This study examined the differences in articular surface morphology of caudal vertebrae between prehensile and non-prehensile tailed primates. Articular surface is skeletal surface, which includes bone and cartilage, that makes contact with other skeletal surface as part of a joint. Variation in the morphology of articular surface can confer a greater capacity for mechanical loading, which is required for prehensile primates as they often use their tails to suspend their entire weight during locomotion. In this experiment, it was hypothesized that articular surface area and curvature in caudal vertebrae could be used to distinguish between prehensile and non-prehensile tails. The results showed that articular surfaces found in both proximal and distal regions were greater in prehensile tailed primates, in comparison to primates that were non-prehensile tailed. …show more content…
It was also determined that prehensile tailed platyrrhines had more pronounced and convex articular surface curvatures. Greater contour curvatures on intervertebral articular surfaces are associated with an increased range of flexibility and mobility of the caudal vertebrae, benefiting prehensile primates that use their tails in a variety of complex movements. Hence, through analyses of the morphology of caudal vertebrae, specifically their articular surface area and curvature, it was concluded prehensile and non-prehensile tails could be distinguished according to these structural features. Both of these characteristics relate to effective use of the tail during locomotion. This article is useful towards my GEM as it describes differences in bone structure of the tails of prehensile and non-prehensile primates, and explains the reasons that certain variations confer advantages to prehensile tail
Once the digital reconstruction was done the skull was compared with those of ancient and living primates in museums
The article I have chosen was written by Helen Pilcher and is about evolution of creatures, especially for primates. However, until now, what do our very first primates were like still remain mysterious as we do not have sufficient information and evidences which are 60 million years ago. Yet, we still cannot deny that evolution occurs in creatures. No matter for humans, animals or plants, all of them will make changes because of their living habits and environment in order to survive. In this article, the author explains everything clearly about the primate evolution was taken around million years ago and ancestors are a small and nocturnal creature.
howler monkeys live in south america in the tropical forest.the Howler monkey has a very deep howl. Threats to howler monkeys are human,predators,habitats being destroyed. What 's good about their habitat is that they have lots of leaves to eat in their habitat at the rainforest. Howler monkeys only howl when its the beginning of the day and the end of the day. They also eat nuts in the forest.
The primate observation that I chose to observe are Orangutan, Squirrel Monkey, and Lemur. This observation took place in the Lowry Park Zoo on October 18th. I went to the Lowry Park Zoo around 2 pm until 5 pm. The purpose of this observation is through primate’s anatomy, locomotion, and behavior to getting know them better, and how they are differences and similarities compare to human beings. When I got there, the Zoo was already very crowd.
In order to compare these anatomical differences, especially regarding tooth size and shape of skull, I will be looking into two hominids (and their skulls) in particular—Australopithecus Afarensis and Paranthropus Boisei. Under the category of Gracile Australopithecine, the Australopithecus Afarensis and the skull being used was from Ethiopia during the Pliocene epoch, roughly around 5.3-1.8 million years ago. As for the Paranthropus Boisei—under the category of Robust Australopithecine—this hominid and its skull was retrieved from Tanzania during the Pleistocene epoch, roughly 1.8 million-10,000 years
Climate change influenced nonhuman primate evolution by forcing the evolution of species and creating new environments that allowed for primates to live. "A rapid temperature increase around 55 mya ... led to an expansion of evergreen tropical forests, the environment that made possible many mammalian groups, including primates." (pg. 260). As rapid temperature increase created new environments a rapid cooling in the beginning of the Oligocene limited the range of habitats greatly. Due to this reduction a majority of the primates during this time lived around the fayum region in northeast Africa.
In Penang Island, there are two diurnal primate species, the long-tailed macaque (Macaca fascicularis) and the dusky leaf monkey (Trachypethicus obscurus). Both of these species are Old World Monkeys. The long-tailed macaque (Macaca fascicularis), which is also known as crab-eating macaque is widely distributed in tropical mainland and insular Southeast Asia (Fooden 1995), belongs to Cercopithecinae family. They can be found in a wide variety of habitats such as mangrove forests, primary and secondary forests, freshwater swamps, peat swamps. They can even be found in agriculture areas and villages that are near the forests, national parks, recreational parks, tourist attractions.
