Urban biodiversity: Cuterebriasis in free-ranging Robinson's mouse opossum (Marmosa robinsoni) in the suburbs of Barranquilla, Colombia.

The tropical dry forest is one of the world's most threatened ecosystems and is the habitat of the Robinson's Mouse Opossum (Marmosa robinsoni), a small marsupial within the Didelphidae family. This study aimed to describe cases of cuterebriases in free-ranging M. robinsoni by examining individuals caught in live animal traps. Sherman traps were deployed in four different sites over three different periods in five days. All animals passed through biometry, weighing, sampling parasites, and sampling feces. Only animals captured in the study site located close to the city were anesthetized and examined. The evaluation included blood samples and a clinical examination. Animals received anesthesia under physical restraint by intramuscular injections of ketamine and xylazine. For anesthetic reversion, the protocol was Yohimbine administered before release. In total, 8% (5/60) of all captured animals had fly larvae extracted from wounds. The molecular Barcode of the mitochondrial Cytochrome Oxidase I gene showed no match with any recognized species of Cuterebra. The animals weighed from 35 to 80 g and had lesions in the scapular region with parasites under their skin in sizes ranging from 1.3 to 2.2 cm. The animals with parasites were in good physical condition without evidence of disturbances in health conditions. This is compatible with literature, reporting little effect on population dynamics of other host species infected with Cuterebra larvae. The study included 24 animals captured in three areas far from any city, which showed no evidence of cuterebrid infection, suggesting that proximity to the city could increase exposure to cuterebriasis. There are reports of cuterebrids in M. robinsoni in Brazil; however, this is the first report of cuterebriasis in M. robinsoni in Colombia.

Physiological and parasitological implications of living in a city: the case of the white-footed tamarin (Saguinus leucopus).

Among primates, the Neotropical Callitrichid monkeys (tamarins and marmosets) exhibit a particular ability to adapt to disturbed and urbanized environments. However, little is known about physiological and health status in contrasting ecological contexts. An example of adaptation to urban environments is the white-footed tamarin (Saguinus leucopus), an endangered species endemic to the central Andes in North West Colombia. This species was used as a model to contrast physical condition, physiological parameters and the parasite community of wild populations in rural and urban settings. Overall, the tamarins seemed to be in good body condition in both environments; however, urban tamarins exhibited overweight, elevated body mass, and higher cholesterol levels, while rural tamarins showed larger diversity and prevalence of parasites. Variation in several hematological parameters associated with altitude was also observed. Our data provide preliminary evidence of differential physiological responses to urban and rural environments in tamarins. These results may be attributed to nutritional factors, physical activity, and specific parasite-host ecological interactions in these two environments. Also, abundance and diversity of the parasite community in urban environments may be potentially constrained by habitat fragmentation and relatively fewer reservoirs. Finally, significant physiological and ecological disparities between white-footed tamarins occurring in urban and rural habitats as well as physiological response to hypoxia at higher altitudes were evidenced here. This study provides important preliminary information that will be useful to determine the ability of New World primate populations to cope with urban development and rapidly changing environments.

Identification of species-specific nuclear insertions of mitochondrial DNA (numts) in gorillas and their potential as population genetic markers.

The first hyper-variable region (HV1) of the mitochondrial control region (MCR) has been widely used as a molecular tool in population genetics, but inadvertent amplification of nuclear translocated copies of mitochondrial DNA (numts) in gorillas has compromised the use of mitochondrial DNA in population genetic studies. At least three putative classes (I, II, III) of gorilla-specific HV1 MCR numts have been uncovered over the past decade. However, the number, size and location of numt loci in gorillas and other apes are completely unknown. Furthermore, little work to date has assessed the utility of numts as candidate population genetic markers. In the present study, we screened Bacterial Artificial Chromosome (BAC) genomic libraries in the chimpanzee and gorilla to compare patterns of mitochondrial-wide insertion in both taxa. We conducted an intensive BLAST search for numts in the gorilla genome and compared the prevalence of numt loci originating from the MCR with other great ape taxa. Additional gorilla-specific MCR numts were retrieved either through BAC library screens or using an anchored-PCR (A-PCR) amplification using genomic DNA from five unrelated gorillas. Locus-specific primers were designed to identify numt insertional polymorphisms and evaluate their potential as population genetic markers. Mitochondrial-wide surveys of chimpanzee and gorilla BACs showed that the number of numts does not differ between these two taxa. However, MCR numts are more abundant in chimpanzees than in other great apes. We identified and mapped 67 putative gorilla-specific numts, including two that contain the entire HV1 domain, cluster with sequences from two numt classes (I, IIb) and will likely co-amplify with mitochondrial sequences using most published HV1 primers. However, phylogenetic analysis coupled with post-hoc analysis of mitochondrial variation can successfully differentiate nuclear sequences. Insertional polymorphisms were evident in three out of five numts examined, indicating their potential utility as molecular markers. Taken together, these findings demonstrate the potentially powerful insight that numts could make in uncovering population history in gorillas and other mammals.

