نتایج جستجو برای: fishery

تعداد نتایج: 7961  

2002
Kyle W. Shertzer Michael H. Prager Erik H. Williams

The Magnuson–Stevens Fishery Conservation and Management Reauthorization Act of 2006 (MSRA) requires that each Fishery Management Plan in the United States “establish a mechanism for specifying annual catch limits . . . at a level such that overfishing does not occur in the fishery . . .” (MSRA, 2006). This requirement, which ref lects an increased emphasis on conservation, is new in the sense ...

2016
Modesta Medard Han Van Dijk Paul Hebinck Kim Geheb

Beach seine gear is one of the prominent fishing gears in Nile Perch fishery. Before Nile Perch was introduced to the lake, beach seines the species targeted with beach seine were Tilapia, Bagrus, Haplochromis, Protopterus and Labeo. In 1994, beach seines were banned in Tanzania and by 2004, this particular regulation and others, were harmonized and applied to the entire Lake as a result of imp...

2010
Ling Huang Martin D. Smith

1 The emergence of ecosystem-based management suggests that traditional fisheries man2 agement and protection of environmental quality are increasingly interrelated. Fishery 3 managers, however, have limited control over most sources of marine and estuarine pol4 lution and at best can only adapt to environmental conditions. We develop a bioeconomic 5 model of optimal harvest of an annual specie...

2011
Darren W Johnson Mark R Christie Jessica Moye Mark A Hixon

Correlated genetic responses have been hypothesized as important components of fishery-induced evolution, although predictive data from wild populations have been difficult to obtain. Here, we demonstrate substantial genetic correlations between a trait often subjected to fishery selection (adult body length) and traits that affect survival of larvae (length and swimming performance) in a wild ...

2011
Gale Boyd Gang Zhang Ling Huang Martin D. Smith

1 The emergence of ecosystem-based management suggests that traditional fisheries man2 agement and protection of environmental quality are increasingly interrelated. Fishery 3 managers, however, have limited control over most sources of marine and estuarine pol4 lution and at best can only adapt to environmental conditions. We develop a bioeconomic 5 model of optimal harvest of an annual specie...

2017
Brett M. Taylor Eric Cruz

The Pacific longnose parrotfish Hipposcarus longiceps (Valenciennes 1840) represents a prime fishery resource throughout much of the tropical Pacific. In this study, we sampled the species from the Guam commercial fishery market across five consecutive years to characterize reproductive and age-based demographic information imperative for informed fishery management. Compared with other parrotf...

Journal: :Brazilian journal of biology = Revista brasleira de biologia 2012
A L Carmassi G Rondineli F C Ferreira F M S Braga

The aim of this work was to determine the composition of the fish assemblage of Passa Cinco stream and verify changes in their structure on the altitudinal gradient. Six samples were performed at five different sites in Passa Cinco stream (from the headwater, at order two, to its mouth, at order six), using an electric fishery equipment and gill nets in May, July, September and November of 2005...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2012
John Sibert Inna Senina Patrick Lehodey John Hampton

Over 50% of the total bigeye tuna (BET) landed in the Western Central Pacific Ocean is caught incidentally in the purse seine fishery and sold for canning at prices less than US$2/kg. The remainder is landed in longline fisheries directed at BET and sold as fresh or frozen tuna at prices greater than US$10/kg. The combined fishing mortality by all gears will soon reduce the BET biomass in the P...

1999
Jeffrey J. Polovina Pierre Kleiber Donald R. Kobayashi

The spiny lobster, Panulirus marginatus, is endemic to the Hawaiian Archipelago and Johnston Atoll. The species is found throughout the archipelago and is the target of a trap fishery in the northwestern portion of the archipelago known as the Northwestern Hawaiian Islands (NWHI). From the early 1980s to 1990, the majority of fishery catches came from two banks, Necker Island and Maro Reef, loc...

Journal: :Occupational medicine 2008
José Novalbos Pedro Nogueroles Mila Soriguer Francisco Piniella

BACKGROUND The conditions of work in the fisheries sector are arduous with high rates of occupational accidents. Numerous factors are known that can directly influence the health of the sailor or fisherman both in fishing and merchant fleets. AIM To evaluate the health status, safety and working conditions in the Andalusian fishing sector. METHODS Cross-sectional questionnaire study with pr...

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