First Data on Some Biological Aspects of the Caucasian Goby, Ponticola constructor (Nordman, 1840) (Teleostei: Gobiidae) From the Lower Çoruh River Basin (NE Türkiye)

Yeşilçiçek T.

MARINE SCIENCE AND TECHNOLOGY BULLETIN, vol.11, no.4, pp.493-500, 2022 (Peer-Reviewed Journal) identifier

  • Publication Type: Article / Article
  • Volume: 11 Issue: 4
  • Publication Date: 2022
  • Doi Number: 10.33714/masteb.1184231
  • Journal Indexes: CAB Abstracts, Central & Eastern European Academic Source (CEEAS), Food Science & Technology Abstracts, Directory of Open Access Journals, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.493-500
  • Recep Tayyip Erdoğan University Affiliated: Yes


The present study describes for the first time some biological aspects (size composition, sex ratio, length-weight relationship and condition factor) of Ponticola constructor (Caucasian goby) inhabiting Borçka Dam Lake and its tributaries from the lower Çoruh River Basin located in the northeastern Türkiye Fish samples were caught from June 2017 to May 2018 by using trammel nets with various mesh sizes and by pulsed DC electrofishing device. A total of 145 Caucasian goby (78 females and 67 males) ranging from 6.8 cm to 13.4 cm TL were sampled during the study. The sex ratio of female to male was calculated as 1.16:1.00 which did not deviate from the expected ratio of 1:1 (χ² = 0.834, p˃0.05). The total length-weight relationships were determined as W= 0.016TL2.896 (r2=0.995, P˂0.05) for females, as W= 0.018TL2.841 (r2=0.993, P˂0.05) for males and as W= 0.017TL2.856 (r2=0.994, P˂0.05) for combined sex with the b-values were significantly different from isometric growth (b=3) indicating negative allometric growth of Caucasian goby for all sexes (Pauly’s t- test, P˂0.05). The regression analysis revealed that the coefficient of determination was r2>0.99 showing a highly significant correlation between total length and weight. The differences in slopes (b values) of the LWR were statistically significant for both sexes (ANCOVA, P