Introduction Group behaviour, also known as gregarious behaviour, occurs in a wide variety of animals including, but not limited to, invertebrates (Ritz, 1994), fish (Shaw, 1970), birds (Lack, 1968), wildebeests (Gueron and Levin, 1993), lions (Bertram, 1975), and primates (Nakagawa, 1990). Benefits of group living include improved reproductive success, increased foraging success, and improved predation survival (Hamilton, 1971; Reluga and Viscido, 2005). Social behaviours evolve when the benefits of group living outweigh the costs (Fleagle, 2013). Predation risk is lowered in social groups by confusing the predator so the predator’s success decreases (Hall et al., 1986; Smith and Warburton, 1992), by providing improved vigilance – more …show more content…
Group living in animals can be an act of selfish behavior, one of the reasons being the reduced risk of predation (Morrell and James, 2008). Species that show this behaviour include sticklebacks (Krause and Tegeder, 1994), banded killifish (Hoare et al., 2004), toad tadpoles (Watt et al., 1997; Spieler and Linsenmair, 1999) and ocean skaters (Foster and Treherne, 1981). By keeping close to others and forming a group, an animal can benefit from collective vigilance, predator confusion, and the dilution risk, all which reduce the chance of predation to that individual (Morrell and James, 2008; Krause and Ruxton, 2002). Selfish herd theory The selfish herd theory was developed by Hamilton and is widely excepted as a explanation for the selfish grouping of animals (Morrell and James, 2008). The Selfish herd theory states that individuals within a population attempt to reduce their predation risk by putting other individuals between themselves and predators resulting in groups of animals (Hamilton, 1971). Hamilton’s proposed theory contrasted the hypothesis that evolution of such social behaviour was based on mutual benefits to the population (Hamilton, 1971). An animal may join a group for its own selfish reasons, seeking to push the risk of being a victim of predation onto other members (Breed and Moore, 2011). In groups, predation risk is greatest on the outside edge and lower towards the
The lecturer reexamines the altruism behavior stated in the paragraph by more closerly examining the meerkats behaviour.
A chimp named Judy was given a box to solve that consisted of a wheel that must be turned to drop the treat, and then a lever to be pushed that would open the door. She figured it out quite quickly, but what was interesting was that other types of apes in nearby cages learned how to do it by watching Judy and her cage mates. Social species also need to be able to cooperate to a certain extent to make themselves and others better off. Apes possess some cooperative skills, but they still come up far short of humans. Several reasons for this limit on cooperation are emotional issues, rivalry, violence, and impulsiveness. In an experiment where two apes were placed together in adjacent cages, one ape had two pieces of rope connected to a board with food on it. To obtain the food, both pieces of rope had to be pulled at the same time, but that required the help of another ape. One chimp realized he needed help and opened the door of the cage to let the other chimp in. Together, they pulled the board to the cage and received their treat. What the experimenters found was that the helper needed to be a friend and that the food must be in separate dishes for this to occur. However, bonobos, being incredibly social apes, were able to pull it together and eat out of one singular dish. This means that somewhere along the phylogeny of hominid evolution, humans were able to continue selection for the
The concept of dominance in an ethological context is defined by the Merck Veterinary Journal as “competitive control over a resource in a limited circumstance and to the ability of a higher-ranking animal to displace a lower-ranking one from that resource.” However an animal’s relationship with another cannot be called dominant unless one consistently displays submissive behavior. (Landsburg, “Glossary of Behavioral Terms”) The concept of a “dominance hierarchy” is defined by Encyclopedia Britannica as “a form of animal social structure in which a linear or nearly linear ranking exists, with each animal dominant over those below it and submissive to those above it in the hierarchy.” Typically a social hierarchy is not established unless there is competition for resources. For social animals, who live in groups, establishing a hierarchy is often beneficial and spares energy because instead of fully battling for a resource, the animals can follow the order and avoid confrontation. Among most creatures, the establishing of rank is often achieved through what amounts to posturing, such
Humans act as a strong evolutionary force that can cause more rapid selection than predators or the environment. Past research has concentrated on human selection of morphological traits , but little is known about the human influence on behaviors in wild populations. To see how human hunting effects elk anti-predator behavior, researchers tracked elk movement over four years. Researchers predicted that fast moving, bold elk were more likely to be harvested than shy, slow elk. In Alberta, Canada, researchers attached GPS collars to 45 two-year-old bulls and 77 cows ranging from 2 to 19 years old. They recorded elk location every 2 hours and used distance travelled to infer step length. Elk that spent time in open areas, near roads, and smooth
Chimpanzees (Figure 1) are the closest living relatives to us, and they share 99 percent of our DNA (1). Chimpanzees have distinct group territoriality. Male chimpanzees “patrol” near the boundary between the two ranges, at that time they move very carefully and quietly, and they can cease to listen and observe the range of their neighbors. Patrolling individuals are likely to face cruel and violent
Predatory selection demonstrated heavily on how the predators prefered brighter males and how females then resorted to whatever was left. From my data of mostly drab and mostly bright guppies with the simulation having 30 rivulus, 30 acara, and 30 cichlids, I could see a clear trend. For the mostly drab guppies, in a mere 7 generations or 141 weeks, showed that the predators had wiped out the brighter guppies having a split demographic of 0% of the brightest and bright guppies, 30% for drab guppies and 70% for the drabbest of guppies. In the mostly bright guppy test, it was more even but showed an obvious lean towards the drabber guppies having 20% and 17% for brightest and bright guppies, and 17% and 46% for the drab and drabbest guppies respectively. With all this data, the trend leaned towards having the bright guppies
Communal nesting is beneficial for the public good. They found you get thermal buffering with nests. Their team put thermal loggers in the nest to see what ambient heat would be in the nest. In Central Namibia they set up two sites. Mist nets were used to capture individuals to take blood, put leg bands on, and take morphological measurements. They measured cooperation of individuals which was the amount of items they brought to the nest. Aggression was measured also, which counted as individuals who chased each other off. In addition, they measured the amount of items brought to individual nesting chambers. Blood was used to calculate relatedness by genotype by sequencing. This allowed them to calculate population genetics and estimate relatedness. They predicted that individuals would modify their behavior depending how related they were to the colony. Punishment was analyzed also.
