A proposed acoustic survey design for 4WX herring spawning components / by G.D. Melvin and M.J. Power.: Fs70-1/1999-63E-PDF
Over the past several years the 4WX herring stock complex has been assessed using input from acoustic based surveys and fishing excursions. Unfortunately, the data have been collected in a somewhat ad hoc manner. The results, while providing valuable information on the abundance of herring on specific spawning grounds, are not comparable from year to year due to restricted coverage and only provide a minimum biomass of the fish observed on the day surveyed. The purpose of this report is to describe a survey approach which will incorporate standard acoustic protocol (i.e. randomly selected transects) and pre-defined strata into the industry surveys. In this way the area covered will be consistent from survey to survey, year to year and will allow for inter-annual comparison of the data and its possible use as an index of abundance sometime in the future (5-7 years).
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| Title | A proposed acoustic survey design for 4WX herring spawning components / by G.D. Melvin and M.J. Power. |
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| Publication type | Monograph - View Master Record |
| Language | [English] |
| Format | Digital text |
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| Description | 15 p. : fig., maps, tables. |
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