ABSTRACT The remaining West African giraffes (Giraffa camelopardalis) are found in Niger (62 indi... more ABSTRACT The remaining West African giraffes (Giraffa camelopardalis) are found in Niger (62 individuals in January 1998). Their feeding behaviour was studied by direct observation during two periods of 6 and 12 mo. The giraffe's diet is diverse : at least 45 plant species were eaten, depending on spatial arrangement and a given plant's stage of growth. Time spent browsing during the dry season was twice that devoted to browsing during the rainy season (46 and 23 % respectively). Time spent feeding on a plant was correlated with the total time spent feeding on this species. Giraffe browsed at a level which domestic animals cannot reach usually, between two and four metres for females and juveniles and between four and five metres for adult males. The total browsing time on a species was not correlated with its occurrence in the field. The small number of giraffes, the diversity of their diet and the lack of competition with domestic animals indicate a weak impact of the giraffe on the vegetation and the possibility for the population to increase in this area. Giraffe are located in an area with a strong human presence and they feed on species used daily by the rural communities. This brings to light the close link existing between communities living in the same environment. The acknowledgement of that link requires the consideration of ecological factors in their relationship with regional economic expansion programs.
Abstract Hunting, although prohibited, is widely prac-ticed by the rural inhabitants settled alon... more Abstract Hunting, although prohibited, is widely prac-ticed by the rural inhabitants settled along the Tran-samazon highway. In 1997 and 2000, we investigated subsistence hunting in Uruara´, a township located on an Amazonian pioneer front (Brazil). We analyze hunting ...
Base de dados : LILACS. Pesquisa : 345422 [Identificador único]. Referências encontradas : 1 [ref... more Base de dados : LILACS. Pesquisa : 345422 [Identificador único]. Referências encontradas : 1 [refinar]. Mostrando: 1 .. 1 no formato [Detalhado]. página 1 de 1, 1 / 1, LILACS, seleciona. para imprimir. Fotocópia. Texto completo SciELO Brasil. Pontes, Fernando Augusto Ramos. ...
The fact that sexual segregation can occur in wild ruminants independently of sex-related differe... more The fact that sexual segregation can occur in wild ruminants independently of sex-related differences in habitat use suggests that it results at least partly from social mechanisms. One of the simplest mechanisms which can be hypothesised is that individuals avoid the congener classes which frequently try to interact with them (be these interactions 'agonistic' or 'sexual', since courtship behaviour components typically induce withdrawal when performed outside the rut). The aim of the present study was to test, in mouflon sheep (Ovis gmelini), whether the age-sex classes which exchange frequent interactions on meeting occur rarely inside the same groups. Observations were made during winter, on a small population in Germany. Interactions were recorded at an attractive site where all age-sex classes met daily. Foot transects were conducted in parallel over the whole study area in order to determine group composition. As expected, adults of different sexes exchanged fr...
Page 1. variations of forage resources lead to a natural season of calving from December to March... more Page 1. variations of forage resources lead to a natural season of calving from December to March, when savannahs are green and the grass is of good quality. The mating season extends from mid-February to June, with several males in the herd. ...
ABSTRACT The remaining West African giraffes (Giraffa camelopardalis) are found in Niger (62 indi... more ABSTRACT The remaining West African giraffes (Giraffa camelopardalis) are found in Niger (62 individuals in January 1998). Their feeding behaviour was studied by direct observation during two periods of 6 and 12 mo. The giraffe's diet is diverse : at least 45 plant species were eaten, depending on spatial arrangement and a given plant's stage of growth. Time spent browsing during the dry season was twice that devoted to browsing during the rainy season (46 and 23 % respectively). Time spent feeding on a plant was correlated with the total time spent feeding on this species. Giraffe browsed at a level which domestic animals cannot reach usually, between two and four metres for females and juveniles and between four and five metres for adult males. The total browsing time on a species was not correlated with its occurrence in the field. The small number of giraffes, the diversity of their diet and the lack of competition with domestic animals indicate a weak impact of the giraffe on the vegetation and the possibility for the population to increase in this area. Giraffe are located in an area with a strong human presence and they feed on species used daily by the rural communities. This brings to light the close link existing between communities living in the same environment. The acknowledgement of that link requires the consideration of ecological factors in their relationship with regional economic expansion programs.
Abstract Hunting, although prohibited, is widely prac-ticed by the rural inhabitants settled alon... more Abstract Hunting, although prohibited, is widely prac-ticed by the rural inhabitants settled along the Tran-samazon highway. In 1997 and 2000, we investigated subsistence hunting in Uruara´, a township located on an Amazonian pioneer front (Brazil). We analyze hunting ...
Base de dados : LILACS. Pesquisa : 345422 [Identificador único]. Referências encontradas : 1 [ref... more Base de dados : LILACS. Pesquisa : 345422 [Identificador único]. Referências encontradas : 1 [refinar]. Mostrando: 1 .. 1 no formato [Detalhado]. página 1 de 1, 1 / 1, LILACS, seleciona. para imprimir. Fotocópia. Texto completo SciELO Brasil. Pontes, Fernando Augusto Ramos. ...
The fact that sexual segregation can occur in wild ruminants independently of sex-related differe... more The fact that sexual segregation can occur in wild ruminants independently of sex-related differences in habitat use suggests that it results at least partly from social mechanisms. One of the simplest mechanisms which can be hypothesised is that individuals avoid the congener classes which frequently try to interact with them (be these interactions 'agonistic' or 'sexual', since courtship behaviour components typically induce withdrawal when performed outside the rut). The aim of the present study was to test, in mouflon sheep (Ovis gmelini), whether the age-sex classes which exchange frequent interactions on meeting occur rarely inside the same groups. Observations were made during winter, on a small population in Germany. Interactions were recorded at an attractive site where all age-sex classes met daily. Foot transects were conducted in parallel over the whole study area in order to determine group composition. As expected, adults of different sexes exchanged fr...
Page 1. variations of forage resources lead to a natural season of calving from December to March... more Page 1. variations of forage resources lead to a natural season of calving from December to March, when savannahs are green and the grass is of good quality. The mating season extends from mid-February to June, with several males in the herd. ...
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