Newly settled juveniles and older fishes were sampled with a 2-m beam trawl
in Great Bay estuary, near Beach Haven Ridge, as well as in other habitats (Fig.
Two general groups were identified in the beam trawl
(inshore and near-ridge+offshore) and three in the otter trawl (inshore, near-ridge, and offshore).
Benthic organisms, including the four target flatfish species, were collected during daylight with a beam trawl
(Gunderson and Ellis, 1986).
Juvenile fish were collected at each station by using a 2-m beam trawl
with a 6-mm mesh body and a 3-mm mesh tail bag.
Calculating CPUE per length (m) of roller beam trawl
controlled for variation in gear size.
Similar beam trawl
and dredging surveys have been carried out in other estuaries and harbours in the Northern Territory, but this species has not been not found.
Mortality of brown-shrimp discards from the beam trawl
fishery in the Tagus estuary, Portugal.
Monthly sampling was conducted with a 1-meter beam trawl
The introduction of the beam trawl
net in the 1890s as a way to save money and replace the baited long-line leads to the lean times of the 1930s.
The beam trawl
, held open by a steel beam instead of otter boards and typically fitted with chains, has an empty weight of up to 13 tons.
The charter is required initially for the completion of a nephrops survey using towed uwtv and 3 m beam trawl
and this may be followed by a variety of oceanographic surveys and further nephrops surveys.
Studies in which bottom grabs were used to sample organisms in unconsolidated sediments have revealed a measurable impact from trawling on an infaunal community in the North Sea from a single pass of a beam trawl
, even in an environment that had been trawled heavily for decades (Reiss et ah, 2009), but in a study in South Africa, no measurable impacts of additional trawling to the epifaunal community in a continuously trawled area (Atkinson et ah, 2011).