Temporal and spatial variation in strontium in a tropical river: implications for otolith chemistry analyses of fish migration

被引：16
|
作者：
Crook, David A. [1 ]
Lacksen, Katherine [1 ]
King, Alison J. [1 ]
Buckle, Duncan J. [1 ]
Tickell, Steven J. [2 ]
Woodhead, Jonathon D. [3 ]
Maas, Roland [3 ]
Townsend, Simon A. [2 ]
Douglas, Michael M. [1 ,4 ]
机构：
[1] Charles Darwin Univ, Res Inst Environm & Livelihoods, Sch Environm, Darwin, NT, Australia
[2] Northern Terr Dept Land Resource Management, Div Water Resources, POB 496, Palmerston, NT 0831, Australia
[3] Univ Melbourne, Sch Earth Sci, Melbourne, Vic, Australia
[4] Univ Western Australia, Sch Earth & Environm, Crawley, WA, Australia
来源：
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES | 2017年 / 74卷 / 04期
关键词：
MC-ICP-MS; LIFE-HISTORY; SR ISOTOPES; WATER; MOVEMENTS; CONNECTIVITY; BARRAMUNDI; EXTRACTION; CARBONATES; ORIGIN;
D O I：
10.1139/cjfas-2016-0153
中图分类号：
S9 [水产、渔业];
学科分类号：
0908 ;
摘要：
Analysis of otolith strontium isotope ratios (Sr-87/Sr-86) is an increasingly utilized approach for studying fish migration. We analysed surface and ground water from the Daly River catchment in the wet- dry tropics of northern Australia over 2 years. Analyses of otolith Sr-87/Sr-86 ratios were also conducted for freshwater sooty grunter (Hephaestus fuliginosus) and the putatively diadromous diamond mullet (Liza ordensis). Spatial variation in freshwater Sr-87/Sr-86 was high (range: 0.71612-0.78059), and there was strong seasonality in water Sr-87/Sr-86, with highest values in the wet season. Temporal variation in water Sr-87/Sr-86 ratios is attributed to seasonal patterns in surface runoff from geological formations with radiogenic compositions versus input from groundwater aquifers interacting with less radiogenic formations. Temporal variation in water Sr-87/Sr-86 ratios precluded robust inference on movement within fresh water for both species, although movement across salinity gradients by diamond mullet was clearly identified. We conclude that temporally and spatially replicated water Sr data should be a general requisite for studies that analyse otolith Sr (Sr-87/Sr-86, Sr/Ca, Sr/Ba) to make inferences about fish movement and migration.
引用
收藏
页码：533 / 545
页数：13
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