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Report on meta-analyses of gear selectivity data in terms of gear design parameters, and of the vertical distribution of fish as they enter trawls; sensitivity analysis of predictive methods to estimate selectivity for data poor species, and economic model to evaluate impact of selective gears at vessel level

O' Neill, Barry; Noble, Struan


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@misc{o_neill_barry_2017_1203984,
  author       = {O' Neill, Barry and
                  Noble, Struan},
  title        = {{Report on meta-analyses of gear selectivity data 
                   in terms of gear design parameters, and of the
                   vertical distribution of fish as they enter
                   trawls; sensitivity analysis of predictive methods
                   to estimate selectivity for data poor species, and
                   economic model to evaluate impact of selective
                   gears at vessel level}},
  month        = jun,
  year         = 2017,
  note         = {{Report Highlights:  •       codend selection 
                   depends on codend mesh size, the number of open
                   meshes around the circumference and twine
                   diameter; •       panel selection depends on panel
                   mesh size; •       For gadoids, panel contact
                   probability depends on where the panel is
                   positioned and the time of year when fishing takes
                   place; •       the relationship of L50 with number
                   of meshes in circumference and twine thickness can
                   be opposite between roundfish and flatfish; •
                   it should be possible to separate the three
                   categories of (i) haddock, whiting and saithe,
                   (ii) cod, plaice and lemon sole and (iii) monkfish
                   and Nephrops using vertical separation; •       A
                   Best Practice Guideline and an Excel toolkit
                   assessing the economic implications of selective
                   gears are being developed.}},
  doi          = {10.5281/zenodo.1203984},
  url          = {https://doi.org/10.5281/zenodo.1203984}
}
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