نتایج جستجو برای: catchability
تعداد نتایج: 207 فیلتر نتایج به سال:
Abstract Polyommatus exuberans is an evolutionarily significant unit (ESU) of the lycaenid butterfly ripartii . This ESU known to survive at only two sites in Susa Valley (NW Italy). Lack correct management, reforestation and frequent wildfires severely threaten this (listed as endangered species most recent IUCN Italian Red List). Although taxonomic rank taxon still debated, current threats co...
While hanging nets may have fewer overall environmental impacts than towed gears, they still catch unwanted species and sizes, which are then discarded. Gillnets one of the most common types used in Mediterranean small-scale fisheries, with commercial catches discards containing a diverse range fish invertebrate species. In this study, profile gillnets Thermaikos Gulf (NE Mediterranean) was ana...
The little information available on fuel consumption and emissions by high seas tuna fisheries indicates that the global fleet may have consumed about 2.5 Mt of in 2009, resulting production 9 CO2-equivalent greenhouse gases (GHGs), i.e., 4.5–5% fishing emissions. We developed a model annual for large-scale purse seiners operating western Indian Ocean as function effort, strategy, vessel charac...
In the midst of several management failures, marine reserves are seen as a potential management tool to control overexploitation. In the literature, both modelling and empirical work have demonstrated that closing an area to fishing would lead to an increase in biomass and mean body size within the reserve. Benefits, in the form of increased catch, outside the reserves are sometimes shown using...
BACKGROUND Cancer incidence and prevalence estimates are necessary to inform health policy, to predict public health impact and to identify etiological factors. Registers have been used to estimate the number of cancer cases. To be reliable and useful, cancer registry data should be complete. Capture-recapture is a method for estimating the number of cases missed, originally developed in ecolog...
Analyses of operational-level, longline catch and effort data for bigeye tuna in the Western and Central Pacific Ocean were carried out under an agreement between the Secretariat of the Pacific Community and the Japan National Research Institute of Far Seas Fisheries. The objectives of the collaboration were to standardize bigeye CPUE, and to estimate the historical trend of longline catchabili...
The applicability of a nightlight lift-net for sampling ichthyoplankton assemblages was evaluated in inshore habitats off southwestern Puerto Rico. The effects of lunar periodicity, habitat, light duration, and gear type (nightlight vs. plankton tow) were investigated. Overall, 36 piscine taxa were collected with the nightlight lift-net from inshore habitats (i.e. coral reef, mangroves, seagras...
increase in the hospital specialties. This cohort was surveyed for the first time several years into the qualifiers' medical careers. We are cautious about interpreting recalled career choices because they may be influenced by the passage of time. None the less, the decline in choice of general practice as a first career between 1983 and 1988 and between 1988 and 1993 suggests that interest in ...
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