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Studies on induced maturation, spawning and larval settlement in green mussel Perna viridis (Linnaeus, 1758)

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Relation http://eprints.cmfri.org.in/7136/
 
Title Studies on induced maturation, spawning and larval settlement in green mussel Perna viridis (Linnaeus, 1758)
 
Creator Nair, Manoj R
 
Subject Aquaculture
Theses
Mussel culture
 
Description In the green mussel Perna viridis (Linnaeus, 1758), studies were undertaken on the
induced maturation, spawning, larval rearing and settlement.
Perna viridis broodstock could be conditioned or induced to mature out of the spawning
season by maintaining them at 23 ± 1 • C, at > 30 ppt salinity, pH 7.5 - 8.2 and fed with
Chaetoceros calcitrans at a cell concentration of lx 10 5 ml-1 fortified with 700 I.U. cod liver oil @
1 I animal-1day-1 in two installments for 15 and 32 days respectively.
All increase of 5 • C form the ambient water temperature at a salinity> 25 ppt and pH 7 -
8.2 with an addition of male or female gametes was able to induce 100 % spawning in 1 -2 hours
in P. viridis. No sex wise pattem was observed. None of the commonly used chemicals like
Hydrogen peroxide or Serotonin was able to elicit a full spawning response.
Studies on the effect of Physico - chemical parameters for larval rearing of P. viridis
showed that a temperature of 29 • C - 31 • C at high salinity > 30 ppt with 50 ppm
Chloramphenicol antibiotic at pH 8.2, with moderate aeration and fed with lsochrysis galbana, as
the best for optimum growth, percentage survival and settlement of spat.
Settlement preference indicated clearly that primary settling larvae required filamentous
substrates and among these byssus threads was the best substrate even though presence of
adult mussels significantly attracted more mussels.than byssal threads. High temperature 31• C,
moderate aeration, salinity of 25 - 38 ppt, pH 7 - 8 was optimum for larval settlement.
Among the various chemicals tried L-DOPA gave the best results with 100 % settlement
observed in 5 hours at 2.5 x 10 -7 M.
Remote setting was also successfully done with larvae transported in ambient moist
condition. A 24 hour transportation period did not significantly affect the percentage of P. viridis
larval survival or settlement
 
Date 2001
 
Type Thesis
NonPeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/7136/1/TH-92_Man.pdf
Nair, Manoj R (2001) Studies on induced maturation, spawning and larval settlement in green mussel Perna viridis (Linnaeus, 1758). Doctoral thesis, Central Institute of Fisheries Education, Versova.