Manyas Gölü (Balıkesir) tatlısu istakozunun (Astacus leptodactylus Eschscholtz, 1823) bazı büyüme ve morfometrik özelliklerinin belirlenmesi

Bu araştırma Manyas Gölü’nde yaşayan tatlısu istakozunun (Astacus leptodactylus Eschscholtz, 1823) bazı büyüme ve morfometrik özelliklerinin belirlenmesi amacıyla Nisan 2002-Mart 2003 tarihleri arasında yakalanan 1118 tatlısu istakozu (387 dişi, 731 erkek) üzerinden gerçekleştirilmiştir. Araştırma boyunca yakalanan tatlısu istakozlarının %65,4’ü erkek, %34,6’s dişi birey olarak tespit edilmiş ve dişi/erkek oranı 0,53/1,00 olarak hesaplanmıştır. Populasyondan alınan bireylerin karapaks boyu 15-78 mm arasında, total ağırlığı ise 0,5-130,4 g arasında değişim göstermektedir. Dişi bireylerin ortalama karapaks boyları 43,16 mm, erkek bireylerin ise 41,67 mm olarak tespit edilmiştir. Boy gruplarına göre populasyonda avlanabilir boyun (≥90mm) üzerindeki bireylerin oranı %27,82 olarak saptanmıştır. Tatlısu istakozlarının Total Boy, Karapaks Boyu, Karapaks Genişliği, Abdomen Boyu, Abdomen Genişliği, Total Ağırlık, Abdomen Ağırlığı, Karapaks Ağırlığı, Kıskaç Ayak Boyları, Kelipet Boyları, Kelipet Genişlikleri, Kelipet Ağırlıkları gibi metrik özellikler ile Karapaks Boyu/Total Boy, Karapaks Boyu/Abdomen Boyu, Karapaks Genişliği/Karapaks Boyu, Abdomen Boyu/Total Boy, Abdomen Genişliği/Abdomen Boyu, Abdomen Genişliği/Karapaks Genişliği, Kelipet Boyu/Kıskaç Ayak Boyu, Kelipet Genişliği/Kelipet Boyu oranlarının eşeyler arasındaki farkı istatistiksel açıdan önemli bulunmuştur (p

Anahtar Kelimeler:

Balıkesir, Astacus leptodactylus, morfometri, kerevit, büyüme

Determination of traits some growth and morphometric of crayfish (Astacus leptodactylus Eschscholtz, 1823) at Manyas Lake (Balıkesir).

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.

Keywords:

Balikesir, Astacus leptodactylus, morphometrics, crayfish, growth,

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