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《Journal of Natural History》2012,46(6):1617-1627
Cape girdled lizards Cordylus cordylus are social and territorial. Behaviour observed in captivity revealed at least 24 distinct postures and displays. Thermoregulatory behaviour was the most frequent of all behaviours observed (66·7%). Of the social behaviours, aggression was observed most frequently (72·1%). Six behavioural postures are not known to have been described before. This species has no bright colours or contrasting markings to use in displays to conspecifics. 相似文献
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《Journal of Natural History》2012,46(17):2119-2149
Surveys of the amphibians and reptiles on Nosy Be (an island off north-west Madagascar) and nearby islands were undertaken between 1991 and 2001 and are discussed here in view of biodiversity considerations and conservation efforts. Since Nosy Be is the type locality of several amphibian and reptile taxa, their exact status is of crucial importance for the nomenclatural stability of many groups of the Madagascan herpetofauna. A total of 20 amphibian and 61 reptile species (excluding marine reptiles) was confirmed for this archipelago. Other species (Mantidactylus horridus, Androngo elongatus, Typhlops madagascariensis, T. reuteri, Micropisthodon ochraceus and Pararhadinea melanogaster) were not found during these inventories, but are quoted in the literature or housed in herpetological collections, and are considered as likely to be present at Nosy Be. A further 18 taxa are tentatively excluded from its fauna, due to biogeographic incongruence and/or lack of reliable voucher specimens. Few taxa are so far only known from the island; they may represent endemics or may have been overlooked on the adjacent mainland. They are respectively Stumpffia pygmaea, Mabuya lavarambo, Lygodactylus h. heterurus, Lycodryas granuliceps and Typhlops reuteri. Heterixalus tricolor too is likely to be present on Nosy Be only, but the difference with respect to taxa present on the mainland needs to be confirmed. Several species are known from nearby islands and islets surveyed (11 amphibians and 26 reptiles). A few of them (Heterixalus 'variabilis', Kinixys belliana, Furcifer oustaleti, Mabuya comorensis, Paracontias milloti) are present on some of these islands but have not yet been found on Nosy Be. Much of the field research was conducted at Lokobe, a strict nature reserve still characterized by good forest coverage (typical of the Sambirano Domain), and an important area of biodiversity. With 15 amphibian and 45 reptile species, Lokobe hosts 81% of the overall Nosy Be herpetofauna: of the species found during our surveys, only Heterixalus tricolor, Hoplobatrachus tigerinus, Gehyra mutilata, Phelsuma dubia and Crocodylus niloticus were only found outside the reserve. In view of this, the protection of Lokobe should be assured and reinforced. Except for Lokobe, habitats on Nosy Be are largely anthropogenic, and have a lower species diversity, especially where there is intensive agriculture. At other sites (e.g. ylang-ylang and coffee plantations) and in forested bands along roads, species diversity is still high: careful management of these anthropogenic habitats might also assure the survivorship and conservation of a diverse herpetofauna outside the protected area. 相似文献
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中国石龙子头、体大小的性二态 总被引:16,自引:0,他引:16
计翔 《杭州师范学院学报(社会科学版)》1994,(6)
本文研究中国石龙子(Eumeceschinensis)头、体大小的性二态。成雄体长和体重略大于成雌,但在统计上无明显差异。雌雄亚成体相对头长,相对头宽和相对头高无显著差异。成雄相对头长、相对头宽和相对头高显著大于成雌和亚成体。亚成体相对头长、相对头宽和相对头高与成雌无显著差异。雄性性成熟后头部的生长显著大子雌性。 相似文献
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M. Capula 《Cellular and molecular life sciences : CMLS》1994,50(7):691-696
Allozyme electrophoresis was used to study the genetic variability (proportion of polymorphic loci and heterozygosity) in insular populations (Corsica, Elba, Montecristo, Marettimo, Pantelleria) of the lacertid lizardPodarcis sicula. These populations were presumed to have originated from episodes of accidental anthropogenic introduction. In order to test the hypothesis of a man-aided colonization and to provide comparative data, heterozygosity and polymorphism were also estimated in autochthonous populations ofP. sicula from the Italian peninsula and Sicily. In each case, the presumed introduced population showed levels of genetic variability significantly lower than those detected in the autochthonous ones. Very little genetic differentiation was found among native and presumed colonist populations, Nei's standard genetic distances ranging from 0.001 to 0.009. These results strongly support the hypothesis thatP. sicula was only recently introduced to the studied islands, and provide additional evidence of reduced genetic variability due to founder effect in insular populations originating from episodes of human transportation. 相似文献
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云南省东北部两栖爬行动物调查 总被引:1,自引:1,他引:0
本文报告了云南东北部两栖爬行动物组成,垂直分布,与邻近地区的相似性.提出我国两栖动物地理区划中的华中区与西南区在该地的界线应以乌蒙山分水岭为界. 相似文献
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Karyotype of a gekkonid lizard,Eublepharis kuroiwae kuroiwae 总被引:1,自引:0,他引:1
H. Ota M. Matsui T. Hikida S. Tanaka 《Cellular and molecular life sciences : CMLS》1987,43(8):924-925
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温度对多疣壁虎摄食量和同化效率的影响 总被引:9,自引:0,他引:9
环境温度对多疣壁虎(Gekko japonicus)平均日摄食量有显著的影响。当温度低于13℃时,动物不再进食,无粪尿排出。在实验温度范围内,平均日摄食量和温度成正相关,繁殖期和秋冬季动物平均日摄食量(Y(J/g.day))和温度(T(℃))之间关系的线性回归方程分别为Y=-1179.79+59.38T和Y=-396.94+31.10T。除30℃温度外,同一温度平均日摄食量的季节性差异不显著。繁殖期和秋冬季,多疣壁虎均在23℃温度的同化效率最高,与30℃温度之间有显著的差异,23℃温度与其他温度,以及其他温度之间同化效率的差异不显著。秋冬季多疣壁虎各温度中的同化效率显著地高于繁殖期相应温度中的同化效率。不同季节粪尿能值无显著差异。 相似文献