In 1991, a matched case-control study was performed in Norwegian freshwater hatcheries on risk factors for infection with Aeromonas salmonicida subsp. salmonicida, the causative agent of furunculosis. The study was based on repl~es to a questionnaire mailed to smolt producers, and included 30 infected and 66 non-infected hatcheries, matched by county. The odds ratios for infection with A, salmo...

Humans have dramatically altered landscapes as a result of urban and agricultural development, which has led to decreases in the quality and quantity of habitats for animals. This is particularly the case for freshwater fish that reside in fluvial systems, given that changes to adjacent lands have direct impacts on the structure and function of watersheds. Because choices of habitat have physio...

Background: This study investigated the effects of estradiol on plasma calcium and prolactin cells of Heteropneustes fossilis kept in calcium-deficient and normal freshwater. Methods: Fish were deprived of food and divided into groups A-D. Group A and B were kept in artificial freshwater with normal electrolytes. Group C and D were maintained in calcium-deficient freshwater. Vehicle was admin...

High rainfall associated with El Niño events significantly increases runoff and stream discharge in southern Brazil. High freshwater discharge changes salinity, temperature, and water circulation patterns that can affect the fish estuarine assemblage. Using long-term data obtained from standardized surveys, we analyzed fish assemblage structure and dynamics in shallow waters of the Patos Lagoon...

background:toxic contamination of fish may compromise food safety. haff disease is a rare syndrome characterized by rhabdomyolysis following consumption of cooked, freshwater fish. case report: a healthy 42 year old female presented three hours after eating fried buffalo fish (ictiobus cyprinellis). her symptoms began while eating the fish, described as diffuse muscle aches followed by generali...

Background:Toxic contamination of fish may compromise food safety. Haff disease is a rare syndrome characterized by rhabdomyolysis following consumption of cooked, freshwater fish. Case Report: A healthy 42 year old female presented three hours after eating fried buffalo fish (Ictiobus cyprinellis). Her symptoms began while eating the fish, described as diffuse muscle aches followed by generali...

The present paper deals with the piscicidal and muricidal (mice killing effect) activities of latex extract of Euphorbia royleana against freshwater snakehead fish, Channa punctatus and Swiss albino mice Mus musculus. Calculated values of lethal concentration (LC and LC ) showed that latex extract is toxic 50 90 against both the experimental animal. The toxicity of latex extract against freshwa...

Lactobacilli are Gram-positive and catalase negative rods commonly found in lactic acid fermented foods and in the gastrointestinal tract of mammals and birds. Few studies have described lactobacilli in freshwater fish. We analysed the presence of lactobacilli in the intestines of young and adult freshwater fish inhabiting a river environment and from fish reared in an aquaculture unit with a w...

Variations in levels of parasitism among individuals in a population of hosts underpin the importance of parasites as an evolutionary or ecological force. Factors influencing parasite richness (number of parasite species) and load (abundance and biomass) at the individual host level ultimately form the basis of parasite infection patterns. In fish, diet range (number of prey taxa consumed) and ...

The Asian fish tapeworm, Bothriocephalus acheilognathi, has been considered one of the most dangerous parasites for cultured carp and a risk for native freshwater fish populations worldwide. This cestode is highly pathogenic for fishes especially fry. In this paper we record B. acheilognathi parasitizing the endangered and endemic freshwater fish Profundulus hildebrandi from the endorheic basin...