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Reproductive Biology of Neocaridina denticulata denticulata and Latreutes planirostris

새뱅이와 넓적뿔꼬마새우의 생식생물학적 연구

  • Jeong In-Ju (Department of Oceanography, Chonnam National University) ;
  • Oh Chul-Woong (Department of Marine Fisheries Resources, Mokpo National University) ;
  • Ma Chae-Woo (Division of Life Sciences, Soonchunhyang University)
  • 정인주 (전남대학교 해양학과) ;
  • 오철웅 (목포대학교 해양수산자원학과) ;
  • 마채우 (순천향대학교 생명과학부)
  • Published : 2006.05.01

Abstract

We investigated the fecundity, egg size, reproductive output, and breeding frequency and season of Neocaridina denticulata denticulata and Latreutes planirostris which inhabit extremely different habitats. The marine shrimp Latreutes planirostris produced more eggs had at a given carapace length than the freshwater shrimp N. d. denticulata. However, N. d. denticulata had a larger egg volume and greater reproductive output than L. planirostris. The monthly gonadosomatic index (GSI) of the freshwater shrimp began to increase in April and reached a maximum in May, suggesting a single breeding period. In contrast, the GSI of the marine shrimp exhibited two breeding peaks: May-June and September. In both shrimps, the regressions between carapace length and ovarian weight were significant at the non-eyed and eyed embryo stages. For both species, an analysis of covariance revealed significant difference between the two regressions in elevation, but not in slope. These results indicate the potential for multiple ovulations within the reproductive season.

Keywords

References

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