%0 Journal Article %J Journal of Great Lakes Research %D 2012 %T Spatial, Seasonal, and Diel Distribution Patterns of Hemimysis anomala in New York State's Finger Lakes %A Brown, M. E. %A R. S. Morse %A O'Neill, K. %K Dispersal %K Finger Lakes %K Hemimysis anomala %K Invasive species %K Vertical migration %X

With this contribution, we report on the continued and rapid spread of Hemimysis anomala (Crustacea, Mysidae) to inland waters of New York State within the Laurentian Great Lakes watershed. In the spring and summer of 2010, we detected Hemimysis at multiple locations in Seneca Lake, spanning the lake's 61 km length, and in the Seneca-Cayuga Canal, 7 km downstream of the canal's source at Seneca Lake. We did not detect Hemimysis in any of the other ten Finger Lakes. The pattern of range expansion suggests jump dispersal to Seneca Lake, followed by passive dispersal in the Seneca-Cayuga Canal. This range expansion highlights the potential of this emerging invader to spread throughout the New York State Canal system that links the Great Lakes with the Hudson River watershed and a number of large inland lakes via the Erie Canal and its tributaries. During our nighttime sampling campaign on Seneca Lake, densities of Hemimysis exceeding 2500 ind./m3 were associated with littoral rocky structures, docks, and piers. At a reference site near the source of the Seneca-Cayuga Canal, we observed demographic shifts from an adult-dominated population in early spring to a juvenile-dominated population from late-spring to autumn. We also observed strong nocturnal behavior for all stages, with juveniles rising earlier than adults in the evening and remaining higher in the water column near dawn. These demographic and behavioral characteristics, combined with the extensive hydrogeographic network in the Great Lakes, contribute to the species rapid range expansion and the mechanism of its spread.

%B Journal of Great Lakes Research %V 38 %P 19-24 %G eng %U http://dx.doi.org/10.1016/j.jglr.2011.04.011 %R 10.1016/j.jglr.2011.04.011 %0 Journal Article %J Northeastern Naturalist %D 2011 %T An Historical Record of Alewife (Alosa pseudoharengus) in Lake Champlain %A Schmidt, R. E. %A R. S. Morse %K Alewife %K Alosa pseudoharengus %K Invasive species %K Lake Champlain %K New York %X

Recent establishment of invasive Alosa pseudoharengus (Alewife) in Lake Champlain and in the lake's watershed has been cause for concern. Based on three larval specimens newly discovered in the New York State Museum collections, we document Alewife in Lake Champlain in 1929. Therefore, there has been at least one early unsuccessful introduction of Alewife into Lake Champlain and there may have been others that escaped notice. Changing lake conditions may have allowed Alewife to recently become established.

%B Northeastern Naturalist %V 18 %P 229-235 %G eng %U http://dx.doi.org/10.1656/045.018.0209 %R 10.1656/045.018.0209 %0 Journal Article %J Aquatic Invasions %D 2009 %T Inferences on the Biology of Juvenile Chinese Mitten Crab (Eriocheir sinensis) from Exuviae in a Hudson River Tributary, New York, USA %A Schmidt, R. E. %A R. A. Daniels %A Swift, E. L. %A Shadis, I. B. %K Chinese mitten crab %K Hudson River %K Invasive species %K New York %X

Exuviae of Chinese mitten crab were collected in the Saw Kill, a small tributary to the fresh-tidal Hudson River, in summer and early fall 2008. Most exuviae were found in July when water temperatures exceeded 21ºC and numbers declined with subsequent decreasing water temperatures. Sizes ranged from 12 to 45 mm CW and all were considered to be in their second summer (1+). Very small exuviae (≤ 15 mm CW) were present from early June through mid-August indicating recruitment to the Saw Kill all summer. Live mitten crabs were difficult to collect and therefore data from exuviae were useful in observing the early stage of this invasion.

%B Aquatic Invasions %V 4 %P 613-617 %G eng %U http://dx.doi.org/10.3391/ai.2009.4.4.7 %R 10.3391/ai.2009.4.4.7