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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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    Abstract - Issue Mar 2009, 29 (2)                                     Back


Reproduction 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)

 

 

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