Valoración clínica y parasitológica del tití gris (Primates: Cebidae: Saguinus leucopus) en dos poblaciones naturales presentes en San Carlos y San Rafael (Antioquia, Colombia) / Clinical and parasitological evaluation of White-footed Tamarins (Primates: Cebidae: Saguinusleucopus) from two free-range populations located in San Carlos and San Rafael (Antioquia, Colombia) / Valoração clínica e parasitológica do sagui cinza (Primates: Cebidae: Saguinus leucopus) em duas populações naturais que se encontram em San Carlos e San Rafael (Antioquia, Colômbia)

Resumen El estudio de individuos en cautiverio de primates Neotropicales ha permitido conocer aspectos básicos de su historia natural. Sin embargo las condiciones medioambientales pueden determinar diferencias ecológicas y fisiológicas en poblaciones silvestres. En el caso del tití gris (Saguinus leucopus), primate endémico del noroccidente colombiano, diferentes parámetros fisiológicos han sido evaluados en cautiverio. Con el fin de diagnosticar el estado de salud en condiciones naturales, se evaluaron varias características externas y parámetros fisiológicos, así como la comunidad de parásitos de dos poblaciones naturales. Aunque en general no se detectaron signos de deterioro en las condiciones generales de salud, se identificaron once taxones de parásitos entre helmintos y protozoos, algunos con alta prevalencia (filarias y Trypanosoma spp). Las comunidades de parásitos en cautiverio y en estado silvestre muestran diferencias notables. Igualmente, se identificó una aparente variación entre poblaciones silvestres e incluso entre grupos sociales circundantes con respecto a los perfiles hematológicos y de química sanguínea, que sugiere diferencias en la respuesta fisiológica ante condiciones medioambientales. Ninguna de dichas variables fisiológicas pareció estar relacionada con los parásitos encontrados. Los resultados revelaron una amplia diversidad de parásitos y una elevada tasa de infecciones parasitarias en poblaciones naturales de S. leucopus, que parecen no estar asociadas con indicadores de la condición de salud. Futuros estudios deberán enfatizar en aspectos ecológicos, genéticos y demográficos que determinen las condiciones de salud de S. leucopus en su medio natural. Se recomienda que la rehabilitación de individuos en cautiverio tenga presente posibles diferencias en variables fisiológicas y epidemiológicas entre poblaciones naturales y grupos en cautiverio con el fin de restringir la transmisión de agentes infecciosos entre ...

Abstract While much of the natural history of Neotropical primates has been revealed through studies conducted in captive individuals, environmental factors may impose ecological and physiological differences in free-range populations. For the white-footed tamarin (Saguinus leucopus), a primate endemic to Northwest Colombia, physiological parameters that have been assessed in captivity still remain to be measured in free-range populations. In order to diagnose the health status of this species in a natural environment, we assessed several external traits, measured hematological and blood-chemistry values, and characterized the parasite community of two natural populations. Despite the identification of eleven different parasite taxa and wide distribution of filaria and Trypanosoma spp., we faieled to detect signs of poor health condition. Substantial differences were found between captive and free-range tamarin populations in the composition of their parasite communities. Likewise, hematological and blood-chemistry profiles differed between free-range populations and even between neighboring social groups, suggesting a role of environmental factors in the physiological response. However, none of the physiological parameters varied as a response to parasite infection. Our results revealed a high diversity of parasites and elevated rates of parasitic infections in natural populations of S. leucopus, that do not seem to be associated with indicators of health conditions. Future studies should emphasize on ecological, genetic and demographic factors that determine the health conditions of S. leucopus in the wild. Lastly, geographic variation of physiological profiles and parasite distribution, as well as epidemiological differences between captive and wild populations, should be incorporated in rehabilitation plans of captive tamarins in order to restrict the transmission of infectious agents between populations.

Resumo O estudo de indivíduos em cativeiro de primatas Neotropicais tem permitido conhecer aspectos básicos da história natural. Embora as condições ambientais podem determinar diferenças ecológicas e fisiológicas em populações silvestres. No caso do sagui cinza (Saguinus leucopus), primata endémico do noroeste colombiano, diferentes parâmetros fisiológicos tem sido avaliados em cativeiro. Com o intuito de diagnosticar o estado de saúde em condições naturais, avaliaram-se vários rasgos externos e parâmetros fisiológicos, assim como a comunidade de parasitas de duas populações naturais. Ainda que em geral não se detectassem signos de deterioro nas condições gerais de saúde, identificaram-se onze táxones de parasitas entre helmintos e protozoários, alguns com alta prevalência (filarias e Trypanosoma spp). As comunidades de parasitas em cativeiro e no estado silvestre mostram diferenças notáveis. Igualmente, identificou-se uma aparente variação entre populações silvestres e entre grupos sociais circundantes com respeito aos perfis hematológicos e de química sanguínea, que sugere diferenças na resposta fisiológica diante condições ambientais do médio. Nenhuma das mencionadas variáveis fisiológicas pareceu estar relacionada com as parasitas encontradas. Os resultados revelaram uma grande diversidade de parasitas e uma alta taxa de infecção parasitária em populações naturais de S. leucopus, que não parecem estar associados com indicadores do condição de saúde. Estudos deste tipo no futuro deveram enfatizar em aspectos ecológicos, genéticos e demográficos que determinem as condições de saúde de S. leucopus em seu médio natural. Recomenda-se que a reabilitação de indivíduos em cativeiro tenha presente possíveis diferenças em variáveis fisiológicas e epidemiológicas entre populações naturais e grupos em cativeiro com o fim de restringir a transmissão de agentes infeciosos entre populações.