Effects of starvation on d15N and d13C in Atlantic bonito, Sarda sarda (Bloch, 1793)
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stable isotope analysis
The Atlantic bonito, Sarda sarda (Bloch, 1793), is a scombrid that occurs throughout the Atlantic Ocean and Mediterranean Sea. In spite of the commercial importance of this species, very few studies have been conducted recently to improve the knowledge and understanding of its trophic biology. Immature Atlantic bonito from a single batch (body mass mean SD = 445 107 g, fork length mean SD = 30.40 2.19 cm, n = 17) were provided by the ‘Planta Experimental de Cultivos Marinos’ (Instituto Espa~nol de Oceanograf ıa, C. O. de Murcia, Mazarr on, Spain). Throughout the experimental period (November 11, 2011– December 26, 2011), the fish were maintained under fasting conditions and natural photoperiod, temperature (17–20°C) and salinity (37 ppt). Samples of liver and muscle were collected from three individuals at the start of the experiment (day 0) and subsequently on days 7, 14, 25 and 45. Body mass and length were recorded during samplings, and the Fulton’s condition ...
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