Nature

"...predator avoidance can lead to delayed ontogenetic niche shifts, resulting in decreased growth rates"

"Populations exposed to varying predation threats, over time, may be selected toward the use of a learned response, because it would allow individuals to optimize the threat-sensitive trade-offs between survival and other fitness related benefits."

"A more common strategy some insects employ to avoid bad predation is to continue flying at night but to vary their seasonal activity (either just after or before bats hibernate)."

"Regardless of whether one defines predator-prey interactions narrowly or broadly, what is clear is that at one point or another in the lives of most animals they are predators, prey, or both."

"What is a predator? The answer is relatively straightforward for many species: an animal that eats another animal. However, recent research has shown that for other species the answer is more complex and that predatory species may not be as diet-limited as previously assumed."

"Variation in plant food, especially flowers, has a strong effect on the dispersal of most omnivorous insect predators."

"Well, let me tell you, ants are the dominant insects. They make up as much as a quarter of the biomass of all insects in the world. They are the principal predators. They're the cemetery workers."

"Trinidadian guppies from a high-predation population exhibited a more intense antipredator response than conspecifics from a low-predation-risk population."

"Whether a species is a traditional predator (or an omnivore), or whether it responds to predation risk with fixed rather than learned behaviors, its success as a predator or a prey is determined by the capacity and efficiency of its sensory organs."

"Interactions between predators and prey are a major driving force for evolution and adaptation in animals. In any single encounter, the prey has more at stake, because failure means death, whereas the predator misses only a feeding opportunity."

"Both predation and predator evasion are expensive and themselves dangerous. Some of the costs are metabolic, and these costs have been studied at length. Potentially more important, however, are the structural and behavioral trade-offs animals must make to be successful predators or long lived prey."

"The ability of animals to perceive changes in predation risk forms the foundation on which the nonlethal effects of predators are transmitted to prey populations and communities."

"Sensory compensation is probably common in animals, for just about every species has at least two sensory modes that might be directed toward predator detection."

"The Challenge of Eating versus Being Eaten: Most prey that respond to predators also face a trade-off between increased survival in the presence of predators and slower growth and development. For example, many species of rotifers and cladocerons develop spines in response to fish and invertebrate predators."

"What had been released into the desert vacuum and starry oases of the galaxy was the inexorable logic of reproduction and natural selection. What followed was parasitism, predation, symbiosis, interdependency—chaos, complexity, life."

"In prehistoric times, Homo sapiens were deeply endangered. Early humans were less fleet of foot, with fewer natural weapons and less well-honed senses than all the predators that threatened them. Moreover, they were hampered in their movements by the need to protect their uniquely immature young - juicy meals for any hungry beast."

"Historically, predation and competition has received much more attention than mutualism. This bias is exemplified in the attention given to inter-specific interactions in ecology textbooks."

"Predation can not become the habitual, conventional resource of any group or any class until industrial methods have been developed to such a degree of efficiency as to leave a margin worth fighting for, above the subsistence of those engaged in getting a living....The early development of tools and of weapons is of course the same fact seen from two different points of view. ...The predatory phase of culture is therefore conceived to come on gradually."

"When the predatory habit of life has been settled upon the group by long habituation, it becomes the able-bodied man's accredited office in the social economy or elude him, to overcome and reduce to subservience those alien forces that assert themselves refractorily in the environment."

"Man and animals are really the passage and the conduit of food, the sepulchre of animals and resting place of the dead, one causing the death of the other, making themselves the covering for the corruption of other dead [bodies]."

"[W]hile many animals appear to endure such conditions rather calmly, this doesn't necessarily mean they aren't suffering. Sick and injured members of a prey species are the easiest to catch, so predators deliberately target these individuals. As a consequence, those prey that appear sick or injured will be the ones killed most often. Thus, evolutionary pressure pushes prey species to avoid drawing attention to their suffering."

"Nature can be cruel. Predators are everywhere. Those who don't need to be protected from outside forces often need to be protected from themselves. In society, women are referred to as "the fairer sex". But in the wild, the female species can be far more ferocious than their male counterparts. Defending the nest is both our oldest and strongest instinct. And sometimes, it can also be the most gratifying."

"And even for the survivors, life involves a constant struggle to find enough food, avoid predators, and overcome sickness and injury for a few brief years (or months) before death comes at the jaws of a predator or the grip of a parasite. Pain is a powerful motivational tool, and evolution has no qualms about using it to maximum effect."

"The simple facts are that both predation and starvation are painful prospects for deer, and that the lion's lot is no more enviable."

"An individual's response to local predation risk is shaped by the conflicting demands of predator avoidance and the benefits associated with a suite of fitness-related behaviors, such as foraging, mating and terrestrial defense."

