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Articles 31 - 45 of 45
Full-Text Articles in Physical Sciences and Mathematics
A Perçu Sur La Composition, I'Origine Et La Formation De La Faune Cavernicole De La Stara Planina Occidentale (Bulgarie), Petar Beron
International Journal of Speleology
The karstic area between the rivers Timok and Vit has about 500 caves and pot-holes, more than 300 of them being the subject of the present study. In this area (called here Western Stara Planina) we have noted 63 species and subspecies of terrestrial troglobites and 17 species and subspecies of aquatic troglobites. The two Regions into which we split the area (region of Ogosta and Region of Iskar) are the richest in cave fauna of Bulgaria. This study deals with the particularities in the composition and the distribution of the different groups of terrestrial troglobites, and especially of such …
Observations Sur I'Écologie Et La Distribution Des Turbellariés Tricladides Dépigmentés Et Anophtalmes De Roumanie, L. Botosaneanu
Observations Sur I'Écologie Et La Distribution Des Turbellariés Tricladides Dépigmentés Et Anophtalmes De Roumanie, L. Botosaneanu
International Journal of Speleology
Twenty-two localities, where unpigmented and mostly blind tricladid turbellarians (Dendrocoelidae and Fonticola) were discovered by the author, are described in more or less detail. These animals are particularly well represented in Romania; the explanation is that they are expansive offshoots of a fauna formerly inhabiting the huge brackish or freshwater lakes which covered most of this country during the Neogene (and especially the Sarmatian). Different species are inhabitants of different particular habitats of the underground water realm, and the author distinguishes between species inhabiting cave waters, typical phreatobionts, hyporheic species and species living in springs or springbrooks. These species are …
Studies Of The Cave Crayfish, Orconectes Inermis Inermis Cope (Decapoda, Cambaridae). Part Iv: Mark-Recapture Procedures For Estimating Population Size And Movements Of Individuals, Horton H. Hobbs Iii
Studies Of The Cave Crayfish, Orconectes Inermis Inermis Cope (Decapoda, Cambaridae). Part Iv: Mark-Recapture Procedures For Estimating Population Size And Movements Of Individuals, Horton H. Hobbs Iii
International Journal of Speleology
Several methods for permanently marking cavernicolous crayfishes were investigated prior to initiation of field work in Pless Cave, Lawrence County, Indiana. Internally injected ink complemented with external “painting” proved to be a most satisfactory tagging procedure. During the two-year study period 211 individuals of the troglobitic crayfish Orconectes inermis inermis Cope were marked; 96 tagged individuals were recaptured at least once, a 46% recapture rate. The population size was estimated to be 1586 +/- 79 (95% C.L.) over the 540 m subterranean stream study area and remained relatively stable during the period of 1970 to 1972. The home range of …
Diplopoda From Papuan Caves (Zoological Results Of The British Speleological Expedition To Papua-New Guinea, 1975, 4), Richard L. Hoffman
Diplopoda From Papuan Caves (Zoological Results Of The British Speleological Expedition To Papua-New Guinea, 1975, 4), Richard L. Hoffman
International Journal of Speleology
Eight species of polydesmoid millipeds are described from the caves of the extreme northwestern corner of Papua New Guinea. Four new genera are named: in Paradoxosomatidae, Selminosoma, type S. chapmani; Astromontosoma, type A. jeekeli; in Doratodesmidae, Scolopopyge, type S. pholeter; Selminarchus, type S. hispidus. Two additional new species are referred to established genera Eustrongylosoma exiguum and Nothrosoma beroni, the latter, however, (known only from females) is probably referable to a new genus. Selminosoma chapmani appears both from its structure and biology to be a true troglobite, the first such species known in the Paradoxosomatidae. The two doratodesmid species extend the …
A Contribution To The Study Of The Genus Porrhomma (Araneae: Linyphiidae). Notes On A Population Of P. Egeria (Simon) And Other Cavernicolous Species, J. D. Bourne
International Journal of Speleology
A morphological and biometrical study of a population of Porrhomma egeria (Simon) has allowed to determine that P. moravicum (Miller and Kratochvil) and P. obambulatum (Kritscher) belong to the same species and should thus be considered synonymous. The importance of biometric studies for the study of this Genus is emphasised.
