Previous studies have shown that assortative mating acts as a driver of speciation by countering hybridization between two populations of the same species (pre-zygotic isolation) or through mate choice among the hybrids (hybrid speciation). In both speciation types, assortative mating promotes speciation over a transient hybridization stage. We studied mate choice in a hybrid vertebrate complex...

OBJECTIVE This study was conducted to determine the prevalence of Ligula intestinalis and infections caused by these on freshwater fish in rivers and streams in the Kars plateau of north-eastern Anatolia, Turkey. METHODS This research was conducted between April and July 2011. Fish samples were caught via a casting net and an electro-shocker. The samples were immediately examined to determine...

The accumulation of iron, zinc, copper and cobalt in the muscles of three freshwater fish (Cyprinus carpio, Squalius cephalus and Capoeta umbla) from Keban Dam Lake (Turkey) were investigated between September 2009 and April 2010. The concentration of heavy metals were found as Zn>Fe>Cu>Cd respectively. A positive relationship was found between heavy metal levels and fish size. The levels of al...

Capoeta buhsei is native species in the Namak Lake basin and biological aspects of life history of this fish in Iranian waters is not very well known. Life history of this fish examined by collecting 92 samples in Gharachay River. Sampling done by using Electroshoker in July and January 2011 and October 2012. The maximum age was found +4 years in female. Sex Ratio (male: female) was 1:0.73, and...

Aim In this study, fish species living in the Elekçi Stream, which poured from borders of Fatsa District Ordu Province to Black Sea, were determine as taxonomical. Material and Methods samples taken Bolaman Rivers using an electroshock device six pre-determined stations between January 2017 October 2018. Specimens brought laboratory. The then stored formaldehyde solution (4%) for further examin...

This study assessed the distribution of heavy metals in gills, kidney, and liver, correlated with severity histopathological changes, three fish species different feeding habitats (Barbus barbus, Squalius cephalus, Chondrostoma nasus) from Cri?ul Negru river, Romania. The levels copper (Cu), chromium (Cr), cadmium (Cd), lead (Pb), zinc (Zn) tissues were measured by atomic absorption spectrophot...

The North American invasive fish pumpkinseed Lepomis gibbosus has been associated with some detrimental ecological consequences in parts of its range. Here, we tested the trophic interactions endemic stream Aegean chub Squalius fellowesii (‘chub’) a Mediterranean-type water course SW Anatolia, Turkey, using bulk stable isotope approach (δ 13 C, δ 15 N). Seven sampling sites were able to be grou...