Percorrer por autor "Borges, Filipa"
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- Dietary flexibility of western red colobus in two protected areas with contrasting anthropogenic pressurePublication . Aleixo-Pais, Isa; Borges, Filipa; Sesay, Nazie; Songe, Mustapha; Cassama, Mamadu; Camara, Iaia T.; Ramos, Catarina; Barca, Benjamin; Turay, Brima S.; Swaray, Mohamed; Barros, Aissa Regalla de; Quecuta, Queba; Silva, Maria Joana F. da; Frazão-Moreira, Amélia; Bruford, Michael William; Minhos, TaniaFood distribution and abundance can affect intra- and inter-dietary variation in non-human primates, influencing feeding ecology and altering behaviour. Natural and/or human-induced actions can influence the dynamics between primates and the environment, with associated impacts on socio-ecology and demography. This relationship in anthropogenic landscapes, however, is poorly understood. Here, we use DNA metabarcoding to obtain high resolution dietary diversity data, and multivariate generalised linear models to investigate variation in the diet of this threatened primate. We characterise the diet of the western red colobus (Piliocolobus badius) in both the better preserved Gola Rainforest National Park (GRNP, Sierra Leone), and in the fragmented forests of Cantanhez National Park (CNP, Guinea-Bissau), and evaluate biological, ecological and temporal differences. Dietary plant species richness was high in both protected areas, and the type of plants consumed varied significantly across seasons, space, and time. Although we identify dependence on a few key plants, red colobus in CNP consumed a higher average number of plant taxa than in GRNP, and 11% of the diet consisted of cultivated foods (e.g. mango). This is the first time a molecular approach has been used to investigate red colobus diet, and reveal dietary flexibility in degraded forests. Predicting the consequences of dietary change on long-term population persistence, however, remains a significant knowledge gap. Nevertheless, our results provide critical information to inform targeted regional conservation planning and implementation.
- Improving Information on Over-looked Generalists: Occurrence and Mitochondrial DNA Diversity of Campbell’s (Cercopithecus campbelli) and Green Monkeys (Chlorocebus sabaeus) in Guinea–Bissau, West AfricaPublication . Colmonero-Costeira, Ivo; Djaló, Saidil Lamine; Nelson, Fernandes; Borges, Filipa; Aleixo-Pais, Isa G.; Gerini, Federica; Costa, Mafalda; Minhós, Tânia; Silva, Maria Joana Ferreira daNon-threatened primates are often overlooked in conservation efforts despite their increasing vulnerability to local extirpation. Campbell’s (Cercopithecus campbelli) and green monkeys (Chlorocebus sabaeus) are sympatric medium-sized West African guenons (tribe Cercopithecini) whose intraspecific genetic diversity remains understudied in most of their distribution. Both species are ecological generalists and are globally considered non-threatened. In Guinea–Bissau, C. campbelli and Chl. sabaeus are considered the most abundant of the ten extant primate species and are the most frequently hunted for meat. Their populations are thought to be decreasing and but up-to-date data on their occurrence in the country hinders their conservation status assessment. We aimed to update occurrence data and estimate the country-wide mitochondrial (mtDNA) genetic diversity for both species in Guinea–Bissau. From 2008–2022, we conducted surveys in four mainland protected areas and on the islands of the Bijagós Archipelago. We identified C. campbelli populations outside their known distribution. We found high mtDNA diversity for both species on the mainland and lower diversity in insular populations. Our results show significant signals of geographically induced mtDNA differentiation, particularly in C. campbelli. In Chl. Sabaeus, we found divergent haplotypes at geographically close locations. We identified differentiated haplogroups with an estimated divergence time of 1.53 million years ago (Ma) in C. campbelli and 1.16 Ma in Chl. sabaeus, possibly linked to Pleistocene climatic fluctuations. Given the local presence of differentiated mtDNA haplogroups across these and other primate species, we suggest that Guinea–Bissau should be considered as an important region for primate conservation in West Africa.