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Post by Gorilla king on Mar 22, 2022 13:17:13 GMT -5
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Post by oldindigosilverback on Jul 1, 2022 6:01:07 GMT -5
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Post by oldindigosilverback on Jul 1, 2022 6:11:35 GMT -5
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Post by Gorilla king on Jul 1, 2022 7:51:04 GMT -5
Reply #22:
Great video. When sticks are thrown at each other is very funny.
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Post by Gorilla king on Jan 19, 2023 9:07:54 GMT -5
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Post by Gorilla king on Feb 27, 2023 9:23:46 GMT -5
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Post by Gorilla king on May 21, 2023 10:01:12 GMT -5
MORPHOFUNCTIONAL CHARACTERISTICS OF THE LOWER HINDLIMB AND FOOT MUSCLES OF BORNEAN ORANGUTAN (Pongo pygmaeus)
Abstract and Figures
Orangutan is a great ape that has anatomical and physiological aspects similar to those of gorillas and chimpanzees, although orangutan is more arboreal than other great apes. This research aims to study the morphofunctional characteristics of the lower hindlimb and foot muscles of Bornean orangutan and its relation to the type of locomotion and daily behavior. This research was conducted on the right leg of a male orangutan by observing the morphology of the lower hindlimb and foot muscles and observing the behavior of the Bornean orangutan through video observations. The results showed that digital flexor muscles are more developed than plantar flexor muscles as an adaptation towards arboreal activities that require finger flexor movements such as gripping tree branches. Orangutans have rudimentary hallux, which is related by the less developed intrinsic muscle and indicated by the way orangutan grips tree branches dominantly using digits II-V. At a certain time, male Bornean orangutans are active on terrestrial that causes the digital extensor muscles to have more developed as an adaptation to terrestrial activity. It can be concluded the morphology of the lower hindlimb and foot muscles is in accordance to its function and behavior adaptation in arboreal and terrestrial.
www.researchgate.net/publication/370415866_MORPHOFUNCTIONAL_CHARACTERISTICS_OF_THE_LOWER_HINDLIMB_AND_FOOT_MUSCLES_OF_BORNEAN_ORANGUTAN_Pongo_pygmaeus
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Post by oldindigosilverback on May 22, 2023 2:35:01 GMT -5
Reply 24. I am surprise that orang trans face relatively low predation from even tigers. While it is true that tigers in Malaysia, Borneo, and Indonesia are among the smallest subspecies, they are still heavier than the ape of not mistaken. Clouded leopards are too small to take on a male orang utan.
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Post by Gorilla king on May 22, 2023 6:36:03 GMT -5
They are still heavier than orangutans yes, still much heavier on average. They obviously have good anti-predator strategies.
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Post by brobear on Jun 7, 2023 8:40:14 GMT -5
They are still heavier than orangutans yes, still much heavier on average. They obviously have good anti-predator strategies. strategy #1; Wild orangutans rarely set foot on the ground.
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Post by Gorilla king on Jun 7, 2023 19:37:14 GMT -5
Relative leg-to-arm strength proportions in Bornean and Sumatran orangutans
Abstract
Differences in habitat continuity and predators have been posited as explanations for higher rates of terrestrial locomotion in Bornean compared to Sumatran orangutans. However, it is unclear whether greater terrestriality in Bornean orangutans is due to recent environmental changes to their habitats. Orangutan skeletons collected a century ago may shed new light on this question as habitat continuity on both islands would have been greater in the past. In this study, cross-sectional geometry ratios were calculated for orangutans from CT scans. Both orangutan taxa show significantly less relative leg-to- arm strength than all gorillas, even those that climb the most (i.e., western lowland gorillas and infant mountain gorillas). Moreover, Bornean orangutans display limb bone strength proportions that are consistent with more terrestriality than their Sumatran counterparts. Thus, recent habitat discontinuity in Borneo does not explain greater terrestriality in Bornean orangutans, as also suggested by camera trap data, and is most likely due to the absence of tigers on Borneo.
www.researchgate.net/publication/367635544_Relative_leg-to-arm_strength_proportions_in_Bornean_and_Sumatran_orangutans
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