Few studies have systematically investigated mid- or long-term temporal changes of biological characteristics in invasive alien species considering the different phases of an invasion. We studied the invasion performance of one of the most invasive species worldwide, the round goby Neogobius melanostomus, from total absence over first occurrence until establishment from 2010 to 2015 in the uppe...

In this study 288 length-weight relationships of some fish species from the Turkish coasts Black Sea were gathered 138 studies, which conducted by several researchers between 1989 and 2021. For all species, “b” values ranged 2.49 for Trachurus trachurus to 3.75 Alosa caspia. The expected range 2.5<b<3.5 is confirmed fish. It thought that high b value (3.75) given A. caspia may be ...

Invasive species often have rapid and far-reaching negative impacts on populations and ecological communities. These effects are most common when invasive species have few competitors or predators. Although higher level carnivores do consume invasive species, quantitative effects of new and abundant food sources on predators have rarely been documented and, as a consequence, potentially positiv...

The identification and risk assessment of potential biological invaders would provide valuable criteria for the allocation of resources toward the detection and control of invasion threats. Yet, freshwater biologists have made few attempts at predicting potential invaders, apparently because such efforts are perceived to be costly and futile. We describe some simple, low-cost empirical approach...

Round goby (Neogobius melanostomus, Pallas 1814) which belongs to Gobiidae, inhabits in the Black Sea, Marmara Caspian Sea and rivers that flows into fore stated seas. The main population parameters, such as age, length, sexual composition, length-weight relationship, growth, condition factor, gonadosomatic index reproduction of N. melanostomus were investigated from coasts southern this study....