The importance of habitat continuity between Lake Biwa and inlet rivers with respect to fish fauna
-
- Ishizaki Daisuke
- 滋賀県水産試験場 滋賀県農政水産部水産課
-
- Kikko Takeshi
- 滋賀県水産試験場 滋賀県農政水産部水産課
-
- Fujioka Yasuhiro
- 滋賀県水産試験場
-
- Mizuno Toshiaki
- 滋賀県琵琶湖環境科学研究センター
-
- Nagata Takamaru
- 滋賀県琵琶湖環境科学研究センター
-
- Yodo Taiga
- 三重大学大学院生物資源学研究科
-
- Okubo Takuya
- 滋賀県琵琶湖環境科学研究センター 滋賀県立大学環境科学部
Bibliographic Information
- Other Title
-
- 魚類の生息環境からみた琵琶湖と流入河川とのつながりの重要性
- ギョルイ ノ セイソク カンキョウ カラ ミタ ビワコ ト リュウニュウ カセン ト ノ ツナガリ ノ ジュウヨウセイ
Search this article
Description
<p>Although ca. 67 indigenous fish species and subspecies inhabit the Lake Biwa water system, (Shiga Prefecture, central Japan), including many endangered taxa, studies on the continuity of fish habitat between Lake Biwa and inlet rivers are few. The distribution pattern of fishes in 6 inlet rivers around Lake Biwa was examined during 2011–2012, with 32 and 26 fish species/ subspecies being recorded in autumn and spring, respectively. The relationships between presence/absence of these species and 21 physical environmental factors were analyzed by generalized linear mixed model, the results for 12 species in autumn and 4 species in spring being appropriate for predictability. Distance from the river mouth and number of dams from the river mouth were significant variables for Plecoglossus altivelis altivelis and Cottus reinii in autumn, suggesting that both species were influenced by dams. However, riparian plants were significant for Lake Biwa trout (Oncorhynchus sp.) in autumn, suggesting an important “shelter” component. Furthermore, water quality, including electrical conductivity and dissolved organic carbon, were significant for Tribolodon hakonensis in autumn. Other environmental conditions were more important for a number of other species. Clearly, active conservation of the inlet river environments and their continuity with Lake Biwa is necessary.</p>
Journal
-
- Japanese Journal of Ichthyology
-
Japanese Journal of Ichthyology 63 (2), 89-106, 2016-11-05
The Ichthyological Society of Japan
- Tweet
Keywords
Details 詳細情報について
-
- CRID
- 1390845712967173248
-
- NII Article ID
- 40021007136
- 130007382966
-
- NII Book ID
- AN00063212
-
- ISSN
- 18847374
- 00215090
-
- NDL BIB ID
- 027746396
-
- Text Lang
- ja
-
- Data Source
-
- JaLC
- IRDB
- NDL Search
- CiNii Articles
- KAKEN
- Crossref
-
- Abstract License Flag
- Disallowed