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| Luiselli, Luca. |
| Three species of hinge-back tortoises ( (Kinixys belliana nogueyi, Kinixys erosa, Kinixys homeana) are found in simpatry in the rainforests of the Niger Delta, southern Nigeria (west Africa). The seasonal activity patterns and food habits of these tortoises are studied in the present paper. K. erosa and K. homeana have similar activity patterns, with peaks occurring during the wet season. Kinixys belliana was found only during the wet months. There was no evidence of any specific effect of humidity of the air on their activity intensity, and it seems likely that, more than absolute values of air humidity, the crucial factor to force tortoises into high activity is the sudden change between dry days and very wet days at the onset of the rainy season (end of... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Tortoises; Kinixys belliana nogueyi; Kinixys erosa; Kinixys homeana; Food niche; Niger Delta; Nigeria. |
| Ano: 2003 |
URL: http://www.repository.naturalis.nl/record/534368 |
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| Akani, Godfrey C.; Luiselli, Luca. |
| The ecology of the water snake, Grayia smythii (Reptilia: Colubridae) occurring in a seasonal rainforest swamp of the Niger Delta (southern Nigeria) was investigated between December 1998 and March 2000. Females and males were similar in body sizes (SVL) and head sizes, but males had tails significantly longer than females. The diet was constituted only by frogs and fish. The major prey type was Xenopus tropicalis, followed by Tilapia sp. and Clarias sp. Adult sex-ratio was 1:1. Sloughing of skin and ovipositions occurred in dry season, in the humid enclosure of buttress roots amongst leaf litters. Fecundity ranged from 8 to 14 eggs per female, with a mean of 10 eggs (SD = 1.8). The smallest gravid female was 78.2 cm SVL. Eggs were laid in batches of three... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Grayia smythii Colubridae snakes; Ecology Nigeria. |
| Ano: 2001 |
URL: http://www.repository.naturalis.nl/record/534316 |
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| Luiselli, Luca; Angelici, Francesco M.; Akani, Godfrey C.. |
| Several aspects of the ecology of Jameson’s green mamba Dendroaspis jamesoni jamesoni (Traill, 1843), a large-sized arboreal elapid snake, are studied in southern Nigeria. This species 18 common and widespread in the region studied. On the basis of the analysis of both the habitats of capture of the various specimens and the results of a logistical regression model, it seems that this species inhabits a wide variety of habitats (including secondary forest patches and the plantation-forest mosaic), and that its local distribution is not influenced by the Presence of any macrohabitat parameter. Green mambas were observed both in the dry and in the wet season, without any statistical bias toward a particular season. Adult sex-ratio was aPproximately 1 : 1.... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Elapidae; Snakes; Ecology; Nigeria. |
| Ano: 2000 |
URL: http://www.repository.naturalis.nl/record/534327 |
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