8 research outputs found

    Underwood_hystrix@NWA_DRYAD-DATA_mtDNA-haplotypes

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    includes GenBank Accession Numbers for new mtDNA sequences for S. hystrix individuals from northwest Australi

    Underwood_hystrix@NWA_DRYAD-DATA_site-coords

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    includes latitude and longitude in decimal degrees of each site, region, system and Reef of S. hystrix collection

    Underwood_hystrix@NWA_DRYAD-DATA_coral-cover

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    includes data on % percentage coral cover of Seriatopora corals at each site at Scott Ree

    Underwood_hystrix@NWA_DRYAD-DATA_genotypes

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    includes microsatellite genotypes of all genets of S. hystrix from northwest Australia in GenAlex forma

    Hystrix@NWA_DRYAD-DATA

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    metadata README file describing each data file for DRYAD submission to accompany Underwood et al (Submitted to Molecular Ecology 2018) Genetic signatures through space, time and multiple disturbances in a ubiquitous brooding cora

    Additional file 1: Supplementary materials. of Contrasting responses to a climate regime change by sympatric, ice-dependent predators

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    Table S1. Primer sequences. Table S2. Summary statistics of Weddell seal and emperor penguin colonies by genetic region. Table S3. Bayesian skyline plot for emperor penguins based on cytochrome b alone. (DOCX 246 kb

    DataSheet_1_Video surveys of sea snakes in the mesophotic zone shed light on trends in populations.docx

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    Declines in abundance of sea snakes have been observed on reefs throughout the Indo-Pacific, although the reasons are unknown. To date, surveys have occurred on shallow reefs, despite sea snakes occurring over a large depth range. It is not known if populations of sea snakes in deep habitats have undergone similar declines. To address this, we analysed deep-water video data from a historical hotspot of sea snake diversity, Ashmore Reef, in 2004, 2016, and 2021. We collected 288 hours of video using baited remote underwater videos and a remotely operated vehicle at depths between 13 and 112 m. We observed 80 individuals of seven species with Aipysurus laevis (n = 30), Hydrophis peronii (n = 8), and H. ocellatus (n = 6) being the most abundant. Five of the species (A. duboisii, A. apraefrontalis, H. ocellatus, H. kingii, and Emydocephalus orarius) had not been reported in shallow waters for a decade prior to our study. We found no evidence of a decline in sea snakes across years in deep-water surveys, although abundances were lower than those in early shallow-water surveys. A comparison of BRUVS data from 2004 and 2016 was consistent with the hypothesis that predation by sharks may have contributed to the loss of sea snakes in shallow habitats. Our study highlights the use of underwater video to collect information on sea snakes in the mesophotic zone and also suggests that future monitoring should include these depths in order to capture a more complete representation of habitats occupied.</p
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