Sensitivity of British Columbia's Freshwater Fish to Timber Harvest : Using Species Traits as Predictors of Species Risk PDF Download
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Author: Gordon Robert Haas
Publisher:
ISBN: 9780772644299
Category : Fishes
Languages : en
Pages : 41
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Book Description
Author: Gordon Robert Haas
Publisher:
ISBN: 9780772644299
Category : Fishes
Languages : en
Pages : 41
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Book Description
Author: British Columbia. Ministry of Forests
Publisher:
ISBN:
Category : Sports & Recreation
Languages : en
Pages : 50
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Book Description
The British Columbia Forest Practices Code specifies planning and operational guidelines for each phase of timber harvesting operations around streams, lakes, and wetlands. This guide describes suitable practices to meet the objectives of the riparian management regulations within the Code, specifically the requirement to correctly identify streams on the basis of fish presence in order to ensure the protection of fish populations and habitats during all phases of forest harvesting. The guide defines the classes of streams distinguished for aquatic ecosystem and riparian zone management, identifies fish species that define a stream as fish-bearing under the Code, and describes factors influencing fish-stream identification such as stream reach, gradient, stream size, natural barriers, and fisheries sensitive zones. The guide concludes with methods for identifying fish streams, including measurement, sampling, data recording, and mapping procedures.
Author: Gordon Robert Haas
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 336
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Book Description
Author: University of British Columbia. Fisheries Centre
Publisher:
ISBN:
Category : Fishery resources
Languages : en
Pages : 12
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Book Description
Author: Cultus Lake Research Laboratory
Publisher: [Cultus Lake, B.C.] : Fisheries and Oceans Canada
ISBN:
Category : Freshwater fishes
Languages : en
Pages : 189
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Book Description
Author: Gordon Robert Haas
Publisher:
ISBN:
Category : Endangered species
Languages : en
Pages : 336
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Book Description
Author: Canada. Department of Fisheries and Oceans
Publisher: [Cultus Lake, B.C.] : Fisheries and Oceans Canada
ISBN:
Category : Fishes
Languages : en
Pages : 248
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Book Description
Author: Marlene Helene Marie Roberge
Publisher:
ISBN:
Category : Freshwater fishes
Languages : en
Pages : 0
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Book Description
Habitat requirements, specifically the lake habitat requirements, of 81 species and 13 additional subspecies and forms of freshwater fish that exist in British Columbia were summarized. Of the 94 freshwater species/subspecies, 78 occur in lakes for at least part of their life cycle. The remaining 16 species/subspecies either do not frequent lakes, or there was not sufficient information available on their lake habitat requirements. The life cycle stages defined in this report include the spawning period, young-of-the-year, juvenile and adult stages. Three habitat characteristics were summarized for each life stage. These include depth, substrate type and cover type. Overall, there is a general lack of information pertaining to the lake habitat requirements for the majority of the fish species that are found in BC. In particular, research and information on lake habitat requirements is lacking for the minnows, suckers, sculpins, lamprey, sticklebacks, and white sturgeon.
Author: Linda Yvonne Brooks
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Ootsa Lake is part of a 48-year-old northwestern British Columbia reservoir (Nechako Reservoir) that contains extensive amounts of flooded forests. Recently, logging companies have begun harvesting this standing underwater timber because of its potential as an alternative fibre source. This project was initiated because of the general lack of information on fishes in the reservoir and because the potential impact of submerged timber removal on the fish community had not previously been explored. Catches with experimental gill nets and live traps were monitored between July 7 and October 22, 1998 to estimate the abundance, diversity, size, and condition of fishes in Ootsa Lake. Catch per unit effort (CPUE) was quantified and ranked to evaluate the impact of submerged timber harvesting on the abundance of the dominant fish species. Mean ranks were compared across species; across three near-shore habitats with different levels of structural heterogeneity (treed, harvested, or open); and across the summer and fall seasons. Shannon-Wiener diversity indices were calculated and compared across habitats. Size and condition of the main fish species were compared across habitats. Fish abundance was positively associated with habitat structural complexity. Overall abundance was highest in the treed habitat. In the summer, rainbow trout (Oncorhynchus mykiss) abundance was highest in the treed habitat whereas northern pikeminnow (Pfychochei/us oregonensis) were abundant in both treed and harvested habitats. Rainbow trout and northern pikeminnow abundance in near-shore areas decreased in the fall, but numbers of kokanee (Oncorhynchus nerka) increased. Shannon-Wiener diversity indices did not differ significantly among habitats overall, but in the summer the index was significantly higher in the open than the treed and harvested habitats, whereas it was significantly lower in the fall. Sizes of rainbow trout, kokanee, and northern pikeminnow were related to habitat structural complexity with the smallest fish occupying the treed habitat and the largest rainbow trout and northern pikeminnow occurring in the open habitat. Fulton's condition factor was not consistently related to habitat structural complexity but differed among sites within habitat. Kokanee were found to be exceptionally small (mean fork length = 180 mm ~ 0.95) with over 85% of individuals being age 2+. They also exhibited characteristics similar to "residual" sockeye salmon (Oncorhynchus nerka) including a significantly male-biased sex ratio and olive-black spawning colouration. I hypothesize that kokanee are exhibiting adaptive life history patterns in response to the cold, oligotrophic conditions in this large reservoir. Juvenile fish often seek complex underwater structure for protection from predators, and submerged structure has been shown to increase invertebrate production. Therefore, it is likely that small rainbow trout and northern pikeminnow inhabit areas with submerged timber because it provides refuge from predators and/or because of a high abundance of food. The use of benthic harvested areas by small northern pikeminnow may be for similar reasons because overturned root wads and woody debris remain post-harvest. Diversity of fish species was not positively associated with habitat structural complexity.
Author: V. A. Poulin
Publisher: BC, Ministry of Forests
ISBN:
Category : Science
Languages : en
Pages : 32
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Book Description
Research in the Fish/Forestry Interaction Program was initiated in 1981 to resolve the conflicts between steep slope logging and the integrated management of fish and forest resources on the Queen Charlotte Islands. ?Field research provided a data base for evaluating alternative research strategies, developing a stratification methodology for extrapolation of study results, and determining the site descriptors required to assess impacts. This report describes the research approach and methodology adopted in this major interdisciplinary program.
