کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4396038 1618448 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Strontium (Sr) uptake from water and food in otoliths of juvenile pike (Esox lucius L.)
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم آبزیان
پیش نمایش صفحه اول مقاله
Strontium (Sr) uptake from water and food in otoliths of juvenile pike (Esox lucius L.)
چکیده انگلیسی

The strontium (Sr) or Sr:Ca ratio in otoliths has been widely used in the last decade to describe the migration histories of fish between fresh and marine waters. However, reference experimental studies of particular species and waters are necessary to confirm the underlying assumptions and evaluate the applicability of this tool to field data. Laboratory experiments indicated that juvenile, anadromous pike (Esox lucius L.) from the Baltic Sea reared in successively increasing salinities (from 0 to 7‰) for 110 d accumulated Sr in their otoliths according to a positive relationship with waterborne Sr. When the pike were given prey fish from brackish (7‰) environments, the otolith Sr:Ca ratio increased more than in fish given prey from freshwater lakes. Pike held at constant salinity (7‰) and given prey fish from the same salinity environment had an Sr:Ca ratio of 6.9 × 10− 3. The ratio decreased successively for fish given prey from freshwater (4.4 × 10− 3) or kept in freshwater and given food from brackish water (3.1 × 10− 3). Fish exposed to freshwater and given prey fish from freshwater displayed no increase in Sr:Ca ratio (1.6 × 10− 3). The experiments demonstrated that the Sr:Ca ratio may be used to describe the migration history of pike between rivers and the Baltic Sea. The maximum Sr:Ca value for pike given marine-origin food corresponded to those of fish collected from the Baltic Sea.


► With increasing salinity, Sr:Ca levels in pike otoliths increase.
► Pike given a diet from marine environment get higher Sr:Ca response in their otoliths.
► Maximum Sr:Ca values in experiment corresponded with maximum field values.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Experimental Marine Biology and Ecology - Volumes 418–419, 1 May 2012, Pages 69–74
نویسندگان
, , ,