Demographic review of a captive colony of callitrichids (Callithrix kuhlii).

Germ-line chimerism and paternal care in marmosets (<i>Callithrix kuhlii</i>)

On the Morphological Distinctiveness of Callithrix

The dwarf marmoset, described as Callithrix humilis by van Roosmalen et al. (1998), is an anomaly among Amazonian marmosets for its size, morphology and behavior. We compare cranial and mandibular characters of the dwarf marmoset with representatives of four other callitrichid genera. C. humilis displays qualitative differences in skull morphology when compared to other callitrichids, and a dis...

Environmental enrichment techniques in non-human primates. The case of Callitrichids.

In this paper, we discuss issues concerning the welfare of non-human primates used in laboratory research from an eco-ethological standpoint and suggest means of improving welfare. Following a brief review of the use of non-human primates in European countries and of the legislation that governs this use, we illustrate how a thorough eco-ethological knowledge of the species being studied can pl...

Can we measure brain efficiency? An empirical test with common marmosets (Callithrix jacchus).

Various measures of brain size correlate with cognitive performance; however, the fit is not perfect, which bears the question of whether brains also vary in efficiency. Such variation could be expected if a species faces constraints on brain enlargement, for example due to the impossibility of slowing down life history as a consequence of predator pressure, while simultaneously experiencing se...

Severe intragroup aggressions in captive common marmosets (Callithrix jacchus).

Members of captive colonies of common marmosets (Callithrix jacchus), a small New World primate, can occasionally be victims of repeated, and potentially fatal, attacks by a family-mate. This study examined the records of a colony, looking for past instances of such aggressions. The aim was to better understand the possible causes underlying this phenomenon and to identify variables that could ...