Results 121 to 130 of about 69,927 (313)

Hydrodynamic interactions in midwater trawl nets: combined effects of flow velocity and door spreading through numerical and experimental approaches

open access: yesBrodogradnja
Owing to escalating fuel costs and dwindling fish stocks, optimising midwater trawl efficiency requires a thorough investigation of net design variables.
Zhao Cheng   +5 more
doaj   +1 more source

Mathematical substantiation of parameters of safe pelagic trawling in the canyon [PDF]

open access: yesVestnik MGTU, 2015
The authors have offered and proved the following security options of pelagic trawling in the sea canyon: the tolerance of the vessel from the optimal track; the minimum width of the canyon giving opportunity for the conditions to ensure the safety of ...
Danilov Yu. A., Ermakov S. V.
doaj  

A BIOECONOMIC ANALYSIS OF THE SWEDISH FISHERY FOR NORWAY LOBSTER (NEPHROPS NORVEGICUS) [PDF]

open access: yes
A modified version of Jones' length-based cohort analysis is linked to economic data from the Swedish trawl fishery for Norway lobster (Nephrops norvegicus). The current regulation implies a fishing practice where each landed lobster entails three killed
Eggert, Hakan, Ulmestrand, Mats
core   +1 more source

Positioning teachers in climate change education: Insights from a Hong Kong Global South perspective

open access: yesBritish Educational Research Journal, EarlyView.
Abstract This study examines how prospective teachers in Hong Kong (N = 13) position themselves within climate change education through ‘Global Dialogue for Climate Change Education’, a cross‐institutional teacher education programme facilitating online global dialogues between Hong Kong and the UK.
Sally Wai‐Yan Wan   +5 more
wiley   +1 more source

One-boat midwater trawling with unequal panelled trawl

open access: yes, 1983
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. Out of the two nets, the latter proved to be relatively good for the capture of off bottom and column fishes like pomfrets, seer, lactarius, catfish, silver bar, ribbon fish and an ...
Mhalathkar, H.N.   +3 more
openaire   +2 more sources

An ecological analysis of rockfish (Sebastes spp.) assemblages in the North Pacific Ocean along broad-scale environmental gradients [PDF]

open access: yes, 2008
Environmental variability affects the distributions of most marine fish species. In this analysis, assemblages of rockfish (Sebastes spp.) species were defined on the basis of similarities in their distributions along environmental gradients.
Rooper, Christopher N.
core  

A review of the historic and present ecological role of aquatic and shoreline wood, from forest to deep sea

open access: yesBiological Reviews, EarlyView.
ABSTRACT The ecology of forests, their losses, and terrestrial wood decomposition dynamics have been intensively studied and reviewed. In the aquatic realm, reviews have concentrated on large wood (LW) in rivers and the transition from freshwater to marine environments in the Pacific Northwest of North America. However, a comprehensive global synthesis
Jon Dickson   +9 more
wiley   +1 more source

Performance of pulse trawling compared to conventional beam trawling

open access: yes, 2006
A series of nine fishing trips with on board observers were carried out on MFV UK153 (PT1) and two beam trawlers (BT1, BT2) of comparative engine power and size to appraise the performance of pulse beam v.s. conventional tickler chain beam trawls. The main conclusions from this study are: 1.
van Marlen, B.   +4 more
openaire   +1 more source

Landings and discards on the pulse trawl MFV "Vertrouwen"TX68 in 2009 [PDF]

open access: yes
The catches in terms of landings and discards were monitored onboard MFV “Vertrouwen” TX68, fishing with two pulse trawls using the Verburg-Holland system during four weeks in June-August 2009. The average fishing speed was about 5 knots.
Marlen, B., van, Steenbergen, J.
core   +1 more source

The spread of non‐native species

open access: yesBiological Reviews, EarlyView.
ABSTRACT The global redistribution of species through human agency is one of the defining ecological signatures of the Anthropocene, with biological invasions reshaping biodiversity patterns, ecosystem processes and services, and species interactions globally.
Phillip J. Haubrock   +16 more
wiley   +1 more source

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