Primary Productivity and Activity Coefficients of the Phytoplankton of a Mesotrophic Soft-Water Lake (Piburger See,Tirol, Austria)

Phytoplankton primary production was measured using the ¹⁴C method once per month from 1973 through 1976 as part of an intensive ecosystem study of a small eutrophic soft-water lake, under restoration since 1970. Relationships among phytoplankton production, species composition, chlorophyll a content, bacteria, zooplankton and a variety of abiotic environmental factors have been studied. Productivity normally showed one peak in spring and another in summer, whereas a minimum was reached under the ice cover in February or March. Maximum production rates in the depth profile ranged from 3 to 144 mg C · m⁻³ · d⁻¹, integral production from 6 to 510 mg C · m̄⁻² · d⁻¹. Species of Cyanophyceae, Dinophyceae, Chlorophyceae and Chrysophyceae dominated alternately and showed significant differences in the level and variation of photosynthetic activity. Maximum activity was observed in summer. A high biomass increase during late winter and spring despite low primary productivity resulted from the immigration of the dominant blue-green alga, Oscillatoria limosa, from the sediment. Energy efficiency increased not only with depth in the light-limited parts of the euphotic zone but at all depths during bad weather conditions and during the decrease of irradiance in autumn.     

Karyotype of Chukotka char from Estikhed Lake (Eastern Chukotka)

The karyotype of chars from the Estikhed Lake (Eastern Chukotka) was examined. This karyotype comprises 78 chromosomes, NF = 98. Marker chromosomes include one pair of submetacentrics, one pair of large acrocentrics, and one pair of large subtelocentrics with very short second arms. Nucleolus organizer regions are located in telomeric regions of short arms of marker submetacentric chromosomes. Small heterochromatin blocks are observed in centromeric regions of most chromosomes. The Chukotka char karyotype is very similar to that of Taranetz char Salvelinus taranetzi from the Achchen Lake: these karyotypes differ only in stability of the chromosome number.     

铁箍散(五味子科)的核型研究

采用常规制片方法首次对铁箍散(Schisandra propinqua（Wall.）Baill.)做了核型分析,结果表明铁箍散体细胞染色体数目为2n=28,核型公式为2n=2x=20m+8sm,染色体相对长度组成2n=28=2L+14M₂+8M₁+4S,染色体长度比为2.14,核型类型为2B型,核型不对称系数0.59,无次缢痕和随体。铁箍散的核型特点表明其在五味子属中处于较进化的地位。     

Karyotype of Ornithogalum chionophilum (Hyacinthaceae)

A karyotype of Ornithogalum chionophilum is presented. The relationship between this species and O. lanceolatum, O. cuspidatum and O. montanum is discussed.     

7种绢蒿属植物染色体数目和核型研究

首次报道了中国绢蒿属[Seriphidium (Bess.) Poljak.]7种植物的染色体数目和核型,其核型公式分别为:西北绢蒿[S.nitrosum (Web.ex Stechm.) Poljak.]2n=2x=18=6m(2SAT)+8sm +2st+2T;沙漠绢蒿[S.santolinum (Schrenk) Poljak.]2n=2x=18=14m+4sm;博洛塔绢蒿[S.borotalense (Poljak.) Ling et Y.R.Ling]2n=2x=18=2M+14m+2sm;新疆绢蒿[S.kaschgaricum (Krasch.) Poljak.]2n=2x=18=8m(2SAT)+10sm(2SAT);纤细绢蒿[S.gracilescens (Krasch.et Iljin) Poljak.]2n=2x=18=4m+14sm(2SAT);三裂叶绢蒿[S.junceum (Kar.et Kir.) Poljak.]2n=2x=18=10m+4sm+4st;民勤绢蒿[S.minchünensa Y.R.Ling]2n=2x=18=12m+6sm.结果表明,7种绢蒿植物中,博洛塔绢蒿最原始,西北绢蒿最进化.     

Karyotype analysis in some species of Consolida (Ranunculaceae) from Iran

Consolida (dc .) S. F. Gray belongs to Ranunculaceae. The genus includes about 52 species worldwide. Here we report the diploid chromosome number and chromosome size and morphology for six Consolida species. For C. anthoroidea, C. leptocarpa, C. paradoxa and C. rugulosa the diploid chromosome number is reported for the first time. All investigated species have a diploid chromosome number of 2n = 2x = 16, except for C. persica having 2n = 2x = 14. The karyotypes of all six taxa are asymmetric, consisting of all four major chromosome types: metacentric, submetacentric, subtelocentric and telocentric chromosome type. However, considering the karyotype formula, all six species could be distinguished. In all taxa, metacentric chromosome pair 1 possesses a satellite. The only exception is C. rugulosa having an additional satellite positioned on metacentric chromosome pair 2. Karyotype data allow the separation of Aconitella from Consolida. Karyotype data plus morphological evidence support the reduction of C. paradoxa to formae level of C. rugulosa. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Developmental times of Synchaeta oblonga eggs from the Danube (Austria)

The relationship between temperature and development time of Synchaeta oblonga eggs from the Danube was investigated. Growth rates were also measured in populations established from the Danube.     

