oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Search Results: 1 - 10 of 12 matches for " Lacertidae "
All listed articles are free for downloading (OA Articles)
Page 1 /12
Display every page Item
New finds of lacertids (Sauria, Lacertidae) from the Neogene of Slovakia and Czech Republic
Andrej ?erňansky,Peter Joniak
Acta Geologica Slovaca , 2009,
Abstract: In the present paper, first finds of fossil lacertids from the Neogene of Slovakia and new finds from Czech Republic are described. The material comes from three localities: Merkur - North (Czech Republic, Early Miocene), Borsky Sv ty Jur (Slovakia, Late Miocene) and Ivanovce (Slovakia, Early Pliocene), and consists of several isolated dentaries, maxillae and one vertebra. According to the morphology, the find of dentary from the Ivanovce locality can be attributed to Lacerta cf. agilis. Except one vertebra, the rest of the material can be assigned to Lacerta sp. The fragment of the anterior portion of the dentary from the Upper Miocene sediments of Borsky Sv ty Jur represents the oldest known occurrence of this taxon in Slovakia. Thus, the material enhances our rather poor knowledge of the paleoherpetofauna from the Slovakian territory.
Preliminary Data on Age Estimation and Body Size of the Dwarf Lizard, Parvilacerta parva (Boulenger, 1887) (Reptilia: Lacertilia) from Ak ehir, Konya (Turkey)
Batuhan Yaman Yakin,Mert Gürkan,Sibel Hayretda?,Cemal Varol Tok
Ecologia Balkanica , 2012,
Abstract: In this study, age determination was done by using the skeletochronology method on Ak ehir, Konya (Turkey), 14 (5♂♂; 9♀♀) Parvilacerta parva specimens. Cross-sections of femurs were examined in total 14 individuals, the lowest number of LAGs was seen in one female and one male individuals as 4, the highest number of LAGs were seen in two female individuals as 8. Average SVL was found 50.8 mm (SD=2.27) in male individuals, and 53.1 mm (SD = 3.27) in females. For all the samples, the age-length equation was calculated as SVL (mm) = 37.82 + (2.47 * age). As a result of Pearson correlation analysis, a significant positive correlation (r=0.93, P 0.01) between age and SVL. Pileus length does not increase constantly with age (r=0.007, P=0.98), while pileus width increases normally together with age (r=0.212, P=0.46).
Helminths of seven species of lacertid lizards from southern Africa
Stephen R. Goldberg,Charles R. Bursey
African Zoology , 2011,
Abstract: Two hundred and forty five lacertid lizards representing seven species (Heliobolus lugubris, Ichnotropis squamulosa, Meroles anchietae, M. cuneirostris, M. suborbitalis, Pedioplanis lineoocellata, P. namaquensis) from southern Africa were examined for helminths. Adults of one species of cestode, Oochoristica ubelakeri, and four species of nematodes, Maxvachonia dimorpha, Parapharyngodon rotundatus, Spauligodon smithi, Thubunaea fitzsimonsi and metacestodes of a cyclophyllid cestode, the nematodes, Abbreviata sp. and an undetermined ascarid species, and an acanthocephalan species (as cystacanths) were found. Mean helminth species richness for adult helminths was 2.4 ± 1.3 S.D. (range = 1–4 per host species).
Reproductive cycle of the Namaqua sand lizard, Pedioplanis namaquensis (Squamata: Lacertidae), from southern Africa
Stephen R. Goldberg
African Zoology , 2011,
Abstract: The reproductive cycle of the Namaqua sand lizard,Pedioplanis namaquensis, from southern Africa is described from histological examination of gonadal material from museum specimens. Males followed a seasonal testicular cycle in which sperm was produced in January–March and September–December. Testes in regression were present in March and May. Females with enlarged ovarian follicles (>4 mm length) or oviductal eggs were collected between November and February. Clutch size for 14 females was 3.8 ± 0.97 S.D. eggs, range 3–5. Histological evidence is presented that two clutches may be produced in the same reproductive season.
