نتایج جستجو برای: fishing rights

تعداد نتایج: 177355  

2011
Fraser A. Januchowski-Hartley Nicholas A. J. Graham David A. Feary Tau Morove Joshua E. Cinner

Prey flight decisions in response to predation risk are increasingly being considered in conservation and management decisions in the terrestrial realm, but are rarely considered in marine systems. This field-based study investigated how the behavioral response of coral reef fish families varied along a gradient of subsistence fishing pressure in Papua New Guinea. Specifically, we examined how ...

Journal: :IJMIC 2008
Lev Idels Mei Wang

In traditional harvesting model a fishing effort E is defined by the fishing intensity and does not address the inverse effect of fish abundance on the fishing effort. In this paper, based on a canonical differential equation model, we developed a new fishing effort model which relies on the density effect of fish population. This study concludes that a control parameter β( the magnitude of the...

2013
D.V. Politikos C.D. Maravelias D.E. Tzanetis

A stochastic age-structured population model was developed to explore biologically favourable levels of effort and closing periods within the sardine pelagic fishery in the eastern Mediterranean Sea. Results suggested that the developed age-structured model captured the observed biomass fluctuations and catches reasonably well and represents the first comprehensive investigation of alternative ...

2016
KangJae Jerry Lee David Scott Myron F. Floyd Michael B. Edwards

Using the multiple hierarchy stratification perspective (MHSP), this paper investigated Americans’ freshwater and saltwater fishing participation in 2011. Data from the 2011 National Survey of Fishing, Hunting, and Wildlife-Associated Recreation were examined using two hierarchical generalized linear models. Level 1 variables were age, education, sex (male, female), income, and race/ethnicity. ...

2009
ANNA KARPOWICZ

In this paper we consider the following problem. An angler buys a fishing ticket that allows him/her to fish for a fixed time. There are two locations to fish at the lake. The fish are caught according to a renewal process, which is different for each fishing location. The angler’s success is defined as the difference between the utility function, which is dependent on the size of the fish caug...

1999
S. F. THRUSH J. E. HEWITT V. J. CUMMINGS P. K. DAYTON M. CRYER S. J. TURNER G. A. FUNNELL R. G. BUDD C. J. MILBURN M. R. WILKINSON

Commercial fishing is one of the most important human impacts on the marine benthic environment. One such impact is through disturbance to benthic habitats as fishing gear (trawls and dredges) are dragged across the seafloor. While the direct effects of such an impact on benthic communities appear obvious, the magnitude of the effects has been very difficult to evaluate. Experimental fishing-di...

2017
Masaaki Sato Kentaro Honda Wilfredo H Uy Darwin I Baslot Tom G Genovia Yohei Nakamura Lawrence Patrick C Bernardo Hiroyuki Kurokochi Allyn Duvin S Pantallano Chunlan Lian Kazuo Nadaoka Masahiro Nakaoka

The establishment of marine protected areas (MPAs) can often lead to environmental differences between MPAs and fishing zones. To determine the effects on marine dispersal of environmental dissimilarity between an MPA and fishing zone, we examined the abundance and recruitment patterns of two anemonefishes (Amphiprion frenatus and A. perideraion) that inhabit sea anemones in different managemen...

2012
Gustavo M. Martins Francisco Arenas Ana I. Neto Stuart R. Jenkins

The potential population and community level impacts of fishing have received considerable attention, but little is known about how fishing influences communities' functional diversity at regional scales. We examined how estimates of functional diversity differed among 25 regions of variable richness and investigated the functional consequences of removing species targeted by commercial fisheri...

Journal: :Molecules 2016
Rongjie Zhuo Hao Liu Ningning Liu Yi Wang

Identification of active compounds from natural products is a critical and challenging task in drug discovery pipelines. Besides commonly used bio-guided screening approaches, affinity selection strategy coupled with liquid chromatography or mass spectrometry, known as ligand fishing, has been gaining increasing interest from researchers. In this review, we summarized this emerging strategy and...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2015
Timothy E Essington Margaret C Siple Emma E Hodgson Laura E Koehn Pamela E Moriarty Kiva L Oken Christine C Stawitz

In response to our recent paper (1), Szuwalski and Hilborn (2) make several points about the timing of recruitment failures, the effect of fishing on productivity, and our choice of using biomass, not recruitment, as the indicator for collapses. We address these points here to show that not only do they not affect our conclusions, but that we are largely in agreement regarding the biological pr...

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