Through history there has been evidence to help support the claim that climate change has influenced the evolution of primates. Scientific evidence has proven that during certain climate spikes such as the swamp age, apes in the given territories that encompassed Africa led a migration to the Asia and Europe territories. The same climate changes that was responsible for the creation of the Swiss Alpes and other phenomena, has been associated with the adaptation, extinction, and migration. As weather changed in certain areas, the land became more dry making it harder to obtain and hunt food. Climate change, in theory, led to the extinction of the Sivapithecids apes because of the inability that the species has to obtaining food.
Near the junction between a single ancestral species branching off into two distinctive species, there will undoubtedly be large similarities between the two species. These similarities are expected to diminish over many generations as the two species become reproductively incompatible. However, If we consider the "grey area" that is the time between two strains of a species becoming reproductively distinct, we can why it is so advantageous for distinguishable facial features to arise; distinct facial features serve as a form of genetic authentication that allows identification of individuals with certain genes. These are the exact genotypic traits that must be propagated in a subset of the ancestral species for a budding new species to adapt to a new environment and/or escape the competition for resources from the original ancestral species by developing a niche. Hence, two characterizing features of primates with distinguishable facial features are genetic diversity and capacity for adaptive radiation.
Millions of years ago, primates developed in a wild post-dinosaur world and have revolutionized into the undomesticated mammals found in the subtropical regions of preset-day Africa, Asia, and South America. Primates are mammals that are characterized by having nails on the hands and feet, a short snout, flexible first digits, and a large brain. Almost all nonhuman primate species can be found in zoos all over the world. The condition of nonhuman primates in zoos are important because the mistreatment of animals is frowned upon in society and people belong to the primate order and share many characteristics with greater apes and other primates. The introduction of primates in zoos has led to advances in the health, lifespan, and animal
Primates Behind Bars: Introduction Zoos have been present in society as attraction sites for hundreds of decades. According to the World Association of Zoos and Aquariums, there are approximately 10,000-12,000 zoos and animal parks in the world. Zoos have numerous enclosures dedicated solely to one animal species, with primate exhibits being one of the most universally common among all zoos. Zoos are premises for the bondage of creatures, regularly in urban regions where huge numbers of the creatures would not overall be found, with the expectation of contemplating the creatures and showing them to people in general on the loose.
Climate change had a heavy influence on nonhuman primate evolution. Modern primates live in areas with a warmer climate where forests tend grow thickly, mainly in the southern hemisphere. However primates used to have a much more diverse habitat, living in more areas of the world than they do today. This is directly a result of climate change which has forced primates to change habitats. Climate change also occurred multiple times between the origins of early primates and modern day primates however.
Studying captive primates can help us learn not only how they behave, but also how they are similar or different to each other and humans as well as give us insight into the effects of captivity. This paper will be describing, comparing, and contrasting the behavior of two species of captive primates at the Alexandria Zoo, golden lion tamarins and howler monkeys, as well as discussing the possible effects captivity could have had on them. This paper will also discuss any human-like behaviors observed in the two primate species and what we as humans could learn about our own behavior by studying primates. The two primates I observed were 1 of 3 golden lion tamarins (Leontopithecus rosalia) all of unknown gender and a solitary female howler
The Howler Monkeys use their tail to help them grip onto branches as one tries to eat and move around the same in treetops. The tail of a howler monkey acts as a fifth limb for them, which is very ideal for their movement through the
BIOLOGY RESEARCH ESSAY There is great speculation around evolution. As we are continually in the process of discovering the history of human beings, there are many questions surrounding this topic. One very interesting question is why ancient ancestors of homo-sapiens evolved to walk upright like we do today. An apes’ DNA is astonishingly similar to that of a humans, (97% the same) and yet, our bones’ shapes and structure are very different.