bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ecological Isolation in Triturus cristatus and Triturus marmoratus (Amphibia: Salamandridae)
Authors: Schoorl Jaap , Zuiderwijk Annie 
Published: April 2008

AbstractA field study has been made in the relatively narrow sympatric zone of Triturus cristatus and T. marmoratus, in the department Mayenne (France). Ecological data have been analysed. In the sympatric area specific preferences appear to exist: ecological isolation has developed in some areas. Typical T. marmoratus areas are hilly and wooded, provided with many terrestrial hiding-places, while forest pools and springs especially serve as spawning sites. T. cristatus areas are flat and open. Comparison with distribution data of 24 years ago shows expansion of T. cristatus at the expense of T. marmoratus, which presumably is true for the whole sympatric zone. The preferences of the species in combination with changes in environment by human intervention explain the detected changes in distribution. Ecological isolation as a phenomenon in the speciation of both species is discussed.
La lagartija de Bocage, Podarcis bocagei (SEOANE, 1884): Primeros datos sobre su distribución, colorido y ecología
Authors: Perez Mellado Valentin 
Published: April 2008

AbstractP. bocagei is considered a valid species, and several criteria are used for distinguish it in sympatry of P. hispanica, a closely related species. A detailed distribution map is provided for this lizard, which occurs in Galicia, León, Orense, Zamora, western slopes of the Sistema Central, and probably, the north of Portugal. P. hispanica males and females in the Sistema Central are significant larger than males and females of P. bocagei. Significant differences in size, scalation and ecology are apparent between the Sistema Central and northern populations of P. bocagei, but no taxonomic decisions are made, pending a more detailed study. The examination of the masseteric shield revealed its large size in P. bocagei and its absence in most of the P. hispanica studied. P. bocagei has a relatively robust, deep skull, probably related to his terrestriral habits, unlike P. hispanica, which has a flattened skull and, at least in the Sistema Central, is a saxicolous species. P. bocagei is very common in Galicia and is found there at altitudes between 0 and 1500 meters, but in the Sistema Central is restricted to Quercus pyrenaica forests, between 800 and 1200 meters.
Feeding Ecology of the Nocturnal Gecko Hemidactylus brookii in Ghana
Authors: Avery R.A. 
Published: April 2008

AbstractThe diet of Hemidactylus brookii captured at Legon, Ghana, during July was composed entirely of arthropods; Lepidoptera larvae and cockroaches formed 40% of the total weight of food. Daily food intake during the dry season estimated from production of excretory urates was equivalent to that of small diurnal lizards, and given by the relationship F = 20.9W0.51 where F = food consumption in mg dry weight per day and W = live weight in grams. Daily intake during the wet season was variable and often reduced.
Comparaison electrophorétique de quelques espèces de Lacertidés Méditerranéens, Genera Podarcis et »Archaeolacerta«
Authors: Guillaume Claude-P. , Lanza Benedetto 
Published: April 2008

Abstract
An electrophoretic investigation of 17 gene loci in 11 populations of Meditteraneans lacertids (Podarcis muralis, P. tiliguerta, P. hispanica, P. sicula, "Archaeolacerta" bedriagae) completed with a dendrogram after unweighted pair groups' arithmetic average cluster analysis of NEI genetic identity values, show: - important differences between Podarcis muralis and Podarcis tiliguerta, apparently sufficient to justify the maintenance of this taxon at the specific level; - important differences between animals of Archaeolacerta, Podarcis and Lacerta s. str. (MAYER et TIEDEMANN, 1982) which would allow to raise Archaeolacerta at a generic statute. This study allows equally to establish the diminution of percentage of polymorphic loci for micro-insular P. tiliguerta populations according to the removal from Sardinia and the estimate separation's time. A tentative phylogenetic explanation is done by the authors.
Water balance of salamanders (Salamandra salamandra (L.)) from different habitats
Authors: Degani Gad 
Published: April 2008

AbstractSalamanders (Salamandra salamandra) from semi-arid and moist habitat maintained their body weight constant on 40% and 50% field capacity respectively. The water turnover of salamanders from moist habitats (50 % field capacity) was 93 μl.g-1.day-1 and the water turnover of salamanders from semi-arid habitats (40% field capacity) was 47 μl.g-1.day-1 and 49 μl.g-1.day-1. The blood plasma concentration of salamanders from semi-arid habitats was higher than the blood plasma concentration of salamanders from moist habitats when they were found, in water balance, on soil with a low moisture content.
Chemotaxonomical investigations in the collective genus Lacerta (LACERTIDAE; SAURIA) by means of protein electrophoresis
Authors: Mayer Werner , Tiedemann Franz 
Published: April 2008

