Comparative study of lactate dehydrogenase in fifteen genera of New World monkeys

Electrophoretic variation of LDH was investigated in 3,200 specimens belonging to 28 species and 15 genera of New World monkeys. A small sample of (Old World) Cercopithecus aethiops was also tested for comparison. Variation was observed in seven species, five alleles being detected for both LDHA and LDHB loci. The frequency of the variant alleles was low in almost all species, the exceptions being Callithrix kuhli and Callithrix jacchus penicillata, in which the LDHA*5 allele showed frequencies of 47 per cent and 60 per cent, respectively. In the monomorphic patterns the B4 and A4 bands were the same in all fifteen genera, but differences were observed in the B3A1, B2A2 and BlA3 hybrid bands. Furthermore, only the B4 band was shared by humans, Old World and New World monkeys. An important marker was found in the genus Cebus, which clearly distinguishes the "tufted" and "untufted" groups.

Factores ambientales que afectan el comportamiento de primates en habitad especiales / Annual Reports 1991 / Environmental factors affecting the behavior of primates in special habitats

It was observed the effects of captivity on the reproductive competence of monkeys, to measure the degree of adaptation to a confined situation. These observation were made on Cebus, Aotus, and Saimiri monkeys, from two different monkeys colonies, facing a project of establishment a breeding monkey colony at the IICS. It was observed the behavior of the monkeys concerning the aggressivness against the other monkeys in the cage and themselves, the organization of social groups, and its hierarchy. It was evidenced the importance of the tryning of the staff dealing with the monkeys, as factor influencing the behavior of the animals. It was observed the importance of the organization of the colony, concerning the surroundings of the cages, ventilation, room temperature, illumination, presence of personnel, location of other cages, as factors exerting a strong influence in the behavior of the monkeys

ABO blood groups in two species of peruvian night monkeys (Aotus nancymai and Aotus vociferans)

Foram coletadas amostras de sangue e saliva de 93 animais da espécie Aotus nancymai e 20 de A. vociferans. As amostras de saliva foram testadas para a presença de antígenos ABH humanos, através do teste convencional de inibiçäo da hemaglutinaçäo, o qual nos permitiu classificar 21 A. nancymai e 10 A. vociferans como sendo do grupo B e 72 A. nancymai e 10 A. vociferans como pertencentes ao grupo O. Amostras de soro foram utilizadas para detectar aglutininas naturais do sistema ABO. Os resultados mostraram algumas discrepâncias entre os fenótipos séricos e salivares, como também sugeriram a existência de anticorpos anti-A1 nessas espécies