"Backwardly wired retina an optimal structure"
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Jayjay4547 wrote:Spearthrower wrote:I’m not to be drawn on this “persistence hunter” notion.
Don't forget Sendraks - regardless of the topic of expertise, JJ always knows better than everyone. Forget such trivialities as doing a degree in the field, reviewing the evidence first-hand, using the data to support contentions.... just do it the JJ way; sit back in your lofty arm-chair and issue decrees.
Why don;t you climb down from your particular throne Spearthrower, and put in some data.
Sendraks wrote:
You’re not one to let facts and evidence stand in the way of a good story.
I understand.
Sendraks wrote:The fact that you seem to think it is, speaks volumes of the quality of your argument, which is based on trying to shoehorn reality into a mythology which serves your own ends, rather expand our understanding of the natural world.
Calilasseia wrote: in the meantime, over in Biological Sciences, some of us have been having some fun with a paper submitted to the journal Biology Direct, but released in draft form, complete with the peer reviewers' comments about that paper, which I bring here for a reason that should be pretty obvious once the details are presented. Those wishing to view the details can do so here, though I suspect many here will regard this as an example of "silly season" affecting some of the science journals.
The whole point of me alerting people to this thread, and the paper discussed therein, is because it provides us with a classic example of why JayJay's bollocks about "atheist ideology" IS bollocks. Because, wait for it, the premise of the paper in question, is exactly the sort of premise that would have JayJay screaming at 130 decibels about "atheist ideology", yet, the reviewers rejected the paper, and were frequently scathing in their critique thereof.
Calilasseia wrote: If JayJay's bollocks about "atheist ideology" pervading and corrupting science was something other than bollocks, this paper would have been rushed into print
Calilasseia wrote: If indeed it does turn out to be a duplicitous attempt to "Sokal" the journal by creationists, we'll all know who the real pedlars of "ideology" are, won't we boys and girls?
Jayjay4547 wrote:Calilasseia wrote: in the meantime, over in Biological Sciences, some of us have been having some fun with a paper submitted to the journal Biology Direct, but released in draft form, complete with the peer reviewers' comments about that paper, which I bring here for a reason that should be pretty obvious once the details are presented. Those wishing to view the details can do so here, though I suspect many here will regard this as an example of "silly season" affecting some of the science journals.
The whole point of me alerting people to this thread, and the paper discussed therein, is because it provides us with a classic example of why JayJay's bollocks about "atheist ideology" IS bollocks. Because, wait for it, the premise of the paper in question, is exactly the sort of premise that would have JayJay screaming at 130 decibels about "atheist ideology", yet, the reviewers rejected the paper, and were frequently scathing in their critique thereof.
I don’t think for a moment that that paper was intended for publication
Jayjay4547 wrote:it was a joke spoof using the language register of academic publications.
Jayjay4547 wrote:It had me intrigued for a minute; after all if a parasite can get an ant to go crazy in just such a way that it climbs a grass stalk, where a grazing antelope will eat it along with the grass to produce the next life stage of the parasite then gosh, maybe a parasite can mess with human heads as well. But then as I read towards the end of the text still nothing specific was being presented, and then the last sentence just blew it. This is another Piltdown Cricket Bat. The most amazing thing about it was that it was put out for review.
Jayjay4547 wrote:Calilasseia wrote: If JayJay's bollocks about "atheist ideology" pervading and corrupting science was something other than bollocks, this paper would have been rushed into print
No, it’s more likely though still improbable, that the editor would find out where the authors lived, get in his car, drive over and assault them.
Jayjay4547 wrote:Let me show you a real example of what ideological influence in a published article looks like.