Abstract10 species (peloponnesiaca, muralis, melisellensis, graeca, oxycephala, horvathi, bedriagae, vivipara, viridis, agilis) of the genus Lacerta were examined by employing protein electrophoretic data for 16 genloci. Gene frequencies are given and genetic distances calculated according to NEI (1971, 1972). These and former attempts to subdivide the genus Lacerta are discussed. The electrophoretic results provide the possibility of a classification of the examined species into groups at the subgenus level corresponding to those valid before BÖHME (1971) and ARNOLD (1973): genus Lacerta subgenus Lacerta s. str. subgenus Podarcis subgenus Archaeolacerta subgenus Zootoca
Zur Frage der taxonomischen Stellung europäischer und nordwestafrikanischer Perleidechsen (Sauria, Lacertidae, Lacerta lepida-Gruppe)
Authors: Bischoff Wolfgang 
Published: April 2008

AbstractOcellated lizards from Tunisia and Spain respectivelywere hybridized. The hybrids proved to be much more aggressive than normal specimens but did not show any sexual activity among each other. Back crossing experiments revealed a strongly reduced fertility of the hybrids and demonstrated that the degree of genetic incompatibility by far exceeds the subspecific, i. e. infraspecific level. The two forms are, thus, ranked here as allospecies: Lacerta pater LATASTE, 1880, and Lacerta lepida DAUDIN, 1802.
The Incrassatio Frontoparietalis in Frogs, its Origin and Phylogenetic Significance
Authors: Jarosova Jirina , Rocek Zbynek 
Published: April 2008

Abstract
The incrassatio frontoparietalis is a clearly delimited part ofthe frontoparietal, covering the gap or gaps in the dorsal wall of the endocranium. In frogs, this structure originates in very early ontogenetic stages, and keeps its shape without considerable changes till maturity. Therefore, it is probably a good diagnostic character. Moreover, it is presumed that this structure also is a good phylogenetic character, and its study based on an extensive recent and fossil material might contribute to our present knowledge of the frog phylogeny.
Embryogenèse et Relations Nucleocytoplasmiques chez les Hybrides experimentaux entre Bufo bufo l., Bufo viridis LAUR. et Bufo calamita LAUR
Authors: Delarue Michel 
Published: April 2008

AbstractHybridization between three european species of Bufonids (B. bufo; B. viridis and B. calamita) has been performed under laboratory conditions. Developmental analysis have shown that morphogenesis is very often affected by hypomorphosis. When hybrids are viable up to an advanced stage, it is possible to disclose expression ofparental characters. Developmental difference between reciprocal crossings compared to nucelocytoplasmic hybridization (interspecific nuclear graft) lead to show a viability which is always greater for hybrids formed with B. bufo eggs. This remark joined to injection experiments ofcytoplasmic fractions (DELARUE, 1981)emphasizes qualitative differences of each species receiving egg cytoplasm about their morphogenetic potentialities.
Seasonal changes in the testes and ductus epididymis of the lizard Agama stellio stellio
Authors: Loumbourdis N.S. , Kattoulas M.E. 
Published: April 2008

AbstractIn this study, the breeding biology of the lizard Agama stellio stellio was investigated. Adult testis weight changes markedly during the year, reaching maximum size in spring and minimum in summer. Seminiferous tubule diameter has its maximum level in spring and minimum in summer. Spermatogenesis is initiated in mid August and terminated in early July. Spermiogenesis is generally restricted to the period following hibernation. In July and August there is a complete spermatogenetic stasis. Epididymal tubules have their maximum diameter and epithelial cell height in spring. They are secretory during this season.
Size Relationship between Growing Oocytes and Their Nuclei in Two Gekkonine Lizards
Authors: Duda P.L. , Annalakshmi M. 
Published: April 2008

