نتایج جستجو برای: fishing gears
تعداد نتایج: 16714 فیلتر نتایج به سال:
During the previous micronekton inter-calibration experiments, the following gears were tested: IKMT, FMT (= HUFT), Cobb trawl, MOCNESS-1 and MOCNESS-10, MOHT and a midwater otter trawl (OT) with Multi-sampler), and the superiority of MOHT over the other gears was shown. However, no direct comparison has been made between the MOHT and the IKMT. The latter gear has been used widely in previous (...
The selectivity of two types commercial fishing gear (crab hoop/traditional and rigid rectangular cage traps) targeting blue crabs (Callinectes arcuatus) in Cuyutlan Lagoon, Mexico, was assessed. effect soak time on crab catches versus the retention escape rate organisms also evaluated. Results suggested that traps captured larger individuals than hoops. carapace width significantly different b...
Abstract Purpose Common octopus is the fishing species with highest economic revenue in Portugal, and its consumption per capita very high. The majority of catches come from small-scale fleet pots traps. aims were to assess main environmental impacts common octopus’ fishery traps Algarve region, where most important size landings volume occurs, find if there are significant differences between ...
Abstract: Aim The present study investigated the social impacts caused by construction of a large hydropower dam (Lajeado Dam) on artisanal fishers in Middle Tocantins River, evaluating how impoundment affected fishing techniques (locations, transport and gears), operation (income, effort costs), fisher’s well-being. Methods interviewed 30 (Colony Z-04, Porto Nacional, TO) between August Octobe...
in this paper, a fault diagnosis system based on discrete wavelet transform (dwt) and artificial neural networks (anns) is designed to diagnose different types of fault in gears. dwt is an advanced signal-processing technique for fault detection and identification. five features of wavelet transform rms, crest factor, kurtosis, standard deviation and skewness of discrete wavelet coefficients of...
To date, elliptical gear has been commonly used in automobile, automatic machinery, pumps, flow meters and printing presses for its particular non-uniform rotation. However, the dynamic characteristics of elliptical gears have not been clarified yet. In this study, The calculation as well as the experiment of two elliptical gears, which are a single elliptical gear and a double elliptical gear,...
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