Results 141 to 150 of about 2,488,897 (180)
Grounding water: Integrated methods for nature-based solutions in Great Lakes urban coastal regions. [PDF]
Camb Prism Coast FuturAlam E +3 more
europepmc +1 more source
Gharial acoustic signaling: Novel underwater pops are temporally based, context-dependent, seasonally stable, male-specific, and individually distinctive. [PDF]
J AnatAjji M J, Lang JW.
europepmc +1 more source
Temporal trend data (2005-2020) in density and biomass of 13 herbivorous fishes in the Gulf of California. [PDF]
Data BriefRodríguez-Villalobos JC +9 more
europepmc +1 more source
Detection heterogeneity in underwater visual-census data
Journal of Fish Biology, 2008 This study shows how capture–mark–recapture (CMR) models can provide robust estimates of detection heterogeneity (sources of bias) in underwater visual‐census data. Detection biases among observers and fish family groups were consistent between fished and unfished reef sites in Kenya, even when the overall level of detection declined between locations.
Timothy R. McClanahan +2 more
exaly +5 more sources
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Journal of Environmental Management, 2021
The much-publicized threats to coral reef systems necessitate a considered management response based on comprehensive ecological data. However, data from large reef systems commonly originate from multiple monitoring programs that use different methods, each with distinct biases that limit united assessments of ecological status.
Mike Emslie +2 more
exaly +4 more sources
The much-publicized threats to coral reef systems necessitate a considered management response based on comprehensive ecological data. However, data from large reef systems commonly originate from multiple monitoring programs that use different methods, each with distinct biases that limit united assessments of ecological status.
Mike Emslie +2 more
exaly +4 more sources
Biased underwater visual census biomass estimates for target-species in tropical reef fisheries
Journal of Fish Biology, 1995Visual census biomass estimates are compared with yields of three emperor (Lethrinidae) genera from shallow water fished reef habitats and we demonstrate that visual census can consistently underestimate the exploitable biomass of Lethrinus spp.
Nicholas V C Polunin, Simon Jennings
exaly +3 more sources
Journal of Experimental Marine Biology and Ecology, 2012
Abstract Fish communities associated with a series of artificial reefs deployed in three estuaries in southeastern Australia (151° 34′ E, 33° 7′ S to 150° 37′ E, 35° 8′ S) were surveyed using both Baited Remote Underwater Video (BRUV) and Underwater Visual Census (UVC).
Iain Suthers, Michael Lowry, Heath Folpp
exaly +2 more sources
Abstract Fish communities associated with a series of artificial reefs deployed in three estuaries in southeastern Australia (151° 34′ E, 33° 7′ S to 150° 37′ E, 35° 8′ S) were surveyed using both Baited Remote Underwater Video (BRUV) and Underwater Visual Census (UVC).
Iain Suthers, Michael Lowry, Heath Folpp
exaly +2 more sources
Performance of transect and point count underwater visual census methods [PDF]
Ecological Modelling, 1997 A simulation approach was used to study bias and variability of density estimates of fish using the transect and point count underwater visual census methods. Three experiments were conducted to examine the effects of fish density, sampling effort, and the speed of fish in relation to the observer. Fish density and sampling effort did not significantly
R.A Watson, T.J Quinn II
exaly +2 more sources
A novel underwater visual census: Seahorse population survey as a case study
Regional Studies in Marine Science, 2016Abstract Two different Underwater Visual Census (UVC1 and UVC2) were performed at three sites in the Ria Formosa, using 30 meter transect belts, and compared for differences in seahorse density and holdfast availability. Each UVC differed in transect placement and total survey area coverage.
José P Andrade +2 more
exaly +2 more sources