AbstractThe role played by the nucleus in growth and differentiation of oocytes in lower chordates is well documented (CASPERSSON, 1950; RAO, 1959; MAZIA, 1969). All such studies ask for the determination of changes in the nuclear size at different stages of growth of the oocytes to establish such a role. No account of dimensional changes in a growing oocyte correlated with changes in its nucleus is available for an amniote and to the best of our knowledge, none for a reptile. This communication describes the metrical relationship between growing oocytes and their nuclei in two gekkonine lizards, Hemidactylus flaviviridis and H. brooki, from India with the aim of determining the extent of the influence of the nucleus over the growth and differentiation of the oocytes of these lizards.
Autecological Observations of Acanthodactylus erythrurus (Sauria: Lacertidae) in Southern Spain
Authors: Busack Stephen D. , Jaksic Fabian M. 
Published: April 2008

AbstractAutecological aspects of Acanthodactylus erythrurus were examined at La Algaida, Cádiz Province, Spain. The male population is composed of 60 % adult and 40 % subadult individuals; male hatchlings increase in size at a rate of 0.06 mm/day from hatching ( 31 mm snout-vent length) to sexual maturity (∼61 mm); 50 % do not survive beyond 1.5 years, but those which reach adult size may live 1.9 years. Females grow from hatching (∼ 28 mm) to sexual maturity( 57 mm) at a rate of 0.05 mm/day; less than half survive 1.4 years and the life span of some individuals is 2.1 years. Adult males outnumber adult females 1.4:1, but subadult ratios are 1:1. Adults and subadults associate with different plant species during their activity period, but each age class tends to avoid open sand patches. These 8.4-13 g lizards feed on a wide variety of insects and appreciable quantities of plant material. 49% ofall males and 82% ofall females actively consume Halimium halimifolium. We suspect this lizard species is wide ranging and non-territorial ; only one agonistic encounter was recorded and it was interspecific (with Psammodromus algirus). The frequency of escape from predation is estimated at 26.8 %, based on tail-loss figures, and the incidence of cestode parasitism (Oochoristica cf. tuberculata) is 2.1 %. The population studied was highly resilient to 16 months of intense human predation.
Effect of Temperature on the Oxygen Consumption of Lizards from different Climatic Regions
Authors: Al-Sadoon Mohamed K. , Spellerberg Ian F. 
Published: April 2008

Abstract
Oxygen consumption levels and metabolic rate temperature curves of various lizard species from three different climatic regions were examined in relation to ambient temperature. The species used in this research were as follows: Anguis fragilis, Lacerta vivipara, Lacerta agilis (cool temperate species); Blanus cinereus, Podarcis hispanica, Podarcis lilfordi brauni, Podarcis lilfordi lilfordi, Podarcis muralis, Psammodromus algirus, Tarentola mauritanica (warm temperate species); Chalcides ocellatus, Acanthodactylus opheodurus, Acanthodactylus schmidti (desert species). A double chamber volumetric closed system was used to measure the resting oxygen consumption of the lizards. Acute oxygen consumption determinations were made, that is the lizards were not allowed to acclimate to the test temperatures. Interspecific differences in levels of resting oxygen consumption and in the characteristics of the metabolic rate temperature curves were examined in relation to methods of thermoregulation and in relation to the ecology of the respective species. Evidence for "temperature dependent shifts" and "low thermal dependence" was found in the metabolic rate temperature curves of some species. A diminishing Q10 at or below the voluntary body temperatures suggests some degree of metabolic homeostatsis and energy conservation.
The Occurrence of Polymely and Polydactyly in Natural Populations of Anurans of the USSR
Authors: Borkin Leo J. , Pikulik M.M. 
Published: April 2008

AbstractVarious cases of isolated and mass polymely and polydactyly in anurans of the USSR fauna are summarized. Mass polydactylies in frogs Rana arvalis arvalis and Rana lessonae-Rana esculenta as well as in toad Bufo bufo bufo are reported. Classiication of polydactyly types based on X-ray analysis is proposed. Species-specificity and lozalized appearance of mass polydactyly factor(s) are discussed.
Comportement Agonistique et Structure Sociale du Lezard Nocturne Malgache Paroedura pictus (Peters, 1854) (Sauria, Gekkonidae) Etudié au Laboratoire
Authors: Brillet C. 
Published: April 2008

AbstractNon.ritualised social behaviour patterns of the nocturnal Madagascan gecko, Paroedura pictus are described, and the ritual elements of the agonistic dialogue (approaches, threatening displays, confrontations) are analysed. A repertory of gestures is observed, comparable in its diversity to that of diurnal lizards such as the Iguanidae, as well as some behavioural flexibility. The group structure is a hierarchical one of despotic character. The absence of territorial behaviour in this very aggressive species has been proved experimentally.
On the Development of Electroreceptive Ampullary Organs of Triturus alpestris (Amphibia: Urodela)
Authors: Fritzsch Bernd , Bolz Dorothea 
Published: April 2008

