309 research outputs found
Pearl oysters and pearl production techniques- Winter School on Recent Advances in Breeding and Larviculture of Marine Finfish and Shellfish
Pearl oysters are soft bodied marine pearl producing bivalve mollusk with hard protective shell. These animals
produce pearls. About 29 species of pearl oysters are available in the world and distributed in tropical and subtropical
regions
Mussel seed resources of India and seeding methods
Commercial farming of mussel is dependent on the availability of seed. The natural spat fall
is considered to be the primary source of seed. Although technology for production of mussel
seed in hatchery has been perfected but it is not economically viable for commercial farming
рдореЛрд▓рд╕реНрдХ рдорд╛рддреНрд╕реНрдпрд┐рдХреА рдХреЗ рдиреНрдпрд╛рдпрд┐рдХ рдкреНрд░рдмрдиреНрдзрди рдХреА рдЖрд╡рд╢реНрдпрдХрддрд╛ рдФрд░ рдореЛрд▓рд╕реНрдХ рдорд╛рддреНрд╕реНрдпрд┐рдХреА рдХреЗ рдЯрд┐рдХрдКрдкрди рдХреЗ рд▓рд┐рдП рдкрд╛рд▓рди рдХрд╛ рд╡рд┐рдХрд╛рд╕
рдХреГрдкрдпрд╛ рдкреВрд░рд╛ рд▓реЗрдЦ рдкрдвреЗ
рд╢рдВрдмреБ рдХреГрд╖рд┐ рдореЗрдВ рдорд╣рд┐рд▓рд╛ рд╕реНрд╡рдпрдВ рд╕рд╣рд╛рдпрдХ рдЧреНрд░реВрдк-рднрд╛рд░рдд рдХреЗ рддрдЯреАрдп рдЬрдирддрд╛ рдХреЗ рд▓рд┐рдП рд░реЛреЫрдЧрд╛рд░ рдПрд╡рдВ рдЖрдорджрдиреА
рдХреГрдкрдпрд╛ рдкреВрд░рд╛ рд▓реЗрдЦрд╛ рдкрдв
Marine pearl production in India
Pearl is a valuable and beautiful gift of the sea. The pearl is formed inside a pearl oyster as a result of secretion of the mantle tissue
р┤ор╡Бр┤др╡Нр┤др╡Бр┤Ър┤┐р┤кр╡Нр┤кр┤┐р┤пр╡Бр┤В р┤ор╡Бр┤др╡Нр┤др╡Бр┤В (Pearl oyster and pearl)
Pearl is a valuable and beautiful gift of the sea. The pearl
is formed inside a pearl oyster as a result of secretion of the mantle tissue
рднрд╛рд░рдд рдореЗрдВ рдкрд┐рдВрдХреНрдЯрд╛рдбрд╛ рдлреНрдпреВрдХрд╛рдЯрд╛ рдореБреШреНрддрд╛ рд╢реБреШреНрддрд┐ рд╕реЗ рдЬреИрд╡рдкреНрд░реМрджреНрдпреЛрдЧрд┐рдХреА рдЕрдиреБрдкреНрд░рдпреЛрдЧ рд╕реЗ рдореЛрддреА рдЙрддреНрдкрд╛рджрди
рдХреГрдкрдпрд╛ рдкреВрд░рд╛ рд▓реЗрдЦрд╛ рдкрдв
Mussel culture
The annual production of mussels, which was 10,000 tonnes in the early 1990's, doubled by 2002 through increased
exploitation and farming. Among the maritime states, maximum production is along the Keralacoast. C.M.F.R.I has
conducted demonstration progranunes in open sea and estuarine fanning of mussels by using rack, raft and long line methods. Hatchery production of seed by induced maturation, induced spawning and larval rearing has also been achieved. The method of harvcsting, processing and the nutritional value of mussel meat are given in this paper
GABA from Hypnea valentiae (Turn.) Mont. and its effect on larval settlement of Perna viridis Linnaeus
The crude GABA (├г- amino butyric acid) extracted from Hypnea valentiae collected from Vizhinjam coast was tested for its activity of favouring settlement of pediveliger larvae of Perna viridis by comparing the similar activity of standard commercial grade GABA. The
results showed better rate of settlement in 10 ppm followed by 15 ppm standard GABA (100% in 10 ppm and 83.3 % in 15 ppm standard GABA) against only 55 % in both 10 and 15 ppm of crude GABA extracted from the seaweed, whereas the control showed 20.73 % of
larval settlement at the end of 48 h. The results are discussed in the light of its advantages and improving its activity through purification of the crude extract
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