| Autor: |
Marc A. Chalupnicki, James E. McKenna, Brent T. Boscarino, Kelly Bowen, James H. Johnson, Brian F. Lantry, Jocelyn Gerlofsma, Richard C. Back, A. Garry Smythe, Ted Schaner, Michael Goehle, Roberta Cap, Bryan Young, Maureen Walsh, Jennifer M. Questel |
| Rok vydání: |
2010 |
| Předmět: |
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| Zdroj: |
Journal of Great Lakes Research. 36:499-504 |
| ISSN: |
0380-1330 |
| DOI: |
10.1016/j.jglr.2010.04.012 |
| Popis: |
Hemimysis anomala, a Ponto-Caspian littoral mysid, is an emerging Great Lakes invader that was discovered in Lakes Michigan and Ontario in 2006. Similar to the native mysid Mysis diluviana, Hemimysis exhibits a diel vertical migration pattern but generally inhabits shallower and warmer waters than M. diluviana. Because basic information on the distribution, habitat use, and biology of Hemimysis in the Great Lakes is scarce, the potential for food web disruption by Hemimysis cannot easily be predicted. Preliminary observations indicate widespread invasion of Hemimysis in Lake Ontario. In this study, we confirm the presence of Hemimysis at sites spanning the northern and southern shores of Lake Ontario and the presence of the individuals during winter months. In one horizontal tow in November 2007, over 26,000 individuals were collected with a length range of 4.4 to 9.0 mm and an average caloric density of 611 cal/g wet weight. The most effective methods for sampling Hemimysis were horizontal tows ... |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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