Maximum Sustainable Yield

In population ecology and economics, maximum sustainable yield or MSY is theoretically, the largest yield (or catch) that can be taken from a species' stock over an indefinite period. Fundamental to the notion of sustainable harvest, the concept of MSY aims to maintain the population size at the point of maximum growth rate by harvesting the individuals that would normally be added to the population, allowing the population to continue to be productive indefinitely. Under the assumption of logistic growth, resource limitation does not constrain individuals’ reproductive rates when populations are small, but because there are few individuals, the overall yield is small. At intermediate population densities, also represented by half the carrying capacity, individuals are able to breed to their maximum rate. At this point, called the maximum sustainable yield, there is a surplus of individuals that can be harvested because growth of the population is at its maximum point due to the large number of reproducing individuals. Above this point, density dependent factors increasingly limit breeding until the population reaches carrying capacity. At this point, there are no surplus individuals to be harvested and yield drops to zero. The maximum sustainable yield is usually higher than the optimum sustainable yield and maximum economic yield.

MSY is extensively used for fisheries management. Unlike the logistic (Schaefer) model, MSY has been refined in most modern fisheries models and occurs at around 30% of the unexploited population size. This fraction differs among populations depending on the life history of the species and the age-specific selectivity of the fishing method.

However, the approach has been widely criticized as ignoring several key factors involved in fisheries management and has led to the devastating collapse of many fisheries. As a simple calculation, it ignores the size and age of the animal being taken, its reproductive status, and it focuses solely on the species in question, ignoring the damage to the ecosystem caused by the designated level of exploitation and the issue of bycatch. Among conservation biologists it is widely regarded as dangerous and misused.

Read more about Maximum Sustainable Yield:  History, Overfishing, Optimum Sustainable Yield

Other articles related to "sustainable, maximum sustainable yield, yield, sustainable yield, maximum":

Sustainable Flooring - Natural and Recycled Carpet
... There are carpets that are sustainable, using natural fibers such as cotton, sisal, wool, jute and coconut husk ... Handmade Citapore rugs include a wide range of sustainable flooring material as these rugs are generally made from cotton (both virgin and recycled), jute, rayon and cotton chennile ... This is sustainable and it reduces material sent to landfill further it uses dyeing methods that are less polluting and require less energy than other flooring ...
Sustainable Yield In Fisheries - Maximum Sustainable Yield
... See also Maximum sustainable yield In population ecology and economics, maximum sustainable yield or MSY is, theoretically, the largest yield/catch that can be taken from a species ... The maximum sustainable yield is usually higher than the optimum sustainable yield ... The idea of maximum sustained yield is to decrease population density to the point of highest growth rate possible ...
Sustainable Gardening
... Sustainable gardening (which is taken here to include sustainable landscapes, sustainable landscape design, sustainable landscape architecture and sustainable ... economic factors in an attempt to create a more sustainable future ... Organic gardening and the use of native plants are integral to sustainable gardening ...
Stock Assessment - Biological Reference Points
... is the fishing mortality that produces the maximum sustainable yield, and Emsy is the expected level of fishing that will produce the maximum sustainable yield ... stock biomass, SSBmsy is the amount of spawning stock biomass needed to produce the maximum sustainable yield, and MSST is the minimum standing stock threshold ... MSY is the maximum sustainable yield and OY is the optimum yield of a stock ...
Maximum Sustainable Yield - Optimum Sustainable Yield
... See also Optimum sustainable yield In population ecology and economics, optimum sustainable yield is the level of effort (LOE) that maximizes the difference between ... corresponds to an effort level lower than that of maximum sustainable yield ... In environmental science, optimum sustainable yield is the largest economical yield of a renewable resource achievable over a long time period without ...

Famous quotes containing the words yield and/or maximum:

    While the white man keeps the impetus of his own proud, onward march, the dark races will yield and serve, perforce. But let the white man once have a misgiving about his own leadership, and the dark races will at once attack him, to pull him down into the old gulfs.
    —D.H. (David Herbert)

    I had a quick grasp of the secret to sanity—it had become the ability to hold the maximum of impossible combinations in one’s mind.
    Norman Mailer (b. 1923)