The authors investigated mycoflora developing on the eggs of three species of the percid fish. At total of 45 aquatic fungi (including 26 as parasites or necrotrophs) were noted. Pythium capillosum is a new record for Poland. The highest number of fungus species developed on eggs of all percids in water from the Biala river, which had the highest content of biogenic compounds.

The eggs of the zebra fish Brachydanio rerio (Hamilton-Buchanan) were used in these studies. Roosen-Runge (1936, 1938, 1939), Marrable (1959,1962a) and others have described various aspects of the biology of this fish when maintained in the laboratory. It is a freshwater tropical teleost, the females laying nonsticky, non-pigmented demersal eggs which undergo a regular and predictable pattern o...

Daily instantaneous natural mortality rates of marine pelagic fish eggs and larvae are higher than expected from the trend of mortality rate with dry weight in the sea. The difference between observed mortality rates and those predicted from the trend of mortality with dry weight is directly and positively correlated with the patchiness of their spatial distribution, which suggests that it is c...

The effects of incorporating conjugated linoleic acid (CLA) and fish oil in laying hen diets on egg CLA, n-3 fatty acid, tocopherol, and TBA reactive substances (TBARS) during 60 d of storage were investigated. Hens were fed corn-soybean meal-based diets containing 3% yellow grease (YG), 2.75% yellow grease + 0.25% CLA (YG-CLA), 2.5% yellow grease + 0.25% CLA + 0.25% fish oil (YG-CLA-FO), or 2....

Most fish embryos that develop externally are exposed to an environment full of microbes. How they survive microbial attacks are not understood to date. Here we demonstrated that the egg cytosol prepared from the newly fertilized eggs of zebrafish Danio rerio is capable of killing the Gram-negative bacterium Escherichia coli, via in vitro assay system of the complement activity established. All...

Many salmonid species have recently become at risk of extinction. For fish species where eggs cannot be cryopreserved, establishment of techniques to preserve genetic resources other than egg and embryo cryopreservation is imperative. In the present study, spermatogonia from male trout were transplanted into the peritoneal cavity of newly hatched sterile triploid salmon. Transplanted trout sper...

Fish are known for their high phenotypic plasticity in life-history traits in relation to environmental variability, and this is particularly pronounced among salmonids in the Northern Hemisphere. Resource limitation leads to trade-offs in phenotypic plasticity between life-history traits related to the reproduction, growth, and survival of individual fish, which have consequences for the age a...

"Furunculosis," a highly infectious disease of the Salmonidae caused by Bacterium salmonicida Lehmann and Neumann (Emmerich and Weibel, 1894; Lehmann and Neumann, 1920; Marsh, 1902; Williamson, 1928; Mackie, et al., 1930; Duff and Stewart, 1933; Fish, 1937), received its name from the boillike lesions that occur in the musculature of the infected fish. The "furuncles'" often break through the s...

This study provides fundamental information on some key aspects of the reproductive traits of qanati tailor fish, Alburnoides qanati, an Iranian endemic, poorly studied cyprinid fish species. Sampling was performed on a monthly basis during one year (from March 2011 through February 2012) from a tributary of endorheic Kor River Basin, Southern Iran. The results of data analyzing showed that the...

We present a paleoparasitological analysis of the medieval Zeleniy Yar burial ground of the XII-XII centuries AD located in the northern part of Western Siberia. Parasite eggs, identified as eggs of Opisthorchis felineus, were found in the samples from the pelvic area of a one year old infant buried at the site. Presence of these eggs in the soil samples from the infant's abdomen suggests that ...