scholarly journals Risk factors connected to gastrointestinal parasites in mantled Alouatta palliata mexicana and black howler monkeys Alouatta pigra living in continuous and in fragmented rainforests in Mexico

2012 ◽  
Vol 58 (3) ◽  
pp. 375-383 ◽  
Author(s):  
Genoveva Trejo-Macías ◽  
Alejandro Estrada
Keyword(s):  
Parasite Species ◽  
Alouatta Palliata ◽  
Gastrointestinal Parasites ◽  
Howler Monkey ◽  
Wet Season ◽  
Howler Monkeys ◽  
Fecal Samples ◽  
Fragmented Habitat ◽  
Monkey Species ◽  
Alouatta Palliata Mexicana

Abstract In this study we document the prevalence of gastrointestinal parasites (helminths and protozoans) found in fecal samples of populations of Alouatta palliata mexicana and of A. pigra in Los Tuxtlas and in Palenque, southeast Mexico, and its relation to habitat condition, sex/age and season. Nineteen parasite morphotypes were detected in the fecal samples from populations of the two howler monkeys, of which 58% were shared by both species. When considering all parasite species, populations of the two howler species were more likely to be parasitized in fragmented habitat compared to continuous habitat. Individuals of both howler monkey species that lived in fragmented habitat had a higher prevalence of Controrchis biliophilus. A. p. mexicana individuals had a higher prevalence of Trypanoxyuris minutus than A. pigra, probably the result of the larger group sizes found in the former species, and T. minutus was more likely to be found in A. palliata individuals that lived in fragmented habitat. Adult A. p. mexicana males had a higher risk of being parasitized compared to adult females, but these differences were not detected in A. pigra. Parasite species such as Entamoeba sp., Nematoda sp. 28, Nematoda sp. B and Parabronema sp. where only found during the wet season in both howler monkey species. Populations of both howler monkey species had a higher prevalence of Nematoda sp. A in the wet season and Ascaridae eggs were only detected during the wet season in A. pigra. Other parasites detected displayed no clear seasonal pattern.

scholarly journals Interacting effects of forest fragmentation and howler monkey foraging on germination and disperal of fig seeds

Oryx ◽  
2002 ◽  
Vol 36 (3) ◽  
pp. 266-271 ◽  
Author(s):  
Juan Carlos Serio-Silva ◽  
Victor Rico-Gray
Keyword(s):  
Dispersal Distance ◽  
Alouatta Palliata ◽  
Howler Monkey ◽  
Forest Fragment ◽  
Howler Monkeys ◽  
Conservation Policies ◽  
Dispersal Distances ◽  
Alouatta Palliata Mexicana ◽  
Fragmented Forests ◽  
Individual Trees

We studied changes in germination rates and dispersal distance of seeds of Ficus perforata and F. lundelli dispersed by howler monkeys (Alouatta palliata mexicana), in a small (40 ha) ‘disturbed’ and a larger (>600 ha) ‘preserved’ tropical rainforest in southern Veracruz, Mexico. The interaction between A. p. mexicana and Ficus (Urostigma) spp. is beneficial for the interacting species and has important implications for their conservation. Howler monkeys gain from the ingestion of an important food source, germination rates of Ficus seeds are improved by passage through the monkeys' digestive tract, and the seeds are more likely to be deposited in a site suitable for germination and development. Seed dispersal distances are relatively larger in the preserved site, with both the size of the forest area and the spatial pattern of Ficus affecting the dispersal process. In a large forest fragment with ‘regularly’ distributed Ficus individuals the howler monkeys move away from the seed source, increasing the probability that the seeds are desposited on a tree other than Ficus, which is important for the germination and future development of a hemiepiphytic species. In a small forest fragment with trees distributed in clumps howlers repeatedly use the same individual trees, and faeces containing seeds may be dropped on unsuitable trees more often. These are key issues when addressing conservation policies for fragmented forests.

