Habitat Preference of the Stream Fish, Sinogastromyzon puliensis (Homalopteridae)

埔里中華爬岩鰍之棲地喜好

于錫亮(Shyi-Liang Yu)；李德旺(Teh-Wang Lee)

魚類族群 ； 特有種 ； Fish population ； Endemic species

Zoological Studies

41卷2期（2002 / 04 / 01）

183 - 187

英文

本研究從1997年7月至1999年6月二年間調查埔里中華爬岩鰍在臺灣之分布及其與棲地環境的關係，埔里中華爬岩鰍分布於臺灣西部的高屏溪、曾文溪、濁水溪、大肚溪及大甲溪五條流域之海拔25-340公尺之河段，深度、流速和導電度為影響埔里中華爬岩鰍族群分布最重要的環境因子，埔里中華爬岩鰍喜好棲地為深度介於20-60cm，流速為0.8-2m/s，底質為小巨石的水域。

Understanding habitat preference is an important consideration for the management of fish populations. We used multiple regression to describe relationships between environmental variables and catch-per-unit-effort (CPUE) of Sinogastromyzon puliensis (Homalopteridae). Fish and habitat data were collected in the Kaoping, Tsengwen, Choshui, and Tatu Rivers from July 1997 to June 1999 in western Taiwan. Electrofishing was used to collect fish in grids, and environmental variables in the sampled areas were measured immediately after sampling. Multiple regression showed that the most parsimonious model includes the linear effects of depth, velocity, and conductivity. The highest behavioral preference for depth occurred at 60 cm; it was similar between 20 and 40 cm and declined for very shallow and very deep water. S. puliensis preferred a wide range of velocities of between 0.8 and 2 m/s. Preference of substrate was highest for small rocks, and similar for pebbles and big rocks.