocational elective offered as part of the two-year Higher Secondary course (Class XI and XII) under the West Bengal Council of Higher Education. It is designed for students who want a working knowledge of pond-based aquaculture alongside their general subjects, and it is especially relevant in the fish-belt districts of the state - the 24 Parganas, Nadia, Hooghly, East Medinipur, Murshidabad and Malda - where carp farming, hatcheries and seed trade are everyday livelihoods. The WBCHSE HS Fisheries case studies are 5 cases and about 4,716 words.
1The Pea-Soup Pond: Ammonia Toxicity Under a Dense Bloom
A 0.8 ha pond in Nadia district, average depth 1.6 m, has been cropped for four years without being dried. The farmer stocks 8,000 rohu and catla fingerlings averaging 25 g in July and feeds a home-mixed mash of rice bran and mustard oilcake at about 5% of body weight.
928 words, about 5 min2Twenty-Two Per Cent Hatch: Diagnosing a Rohu Spawning Failure
A private hatchery in Bankura runs its first rohu spawning of the season in the last week of April. A 9 kg female and two 4 kg males are selected from a stock tank where they have been held for weeks together with silver carp broodstock.
933 words, about 5 min3Ulcers, Night Mortality and a Barrel of Copper Sulphate
In a 1 ha pond in Hooghly district, a farmer stocks 6,000 rohu averaging 60 g and 3,000 catla averaging 70 g in June. By August, 40–60 fish are dying every night.
990 words, about 5 min4Twelve Thousand Fingerlings and Twelve Hundred Hens on 0.8 Hectares
A farmer near Barasat has a 0.8 ha pond with an average depth of 1.4 m. Heavy beds of Hydrilla and water hyacinth grow along the margins and in the shallows.
922 words, about 5 min5Two Buyers, One Loan: Choosing a Market Channel for a Women's Group
A self-help group of twelve women in Purba Medinipur leases a 0.6 ha pond for ₹50,000 a year. They plan one 10-month Indian major carp polyculture cycle, stocking 6,000 fingerlings at ₹7 each.
943 words, about 5 min