Pyrethroids are commonly used insecticides that are considered to pose little risk to human health. However, there is an increasing concern that children are more susceptible to the adverse effects of pesticides. We used the zebrafish model to test the hypothesis that developmental exposure to low doses of the pyrethroid deltamethrin results in persistent alterations in dopaminergic gene expres...

The larval development of the endangered freshwater mussel Margaritifera margaritifera (L.) represents one most unique parasitism among naiads, in which larva parasite fish gills for several months. Despite importance this parasitic phase to successfully culture mussel, morphogenesis remains understudied. To describe and metamorphosis, Atlantic salmon (Salmo salar L.) were exposed glochidia, sa...

owing to reduction of sturgeon stocks in various water bodies, artificial propagation has become significantly important for stock restoration and appropriate broodstock selection is vital in this process. selection of suitable broodstocks may influence the quality and quantity of obtained eggs and larva. the present study aimed to examine correlation between some morphometric and reproductive ...

Tribenuron metil tarımda çok yıllık dikotları kontrol etmek için kullanılan herbisittir. Sucul ekosistemlere yeraltı suyu yoluyla erişebilir ve sucul yaşamı etkileyebilir. Zebra balığı (Danio rerio Hamilton, 1822), kolay üreme kapasitesine şeffaf embriyolara sahip olan bu yüzden bilimsel çalışmalarda sıkça tercih edilen bir omurgalı modelidir. Bu çalışmada tribenuron zebra balıkları üzerinde 12...

Paraeuchaeta norvegica (8.5 mm total length) and yolk-sac stage Atlantic cod larvae (4 mm total length) (Gadus morhua) larvae were observed in aquaria (3 l of water) using silhouette video photography. This allowed direct observations (and quantitative measurement) of predator–prey interactions between these two species in 3-dimensions. Tail beats, used by cod larvae to propel themselves throug...

Ninety-five eels from one marine and three freshwater localities in Iceland were examined for parasites. Twenty species were found, 12 from marine habitat, 12 from freshwater and 4 species were found in both habitats. These are: Eimeria anguillae, Chilodonella hexasticha, Trichodina fultoni, T. jadranica, Myxidium giardi, Myxobolus kotlani, two Zschokkella spp., Derogenes varicus, Deropristis i...

Adult zebrafish are robustly social animals whereas larva is not. We designed an assay to determine at what stage of development zebrafish begin to interact with and prefer other fish. One week old zebrafish do not show significant social preference whereas most 3 weeks old zebrafish strongly prefer to remain in a compartment where they can view conspecifics. However, for some individuals, the ...

Oceanic threespine sticklebacks have repeatedly and independently evolved new morphologies upon invasions of freshwater habitats. A consistent derived feature of the freshwater form across populations and geography is a shape change of the opercle, a large early developing facial bone. We show that the principal multivariate axis describing opercle shape development from the young larva to the ...