نتایج جستجو برای: Fishing gears

تعداد نتایج: 16714  

2018
Jennifer C Selgrath Sarah E Gergel Amanda C J Vincent

Locally sustainable resource extraction activities, at times, transform into ecologically detrimental enterprises. Understanding such transitions is a primary challenge for conservation and management of many ecosystems. In marine systems, over-exploitation of small-scale fisheries creates problems such as reduced biodiversity and lower catches. However, long-term documentation of how governanc...

Journal: :iranian journal of fisheries science 0
b. md. rahman z. md. sazedul hoque m. md. rahman a. nahar

agunmukha river is an important water body having plentiful aquatic resources. the fisheries communities in the river are familiar with a diverse range of fishing gear and crafts to catch fish. therefore, the objectives of the present study were to explore fishing gear and fishing crafts, catch composition of the respective gearand identification of fish biodiversity of agunmukha river. a step ...

2008
David S. Boukal Erin S. Dunlop Mikko Heino Ulf Dieckmann

Commercial fishing utilizes a variety of gears, all of which are selective with respect to at least some phenotypic characteristics of individuals such as body size or girth. Empirical evidence is mounting that such fishing induces rapid evolutionary changes, with consequences for the size structure and dynamics of the exploited stocks. Here we present the results of life-history models designe...

2004
L. E. Morgan R. Chuenpagdee S. Maxwell E. A. Norse

An often overlooked aspect of fisheries management is the collateral impact of fishingbycatch and habitat damage. Discussions concerning the role of marine protected areas (MPAs) and fisheries management have focused on recovering depleted fish stocks through adult immigration or larval dispersal, but relatively little discussion has focused on the use of closed areas to address collateral impa...

2009
Anna Kuparinen Sakari Kuikka Juha Merilä

The study of fisheries-induced evolution is a research field which is becoming recognized both as an important and interesting problem in applied evolution, as well as a practical management problem in fisheries. Much of the research in fisheries-induced evolution has focussed on quantifying and proving that an evolutionary response has taken place, but less effort has been invested on the actu...

2009
Joshua E. Cinner Tim R. McClanahan Nicholas A. J. Graham Morgan S. Pratchett Shaun K. Wilson Jean-Baptiste Raina

1. Climate change is emerging as one of the greatest threats to coral reef ecosystems. Climate-induced warming events trigger coral bleaching and mortality, which can indirectly affect coral reef fishes. Managing fisheries across coral mortality events is expected to influence the persistence of species and reef recovery potential. The most common management recommendation has been to prohibit ...

Ghosh, Dipankar , Kumar Biswas, Jayanta,

Background: Oxbow lakes are abundant in indigenous fishes, but they are subject to unsustainable fishing practices, potential overexploitation, and indiscriminate use of fine-meshed fishing gear. To quantify the catch per unit effort (CPUE) and impact of fishing gears on fish abundance, a survey was carried out in an oxbow lake in eastern India. Methods: The gear-wise CPUE for fish caught in...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2014
Rebecca L Lewison Larry B Crowder Bryan P Wallace Jeffrey E Moore Tara Cox Ramunas Zydelis Sara McDonald Andrew DiMatteo Daniel C Dunn Connie Y Kot Rhema Bjorkland Shaleyla Kelez Candan Soykan Kelly R Stewart Michelle Sims Andre Boustany Andrew J Read Patrick Halpin W J Nichols Carl Safina

Recent research on ocean health has found large predator abundance to be a key element of ocean condition. Fisheries can impact large predator abundance directly through targeted capture and indirectly through incidental capture of nontarget species or bycatch. However, measures of the global nature of bycatch are lacking for air-breathing megafauna. We fill this knowledge gap and present a syn...

2017
Phillip Meintzer Philip Walsh Brett Favaro

Pots (also known as traps) are baited fishing gears widely used in commercial fisheries, and are being considered as a tool for harvesting Atlantic cod (Gadus morhua) in Newfoundland and Labrador, Canada. Pots produce lower environmental impacts than many other fishing gears, but they will only be a viable fishing strategy if they are efficient and selective at catching their target species. To...

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