Dietary analysis of the herbivorous hemiramphid Hyporhamphus regularis ardelio: an isotopic approach

Carseldine, L. and Tibbetts, I. R. (2005) Dietary analysis of the herbivorous hemiramphid Hyporhamphus regularis ardelio: an isotopic approach. Journal of Fish Biology, 66 6: 1589-1600. doi:10.1111/j.0022-1112.2005.00701.x


Author Carseldine, L.
Tibbetts, I. R.
Title Dietary analysis of the herbivorous hemiramphid Hyporhamphus regularis ardelio: an isotopic approach
Journal name Journal of Fish Biology   Check publisher's open access policy
ISSN 0022-1112
Publication date 2005-01-01
Sub-type Article (original research)
DOI 10.1111/j.0022-1112.2005.00701.x
Volume 66
Issue 6
Start page 1589
End page 1600
Total pages 12
Editor J.F. Craig
Place of publication Oxford, UK
Publisher Blackwell
Language eng
Subject C1
270602 Animal Physiology - Cell
770403 Living resources (flora and fauna)
Abstract The stable isotope values for a range of size classes of Hyporhamphus regularis ardelio from Moreton Bay, south-east Australia were determined. There was a positive linear relationship between 613 C and standard length (L-s) (delta(13)C = 0.034 Ls - 16-23; r(2) = 0.78). delta(13)C ranged from -8.48 to - 17.29 parts per thousand with the smallest size class (50 mm Ls) being on average 1.04 parts per thousand enriched with respect to that of zooplankton (Temora turbinata) and 7.97 parts per thousand depleted compared to Zostera capricorni. delta(13)C was positively correlated with Ls (P<0.01) (more enriched with increasing Ls) with those fish of the largest size class (225mm L-S) being 9.86 and 0-84 parts per thousand enriched than T turbinata and Z. capricorni, respectively. There was no detectable trend in delta(15) N values with Ls (P > 0.0 1) with delta(15) N, ranging from 9.18 to 11.00 parts per thousand. Fish of all size classes were on average 2.32 and 7.63 parts per thousand more enriched than zooplankton and seagrass, respectively. Carbon isotope data indicate that H. r. ardelio commence life as carnivores and change to a diet in which seagrass is the primary carbon source. The dependence on animal matter, however, is always present. Due to the low percentage of nitrogen in Z. capricorni (2.5%) compared to zooplankton (9.1%) it appears that nitrogen from zooplankton is necessary throughout their life history with the carbon requirements for these fish coming chiefly from Z. capricorni. (c) 2005 The Fisheries Society of the British Isles.
Keyword Fisheries
Marine & Freshwater Biology
Carbon
Hemiramphidae
Isotopic Routing
Nitrogen
Stable Isotopes
Stable Carbon-isotope
Arrhamphus-sclerolepis-krefftii
Food-web Analysis
Trophic Position
Seagrass Communities
Nitrogen Isotopes
Sewage Effluent
Organic-carbon
Delta-c-13
Marine
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 17:39:54 EST