"Earth has no more distressing spectacle than that of a predator suddenly striking down some defenseless creature innocently singing or attending its young, no sight more pitifully repulsive than the hideously mangled remains of what, a few hours before, was a beautiful animal enjoying its life."

"[Predation is] a great evil that a wise or benevolent creator would have avoided."

"Not long ago I was sleeping in a cabin in the woods and was awoken in the middle of the night by the sounds of a struggle between two animals. Cries of terror and extreme agony rent the night, intermingled with the sounds of jaws snapping bones and flesh being torn from limbs. One animal was being savagely attacked, killed and then devoured by another. [I]t seems to me that the horror I experienced on that dark night in the woods was a veridical insight. What I experienced was a brief and terrifying glimpse into the ultimately evil dimension of a godless world."

"I think that most people would associate big schools of fish with healthy coral reefs. At Kingman, the predators keep the herd thin, so there aren't a lot of big fish schools."

"Remove the predators, and the whole ecosystem begins to crash like a house of cards. As the sharks disappear, the predator-prey balance dramatically shifts, and the health of our oceans declines."

"I have come to view vegetarianism as a standing protest against predation, which is life's greatest evil. If there were no other argument in its favor, that would be sufficient."

"For many decades, ecology textbooks presented classical competition theory without reservation. The central principle here is that two species sharing an essential resource that is in limited supply cannot coexist for long because the competitively superior species will eliminate the other one. The implication is that ecological communities should be characterized by division of resources among species, or niche partitioning. Predation and physical disturbance inflict so much damage on biotas of the seafloor that populations of one species seldom monopolize a potentially limiting resource, except sporadically and locally. As a result, it is uncommon for any species to drive another to extinction through competitive exclusion—or even to force another species to drastically change its exploitation of any environmental resource throughout its geographic range."

"[H]e saw in Java a plain far as the eye could reach entirely covered with skeletons, and took it for a battlefield; they were, however, merely the skeletons of large turtles, five feet long and three feet broad, and the same height, which come this way out of the sea in order to lay their eggs, and are then attacked by wild dogs , who with their united strength lay them on their backs, strip off their lower armour, that is, the small shell of the stomach, and so devour them alive. But often then a tiger pounces upon the dogs. Now all this misery repeats itself thousands and thousands of times, year out, year in. For this, then, these turtles are born. For whose guilt must they suffer this torment? Where fore the whole scene of horror? To this the only answer is: it is thus that the will to live objectifies itself."

"One simple test of the claim that the pleasure in the world outweighs the pain [...] is to compare the feelings of an animal that is devouring another with those of the animal being devoured."

"I bought from some villagers a young osprey they had caught on a sandbank, in order to rescue it from their cruel hands. But then I had to decide whether I should let it starve, or kill a number of small fishes every day in order to keep it alive. I decided on the latter course, but every day the responsibility to sacrifice one life for another caused me pain."

"Baldner contends that is "arrogant" and "paternalistic" morally to condemn something as definitive of the natural order as predation. However, it is in the nature of morality to devise ideals of a better world and to work toward realizing them. This entails judging this world to be less than ideal and working to change it. One could restrict moral evaluations to the products of human activity, but that would be arbitrary: what makes suffering (prima facie) morally bad is not that it is the result of human activity but that it is suffering. Our commitment to making the world a morally better place impels us to make moral evaluations of the natural order. There need be nothing either arrogant or paternalistic in making and acting on such evaluations, provided we recognize the very limited nature of our understanding and our power to make improvements."

"Where we can prevent predation without occasioning as much or more suffering than we would prevent, we are obligated to do so by the principle that we are obligated to alleviate avoidable animal suffering. Where we cannot prevent or cannot do so without occasioning as much or more suffering than we would prevent, that principle does not obligate us to attempt to prevent predation."

"[A]nimals are not just subject to suffering like man, but subject to much more suffering; their existence is considered to be extremely unhappy, not only because they are exploited and tortured by man but also in nature itself, where the weaker one is threatened and devoured by the stronger, and, moreover, because at least many of them live on disgusting food or in uncomfortable places."

"It must be admitted that the existence of carnivorous animals does pose one problem for the ethics of Animal Liberation, and that is whether we should do anything about it. Assuming that humans could eliminate carnivorous species from the earth, and that the total amount of suffering among animals in the world were thereby reduced, should we do it?"

"Naysayers at their polite best chided the rewilders for romanticizing the past; at their sniping worst, for tempting a 'Jurassic Park' disaster. To these the rewilders quietly voiced a sad and stinging reply. The most dangerous experiment is already underway. The future most to be feared is the one now dictated by the status quo. In vanquishing our most fearsome beasts from the modern world, we have released worse monsters from the compound. They come in disarmingly meek and insidious forms, in chewing plagues of hoofed beasts and sweeping hordes of rats and cats and second-order predators. They come in the form of denuded seascapes and barren forests, ruled by jellyfish and urchins, killer deer and sociopathic monkeys. They come as haunting demons of the human mind. In conquering the fearsome beasts, the conquerors had unwittingly orphaned themselves."

