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Journal of Environmental BiologypISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP |
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Abstract - Issue Mar 2009, 29 (2) BackReproduction and growth of the freshwater
prawn, Palaemon paucidens (Decapoda: Palaemonidae) in a lake of Korea Jong Chun
Kim1, Chae Woo Ma*1, Chul Woong Oh2 and Sang
Gyu Paik3 1Department of Marine
Biotechnology, Soonchunhyang University, Asan, Chungnam - 336 745, Korea 2Department of Marine
Biology, Pukyung National University, Busan - 336 745, Korea 3Marine Ecosystem and
Environment Research Division, Korea Ocean Research and Development Institute, Ansan
P.O. Box 29, 425 600, Korea (Received: April 09, 2007 ; Revised
received: August 02, 2007 ; Accepted: September 15, 2007) Abstract: This
study analyzed the reproduction and growth of freshwater prawn, Palaemon
paucidens De Haan 1844 from Suk-dang lake( Korea). The analysis of the sex
ratio showed a higher proportion of males than that of females. The average
size of the eggs was 6.12 (? 0.55) mm3 in the non-eyed stage (stage A) and
7.20(?0.86)mm3 in the eyed stage (stage B). The reproductive output (RO)
calculated with the dried-body weight of an incubating female and the weight of
the eggs in dried condition was 26.97% (n = 17) of the average females weight. Incubating
prawn appeared in April, and the gonadosomatic indices(GSI) showed the highest
value during three months from January to March. Based on the month when there
was a high proportion of incubating females with a high GSI, the estimated
spawning season of P. paucidens was April. The maturity of the female was evaluated
by the development of the ovaries and the existence of eggs. The average body
length when 50% of the females in the group reached maturity was 8.55 (?2.74)
mm. The analysis of the length-frequency distribution showed that the life span
of P. paucidens ranged from 12 to 13 months. Females mature faster than males. Key words: Palaemon
paucidens, Growth, Sex ratio, GSI, Fecundity, Reproduction intensity PDF of full length paper is available with author (cwooma@sch.ac.kr) Copyright ? 2008 Triveni
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