نتایج جستجو برای: fishers equation
تعداد نتایج: 231415 فیلتر نتایج به سال:
To gain a better understanding of the factors affecting selection of reproductive habitat by female fishers (Martes pennanti) in boreal mixed-wood forests, we identified structures, sites, and stands used by 12 radiotagged female fishers for reproduction between 2005 and 2009 near Dawson Creek, British Columbia, Canada. We deployed a used-unused design to evaluate the support by the data for a ...
Postapartheid fisheries reform in South Africa, through the Marine Living Resources Act (MLRA) 18 of 1998, used individual transferable quotas (ITQs) to broaden resource access through allocating quotas to new entrants, even though the system has been created to reduce capacity through a reduction in the number of active fishers. The formal action space created through fisheries reform in South...
Fishing in the area of Cachoeira de Emas dates from the aboriginal Painguás who inhabited its margins. The socioeconomic conditions of the fishers and fishing are described, derived from personal interviews with 33 fishers. Their mean age is 48.6 years and they have been fishing on average for 24.2 years. The monthly total raw income is US$ 575.52 and the raw income just from fishing is of US$ ...
Fishers’ trip choice behavior in Hawaii’s longline fishery was analyzed by applying a utility theoretic mixed model (a combination of the conditional and multinomial logit (unordered) models) which accounts for both choiceand individual-specific attributes. The results indicate that fishers demonstrated utility maximizing and risk-averse behavior. They exhibited ‘inertia’ in switching to altern...
در ابتدا به طور مختصر ارتباط بین مسائل تغییراتی و معادلات دیفرانسیل را بیان می کنیم. همان طور که می دانیم هر معادله دیفرانسیل را می توان به صورت egin{equation} label{yek} a(u)= 0 end{equation} نوشت، که در آن $ a(u) $ یک عملگر دیفرانسیل معمولی یا جزئی خطی یا غیرخطی و $ u $ مجهول می باشد. برای حل این معادلات و به خصوص معادلات دیفرانسیل جزیی غیرخطی راه حل مشخصی وجود ندارد.حساب تغییر...
In response to a sharp decline in recreational fishing participation in Queensland, Australia, I sought to identify constraints experienced by fishers in Queensland and understand how demographic variables, fishing participation variables, and fishing motivations influence the amount and type of constraints experienced. In a survey of Queensland recreational fishers, 70% reported experiencing c...
In Iceland, as in many places globally, the detrimental impacts of whale interactions with fishing gear on both fisheries and whales are not well understood managed. This study conducted anonymous questionnaires Icelandic fishers interviews capelin purse seine boat captains to gather first-hand knowledge issues face due interaction their gear. Results suggest that humpback is large species most...
Fishers pay attention to where other fishers are fishing, suggesting the potential for peer effects. But peer effects are difficult to identify without an exogenous shifter of peer group membership. We propose an identification strategy that exploits a shifter of peer group membership: gold rushes of new entrants. Following an exchange-rateinduced gold rush in an American fishery, we find that ...
Customary management systems (i.e., management systems that limit the use of marine resources), such as rotational fisheries closures, can limit harvest of resources. Nevertheless, the explicit goals of customary management are often to influence fish behavior (in particular flight distance, i.e., distance at which an organism begins to flee an approaching threat), rather than fish abundance. W...
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