Extreme genetic diversity in the lizard Atlantolacerta andreanskyi (Werner, 1929): A montane cryptic species complex
Barata Mafalda,Carranza Salvador,Harris D
BMC Evolutionary Biology , 2012, DOI: 10.1186/1471-2148-12-167
Abstract: Background Atlantolacerta andreanskyi is an enigmatic lacertid lizard that, according to the most recent molecular analyses, belongs to the tribe Eremiadini, family Lacertidae. It is a mountain specialist, restricted to areas above 2400 m of the High Atlas Mountains of Morocco with apparently no connection between the different populations. In order to investigate its phylogeography, 92 specimens of A. andreanskyi were analyzed from eight different populations across the distribution range of the species for up to 1108 base pairs of mitochondrial DNA (12S, ND4 and flanking tRNA-His) and 2585 base pairs of nuclear DNA including five loci (PDC, ACM4, C-MOS, RAG1, MC1R). Results The results obtained with both concatenated and coalescent approaches and clustering methods, clearly show that all the populations analyzed present a very high level of genetic differentiation for the mitochondrial markers used and are also generally differentiated at the nuclear level. Conclusions These results indicate that A. andreanskyi is an additional example of a montane species complex.
Sexual size dimorphism and female reproduction in the white-striped grass lizard Takydromus wolteri
Laigao LUO, Yilian WU, Zhuyuan ZHANG, Xuefeng XU
Current Zoology , 2012,
Abstract: Sexual size dimorphism (SSD) has long attracted the attention of biologists, and life-history variation is thought to play an important role in the evolution of SSD. Here we quantified SSD and female reproductive traits to identify potential associations between SSD and female reproduction in the white-striped grass lizard Takydromus wolteri. In a population from Chuzhou, China, the largest male and female were 53.0 mm and 57.5 mm in snout-vent length (SVL), respectively. Females were larger in SVL and abdomen length, whereas males were larger in head size and tail length. Females produced up to five clutches of eggs during the breeding season, with large females producing more clutches and more eggs per clutch than small ones. As a result, large females had a higher annual fecundity and reproductive output. Egg size was positively correlated with maternal SVL in the first clutch, but not in subsequent clutches. These results suggest that T. wolteri is a species with female-biased SSD, and that fecundity selection, in which large females have higher fecundity due to their higher capacity for laying eggs, is likely correlated with the evolution of SSD in this species [Current Zoology 58 (2): 236-243, 2012].
Anaplasmataceae and Borrelia burgdorferi sensu lato in the sand lizard Lacerta agilis and co-infection of these bacteria in hosted Ixodes ricinus ticks
Anna Ekner, Krzysztof Dudek, Zofia Sajkowska, Viktória Majláthová, Igor Majláth, Piotr Tryjanowski
Parasites & Vectors , 2011, DOI: 10.1186/1756-3305-4-182
Abstract: The current study showed that 23 of 171 examined sand lizards Lacerta agilis were PCR positive for Anaplasmataceae. The nucleotide sequences of the several selected PCR products showed 100% homology with Anaplasma spp. found in Ixodes ricinus collected in Tunisia and Morocco (AY672415 - AY672420). 1.2% of lizard collar scale samples were PCR positive for B. lusitaniae. In addition, 12 of 290 examined I. ricinus were PCR positive for B. burgdorferi s.l. and 82 were PCR positive for Anaplasmatacea. The number of ticks per lizard and the number of ticks PCR positive for both microorganisms per lizard were strongly correlated. Moreover, we found a significant correlation between numbers of ticks infected with Anaplasmataceae and with B. burgdorferi s.l. living on the same lizard. However, there was no significant correlation between detection of both bacteria in the same tick.To the best of our knowledge, this is the first report of Anaplasmataceae DNA and additionally the second report of B. burgdorferi s.l DNA detection in the sand lizard.One of the most widespread bacterium transmitted by ticks is Borrelia burgdorferi s. l., an agent of Lyme borreliosis [1,2]. Reservoirs of B. burgdorferi s.l. are vertebrates and special associations between Borrelia strains and particular groups of vertebrate hosts have been reported [3]. B. lusitaniae was the most common strain detected in lizard species and in ticks feeding on them [4-6].Ticks are the main vector of other microorganisms, such as intracellular bacteria from the family Anaplasmataceae [7,8], which attract the attention of public health professionals worldwide. One of the most important species of this family is Anaplasma phagocytophilum which causes human anaplasmosis (HA), formerly known as a human granulocytic ehrlichiosis (HGE) [9,10]. A. phagocytophilum is an obligate intracellular bacterium infecting the neutrophils of various mammalian species [9]. Anaplasmataceae are maintained in nature by transmission betwe
Ultrastructure of the Spermatozoon of the Northern Grass Lizard (Takydromus septentrionalis) with Comments on the Variability of Sperm Morphology Among Lizard Taxa
