Determination of entrance seasons of elvers (Anguilla anguilla L., 1766) in Gozlen Creek and assessment of different catching methods


Kucuk F., Gumus E., Gulle I.

TURKISH JOURNAL OF VETERINARY & ANIMAL SCIENCES, cilt.29, ss.1061-1066, 2005 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 29 Konu: 4
  • Basım Tarihi: 2005
  • Dergi Adı: TURKISH JOURNAL OF VETERINARY & ANIMAL SCIENCES
  • Sayfa Sayıları: ss.1061-1066

Özet

This study was carried out in Gozlen Creek, located on the Fethiye-Mugla boundary Turkey, between March to July. 1998, and January to July, 1999. Elvers were collected using trap-nets, drift nets, hand scoop nets and electrofishing equipment. Examination indicated that the highest yield was obtained using hand scoop nets (P < 0.05) and electrofishing equipment. Elvers entered Gozlen Creek between February and July. A total of 214 specimens entering the creek were examined and 3 different groups were established according to their morphological characteristics: average weight (W) group 1; 0. 166 +/- 0.007 g, group II; 0.392 +/- 0.02 g, group III; 0.800 +/- 0.06 g and average total length (L) group I; 56.16 +/- 0.06 mm: group 11; 64.39 +/- 0.11 mm and group III; 82.02 +/- 0.18 mm. The length-weight relation of elvers was calculated using regression analysis and was determined as follows: group I; W = 0.0020*L-2.5327, group II; W = 0.0015*(2.9516), and group III; W 0.0023*L-2.7090. The condition factor (C) was determined as 0.209 +/- 0.009 for group I; 0.154 +/- 0.004 for group II and 0.251 0.009 for group III.