In a previous study we showed that broods from the viviparous eelpout Zoarces viviparus were significantly male biased in 1998 in the vicinity of a large kraft pulp mill on the Swedish Baltic coast. One suggested hypothesis was that masculinizing compounds in the effluent were affecting gonadal differentiation of the embryos, resulting in skewed sex ratios. In this article, we present further e...

Zebrafish in our laboratory are usually bred by removing the fish from the recirculating aquatic system and placing them into 1-2 L spawning tanks. These spawning tanks consist of a bottom reservoir, a lid, and an insert that fits in closely into the bottom reservoir. When the fish breed, the eggs fall through holes of the insert and into the reservoir, thus preventing them from being cannibali...

The possible ecotoxicological effects of a paper and pulp mill effluent were investigated by measuring selected contaminants and biomarkers in caged Nile tilapia (Oreochromis niloticus) and sharptooth catfish (Clarias gariepinus) from the Karnaphuly River, Bangladesh. Fish were caged for 28 d at two upstream reference sites (2 and 4 km) and four downstream sites (3, 5, 8, and 12 km) from the ef...

Coral-associated gobies are highly specialized reef fishes with high host-coral fidelity. Flexibility in habitat choice, however, is important to compensate for potential habitat alteration or loss, but detailed information about the postsettlement movement behavior of such gobies is lacking. We examined movement patterns in Gobiodon histrio, both under natural conditions and during subsequent ...

Migratory behavior can be an important factor in determining contaminant exposure in avian populations. Accumulation of organochlorine (OC) pesticides while birds are wintering in tropical regions has been cited often as the reason for high concentrations in migrant populations. To explore this issue, we satellite tracked 16 Ospreys (Pandion haliaetus) over the period 1996-2003 from breeding si...

this experiment was designed to evaluate the effect of dietary caspian kilka fish oil on breast meat fatty acid (fa) profile and as well as sensory acceptability of breast meat. fish oil supplementation was added to provide four graded levels (0, 1, 2, and 3% fish oil) in place of vegetable oil for supporting 3% oil in the diet during the period of breeding. these four diets were allocated to o...

Qualitative and quantitative histological alteration was taken to analyze in fish Oreochromis mossambicus collected from Kedilam River at three stations, which receive mostly industrial effluent and municipal runoff. Histoarchitecture of tissue alteration and percentage of prevalence was used as protocol for analysis. Results showed that number of histological alteration observed in gill like s...