Intra-and inter-specific competition effects on survival and growth of juvenile Procambarus acutus acutus and Procambarus clarkii

Authors : Yavuz MAZLUM

Pages : 39-43

Doi:10.51756/marlife.949292

View : 21 | Download : 8

Publication Date : 2021-06-30

Article Type : Research Paper

Abstract :Four similar sizes eastern white river crayfish insert ignore into journalissuearticles values( Procambarus acutus acutus ); and red swamp crayfish insert ignore into journalissuearticles values( Procambarus clarkii ); were stocked separately to determine intra and inter-specific-competition. Three treatment levels were used three treatment levels, with six replicates tanks each with stand green rice insert ignore into journalissuearticles values(representing a stocking density of approximately 21 individuals per m2);. This study was carried out during 90 days to determine growth and survival rate. Results showed that the growth of P. acutus acutus in the interspecific treatment tank was found higher than those grown in the intraspecific-treatment tanks. For P. clarkii , no significant differences in growth insert ignore into journalissuearticles values(estimated from the mean Total length, TL); were detected between treatments. The survival of the two species was the same up to the first 60 days of the experiment, while the difference in survival was only noticeable at 90 days. The survival rate of P. clarkii in the intraspecific-treatment tanks insert ignore into journalissuearticles values(55.0%); was higher than in the interspecific tanks insert ignore into journalissuearticles values(26.7%); treatment, while the survival of P. acutus acutus was found similar in two treatments. It was achieved higher survival, faster growth and larger size in P. a. acutus than P. clarkii when grown in the tank study. Size of body was important in determining competitive interactions between the two species.
Keywords : crayfish, interactions, behaviour, Procambarus acutus acutus, Procambarus clarkii