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Studies on ovarian maturation and larval development of Penaeus merguiensis de Man in captivity

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Relation http://eprints.cmfri.org.in/7138/
 
Title Studies on ovarian maturation and larval development of Penaeus merguiensis de Man in captivity
 
Creator Zacharia, Sherly
 
Subject Hatchery
Aquaculture
Theses
Farming/Culture
Prawn and Prawn fisheries
 
Description The upsurge in recent years in the world food market and
uncertainities of capture fisheries has helped in the intensification of global
effort on shrimp aquaculture. Penaeus merguiensis de Man, popularly known
as Banana shrimp, is an important candidate species with high potential for
farming and hence was selected for the present study. The fundamental
aspects of its reproductive physiology and larval development were
investigated. Eyestalk ablation is the most commonly employed method to
induce maturation of shrimps in hatcheries worldwide. Hence in the present
study, eyestalk ablations were carried out on adult females of different sizes
under varying environmental conditions to induce maturation. Successful
results were obtained when ablated females were maintained in marine
conditions compared to brackishwater environment, while no effect was
visible when females of smaller sizes were subjected to similar treatments.
Females ablated during the colder months of the year had a delayed
response of ovarian maturation. Administration of exogenous substances
like cerebral and thoracic ganglionic extracts and 5-hydroxytryptamine
resulted in a significant increase in GSI, while the increase in GSI was not
statistically significant when shrimps were administered 17-a
hydroxyprogesterone. Larval rearing of P. merguiensis at different
salinity and temperature combinations showed that the development during
nauplius to postiarval stages was faster at 33°C and 35%oeompared to other
tested salinity and temperature combinations. During the postiarval stages
maximum survival and growth was observed at 15%0. The ability of P.
merguiensis to reach maturation in captive environment, together with the
fast growth rate and tolerance of larvae to a wide range of salinity and
temperature combinations in captivity, indicates P. merguiensis to be a
promising candidate species for aquaculture.
 
Date 2001
 
Type Thesis
NonPeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/7138/1/TH-94_She.pdf
Zacharia, Sherly (2001) Studies on ovarian maturation and larval development of Penaeus merguiensis de Man in captivity. ["eprint_fieldopt_thesis_type_phd" not defined] thesis, Central Institute of Fisheries Education, Versova.