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Density estimates of Spotted Handfish (Brachionichthys hirsutus) - GPS Underwater Visual Census. 2015-2016

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About this Collection

Density estimates of Spotted Handfish (Brachionichthys hirsutus) - GPS Underwater Visual Census. 2015-2016


Dive surveys were conducted in 2015 and 2016 to establish a baseline and monitor the status of the critically endangered spotted handfish (Brachionichthys hirsutus) population. This dataset contains track records of variable length, GPS tracked underwater visual census transects conducted within 11 sites across the Derwent Estuary (n=9) and D'Entre... more


Biogeography and Phylogeography


https://doi.org/10.4225/08/58db30b73f14c


Apr 2015


Nov 2016


Lincoln Wong
Lincoln.Wong@csiro.au

Brachionichthys hirsutus Endangered Species GPS (Global Positioning System) Tasmania Coast East and Southeast, TAS Underwater Surveys (acquisition and/or analysis) Visual Counts/Observations


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Web address for organisation CSIRO Oceans & Atmosphere - Hobart

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Web address for organisation CSIRO Oceans & Atmosphere - Hobart

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Point of truth URL of this metadata record

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Spotted handfish population data (2015-2016)

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Lynch T, Green M and Davies C. 2015. Short communication: Diver towed GPS to estimate densities of a critically endangered fish. Biological Conservation 191:700-706.

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Link to Lynch et al (2015) in CSIRO Publications


Population surveys of spotted handfish (Brachionichthys hirsutus) were conducted during the non-breeding season (March – August) of 2015 and 2016. 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.


CSIRO; UTAS; Department of the Environment (Funding); Department of Primary Industries, Parks, Water and Environment (Funding); NESP Marine Biodiversity Hub (Funding)


Creative Commons Attribution 4.0 International Licence


Australian Government Department of Environment (Australia), CSIRO (Australia), Department of Primary Industries, Parks, Water and Environment (Australia), National Environmental Science Programme (NESP) (Australia), The University of Tasmania (Australia)


Lynch, Tim; Green, Mark; Davies, Claire; Wong, Lincoln (2017): Density estimates of Spotted Handfish (Brachionichthys hirsutus) - GPS Underwater Visual Census. 2015-2016. v2. CSIRO. Data Collection. https://doi.org/10.4225/08/58db30b73f14c


All Rights (including copyright) CSIRO 2017.


The metadata and files (if any) are available to the public.

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Location Details

42°52′28.6496″ S


43°18′6.0486″ S


147°26′43.1583″ E


147°4′55.2″ E


WGS84


More about this Collection

b0c79329-a480-4762-a943-a902a74fc13e




Biota


Earth Science | Biosphere | Ecological Dynamics | Species/Population Interactions | Endangered Species





















FormatVersion
DIGITAL - Text Documents - CSV2016


OrganisationIndividual NamePositionRoleContact Information
data-requests-hf@csiro.au


eng


utf8


10/05/2016


29-3-2017 01:25:09


About this Project

NESP A10 Assessing the distribution and relative abundance of spotted handfish (Brachionichthys hirsutus) for performance assessment of conservation actions


Dive surveys were conducted in 2015 and 2016 to establish a baseline and monitor the status of the critically endangered spotted handfish (Brachionichthys hirsutus) population. This dataset contains track records of variable length, GPS tracked underwater visual census transects conducted within 11 sites across the Derwent Estuary (n=9) and D'Entre... more


Tim Lynch


Assessing the distribution and relative abundance of spotted handfish (Brachionichthys hirsutus).


Dive surveys were conducted in 2015 and 2016 to establish a baseline and monitor the status of the critically endangered spotted handfish (Brachionichthys hirsutus) population. This dataset contains track records of variable length, GPS tracked underwater visual census transects conducted within 11 sites across the Derwent Estuary (n equals 9) and ... more


Survey


Tim Lynch


Mark Green


Claire Davies


Lincoln Wong


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