Journals / Turkish Journal of Zoology / 2007 / Cilt: 31 - Sayı: 3
Influence of Visible Implant Fluorescent Elastomer (VIE) Tagging on Growth, Molting and Survival of the Eastern White River Crayfish, Procambarus acutus acutus (Girard, 1852)
- Journal
- Turkish Journal of Zoology
- Pages
- 209–212
- DOI
- —
Abstract
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).
Özet
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).