caa a22 4500 44589363X CHVBK 20180317145624.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s10750-010-0509-z doi (NATIONALLICENCE)springer-10.1007/s10750-010-0509-z Individual growth and reproductive behavior in a newly established population of northern snakehead ( Channa argus ), Potomac River, USA [Elektronische Daten] [Andrew Gascho Landis, Nicolas Lapointe, Paul Angermeier] Northern snakehead (Channa argus) were first found in the Potomac River in 2004. In 2007, we documented feeding and reproductive behavior to better understand how this species is performing in this novel environment. From April to October, we used electrofishing surveys to collect data on growth, condition, and gonad weight of adult fish. Growth rates of young were measured on a daily basis for several weeks. Mean length-at-age for Potomac River northern snakehead was lower than for fish from China, Russia, and Uzbekistan. Fish condition was above average during spring and fall, but below average in summer. Below-average condition corresponded to periods of high spawning activity. Gonadosomatic index indicated that females began spawning at the end of April and continued through August. Peak spawning occurred at the beginning of June when average temperatures reached 26°C. Larval fish growth rate, after the transition to exogenous feeding, was 2.3 (SD±0.7) mm (total length, TL) per day. Although Potomac River northern snakehead exhibited lower overall growth rates when compared to other populations, these fish demonstrated plasticity in timing of reproduction and rapid larval growth rates. Such life history characteristics likely contribute to the success of northern snakehead in its new environment and limit managers' options for significant control of its invasion. Springer Science+Business Media B.V., 2010 Channa argus nationallicence Gonadosomatic index nationallicence Virginia nationallicence von Bertalanffy nationallicence Gascho Landis Andrew Department of Fisheries and Wildlife Sciences, Virginia Polytechnic Institute and State University, 100 Cheatham Hall, 24061-0321, Blacksburg, VA, USA aut Lapointe Nicolas Department of Fisheries and Wildlife Sciences, Virginia Polytechnic Institute and State University, 100 Cheatham Hall, 24061-0321, Blacksburg, VA, USA aut Angermeier Paul Department of Fisheries and Wildlife Sciences, Virginia Polytechnic Institute and State University, 100 Cheatham Hall, 24061-0321, Blacksburg, VA, USA aut Hydrobiologia Springer Netherlands 661/1(2011-02-01), 123-131 0018-8158 661:1<123 2011 661 10750 https://doi.org/10.1007/s10750-010-0509-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-010-0509-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gascho Landis Andrew Department of Fisheries and Wildlife Sciences, Virginia Polytechnic Institute and State University, 100 Cheatham Hall, 24061-0321, Blacksburg, VA, USA aut NATIONALLICENCE 700 1- Lapointe Nicolas Department of Fisheries and Wildlife Sciences, Virginia Polytechnic Institute and State University, 100 Cheatham Hall, 24061-0321, Blacksburg, VA, USA aut NATIONALLICENCE 700 1- Angermeier Paul Department of Fisheries and Wildlife Sciences, Virginia Polytechnic Institute and State University, 100 Cheatham Hall, 24061-0321, Blacksburg, VA, USA aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 661/1(2011-02-01), 123-131 0018-8158 661:1<123 2011 661 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer