Pre-season Run Size Forecasts for Fraser River Sockeye Salmon in 2010 PDF Download
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Author:
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ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages : 12
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Book Description
Author:
Publisher:
ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages : 12
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Book Description
Author:
Publisher:
ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages :
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Author: Sue Grant
Publisher:
ISBN:
Category : Salmon fisheries
Languages : en
Pages : 13
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Author: A. J. Cass
Publisher:
ISBN:
Category : Fish stock assessment
Languages : en
Pages : 0
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Author: Sue Grant
Publisher:
ISBN:
Category : Pink salmon
Languages : en
Pages : 18
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Book Description
Author: Sue Grant
Publisher:
ISBN:
Category : Salmon fisheries
Languages : en
Pages : 10
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Author: Sue Grant
Publisher:
ISBN:
Category : Pink salmon
Languages : en
Pages : 15
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Author:
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Category :
Languages : en
Pages : 0
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Chilko marine survival, similar to the total Fraser Sockeye survival trend, declined in the 1990's and culminated in the lowest survival on record in the 2009 return year. [...] Analysis and Response Data Fraser Sockeye stock-recruitment data used in the forecast process includes the following: • The last brood year for which full recruitment data (four and five year olds) are available for the 2016 forecast is 2009, with the exception of Harrison Sockeye (three and four year olds) where data are included to the 2010 brood year. [...] Five year old forecasts derived from the sibling model were used for the following stocks and the rationales for using the sibling model are described below: 6 Pacific Region Pre-Season Run Size for Fraser River Sockeye Salmon 2016 • Weaver: a high proportion of five year olds in the original selected model forecast (93%) due to the very low brood year escapement in 2012 (400 EFS), exceptionally l [...] However, if the Larkin model had been used for these stocks in 2015, instead of the Ricker model, then the returns (which were comprised of ~75% four year olds) would have fallen closer to the mid-point of the forecast distribution. [...] Given the exceptional brood year escapement in 2010, the improved performance (return minus forecast) of the Larkin model to predict four year old recruits from the 2011 brood year that returned in 2015, indicates the possibility that these stocks experienced delayed-density dependent survival in the 2011 brood year.
Author: A. J. Cass
Publisher:
ISBN:
Category : Pink salmon
Languages : en
Pages : 12
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Book Description
Author: A. J. Cass
Publisher:
ISBN:
Category : Fish stock assessment
Languages : en
Pages : 0
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Book Description