Abstract
The ontogenesis of the organs of the lateral-line system of the alpine newt (Triturus alpestris) was examined with special emphasis on the ampullary organs using resin embedded thick sections. The mechanoreceptive neuromasts and the electroreceptive ampullary organ were indistinguishable prior to hatching. At hatching only few ampullary organs were found around the eye. These organs consist of one or two egg-shaped sensory cells and a few supporting cells. The ratio of ampullary organs and neuromasts changes from 1:15.6 (stage 36) to 1:1.1 (stage 62). The number of unidentifiable organs decreases constantly over this period of time and becomes zero at the oldest stages observed. Besides an absolute numerical increase in both types of organs both grow by increasing the number of cells per organ. Comparison with the development of the ampullary organs in catfish shows a striking similarity which suggest either similar functional constraints acting on both catfish and newts or can be interpreted as an indication of homology of both types of organs.
A Taxonomical Survey of the Mountains Frogs of Anatolia
Authors: Baran Ibrahim , Atatür Mehmet K. 
Published: April 2008

AbstractThe aim of this survey is to establish systematical positions of the mountain frogs of Anatolia. Our material was obtained from 24 different populations; 18 populations, of which we have a sufficient number of specimens, are compared biometrically. Due to insufficient number of available specimens, it was not possible to establish properly the taxonomical positions of populations from Artvin and Hakkâri regions. Newer and richer material should be studied from the said localities to clear their taxonomical status.
Régime Alimentaire d'une Population de Lézard des Murailles, Podarcis muralis (Laurent, 1768) dans le Sud-Ouest de la France
Authors: Mou Yung-Ping , Barbault Robert 
Published: April 2008

Abstract
Diet and its variations as a function of time and of lizard size were studied in a natural population of Podarcis muralis in the south-west of France during 1980 and 1981. The taxonomic diversity of the ingested food items, the wide range of prey size, the absence of a close relationship between prey and predator size, and the seasonal and interannual variation of the composition of the diet emphasize the alimentary opportunism of this lizard species. Such opportunism is supposed to be related to the ecological conditions of the studied population, which include high population density, low prey productivity within the biotope, unpredictable variability of prey abundance, and low interspecific competitive pressure.
Sex Recognition by Males of the Lizard Lacerta vivipara: An Introductory Study
Authors: Bauwens Dirk , Nuijten Kees , van Wezel Henk , Verheyen Rudolf F. 
Published: April 2008

Abstract
The role of colour pattern and odiferous cues in sex identification by adult males of the lizard Lacerta vivipara was examined by observing their behavioural response towards several types of introduced conspecific adults. Reproductive males courted both receptive and non-receptive adult females. In addition, they courted introduced males that were painted to mimic the females' colour pattern, indicating that pigmentation functions in sex recognition. Responses of males to females painted as males, untreated females, and uniformly black painted females were identical. This demonstrates that males do not rely exclusively on colour pattern for sex recognition. Odour does not seem to be important as a secondary factor in stimulating courtship. The possible contribution of other stimuli to sex identification is discussed.
Molecular Relationships among Iberian, Moroccan, and South African Lacertid Lizards (Reptilia: Lacertidae)
Authors: Busack Stephen D. , Maxson Linda R. 
Published: April 2008

AbstractRelationships among representatives of five genera of lacertid lizards from Iberia, Morocco, and South Africa were studied using quantitative micro-complement fixation analysis of serum albumin evolution. Using the albumin molecular clock to establish divergence times we suggest (1) South African Ichnotropis and North African Psammodromus diverged from the lineage representing Lacerta lepida-L. monticola during the Oligocene, (2) South African Pedioplanis and Heliobolus diverged from this lineage during the late Miocene, and (3) ancestral representatives of L. andreanszkyi, L. perspicillata and Podarcis hispanica diverged from lineages leading to L. monticola and L. lepida during the mid-Miocene. Radiation within the Palearctic Lacertidae has clearly been extensive, yet fewer than twenty percent of the species in this radiation have been examined biochemically. Until additional data can be gathered, the current classification of the Palearctic Lacertidae cannot be much improved and we recommend adherence to the taxonomy proposed by Arnold (1973).
Egg and embryo proteins in European newts (genus Triturus) and their taxonomic potential
Authors: Veith Michael 
Published: April 2008

