If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email help@ingentaconnect.com

Acoustic ontogeny of a teleost

$48.00 plus tax (Refund Policy)

Download / Buy Article:

Abstract:

The influence of growth on the intensity and variability of acoustic echoes from individuals and groups of a teleosts was quantified using Donaldson trout (rainbow–steelhead hybrid) Oncorhynchus mykiss. Fish growth was linear in total length (LT) and quadratic in mass. Dorsal swimbladder area increased exponentially with LT. Allometric growth ratio (i.e. k) values of swimbladder length linearly increased with LT. Average swimbladder volumes occupied 3–6% of fish body volume and increased exponentially with LT. The aspect angle that resulted in the maximum average acoustic intensity from the group shifted from 80 to 86° through the experimental period. Mean echo intensities increased at both 38 and 120 kHz as mean LT increased. Predicted echo intensities at 38 kHz exceeded that at 120 kHz at LT <150 mm but were less than that predicted at 120 kHz at LT >280 mm. Generalized additive mixed models using LT, swimbladder angles and lateral elongation ratios of fish bodies were better predictors of echo intensities than LT alone.

Keywords: Donaldson trout; backscatter model; swimbladder; target strength

Document Type: Regular Paper

DOI: http://dx.doi.org/10.1111/j.1095-8649.2008.02024.x

Publication date: October 1, 2008

Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more