|
The Great Apes
|
Big Chimanuka and his group eating Bamboo. He even splits bamboo at around 2:04 min.
Large male climbing down a tree in Kahuzi Biega NP.
 *This image is copyright of its original author
The massive Guhonda beating his chest.
 *This image is copyright of its original author
Gorillas are amazing apes, my favorite ape followed close by the chimpanzee.
These aren't wild gorrilas but its the best thing i can see. As they would act more differently in the wild, they still have their wild instincts to live as best they can with what they got. This is Frankie and his Father Mrithi. He also has a 8 year old male named Ivan.  *This image is copyright of its original author Here is Ivan and Frankie. As you can see Ivan is becoming more muscular and getting to the age of sexual maturity.  *This image is copyright of its original author  *This image is copyright of its original author We sadly lost Ivan and Frankies grandmother, who was the 4th oldest gorilla in the united states passed away in December of 2018. 
Immature wild orangutans acquire relevant ecological knowledge through sex-specific attentional biases during social learning
Abstract As a part of growing up, immature orangutans must acquire vast repertoires of skills and knowledge, a process that takes several years of observational social learning and subsequent practice. Adult female and male orangutans show behavioral differences including sex-specific foraging patterns and male-biased dispersal. We investigated how these differing life trajectories affect social interest and emerging ecological knowledge in immatures. We analyzed 15 years of detailed observational data on social learning, associations, and diet repertoires of 50 immatures (16 females and 34 males), from 2 orangutan populations. Specific to the feeding context, we found sex differences in the development of social interest: Throughout the dependency period, immature females direct most of their social attention at their mothers, whereas immature males show an increasing attentional preference for individuals other than their mothers. When attending to non-mother individuals, males show a significant bias toward immigrant individuals and a trend for a bias toward adult males. In contrast, females preferentially attend to neighboring residents. Accordingly, by the end of the dependency period, immature females show a larger dietary overlap with their mothers than do immature males. These results suggest that immature orangutans show attentional biases through which they learn from individuals with the most relevant ecological knowledge. Diversifying their skills and knowledge likely helps males when they move to a new area. In sum, our findings underline the importance of fine-grained social inputs for the acquisition of ecological knowledge and skills in orangutans and likely in other apes as well.
Old throwback image of a large silverback Grauer's gorilla, Kahuzi Biega NP. He kind of reminds me of the father to the famous Chimanuka.
 *This image is copyright of its original author
Kasakela troop leader Figan, who lead his troop through the 4 year Gombe Chimpanzee War against the Kahama troop in Tanzania. These events took place between 1974 to 1978 in Gombe National Park on the Tanzanian highlands.
 *This image is copyright of its original author
Lethal coalitionary attacks of chimpanzees (Pan troglodytes troglodytes) on gorillas (Gorilla gorilla gorilla) in the wild
Abstract Intraspecies violence, including lethal interactions, is a relatively common phenomenon in mammals. Contrarily, interspecies violence has mainly been investigated in the context of predation and received most research attention in carnivores. Here, we provide the first information of two lethal coalitionary attacks of chimpanzees (Pan troglodytes troglodytes) on another hominid species, western lowland gorillas (Gorilla gorilla gorilla), that occur sympatrically in the Loango National Park in Gabon. In both events, the chimpanzees significantly outnumbered the gorillas and victims were infant gorillas. We discuss these observations in light of the two most widely accepted theoretical explanations for interspecific lethal violence, predation and competition, and combinations of the two-intraguild predation and interspecific killing. Given these events meet conditions proposed to trigger coalitional killing of neighbours in chimpanzees, we also discuss them in light of chimpanzees’ intraspecific interactions and territorial nature. Our findings may spur further research into the complexity of interspecies interactions. In addition, they may aid in combining field data from extant models with the Pliocene hominid fossil record to better understand behavioural adaptations and interspecific killing in the hominin lineage.  (07-25-2021, 10:14 AM)Sully Wrote: Lethal coalitionary attacks of chimpanzees (Pan troglodytes troglodytes) on gorillas (Gorilla gorilla gorilla) in the wild Given that chimps always travel in larger group, I can see why infant gorillas become the victims.
Big old Chimanuka feeding in the marshes of Kahuzi Biega alone.
 *This image is copyright of its original author  *This image is copyright of its original author
(07-25-2021, 10:14 AM)Sully Wrote: Lethal coalitionary attacks of chimpanzees (Pan troglodytes troglodytes) on gorillas (Gorilla gorilla gorilla) in the wildInteresting post. I read about something similar the other day, chimpanzee groups sometimes revel in the hunt and just let loose. It's a shame the infant gorillas are bound to get seriously hurt and even killed in such a onslaught, but hopefully silverbacks are more than enough to fend them off or else more members of the group get seriously hurt. (08-02-2021, 02:52 PM)The Panther Wrote:(07-25-2021, 10:14 AM)Sully Wrote: Lethal coalitionary attacks of chimpanzees (Pan troglodytes troglodytes) on gorillas (Gorilla gorilla gorilla) in the wildInteresting post. I read about something similar the other day, chimpanzee groups sometimes revel in the hunt and just let loose. It's a shame the infant gorillas are bound to get seriously hurt and even killed in such a onslaught, but hopefully silverbacks are more than enough to fend them off or else more members of the group get seriously hurt. Yea in both cases the silverback ran or was chased away from the situation leaving the young vulnerable. The chimps probably know to gang up on them as getting them out of the picture makes prey much easier to access.
Silverback from Bwindi impenetrable forest, Uganda.
 *This image is copyright of its original author
Old Kingo from Brazzaville, Republic of Congo.
 *This image is copyright of its original author
|
| Users browsing this thread: |
| 13 Guest(s) |