Non-human primate species are considered as good models for human cancer research. Despite the relevant phylogenetic position of prosimians, few reports of neoplastic diseases have been described in these species. The...Non-human primate species are considered as good models for human cancer research. Despite the relevant phylogenetic position of prosimians, few reports of neoplastic diseases have been described in these species. The current study investigated implication of an intestinal T-cell lymphoma in a 5-year-old female ring-tailed lemur (Lemur catta) hosted at Parco Natura Viva, an Italian zoological garden. First, a sub-occlusive thickening of the small bowel was found. Histologically, the lesion was caused by a malignant lymphoid infiltrate that was homogeneously CD3+. Moreover, inflammatory patterns peripheral to the lesion suggested a coeliac disease similar to that reported in human. A huge malignant lymphoid infiltrate was present also in the liver and spleen. Overall, the case suggests an etiopathological relationship between coeliac-like disease and intestinal T-lymphoma, as reported in several human studies. Findings from this study are useful to improve our knowledge on the occurrence of the T-lymphoma as well as to improve the husbandry and dietary protocol of prosimians in zoos.展开更多
Vocal individuality is widespread in social animals. Individual variation in vocalizations is a prereq- uisite for discriminating among conspecifics and may have facilitated the evolution of large complex societies. R...Vocal individuality is widespread in social animals. Individual variation in vocalizations is a prereq- uisite for discriminating among conspecifics and may have facilitated the evolution of large complex societies. Ring-tailed lemurs Lemur catta live in relatively large social groups, have con- spicuous vocal repertoires, and their species-specific utterances can be interpreted in light of source-filter theory of vocal production. Indeed, their utterances allow individual discrimination and even recognition thanks to the resonance frequencies of the vocal tract. The purpose of this study is to determine which distinctive vocal features can be derived from the morphology of the upper vocal tract. To accomplish this, we built computational models derived from anatomical measurements collected on lemur cadavers and compared the results with the spectrographic out- put of vocalizations recorded from ex situ live individuals. Our results demonstrate that the mor- phological variation of the ring-tailed lemur vocal tract explains individual distinctiveness of their species-specific utterances. We also provide further evidence that vocal tract modeling is a power- ful tool for studying the vocal output of non-human primates.展开更多
文摘Non-human primate species are considered as good models for human cancer research. Despite the relevant phylogenetic position of prosimians, few reports of neoplastic diseases have been described in these species. The current study investigated implication of an intestinal T-cell lymphoma in a 5-year-old female ring-tailed lemur (Lemur catta) hosted at Parco Natura Viva, an Italian zoological garden. First, a sub-occlusive thickening of the small bowel was found. Histologically, the lesion was caused by a malignant lymphoid infiltrate that was homogeneously CD3+. Moreover, inflammatory patterns peripheral to the lesion suggested a coeliac disease similar to that reported in human. A huge malignant lymphoid infiltrate was present also in the liver and spleen. Overall, the case suggests an etiopathological relationship between coeliac-like disease and intestinal T-lymphoma, as reported in several human studies. Findings from this study are useful to improve our knowledge on the occurrence of the T-lymphoma as well as to improve the husbandry and dietary protocol of prosimians in zoos.
文摘Vocal individuality is widespread in social animals. Individual variation in vocalizations is a prereq- uisite for discriminating among conspecifics and may have facilitated the evolution of large complex societies. Ring-tailed lemurs Lemur catta live in relatively large social groups, have con- spicuous vocal repertoires, and their species-specific utterances can be interpreted in light of source-filter theory of vocal production. Indeed, their utterances allow individual discrimination and even recognition thanks to the resonance frequencies of the vocal tract. The purpose of this study is to determine which distinctive vocal features can be derived from the morphology of the upper vocal tract. To accomplish this, we built computational models derived from anatomical measurements collected on lemur cadavers and compared the results with the spectrographic out- put of vocalizations recorded from ex situ live individuals. Our results demonstrate that the mor- phological variation of the ring-tailed lemur vocal tract explains individual distinctiveness of their species-specific utterances. We also provide further evidence that vocal tract modeling is a power- ful tool for studying the vocal output of non-human primates.