Bogidiella Martini, Un Nouvel Amphipode Souterrain De I'Ile Saint-Martin (Antilles) Et La Zoogéographie Des Bogidiellidae, Jan H. Stock
Bogidiella Martini, Un Nouvel Amphipode Souterrain De I'Ile Saint-Martin (Antilles) Et La Zoogéographie Des Bogidiellidae, Jan H. Stock
International Journal of Speleology
Both sexes of a new species of Bogidiella, B. martini, are described. The new species, with a very pronounced sexual dimorphism, has been discovered in two wells in the island of St.-Martin (French part), one of the Lesser Antilles. Another member of Bogidiella has been recorded from the island of Curaçao, but the specimens were damaged too much to allow proper description. The Bogidiellidae (5 genera, 26 named species, and several unnamed species) are present in the sea as well as in inland waters. The family has a wide distribution, exceeding the boundaries of the former Tethys Sea. Probably, …
Un Nouveau Microparasellide Des Eaux Souterraines Phréatigues De I'Italie: Microcharon Arganoi N. Sp. (Crustacea: Isopoda), Giuseppe L. Pesce, Pierantonio Teté
Un Nouveau Microparasellide Des Eaux Souterraines Phréatigues De I'Italie: Microcharon Arganoi N. Sp. (Crustacea: Isopoda), Giuseppe L. Pesce, Pierantonio Teté
International Journal of Speleology
Microcharon arganoi, a new Microparasellid from subterranean waters of Southern Italy is described. For the shape and ornamentation of pleopod II of females and for the morphology of pleopod II of males, the new species is clearly related to the phyletic line which includes all the Western and French species of the genus. However, from all these species and from all the other ones M. arganoi differs by the ornamentation of the antennae, maxillipeds and pereiopeds, by the shape and ornamentation of pleopods I and II of males and II of females. and by ratio endopod/exopod of pleopod III. …
Carotenoids In Niphargus Casimiriensis Skalski (Amphipoda) From Artesian Wells, B. Czeczuga, A. Skalski
Carotenoids In Niphargus Casimiriensis Skalski (Amphipoda) From Artesian Wells, B. Czeczuga, A. Skalski
International Journal of Speleology
By means of columnar and thin-layer chromatography, the presence of carotenoids in Niphargus casimiriensis Skalski from an artesian well was studied. There are qualitative and quantitative differences in the carotenoid contents of the Niphargus casimiriensis Skalski specimens.
Humidity Responses And The Role Of Hamann's Organ Of Cavernicolous Bathysciinae (Coleoptera Catopidae), Marco Lucarelli, Valerio Sbordoni
Humidity Responses And The Role Of Hamann's Organ Of Cavernicolous Bathysciinae (Coleoptera Catopidae), Marco Lucarelli, Valerio Sbordoni
International Journal of Speleology
The humidity responses of Bathysciola derosasi and Leptodirus hohenwarti, two species of troglobitic Bathysciinae showing different degrees of adaptation to cave environment, have been studied. Intact and antennectomised subjects were tested using choice-chambers with various combinations of relative humidity alternatives (i.e. 20-100%, 50-100%, 90-100%, 50-90% and, as controls, 100-100%) to investigate the role played by the sense organs situated on the 7th, 9th and 10th antenna segments. The results show that intact-antenna subjects of both species are very sensitive to humidity gradients and that their intensity of reaction varies according to the intensity of stimulus, as previously reported by …
Ostracodes Hypogés Du Sud De La France. 1. Mixtocandona Juberthieae N.Sp., Dan L. Danielopol
Ostracodes Hypogés Du Sud De La France. 1. Mixtocandona Juberthieae N.Sp., Dan L. Danielopol
International Journal of Speleology
The description of Mixtacandona juberthieae n.sp. is presented. The new species belongs to the group taurica and has been found in the karstic system of the Vidourle river at Sauve (Gard).
