F. ROYER AND J.-M. FROMENTIN (2007): Environmental noise in spawning areas:
the case of Atlantic Bluefin Tuna (Thunnus thynnus). Fisheries Oceanography,
16 (2), 202-206.
doi:10.1111/j.1365-2419.2006.00424.x
Abstract: This paper provides an exploratory analysis aiming to seek whether
the colour of environmental noise theory could help in understanding the
intriguing reproductive strategy of Atlantic bluefin tuna (BFT). A
frequency-based approach based on spectral exponents, fβ with β < 0, is
chosen and applied on 10 biogeographical provinces covering the North
Atlantic. The major BFT spawning area, i.e. the Mediterranean Sea, was the
only one to display a pink power spectrum, whereas open ocean regions
displayed more reddened fluctuations, i.e. greater variance at low
frequencies. Environmental noise in the Mediterranean could, thus, offer
more favourable characteristics on the long-term than the open ocean. The
implications of these findings are discussed in regards to medium and long
(possibly evolutionary) time scales.
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University of Vienna, Dept. of Behavioural Biology
Sonja Amoser
Doctoral Student, Research Associate
Althanstrasse 14
1090 Vienna
Austria
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fax: +43 (1) 4277 54506
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