The goldfish (Carassius auratus) visual pathway displays continuous growth and plasticity throughout life. Since homeobox genes are important transcriptional regulators in development, we searched for homeobox genes in the adult goldfish retina and brain. Using the PCR, we discovered a repertoire of homeobox sequences expressed in these tissues. In addition to isolating homeodomain sequences fo...

Goldfish (Carassius auratus) were reared in two recirculating systems initially under the same settings and UV conditions for period of 100 days. Halfway through the experiment, the supply of the UV irradiation in one the setting was discontinued. Several water quality parameters were monitored in both settings at the two different times. The results indicate that UV systems enhanced the growth...

Acute ammonia toxicity in vertebrates is thought to be characterized by a cascade of deleterious events resembling those associated with anoxic/ischemic injury in the central nervous system. A key event is the over-stimulation of neuronal N-methyl-D-aspartate (NMDA) receptors, which leads to excitotoxic cell death. The similarity between the responses to acute ammonia toxicity and anoxia sugges...

Argulus foliaceus (Crustacea: Branchiura), or the fish louse, is an ectoparasite of the skin or gill of the fresh water fish species. Clinical signs in infected fish include scratching on aquarium walls, erratic swimming, and poor growth. It causes pathological changes due to direct tissue damage and secondary infections. In the present study, lionhead goldfish (Carassius auratus), taken from a...

Abstract NaCl has beneficial effects in preventing fish disease. However, the of regulating growth and survival at different food supply levels under hypoxic conditions are unknown. Herein, on body weight, rate (SR), H 2 O content, lipid peroxidation, protein carbonylation, antioxidant (superoxide dismutase [SOD], catalase [CAT], glutathione peroxidase [GPX]) enzyme activities, (GSH) content we...

Three cytoplasmic proteins (designated alpha, beta and gamma) in the goldfish brain consistently incorporated more labeled valine in animals that had acquired a new pattern of swimming behavior than in untrained animals. The changes were identified by double labeling techniques ([3H]valine injected into trained experimental animals and [14C]valine into untrained controls) and by gel-electrophor...

Contemporary ecosystems commonly support multiple non-native species, which can alter community structure and directly or indirectly interact with one another. Novel interactions between invasive species result in the facilitation suppression of both invaders, making it important to understand underlying mechanisms that affect invasion outcomes. Goldfish Carassius auratus Chinese mystery snails...

The ability of antibiotics to inhibit acetylcholinesterase was measured in homogenates of goldfish brain. Puromycin aminonucleoside was the most potent inhibitor followed by puromycin, cycloheximide and acetoxycycloheximide. Puromycin effectively impaired retention of active-avoidance learning in goldfish when injected either immediately before or after training, while puromycin aminonucleoside...

The ability of lower vertebrates to regenerate an injured optic nerve has been widely studied as a model for understanding neural development and plasticity. We have recently shown that, in goldfish, the optic nerve contains two molecules that stimulate retinal ganglion cells to regenerate their axons in culture: a low-molecular-weight factor that is active even at low concentrations (axogenesi...