Data

Spotted Handfish (Brachionichthys hirsutus) - GPS Underwater Visual Census - 2014-2022 repeated population surveys (NESP MB A10; MaC 1.23)

University of Tasmania, Australia

Lynch, Tim ; Stuart-Smith, Jemina ; Devine, Carlie ; McEnnulty, Felicity ; Wong, Lincoln

Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]

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The data describes the search effort (transect length, swathed area) and counts of handfish observed on each transect, including size measurements (total length) and depth records for each sighted fish.Maintenance and Update Frequency: annuallyStatement: Population surveys of spotted handfish (Brachionichthys hirsutus) were conducted during the non-breeding season (March – August) of 2014-2019. Surveys were conducted at 9 different location within the Derwent Estuary and 2 additional location in D'Entrecasteaux Channel. Data were collected using a variable length, GPS tracked underwater visual census method. Divers swam abreast approximately 0.5m-1m above the sediment to search for fish while towing a surface float with GPS housed onboard. The GPS tracked the position of the divers in real time and allowed extraction of spatial data post-hoc to determine searched distance to parameterise each transect. 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http://creativecommons.org/licenses/by/4.0/&rft_rights=http://i.creativecommons.org/l/by/4.0/88x31.png&rft_rights=WWW:LINK-1.0-http--related&rft_rights=License Graphic&rft_rights=Creative Commons Attribution 4.0 International License&rft_rights=http://creativecommons.org/international/&rft_rights=WWW:LINK-1.0-http--related&rft_rights=WWW:LINK-1.0-http--related&rft_rights=License Text&rft_rights=Cite data as: Lynch, T., Stuart-Smith, J., Devine, C., McEnnulty, F., & Wong, L. (2022). Spotted Handfish (Brachionichthys hirsutus) - GPS Underwater Visual Census - 2014-2022 repeated population surveys [Data set]. CSIRO & Institute for Marine and Antarctic Studies. https://doi.org/10.25959/6PYW-AK73&rft_rights=Creative Commons Attribution 4.0 International License http://creativecommons.org/licenses/by/4.0&rft_subject=biota&rft_subject=Brachionichthys hirsutus&rft_subject=Coastal Waters (Australia) | Tasmania Coast East and Southeast, TAS&rft_subject=GPS (Global Positioning System)&rft_subject=Visual Counts/Observations&rft_subject=Underwater Surveys (acquisition and/or analysis)&rft_subject=ENDANGERED SPECIES&rft_subject=FISH&rft_subject=diver&rft_subject=Abundance of biota&rft_subject=National Environmental Science Program (NESP) Marine and Coastal Hub&rft.type=dataset&rft.language=English Access the data

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This dataset is hosted by the Institute for Marine and Antarctic Studies (IMAS), University of Tasmania, on behalf of CSIRO through the National Environmental Science Program (NESP) Marine Biodiversity Hub and Marine and Coastal Hub.

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Cite data as: Lynch, T., Stuart-Smith, J., Devine, C., McEnnulty, F., & Wong, L. (2022). Spotted Handfish (Brachionichthys hirsutus) - GPS Underwater Visual Census - 2014-2022 repeated population surveys [Data set]. CSIRO & Institute for Marine and Antarctic Studies. https://doi.org/10.25959/6PYW-AK73

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Brief description

Dive surveys were conducted in 2014 and the same sites resurveyed annually until 2022 (excluding 2021), to establish a baseline and monitor the status of the critically endangered spotted handfish (Brachionichthys hirsutus) population. This dataset is a summary of all surveys season 2014 to 2022 (excluding 2021) in which the 11 sites across the Derwent Estuary and D'Entrecasteaux Channel were assessed. The data describes the search effort (transect length, swathed area) and counts of handfish observed on each transect, including size measurements (total length) and depth records for each sighted fish.

Lineage

Maintenance and Update Frequency: annually

Statement: Population surveys of spotted handfish (Brachionichthys hirsutus) were conducted during the non-breeding season (March – August) of 2014-2019. Surveys were conducted at 9 different location within the Derwent Estuary and 2 additional location in D'Entrecasteaux Channel. Data were collected using a variable length, GPS tracked underwater visual census method. Divers swam abreast approximately 0.5m-1m above the sediment to search for fish while towing a surface float with GPS housed onboard. The GPS tracked the position of the divers in real time and allowed extraction of spatial data post-hoc to determine searched distance to parameterise each transect. When B. hirsutus were located along the transect a series of photographs were taken to record the time of the sighting for cross-referencing with GPS spatial logs to determine the location of each sighting. The total length of each fish was measured to the nearest millimetre using a ruler placed laterally adjacent to the fish.

Notes

Credit
CSIRO

Credit
UTAS

Credit
Department of Climate Change, Energy, the Environment and Water (Funding)

Credit
Department of Primary Industries, Parks, Water and Environment (Funding)

Credit
National Environmental Science Program (NESP) Marine Biodiversity Hub (Funding)

Credit
National Environmental Science Program (NESP) Marine and Coastal Hub (Funding)

Data time period: 2014-02-28 to 2022-11-03

This dataset is part of a larger collection

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text: uplimit=20; downlimit=2

Subjects

User Contributed Tags

Other Information

(SUPPLEMENTARY DATA - Summary population statistics 1998 - 2019)

uri : https://data.imas.utas.edu.au/attachments/51702b57-d4e4-4477-b199-b3485675f66c/HFSummary1998_2019.csv External Link

Lynch, Tim; Green, Mark; Wong, Lincoln; Bessell, Tyson; Cooper, A. J.; Valentine, J; Barrett, Neville; Ross, Jeff; McEnnulty, Felicity; Foster, Scott. Assessment of conservations actions for the critically endangered spotted handfish (Brachionichthyidae), following curation of data collected by multiple investigators into a long-term time-series. Journal for Nature Conservation. 2022; 69(126237):1-12. doi:10.1016/j.jnc.2022.126237 (Associated Publication)

doi : https://doi.org/10.1016/j.jnc.2022.126237 DOI Link

Wong LSC, Lynch TP, Barrett NS, Wright JT, Green MA, Flynn DJH (2018) Local densities and habitat preference of the critically endangered spotted handfish (Brachionichthys hirsutus): Large scale field trial of GPS parameterised underwater visual census and diver attached camera. PLoS ONE 13(8): e0201518. doi:10.1371/journal.pone.0201518 (Associated Publication)

doi : https://doi.org/10.1371/journal.pone.0201518 DOI Link

Lynch, T., Green, M. & Davies, C. Diver-towed GPS to estimate densities of a critically endangered fish. Biological Conservation 191 (2015): 700-706. (Associated Publication)

doi : http://dx.doi.org/10.1016/j.biocon.2015.08.009 DOI Link

Lynch, Tim; Green, Mark; Davies, Claire. Diver towed GPS increases both statistical power to estimate densities and functionality to observe behaviours of sparsely distributed spotted handfish (Brachionichthys hirsutus, Lacépède 1804). Biological Conservation. 2015; 191(1 1):700-706. doi:102.100.100/91758 (Associated Publication)

doi : https://doi.org/102.100.100/91758 DOI Link

global : 27625ece-a38a-400e-9a1e-857d88d85655

Identifiers

DOI : 10.25959/6PYW-AK
global : 51702b57-d4e4-4477-b199-b3485675f66c

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