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Related to TRAWL: trawl net
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Trawls or related fishing gear are now used from subpolar to tropical waters.
The Net Symmetry System consists of two master sonar sensors strategically placed on the trawl doors or on the wing ends of the trawl.
The relationship between trawl shape and its sampling efficiency is directly affected by 3 common pro cesses: 1) horizontal herding, defined as the horizontal movement of fish into or out of the net path, 2) vertical herding, defined as the vertical movement of fish into or out of the net path, and 3) escapement, defined as and limited here to fish passage beneath the footrope.
How fishes respond to demersal trawls is indicative of their catchability and has been studied for the different catch zones of a trawl where individuals may occur either 1) in the path of a trawl (i.
A spokeswoman for Stockton Council said its usual truancy trawls would be held during the three week period.
One of our objectives has been to determine the value and efficiency of trawl surveys for sampling sturgeon and other big river fishes.
In another study, the density of small shrimp was 13 per square meter outside trawl drag paths and zero in a scallop dredge path.
This report is an indispensable reference guide to Hong Kong, putting key facts and figures, political and economic information at your fingertips, without having to trawl through other books and websites.
While trawling Net of cod nets can be in the water anywhere between 10 minutes to several hours, whether or not fish enter the net is generally decided within a few minutes of when they end up at the trawl mouth.
We used generalized additive modeling (GAM) to examine relationships between these predictors and patterns of settled juvenile and adult distribution and abundance from bottom trawl surveys conducted from 1997 through 2010.
ABSTRACT Saucer scallops, Amusium balloti, are targeted by Shark Bay prawn and scallop trawl fisheries where regulatory discarding can occur during summer and winter months that may adversely impact the recruitment of this resource.
Deep-water trawl surveys were conducted during October and November of each survey year (in general over a 6-wk period).