Sustainable Practices – Fisheries

Sustainability Practices - Fisheries Sustainability Practices - Fisheries

BIM works closely with the fishing sector to develop applied technical solutions which meet environmental challenges and improve fisheries sustainability.

Working in collaboration with Galway Mayo Institute of Technology, we also publish key studies and new analytical methods in peer reviewed journals which contributes towards the science which underpins sustainable fisheries.

 

Catch Comparison for multi gear trials in the Irish Nephrops Fishery

Published in the ICES Journal of Marine Science, we developed a statistical methodology for comparing catches from more than two gears such as quad-rig trawling which is the main gear type used in the Irish Nephrops fishery: Factors which affect gear trial outcomes such as catch weight, net position, day/night hauls can now be included catch comparison analyses.

Read the report here

 

Reducing unwanted fish catches in the Nephrops Fisheries with a dual codend

We published a paper in the journal Fisheries Research which demonstrates the benefits of a novel double codend trawl with inclined separator panels in mixed Nephrops fisheries. The gear substantially reduced catches of small haddock and whiting while generally maintaining market sized Nephrops and fish catches. Highly effective species separation facilitates alternative selectivity measures depending on landing obligation requirements. Additional benefits include reduced catch sorting times were outlined and the gear has been implemented as a gear option in the Celtic Sea.

Read the report here

Forthcoming report: Match of the day: optimised experimental design in alternate-haul gear Forthcoming report: Match of the day: optimised experimental design in alternate-haul gear

Titled “Match of the day: optimised experimental design in alternate-haul gear”, this paper was recently submitted to the ICES Journal of Marine Science. This work investigates the effects of different matching methodologies in alternate-haul gear trials. Non-simultaneous or alternate-haul deployments are generally required in catch comparison experiments for single-rig trawls or seine nets. In those gears, matching consecutive test and control hauls helps minimise such variability. Random-haul matching strategies have also been employed where consecutive deployments are not logistically possible. We examine how haul matching methodology influences catch curve estimates and uncertainty and provide practical guidance for experimental design during planning and at-sea operations to optimise trial outputs.


For More Information

Fisheries Conservation Manager

Dr. Ronán Cosgrove