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Induced breeding and early development of Villorita cyprlnoides Var cochinensis with comments on hatchery system

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Relation http://eprints.cmfri.org.in/2603/
 
Title Induced breeding and early development of Villorita cyprlnoides Var cochinensis with comments on hatchery system
 
Creator Achari, G P Kumaraswamy
 
Subject Molluscan Fisheries
 
Description Villorita cyprinoides is an important resource which can be developed in low saline conditions
Of the estuarine systems. Villorita cyprinordes var cochinensis is induced to spawn in the laboratory
By adjusting the hydrogen ion concentration. The eggs measuring 56 p develop into trochophore stage by
19 h after fertilization and become '0' shaped larvae (95 p) by 29h By about 11 days the larvae (140 p)
Show signs of settlement but continue planktonic life up to 26 days when they (450 to 500 p) settle at
Bottom.
The laboratory temperature ranged from 27.5OC to 34OC end the salinity ranged from 17.2% to
18.35%. Even though the larvae could survive in almost fresh water condition during late stage of development
Salinity above 19x0 is found to be detrimental to the larvae. The advantages of using hapa system
For hatchery purpose is also presented in the paper.
 
Publisher CMFRI
 
Date 1988
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/2603/1/Article_25.pdf
Achari, G P Kumaraswamy (1988) Induced breeding and early development of Villorita cyprlnoides Var cochinensis with comments on hatchery system. CMFRI Bulletin, 42 (2). pp. 344-348.