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Isidore of Seville (560–636) distinguished between "cattle", a term for animals that had been domesticated, and "beasts" or wild animals, as did Thomas Aquinas (1225–1274). [17] The English jurist William Blackstone (1723–1780) wrote of domesticated animals, in Commentaries on the Laws of England (1765–1769):
An unexpected result of the UNTB is that at very large sample sizes, predicted relative species abundance curves describe the metacommunity and become identical to Fisher's logseries. At this point θ also becomes identical to Fisher's α {\displaystyle \alpha \,\!} for the equivalent distribution and Fisher's constant x is equal to the ratio ...
Habitat is destroyed by clearing forests and converting land to grow feed crops and for grazing, while predators and herbivores are frequently targeted because of a perceived threat to livestock profits; for example, animal husbandry causes up to 91% of the deforestation in the Amazon region. [91] In addition, livestock produce greenhouse gases.
CAMPFIRE was initiated in 1989 by the Zimbabwean government as a program to support community-led development and sustainable use of natural resources. [2] The 1975 Parks and Wildlife Act set the legal basis for CAMPFIRE by allowing communities and private landowners to use wildlife on their land, marking a substantial shift from colonial policy that made it illegal for local populations to ...
Fisher market is an economic model attributed to Irving Fisher. It has the following ingredients: [ 1 ] A set of m {\displaystyle m} divisible products with pre-specified supplies (usually normalized such that the supply of each good is 1).
Because different species have different ecological niches, with horses for example grazing short grass, cattle longer grass, and goats or deer preferring to browse shrubs, niche differentiation allows a terrain to have slightly higher carrying capacity for a mixed group of species, than it would if there were only one species involved.
Continuous grazing by sheep or cattle is a widespread extensive farming system, with low inputs and outputs.. Extensive farming most commonly means raising sheep and cattle in areas with low agricultural productivity, but includes large-scale growing of wheat, barley, cooking oils and other grain crops in areas like the Murray-Darling Basin in Australia.
Carrying capacity – the supportable population of a species, given the food, habitat conditions and other resources available within a fishery. Casting – the act of throwing bait or a lure over the water, using a fishing rod. Catadromous – fish that live their adult lives in fresh water lakes or rivers but migrate down rivers to spawn in ...