封溪護魚政策對河川魚類資源量的影響

The Study on the Policy of Stream Fishing Restrictions for Abundance of Fish Resources

胡通哲(Tung-Jer Hu)

《農業工程學報》 62卷4期 (2016/12) Pp. 87-98

https://doi.org/10.29974/JTAE.201612_62(4).0006

摘要

本研究探討封溪護魚(漁)行為對魚類資源量影響，分別以封溪的5條溪流(九寮溪、松羅溪、新城溪、寒溪、灣潭溪)與未封溪的五條溪流(多望溪、粗坑溪、圳頭坑溪、東武荖坑溪、新寮溪)，以電捕法進行採集，分析的方法包含魚種數、生物整合指標IBI、相對重要值IRI (Index of Relative Importance)，在資源量方面，計算樣站的平均捕獲數量、單位長度捕獲量、單位面積捕獲量等，進行比較，發現封溪河段的資源量高出未封溪的河段。在相對重要值方面，分析的條溪流中，有7條溪以魚的重要值最高。

關鍵字

封溪 ； 相對重要值 ； 生物整合指標

並列摘要

This study focus on the policy for stream closing fishing restriction measures and discuss the abundance of fish resources for the policy. Fish were collected using an electric method from the streams of fishing restricted and non-restricted stream. The fishing restricted streams comprised the Jiuliao, Songluo, Xincheng, Han, Wantan, stream. The fishing non-restricted stream comprised the Douwang, Tsukeng, Zuntoukeng, Douwulaokeng, Xinliao stream. The indices used for analysis comprised the number of fish species, Index of Biotic Integrity (IBI), and Index of Relative Importance (IRI). Measurements of fish resources comprised the average abundance, the abundance of fish per meter, and the abundance of fish per square meter. The results of this study revealed that the fish resources of restricted streams were higher than those of non-restricted streams. The analysis of IBI and IRI values revealed that the minnow (Onychostoma barbatula) was the most abundant fish in 7 of the 10 streams investigated.

並列關鍵字

Stream Fishing Restriction ； Index of Relative Importance ； Index of Biotic Integrity