Results 11 to 20 of about 4,677 (222)

Time-varying flow-ecology relationships for an endangered fish population: Longfin Smelt in the San Francisco Estuary. [PDF]

Ecol Appl
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 ...
Saffarinia P, Hobbs JA, Carlson SM, Ruhí A.   +3 more
europepmc   +2 more sources

Linking oceanic variability, euphausiid hotspot persistence, and marine predator distribution along Canada's west coast. [PDF]

Ecol Appl
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 ...
Evans R, Gauthier S, Robinson CLK, English PA, Stanley C, Wright BM, Nichol L.   +6 more
europepmc   +2 more sources

A method to determine patterns for changing parameters of the rope-net shell of midwater trawl along its length

Известия ТИНРО, 2023
A technique for designing the rope-net shell of midwater trawl is described on example of the trawl Sirius Shelf project AS 11.012.000 designed by Aquaservice Ltd. Diagrams of the rope-net shell parameters distribution along trawl are used. The technique
L. M. Simkin
doaj   +1 more source

Effect of Cutting Ratio and Catch on Drag Characteristics and Fluttering Motions of Midwater Trawl Codend

Journal of Marine Science and Engineering, 2021
The codend of a trawl net is the rearmost and crucial part of the net for selective fish catch and juvenile escape. To ensure efficient and sustainable midwater trawl fisheries, it is essential to better understand the drag characteristics and fluttering
Wei Liu, Hao Tang, Xinxing You, Shuchuang Dong, Liuxiong Xu, Fuxiang Hu   +5 more
doaj   +1 more source

Catch Pattern for Antarctic krill (Euphausia superba) of Different Commercial Trawls in Similar Times and Overlapping Fishing Grounds

Frontiers in Marine Science, 2021
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, Hao Tang, Hao Tang, Hao Tang, Hao Tang, Hao Tang, Bent Herrmann, Bent Herrmann, Bent Herrmann, Liuxiong Xu, Liuxiong Xu, Liuxiong Xu, Liuxiong Xu, Liuxiong Xu   +13 more
doaj   +1 more source

Unlocking the Depths: Use of a Trait-Based Approach to Reveal the Diversity of Foraging Strategies in a Deep-Pelagic Fish Community. [PDF]

Ecol Evol
The deep‐pelagic fish community showed differences in functional strategies along the depth gradient. Epipelagic species exhibited significant trait convergence with traits adapted to the prey‐tracking strategy, while bathypelagic species exhibited significantly higher functional richness values than expected at random.
Loutrage L, Brind'Amour A, Simon-Bouhet B, Dubourg R, Chantre C, Spitz J.   +5 more
europepmc   +2 more sources

Modern specialized fishery of sea fish in the western Bering Sea

Известия ТИНРО, 2021
The shelf and continental slope of the western Bering Sea, being among the most productive areas of the Far-Eastern Seas of Russia, became exploited by commercial fishery half a century ago, after introduction of 200-mile exclusive economic zones in 1977
A. O. Zolotov
doaj   +1 more source

DETERMINING OF OPERATIONAL PARAMETERS FOR TRAWL SYSTEM TAKING INTO ACCOUNT EXPERIMENTAL DATA ON SHAPE OF THE ROPE-NET SHELL OF MIDWATER TRAWLS

Известия ТИНРО, 2020
Calculating of horizontal opening for a trawl mouth using the mathematical model of midwater trawl system developed by V.I. Gabryuk gives the errors 25.4 and 32.9 %, on average, for the trawls RT 57/360 m and RT 80/396 m, respectively.
O. N. Kruchinin, E. A. Zakharov, D. L. Shabelsky   +2 more
doaj   +1 more source

Phenology-informed decline risk of estuarine fishes and their prey suggests potential for future trophic mismatches. [PDF]

Ecol Appl
Abstract Conservation scientists have long used population viability analysis (PVA) on species count data to quantify critical decline risk, thereby informing conservation actions. These assessments typically focus on a single species rather than assemblages and assume that risk is consistent within a given life stage (e.g., across the different ...
Fournier RJ, Marino TC, Carlson SM, Ruhí A.   +3 more
europepmc   +2 more sources

Engineering calculation of a midwater fishing trawl

Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mekhanika, 2023
This paper presents a method for calculating the power and geometric properties of a midwater fishing trawl, which is a complicated engineering structure made up of tied flexible (threads, ropes, flap) and rigid (rigging, trawl boards) elements. A computational model, the functional relations for internal forces and geometric characteristics of the ...
Aleksey O. Razhev, Aleksandr A. Nedostup
openaire   +1 more source