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- W3044669240 endingPage "106629" @default.
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- W3044669240 abstract "Abstract The alarming decline of spawning aggregations across the world highlights the need to improve their long-term monitoring and protection. Here, we examined the ability of diver operated stereo-video to characterize reef fish spawning aggregations, using an opportunistic encounter with the first spawning aggregation of the Mexican hogfish, Bodianus diplotaenia, recorded in the Galapagos Marine Reserve. We aimed to provide estimates of total density, length and reproductive behaviour, using quantitative surveys and 3D representation of the spawning event. 3D scenes of aggregating fish in relation to reef substrate were produced to compute distances between individuals (of the same and different sex), and between individuals and the substrate. Males swam significantly higher in the water column and further away from each other when compared to females, which displayed sociable behaviour closer to the bottom. The mean fork length of males (39.79 ± 6.98 cm) was nearly twice the size of females (24.14 ± 5.39 cm). We show that diver operated stereo-video can provide accurate baseline measures of fish length, density and reproductive behaviours. Our study offers a new method to characterize fish mating systems, and contributes to expanding the range of easily repeatable low-impact tools for the long-term monitoring of spawning events." @default.
- W3044669240 created "2020-07-29" @default.
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- W3044669240 date "2020-09-01" @default.
- W3044669240 modified "2023-10-14" @default.
- W3044669240 title "A diver operated stereo-video approach for characterizing reef fish spawning aggregations: The Galapagos Marine Reserve as case study" @default.
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- W3044669240 doi "https://doi.org/10.1016/j.ecss.2020.106629" @default.
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