Gözle Görülebilir Fluorescent Elastomer (VIE) Markalaman›n Tatlı Su Istakozu’nun, Procambarus acutus acutus (Girard, 1852), Büyüme, Kabuk Değişimi ve Yaşama Oranı Üzerine Etkisi

Bu çal›flmada, 35-37 mm boyundaki kerevitlerde, Procamborus acutus acutus, markalaman›n büyüme, kabuk de¤iflimi ve yaflama oran› üzerine etkisi araflt›r›lm›flt›r. Markalanan ve markalanmayan kerevitler, kabuk de¤ifltirme ve yaflama oran› bak›m›ndan istatistiksel olarak bir fark göstermemifltir (P > 0,05). Plastik küvetlerde bireysel olarak 60 gün süresince bak›lan kerevitlerde marka tutum oran› % 100 olarak bulunmufltur. Markalanan kerevitlerde büyüme oran› 7,0 mm iken bu oran markalanmam›fl grupta 4,0 mm olarak bulunmufltur. Markalanm›fl ve markalanmam›fl grubundaki kerevitler kabuk de¤iflimi oran› bak›m›ndan benzer olup, her iki grupta da 9’flar adet kerevitin kabuk de¤ifltirdi¤i gözlenmifltir. Yaflama oran› ise, markalanm›fl ve markalanmam›fl grupta % 96,6 olarak bulunmufltur. K›sa süreli cal›flmalarda, markalaman›n, kabuk de¤ifltirme ve yaflama oran› üzerine etkili olmamas›na ra¤men, büyüme üzerine etkili oldu¤u görülmüfltür (P < 0,05).

Anahtar Kelimeler:

Kerevit, büyüme, kabuk de¤iflimi, yaflama oran›

Influence of Visible Implant Fluorescent Elastomer (VIE) Tagging on Growth, Molting and Survival of the Eastern White River Crayfish, Procambarus acutus acutus (Girard, 1852)

Tag retention, growth, molting, and survival of crayfish, Procambarus acutus acutus, 35-37 mm in total length were evaluated between tagged and untagged groups. There were no significant differences in molting and survival between the tagged and untagged groups (P > 0.05). Tag retention was 100% for crayfish kept individually in plastic containers for the 60-day experimental period. The tagged group had a mean growth of 7.0 mm (molts only) while the untagged group had a mean growth of 4.0 mm (molts only). Molting rates were similar between the tagged and untagged groups. Nine molts were observed each in the tagged (n = 30) and untagged (n = 30) groups, respectively. Survival rates were 96.6% for both groups. Although the tags did not affect molting or survival, they did significantly affect the growth of crayfish in the short term (P < 0.05).

Keywords:

Crayfish, growth, molting, survival,

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