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Histological and morphological changes associated with ovarian development of speckeled shrimp Metapenaeus monoceros (Fabricius, 1798) conservation and management

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Relation http://eprints.cmfri.org.in/8933/
 
Title Histological and morphological changes associated with ovarian
development of speckeled shrimp Metapenaeus monoceros
(Fabricius, 1798)
conservation and management
 
Creator Abraham, Joice
Manisseri, Mary K
 
Subject Conservation
Fisheries Management
Prawn and Prawn fisheries
 
Description Histological techniques and gonadosomatic index (GSI) were applied to validate macroscopic classification of ovaries in
Metapenaeus monoceros. The five ovarian maturity stages based on gross morphology were correlated with those based on
histomorphology viz., pre-vitellogenic, early vitellogenic, late vitellogenic, vitellogenic and spent. Mean values of GSI
increased from 0.353 (immature ovary) to 6.98 (fully mature), thus recording a 20-fold increase. Pre-vitellogenic ovary
contained primary oogonial cells, secondary oogonial cells and pre-vitellogenic oocytes. Early vitellogenic stage was
characterized by the dominance of perinucleolar oocytes. Folliculogenesis commenced during this stage. Late vitellogenic
and vitellogenic ovaries were characterized by rough granular cytoplasm which was fully eosinophilic due to accumulation
of yolk and the mean ova diameters during these stages were 170 μm and 230 μm respectively. Cortical rods, which are
characteristic features of fully mature oocytes of penaeid shrimp were not encountered during the present study in any of the
oocyte development stage.
 
Date 2012
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/8933/1/Joice_Abraham.pdf
Abraham, Joice and Manisseri, Mary K (2012) Histological and morphological changes associated with ovarian development of speckeled shrimp Metapenaeus monoceros (Fabricius, 1798) conservation and management. Indian Journal of Fisheries, 59 (1). pp. 119-124.