Using the quick search there are shown up to three reports about decline:
A pioneering study of wild chimpanzees has found that these close human relatives do not routinely experience menopause, rebutting previous studies of captive individuals which had postulated that fem...
Biowissenschaften Chemie |The study, of black-and-white colobus monkeys and red colobus monkeys in tropical forests in western Uganda, appears in the American Journal of Primatology. Once dominated by vast forests, Uganda now ...
Biowissenschaften Chemie |Using the fulltext-search for the word decline you can set up serveral searching-options > choose search options