Fredrick
Well-known member
Published research by John Odenkirk . download the PDF file for the full article .
Trends in abundance of Northern Snakeheads
Abstract
A population of nonnative Northern Snakeheads Channa
argus was documented in the Potomac River system during
2004. We estimated relative abundance (fish/h of boat electrofishing)
for up to 12 years in four Virginia creeks within and downstream
of the original area of colonization. Population estimates
were also calculated for adult Northern Snakeheads in Little
Hunting Creek (one of the four study creeks). Relative abundance
increased dramatically after colonization, but trends suggest
that increases in abundance may have slowed. Population
estimates for Little Hunting Creek (12–22 fish/ha) declined each
year from 2013 to 2015, supporting the assertion that Northern
Snakehead density increases have slowed or that density has
stabilized in some creeks.
Trends in abundance of Northern Snakeheads
Abstract
A population of nonnative Northern Snakeheads Channa
argus was documented in the Potomac River system during
2004. We estimated relative abundance (fish/h of boat electrofishing)
for up to 12 years in four Virginia creeks within and downstream
of the original area of colonization. Population estimates
were also calculated for adult Northern Snakeheads in Little
Hunting Creek (one of the four study creeks). Relative abundance
increased dramatically after colonization, but trends suggest
that increases in abundance may have slowed. Population
estimates for Little Hunting Creek (12–22 fish/ha) declined each
year from 2013 to 2015, supporting the assertion that Northern
Snakehead density increases have slowed or that density has
stabilized in some creeks.
