In-stream behaviour of threatened fishes and their food organisms based on remote video monitoring

Ebner, Brendan, Clear, Rhian, Godschalx, Simon, and Beitzel, Matthew (2009) In-stream behaviour of threatened fishes and their food organisms based on remote video monitoring. Aquatic Ecology, 43 (2). pp. 569-576.

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Abstract

Can remote underwater video be used to investigate the in-stream behaviour of small fishes and decapods? Diel activity of two threatened freshwater fishes (Macquaria australasica and Gadopsis bispinosus), a palaemonid prawn and an atyid shrimp, was established from remote underwater video in a pool of an upland stream in the current study. Decapods and large fishes (> 5 cm TL) were nocturnal, whereas, small fishes (< 5 cm TL) were diurnal. The suitability of using underwater video to quantify short-term (seconds) behavioural interaction among individuals was also demonstrated, with early-juvenile-phase Gadopsis bispinosus exhibiting interference competition on 35% of occasions when two or more individuals were observed. This study demonstrates that remote underwater video is useful for observing the in-stream behaviour of threatened freshwater fauna where other techniques are not viable, and presents sub-sampling of video as a means of reducing video processing time in assessing fish diel activity patterns.

Item ID: 35640
Item Type: Article (Research - C1)
ISSN: 1573-5125
Keywords: Gadopsidae macrobrachium, observer effect, Paratya, Percichthyidae
Funders: Environment ACT, Transgrid
Date Deposited: 01 Oct 2014 15:55
FoR Codes: 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060204 Freshwater Ecology @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 100%
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