نتایج جستجو برای: roach rutilus rutilus
تعداد نتایج: 1572 فیلتر نتایج به سال:
Biomanipulation by fish removal has been used in many shallow lakes as a method to improve lake water quality. Here, we present and analyse 30 years of chemical and biological data from the shallow and 16 ha large Lake Væng, Denmark, which has been biomanipulated twice with a 20-year interval by removing roach (Rutilus rutilus) and bream (Abramis brama). After both biomanipulations, Lake Væng s...
BACKGROUND The feminization of nature by endocrine-disrupting chemicals (EDCs) is a key environmental issue affecting both terrestrial and aquatic wildlife. A crucial and as yet unanswered question is whether EDCs have adverse impacts on the sustainability of wildlife populations. There is widespread concern that intersex fish are reproductively compromised, with potential population-level cons...
Event web site: http://www.oulu.fi/ltk/tutkimus/nobel Organizers: Faculty of Biochemistry and Molecular Medicine, Faculty of Medicine, Biocenter Oulu, and Medical Research Center Oulu More information: Peppi Karppinen, [email protected] Where: Lecture Hall K101, Aapistie 7A When: Oct 3, 11:30 – 13:30 To whom: University and Hospital personnel, researchers, students © The Nobel Foundation ...
Mixtures of estrogenic contaminants in bile of fish exposed to wastewater treatment works effluents.
Most effluents from wastewater treatment works (WwTWs) contain estrogenic chemicals that include steroidal estrogens and xenoestrogens. We investigated the nature of mixtures of estrogenic contaminants taken up by two species of fish exposed to two WwTWs effluents. Sexually immature rainbow trout, Oncorhynchus mykiss, and sexually mature roach, Rutilus rutilus, were exposed to tap water, river ...
In this study, quantitive characteristics and chemical composition of in roach (Rutilus rutilus caspicus) sperm were investigated. Sperm traits included sperm movement duration, percentage of motile spermatozoa, sperm density, spermatocrit and sperm volume. Some seminal plasma characteristics (sodium, potassium, calcium, magnesium and chloride) were investigated. In addition, some metabolites o...
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