Jayjay4547 wrote:Here is the introduction from Treves A and Palmqvist P Reconstructing Hominin Interactions with Mammalian Carivores (6.0-1;8Ma)in GurskyS L and Nekaris K A I Eds Primate anti-Predation Strategies , Springer
http://www.nelson.wisc.edu/people/treves/First%20author/Treves_Palmqvist_2007.pdf
"When considering hominin anti-predator behavior, many scholars looked first to material culture, such as fire or weaponry (Kortlandt, 1980; Brain, 1981). However, the idea that deterrent fire or weaponry freed early hominins from threats posed by predators is unsatisfying for several reasons. First, the modern carnivores now roaming Africa are survivors of humanity’s repeated and systematic campaigns to eradicate problem animals, trade in skins, and so on. (McDougal, 1987; Treves & Naughton-Treves, 999), whereas Pliocene carnivores would not have had a history of conflict with armed hominins. Second, thousands of modern humans fell prey to leopards (Panthera pardus), lions (P. leo) and tigers (P. tigris) in the twentieth century despite their sophisticated weapons and fire (Turnbull- Kemp, 1967; McDougal, 1987; Treves & Naughton-Treves, 1999; Peterhans & Gnoske, 2001). Although, thorn branches, stone tools, fire brands, pointed sticks, or bones could potentially help to repel carnivores from their kills (Kortlandt, 1980; Bunn & Ezzo, 1993; Treves & Naughton-Treves, 1999), such weaponry seems wholly inadequate for personal defense when large carnivores achieve surprise, attack in a pack, or are accustomed to overcoming heavier prey defended by horns, hooves, or canines. Therefore, we assert that weaponry by itself does not nullify the risk posed by predators. Moreover, controlled use of fire and stone tool technology appear late in the archaeological record relative to the evolution of semi-terrestrial hominins in Pliocene Africa (Bellomo, 1994; Brain, 1994;Wolde-Gabriel et al., 1994; Brunet et al., 1997;Leakey et al., 1998; Haile-Selassie, 2001). Hominin anti-predator behavior remains a key puzzle of our human ancestry.
Several hominin genera evolved to use savanna and woodland habitats across Pliocene Africa. This radiation into novel niches for apes occurred despite a daunting array of carnivores (Mammalia, Carnivora) between 6.0 and 1.8 Ma (Figure 17.1). Many of these carnivores would have preyed on hominins if given the opportunity. In this paper we ask what the behavioral adaptations were that permitted hominins to survive and spread, despite this potentially higher risk of predation in ancient Africa.
In the next section of this chapter we review African large carnivore ecology and hunting behavior in extant taxa and that reconstructed for Plio-Pleistocene forms
(“paleopredators” hereafter). Following this, we review the anti-predator behavior of hominins by analogy with monkeys and apes; this analogy is parsimonious because of the observed cross-taxonomic consistency of their behavioral responses to predators. Vigilance behavior in relation to social organization is particularly informative. Finally, we integrate the two reviews to reconstruct the range of antipredator behaviors open to hominins.
Jayjay4547 wrote:The place to look for ideology is near the start of the text, where the reader is being shown what to look at, and what not.
Jayjay4547 wrote:Typically, that focus isn’t the outcome of a to-and-fro debate
Jayjay4547 wrote:the authors present an argument that they don’t expect will be controversial.
Jayjay4547 wrote:The correct focus may be presented as more modern, as if scientists by consensus abandoned one position and moved towards another.
Jayjay4547 wrote: See this extract:
"When considering hominin anti-predator behavior, many scholars looked first to material culture, such as fire or weaponry (Kortlandt, 1980; Brain, 1981). However, the idea that deterrent fire or weaponry freed early hominins from threats posed by predators is unsatisfying for several reasons".
The Brain citation is to his “The Hunter or the Hunted?” that presents the case for the opposite of australopiths being freed from threats posed by predators.
Jayjay4547 wrote:Much of his life’s work has been to show that they were predated. Earlier I linked to his famous Kranskop finding of a hominid skull with dents matching the canines of a leopard skull from the same location. It would be as implausible to claim that weapon use “freed” hominins from predation threats, as to claim that the fleet hooves of impala freed them from predation.
