In laymen's terms: Maximum sustained yield (MSY) - is used in game management to ensure the highest growth rate by manipulating the natural 1:1 sex ratio. For example, by allowing the killing of mostly males, which are desirable as trophies over females because of their racks, it is calculated that one male can impregnate many females (much as cattle on ranches, or chicken farms, where they may have only one rooster). It has also been found though studies in FL that in hunted herds, deer have twins/triplets at the rate of 38%, whereas in non-hunted herds this occurs only at the rate of 14%. What state wildlife agencies actually do is "game" management, NOT wildlife management (which they claim to do). They manipulate only certain species for surplus that are desirable and preferred for lucrative hunting.
Maximum sustainable yield - There's a lot of propaganda and half-truths in this explanation, specifically regarding biological carrying capacity vs. social carrying capacity, which they never acknowledge. To some people, one deer is too many! In population ecology <http://en.wikipedia.org/wiki/Population_ecology> and economics <http://en.wikipedia.org/wiki/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 <http://en.wikipedia.org/wiki/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 <http://en.wikipedia.org/wiki/Logistic_function> , 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 <http://en.wikipedia.org/wiki/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 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 <http://en.wikipedia.org/wiki/Optimum_sustainable_yield> and <http://en.wikipedia.org/w/index.php?title=Maximum_economic_yield&action=edi t&redlink=1> maximum economic yield. From: felvtalk-boun...@felineleukemia.org [mailto:felvtalk-boun...@felineleukemia.org] On Behalf Of dot winkler Sent: Tuesday, September 13, 2011 10:54 AM To: felvtalk@felineleukemia.org Subject: Re: [Felvtalk] Hunters/PLEASE EXPLAIN Please explain what you mean by "managed for maximum sustained yield". _____ From: Natalie <at...@optonline.net> To: felvtalk@felineleukemia.org Sent: Tuesday, September 13, 2011 8:10 AM Subject: Re: [Felvtalk] Hunters Actually, the deer aren't responsible for overpopulation; they are "managed" for maximum sustained yield, for only one reason: to supply better hunting opportunities and revenues from hunting license fees. If they were left alone, their numbers would be normal, and just enough to fill the biological carrying capacity of an area that can sustain their numbers. And, yet, you always hear: Isn't it kinder to kill them than to let them starve? Then why would they want such skinny deer? Because they really care only about that rack, and a few lbs of meat are irrelevant. -----Original Message----- From: felvtalk-boun...@felineleukemia.org [mailto:felvtalk-boun...@felineleukemia.org] On Behalf Of Lynda Wilson Sent: Tuesday, September 13, 2011 7:02 AM To: felvtalk@felineleukemia.org Subject: Re: [Felvtalk] Hunters It just breaks my heart when we lived in Austin, Tx that there were so many deer starving, they would shoot them rather than feed them. In fact, I worked for a CPA that would litterally climb a tree and have a pile of corn on the ground, wait for the deer to start eating and shoot it. It made me sick and I certainly gave him my opinion on it. Deer are such beautiful animals. ----- Original Message ----- From: "Lorrie" <felineres...@frontier.com> To: <felvtalk@felineleukemia.org> Sent: Tuesday, September 13, 2011 4:37 AM Subject: Re: [Felvtalk] Hunters > On 09-12, dot winkler wrote: >> Hysterical! L.O.L. I love it. The thing is, yes, some of them hunt >> and actually use the meat - smoke it, make sausage with it (yuck!). At >> least they are eating the deer. But the thing is, the animal is so >> beautiful a creature to behold and so delicate. How can anyone have >> the heart to kill them? They are graceful and grace our woods and >> lands. To see one in your yard is a special and breathtaking sight. >> I don't see how anyone could do it. >> >> _________________________________________________________________ > > I could never kill a deer. Many deer come to our yard, and they are > so beautiful. Last winter some bastard shot the leg off one of them. > It was right at the knee and it was just dangling for weeks. Finally > it dropped off and thankfully it never got infected. She still comes > to our house, and still keeps up with her group. She's an amazing, > brave little doe and we call her "Tripod". > > Lorrie > > > Tripod and she > in > our yard > > _______________________________________________ > Felvtalk mailing list > Felvtalk@felineleukemia.org > http://felineleukemia.org/mailman/listinfo/felvtalk_felineleukemia.org > _______________________________________________ Felvtalk mailing list Felvtalk@felineleukemia.org http://felineleukemia.org/mailman/listinfo/felvtalk_felineleukemia.org _______________________________________________ Felvtalk mailing list Felvtalk@felineleukemia.org http://felineleukemia.org/mailman/listinfo/felvtalk_felineleukemia.org
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