SAS Istvan

Publications of SAS Istvan

• What temperature can tolerate the marsh frog from thermal habitats? Preliminary results concerning the 1 Mai Spa’s population (NW Romania)

  Authors: SAS Istvan, KOVACS Eva-Hajnalka

  Analele Universitatii din Oradea, Fascicula Biologie. 01/2009;

  The aim of this study was the experimental determination of the maximum limit of temperature in which marsh frogs (P. ridibundus) from thermal water habitats can still survive. For the experiment tenThe aim of this study was the experimental determination of the maximum limit of temperature in which marsh frogs (P. ridibundus) from thermal water habitats can still survive. For the experiment ten marsh frogs captured from the nonhibernating population from 1 Mai Spa were used. During the experiment we had determined for each frog the value of two parameters: VTMax and CTMax. Following the experiment we did not identify significant differences regarding the thermoresistance of the studied frogs. Thus VTMax had a mean value of 33.9°C and CTMax had the mean value of 36.7°C.

• Preliminary data regarding the distribution and status of the herpetofauna in Iaşi County (Romania)

  Authors: STRUGARIU Alexandru, Ştefan R. ZAMFIRESCU, NICOARĂ Andreea, GHERGHEL Iulian, SAS Istvan, Cristina M. PUŞCAŞU, BUGEAC Teodor

  North-Western Journal of Zoology. 01/2008;

  This paper presents the results of a study conducted in Iaşi County, Romania, an area for which data regarding the distribution of the herpetofauna has previously remained incomplete. ThirteenThis paper presents the results of a study conducted in Iaşi County, Romania, an area for which data regarding the distribution of the herpetofauna has previously remained incomplete. Thirteen species of amphibians (Salamandra salamandra, Lissotriton vulgaris, Triturus cristatus, Pelobates fuscus, Hyla arborea, Bombina bombina, Bombina variegata, Bufo bufo, Bufo viridis, Pelophylax ridibundus, Pelophylax lessonae, Rana dalmatina and Rana temporaria), nine reptile species (Emys orbicularis, Anguis fragilis, Lacerta agilis, Lacerta viridis, Natrix natrix, Coronella austriaca, Zamenis longissimus, Vipera berus and Vipera ursinii)and hybrids between B. bombina and B. variegata and between P. ridibundus and P. lessonae (Pelophylax kl. esculentus) were recorded in the 62 investigated localities in Iaşi County. Salamandra salamandra is recorded for the first time in the area, east of the Siret river, being situated at its eastern distribution limit for Europe. Among the most important results of our study is the identification of a new locality for one of the rarest European reptiles, Vipera ursinii. One amphibian (Lissotriton montandoni) and one reptile (Elaphe sauromates) have previously been recorded in our study area but we were unable to reconfirm their presence.

• THE HERPETOFAUNA OF THE NATURAL RESERVATION FROM THE INFERIOR COURSE OF THE TUR RIVER AND ITS SURROUNDING AREAS

  Authors: Severus D. COVACIU-MARCOV, SAS Istvan, Alfred St. CICORT-LUCACIU, Horia V. BOGDAN, Eva H. KOVACS, MAGHIAR Cosmin

  Biharean Biologist. 01/2008;

  In the studied area we encountered 14 species of amphibians (Salamandra salamandra, Triturus vulgaris, Triturus cristatus, Triturus dobrogicus, Bombina bombina, Bombina variegata, Pelobates fuscus,In the studied area we encountered 14 species of amphibians (Salamandra salamandra, Triturus vulgaris, Triturus cristatus, Triturus dobrogicus, Bombina bombina, Bombina variegata, Pelobates fuscus, Hyla arborea, Bufo bufo, Bufo viridis, Rana ridibunda, Rana lessonae, Rana dalmatina, Rana arvalis) and 9 species of reptiles (Emys orbicularis, Lacerta agilis, Lacerta viridis, Zootoca vivipara, Anguis fragilis, Natrix natrix, Coronella austriaca, Elaphe longissima and Vipera berus). Hybrids between Triturus cristatus and Triturus dobrogicus, Bombina bombina and Bombina variegata and Rana kl. esculenta are also present in this region. The herpetofauna of this reservation from the inferior course of the Tur River stands out through the glacier relicts that live here, in the woody swamps from the plains (R. arvalis, Z. vivipara and V. berus). Population of Salamandra salamandra and Bombina variegata can be found here at altitudes of no more than 140 m. In this reservation, all the three forms of the Rana green complex that live in Romania are present. The most important sectors of the reservation, from what the herpetofauna is concerned, are the afforested areas. These shelter most of the species and the biggest population of the protected species. The results of our study show the necessity to include into the reservation the forests from Livada.

