Fishing Smarter: - Fisheries and Marine Institute

More documents

Recommendations

Info

$Sample Math Placement Test$

$Y:\How to solve 2 dimension relative velocity problems.wpd$

NOT FOR REPRODUCTIONFISHERIES AND OCEANS CANADAFigure 7: Attachment of an acoustic transmitter to an adult American plaice.i) First, we must strive for improved integration andprocessing of observational data from multiple technologysources. Though much has been learned since theearliest studies in the 1960s, there are still many gaps inthe current understanding of how animals encounter, getcaught, and escape from fishing gear. Each technology,whether optical or acoustical, has its own inherentbenefits and limitations, and a combination of multipleinstruments is often necessary to understand the captureprocess from start to finish. Integrating these data withan emphasis on the quantification of animal behaviour,not just descriptions of behaviour, is required.ii) Armed with this information, we must seek tounderstand why animals do what they do. Futureresearch must attempt to tackle the functionalexplanations behind behavioural expression. We need toexplore the costs and benefits associated with thedecisions that animals make and how to predict theprobable (optimal) decision under different conditions.For example, what are the behavioural trade-offs that fishmake in response to an attractive odour plume whensimultaneously engaged in spawning, or by contrast,what is the optimal avoidance distance to an approachingtrawler when actively engaged in feeding?In summary, several technologies now exist for theobservation of animal behaviour in relation to fishing gear.Depending on the application, researchers may use oneor more optical or acoustic technologies in order tounderstand the behavioural ecology of animals, theircapture process, and how it varies with species, size, andenvironmental conditions. This leads to informed decisionsabout fishing gear design and engineering, improving thespecies- and size-selectivity of the gear, reducingunwanted bycatch, and unnecessary discarding. Dr. Paul Winger is the Director of theCentre for Sustainable AquaticResources, an applied research unitwithin the Fisheries and MarineInstitute of Memorial University. Heholds a B.Sc. in Marine Biology andOceanography from DalhousieUniversity, as well as an M.Sc. and Ph.D. from MemorialUniversity in the field of fish capture behaviour. You canreach him at Paul.Winger@mi.mun.ca, 1-709-778-0521,www.mi.mun.ca/csar.20 THE JOURNAL OF OCEAN TECHNOLOGY • EssaysCopyright Journal of Ocean Technology 2008
NOT FOR REPRODUCTIONCopyright Journal of Ocean Technology 2008All the Fishes that Swim, Vol. 3, No. 2, 2008 21
Page 1 and 2: NOT FOR REPRODUCTIONhose of you who
Page 3 and 4: NOT FOR REPRODUCTIONFISHERIES AND O
Page 5: NOT FOR REPRODUCTIONfish for more t

Fishing Smarter: - Fisheries and Marine Institute

Create successful ePaper yourself

Delete template?

Save as template?