Proceedings of the First International Snakehead Symposium

<em>Abstract.</em>—Northern Snakeheads <em>Channa argus </em>were imported by fish farmers in Arkansas for use and sale in live food markets before being banned by the state in July 2002. Farmers were advised to destroy their stock in 2002 when importation and interstate trade were federally banned under the Lacey Act (18 U.S.C § 42(a) (1)). These farmers reportedly attempted this action, but on April 14, 2008; a wild Northern Snakehead, confirmed by the Arkansas Game and Fish Commission, was captured by a local row crop farmer. An eradication plan was formulated for Fall 2008 involving several government agencies and universities. Arkansas experienced several late summer storms resulting in flood conditions during that time. The eradication effort, named Operation Mongoose, was rescheduled for March, 2009. Operation Mongoose involved the application of the fish toxicant rotenone using helicopters, Marsh Masters, boats, and ground teams to cover approximately 700 km of creeks, ditches, and backwater areas within the 20,250 ha Piney Creek watershed. The effort reduced the Northern Snakehead population in the drainage but did not eradicate them. Because this area is prone to annual flooding, range expansion of Northern Snakehead occurred. The Arkansas Game and Fish Commission tracks Northern Snakehead dispersal through reporting from the angling public. During 2017, the first confirmed range expansion outside of Arkansas occurred in Mississippi.

2010 ◽  
Author(s):  
Vicki Ahlstrom ◽  
John Lockett ◽  
Janis Connolly ◽  
Dane Russo ◽  
Barry Tillman

2006 ◽  
Vol 36 (17) ◽  
pp. 12
Author(s):  
MICHAEL E. PICHICHERO
Keyword(s):  

Author(s):  
Mark Meyer ◽  
Munsell McPhillips ◽  
Gary T. Moore
Keyword(s):  

2018 ◽  
pp. 20-27
Author(s):  
V. Zvolinsky ◽  
O. Zvolinskaya ◽  
N. Matveeva ◽  
A. Alexandrov
Keyword(s):  

2020 ◽  
Vol 643 ◽  
pp. 197-217 ◽  
Author(s):  
SME Fortune ◽  
SH Ferguson ◽  
AW Trites ◽  
B LeBlanc ◽  
V LeMay ◽  
...  

Climate change may affect the foraging success of bowhead whales Balaena mysticetus by altering the diversity and abundance of zooplankton species available as food. However, assessing climate-induced impacts first requires documenting feeding conditions under current environmental conditions. We collected seasonal movement and dive-behaviour data from 25 Eastern Canada-West Greenland bowheads instrumented with time-depth telemetry tags and used state-space models to examine whale movements and dive behaviours. Zooplankton samples were also collected in Cumberland Sound (CS) to determine species composition and biomass. We found that CS was used seasonally by 14 of the 25 tagged whales. Area-restricted movement was the dominant behaviour in CS, suggesting that the tagged whales allocated considerable time to feeding. Prey sampling data suggested that bowheads were exploiting energy-rich Arctic copepods such as Calanus glacialis and C. hyperboreus during summer. Dive behaviour changed seasonally in CS. Most notably, probable feeding dives were substantially shallower during spring and summer compared to fall and winter. These seasonal changes in dive depths likely reflect changes in the vertical distribution of calanoid copepods, which are known to suspend development and overwinter at depth during fall and winter when availability of their phytoplankton prey is presumed to be lower. Overall, CS appears to be an important year-round foraging habitat for bowheads, but is particularly important during the late summer and fall. Whether CS will remain a reliable feeding area for bowhead whales under climate change is not yet known.


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