Search Results

1 results returned.
To copy the URL of a document, Right Click on the document title, select "Copy Shortcut/Copy Link", then paste as needed. Only documents available to the public have this feature enabled.
Title Sort descending Sort ascending Primary
Author Sort ascending Sort descending
Date Sort ascending Sort descending
Abstract / Details
View
Hard
copy
Habitat Use by Chiselmouth (Acrocheilus alutaceus) in the Blackwater River Rosenfeld, Jordan
1998
A
D
Abstract: In order to understand habitat use and selection by chiselmouth within a single drainage, chiselmouth were intensively sampled throughout the Blackwater drainage. Fifty sites were sampled on the Blackwater and its tributaries during the summer and fall of both 1996 and 1997. Sites ranged from mainstem habitats on the Blackwater, Nazko, Euchiniko, Baezaeko, and Coglistiko, to small headwater streams. Chiselmouth were exclusively collected at mainstem river sites where bankfull width exceeded 10 m. Within these sites, chiselmouth were collected from a range of hydraulic units, including runs, riffles, glides, backwaters and pools with coarse substrate. Adult chiselmouth were typically found in deeper, higher velocity runs and glides with a high proportion of cobble and some boulder substrate, although they were also collected from deeper pools. Juveniles were usually found in slow velocity habitats, typically vegetated backwaters and sidechannels. Squawfish, Peamouth Chub and Redside Shiners were usually collected at the same sites as chiselmouth. Although adults of these species did not appear to be using precisely the same microhabitats, juveniles typically occurred in mixed schools of all four species. Juvenile chiselmouth were consistently rare in the Blackwater, never accounting for more than 5% of the individuals in mixed assemblages. Adults could be locally more abundant and would occur in schools, but never accounted for more than 20% of the fish community at a site. Spawning and overwintering habitats were not successfully established using internal radio transmitters due to high mortality of the five chiselmouth that were radiotagged, and spawning locations in the Blackwater remain unknown. If riverine populations of chiselmouth ...
 
Rosenfeld, Jordan, Wicks, Bev; Porter, Marc; Van Dishoek, Pier. 1998. Habitat Use by Chiselmouth (Acrocheilus alutaceus) in the Blackwater River. Ministry of Fisheries. Fisheries Project Report. RD75
 
Topic: Fish and Fish Habitats
Keywords: habitat selection, habitat use, hydraulic units, microhabitats, spawning habitat, overwintering habitat, squawfish
ISSN:  Scientific Name: Acrocheilus alutaceus, Ptychocheilus oregonensis, Richardsonius balteatus, Mylocheilus caurinus
ISBN:  English Name: Chiselmouth, Pikeminnow, Peamouth, Redside Shiner
Other Identifier: FPRRD75, FPR RD75, FPR RD 75
 
To copy the URL of a document, Right Click on the document title, select "Copy Shortcut/Copy Link", then paste as needed. Only documents available to the public have this feature enabled.

EIRS Search Options

Useful Contacts