National Aquatic Resources Research & Development Agency (NARA)

Factors influencing migration of metapenaeus dobsoni (Miers,1878) in the Negombo Lagoon (Record no. 9692)

MARC details
000 -LEADER
fixed length control field nam a22 7a 4500
003 - CONTROL NUMBER IDENTIFIER
control field OSt
005 - DATE AND TIME OF LATEST TRANSACTION
control field 20190126165733.0
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
fixed length control field 181214b xxu||||| |||| 00| 0 eng d
040 ## - CATALOGING SOURCE
Transcribing agency NARA
100 ## - MAIN ENTRY--PERSONAL NAME
9 (RLIN) 17948
Personal name Jayawardena, P.A.A.T.
245 ## - TITLE STATEMENT
Title Factors influencing migration of metapenaeus dobsoni (Miers,1878) in the Negombo Lagoon<br/>
260 ## - PUBLISHER, DISTRIBUTION, ETC.
Date of publication, distribution, etc. 2003,
300 ## - PHYSICAL DESCRIPTION
Extent 439-453p.
440 ## - SERIES STATEMENT/ADDED ENTRY--TITLE
9 (RLIN) 17950
Title Indian Journal of Fisheries
Number of part/section of a work ; Vol.50, No.4
505 ## - FORMATTED CONTENTS NOTE
Formatted contents note The factors influencing migration of M. dobsoni in the Negombo lagoon, Sri Lanka are presented. Juveniles of M. dobsoni occur in the Negombo lagoon and on maturing they return to the sea off Negombo for reproduction. The cohort analysis indicated two pulses of immigration to the nursery areas in February and June. The estimated growth rates for juveniles were relatively high com­ pared to that of adults. Three groups of shrimps were identified in the lagoon : small quick movers, larger long stay ones and an intermediate group. Emigra­ tion is not restricted to maturing juveniles but occurs across all the ages. There were few identifiable emigration pulses from lagoon towards the off shore ar­eas. It appears that the resultant osmotic stress due to low saline waters in the lagoon during the periods with high precipitation levels may be the strongest influence triggering the onset of emigration of shrimps.
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Koha item type Research Papers
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        NARA Main Library NARA Main Library Ready Reference 06.08.2009 RP0021   RP0021 26.01.2019 RP0021 06.08.2009 Research Papers

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