Jayjay4547 wrote:Not that Brain focused on weapon use anyway, as Dart had earlier.
Jayjay4547 wrote:Having set up a false premise: that in the old days, scientists had believed that hominins were not predated
Jayjay4547 wrote:the authors then demolish the notion that that “weaponry by itself does … nullify the risk posed by predators.”
Jayjay4547 wrote:What exactly could “weaponry by itself” mean? A weapon just lying there on the ground? A weapon applied without tactic? A weapon held by disorganized hominins in Brownian motion?
Jayjay4547 wrote:What the authors actually mean is, don’t let’s look at weaponry, let’s focus on social organization by analogy with the practices of other primates.
Jayjay4547 wrote:The arguments used to assert this point should be pleasing to most readers here:
Moreover, controlled use of fire and stone tool technology appear late in the archaeological record relative to the evolution of semi-terrestrial hominins in Pliocene Africa (Bellomo, 1994; Brain, 1994;Wolde-Gabriel et al., 1994; Brunet et al., 1997; Leakey et al., 1998; Haile-Selassie, 2001).
Jayjay4547 wrote:It’s an assertion with two assumptions:
Jayjay4547 wrote:first that the carnivores didn’t impose conflict on the hominins
Several hominin genera evolved to use savanna and woodland habitats across Pliocene Africa. This radiation into novel niches for apes occurred despite a daunting array of carnivores (Mammalia, Carnivora) between 6.0 and 1.8 Ma (Figure 17.1). Many of these carnivores would have preyed on hominins if given the opportunity. In this paper we ask what the behavioral adaptations were that permitted hominins to survive and spread, despite this potentially higher risk of predation in ancient Africa.
Large carnivore diversity was greater in Africa’s past than it is today (Figure 17.1). Between 6 and 3.6 Ma there were five genera of large carnivores without
extant analogues (the long-legged ursid Agriotherium, the large coursing hyaenid Chasmaporthetes, and the saber-toothed felids Homotherium, Machairodus and Dinofelis). Then, from the mid-Pliocene (3.6 Ma), the archaic genera were joined by one large canid (Lycaon lycaonoides) (Martínez-Navarro & Rook, 2003), three new large felid genera (Acinonyx, Megantereon and Panthera), and four new genera of hyaenids (Crocuta, Pachycrocuta, Hyaena, and Parahyaena). At some sites, 8–10 species appear to have been coeval and broadly sympatric (Barry, 1987; Turner & Anton, 1997)(Figure 17.1). Niche separation under such conditions is not yet clear.
Coexistence of hominins and carnivores is insufficient by itself to conclude that hominins evolved effective anti-predator defenses against such paleopredators. Coexistence would have had little selective impact if (a) carnivores did not kill Pliocene hominins regularly, or (b) if such predation were random with respect to hominin traits. Thus, in the following sections we assess whether paleopredators killed hominins regularly, and if so, were there consistent patterns of hominin-carnivore interactions that might have produced directional selection among hominins.
Jayjay4547 wrote:and secondly, that hominins didn’t react aggressively to predation on then.
Anti-Predator Behavior and Hominin Reconstruction
We divide anti-predator behavior into two discrete strategies that correspond to different stages in a predator encounter. In the first stage we place all behavioral tactics displayed in the absence of predators, behaviors aimed at reducing the likelihood of encounter. The primary tactics of stage one are inconspicuousness, avoidance of dangerous locations, and vigilance oriented to early detection of a predator. The second stage begins when predators are encountered. The corresponding anti-predator behaviors will reflect the immediacy of the threat, although the exact steps and sequence will vary with the type of predator, type of primate prey, cost-benefit ratio of prey responses, and with the physical context (Ydenberg & Dill, 1986; Lima, 1993; Treves, 2002). The primary tactics in stage two are monitoring of predators, escape, deterrence, and hiding among other targets (selfish herd). Each tactic has requirements that make the tactic useful in some situations but not in others. Because anti-predator behavior has been studied for decades we refer the reader to more general reviews (Edmunds, 1974; Klump & Shalter, 1984; Cheney & Seyfarth, 1990; Lima, 1990; Goodman et al., 1993; Treves, 1999a; Boinski et al., 2000; Miller & Treves, 2006), but we cite primary sources for anti-predator behavior of living hominoids.
