Odisha CHSE +2 Vocational Inland Fisheries study guide
Odisha CHSE +2 Vocational Inland Fisheries · Work through your exam, one topic at a time.
The Odisha CHSE +2 Vocational Inland Fisheries credential is a higher secondary vocational qualification delivered under the Council of Higher Secondary Education, Odisha. It suits students who want a science-linked vocational route after Class 10 and who intend to work in freshwater aquaculture, hatchery operations, fish seed trade, reservoir and riverine fisheries, or small fish-farming enterprises, and it also gives a base for further diploma or degree study in fisheries. The Odisha CHSE +2 Vocational Inland Fisheries study guide has 11 sections and about 4,089 words.
01General Foundation Science and Mathematics for Fisheries
Nearly every recommendation in inland fisheries reaches the student as a rate: lime at 300 kg/ha, urea at 100 kg/ha, KMnO4 at 2-4 mg/L, feed at 3% of body weight, salt at 3% for a dip. The paper checks whether you can turn a rate into a weight or a volume.
402 words, about 2 min02Introduction to Inland Fisheries and Aquaculture Systems
Odisha's inland sector runs on two systems. Capture fisheries take naturally recruited stocks from rivers such as the Mahanadi, Brahmani, Baitarani and Subarnarekha, from reservoirs such as Hirakud, Rengali, Balimela and Upper Kolab, and from the Chilika lagoon, a brackish-water Ramsar site.
370 words, about 2 min03Fish Biology, Taxonomy and Anatomy
Finfish are phylum Chordata, subphylum Vertebrata. Chondrichthyes (sharks, rays) have placoid scales and no swim bladder; Osteichthyes have cycloid or ctenoid scales and a swim bladder.
367 words, about 2 min04Pond Construction, Soil and Water Quality Management
Choose a site with clayey loam soil holding 20-30% clay so that it retains water, with a gentle slope allowing gravity drainage, a perennial water source and no history of flooding. Standard dimensions: water depth 1.5-2.0 m, freeboard 0.3-0.5 m above the water line, dyke top width 1.0-1.5 m, inner side slope 1:1.5 to 1:2, and separate inlet and outlet with a screen and a monk or sluice for draining.
383 words, about 2 min05Fish Seed Production, Hatchery and Nursery Management
Riverine seed collection is unreliable, mixed and carries wild pathogens, so induced breeding supplies almost all carp seed in Odisha. Brood stock of 1-2 kg is reared in separate ponds, fed oil cake and rice bran with periodic injection of vitamins, and selected so that the female is visibly gravid and the male oozes milt on gentle pressure.
374 words, about 2 min06Fish Nutrition, Feed Formulation and Feeding Practices
Carp diets need 30-35% crude protein, catfish and shrimp 40% or more, plus 5-8% lipid, vitamins and minerals. Lysine and methionine are usually the limiting essential amino acids.
370 words, about 2 min07Fish Health, Disease Diagnosis and Biosecurity
Infectious causes are viral, bacterial, fungal or parasitic; non-infectious causes are nutritional, environmental and genetic. Recognise these specific agents: epizootic ulcerative syndrome (EUS), caused by the oomycete Aphanomyces invadans, which produces deep ulcers with grey margins and is a recurring problem in Odisha after cold, wet weather; Aeromonas hydrophila, causing red spot and haemorrhagic septicaemia; Edwardsiella and Pseudomonas septicaemias; white spot from Ichthyophthirius; Argulus, the fish louse; Lernaea, the anchor worm; Dactylogyrus and Gyrodactylus on gills; Myxobolus in muscle.
358 words, about 2 min08Capture Fisheries, Reservoir and Riverine Fisheries Management
Odisha's capture fisheries rest on rivers, reservoirs, wetlands and the Chilika lagoon. Hirakud is the largest reservoir, with Rengali, Balimela and Upper Kolab also important.
350 words, about 2 min09Fish Harvesting, Post-Harvest Technology and Value Addition
Pond harvest is done by seining with a drag net followed by draining, or by repeated partial harvesting to match market demand. Carps are harvested at about 800 g to 1.5 kg after 8-12 months.
387 words, about 2 min10Fisheries Economics, Entrepreneurship and Marketing
Separate fixed costs, which you pay whether or not you harvest (pond rent, depreciation of pump and nets, licence, interest), from variable costs, which scale with production (seed, feed, lime, manure, labour, fuel, harvesting charges). Depreciation is usually straight line: (cost minus salvage value) divided by useful life.
345 words, about 2 min11Practical Skills, Field Work and Project Work
Water analysis is the backbone of the practical paper. Measure pH with a meter or universal indicator paper; transparency with a Secchi disk lowered until it disappears and then raised until it reappears, averaging the two depths; alkalinity by titrating with standard sulphuric acid to a methyl orange end point; hardness by EDTA titration; and dissolved oxygen by the Winkler method.
383 words, about 2 min