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Blackpill Male intrasexual competition

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Deleted member 31949

Deleted member 31949

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Male-male competition occurs when two males of the same species compete for the opportunity to mate with a female. Sexually dimorphic traits, size, sex ratio,[1] and the social situation[2] may all play a role in the effects male-male competition has on the reproductive success of a male and the mate choice of a female. Larger males tend to win male-male conflicts due to their sheer strength and ability to ward off other males from taking over their females. For instance, in the fly Dryomyza anilis, size shows the strongest correlation to the outcome of male-male conflicts over resources like territory and females.[3]

Influencing factors​

Sex ratio​

There are multiple types of male-male competition that may occur in a population at different times depending on the conditions. Competition variation occurs based on the frequency of various mating behaviours present in the population.[1] One factor that can influence the type of competition observed is the population density of males.[1] When there is a high density of males present in the population, competition tends to be less aggressive and therefore sneak tactics and disruptions techniques are more often employed.[1] These techniques often indicate a type of competition referred to as scramble competition.[1] In Japanese medaka, Oryzias latipes, sneaking behaviours refer to when a male interrupts a mating pair during copulation by grasping on to either the male or the female and releasing their own sperm in the hopes of being the one to fertilize the female.[1] Disruption is a technique which involves one male bumping the male that is copulating with the female away just before his sperm is released and the eggs are fertilized.[1]

However, all techniques are not equally successful when in competition for reproductive success. Disruption results in a shorter copulation period and can therefore disrupt the fertilization of the eggs by the sperm, which frequently results in lower rates of fertilization and smaller clutch size.[1]

Resource value and social ranking​

Another factor that can influence male-male competition is the value of the resource to competitors. Male-male competition can pose many risks to a male's fitness, such as high energy expenditure, physical injury, lower sperm quality and lost paternity.[4] The risk of competition must therefore be worth the value of the resource. A male is more likely to engage in competition for a resource that improves their reproductive success if the resource value is higher. While male-male competition can occur in the presence or absence of a female, competition occurs more frequently in the presence of a female.[2] The presence of a female directly increases the resource value of a territory or shelter and so the males are more likely to accept the risk of competition when a female is present.[2] The smaller males of a species are also more likely to engage in competition with larger males in the presence of a female.[2] Due to the higher level of risk for subordinate males, they tend to engage in competition less frequently than larger, more dominant males and therefore breed less frequently than dominant males.[4] This is seen in many species, such as the Omei treefrog, Rhacophorus omeimontis, where larger males obtain more mating opportunities and mate with larger females.[5]

Winner–loser effects​

A third factor that can impact the success of a male in competition is winner-loser effects.[6] Burrowing crickets, Velarifictorus aspersus, compete for burrows to attract females using their large mandibles for fighting.[6] Female burrowing crickets are more likely to choose winner of a competition in the 2 hours after the fight.[6] The presence of a winning male suppresses mating behaviours of the losing males because the winning male tends to produce more frequent and enhanced mating calls in this period of time.[6]

Effect on female fitness​

Male-male competition can both positively and negatively affect female fitness. When there is a high density of males in a population and a large number of males attempting to mate with the female, she is more likely to resist mating attempts, resulting in lower fertilization rates.[1] High levels of male-male competition can also result in a reduction in female investment in mating.[3] Many forms of competition can also cause significant distress for the female negatively impacting her ability to reproduce.[1] An increase in male-male competition can affect a females ability to select the best mates, and therefore decrease the likelihood of successful reproduction.[7]

However, group mating in Japanese medaka has been shown to positively affect the fitness of females due to an increase in genetic variation, a higher likelihood of paternal care and a higher likelihood of successful fertilization.[1]

