نتایج جستجو برای: but catch

تعداد نتایج: 2063848  

Knowledge of fish diversity, population data and the stock size, and calculation of the amount of proper catch are essential for a wise and sustainable management of lakes. This research reports a study on fish populations in Dorudzan reservoir, Fars Province. The fish were sampled from three stations in the late Summer and mid Spring 2015, three days each, using nylon gill nets. The mean lengt...

2011
Shelley Clarke Shelton Harley Simon Hoyle Joel Rice

Longline and purse seine logsheet and observer datasets held by SPC-OFP were examined to assess the stock status of eight WCPFC key shark species. Both longline and purse seine logsheet datasets suffer from missing shark catch records and a lack of species-specific recording, therefore the indicator analysis was based on observer data only. Shark data from the observer data sets are, however, a...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2017
Stefan Meyer Bruce C Robertson B Louise Chilvers Martin Krkošek

Declines of marine megafauna due to fisheries by-catch are thought to be mitigated by exclusion devices that release nontarget species. However, exclusion devices may instead conceal negative effects associated with by-catch caused by fisheries (i.e., unobserved or discarded by-catch with low postrelease survival or reproduction). We show that the decline of the endangered New Zealand (NZ) sea ...

2007
Amanda M. Durik Judith M. Harackiewicz

Individual interest was examined as a moderator of effects of situational factors designed to catch and hold task interest. In Study 1, 96 college students learned a math technique with materials enhanced with collative features (catch) versus not. Catch promoted motivation among participants with low individual interest in math (IIM) but hampered motivation among those with high IIM. In Study ...

2011
Shelley Clarke Kotaro Yokawa Hiroaki Matsunaga Hideki Nakano

This paper analyses North Pacific longline operational data from research and training vessel surveys (1992-2008) and commercial longline logbook records (1993-2008) provided by Japan for onsite analysis in Shimizu during January-March 2011. Both data sets required filtering to remove records believed to under-report actual shark catches. The analysis was based on 7,974 sets representing 10 ves...

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 ...

2018
Clare Sampson Anca D Covaci James G C Hamilton Nayem Hassan Shakir Al-Zaidi William D J Kirk

The greenhouse whitefly Trialeurodes vaporariorum (Westwood) (Hemiptera: Aleyrodidae) is a pest of a wide range of vegetable and ornamental crops in greenhouses around the world. Yellow sticky traps are highly attractive to flying adults and so are frequently used to monitor the pest. Our aim was to test whether changes in trap translucency or the addition of printed black patterns could increa...

Journal: :ecopersia 2011
hasan fazli

this study evaluates changes in species composition, catch, and cpue of three species of kilkas in the caspian sea from 1961 to 2009. the effects of fluctuations in sea level rise and fall on the catch of kilka as well as the impacts of a recent invasion by mnemiopsis leidyi (ctenophora) were assessed in terms of species composition and cpue of kilkas in the iranian coastal region of the caspia...

2002
Graham J. Pierce Jamie Dyson Eoghan Kelly Jacqueline D. Eggleton Paul Whomersley Iain A. G. Young M. Begoña Santos Jianjun Wang Nicola J. Spencer

Observers were placed on pelagic vessels in the Scottish fisheries for mackerel (Scomber scombrus), herring (Clupea harengus), “maatje” herring (herring caught just before their first spawning) and argentines (Argentina silus) to monitor by-catch composition and discarding practices. A total of 67 days was spent at sea, 11 on the argentine fleet, 28 on the herring fleet, 12 on the “maatje” herr...

Journal: :CoRR 2015
Max Tegmark

∗Based on my talk at the symposium The Dynamics of Possible Nuclear Extinction held February 28–March 1 2015 at The New York Academy of Medicine: http://totalwebcasting.com/view/ ?id=hcf cided to build a contraption called the Spectacular Thermonuclear Unpredictable Population Incineration Device, abbreviated STUPID. It’s arguably the the most costly device ever built on this beautiful spinning...

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