Standardizing the Southern Gulf of St. Lawrence Bottom-trawl Survey Time Series : Adjusting for Changes in Research Vessel, Gear and Survey Protocol PDF Download

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Standardizing the Southern Gulf of St. Lawrence Bottom-trawl Survey Time Series : Adjusting for Changes in Research Vessel, Gear and Survey Protocol

Standardizing the Southern Gulf of St. Lawrence Bottom-trawl Survey Time Series : Adjusting for Changes in Research Vessel, Gear and Survey Protocol PDF Author: Canada. Department of Fisheries and Oceans
Publisher: Moncton, N.B. : Fisheries and Oceans
ISBN:
Category :
Languages : en
Pages : 95

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Standardizing the Southern Gulf of St. Lawrence Bottom-trawl Survey Time Series : Adjusting for Changes in Research Vessel, Gear and Survey Protocol

Standardizing the Southern Gulf of St. Lawrence Bottom-trawl Survey Time Series : Adjusting for Changes in Research Vessel, Gear and Survey Protocol PDF Author: Canada. Department of Fisheries and Oceans
Publisher: Moncton, N.B. : Fisheries and Oceans
ISBN:
Category :
Languages : en
Pages : 95

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Book Description

Standardizing the Southern Gulf of St. Lawrence Bottom Trawl Survey Time Series

Standardizing the Southern Gulf of St. Lawrence Bottom Trawl Survey Time Series PDF Author: Hugues Pascal Benoît
Publisher:
ISBN:
Category : Fish stock assessment
Languages : en
Pages : 127

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Preliminary Results from the September 2009 Bottom-trawl Survey of the Southern Gulf of St. Lawrence

Preliminary Results from the September 2009 Bottom-trawl Survey of the Southern Gulf of St. Lawrence PDF Author:
Publisher:
ISBN:
Category : Fish stock assessment
Languages : en
Pages :

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Results from the 2011 Sentinel Bottom-trawl Survey in the Southern Gulf of St. Lawrence and Comparisons with Previous 2003 to 2010 Surveys

Results from the 2011 Sentinel Bottom-trawl Survey in the Southern Gulf of St. Lawrence and Comparisons with Previous 2003 to 2010 Surveys PDF Author: Luc Savoie
Publisher:
ISBN:
Category : Trawls and trawling
Languages : en
Pages :

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Preliminary Results from the September 2012 and 2013 Bottom-trawl Surveys of the Southern Gulf of St. Lawrence and Comparisons with Previous 1971 to 2011 Surveys

Preliminary Results from the September 2012 and 2013 Bottom-trawl Surveys of the Southern Gulf of St. Lawrence and Comparisons with Previous 1971 to 2011 Surveys PDF Author: Luc Savoie
Publisher:
ISBN:
Category : Dredging (Fisheries)
Languages : en
Pages : 127

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Results from the 2012 and 2013 Sentinel Bottom-trawl Surveys in the Southern Gulf of St. Lawrence and Comparisons with Previous 2003 to 2011 Surveys

Results from the 2012 and 2013 Sentinel Bottom-trawl Surveys in the Southern Gulf of St. Lawrence and Comparisons with Previous 2003 to 2011 Surveys PDF Author: Luc Savoie
Publisher:
ISBN:
Category : Dredging (Fisheries)
Languages : en
Pages : 63

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Book Description

Calibration of Bottom Trawl Survey Vessels

Calibration of Bottom Trawl Survey Vessels PDF Author: G. Mark Fowler
Publisher:
ISBN:
Category : Calibration
Languages : en
Pages : 34

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Book Description
Adjustments to calibrate fish and invertebrate abundance estimates between two research survey vessels were determined using mixed-effects and fixed-effects modelling. The fixed-effects model assumes equal probability of a fish being available for capture between the two vessels for a given paired tow set, while the mixed-effects model assumes equal probability over the population of sets, including an estimate of within-set variability as random error. The mixed-effects approach appeared superior to the fixed-effects approach, being better able to resolve the high variability between sets characteristic of the stratified-random survey design in which the calibrartion experiment was conducted. Differences in catchability with length of animals was pervasive, the greatest differences in catchability between vessels being associated with the smallest animals. The influence of length on catchability was best portrayed as a curilinear relationship, as catchability tended to plateau for animals over about 26cm. For some species catchabilities between vessles differed according to the time of day and depth of a tow, though in most cases the differences were of fairly small magnitude.

Preliminary Results from the September 2010 and 2011 Bottom-trawl Survey of the Southern Gulf of St. Lawrence

Preliminary Results from the September 2010 and 2011 Bottom-trawl Survey of the Southern Gulf of St. Lawrence PDF Author:
Publisher:
ISBN:
Category : Dredging (Fisheries)
Languages : en
Pages :

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Book Description

Preliminary results from the September 2010 and 2011 bottom-trawl survey of the southern Gulf of St. Lawrence

Preliminary results from the September 2010 and 2011 bottom-trawl survey of the southern Gulf of St. Lawrence PDF Author:
Publisher:
ISBN:
Category : Dredging (Fisheries)
Languages : en
Pages :

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Book Description

Results from the 2010 Sentinel Bottom-trawl Survey in the Southern Gulf of St. Lawrence and Comparisons with Previous 2003 to 2009 Surveys

Results from the 2010 Sentinel Bottom-trawl Survey in the Southern Gulf of St. Lawrence and Comparisons with Previous 2003 to 2009 Surveys PDF Author: Luc Savoie
Publisher:
ISBN:
Category : Fish stock assessment
Languages : en
Pages : 50

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Book Description