AbstractPolyacrylamide disc electrophoresis was carried out on water soluble proteins of eggs and embryos of Triturus alpestris, T. boscai, T. cristatus, T. helveticus, T. marmoratus and T. vulgaris. "Major bands" and "minor bands" were defined and species specific phenotyps are described. The patterns of major bands proved to be rather constant during embryonic development up to approximately stage 30 (stretched tailbud stage). The method as used in this study is considered to be practical and relevant for diagnostic studies on Triturus species.
Algunos Aspectos de la Biologia Reproductiva del Sapito Silbador Leptodactylus fuscus (Schneider) (Amphibia: Leptodactylidae)
Authors: Solano Haydée 
Published: April 2008

AbstractLeptodactylus fuscus nests in the savanna of Calabozo (Guárico, Venezuela) from April to September. Eggs are deposited in foam nests in underground chambers. Details of embryonic and larval development are given. Gravid females contained eggs in three stages of development suggesting more than one clutch per season. Recruiting of young takes place 2½ months after eggs have been laid. There was not significant correlation between the number of eggs and female total length, neither between body volume and volume of ovarian complement. Eleven per cent of the body volumen was occupried by the egg mass. No significant correlation exists between this value and female body size. Peculiarities of the advertisement call of the male and presence of filial cannibalism are discussed.
Infrageneric classification and species composition of the anole genera, Anolis, Ctenonotus, Dactyloa, Norops and Semiurus (Sauria: Iguanidae)
Authors: Savage Jay M. , Guyer Craig 
Published: April 2008

AbstractAll valid species of Anolis, Ctenonotus, Dactyloa, Norops and Semiurus are listed by genus and where possible by the infrageneric categories (from most to least inclusive): series, subseries and species groups. An alphabetical index cross-referencing the species names to genus and series is also included.
Sperm morphology of Batrachyla (Anura: Leptodactylidae)
Authors: Garrido Orlando , Pugin Emilio , Jorquera Boris 
Published: April 2008

Abstract
The structure of immature and mature sperm of the three species of Batrachyla were compared by using smears for light microscopy and ultrathin sections for transmission electron microscopy. Minor differences in length and some ultrastructural details support the notion that B. antartandica and B, taeniata are more closely related to each other than to B. leptopus. Comparisons of the sperm of Batrachyla with those of other anurans suggest the sperm morphology may be correlated with broad phylogenetic relationships as well as mode of fertilization.
A new species of collared frog (Anura: Dendrobatidae: Colostethus) from Serrania de Portuguesa, Andes of Estado Lara, Venezuela
Authors: La Marca Enrique 
Published: April 2008

AbstractA new species of frog of the genus Colostethus (Anura: Dendrobatidae) is described from Andean mountain streams and pools at Parque Nacional Yacambu, Estado Lara, Venezuela. The taxon (Colostethus yustizi sp. nov.) belongs in the Colostethus collaris Group and it is distinguished from members of this monophyletic assemblage by the presence of a dark collar with pale spots, and by its reduced foot web.
On the taxonomic status of Dipsadoboa aulica aulica Günther and D. aulica flavida Broadley and Stevens, with the description of a new subspecies of D. flavida Broadley and Stevens (Boiginae, Serpentes)
Authors: Bødtker Rasmussen Jens 
Published: April 2008

AbstractVariation in the African marbled tree snake, Dipsadoboa aulica, has been analyzed within the framework of a review of the whole genus. Three forms are most readily distinguished on the basis of coloration and on internal morphology. Within each form a gradual colour change takes place from juveniles to adults. The following taxonomic changes are proposed:
Bones of giant lacertids from a new site on El Hierro (Canary Islands)
Authors: Izquierdo I. , Medina A.L. , Hernández J.J. 
Published: April 2008

Abstract
A new deposit of giant lacertids is described from a volcanic cave in the western part of El Hierro island. On the basis of an analysis of the 388 pieces found in this deposit, using both the literature and osteological material from Tenerife and El Hierro, it is concluded that three different species are represented: Gallotia goliath (Mertens), now extinct in the Canary Islands, Gallotia simonyi (Stein.) and Gallotia galloti caesaris (Lehrs). The two last species are still present on the island. The presence of G. goliath in this deposit represents the first record of this species in the island of El Hierro.