Habitat use and diet of the endemic lizard Ameivula nigrigula (Squamata: Teiidae) in Caatinga domain,Northeastern Brazil

ABSTRACT

The lizard Ameivula nigrigula is endemic to Caatinga vegetation and the transition zone between the Caatinga and Cerrado domains in Brazil. It was recently described, but little is known about its biology. We analysed microhabitat use and the diet of this species in Caatinga vegetation in Santo Inácio, Bahia State. Its diet consisted mainly of arthropods and plant material, and in particular aggregate (e.g. termites) and large preys (e.g. Coleoptera, insect larvae and spiders), reflecting their nutritional and energy values and high water contents. With regard to habitat use, we found A. nigrigula using microhabitats with tall vegetation over accumulated leaf litter, which could potentially contribute to temperature regulation. Together, those characteristics contribute to the survival of lizards in environments with low water availability and high temperatures, such as the Caatinga domain.     

基于读者阅读习惯改变的高职院校图书馆服务模式探讨

针对高职院校图书馆的现状、学生特点及阅读习惯的改变,提出高职院校图书馆应转变现有的服务模式,提高图书馆的利用率。     

江苏省跳水队运动员饮食习惯调查与分析

目的:为了解我省跳水运动员饮食习惯,指导运动员合理、平衡膳食提供依据,对我省跳水队25名运动员进行饮食习惯调查。方法:通过问卷调查会员饮食结构进行分析。结果表明:我省跳水运动员大部分早餐习惯较好:蛋类、奶制品、豆制品;肉类制品中水产品摄入相对较少,蔬菜摄入比较充足;大部分运动员每天吃水果,但摄入的量不足;运动后补液不合理,应提倡运动后多补充运动饮料。     

晚清报刊媒介对移风易俗运动的推动——以戊戌维新时期的《湘报》为例

湖南维新派创办的《湘报》，通过刊载抨击缠足、吸食鸦片等恶风陋俗之害的文章进行舆论引导，还发布风俗改良团体成立的各种告示，报道各地移风易俗的相关情况，从言论、组织等方面有效推动了湖南移风易俗运动的开展。《湘报》凭借其较大的发行量，扩大了移风易俗的影响范围，在当时湖南产生了一定的影响。     

An Early Cretaceous anomopod (Crustacea: Branchiopoda) preserved in amber that reveals an unexpected venture during the evolution of the order

An anomopod branchiopod crustacean that displays many structural similarities to the extant genera Scapholeberis and Megafenestra (family Daphniidae), fortuitously preserved in amber of Early Cretaceous age, is described. Although most of its appendages have been lost, preservation of several structures is vastly better than in most ‘orthodox’ fossils of these delicate animals. The well-preserved carapace suggests that, like extant representatives of these genera, but in no other daphniid, the animal exploited the surface film, beneath which it suspended itself by means of the straight ventral margins of its functionally bivalved carapace, each of which was armed with a row of close-set setae. Unlike the postabdomen of all the many extant anomopods, which is unsegmented, that of the fossil species, which was well preserved, was segmented; its distal half, or rather more, being clearly divided into four segments. Its topographically ventral margin was armed with pairs of very long spines (relatively longer than in any extant species), and the paired, hook-like terminal spines, clearly homologous with the claws of living species, were modified in a way that has no exact parallel in extant forms. The distal segment shows signs of annulations and may have had slight independent mobility. It is suggested that the long ventral spines of the postabdomen facilitated levering the animal forward over soft substrata. Its minute size reflects the fact that it is a first instar. Moreover, it was possibly squeezed out of the brood pouch prematurely when its parent became trapped in resin. The difficulty of assigning a place to the fossil in the phylogeny of the anomopods, all of which, including fossil forms of greater antiquity, have an unsegmented postabdomen, is briefly noted. The possibility that this attribute represents a very ancient atavism is tentatively suggested.     

中国西北地区生态环境的演变及治理策略

西北地区是我国生态环境最脆弱的地区.为了顺利发展西北地区经济,探讨了西北地区生态环境的演变,客观分析了西北生态逐步恶化的原因,进而提出了开发西北必须以生态建设为重点的可持续发展战略.     

中国龙虾雌性繁殖习性的初步研究

研究表明：中国龙虾雌雄异体,性比约为2：1,生物学最小为头胞甲长8．4cm左右。根据其卵巢组织学观察、相对头胸甲宽度、相对腹部宽度、卵巢因子及卵巢成熟度系数系,将中国龙虾的卵巢分为如下6期：未发育期、发育早期、发育期、将成熟期、成熟期和恢复期。     

商城产合征姬蛙(Microhyla mixtura)的食性分析

对商城合征姬蛙的食性进行初步分析,结果表明,该成蛙主要捕食昆虫等动物性食物,其中以鞘翅目、膜翅目昆虫为主,有益系数达95.08%.     

蜥蜴亚目5种动物视网膜结构的观察比较

为探讨蜥蜴亚目视网膜结构与生活习性的关系，用光镜观察了北草蜥(Takydromus septentrionalis)、丽斑麻蜥(Eremias argus)、铜蜥(Lygosoma indicum)、无蹼壁虎(Gekko swinhonis)和耳疣壁虎(Gekko auriverrucosus)视网膜的结构，测量各层厚度、3个核层的胞核层数及胞核直径。经统计、比较和分析，结果表明，昼行性的北草蜥、丽斑麻蜥和铜蜥的视网膜结构相似，而夜行性或晨昏性活动的两种壁虎视网膜结构相似，显示了蜥蜴亚目视网膜结构和机能与各自的生活习性的一致性。其中，北草蜥视盘的基部有栉膜伸入玻璃体。