نتایج جستجو برای: landings

تعداد نتایج: 1223  

Journal: :Science 2004
Felicia C Coleman Will F Figueira Jeffrey S Ueland Larry B Crowder

We evaluated the commercial and recreational fishery landings over the past 22 years, first at the national level, then for populations of concern (those that are overfished or experiencing overfishing), and finally by region. Recreational landings in 2002 account for 4% of total marine fish landed in the United States. With large industrial fisheries excluded (e.g., menhaden and pollock), the ...

2015
Thomas A. Oliver Kirsten L. L. Oleson Hajanaina Ratsimbazafy Daniel Raberinary Sophie Benbow Alasdair Harris Dennis M. Higgs

OVERVIEW Eight years of octopus fishery records from southwest Madagascar reveal significant positive impacts from 36 periodic closures on: (a) fishery catches and (b) village fishery income, such that (c) economic benefits from increased landings outweigh costs of foregone catch. Closures covered ~20% of a village's fished area and lasted 2-7 months. FISHERY CATCHES FROM EACH CLOSED SITE Oct...

2005
Dirk Zeller Daniel Pauly

During fishing operations, fish are often caught that were not targeted. When the species in question are of low value, or protected, this ‘by-catch’ is often thrown overboard as ‘discards’, the retained part of the catch constituting the landings. The amounts of fish discarded are generally highly areaand gear-specific, but can be high; for example, discards in tropical shrimp trawl fisheries ...

Journal: :Journal of rehabilitation medicine 2009
Philip S Requejo Somboon Maneekobkunwong Jill McNitt-Gray Rodney Adkins Robert Waters

OBJECTIVE Shocks and vibrations experienced while using a hand-rim wheelchair can contribute to discomfort, fatigue and injury. The aim of this study was to compare the seat forces and head accelerations experienced by manual wheelchair users during independent curb descent landings in a standard and 3 suspension-type rigid-frame wheelchairs. DESIGN EXPERIMENTAL repeated measures analysis ...

2011
Evangelos Pappas Felipe P. Carpes

Higher side-to-side asymmetry among female athletes compared to their male counterparts during bilateral athletic tasks such as landing from a jump has been proposed as a potential source of non-contact knee injuries. However, the kinematic symmetry and potential sex differences during bilateral landings have not been examined. The purpose of this study was to evaluate lower extremity kinematic...

Journal: :Aviation, space, and environmental medicine 2011
Steven T Moore Valentina Dilda Hamish G MacDougall

BACKGROUND Exposure to microgravity adversely affects performance of astronaut pilots; a review of the first 100 Shuttle missions found that touchdown speed was above specified limits in 20% of landings, in contrast to near ideal performance in preflight high-fidelity Shuttle simulations. Ground-based simulators emphasize spacecraft handling abilities, but do not recreate the effects of extende...

Journal: :Biology letters 2013
Mafalda Viana Luke McNally Norman Graham David G Reid Andrew L Jackson

Understanding the pressures of fisheries on the ecosystem is crucial for effective management. Fishery removals, or catch, are composed of both landings and discards. However, the use of discards data in studies investigating the effect of the fishing pressures is sparse. Here, we explore the individual contribution of both these catch components to the overall pressure of fisheries on the ecos...

Journal: :Journal of applied biomechanics 2012
Evangelos Pappas Karl F Orishimo Ian Kremenic Marijeanne Liederbach Marshall Hagins

Retrospective studies have suggested that dancers performing on inclined ("raked") stages have increased injury risk. One study suggests that biomechanical differences exist between flat and inclined surfaces during bilateral landings; however, no studies have examined whether such differences exist during unilateral landings. In addition, little is known regarding potential gender differences ...

2017
Marques Carvalho and Batista

The crustacean exoskeleton presents several functions including the stabilization of the whole body of the animal, resistance to mechanical loads, and protection to the environment and against predators [1]. The structure of crustacean exoskeleton consists of an organic matrix constituted by α-chitin, proteins and carotenoid pigments and an inorganic fraction where calcium carbonate is the main...

2017
Katherine E. Mills Andrew J. Pershing Christina M. Hernández

The fishery for American lobster is currently the highest-valued commercial fishery in the United States, worth over US$620 million in dockside value in 2015. During a marine heat wave in 2012, the fishery was disrupted by the early warming of spring ocean temperatures and subsequent influx of lobster landings. This situation resulted in a price collapse, as the supply chain was not prepared fo...

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