کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6359533 | 1622750 | 2013 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Does boat traffic cause displacement of fish in estuaries?
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
اقیانوس شناسی
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چکیده انگلیسی
Estuaries are increasingly under threat from a variety of human impacts. Recreational and commercial boat traffic in urban areas may represent a significant disturbance to fish populations and have particularly adverse effects in spatially restricted systems such as estuaries. We examined the effects of passing boats on the abundance of different sized fish within the main navigation channel of an estuary using high resolution sonar (DIDSON). Both the smallest (100-300Â mm) and largest (>501Â mm) size classes had no change in their abundance following the passage of boats. However, a decrease in abundance of mid-sized fish (301-500Â mm) occurred following the passage of boats. This displacement may be attributed to a number of factors including noise, bubbles and the rapidly approaching object of the boat itself. In highly urbanised estuarine systems, regular displacement by boat traffic has the potential to have major negative population level effects on fish assemblages.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Marine Pollution Bulletin - Volume 75, Issues 1â2, 15 October 2013, Pages 168-173
Journal: Marine Pollution Bulletin - Volume 75, Issues 1â2, 15 October 2013, Pages 168-173
نویسندگان
Alistair Becker, Alan K. Whitfield, Paul D. Cowley, Johanna Järnegren, Tor F. Næsje,