This study was conducted in Oymapınar Dam Lake from March 2016 to February 2017. The investigated the age composition, spawning season, sex ratio, first sexual maturity, and fecundity of chub (S. anatolicus). ages 422 chubs sampled ranged II VIII which 200 (47.39%) were females 222 (52.61%) males. fork lengths weights female varied between 20.0 cm 55.1 93.37 g 2307.88 respectively. oldest group...

23 In the San Francisco Estuary, management actions including tidal marsh restoration could 24 change fish mercury (Hg) concentrations. From 2005 to 2007, small forage fish were 25 collected and analyzed to identify spatial and interannual variation in biotic 26 methylmercury (MeHg) exposure. The average whole body total Hg concentration was 27 0.052 µg g-1 (wet weight) for 457 composite sample...

— New synonymy is proposed as follows: Pityokteines Fuchs { = Orthotomides Wood), Araptus foveifrons (Schedl) { = interjectus Wood), n. comb., Cryptocarenus seriatus Eggers { = bolivianus Eggers), Hylastes gracilis LeConte {=asper Swaine), Procryphalus utahensis Hopkins {=aceris Hopkins), Scolytodes maurus (Blandford) {=Hexacolus ellipticus Eggers), Scolytus hermosus Wood {=sylvaticus Bright), ...

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...

The relative importance of plant facilitation and competition during primary succession depends on the development of ecosystem nutrient pools, yet the interaction of these processes remains poorly understood. To explore how these mechanisms interact to drive successional dynamics, we devised a stoichiometric ecosystem-level model that considers the role of nitrogen and phosphorus limitation in...

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...