I do not think that, practically or morally, we can defend a policy of saving every distinctive local population of organisms. I can cite a good rationale for the preservation of species, for each species is a unique and separate natural object that, once lost, can never be reconstituted. But subspecies are distinctive local populations of species with broader geographic range. Subspecies are dynamic, interbreedable, and constantly changing: what then are we saving by declaring them all inviolate?
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"The Golden Rule: A Proper Scale for Our Environmental Crisis", p. 43Stephen Jay Gould
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Firstly what does conservation mean? It is not merely the saving from extinction of such species as the Notornis, the Leadbetters Possum or the Leathery Turtle; this is important work but it is only part of the problem. You cannot begin to preserve any species of animal unless you preserve the habitat in which it dwells. Disturb or destroy that habitat and you will exterminate the species as surely as if you had shot it. So conservation means that you have to preserve forest and grassland, river and lake, even the sea itself. This is not only vital for the preservation of animal life generally, but for the future existence of man himself — a point that seems to escape many people.
Gerald Durrell
The history of most fossil species includes two features particularly inconsistent with gradualism: 1. Stasis. Most species exhibit no directional change during their tenure on earth. They appear in the fossil record looking much the same as when they disappear; morphological change is usually limited and directionless. 2. Sudden appearance. In any local area, a species does not arise gradually by the steady transformation of its ancestors; it appears all at once and “fully formed.”
Stephen Jay Gould
In the recent past, wolves were labeled a flagship species or an umbrella, indicator, or keystone species, depending on what conservation market one was trying to penetrate... A flagship species is an attraction to nearly all society's strata, but wolves are not welcomed by all factions of society. With a few rare exceptions, the rural world opposes wolves, so the animal's flagship role is restricted primarily to urbanites or to local areas. Wolves are certainly a powerful flagship species for the conservation movement, particularly that of affluent societies with strong lobbies in large cities, but a true flagship species should be able to move an entire society toward a goal.
Neither are wolves a good umbrella species (i.e., a species, usually high in the ecological pyramid, whose conservation necessarily fosters that of the rest of the chain) in that they can live well on a variety of food resources and in areas with an impoverished prey base. Wolves are not a keystone species either, in that they are not essential for the presence of many other species (e.g., herbivores flourish in areas devoid of wolves). And wolves are not necessarily indicators of good habitat quality or integrity because they are too generalist to be good indicators of the presence of a pristine trophic chain.
The above labels have been very useful in many circumstance and have contributed significantly to wolf recovery. They may still be useful in the future, but we should be aware that they are shortcuts to "sell a product" rather than good scientific grounds on which to build conservation.L. David Mech
The purpose of keeping any collection of wild animals in confinement should be threefold; first, to conduct as complete as possible a biological study of every species, especially those aspects which are too difficult or too costly to study in the wild and which may help in the preservation of that species in its natural habitat; second, to aid severely endangered species by setting up, under ideal conditions, protected breeding groups and, eventually, a reintroduction programme, so helping to ensure their future survival; thirdly, by the display and explanation of this work to the public, to persuade people of the vital necessity and urgency for the overall conservation of nature.
Gerald Durrell
Our best destiny, as planetary cohabitants, is the development of what has been called "species consciousness" — something over and above nationalisms, blocs, religions, ethnicities. During this week of incredulous misery, I have been trying to apply such a consciousness, and such a sensibility. Thinking of the victims, the perpetrators, and the near future, I felt species grief, then species shame, then species fear.
Martin Amis
Gould, Stephen Jay
Govorov, Leonid
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