Nephrocalcinosis is a chronic disorder which may be resulted in decrease in growth rate and finally mortality in severe condition. Nephrocalcinosis is defined as the presence of calcification in the kidney. A total number of 80 ornamental fishes of different species included of discus fish (Symphysodon discus), angelfish (Pterohyllum sp.), goldfish (Carassius auratus) and oscar fish (Astronotus...

We tested the effect of social isolation on the aggressiveness of an Amazonian fish: Astronotus ocellatus. Ten juvenile fishes were transferred from a group aquarium (60 x 60 x 40 cm) containing 15 individuals (without distinguishing sex) to an isolation aquarium (50 x 40 x 40 cm). Aggressiveness was tested by means of attacks on and displays toward the mirror image. The behavior was video-reco...

At Chapel Hill, Chapel Hill, North Carolina; Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; Sistemas Locales de Atención Integral a la Salud, León (SILAIS-León), Leon, Nicaragua; Hospital Escuela Oscar Danilo Rosales Argüello (HEODRA), León, Nicaragua, Leon, Nicaragua; Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill...

JOHN D. MCVAY*, OSCAR FLORES-VILLELA and BRYAN CARSTENS Department of Biological Sciences, Louisiana State University, Baton Rouge, LA, 70803, USA Facultad de Ciencias, Museo de Zoologia, Universidad Nacional Autonoma de Mexico, Circuito Extrior de CU, Mexico, DF, 04510, Mexico Department of Evolution, Ecology and Organismal Biology, The Ohio State University, 318 W. 12th Avenue, Columbus, OH, ...

Early-life exposure to mild stressors can assist animals in coping with more stressful events later life. This study was aimed at investigating how early stress and dietary lipid contents affect growth, hematology, blood biochemistry, immunological responses, antioxidant system, liver enzymes, responses of oscar (Astronotus ocellatus) ( ...