IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
Log On
About IAHRDirectoryCommitteesMy IAHRNews & JournalseLibraryeShopEventsJoin IAHRWorld CongressDonate
spacer.gif
spacer.gif eLibrary
spacer.gif eLibrary
You are here : eLibrary : IAHR World Congress Proceedings : 34th Congress - Brisbane (2011) : THEME 5: Environmental Hydraulics and Hydrology : Ensuring effective rehabilitation and translocation: genetic diversity of freshwater sculpins (cottu...
Ensuring effective rehabilitation and translocation: genetic diversity of freshwater sculpins (cottus pollux)
Author : K. Muraoka1, S. Yamashita1, M. Nakayama2, and J.Miwa1
The entire length of the Honmyo River on the Island of Kyushu in Japan has been modified for flood control. The construction of large weirs and sabou dams along the river has resulted in the fragmentation of indigenous sculpin populations, and only a 1 km stretch of suitable sculpin habitat is considered to remain. As part of a program to conserve this species, 81 individuals were translocated to the upper reaches of dams and a tributary. Genetic assays of Cottus pollux caught at 8 sample sites along the length of the river indicated that the populations in the upper river reaches are important for the recruitment of river reaches further downstream. Furthermore, it was assumed that there were other factors impacting the reproduction of this species. Our results show that rehabilitation of the spawning beds in the upper river reaches is valuable for ensuring the continued survival of the native population. In addition, translocation of several generations of fish is important for ensuring the continued survival of the sculpin populations.
File Size : 2,813,509 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 34th Congress - Brisbane (2011)
Article : THEME 5: Environmental Hydraulics and Hydrology
Date Published : 01/07/2011
Download Now