Since the first long-term field study of mantled howler monkeys carried out by Clarence R. Carpen... more Since the first long-term field study of mantled howler monkeys carried out by Clarence R. Carpenter on Barro Colorado Island about 80 years ago, howler movement patterns and range use have been studied in several species and study sites throughout Mexico, Central, and South America. Howler monkeys often use small home ranges (<30 ha) and travel short distances each day (<1,000 m) compared with other atelines. Home range size, day range length, and patterns of use of space may vary both within- and between-species in response to differences in forest structure, patterns of resource distribution and phenology, the area of habitat available, group size, and population density. Within-species variability has been shown to increase with increasing sample size. In addition, howlers present a pattern of repetitive use of a limited number of routes to travel between feeding and sleeping sites that has been related to a strategy aimed at reducing the distance travelled while allowing them to keep track of the phenology of important food sources. In this chapter we present the results of a comprehensive review of the literature on the ranging behavior of Alouatta (spp.). We used Generalized Linear Models (GLMs) to test whether home range is affected by (1a) fragment size, (1b) population density, (1c) group size, and (1d) group biomass, and whether day range is affected by (2a) fragment size, (2b) population density, (2c) group size, and the contribution of (2d) fruits and (2e) leaves to the diet. We also included species and method of estimating home range as factors in the models. We found that the size of the home range is negatively influenced by population density, and that there are differences between species (A. palliata uses significantly larger home ranges), and estimating methods. We also found that the length of the day range is negatively affected by population density, and the contribution of fruits and leaves to the diet, but positively affected by group size. Interspecific comparisons showed that A. guariba clamitans tends to travel farther daily than A. palliata. Cognitively, recent evidence supports the idea that howler monkeys are capable of encoding, processing, updating, and recalling a topological spatial representation of a set of landmarks (including major feeding and resting sites) as prominent beacons for navigating along commonly used routes within their home ranges.
As frequentes alterações dos habitats naturais promovidas pelo ser humano aumentam sua proximidad... more As frequentes alterações dos habitats naturais promovidas pelo ser humano aumentam sua proximidade com a fauna silvestre e favorecem o surgimento de conflitos. Em anos recentes a empresa gestora da Usina Hidrelétrica Dona Francisca tem recebido queixas de moradores do entorno da usina sobre um suposto aumento da população de macacos-prego Sapajus nigritus (Goldfuss, 1809), os quais estariam provocando “prejuízos” em alguns cultivos agrícolas. Compreender as percepções e atitudes do ser humano com relação aos macacos-prego é importante para esclarecer os fatores sociais que intensificam os conflitos, bem como os que favorecem a coexistência entre ambos nessas áreas. O objetivo desse trabalho foi investigar as percepções e as atitudes de moradores dascomunidades rurais de Cerro Preto e Boa Esperança (Ibarama, RS), no entorno da barragem Dona Francisca, com relação aos macacos-prego, visando à identificação de conflitos e suas possíveis causas. O estudo foi realizado através de entrevi...
... the reproductive mode of the species recorded there depends on the presence of lentic water b... more ... the reproductive mode of the species recorded there depends on the presence of lentic water bodies (Haddad &amp;amp;amp; Sawaya 2000, Duellman &amp;amp;amp; ... Célio FB Haddad for providing unpublished lists of species; Gelson Campos, Adriana Branco, Eliara S. Müller, Fabiane Alves, Camile ...
... Codenotti, TL, V. M da Silva, V. J D. Albuquerque, EV Camargo, and R. M M. Silveira. 2002. ..... more ... Codenotti, TL, V. M da Silva, V. J D. Albuquerque, EV Camargo, and R. M M. Silveira. 2002. ... Juliana Arpini, Curso de Pós-Graduação Lato Sensu em Diagnóstico Ambiental e Recuperação de Áreas Degradadas, Universidade Comunitária Regional de Chapecó. ...
Since the first long-term field study of mantled howler monkeys carried out by Clarence R. Carpen... more Since the first long-term field study of mantled howler monkeys carried out by Clarence R. Carpenter on Barro Colorado Island about 80 years ago, howler movement patterns and range use have been studied in several species and study sites throughout Mexico, Central, and South America. Howler monkeys often use small home ranges (<30 ha) and travel short distances each day (<1,000 m) compared with other atelines. Home range size, day range length, and patterns of use of space may vary both within- and between-species in response to differences in forest structure, patterns of resource distribution and phenology, the area of habitat available, group size, and population density. Within-species variability has been shown to increase with increasing sample size. In addition, howlers present a pattern of repetitive use of a limited number of routes to travel between feeding and sleeping sites that has been related to a strategy aimed at reducing the distance travelled while allowing them to keep track of the phenology of important food sources. In this chapter we present the results of a comprehensive review of the literature on the ranging behavior of Alouatta (spp.). We used Generalized Linear Models (GLMs) to test whether home range is affected by (1a) fragment size, (1b) population density, (1c) group size, and (1d) group biomass, and whether day range is affected by (2a) fragment size, (2b) population density, (2c) group size, and the contribution of (2d) fruits and (2e) leaves to the diet. We also included species and method of estimating home range as factors in the models. We found that the size of the home range is negatively influenced by population density, and that there are differences between species (A. palliata uses significantly larger home ranges), and estimating methods. We also found that the length of the day range is negatively affected by population density, and the contribution of fruits and leaves to the diet, but positively affected by group size. Interspecific comparisons showed that A. guariba clamitans tends to travel farther daily than A. palliata. Cognitively, recent evidence supports the idea that howler monkeys are capable of encoding, processing, updating, and recalling a topological spatial representation of a set of landmarks (including major feeding and resting sites) as prominent beacons for navigating along commonly used routes within their home ranges.
As frequentes alterações dos habitats naturais promovidas pelo ser humano aumentam sua proximidad... more As frequentes alterações dos habitats naturais promovidas pelo ser humano aumentam sua proximidade com a fauna silvestre e favorecem o surgimento de conflitos. Em anos recentes a empresa gestora da Usina Hidrelétrica Dona Francisca tem recebido queixas de moradores do entorno da usina sobre um suposto aumento da população de macacos-prego Sapajus nigritus (Goldfuss, 1809), os quais estariam provocando “prejuízos” em alguns cultivos agrícolas. Compreender as percepções e atitudes do ser humano com relação aos macacos-prego é importante para esclarecer os fatores sociais que intensificam os conflitos, bem como os que favorecem a coexistência entre ambos nessas áreas. O objetivo desse trabalho foi investigar as percepções e as atitudes de moradores dascomunidades rurais de Cerro Preto e Boa Esperança (Ibarama, RS), no entorno da barragem Dona Francisca, com relação aos macacos-prego, visando à identificação de conflitos e suas possíveis causas. O estudo foi realizado através de entrevi...
... the reproductive mode of the species recorded there depends on the presence of lentic water b... more ... the reproductive mode of the species recorded there depends on the presence of lentic water bodies (Haddad &amp;amp;amp; Sawaya 2000, Duellman &amp;amp;amp; ... Célio FB Haddad for providing unpublished lists of species; Gelson Campos, Adriana Branco, Eliara S. Müller, Fabiane Alves, Camile ...
... Codenotti, TL, V. M da Silva, V. J D. Albuquerque, EV Camargo, and R. M M. Silveira. 2002. ..... more ... Codenotti, TL, V. M da Silva, V. J D. Albuquerque, EV Camargo, and R. M M. Silveira. 2002. ... Juliana Arpini, Curso de Pós-Graduação Lato Sensu em Diagnóstico Ambiental e Recuperação de Áreas Degradadas, Universidade Comunitária Regional de Chapecó. ...
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