کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5744755 1412367 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparative diets of subyearling Atlantic salmon and subyearling coho salmon in Lake Ontario tributaries
ترجمه فارسی عنوان
رژیم های مقایسهای ماهیان آتلانتیک زیرزمینی و ماهی قزل آلا در فصل تابستان در جزایر دریاچه انتاریو
کلمات کلیدی
ماهی سالمون دریای آتلانتیک، ماهی قزل آلا، رژیم غذایی،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
چکیده انگلیسی
Restoration of Atlantic salmon (Salmo salar) in Lake Ontario could potentially be negatively affected by the presence of non-native salmonids that are naturalized in the basin. Coho salmon (Oncorhynchus kisutch) have been spawning successfully in Lake Ontario tributaries for over 40 years and their juveniles will reside in streams with juvenile Atlantic salmon for one year. This study sought to examine interspecific diet associations between these species, and to compare diets to the composition of the benthos and drift in three Lake Ontario tributaries. Aquatic insects, mainly ephemeropterans and chironomids were the major prey consumed by subyearling Atlantic salmon whereas terrestrial invertebrates made up only 3.7% of the diet. Ephemeropterans and chironomids were the primary aquatic taxa consumed by subyearling coho salmon but, as a group, terrestrial invertebrates (41.8%) were the major prey. In sympatry, Atlantic salmon fed more actively from the benthos whereas the diet of coho salmon was more similar to the drift. The different feeding pattern of each species resulted in low interspecific diet similarity. There is likely little competition between these species for food in Lake Ontario tributaries as juveniles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Great Lakes Research - Volume 42, Issue 4, August 2016, Pages 854-860
نویسندگان
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