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Journal of the Marine Biological Association of India
Observations on post-larval prawns from the Godavari estuarine systems with a note on their role in capture and culture fisheries
The recruitment pattern of the larval and post larval penaeids, Penaeus monodon and Metapenaeus monoceros, into the Godavari estuarine system on the east coast fo India, during the years 1959-60, 1960-61 and 1961-62, are discussed in detail together with a note on their morphological features for distinguishing them from other post-larval penaeids. The flood waters supress the tidal oscillations in the estuary from July till October but from November typical estuarine conditions with flood and ebb tides, become established and remain so till June. The present observations were made during the latter period when the salinity and water temperature ranged between 4.85 % and 31.21 % and 21.2oC and 31.8oC respectively. The post larvae of P. monodon and M. monoceros were available throughout the period of observation but their numbers were generally maximum during the periods November-January and April-June. The post-larval incursion was rich during both the full moon and new moon periods. The rate of recruitment was however, relatively more at night than during the day. The Mysis stages of Metapenaeus spp. generally found in more numbers near the bottom than at the surface.
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