![]() Mountain gorillas also live in stable family groups, usually with a dominant male and one or more females who care for their offspring for between 8 and 15 years. ![]() Even our closest relatives, chimpanzees, are much less likely to survive if their mothers die before they reach adolescence.Īlthough orphan survival is not the norm for mammals, humans may not be entirely unique. If a child loses their mother, relatives, friends and the wider community can take over. In cases where orphaned individuals do reach adulthood, they often suffer negative effects, like reduced reproductive success or lower social status. ![]() In these species, losing a mother at a young age has dramatic consequences for survival. Most mammals depend entirely upon their mothers when they are born. In contrast to most social mammals, where maternal loss causes considerable social adversity, in mountain gorillas, as in certain human populations, this may be buffered by relationships within cohesive social groups, breaking the link between maternal loss, increased social adversity, and decreased fitness. Social network analysis revealed that relationships with other group members, particularly dominant males and those close in age, strengthened following maternal loss. We investigated the consequences of maternal loss in mountain gorillas and found no discernible fitness costs to maternal loss through survival, age at first birth, or survival of first offspring through infancy. However, in some human populations these negative consequences can be overcome by care from other group members. ![]() In these species the social adversity caused by maternal loss later in life can dramatically reduce fitness. I really hope they help you improve your drawing skills.Mothers are crucial for mammals’ survival before nutritional independence, but many social mammals reside with their mothers long after. Thanks for using my drawing instructions. To use this gorilla step-by-step drawing tutorial, and all additional materials, you can download the completely free PDF file, which I created especially for you: Gorilla Drawing Tutorial and Extra Printables.
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