In Skagerrak and the North Sea, coastal vessels harvest deep-water shrimp (Pandalus borealis) in a mixed fishery, which catches of Nephrops (Nephrops norvegicus) are economic importance for fleet. Fishermen targeting this area must use sorting grid with maximum bar spacing 19 mm, means that only smallest can pass through to be retained main codend. Although fish collection bags may mounted grid...

The shrimp fishery is the most economically important fishery in Mexico. The trawler-based portion of this fishery results in high rates of by-catch. This study quantifies and describes the biodiversity of by-catch associated with trawling in the Bahía de Kino region of Sonora, Mexico. Data were collected from 55 trawls, on six boats, over 14 nights, during November of 2003, 2004, 2006-2009. By...

We analysed relationships between demersal fish species richness, environment and trawl characteristics using an extensive collection of trawl data from the oceans around New Zealand. Analyses were carried out using both generalised additive models and boosted regression trees (sometimes referred to as “stochastic gradient boosting”). Depth was the single most important environmental predictor ...

For prawn trawling systems, drag reduction is a high priority as the trawling process is energy intensive. Large benefits have occurred through the use of multiple-net rigs and thin twine in the netting. An additional positive effect of these successful twine-area reduction strategies is the reduced amount of otter board area required to spread the trawl systems, which leads to further drag red...

The size selectivity and usability of three codends were quantified compared for the first time in inshore Northern shrimp (Pandalus borealis) trawl fishery Iceland using covered codend method: a conventional diamond-mesh (T0), square-mesh (T45), 90° turned mesh (T90) constructed four panels with shortened lastridge ropes. Fishers, wanting to increase average-individual captured shrimp, had req...

—The use of fisheries-independent trawl survey data to estimate fish abundance in shallow coastal systems can present challenges for producing reliable population estimates. We used hydroacoustic and trawl data to estimate the catch efficiency of a demersal trawl that is presently used in surveys to support stock assessments in Chesapeake Bay, USA. Specifically, we determined the efficiency of ...