Incidental Catches of Harbour Porpoises, Phocoena Phocoena, in the Gillnet Fishery of the Estuary and Gulf of St. Lawrence in 2000-02 PDF Download
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Author:
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ISBN:
Category :
Languages : en
Pages : 37
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Book Description
This report examines the incidental catch of harbour porpoises in the gillnet fishery of the Estuary & Gulf of St. Lawrence, based on a questionnaire survey mailed to fishermen in 2000 & 2001 and on data from the At-Sea Observer & Sentinel Fisheries programs of 2001 & 2002. From these data, by-catch rates are estimated and differences in results among the data sources are discussed.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 37
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Book Description
This report examines the incidental catch of harbour porpoises in the gillnet fishery of the Estuary & Gulf of St. Lawrence, based on a questionnaire survey mailed to fishermen in 2000 & 2001 and on data from the At-Sea Observer & Sentinel Fisheries programs of 2001 & 2002. From these data, by-catch rates are estimated and differences in results among the data sources are discussed.
Author:
Publisher:
ISBN:
Category : Cetacea
Languages : en
Pages : 324
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Book Description
Author: Edward A. Trippel
Publisher: St. Andrews, N.B. : Fisheries and Oceans Canada
ISBN:
Category : Bycatches (Fisheries)
Languages : en
Pages : 42
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Book Description
The most serious threat to the status of harbour porpoise (Phocoena phocoena) is incidental mortalities caused by entanglement in fishing gear. As part of an ongoing study to evaluate the utility of mitigation techniques to reduce such harbour porpoise mortalities, observers were placed on-board vessels participating in the lower Bay of Fundy demersal gillnet fishery from 1998-2001. The number of vessels participating in the fishery declined from 22 in 1998 to 13 in 2001. Despite this decline, total annual effort remained relatively stable. Over the 4-yr period, a total of 52 porpoise mortalities were observed. all but four of which were in the Swallowtail region off Grand Manan, New Brunswick. For the Bay of Fundy, total estimated by-catch was 38, 32, 28, and 73 porpoises from 1998-2001, respectively. A lack of spatial and temporal observer coverage did not allow us to generate estimates of variance in by-catch estimates. In all years, the majority of the estimated porpoise by-catch occurred in the Swallowtail region. In general, by-catch was highest in July except in 1999 when it was highest in August. The increase in by-catch seen in 2001 was due to increased catch rates rather than increased effort. While the Canadian by-catch in 2001 appears low (73 porpoises), it was nearly as high as the U.S. by-catch (80 porpoises) which has a much larger fishery. Given that the Canadian by-catch appears to represent a significant source of mortality, observer coverage should be better allocated both spatially and temporally in the future so that more reliable by-catch estimates and their associated variance can be estimated
Author: Edward Alexander Trippel
Publisher:
ISBN:
Category : Gillnetting
Languages : en
Pages : 13
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Book Description
Author: Randall R. Reeves
Publisher: IUCN
ISBN: 2831706564
Category : Cetacea
Languages : en
Pages : 238
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Book Description
Author: Joseph R. Geraci
Publisher: National Aquarium in Baltimore
ISBN: 0977460908
Category : Marine mammals
Languages : en
Pages : 386
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Book Description
Comprehensive manual for understanding and carrying out marine mammal rescue activities for stranded seals, manatees, dolphins, whales, or sea otters.
Author: A. Schytte Blix
Publisher: Elsevier
ISBN: 0080543790
Category : Science
Languages : en
Pages : 735
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Book Description
This volume outlines the major findings from the Norwegian research programme on whales and seals in Norwegian waters. A wide range of topics are covered, including physiological aspects, social organization, population dynamics, stock assessment and management. The book will be of great value to scientists and managers, as well as to members of the general public interested in environmental issues.
Author:
Publisher:
ISBN:
Category : Bycatches (Fisheries)
Languages : en
Pages : 196
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Book Description
Author: William F. Perrin
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 648
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Book Description
Author: Boris M. Culik
Publisher: UN
ISBN: 9783937429922
Category : Agreement on the Conservation of Small Cetaceans of the Baltic and North Seas
Languages : en
Pages : 0
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Book Description
Toothed whales occur in a wide range of marine and freshwater habitats, from the Arctic to the tropics. Some species live in large river systems such as the Amazon, Ganges, Indus and Yangtze. This encyclopedia on all 72 species of toothed whales includes the most recent scientific findings on the distribution, migration, behaviour and threats to this group of whales.
