We previously found a linear relationship between the cross sectional myotomal area and the motoneurone number in the growing trout during postlarval stages. These neurones increased in number until a fish length of 150 mm, which prompted us to examine how motor neurones are recruited afterwards to meet the growth of their target myotomal muscle. Young adult (260 mm in length), fingerlings (F, ...

The grass shrimp (Palaemonetes vuigaris) orients itself by means of the polarization pattern of the sky visible through Snell's window of the water surface. The celestial polarization pattern viewed from water is distortt.~! and modified because of refraction and repolarization of skylight at the air-water interface. This work provides a quantitative account of the repolarization of skylight tr...

We have isolated a large virus from pike-perch Stizostedion lucioperca fingerlings with no signs of disease. The biochemical structural, and serological properties of this newly isolated virus suggest that it belongs to the family Iridoviridae. The virus multiplied and was cytopathogenic in several cultured fish cell lines. The virus has a DNA-containing genome and is assembled in the cytoplasm...

The grass shrimp (Palaemonetes vulgaris) orients itself by means of the polarization pattern of the sky visible through Snell's window of the water surface. The celestial polarization pattern viewed from water is distorted and modified because of refraction and repolarization of skylight at the air-water interface. This work provides a quantitative account of the repolarization of skylight tran...

Although the number of studies documenting presence Microplastics (MP) in fish is increasing, research focused on its detoxification are very limited. In this study, rainbow trout (Oncorhyncus mykiss) were randomly divided into two groups after being fed with MPs (15% polypropylene [PP] +15% polyethylene [PE]) for 2 months. MP excretion without any application (PP+PE) group I fish, and hydrogen...

Vanderkloof Dam was periodically sampled between November 2014 and April 2016 for a range of water quality parameters to assess the potential cage culture rainbow trout, Oncorhyncus mykiss. The dam is strongly stratified in summer autumn, although upper column temperatures remain relatively cool, largely <25°C. considered oligotrophic, characterised by phosphorus limitation primary productio...

Efficient water treatment is required to maintain high quality and control microbial growth in recirculating aquaculture systems (RAS). Here, we examined the effects of two methods, ozonation foam fractionation, separately combined, on microbiology twelve identical experimental RAS with rainbow trout (Oncorhyncus mykiss) during 8 weeks. Microbes suspended growing biofilter biofilms were using f...