Distribution, biomass and size of grooved Tanner crabs (Chionoecetes tanneri) from annual bottom trawl surveys (2003–2010) along the U.S. west coast (Washington to California)

2012 ◽  
Vol 67 ◽  
pp. 44-54 ◽  
Author(s):  
Aimee A. Keller ◽  
John H. Harms ◽  
John C. Buchanan
Keyword(s):  
West Coast ◽  
Bottom Trawl ◽  
The U.S ◽  
Trawl Surveys

scholarly journals FISHERY RESOURCES IN THE WEST COAST OF ACEH AFTER TSUNAMI: RESULTS OF THE BOTTOM TRAWL SURVEYS

2017 ◽  
Vol 13 (2) ◽  
pp. 55
Author(s):  
Wijopriono Wijopriono ◽  
Wedjatmiko Wedjatmiko ◽  
Suprapto Suprapto
Keyword(s):  
West Coast ◽  
The State ◽  
Bottom Trawl ◽  
The West ◽  
Fishery Resources ◽  
Aceh Province ◽  
Trawl Surveys

Investigation on fishery resources in the west coast of Aceh Province was carried out during July until August 2005 and August until September 2006. One of the objectives of the investigation was to determine the state of demersai stock after the area severely hit by tsunami in December 2004.

Age-structured meta-analysis of U.S. West Coast rockfish (Scorpaenidae) populations and hierarchical modeling of trawl survey catchabilities

2002 ◽  
Vol 59 (2) ◽  
pp. 383-392 ◽  
Author(s):  
Russell B Millar ◽  
Richard D Methot
Keyword(s):  
West Coast ◽  
Hierarchical Modeling ◽  
Meta Analysis ◽  
Trawl Survey ◽  
Main Effect ◽  
Age Structured ◽  
Future Work ◽  
Swept Area ◽  
The U.S ◽  
Trawl Surveys

The swept-area estimates of biomass from the triennial groundfish trawl surveys on the shelf of the U.S. West Coast are believed to seriously underestimate rockfish (Scorpaenidae) stock biomasses. The bulk catchability (Q), defined to be the ratio between swept-area biomass and actual biomass, is herein modeled using a Bayesian age-structured meta-analysis of suitable West Coast rockfish stocks. Six shelf stocks of rockfish were used. The posterior distribution of Q was insensitive to choice of prior and gives a probability of about 0.05 that the bulk catchability of a randomly selected shelf rockfish species will be unity or higher. Between survey variability in bulk catchabilities was modeled as a multiplicative main effect. With individual posterior probabilities in excess of 0.99, bulk catchabilities were lower than normal in 1977 and 1980 and higher than normal in 1989 and 1998. The low catchabilities in 1977 and 1980 are consistent with previously identified problems with lack of bottom contact in the earlier years of the survey. Future work will extend the model to incorporate dynamic modeling of unassessed rockfish stocks, and suggestions for this are given.

Examining the importance of consistency in multi-vessel trawl survey design based on the U.S. west coast groundfish bottom trawl survey

2004 ◽  
Vol 70 (2-3) ◽  
pp. 239-250 ◽  
Author(s):  
Andrew B. Cooper ◽  
Andrew A. Rosenberg ◽  
Gunnar Stefánsson ◽  
Marc Mangel
Keyword(s):  
West Coast ◽  
Survey Design ◽  
Bottom Trawl ◽  
Trawl Survey ◽  
Bottom Trawl Survey ◽  
The U.S

scholarly journals Improving Catch Utilization in the U.S. West Coast Groundfish Bottom Trawl Fishery: an Evaluation of T90-Mesh and Diamond-Mesh Cod Ends

2017 ◽  
Vol 9 (1) ◽  
pp. 149-160 ◽  
Author(s):  
Mark J. M. Lomeli ◽  
Owen S. Hamel ◽  
W. Waldo Wakefield ◽  
Daniel L. Erickson
Keyword(s):  
West Coast ◽  
Bottom Trawl ◽  
Trawl Fishery ◽  
The U.S
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