The Influence of Spatial Attributes on Fragment Occupancy and Population Structure in the Mexican Mantled Howler (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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Digestive strategies and food choice in mantled howler monkeys Alouatta palliata mexicana: bases of their dietary flexibility

Journal of Comparative Physiology B ◽

10.1007/s00360-013-0769-9 ◽

2013 ◽

Vol 183 (8) ◽

pp. 1089-1100 ◽

Cited By ~ 14

Author(s):

Fabiola Espinosa-Gómez ◽

Sergio Gómez-Rosales ◽

Ian R. Wallis ◽

Domingo Canales-Espinosa ◽

Laura Hernández-Salazar

Keyword(s):

Food Choice ◽

Alouatta Palliata ◽

Howler Monkeys ◽

Dietary Flexibility ◽

Mantled Howler ◽

Mantled Howler Monkeys ◽

Alouatta Palliata Mexicana

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

Oryx ◽

10.1017/s0030605302000480 ◽

2002 ◽

Vol 36 (3) ◽

pp. 266-271 ◽

Cited By ~ 26

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.

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