北草蜥精子的超微结构——兼评不同类群蜥蜴精子形态的差异

ZHANG Yong-pu,YING Xue-ping,JI Xiang,
张永普
,应雪萍,计翔

动物学研究 , 2005,
Abstract: We studied the ultrastructure of the spermatozoon of northern grass lizards ( Takydromus septentrionalis , n = 5) collected in April 2003 from a population in Wenzhou, Zhejiang, eastern China. The mature spermatozoa are characterized by: A circular acrosome; an acrosomal vesicle divided into cortex and medulla; the unilateral ridge of the acrosome vesicle divided into cortex and medulla, the electron-lucent zone between them; a prenuclear perforatorium, absence of the perforatorium base plate; presence of the subacrosomal space; an elongated nucleus, absence of a endonuclear canal; absence of epinuclear lucent zone; rounded nuclear shoulders. A bilateral stratified laminar structure within the neck region. A short midpiece; absence of multilaminar membranes; in longitudinal section, two tiers of mitochondria, in transverse section, six mitochondria with linear cristae; the presence of two dense body groups, the ring structure consisting of the complete ring; the arrangement pattern of the ring structure and mitochondria in rsl/mil and rs2/mi2; a fibrous sheath in the midpiece; presence of an annulus. A thin granular zone of cytoplasm at the anterior portion of the principal piece; the enlarged fiber 3 and fiber 8 disappearing at the anterior portion of the principal piece; the axoneme complex having an usual 9 + 2 pattern. Within lacertid lizards, sperms differ among species in the number of mitochondria, but in all species studied so far, there are two groups of dense bodies. However, lizards of different taxa differ, in various degrees, in such sperm morphological traits as acrosome vesicle, subacrosomal space, epinuclear lucent zone, perforatorium base plate, nuclear shoulder and number and arrangement of mitochondria and dense bodies. These differences suggest that sperm morphology provides additional information which one may use to study the phylogeny of lizards.
Does diet in lacertid lizards reflect prey availability? Evidence for selective predation in the Aeolian wall lizard, Podarcis raffonei (Mertens, 1952) (Reptilia, Lacertidae)
Pietro Lo Cascio
Biodiversity Journal , 2011,
Abstract: In this paper the invertebrate fauna occurring on Scoglio Faraglione, a tiny Aeolian island (AeolianArchipelago, NE Sicily) inhabited by a population of the critically endangered lacertid lizard Podarcis raffonei(Mertens, 1952), was censused at different seasons and the resulting data were then compared with dataobtained analysing prey composition and prey abundance in the diet of the lizards occurring on the same islet.The diet of Podarcis raffonei was mainly based on insects and other arthropods. The results indicate that dietcomposition is not directly influenced by prey availability and temporal prey abundance, and that there isstrong evidence indicating selective predation. Lizards prey upon a number of arthropod categories fewer thanthat recorded in field. Some invertebrate taxa (e.g. Diptera and Gastropoda) are really less attractive for lizardsand are rarely preyed or not preyed at all despite their spatial and/or temporal abundance. This suggests thatPodarcis raffonei is able to operate a hierarchical choice within the range of prey items constituting its preyspectrum, probably through the ability to discriminate between prey chemicals or visually oriented predation.
The importance of habitat resistance for movement decisions in the common lizard, Lacerta vivipara
Zajitschek Susanne RK,Zajitschek Felix,Clobert Jean
BMC Ecology , 2012, DOI: 10.1186/1472-6785-12-13
Abstract: Background Movement behaviour can be influenced by a multitude of biotic and abiotic factors. Here, we investigate the speed of movement in relation to environmental and individual phenotypic properties in subadult common lizards (Lacerta vivipara). We aim to disentangle the importance of substrate, cover, humidity, basking opportunity and individual phenotype on moving tendencies in 12 treatment combinations, at which each lizard was tested. Results We find that movement behaviour depends on the starting conditions, the physical properties of the dispersal corridor, and on the individuals’ phenotype. Specifically, the presence of cover and substrate providing suitable traction in the corridor had positive effects on individual movement decisions. Additionally, we find high phenotypic variation in the propensity to move dependent on the presence of cover. Individual back patterns also strongly affected movement decisions in interaction with the physical properties of the dispersal corridor. Conclusions Our results highlight the importance of understanding the habitat resistance for movement patterns, with humid habitats with covering vegetation providing the best conditions to initiate movement in the common lizard. In addition, population effects, differences in back pattern phenotype and individual plasticity were identified as key parameters influencing movement behaviour.
Page 1 /12
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.