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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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