Comparative cellular localization of corticotropin and melanotropin in lerot adenohypophysis (Eliomys quercinus)

Summary Corticotropin and melanotropin producing cells were localized in the adenohypophysis of normal Lerots by using antibodies against synthetic corticotropins (anti 1–24 ACTH, anti 17–39 ACTH, anti 25–39 ACTH), and melanotropins (anti MSH, anti MSH). All the anticorticotropin sera stained the same cells both in the anterior lobe and in the intermediate lobe. The anti MSH serum only stained a few cells, exclusively located in the intermediate lobe. These MSH cells were not stained with anticorticotropin antibodies. The anti MSH serum revealed all the cells stained with anticorticotropin and anti MSH sera. Absorption tests showed that the 4–10 heptapeptide common to ACTH and MSH, is not responsible for the immunohistochemical staining. The staining of only some corticotrophs with the anti 4–10 ACTH serum might indicate the presence in these cells of a peptide with an accessible 4–10 site. These results are discussedWe thank A. Pillez for technical assistance (C.N.R.S.). This work was supported by a grant from U.E.R. III Lille 1976Attaché de Recherche INSERM     

The Karyotype of Chukotka Chars from the Estikhed Lake (Eastern Chukotka)

The karyotype of chars from the Estikhed Lake (Eastern Chukotka) was examined. This karyotype comprises 78 chromosomes, NF = 98. Marker chromosomes include one pair of submetacentrics, one pair of large acrocentrics, and one pair of large subtelocentrics with very short second arms. Nucleolus organizer regions are located in telomeric regions of short arms of marker submetacentric chromosomes. Small heterochromatin blocks are observed in centromeric regions of most chromosomes. The Chukotka char karyotype is very similar to that of Taranetz charSalvelinus taranetzi from the Achchen Lake: these karyotypes differ only in stability of the chromosome number.     

Chromosome Number and Karyotype of Silene gracilicaulis(Caryophyllaceae) from Hengduan Mountains

Chromosome numbers and karyotype of Silene gracilicaulis from Hengduan mountains were studied in this paper. The chromosome numbers are 2n = 24 , and the karyotype formula is 2n = 2x = 24 = 22m+ 2sm, and it belongs to 2A type .     

横断山区石竹科细蝇子草的染色体数目及核型报道

报道了石竹科细蝇子草(Silene gracilicaulis)的染色体数目及核型。染色体数目2n=24,染色体核型公式为2n=2x=24=22m 2sm,属2A核型。     

Trace fossils from Lower Miocene (Ottnangian) molasse deposits of Upper Austria

Lower Miocene siliciclastic sediments of the Vöckla Schichten and Atzbacher Sande, Austria, contain a shallow-water trace-fossil assemblage of the Cruziana ichnofacies includingSkolithos isp.,Planolites ? beverleyensis, Ophiomorpha annulata, O.nodosa, Rosselia socialis, Cylindrichnus concentricus, Scolicia isp., andBichordites monastiriensis. The ichnogenusRosselia and the ichnospeciesRosselia socialis are revised. Analysis ofScolicia isp. andB. monastiriensis provides new information about their morphology and ichnotaxonomy.     

Garden dormouse (Eliomys quercinus, Linnaeus 1766) without fenestration in angular process

One of the skull traits that separates the Leithiinae subfamily from other subfamilies of Gliridae family is a prominent fenestration in the angular process of the mandible. There is no reference in the literature of dormice from Leithiinae subfamily without this fenestration. However, some garden dormice (Eliomys quercinus) have been found without this fenestration in Spain. This lack of perforation may be due to an ossification of the angular process related to bone growth. Garden dormice skulls from different parts of Spain kept in two mammal collections were revised in order to detect animals without fenestration and to take measures that differ between young and adult dormice. The measures recorded did not differ between dormice with and without fenestration, and so, the entire angular process is not the result of an ossification process. Thus, the discovery of specimens without fenestration in the angular process should be taken into account in studies which need the identification of this species and other species from Leithiinae subfamily based on skull and mandibles traits.     

长春花核型的研究

对长春花属的长春花(Catharanthus roseus(L.)G.Don)、白长春花(C. roseus(L.)G.Don'Albus')和黄长春花(C.roseus(L.)G.Don'Flavus')的染色体数目和核型进行了研究.结果表明,它们的核型公式均为2n=2x=16=2m 12sm 2T,均属于"3A"核型,染色体数目均为2n=16,但它们的端部和中部着丝点染色体在核型分析中的排列次序不同.     

Karyotype of the cyprinid fish Alburnoides bipunctatus (Cyprinidae) from the Tigris River

Chromosome numbers and karyotypes of Cyprinid fish Alburnoides bipunctatus (Bloch, 1,782) from the River Tigris were determined by the chromosome preparation technique from uncultured kidney cells. The diploid chromosome number 2n=50, was composed of 8 pairs of metacentric, 11 pairs of submetacentric and 6 pairs of subtelo-acrocentric chromosomes (NF=88). Sex chromosomes were not determined in the this species. The results were briefly discussed with other, previously conducted studies.     

Karyotype analysis in Brachiaria (Poaceae) species

This is the first karyotype characterization of Brachiaria species. Twelve accessions belonging to five species were analysed. The basic chromosome number was x = 9 and 7, the same reported for the tribe Paniceae. Variations in the chromosome number were observed in B. decumbens (2n = 18; 36) and B. humidicola (2n = 36; 42; 54). Chromosome numbers of 2n = 18 in B. ruziziensis and 2n = 36 in B. brizantha and B. jubata were recorded. Inter- and intraspecific karyotype differentiation of the accessions analysed was facilitated by variations in karyotypic symmetry. The karyotypes were generally considered symmetrical, with a tendency to asymmetry in the direction of the polyploids. It is suggested that addition, deletions and mainly polyploidy have been the most direct causes involved in the chromosome evolution of this genus.