Organisms must adapt to the temporal characteristics of their surroundings to successfully
survive and reproduce. Variation in the daily light cycle, for example, acts through endocrine …

Previous reviews of stress, and the stress hormone cortisol, in fish have focussed on
physiology, due to interest in impacts on aquaculture production. Here, we discuss cortisol in …

Circadian rhythms control the life of virtually all organisms. They regulate numerous aspects
ranging from cellular processes to reproduction and behavior. Besides the light-dark cycle …

Although several studies have described effects of meal frequency and timing of meals on
growth performance and body composition of different species of fishes, the mechanisms by …

Publisher Summary This chapter discusses the chemical properties of the blood of fishes.
The levels of many plasma constituents exhibit daily variations that can modify and …

The sensitivity of reproductive function to the influence of environmental stressors in
vertebrates has been clear since the late 1930's, as have the stressing effects of …

Maternal immunity is of paramount importance for protection of young ones at early stage of
life since the immune factors of an immunocompetent female are transferred transplacentally …

The environment which living organisms inhabit is not constant and many factors, such as
light, temperature, and food availability, display cyclic and predictable variations. To adapt to …

The purpose of this article is to provide a bibliography of publications that describe the
effects of organic and inorganic chemical contaminants on serum chemistry and hematology …

Androgens are classically thought of as the sex steroids controlling male reproduction.
However, in recent years evidence has accumulated showing that androgens can also be …