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    Determination of traits some growth and morphometric of crayfish (Astacus leptodactylus Eschscholtz, 1823) at Manyas Lake (Balikesir)
    (Ege Univ, 2006) Berber, Selcuk; Balik, Suleyman
    The aim of research was to determine traits of some growth and morphometric of crayfish live at Manyas Lake and the research was used 1118 crayfish (387 female, 731 male). In the research was found as 65.4 percent male, 34.6 female of crayfish thought investigation female and male ratios was of determined as to 0.53/1.00. Carapace length and totally weight of member of populations were between 15 mm - 78 mm; 0.5 g - 130.4 g and carapace length of female member and male member is 43.16 mm; 41.67 mm respectively. Metric traits of crayfish Totally Length, Carapace Length, Carapace Width, Abdomen Length, Abdomen Width, Totally Weight, Abdomen Weight, Carapace Weight, Cheliped Length, Chelae Length, Chelae Width, Chelae Weight and Carapace Length/Totally Length, Carapace Length/Abdomen Length, Carapace Width/Carapace Length, Abdomen Length/Totally Length, Abdomen Width/Abdomen Length, Abdomen Width/Carapace Width, Chelae Length/Cheliped Length, Chelae Width/Chelae Length, ratios were found significant between male and female statistically. Accordingly to results of regression analysis was found negative allometric growth of female crayfish, isometric growth of male crayfish, and negative allometric growth all of the populations.
  • [ X ]
    Öğe
    Some reproduction properties of Crayfish (Astacus leptodactylus Eschscholtz, 1823) in Demirkopru Dam Lake
    (Ege Univ, 2006) Balik, Suleyman; Ustaoglu, M. Rusen; Sari, Hasan M.; Berber, Selcuk
    In this study, the fecundity, egg diameter and weight of freshwater crayfish in Demirkopru Dam Lake were investigated. It was identified that fecundity 137 relative fecundity 5, average egg diameter-weight 2.72 mm-0.015 g(-1), result of investigation on 92 female with egg. The total length-fecundity and weight-fecundity relationships were deduced as; logF= -6.7999+4.4934 logL and logF= -0.1809+1.6145 logW, respectively. This show that the fecundity is affected much more by total weight than that of length. It is found that the fecundity of female individuals having a total length between 72.8-123.9 mm ranges from 6 to 286.