Herring Spawning Surveys in Southeastern Alaska PDF Download
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Author: Bernard Einar Skud
Publisher:
ISBN:
Category : Atlantic herring
Languages : en
Pages : 24
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Book Description
Aerial surveys to observe milt clouds produced by spawning herring in Southeastern Alaska waters hold promise as a method for assessing the extent of spawn deposition. Flights are conducted at altitudes of 500 to 700 feet and at cruising speeds of 120 knots. The mileage of beach utilized for spawning is recorded on reduced prints of navigation charts. The surveys have resulted in the discovery of 80 previously unreported spawning beaches. Observations during these preliminary flights have also added valuable information on the time of spawning and the physical characteristics of the beaches.
Author: Bernard Einar Skud
Publisher:
ISBN:
Category : Atlantic herring
Languages : en
Pages : 24
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Book Description
Aerial surveys to observe milt clouds produced by spawning herring in Southeastern Alaska waters hold promise as a method for assessing the extent of spawn deposition. Flights are conducted at altitudes of 500 to 700 feet and at cruising speeds of 120 knots. The mileage of beach utilized for spawning is recorded on reduced prints of navigation charts. The surveys have resulted in the discovery of 80 previously unreported spawning beaches. Observations during these preliminary flights have also added valuable information on the time of spawning and the physical characteristics of the beaches.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 132
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Book Description
Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 792
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Book Description
Author: R. J. Callaway
Publisher:
ISBN:
Category : Meteorology
Languages : en
Pages : 698
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Book Description
Observations obtained aboard the United States Fish and Wildlife Service research vessels Hugh M. Smith and John R. Manning during Operation NEPAS in 1957 and en route to and from Hawaii
Author: United States. Bureau of Commercial Fisheries
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 34
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Book Description
Author: Thomas F. Thornton
Publisher: University of Washington Press
ISBN: 0295748303
Category : Social Science
Languages : en
Pages : 277
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Book Description
Herring are vital to the productivity and health of marine systems, and socio-ecologically Pacific herring (Clupea pallasii) is one of the most important fish species in the Northern Hemisphere. Human dependence on herring has evolved for millennia through interactions with key spawning areas—but humans have also significantly impacted the species’ distribution and abundance. Combining ethnological, historical, archaeological, and political perspectives with comparative reference to other North Pacific cultures, Herring and People of the North Pacific traces fishery development in Southeast Alaska from precontact Indigenous relationships with herring to postcontact focus on herring products. Revealing new findings about current herring stocks as well as the fish’s significance to the conservation of intraspecies biodiversity, the book explores the role of traditional local knowledge, in combination with archeological, historical, and biological data, in both understanding marine ecology and restoring herring to their former abundance.
Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 1402
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 294
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Book Description
Author: United States. Bureau of Commercial Fisheries
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 792
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Book Description
Author: Commercial Fisheries Bureau
Publisher:
ISBN:
Category :
Languages : en
Pages : 636
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Book Description