In the Absence of Predators
Primates reduce the likelihood of encounter with predators by avoiding dangerous areas, behaving inconspicuously, or surveying their physical surroundings for danger. Avoidance of known dangerous areas is probably universal among primates, but the role of learned versus innate avoidance is unclear. As a result, we know little about how primates respond to changes in predator communities or changes in their encounters with carnivores—issues of importance when we consider hominin-carnivore interactions. Inconspicuousness depends on small group size or coordination of activities among associates. The larger a group, the more sounds, smells, and other signs that may be detectable to predators.
Apes often rely on inconspicuousness and avoidance of risky areas, especially after they encounter a predator. For example, chimpanzees (Pan troglodytes) in Senegal were more silent than usual when they were crossing broad grassland, ostensibly to avoid detection by the abundant large carnivores (Tutin et al., 1981). Lowland gorillas (Gorilla gorilla) moved quickly and quietly after encountering a leopard (Fay et al., 1995). Aché hunter-gatherers (Homo sapiens) moved camp to avoid a jaguar (Hill & Hurtado, 1995), and Indian villagers stayed in their settlements after tigers and leopards attacked some villagers who had gone into the forest (Corbett, 1954). Early hominins would likely have avoided areas such as dark caves, treeless habitat, high grass, and rocky outcrops, at least until these areas had been thoroughly surveyed for danger. It would seem conspicuous behaviors (tool-making, loud display, mating, play, etc.) would have been most safely performed high in trees or on rock ledges. However, hominin tool making appears to have occurred at lacustrine and riverine edges (Bunn & Ezzo 1993; Capaldo 1997; Dominguez-Rodrigo & Pickering, 2003; Palmqvist et al., 2005); the risk at such sites remains to be determined.
Surveillance of surroundings also seems universal among primates. Visual and auditory monitoring may forewarn primates of impending encounters with predators and help the primates respond appropriately. Vigilance reduces uncertainty about a given location but uncertainty resurfaces after individuals leave an area or otherwise interrupt monitoring, hence vigilance must be continuously renewed.
Vision is particularly useful in providing precise information about predator type, location, and movement. Auditory vigilance can complement visual monitoring, especially in visually obstructed microsites.
Non-primates who keep their heads down suffer higher predation rates than those who survey their environment (FitzGibbon, 1989). Equivalent data are not yet available for wild primates, but they do spend more time scanning their surroundings when risk is elevated (Treves, 2000).We have little quantitative data on vigilance in apes or humans, but the few data resemble those of monkeys (Wirtz & Wawra, 1986; Setiawan et al., 1996; Treves, 1997; Watts, 1998). Locational features, such as the density of foliage and associates, will modify the effectiveness of visual vigilance and, presumably, auditory vigilance as well (e.g., running water or noises produced by non-predators). Visual obstructions were associated with less time spent vigilant in two studies (Hill & Cowlishaw, 2002; Treves, 2002). Therefore, hominins using Pliocene African savanna-woodlands might have invested more in visual vigilance than those in closed, forested habitats. We discuss vigilance further below as it is intricately tied to social organization.
After Predator Encounter
Once potential prey animals have been detected by a predator, their particular anti-predator response will depend on their detecting the predator in turn and on its hunting tactics. At one extreme predators may remain undetected throughout the attack sequence. Nocturnal predation tends toward this extreme (Busse, 1980; Peetz et al., 1992; Wright, 1998), as does predation with complete surprise (Chapman, 1986; Peres, 1990). Attack by complete surprise followed by death leaves prey with only one recourse: to practice safety in numbers. We discuss aggregation further in “Trade-Offs Between Anti-Predator Aggregation and Vigilance” below.
