2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/24/2018 | 11:30 AM - 11:45 AM | EVOLUTIONARY ECOLOGY OF GREAT LAKES ALEWIVES (ALOSA PSEUDOHARENGUS): AN ANALYSIS OF PHENOTYPIC PATTERNS AND RATES OF CHANGES. | 410 A
EVOLUTIONARY ECOLOGY OF GREAT LAKES ALEWIVES (ALOSA PSEUDOHARENGUS): AN ANALYSIS OF PHENOTYPIC PATTERNS AND RATES OF CHANGES.
Invasive species cause enormous environmental and economic tolls on aquatic ecosystems, particularly in the Great Lakes. However, invasive species also pose exciting opportunities for studying rates and patterns of evolutionary change. Alewives, Alosa pseudoharengus, are anadromous fishes native to the east coast of North America. Multiple native east coast populations have become landlocked in inland lakes within the past several thousand years. More recently, alewives have been introduced in the Great Lakes via shipping canals or stocking. In this study, we compared phenotypic traits of Great Lakes alewives to native anadromous and landlocked populations to determine the rate and patterns of phenotypic evolution. Our results show parallel evolution of phenotypic traits associated with swimming and trophic niche between Great Lakes and landlocked East Coast populations, including gill raker spacing, gape width, body shape and body size. We suggest that the cessation of migration can result in rapid local adaptation, and that Great Lakes landlocked alewife populations are an excellent opportunity to study rates of adaptation to a novel environment.
- Evo-eco Dynamics
- Anthropogenic
- Invasive
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Presenters/Authors
Shelby Smith
(), Western Michigan University, EckSmithSe@gmail.com;
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Eric Palkovacs
(), University of California - Santa Cruz, epalkova@ucsc.edu;
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Devin Bloom
(), Western Michigan University, devin.bloom@wmich.edu;
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