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Does size matter? A test of size-specific mortality in Atlantic salmon Salmo salar smolts tagged with acoustic transmitters.

Newton, M. and Barry, J. and Dodd, J.A. and Lucas, M.C. and Boylan, P. and Adams, C.E. (2016) 'Does size matter? A test of size-specific mortality in Atlantic salmon Salmo salar smolts tagged with acoustic transmitters.', Journal of fish biology., 89 (3). pp. 1641-1650.

Abstract

Mortality rates of wild Atlantic salmon Salmo salar smolts implanted with acoustic transmitters were assessed to determine if mortality was size dependent. The routinely accepted, but widely debated, ‘2% transmitter mass: body mass’ rule in biotelemetry was tested by extending the transmitter burden up to 12·7% of body mass in small [mean fork length (LF) 138·3 mm, range 115–168 mm] downstream migrating S. salar smolts. Over the short timescale of emigration (range 11·9–44·5 days) through the lower river and estuary, mortality was not related to S. salar size, nor was a relationship found between mortality probability and transmitter mass: body mass or transmitter length: LF ratios. This study provides further evidence that smolt migration studies can deviate from the ‘2% rule’ of thumb, to more appropriate study-specific measures, which enables the use of fishes representative of the body size in natural populations without undue effects.

Item Type:Article
Full text:(AM) Accepted Manuscript
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Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1111/jfb.13066
Publisher statement:This is the accepted version of the following article: Newton, M., Barry, J., Dodd, J. A., Lucas, M. C., Boylan, P. and Adams, C. E. (2016), Does size matter? A test of size-specific mortality in Atlantic salmon Salmo salar smolts tagged with acoustic transmitters. Journal of Fish Biology, which has been published in final form at http://dx.doi.org/10.1111/jfb.13066. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
Date accepted:23 May 2016
Date deposited:23 August 2016
Date of first online publication:28 June 2016
Date first made open access:28 June 2017

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