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Journals and Conferences
We sampled the Baía River (Mato Grosso do Sul State, Brazil) monthly, to survey taxonomic composition and temporal and spatial distribution of fish larvae. The ichthyoplankton was mainly composed by larvae of small and medium sized sedentary species and it was numerically dominated by six taxa: Plagioscion squamosissimus, Hypophthalmus edentatus, Hoplias… (More)
F. E. Becerra*, J. Fan, G. Baumgartner, J. Goldhar, J. T. Kosloski, and A. Migdall Joint Quantum Institute, University of Maryland, and National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899 Laboratory for Telecommunications Sciences, 8080 Greenmead Drive, College Park, MD 20740 Department of Electrical and Computer… (More)
F. E. Becerra,1,* J. Fan,1 G. Baumgartner,2 S. V. Polyakov,1 J. Goldhar,3 J. T. Kosloski,4 and A. Migdall1 1Joint Quantum Institute, Department of Physics, University of Maryland, and National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, Maryland 20899, USA 2Laboratory for Telecommunications Sciences, 8080 Greenmead Drive, College… (More)
We analyzed the ontogenetic shifts in digestive tract morphology and diets of the young of Iheringichthys labrosus, Hypophthalmus edentatus and Plagioscion squamosissimus, sampled in the Itaipu Reservoir, Brazil-Paraguay. We described the dental structures, the gill rakers and the digestive tract, and analyzed the diet of the young fish. We observed teeth… (More)
We studied the timing of migratory fish spawning in the last dam-free stretch of the upper Paraná River and in Itaipu Reservoir. Eggs were more common in the Amambai and Ivaï Rivers, while larvae predominated in the Paraná River and in Itaipu Reservoir. Both eggs and larvae were more abundant at night. The highest abundance of eggs was in October and that… (More)
The aim of this study was to characterize spatial trends in composition and structure of the fish assemblages in Ilha Grande National Park, located on the Upper Paraná River. Fish were caught bimonthly between October 2001 and August 2002 with gillnets of different mesh sizes at 10 sampling sites. Over the course of the study, 9,858 fish were collected,… (More)
Success in fish breeding depends on reproduction intensity, periodicity and the place where it occurs. Information about fish species reproduction is important to assist managers, and to determine conservation and management strategies. The fish assemblage of the Iguaçu River basin is already known for its high endemism, and despite this privilege, the… (More)
The author reports that in Germany animal welfare gets increasing importance in public opinion. He informs on the status of animal welfare legislation in the EU as well as in the Federal Republic of Germany.
Numerous scientific investigations and discussions on the improvement of farm animal protection have been carried out during the last fifteen years. Following these steps, today also the legal directions have reached a concrete phase. On January 1st 1988, e.g., the decree on battery husbandry of laying hens was enacted and on July 1st the decree on indoor… (More)
The author gives a survey on the actual discussions and negotiations to amend the German Animal Welfare Act. Additionally, he reports about preparations to amend existing and to implement new animal welfare regulations.