1998 Arctic Grayling (Thymallus Arcticus) Surveys in the Table, Anzac and Parsnip Rivers PDF Download
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Languages : en
Pages : 54
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Book Description
This report describes a 1998 study of Arctic grayling life history & habitat utilization on three rivers in the Williston Reservoir watershed of British Columbia. Introductory sections describe the study area (the Table River, Anzac River, and the 25-kilometre section of the Parsnip River between the Table & Anzac rivers) and methodology. The research included collection of water temperature data, an egg deposition survey, fry distribution surveys, sampling of young of the year, sampling of suitable habitats, mark recapture studies, and collection of biological information from sampled grayling. Results are presented & discussed with regard to water temperature trends, abundance & distribution of grayling fry, fish density, habitat utilization, characteristics of suitable habitats, abundance of adult grayling & other sport fish (trout, whitefish), age class distribution of grayling, and juvenile growth rates. Based on the findings, management implications & research needs are discussed.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 54
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Book Description
This report describes a 1998 study of Arctic grayling life history & habitat utilization on three rivers in the Williston Reservoir watershed of British Columbia. Introductory sections describe the study area (the Table River, Anzac River, and the 25-kilometre section of the Parsnip River between the Table & Anzac rivers) and methodology. The research included collection of water temperature data, an egg deposition survey, fry distribution surveys, sampling of young of the year, sampling of suitable habitats, mark recapture studies, and collection of biological information from sampled grayling. Results are presented & discussed with regard to water temperature trends, abundance & distribution of grayling fry, fish density, habitat utilization, characteristics of suitable habitats, abundance of adult grayling & other sport fish (trout, whitefish), age class distribution of grayling, and juvenile growth rates. Based on the findings, management implications & research needs are discussed.
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Category :
Languages : en
Pages : 15
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Book Description
This report describes & presents results of a field program carried out in 2000 on rivers in the Williston Reservoir watershed of British Columbia to gather information on Arctic grayling. The program included beach seine sampling of grayling juveniles along the Parsnip River and underwater counts at index sites along the Table & Anzac rivers to obtain estimates of grayling adults. Results related to the distribution & relative abundance of Arctic grayling are compared to those of a similar program conducted in 1998.
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Category :
Languages : en
Pages : 25
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Book Description
As part of ongoing investigations to determine the status of Arctic grayling in the Williston watershed in northern British Columbia, two large tributary streams of the Williston Reservoir were examined to determine Arctic grayling distribution, relative abundance, and habitat use. This report presents findings of electrofishing surveys that looked for the presence of Arctic grayling in the Omineca and Osilinka rivers. Observations of grayling fry habitat use are compared to studies conducted on the Table & Anzac rivers in the Parsnip River drainage of the Williston watershed. Results are also presented from angling surveys that collected information on adult grayling distribution.
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Category :
Languages : en
Pages : 39
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Book Description
This report concerns part of a program to conserve & restore Arctic grayling stocks & habitat in the Williston watershed of British Columbia. It describes a study conducted to determine migratory patterns, overwinter distribution & habitat, and spawning areas & habitats of Arctic grayling in the Table & Anzac rivers, both tributaries of the Parsnip River. In the study, 55 grayling were captured, surgically implanted with radio transmitters, and released back into the Table & Anzac rivers. The fish were tracked by aerial radio telemetry on a monthly basis during the winter of 1996-97 to identify overwinter locations and on a biweekly basis in April once migrations had started. Tracking flight frequency was increased to weekly during the suspected spawning period (May & June) and then monthly until October. In addition, underwater surveys were conducted in September to verify conditions of tagged fish. Results are presented & discussed regarding survival rates; migrations to overwintering, spawning, & summer feeding areas; and spawning area characteristics. The final section discusses management implications based on the findings.
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Category : Aquatic sciences
Languages : en
Pages : 772
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Book Description
