This study was undertaken to determine the assimilation rate of goldfish, Carassius auratus, when given a diet of high carbohydrate, or high protein concentration since some foods are generally better assimilated than others. Two similar experiments were conducted over a period of two weeks. The assimilation rate for a high carbohydrate diet, combination diet of protein and carbohydrates, and h...

Exposure to estrogenic endocrine disruptors (EDCs) during development affects fertility, reproductive and non-reproductive behavior in mammals and fish. These effects can also be transferred to coming generations. In fish, the effects of developmental EDC exposure on non-reproductive behavior are less well studied. Here, we analyze the effects of 17α-ethinylestradiol (EE2) on anxiety, shoaling ...

Social interactions among multiple user groups of tank irrigation systems were studied to propose policies for sustainable management of tanks. Crop growers are the major competitors for water besides encroachers, fish and duck farmers. Existence of week property rights remained as the reason for the competition among users that subsequently led to conflicts. Conflicts aroused among user groups...

in this study, 307 samples of the sediments of fish breeding pools of the different parts of north of iran were tested for the survey of different environmental mycobacteria. after the process of cultivation, 107 cases of mycobacterium were gained which after the performance of different biochemical tests. 112 cases of mycobacterium were identified. from among the isolated mycobacteria, the hig...

Water temperature was elevated and maintained in two of three fish production systems which incorporated biofiltration and hydroponics. Channel catfish (Ictaluruspunctatus) were stocked in indoor fish tanks and fed to satiation once daily. Tomatoes (Lycopersicon esculentum) were planted in outdoor hydroponic tanks. The study was conducted during the 1979 growing season. Afternoon water temperat...

Socially stressful environments induce a phenotypic dichotomy of coping measures for populations in response to a dominant aggressor and given a route of egress. This submission- (Stay) or escape-oriented (Escape) dichotomy represents individual decision-making under the stressful influence of hostile social environments. We utilized the Stress-Alternatives Model (SAM) to explore behavioral fac...

The misfolding of cellular prion protein (PrPC) to form PrP Scrapie (PrPSc) is an exemplar of toxic gain-of-function mechanisms inducing propagated protein misfolding and progressive devastating neurodegeneration. Despite this, PrPC function in the brain is also reduced and subverted during prion disease progression; thus understanding the normal function of PrPC in healthy brains is key. Disru...

Health monitoring systems are developed and used in zebrafish research facilities because pathogens of Danio rerio such as Aeromonas hydrophila, Mycobacterium spp., and Pseudocapillaria tomentosa have the potential to impair animal welfare and research. The fish are typically analyzed post mortem to detect microbes. The use of sentinels is a suggested way to improve the sensitivity of the surve...

background: in recent years, many studies have been conducted on finding a suitable replacement for fish meal to supply the needs of aquaculture feed industry. objectives: the present study was performed to examine the effect of replacing fish meal and fish oil with plant sources on bacterial counts in intestinal contents and mucus and bacterial composition in beluga sturgeon. methods: beluga s...