臺灣纓口鰍之生物學研究

The Biological Study of Crossostoma Lacustre

張明雄(Ming-Shung Chang) ； 呂光洋(Kuang-Yang Lue) ； 張巍薩(Wei-Sah Chang)

《師大生物學報》 24卷 (1989/12) Pp. 41-63

https://doi.org/10.29812/BBNTNU.198912.0004

摘要

Crossostoma lacustre were sampled by electro-fishing method and shrimp-traps in Yeau-Sheng Stream from January, 1988 to April, 1989. The biology of C. lacustre, including length-weight structure and growth were investigated.The results of length-weight indicated that C. lacustre is an allometric growth. The pattern of monthly maturation and gonadsomatic index (GSI) showed the reproductive cycle of C. lacustre starts from April to July with a peak on April-May. Data from of the ova-diameter distribution indicated that C. lacustre is a species of series spawning. The male reches to 70 mm. X^2-test indicated that sex ratios for is significantly different (p＜0.05) among 10 mm TL groups. The male dominated the TL groups from 50 to 90 mm whereas individuals above 90 mm were most female. The reproductive strategy of C. lacustre was discussed and tends to larger shape of female, series spawning and extended spawning season for the habitat.The proceeding length-frequency distribution of C. lacustrp could be divided into four age groups (0+, I+, II+ and above III+). Among these, 0+ groups and I+ groups were dominant. The mean monthly changes in length of 0+ groups and I+ groups indicated the growing season of C. lacustre was from July to Novermber.

關鍵字

台灣纓口鰍 ； 異速成長 ； 雌雄比例 ； 生殖週期 ； 卵徑分布 ； 族群結構

並列摘要

Crossostoma lacustre were sampled by electro-fishing method and shrimp-traps in Yeau-Sheng Stream from January, 1988 to April, 1989. The biology of C. lacustre, including length-weight structure and growth were investigated.The results of length-weight indicated that C. lacustre is an allometric growth. The pattern of monthly maturation and gonadsomatic index (GSI) showed the reproductive cycle of C. lacustre starts from April to July with a peak on April-May. Data from of the ova-diameter distribution indicated that C. lacustre is a species of series spawning. The male reches to 70 mm. X^2-test indicated that sex ratios for is significantly different (p＜0.05) among 10 mm TL groups. The male dominated the TL groups from 50 to 90 mm whereas individuals above 90 mm were most female. The reproductive strategy of C. lacustre was discussed and tends to larger shape of female, series spawning and extended spawning season for the habitat.The proceeding length-frequency distribution of C. lacustrp could be divided into four age groups (0+, I+, II+ and above III+). Among these, 0+ groups and I+ groups were dominant. The mean monthly changes in length of 0+ groups and I+ groups indicated the growing season of C. lacustre was from July to Novermber.

並列關鍵字

Crossostoma lacustre ； Allometric growth ； Sex ratio ； Reproductive cycle ； Ova-dimeter distributrion ； Population structure