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USGS research frontiers on fish at the American Fisheries Society Conference
Date:9/6/2011

odels demonstrating that the growth and maturation of young fish are most critical to the continuation of the explosive growth of this exceedingly noxious species. Currently, however, most management efforts are focused on adult silver carp because they are easier to locate and remove. First introduced to the United States in the 1980s, silver carp have quickly expanded their range with a combination of rapid growth, quick maturation and the ability to reproduce multiple times per year. These fish are also capable of eating large quantities of plankton and detritus, and are affecting native fishes in areas where they become established. The model, which looked at silver carp populations in large Midwestern rivers, indicates that resource managers may want to target the removal of younger fishes to better control the expansion of this prolific invasive species. This study, Age-specific demography of silver carp: implications for management and control, will be presented Sept. 7 at 9 a.m. in room 612. To learn more, contact Joseph Gerken at gerkenje@ksu.edu or at 785-477-4150.

Climate change likely to be both a boom and a bust for smallmouth bass populations: The smallmouth bass is a popular sport fish that has spread far and wide beyond its native range, but climate change may play a significant role in where it goes next. USGS and University of Missouri scientists modeled the effects of conservative climate change estimates on smallmouth bass population growth, assuming a 2-degree Celsius increase in temperature over the next 30 years. While smallmouth bass populations in more northern habitats were expected to increase growth, southern climates could expect a decline in growth, since this fish doesn't do as well when temperatures frequently exceed 27 degrees Celsius (80 F). This research shows that climate has direct implications for smallmouth bass survival and reproduction, and understanding how smallmouth bass popu
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Contact: Catherine Puckett
cpuckett@usgs.gov
352-278-0165
United States Geological Survey
Source:Eurekalert

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