Population dynamics of fisheries

Freidrich Heincke, a German fisheries biologist, influenced biologists to consider the population as the unit of study instead of the species. Insights from the Heincke’s paper helped to cultivate the influential quantitative methodology to distinguish marine fish populations. The application of statistical methods and quantification techniques in marine biology contributed to the generation of an enormous amount of knowledge related to fisheries. The shift of fishery biologists, Zoologists and wildlife

government they pay taxes to. This new age of technology allows access to information instantaneously and along with that comes the danger of misinformation, misrepresentation, and changes the dynamic between the government and population governed. The benefits can be seen relative to the Canadian fisheries example that will be discussed. Furthermore through the increased availability of accurate sources creates the opportunity for an involved, informed public. The trend toward open access to research

Climate Change Affects The Populations of the North American Fish The global climate change is affecting the fish populations and communities and changing the freshwater ecosystems in North America and Canada, according to four new studies. The studies were printed in a special issue of Fisheries magazine this week, published by the American Fisheries Society. The scientists observed different changes in how inland fish reproduce, grow and where they can live. Doug Austen, Executive Director of

Protected Areas (MPA) is increasing all around the world (Lubchenco et al, 2003) due to two main reasons: (1) recognition of expanding threats to marine ecosystems; and (2) acknowledgment about the consequences of marine ecosystem break-down to human populations (Roberts et al,2003; Lubchenco et al, 2003). The reality scenario is that people do depend on the ecosystem (Walker & Salt,2006). People depend on the ecosystem directly through exploitation of natural resources but also indirectly through ecosystem

Fish Stock Assessments A fish stock assessment is the method of gathering information to provide to fisheries in order for them to manage their fish stock and their yield in order to not over fish. These assessments gather different data about the fish in the region including age structure, age at spawning, natural mortality, fish mortality, spawning behavior, and many more. There are also different ways to collect this type of data, which this paper will cover. Stock Assessments For starters

Evaluation of microsatellite cross amplification for population genetic study of Caribbean Sharpnose shark Rhizoprionodon porosus (Carcharhinidae) in Colombian Caribbean. The Caribbean sharpnose shark, Rhizoprionodon porosus is an important resource for artisanal small-scale fisheries. It is one of the most abundant coastal sharks within its distribution range, and plays an important role as a predator in coastal marine ecosystems. For its coastal habits, it is susceptible to intensive extraction

Giant otter populations have suffered since the 1940s different anthropic pressures: hunting for skins (1940-1975), gold mining (mercury contamination), deforestation, human population growth and increased demand for fishery resource, for consumption and sale. The latter scenario, along with processes of loss of ancestral knowledge and cultural traditions of indigenous peoples and their entry into active participation in the market, have blunted the ancestral coexistence between Amazonian indigenous

Why and how should we regulate coastal fisheries Coastal fisheries of the UK offer a vast amount of importance to us for things like food and medications, but after decades of over fishing and destructive fishing methods our fish stocks have been left severly depleted. Across the UK there has been a lot of initiatives towards managing our coastal fisheries to meet both environmental and economic goals. The need for regulating coastal fisheries is not a new idea, it has been used for several hundred

(Perca flavenscens) Food Chain Dynamics in Lac la Biche, Alberta Proposal Jacob Thalen, Feb, 5, 2015 ThalenJ2@mymacewan.ca MacEwan University, Department of Biology Done in part for the requirements of BIOL 498 under the supervision of Dr. David Locky & Dr. Mrinal Das. MacEwan University, Department of Biology.   Abstract: Trophic cascades are powerful forces that have a pronounced effect on ecosystems. They occur when predation causes shifts in prey dynamics that indirectly lead to enhanced

comparatively sparsely distributed so, they possess biological peculiarities and an ecological role that indicates that they could by particularly sensitive to an increase in fishing.” So this article shows that the life history itself affects their population. The slow growing, the low potential to produce offsprings and mature late are also big