نتایج جستجو برای: hunting and fishing
تعداد نتایج: 16831426 فیلتر نتایج به سال:
We humans live on a finite planet. Yet, our numbers have been increasing exponentially for thousands of years and continue to do so. At the turn of the century we numbered over 6 billion (United Nations, 1999). During the early 1980s, the human ecological footprint (Wackernagel and Rees, 1996) surpassed Earth’s capacity to maintain our current lifestyles and, by the end of the twentieth century...
Simulations testing the future impacts of harvest and climate change to the Hudson Bay marine ecosystem were created utilizing an existing Ecopath with Ecosim model (Hoover et al., in this issue). Building on past simulations depicting known changes to the region, a suite of future scenarios was constructed to include a variety of climate change and harvest levels. Previously identified ecosyst...
We modeled hunting demand among resident hunters in the Southeastern United States. Our model revealed that future hunting demand will likely decline in this region. Population growth in the region will increase demand but structural change in the region's demography (e.g., "browning" and "aging "), along with declining forestland access will decrease hunting demand. The results suggested that ...
The reduction of game and fish populations has increased investment in management practices. Hunting and fishing managers use several tools to maximize harvest. Managers need to know the impact their management has on wild populations. This issue is especially important to improve management efficacy and biodiversity conservation. We used questionnaires and field bird surveys in 48 hunting esta...
It is argued that trophy hunting of large, charismatic mammal species can have considerable conservation benefits but only if undertaken sustainably. Social-ecological theory suggests such sustainability only results from developing governance systems that balance financial and biological requirements. Here we use lion (Panthera leo) trophy hunting data from Tanzania to investigate how resource...
Abstract The territory of the Wayuu indigenous people comprises a small, low mountain range surrounded by large desert that extends from Colombia to Venezuela in Guajira peninsula. In pre-Columbian times, livelihoods relied mainly on fishing and hunting littoral zone. Following Spanish conquest, their fight maintain territorial integrity they turned rearing cattle, goats, sheep captured colonis...
Dolphin hunting for fishing bait in Bahía Solano, Chocó, Colombia, was evaluated during eight months, between July 2005 and April 2006. Interviews were conducted with 122 fishermen (18.2% of the registered zone), who cover at most 890km2 when (approximately 2.3% Pacific Territorial Sea Colombia), data obtained from landings a company. Only using longlines (37.3%) confirmed dolphins as bait. It ...
An ecosystem model was created for the Hudson Bay region, Canada, for 1970–2009, aiming to identify ecosystem linkages while bringing together research from diverse sources. The model presented here in detail includes 40 functional groups. Using the Ecopath with Ecosim (EwE) modelling framework we are able to provide estimates for previously unknown parameters such as the biomass of fish specie...
Fisheries bycatch is a widespread and serious issue that leads to declines of many important and threatened marine species. However, documenting the distribution, abundance, population trends and threats to sparse populations of marine species is often beyond the capacity of developing countries because such work is complex, time consuming and often extremely expensive. We have developed a flex...
We consider a hunting area and a wildlife reserve and answer the question: How does clever migration decision affect the social optimal and the private optimal hunting levels and population stocks? We analyze this in a model allowing for two-way migration between hunting and reserve areas, where the populations’ migration decisions depend on both hunting pressure and relative population densiti...
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