České Budějovice, Czech Republic
České Budějovice, Czech Republic

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Romer U.,Laboratoire Mixte International Evolution Et Domestication Of Lichtyofaune Amazonienne | Romer U.,University of Trier | Beninde J.,Laboratoire Mixte International Evolution Et Domestication Of Lichtyofaune Amazonienne | Beninde J.,University of Trier | And 15 more authors.
Vertebrate Zoology | Year: 2012

A new species of Apistogramma is described from Peru, based on a total of 51 specimens collected in small forest brooks in and around the Reserva Nacional Allpahuayo Mishana in the drainage of the Nanay river basin about 30 kilometres southwest of Iquitos, Departamento Loreto (approximately 73° 25' W/03° 59' S). Apistogramma allpahuayo sp. n. is distinguished from all other Apistogramma species by the combination of black w-shape marking on lower jaw, (in adult males) lyrate caudal fin, massive jaws and hypertrophied orange lips, distinct roundish caudal-peduncle spot clearly separated from lateral band ending at vertical bar 7, serrated dorsal fin with conspicuous extensions of first membranes, and proportions of dorsal-fin spines differing from those otherwise typical within genus. Apistogramma allpahuayo sp. n. is thought to be a representative of the Apistogramma cacatuoides complex within the Apistogramma cacatuoides lineage. © Museum für Tierkunde Dresden.


Oberkircher L.,Institute of Landscape Ecology | Shanafield M.,Flinders University | Ismailova B.,ZEF UNESCO Khorezm Project | Saito L.,University of Nevada, Reno
Ecology and Society | Year: 2011

Transformation of the Khorezm region of Uzbekistan from forested to agricultural landscapes resulted in the formation of hundreds of lakes, the dynamics of which are largely controlled by inputs from irrigation runoff waters. The importance of the ecological and socio-cultural dimensions of one of these lakes, Shurkul, is discussed in order to understand the connection between humans and their environment. Landscape is used as a boundary concept, and we combine quantitative methods of the natural sciences with qualitative methods of the social sciences to assess these dimensions of the lake landscape. In the ecological dimension, Shurkul performs a wide range of ecosystem services from wildlife habitat and foodweb support to the provision of fish, fodder, building material and grazing ground. In the socio-cultural dimension, the lake is part of local ecological knowledge, functions as a prestige object and recreational site, and is rooted in religious beliefs of the population as a symbol of God's benevolence. The Shurkul landscape may thus create a feeling of environmental connectedness and the desire to act in favor of the natural environment, which could be made use of in environmental education programs. © 2011 by the author(s).


Romer U.,University of Trier | Beninde J.,University of Trier | Hahn I.,Institute of Landscape Ecology | Hahn I.,University of Santiago de Chile
Vertebrate Zoology | Year: 2011

Apistogramma playayacu sp. n. Is described based on a total of 41 specimens from tributaries of the Rio Napo from the border area between Ecuador and Peru (about 76°36′ W // 00°22′ S). The species is distinguished from all other Apistogramma species by the combination of 7 to 8 horizontal rows of mostly triangular black spots along the sides, horizontally devided spot on caudal base, rounded caudal fi n, and straight narrow cheek stripe. The species is a moderately large (males up to 49 mm, females to 38 mm SL), high-backed, laterally compressed, and only slightly elongated Apistogramma species. Apistogramma playayacu sp. n. probably belongs to the Apistogramma macmasteri complex within the Apistogramma regani lineage (sensu Römer, 2006), and exhibits pronounced sexual dimorphism.


Romer U.,University of Trier | Hahn I.,Institute of Landscape Ecology | Hahn I.,University of Santiago de Chile
Vertebrate Zoology | Year: 2013

A new species of Apistogramma, Apistogramma aguarico sp. n., is described from Ecuador, based on a total of 9 specimens collected from an oxbow lake (appr. 09°47′ S/75°57′ W) connected to the Rio Lagartococha, an affluent of the Rio Aguarico, which is part of the Rio Napo system in the north east of Ecuador close to the border with Peru. Apistogramma aguarico sp. n. is distinguished from all other Apistogramma species by the combination (in adult males) of: truncate unmarked caudal fin with streamer-like extensions to both upper and lower lobes in large individuals; four irregular abdominal lines formed by series of highly variable spots; serrate dorsal fin with membranes clearly prolonged past tips of spines; and ivory spot surrounding and including pectoral-fin base. The species is thought to be a representative of the Apistogramma eunotus complex within the Apistogramma regani lineage. © 2013 Senckenberg Gesellschaft für Naturforschung.


Uzun L.,Hacettepe University | Saglam N.,Hacettepe University | Safarikova M.,Institute of Landscape Ecology | Safarik I.,Institute of Landscape Ecology | Denizli A.,Hacettepe University
Separation Science and Technology | Year: 2011

Brewer's yeast (bottom yeast, Saccharomyces cerevisiae subsp. uvarum) cells were magnetically modified using water-based magnetic fluid stabilized perchloric acid. The magnetically modified yeast cells were characterized by scanning electron microscopy (SEM). Cu2+ biosorption properties of magnetically modified yeast cells from synthetic solutions were utilized in a continuous magnetic system. The Cu2+ ion-binding capacity decreased drastically with the increase of the flow rate. The maximum Cu2+ biosorption capacity was obtained to be 1.2 mmol/g at 25°C. Biosorption of Cu2+ increased with increasing pH and then reached almost a plateau value around pH 4.0. The yeast biomass can be easily regenerated by 0.1MHNO3 with higher effectiveness. Biosorption of heavy metal ions from artificial wastewater was also studied. The biosorption capacities are 0.92 mmol/g for Cu2+, 0.52 mmol/g for Hg2+, and 0.28 mmol/g for Ni2+. Magnetically-modified yeast cells exhibits the following metal ion-affinity sequence: Cu2+ > Hg2+ > Ni2+. © Taylor & Francis Group, LLC.

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