Un Asellide Interstitiel Du Bassin De I'Ebre (Espagne): Proasellus Lescherae N.Sp. (Crustacea, Isopoda, Asellota), Jean-Paul Henry, Guy Magniez
Un Asellide Interstitiel Du Bassin De I'Ebre (Espagne): Proasellus Lescherae N.Sp. (Crustacea, Isopoda, Asellota), Jean-Paul Henry, Guy Magniez
International Journal of Speleology
Proasellus lescherae n.sp. is a little, interstitial species, living in the underflow of Rio Guadalope Basin (a tributary of Ebro River). It is related to the water-slaters of the underground waters of the Pyreneo-cantabrigian region (the phyletic line of ProaselIus spelaeus Racovitza). The mean size of the reproductive females is very small (2.9 mm) and the brood contains only 6-10 eggs. Nevertheless, the size of the eggs and intramarsupial larval stages are the same as in epigean or hypogean species of the genus, which reach a larger adult size.
Ostracodes Du Sud De La France 2. Pseudocandona Simililampadis N.Sp., Dan L. Danielopol
Ostracodes Du Sud De La France 2. Pseudocandona Simililampadis N.Sp., Dan L. Danielopol
International Journal of Speleology
The description of Pseudocandona simililampadis n. sp. is presented. The new species belongs to the group schellenbergi and has been found in the karstic system of the Vidourle river at Sauve (Gard).
The Development Of Limestone Cave Systems In The Dimensions Of Length And Depth, Derek Clifford Ford, R. O. Ewers
The Development Of Limestone Cave Systems In The Dimensions Of Length And Depth, Derek Clifford Ford, R. O. Ewers
International Journal of Speleology
Karst caves are defined as solutional cavities 5-16 mm in diameter and discussion is limited to cases where such continuously extend to a surficial input or output or both. Three opposed sets of general genetic hypotheses (“the classical hypotheses”) have been presented for such caves, Arguing that the majority develop 1) in the vadose zone 2) in the phreatic zone 3) proximate and parallel to a watertable. It is contended here that vadose, phreatìc and watertable caves are all of common occurrence and may be linked in one genetic theory. A four state model is proposed in which ideal phreatic …
Niveaux De Base Actuels Dans Les Principaux Canyons Du Languedoc Oriental Et Des Plans De Provence, G. Fabre, J. Nicod
Niveaux De Base Actuels Dans Les Principaux Canyons Du Languedoc Oriental Et Des Plans De Provence, G. Fabre, J. Nicod
International Journal of Speleology
In a karstic country cut by a canyon in which runs an allogenic river, there are several base levels (karstic, fluvial...); chiefly if the limestones develop greatly under the bottom of the gorge. The difficulty of characterizing them appears in all the definitions given. From the example of the three most important canyons of the Eastern Bas Languedoc (South-East of France) and with the different geological controls (s.l.) one ascertains that at present: a) When an allogenic and surface river is perennial without important loss there is a total connection between fluvial level and karstic base level. b) When an …
Sui Rhachomyces (Ascomycetes, Laboulbeniales) Parassiti Dei Duvalius Italiani (Coleoptera, Carabidae, Trechini), W. Rossi
International Journal of Speleology
The systematic position, variability and distribution of the two species of Rhachomyces parasitic on Italian Duvalius are defined on the basis of several new findings. Rhachomyces stipitatus Thaxter was found in Liguria, central Italy, Sicily and Sardinia; its synonymy with R. capucinus Thaxter is confirmed and the ssp. pallidus Maire is considered of no systematic relevance. R. maublancii, whose position is regularized by a Latin validating diagnosis, was only found on the Alps and previous records in other countries are questioned.