In this study, the fish species inhabiting Bolaman Stream drains to Black Sea from Fatsa coast (Ordu Province, Turkey) was reported for first time. The study caught out non-periodically by sampling seven stations in between July 2017 and November 2018. Fish samples were captured with an electroshock device. With it determined that fauna of is represented 10 five families (Acheilognothidae, Cypr...

Sex-reversed females are the fathers of all-female fish and their sperm quality directly affects fish. In this study, fecundity, physiological characteristics, biochemical ultrastructure, viability sex-reversed female after cryopreservation were investigated to understand quality. (1) The had a lower fertilization rate, hatching larval survival rate 72 hr higher deformation compared with normal...

Abstract Fluvalinate and esfenvalerate are pyrethroid insecticides used to control insect pests. These pesticides can enter the aquatic environment in different ways after use, causing toxicity. Tarek is a fish of Cyprinidae family native Lake Van basin Turkey. This study was conducted determine acute toxicity fluvalinate adult tarek. In bioassays, tarek with an average length 20.6±1.2 cm weigh...

Samples of liver and kidney of Little Blue Heron (Egretta caerulea) collected on Sepetiba Bay, Rio de Janeiro, Brazil, were analysed for their copper, zinc, cadmium, lead, chromium and nickel content. Mean concentration levels in liver and kidney (μg.g dry weight) were 6.32955 and 6.57136 (Cd); 78.17409 and 96.89409 (Zn); 44.01727 and 65.20864 (Cu); 41.15091 and 39.62318 (Pb); 2.80091 and 4.164...

Normal observers color-adapted simultaneously to two spatially distinct sequencesof light stimulation, equivalent in their bleaching effects but complementary to one anotherin hue. Following the adapting period, observers reported on the color appearance of the twoadjacent after-images seen against a neutral background. The nonequivalence of the two after-images argues against t...

Many avian species in Europe breed earlier as a result of higher temperatures caused by global climate changes. Climate change means not only higher temperatures but also more frequent extreme weather events, sometimes contrasting with the long-term trends. It was suggested that we should look closely at every extreme phenomenon and its consequences for the phenology of organisms. Examining the...

Livers from 108 birds found prostrate or dead in Ilha Grande Bay between 2005 and 2010 were analyzed for 16 PCB congeners (IUPAC numbers 8, 18, 28, 31, 52, 77, 101, 118, 126, 128, 138, 149, 153, 169, 170, and 180). The species analyzed were Egretta caerulea (Linnaeus 1758), Nycticorax nycticorax (Linnaeus 1758), Egretta thula (Molina 1782), and Ardea cocoi (Linnaeus 1766). The analysis were per...

A cornerstone of ecological theory is the ecological niche. Yet little is known about how individuals come to adopt it: whether it is innate or learned. Here, we report a cross-fostering experiment in the wild where we transferred eggs of blue tits, Cyanistes caeruleus, to nests of great tits, Parus major, and vice versa, to quantify the consequences of being reared in a different social contex...