کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8849131 1618516 2018 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Retention of morphological and ecological traits of Lake Superior cisco Coregonus artedi after translocation into inland lakes
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
پیش نمایش صفحه اول مقاله
Retention of morphological and ecological traits of Lake Superior cisco Coregonus artedi after translocation into inland lakes
چکیده انگلیسی
Introductions of Coregonus artedi from Lake Superior into several inland lakes in Minnesota in the 1920s and 1930s constituted a natural experiment of how phenotypic plasticity and adaptation can shape cisco diversity. Genetic data were consistent with a Lake Superior origin for the introduced populations, which resembled contemporary Lake Superior cisco in possessing large, elongated bodies and short fins, and in maturing at older ages. Native inland cisco had smaller, deeper bodies, longer fins, and matured at younger ages. Introduced populations also retained the Lake Superior characteristic of inhabiting the upper portion of the water column and showed a high degree of planktivory. However, introduced cisco exhibited small but measurable shifts in body shape and fin lengths toward native inland forms. These morphological shifts were possibly associated with greater benthivory after translocation. Assuming that native inland populations were well adapted to inland lakes and that selective pressures on native and introduced populations were similar, these results indicated that substantial further phenotypic, behavioral, and life history change is required before the introduced populations become similarly adapted to their new environments. The findings suggest that anthropogenic environmental alterations such as climate change and eutrophication might occur at a faster pace than adaptive evolutionary responses. In addition, translocated Great Lakes coregonines could possibly maintain traits exhibited in their source lake, and may not fully restore ecological functions of extirpated populations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Great Lakes Research - Volume 44, Issue 2, April 2018, Pages 289-298
نویسندگان
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