Howler Monkeys (Alouatta palliata mexicana) Produce Tannin-Binding Salivary Proteins

2015 ◽  
Vol 36 (6) ◽  
pp. 1086-1100 ◽  
Author(s):  
F. Espinosa Gómez ◽  
Juan Santiago García ◽  
Sergio Gómez Rosales ◽  
Ian R. Wallis ◽  
Colin A. Chapman ◽  
...  
Keyword(s):  
Alouatta Palliata ◽  
Salivary Proteins ◽  
Howler Monkeys ◽  
Alouatta Palliata Mexicana

Limited genetic diversity in the critically endangered Mexican howler monkey (Alouatta palliata mexicana) in the Selva Zoque, Mexico

Primates ◽  
2013 ◽  
Vol 55 (2) ◽  
pp. 155-160 ◽  
Author(s):  
Jacob C. Dunn ◽  
Aralisa Shedden-González ◽  
Jurgi Cristóbal-Azkarate ◽  
Liliana Cortés-Ortiz ◽  
Ernesto Rodríguez-Luna ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Alouatta Palliata ◽  
Critically Endangered ◽  
Howler Monkey ◽  
Alouatta Palliata Mexicana ◽  
Limited Genetic Diversity

scholarly journals The Influence of Large Tree Density on Howler Monkey (Alouatta palliata mexicana) Presence in Very Small Rain Forest Fragments

Biotropica ◽  
2007 ◽  
Vol 39 (6) ◽  
pp. 760-766 ◽  
Author(s):  
Víctor Arroyo-Rodríguez ◽  
Salvador Mandujano ◽  
Julieta Benítez-Malvido ◽  
Carla Cuende-Fanton
Keyword(s):  
Rain Forest ◽  
Alouatta Palliata ◽  
Tree Density ◽  
Howler Monkey ◽  
Forest Fragments ◽  
Large Tree ◽  
Alouatta Palliata Mexicana

scholarly journals A ten-year demographic history of a population of howler monkeys (Alouatta palliata) living in a fragmented landscape in Mexico

2015 ◽  
Author(s):  
Jurgi Cristóbal Azkarate ◽  
Jacob Charles Dunn ◽  
Cristina Domingo Balcells ◽  
Joaquim Veà Baró
Keyword(s):  
Demographic History ◽  
Demographic Data ◽  
Resource Scarcity ◽  
Alouatta Palliata ◽  
Howler Monkey ◽  
Fragmented Landscape ◽  
Howler Monkeys ◽  
Mantled Howler ◽  
Mantled Howler Monkey

Long-term field studies of primates are critical for our understanding of life history and the processes driving changes in demography. Here, we present the first long-term demographic data for the northernmost population of the mantled howler monkey (Alouatta palliata). We followed 10 groups of howler monkeys living in a highly fragmented landscape between 2000 and 2011. Forest fragmentation did not seem to play a major role in the dynamics of our population, as the population size remained relatively stable over the 10-year study period, and birth rates and inter-birth intervals were comparable to those of howler monkeys at other sites. Moreover, dispersal events were commonplace, particularly secondary dispersal (individuals emigrating from groups that they had previously immigrated into), which supports the suggestion that this may be an important component of the reproductive strategy of the mantled howler monkey. Finally, we found a marked effect of seasonality on the population dynamics of our study population. In particular, the period of lowest temperatures and resource scarcity between November and March was associated with higher mortality and reproductive inhibition, while the period of resource abundance between April and May was associated with the majority of conceptions and weaning of offspring. This, in turn, could be influencing dispersal patterns in our study area, as male howler monkeys seem to time some of their immigrations into new groups to coincide with the start of the period of higher fertility, while females preferentially joined new groups several months before the onset of this period.

scholarly journals Abnormal pelage color in mantled howler monkey (Alouatta palliata mexicana) in Veracruz, México

2021 ◽  
Vol 2 (1) ◽  
pp. 26-28
Keyword(s):  
Alouatta Palliata ◽  
Howler Monkey ◽  
Mantled Howler ◽  
Pelage Color ◽  
Ad Libitum ◽  
Mantled Howler Monkey ◽  
Alouatta Palliata Mexicana

El leucismo es una despigmentación total o parcial del pelaje, mientras que el albinismo es la pérdida total de pigmentos en el cuerpo entero; las condiciones anormales de la carencia del pigmento se deben a la expresión de genes recesivos.  Se realizó una expedición ad libitum en el Ejido Álvaro Obregón, al suroeste de Nuevo Cantón, municipio de Uxpanapa, Veracruz en diciembre de 2019.  Presentamos el primer registro de un individuo de mono aullador de manto (Alouatta palliata mexicana) con coloración no convencional (probablemente leucismo o albinismo), observado en una tropa silvestre en la región del Valle de Uxpanapa, Veracruz, México.  La coloración de la mucosa oral y palpebral no muestran pigmentación y pueden ser resultado de la expresión de genes recesivos en el individuo, por lo que realizar estudios más profundos sobre la expresión de genes recesivos ampliaría la comprensión del fenómeno.

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