If a predator is detected before it kills its prey, primates display several effective anti-predator tactics. Many individuals will produce alarm calls to warn associates some protect themselves without warning others. When primates have detected a predator they may produce predator warnings to deter further approach by that predator (Zuberb¨uhler, 2000). Mobbing calls are used to attract attention to a predator or intimidate it. Chimpanzees and humans give alarm and mobbing calls (Corbett, 1954; Goodall, 1986; Hiraiwa-Hasegawa et al., 1986; Boesch, 1991; Tsukahara, 1993). Hominins would presumably have done the same.
In addition, all primates escape. We have found no convincing descriptions of primates using the “confusion effect” (i.e., escape not in a direct line to refuge, but in coordinated, evasive action confusing to the observer), to avoid predation, the kind of effect that is seen in some fish or open-country herds of ungulates (Edmunds, 1974). Moreover, primates virtually always flee to refuge rather than try to outdistance their attackers. Refuges for terrestrial primates include some trees and cliffs, while arboreal primate forms rapidly change levels. Humans and apes also commonly flee from predators and use refuges such as trees (Corbett, 1954; Boesch, 1991; Tsukahara, 1993; Hill & Hurtado, 1995). Presumably, early hominins would have minimized forays away from refuge and maintained proximity to trees and cliff sides to improve their chances of escape from speedy predators.
More rarely, primates stand their ground to counterattack or mob predators. Of the two forms, mobbing appears to be less dangerous for the predator and is more common among primates much smaller than the predator. Mobbing involves two or more prey animals making repeated advances on a predator, usually while vocalizing and displaying in a conspicuous fashion. The predator is often distracted or repelled by persistent approaches. Adult males, acting alone or in small parties, are more likely to attack predators than other classes of individuals (Gautier-Hion & Tutin, 1988; Cowlishaw, 1994). Baboon counterattacks have been described most often. Sometimes adult male baboons coordinate a counterattack on a leopard or cheetah and may deliver serious injuries (Brain, 1981; Bailey, 1993; Cowlishaw, 1994), but at other times the males flee the scene (Smuts, 1985). The likelihood of counterattack by primates appears to depend on the size difference between predator and prey.
Silverback gorillas sometimes defend their groups from predators and hostile conspecifics by using intimidation displays. Chimpanzees have pursued and even killed cornered leopards (Boesch & Boesch, 1981; Hiraiwa-Hasegawa et al., 1986). Chimpanzees have attacked stuffed leopard models with sticks and stones (Kortlandt, 1980, 1989). However, healthy lioness-sized or larger carnivores may be too formidable, even for male apes in groups (Tsukahara, 1993). Counterattack with hand weapons may be an especially effective anti-predator tactic in some situations, but we have very little systematic evidence of this. It is doubtful that simple projectiles can deter coursing predators that do not abort pursuit easily or packs of carnivores emboldened by their own numbers. Moreover, a weapon does not provide protection if its wielder is surprised. Therefore, we doubt that hominins counterattacked carnivores in packs or lion-sized carnivores in the Pliocene.
Jayjay4547 wrote: The notion of a “history” is also problematic for modeling predator-prey relations; the hominins and predators coexisted for millions of years.
Jayjay4547 wrote:"Second, thousands of modern humans fell prey to leopards (Panthera pardus), lions (P. leo) and tigers (P. tigris) in the twentieth century despite their sophisticated weapons and fire (Turnbull- Kemp, 1967; McDougal, 1987; Treves & Naughton-Treves, 1999; Peterhans & Gnoske, 2001)".
