A Study on Determining the Ideal Stock Density of Freshwater Crayfish (Pontastacus leptodactylus) in Polyculture with Rice (Oryza sativa L.)


BERBER S., KALE S., BULUT M., İZCİ B.

KSU TARIM VE DOGA DERGISI-KSU JOURNAL OF AGRICULTURE AND NATURE, vol.22, no.6, pp.953-964, 2019 (Peer-Reviewed Journal) identifier

  • Publication Type: Article / Article
  • Volume: 22 Issue: 6
  • Publication Date: 2019
  • Doi Number: 10.18016/ksutarimdoga.vi.544561
  • Journal Name: KSU TARIM VE DOGA DERGISI-KSU JOURNAL OF AGRICULTURE AND NATURE
  • Journal Indexes: Emerging Sources Citation Index, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.953-964

Abstract

This paper aims to determine optimum stock density for rice-crayfish rearing in controlled environment. Juvenile freshwater crayfish (Pontastams ieptodady/us) obtained in the laboratory condition from female freshwater crayfish were stocked into rice planted artificial pond at different stock densit ies (25 individuals m(-2), 50 individuals m(-2), and 100 individuals m(-2)) for the assessment of paddy field areas in terms of field fisheries in Turkey. Results showed that the best survival rate (72%) and growth for juvenile freshwater crayfish in point of length and weight has been observed at the stock density of 25 individuals m(-2). In addition, statistically significant difference has been found between this stock density and the other stock densities (p<0.05). The maximum survival rate was observed as 72% at the stock density of 25 individuals m(-2). The results of this study are significantly different when compared with Other feeding researches on juvenile freshwater crayfish in Turkey. The stock density of 25 individuals m(-2) should be applied to gain maximum yield in rice- crayfish rearing experiments suggested as an alternative met hod for crayfish rearing. This paper. the first study on the investigation of different stock density for rice-crayfish rearing, will shed light on the further researches.