Ernest Hemmingway once said, “There is nothing to writing. All you do is sit at a typewriter and bleed” (BrainyQuote, 1). Harlem Renaissance author and poet Langston Hughes embodied this statement to the fullest extent, using his personal emotions, experiences, and his “blood” to enhance the depth of his writing. Hughes added his personal experiences and emotions into his writing, such as his estranged relationship with his father, his frustration with racial prejudice, and his alleged homosexuality.
The majority of organisms that fall into the category of primates tend to live in relatively large group size and work together within their habitats to increase the overall survival rate. There are multiple benefits of living in larger groups which include increased genetic diversity, increased protection from predators and even more opportunity for developing learning strategies [7]. On the other hand, animals living in smaller groups do not necessarily have as much completion for resources or
Primatology gives us a look into how our human nature works with social, violent, and peaceful situations. For years, it has always been that we are not similar to primates, and are the only species with beyond unique characteristics. Recently, studies have shown otherwise, while different species of primates are advancing and becoming closer to us than we’d like to think. Even with how violent our human tendencies can get, we still maintain a good balance of peace in our world. Going back to what we previously talked about in class, cooperation is not just about maintaining peace but about a more efficient way to exterminate dangers outside of the group. Along with cooperation comes the way we resolve conflicts to maintain peace with those
Elsey and Woodward (2010) state that they have a high complexity of social behavior that includes vocal and visual communication. Vocalization includes bellows and head slaps. Visual includes complex body postures. It is described in Mattison (2015) that they will also form social groupings while basking, but are mostly solitary.
Chapter 12 social psychology cover how we affect one another’s behaviors. Culture, stereotypes, prejudice, discrimination attitude, and interpersonal attraction are all factors that contribute to behavior in a social setting. Understanding how we influence one another on a social level forces us to look at not only ourselves, but also look at how others affect the world we live in and why it is important to be able to identify these influences and the impact they have on our behaviors good or bad
In social psychology, social influence is a process where someone’s beliefs, thoughts and behaviour change by being exposed to beliefs, thoughts and opinions of others. It manifests in several forms, such as obedience, compliance and conformity. All these types of social influence have been studied by numerous researchers who investigated the reasons why people conform to social norms and obey to authorities, such as Milgram’s classic studies on obedience. His experiments support the popular idea of ‘banality of evil’ –Hannah Arendt (1963)’s famous phrase referring to the capability to accomplish dreadful things out of banal reasons–, revealing that people conform submissively and thoughtlessly to the orders that authorities deliver, no
Genesis 12:1 is one of the most powerful verses in Genesis. The Bible shows us a man, a man that a huge, life changing choice in front of him. Abram had a life and a family, he settled down in the land of Harran. One day the lord of lords, Elohim himself established a enormous calling and purpose over his life. God told Abram to leave his home, his family, and everything he had known to follow him. God wanted Abram to focus on the journey not the destination. Many times in our life for the purpose of God to be fulfilled in our life we bust leave everything we know. We most go to the land that God will show us. Like Abram we will not know the land but we will know our calling. This verse is about faith, faith in the unknown. We must learn to have complete faith in God, even if our human eyes show us the oposite of our promise, even if God's promise seem impossible. We must understand that he is the God of the impossible, the one that can make all new.
Leadership and organizational behavior are essential in any organization. In order to achieve goals and high performance, the two must work hand in hand. There are many types of leadership theories following different characteristics in order to create an effective organization. First, the most important item to address is the function of leadership. The next aspect is how organizational behavior relates to leadership. Last, is determining which theory has the characteristics to be particularly effective in both.