Turbulent flow interacting with flexible trawl net structure including simulation catch in flume tank [PDF]
The interaction between fluid and the midwater trawl with stocked catches is extremely complex, but essential to improve the understanding of the drag force acting on the trawl, the behavior of the fishing structure during a trawling process, and to ...
Bruno Thierry Nyatchouba Nsangue +4 more
doaj +2 more sources
Methоd of rigging parameters calculation for midwater trawls
The rigging parameters calculation for midwater trawls are discussed with description of numerical model for calculating the parameters of trawl boards, hydrodynamic kites, and dispersed and concentrated weights which provide the designed values of horizontal and vertical opening of the trawl mouth.
V. I. Gabruk +3 more
openaire +4 more sources
Time‐varying flow–ecology relationships for an endangered fish population: Longfin Smelt in the San Francisco Estuary [PDF]
Abstract Major estuaries globally are experiencing fast‐paced changes in hydrology and ecosystem dynamics. However, connecting alteration of river flow regimes to estuarine fish population dynamics remains a challenge, partly due to the untested assumption that flow regimes, fish dynamics, and the resulting flow–ecology relationships are stationary (i ...
Parsa Saffarinia +3 more
wiley +2 more sources
Are Sponges Good Natural Sentinels for Monitoring Fish Diversity in Antarctic Coastal Waters? [PDF]
This study demonstrates that eDNA metabarcoding using both water and sponge samples is an effective tool for monitoring fish biodiversity along the Western Antarctic Peninsula. The results revealed 14 endemic Antarctic fish species and one marine mammal, with water samples often offering a more comprehensive view than sponges.
Carlos Angulo‐Preckler +5 more
wiley +2 more sources
Linking oceanic variability, euphausiid hotspot persistence, and marine predator distribution along Canada's west coast [PDF]
Abstract Understanding patterns of habitat use across trophic levels and the physical drivers of multispecies aggregations is essential to inform ecosystem‐based management. To achieve this, we quantified the spatial distribution and co‐occurrence of hotspots (defined using the Getis‐Ord statistic) for euphausiids and nine of their commercially ...
Rhian Evans +6 more
wiley +2 more sources
One-boat midwater trawling with unequal panelled trawl [PDF]
Results of the comparative efficiency studies with 10.5 m equal panelled and 10.3 m unequal panelled midwater trawls operated from 10.9 m wooden trawler are presented.
George, T.P. +3 more
core +3 more sources
Intraspecific variation in prey quality affects the consumption rates of top predators [PDF]
This study reveals overlooked intraspecific variation in prey quality and its influence on predator energy budgets. By identifying key ecological drivers, we emphasize the need to integrate such variability into bioenergetic models to improve predictions of predator foraging and ecosystem responses to environmental change.
Stephanie E. Nehasil +3 more
wiley +2 more sources
Studies on bridle lengths in one-boat midwater trawling [PDF]
Investigation on the comparative fishing trials to study the effect of bridles for a 10.5 m four equal panelled one-boat midwater trawl are described. Three bridle lengths of 20, 30 and 40 m were tested for relative efficiency evaluation. 30m bridles are
Mathai, P.G. +2 more
core +3 more sources
Antarctic krill (Euphausia superba) is harvested using different design midwater trawls. Knowing the selective properties between trawls is crucial information for the management of the krill resources.
Zhongqiu Wang +13 more
doaj +1 more source
VERDA: A Multisampler Tool for Mesopelagic Nets
Different types and systems to discriminate plankton samples at different strata in the water column have been developed in recent decades. For sampling at sufficient depth, opening and closing zooplankton multinets are ideal because there is no ...
Arturo Castellón, María Pilar Olivar
doaj +1 more source

