소양강 내 멸종위기종 II급 가시고기(Pungitius Sinensis)의 분포와 개체군 분석

초록

The purpose of this survey was to assess the population of Pungitius sinensis and develop strategies for the conservation and protection of this endangered species. In addition, the existing habitat of Pungitius sinensis. Fish fauna in the Soyang River were investigated thrice from May to November 2022. During these investigations, a total of 2,598 fish belonging to 11 families and 20 species were collected. Among them, Pungitius sinensis (2,522 individuals) was the dominant species, accounting for 97.07% of the total fish collected based on relative abundance. After measuring the length and weight, the distribution ranged from 13 to 80 mm in length, with an average length of 52.39 mm and a weight of 1.04 g. The analysis of the length-weight relationship and condition factor (K) revealed that both were slightly lower, with a length-weight relationship and condition factor of less than 3.0. However, values of 3.0 or higher and fluctuations in the condition factor (+) were observed at different times and locations, necessitating ongoing investigation. By analyzing the frequency distribution of total length, it was confirmed that the population of Pungitius sinensis has settled stably. The current year (0+), first year (1+), and second year (2+) were evenly distributed.

키워드