References​


Citations​

  1. Weir, Laura K. (2012-11-22). "Male–male competition and alternative male mating tactics influence female behavior and fertility in Japanese medaka (Oryzias latipes)". Behavioral Ecology and Sociobiology. 67 (2): 193–203. doi:10.1007/s00265-012-1438-9. ISSN 0340-5443. S2CID 15410498.
  2. Proctor, D. S.; Moore, A. J.; Miller, C. W. (2012-03-09). "The form of sexual selection arising from male-male competition depends on the presence of females in the social environment". Journal of Evolutionary Biology. 25 (5): 803–812. doi:10.1111/j.1420-9101.2012.02485.x. ISSN 1010-061X. PMID 22404372. S2CID 594384.
  3. Otronen, Merja (1984-08-01). "Male contesis for territories and females in the fly Dryomyza Anilis". Animal Behaviour. 32 (3): 891–898. doi:10.1016/S0003-3472(84)80167-0. ISSN 0003-3472. S2CID 53188298.
  4. Nelson-Flower, Martha J.; Ridley, Amanda R. (2015-09-24). "Male-male competition is not costly to dominant males in a cooperatively breeding bird". Behavioral Ecology and Sociobiology. 69 (12): 1997–2004. doi:10.1007/s00265-015-2011-0. ISSN 0340-5443. S2CID 15032582.
  5. Luo, Zhenhua; Li, Chenliang; Wang, Hui; Shen, Hang; Zhao, Mian; Gu, Qi; Liao, Chunlin; Gu, Zhirong; Wu, Hua (2016-02-23). "Male-male competition drives sexual selection and group spawning in the Omei treefrog, Rhacophorus omeimontis". Behavioral Ecology and Sociobiology. 70 (4): 593–605. doi:10.1007/s00265-016-2078-2. ISSN 0340-5443. S2CID 13912038.
  6. Zeng, Yang; Zhou, Feng-Hao; Zhu, Dao-Hong (2018-06-26). "Fight outcome briefly affects the reproductive fitness of male crickets". Scientific Reports. 8 (1): 9695. Bibcode:2018NatSR...8.9695Z. doi:10.1038/s41598-018-27866-4. ISSN 2045-2322. PMC 6018733. PMID 29946077.
  7. Cayuela, Hugo; Lengagne, Thierry; Kaufmann, Bernard; Joly, Pierre; Léna, Jean-Paul (2016-06-24). "Larval competition risk shapes male–male competition and mating behavior in an anuran". Behavioral Ecology. 27 (6): arw100. doi:10.1093/beheco/arw100. ISSN 1045-2249.
Copied and adjusted from Wikipedia
 
Copied and adjusted from Wikipedia
Neuron Star IQ — what’s funny is this is exactly what happens FOR HUMANS but women and bluepilled men deny it even when the evidence clearly demonstrates that this is reality.

I swear 97% of people refuse to acknowledge anything that doesn’t benefit them or that could paint them in a bad light. So tiring how people are so biased and irrational due to them just being selfish and wanting to keep the status queue since they do well off of it.

It’s the hypocrisy and double standards that drive me up a wall. In the western world today men clearly have it worse, and much worse, if you follow dating/sex/relationships studies and even if you follow university/education/work place studies in recent years (where young men are falling behind and women are given higher scores for the exact same work — this was one of the recent data sets discussed over on MRA along with how young women are now out earning their mirrors).

But yeah I’m getting off topic ... good post OP, definitely an accurate observation of what’s going on in the human population even if foids refuse to acknowledge it.
 
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Neuron Star IQ — what’s funny is this is exactly what happens FOR HUMANS but women and bluepilled men deny it even when the evidence clearly demonstrates that this is reality.

I swear 97% of people refuse to acknowledge anything that doesn’t benefit them or that could paint them in a bad light. So tiring how people are so biased and irrational due to them just being selfish and wanting to keep the status queue since they do well off of it.
Because it is a harsh truth and difficult to accept. Think about it. The human being doesen't care who you are but what and how you are. You should be your personality because it makes more sense to be your personality than to be your appearence and mental health. Sadly, the world doesen't work that way. Your personality is under your control while your appearence and mental health is out of your control. And these 2 factors are the most important aspects in natural selection. You are your appearence and not your personality. That's why there are many bluepilled people. Because it's difficult to accept that you have nothing under your control. Because everything is predetermined by a causal domino effect.
 
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Because it is a harsh truth and difficult to accept. Think about it. The human being doesen't care who you are but what and how you are. You should be your personality because it makes more sense to be your personality than to be your appearence and mental health. Sadly, the world doesen't work that way. Your personality is under your control while your appearence and mental health is out of your control. And these 2 factors are the most important aspects in natural selection. You are your appearence and not your personality. That's why there are many bluepilled people. Because it's difficult to accept that you have nothing under your control. Because everything is predetermined by a causal domino effect.
Well put mate
 

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