• Contributions to the knowledge regarding the herpetofauna from the Maramureş county areas of “Măgura Codrului”, Romania

  Authors: COVACIU-MARCOV Severus-Daniel, CICORT-LUCACIU Alfred-Ştefan, SAS Istvan, GROZA Marius-Ioan, BORDAŞ Ionuţ

  Biharean Biologist. 01/2007;

  In the studied region we identified 11 species of amphibians: Salamandra salamandra, Triturus alpestris, Triturus cristatus, Triturus vulgaris, Bombina bombina, bombina variegata, Bufo bufo, HylaIn the studied region we identified 11 species of amphibians: Salamandra salamandra, Triturus alpestris, Triturus cristatus, Triturus vulgaris, Bombina bombina, bombina variegata, Bufo bufo, Hyla arborea, Rana ridiunda, Rana dalmatina, Rana temporaria, 6 reptile species: Lacerta agilis, Lacerta viridis, Anguis fragilis, Elaphe longissima, Coronella austriaca and Natrix natrix, as well as hybrids between Bombina bombina and Bombina variegata. Populations of Triturus alpestris are present in the area at 250 m altitude. Bombina bombina is a premiere not just for the studied area, but for the entire Maramureş district.

• Contributions to knowledge regarding the geographical distribution of the herpetofauna of Dobrudja, Romania

  Authors: COVACIU-MARCOV Severus-Daniel, GHIRA Ioan, CICORT-LUCACIU Alfred-Ştefan, SAS Istvan, STRUGARIU Alexandru, Horia V. BOGDAN

  North-Western Journal of Zoology. 01/2006;

  In Dobrudja we encountered 10 species of amphibians (Triturus dobrogicus, Bombina bombina, Hyla arborea, Pelobates fuscus, Pelobates syriacus, Bufo bufo, Bufo viridis, Rana dalmatina, Rana ridibunda,In Dobrudja we encountered 10 species of amphibians (Triturus dobrogicus, Bombina bombina, Hyla arborea, Pelobates fuscus, Pelobates syriacus, Bufo bufo, Bufo viridis, Rana dalmatina, Rana ridibunda, Rana lessonae), 16 species of reptiles (Emys orbicularis, Testudo graeca, Ablepharus kitaibelli, Lacerta agilis, Lacerta viridis, Lacerta trilineata, Podarcis taurica, Podarcis muralis, Eremias arguta, Coronella austriaca, Zamensis longissimus, Elaphe quatuorlineata, Dolichophis caspius, Natrix natrix, Natrix tessellata, Vipera ammodytes) and also Rana kl. esculenta populations. Some species of amphibians (Pelobates fuscus, Pelobates syriacus) that were only previously known inform the lower regions of the Danube’s meadow and in the vicinity of the Black Sea, were recorded in the high areas of northern Dobrudja. Also here, all three forms of the green frogs’ complex documented for Romania have been encountered, but Rana lessonae and Rana esculenta are very rare, being found only in the north. The central sectors of Dobrudja are severely impacted by human activities, almost completely cleared as a result of agriculture and showed very low number of herpetofauna species as being present. The most important areas for the herpetofauna are the northern and south-western regions.

• Hexadactyly case at a Rana kl. esculenta sample from the north-western part of Romania (Short Notes)

  Authors: SAS Istvan, KOVACS Eva-Hajnalka

  Analele Universitatii din Oradea, Fascicula Biologie. 01/2006;

  At 17 June 2006, in a habitat close to Gherta Mica locality (47°56'0'' N, 23°14'0'' E, Satu-Mare County, Romania) we had found a sample of Rana kl. esculenta which presented hexadactyly at both ofAt 17 June 2006, in a habitat close to Gherta Mica locality (47°56'0'' N, 23°14'0'' E, Satu-Mare County, Romania) we had found a sample of Rana kl. esculenta which presented hexadactyly at both of its posterior feet. The captured sample of edible frog had fully formed extra (sixth) toes, with phalanges (bones). The hexadactyly was perfectly symmetrical at both of the posterior feet. At this individual we did not discovered any other malformations, the biometrical characters situating in the variations limits of the other green frogs from the studied habitat. A symmetric hexadacytly can be a result of atavism.

• Preliminary data concerning the distribution of amphibian fauna in Suceava county (Romania)

  Authors: STRUGARIU Alexandru, GHERGHEL Iulian, Mihail Victor HUTULEAC-VOLOSCIUC, Tiberiu Constantin SAHLEAN, SAS Istvan, Cristina Maria PUSCASU

  Analele Universitatii din Oradea, Fascicula Biologie. 01/2006;

  The present study focused upon an area in which the herpetofauna had previously been very poorly studied and aimed to identify the species of amphibians from the research area and to establishThe present study focused upon an area in which the herpetofauna had previously been very poorly studied and aimed to identify the species of amphibians from the research area and to establish distribution areas. In the 54 investigated localities 16 species of amphibians (Salamandra salamandra, Triturus vulgaris, Triturus cristatus, Triturus alpestris, Triturus montandoni, Pelobates fuscus, Bombina bombina, Bombina variegata, Hyla arborea, Bufo bufo, Bufo viridis, Rana dalmatina, Rana temporaria, Rana arvalis, Rana ridibunda & Rana lessonae) and 2 hybrids (Bombina bombina X Bombina variegata & Rana kl. esculanta) have been identified. Of these, the Bombina hybrids have been identified for the first time in the studied region.