Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1080/21564574.2016.1146168 |
Wide variation in carapacial scute patterns in a natural population of speckled tortoises, Homopus signatus | |
Loehr, Victor J. T. | |
通讯作者 | Loehr, Victor J. T. |
来源期刊 | AFRICAN JOURNAL OF HERPETOLOGY |
ISSN | 2156-4574 |
EISSN | 2153-3660 |
出版年 | 2016 |
卷号 | 65期号:1页码:47-54 |
英文摘要 | The arrangement of scutes on the carapaces of extant chelonians is very similar among species, but intraspecific deviations from typical scute patterns are common. Because intraspecific variation may relate to inbreeding depression, unfavourable egg incubation conditions and the presence of environmental pollutants, investigations of carapacial scute patterns in natural populations can enhance insight into the ecologies and survival challenges of chelonians. A population of the tortoise Homopus signatus, inhabiting an arid range with substantial annual rainfall variation, was sampled to record carapacial scute patterns. The typical pattern of H. signatus consisted of five vertebral scutes, four pairs of costal scutes, a cervical and a supracaudal scute, and 12 pairs of marginal scutes. Although it was expected that size classes (i.e. representing tortoises born in different years) and sexes would have different percentages deviations from the typical scute pattern as a result of different egg incubation conditions, percentages were similar among size classes and sexes. A high percentage of 44% (25% if counts of the relatively variable marginal scutes were excluded) of all tortoises had deviant carapacial scute patterns. Since the study population was situated in a relatively pristine area and supernumerary carapacial scutes appear related to egg incubation conditions in other chelonians, the wide variation in carapacial scute patterns in wild H. signatus may be the result of frequently challenging incubation conditions in the species’ harsh environment. |
英文关键词 | Morphology Namaqualand Reptilia South Africa Testudinidae turtles |
类型 | Article |
语种 | 英语 |
国家 | Netherlands |
收录类别 | SCI-E |
WOS记录号 | WOS:000371670400001 |
WOS关键词 | CHRYSEMYS-PICTA ; TURTLES ; ABNORMALITIES ; SHELL ; NAMAQUALAND |
WOS类目 | Zoology |
WOS研究方向 | Zoology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/191041 |
作者单位 | Homopus Res Fdn, Kwikstaartpad 1, NL-3403 ZH Ijsselstein, Netherlands |
推荐引用方式 GB/T 7714 | Loehr, Victor J. T.. Wide variation in carapacial scute patterns in a natural population of speckled tortoises, Homopus signatus[J],2016,65(1):47-54. |
APA | Loehr, Victor J. T..(2016).Wide variation in carapacial scute patterns in a natural population of speckled tortoises, Homopus signatus.AFRICAN JOURNAL OF HERPETOLOGY,65(1),47-54. |
MLA | Loehr, Victor J. T.."Wide variation in carapacial scute patterns in a natural population of speckled tortoises, Homopus signatus".AFRICAN JOURNAL OF HERPETOLOGY 65.1(2016):47-54. |
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