Modern people do occasionally get eaten but generally, not those with sophisticated weapons in their hands. Wikipedia entry on Tiger attack has this quote by hunter Kenneth Anderson:
"It is extraordinary how very cautious every man-eater becomes by practice, whether a tiger or panther, and cowardly too. Invariably, it will only attack a solitary person, and that too, after prolonged and painstaking stalking, having assured itself that no other human being is in the immediate vicinity... These animals seem also to possess an astute sixth sense and be able to differentiate between an unarmed human being and an armed man deliberately pursuing them, for in most cases, only when cornered will they venture to attack the latter, while they go out of their way to stalk and attack the unarmed man.
Jayjay4547 wrote:To continue with the Treves and Palmqvist paragraph:
"Although, thorn branches, stone tools, fire brands, pointed sticks, or bones could potentially help to repel carnivores from their kills (Kortlandt, 1980; Bunn & Ezzo, 1993; Treves & Naughton-Treves, 1999), such weaponry seems wholly inadequate for personal defense when large carnivores achieve surprise, attack in a pack, or are accustomed to overcoming heavier prey defended by horns, hooves, or canines."
These citations apparently refer to the notion that instead of hunting themselves, hominins waited for predators to do that and then drove the predators away. That strategy is widely used amongst mammals and birds, it is achieved by superior threat but it’s not obviously clear that a primate that can drive predators away could not also defend itself from attack. Chimps and baboons both react aggressively to attacks in “personal defense” but neither are known to try to drive predators from their prey.
Jayjay4547 wrote:So what I’m claiming is that this one paragraph makes a number of points that could be taken up in opposition and that aren’t supported by data.
Jayjay4547 wrote:That in a generally highly authoritative article (actually a book chapter). I’d be surprised if you didn’t accept Treves and Palmqvist’s position
Jayjay4547 wrote:but what does it have to do with ideology? Part is aimed to depict human evolution through similarity with other primate activity, rather than through what might have been distinctive about human ancestry.
Jayjay4547 wrote: If one focuses on distinction that feeds the notion of human uniqueness, which is fully expressed in the Genesis narrative.
Jayjay4547 wrote:Then it looks as though there is something special about humans. Even though defensive weapon use isn’t widely thought of as what makes us “human”.
Jayjay4547 wrote:The more human evolution can be described through similarity with other primates rather than distinction, the more it is attributed to the “theory of evolution” rather than to a particular historical path, a bit like the relatively theory-free discipline of historical narrative.
Jayjay4547 wrote:If one considered the australopith body plan as suggesting adaption into defensive weapon use for antipredation, that would encourage statements of agency by outside. For example, “Lions created the australopiths in the image they would least like to see in a terrestrial primate”. or “River stones made the australopiths”.
Jayjay4547 wrote:On the other hand if one just focuses on the australopiths as a probably social genus, then the explanation or at least discussion of it, is internal to the troop. The story of human evolution then becomes a story of self-invention.
Jayjay4547 wrote:Calilasseia wrote: If indeed it does turn out to be a duplicitous attempt to "Sokal" the journal by creationists, we'll all know who the real pedlars of "ideology" are, won't we boys and girls?
Possible, but more likely this confection was made by atheists for the purpose it was actually used for, to give a bunch of atheists an opportunity for delighted self-congratulation.
Animavore wrote:Thinking about it, I'm not even sure what the link between atheism and Natural Selection is even supposed to be. Is it because Dawkins just happens to be an evolutionary biologist that people are making this link?
...
DavidMcC wrote:Animavore wrote:Thinking about it, I'm not even sure what the link between atheism and Natural Selection is even supposed to be. Is it because Dawkins just happens to be an evolutionary biologist that people are making this link?
...
There is no link. Atheism simply allows clearer thinking about the science of evolution by natural selection. That's all.
Animavore wrote:DavidMcC wrote:Animavore wrote:Thinking about it, I'm not even sure what the link between atheism and Natural Selection is even supposed to be. Is it because Dawkins just happens to be an evolutionary biologist that people are making this link?
...
There is no link. Atheism simply allows clearer thinking about the science of evolution by natural selection. That's all.
I don't see how. Any religious person who is non-literal about their creation myths can think on the issue just as clearly.
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