"At the top of the pyramid—the terminal step—is a population of predators not generally subject to predation themselves."

"Think about Praying Mantis. The deadliest ninja predator. Why isn't his animus a lion or a polar bear - two of the most successful killing machines in the animal kingdom? The answer is that these animals would not be right for him. Think how a praying mantis is invisible on a leaf, how they are carnivores who will devour their own species. The female will even eat her own partner once they've mated and, as hatchlings, their first meal is often one of their own siblings. These are the things that matter to Praying Mantis - and if you study his attributes, they are elements that will help you defeat him."

"The suffering and death I saw seemed to me in some meaningful respect lamentable—that is, unfortunate, regrettable, worthy of sadness, the kind of thing it would be better if the world did not involve. What can be said for such a response, and what against it? Can my lamentation be rationally defended as appropriate, or must it be viewed as nothing more than mawkish sentimentalism? How should we view the fact that some animals need to kill other animals in order to live? Can a world in which animals did not kill each other, and indeed did not need to do so in order to live, plausibly be called a better one?"

"Predators make it much more difficult to find consensus. It's a lot easier to agree about birds and plants than about animals that endanger people and livestock."

"The chief activities of beings, both human and non-human, are put forth, directly or indirectly, for the purpose of procuring food. The suppression, entire or partial, of one being by another for nutritive purposes is, therefore, the form of the most frequent and excessive egoism. The lowly forms of life—the worms, echinoderms, mollusks, and the like—are, for the most part, vegetarians. So, also, are prevalently the insects, birds, rodents, and ungulates. These creatures are not, as a rule, aggressively harmful to each other, chiefly indifferent. But upon these inoffensive races feed with remorseless maw the reptilia, the insectivora, and the carnivora. These being-eaters cause to the earth-world its bloodiest experiences. It is their nature (established organically by long selection, or, as in the case of man, acquired tentatively) to subsist, not on the kingdom of the plant, the natural and primal storehouse of animal energy, but on the skeletons and sensibilities of their neighbors and friends. The serpent dines on the sparrow and the sparrow ingulfs the gnat; the tiger slays the jungle-fowl and the coyote plunders the lamb; the seal subsists on fish and the ursus maritimus subsists on seal; the ant enslaves the aphidae and man eats and enslaves what can not get away from him. Life riots on life—tooth and talon, beak and paw. It is a sickening contemplation, But life everywhere, in its aspect of activity, is largely made up of the struggle by one being against another for existence—of the effort by one being to circumvent, subjugate, or destroy another, and of the counter effort to reciprocate or escape."

"It is easy to romanticise, say, tigers or lions and cats. We admire their magnificent beauty, strength and agility. But we would regard their notional human counterparts as wanton psychopaths of the worst kind."

"Predators merely remove surplus animals, ones that would succumb even in the absence of natural enemies. P.L. Errington exempts certain predator-prey relations from this scheme, however, and quotes the predation of wolves on deer as an example where predation probably is not related to the carrying capacity of the habitat."

"If there are any marks at all of special design in creation, one of the things most evidently designed is that a large proportion of all animals should pass their existence in tormenting and devouring other animals. They have been lavishly fitted out with the instruments necessary for that purpose; their strongest instincts impel them to it, and many of them seem to have been constructed incapable of supporting themselves by any other food. If a tenth part of the pains which have been expended in finding benevolent adaptations in all nature, had been employed in collecting evidence: to blacken the character of the Creator, what scope for comment would not have been found in the entire existence of the lower animals, divided, with scarcely an exception, into devourers and devoured, and a prey to a thousand ills from which they are denied the faculties necessary for protecting themselves! If were not obliged to believe the animal creation to be the work of a demon, it is because we need not suppose it to have been made by a Being of infinite power. But if imitation of the Creator's will as revealed in nature, were applied as a rule of action in this case, the most atrocious enormities of the worst men would be more than justified by the apparent intention of Providence that throughout all animated nature the strong should prey upon the weak."

"Why tinker with the plain truth that we hurry the darker races to their graves in order to take their land & its riches? Wolves don't sit in their caves, concocting crapulous theories of race to justify devouring a flock of sheep! "Intellectual courage"? True "intellectual courage" is to dispense with these fig leaves & admit all peoples are predatory, but White predators, with our deadly duet of disease dust & firearms, are examplars of predacity par excellence, & what of it?"

"'You didn't build that' will be Obama's political epitaph: With these remarks, Obama has come out of the closet as a most odious collectivist, who believes religiously that government predation is a condition for production Or, put simply, that the parasite created the host."