IMAS Metadata Catalogue
Spotted Handfish (Brachionichthys hirsutus) - GPS Underwater Visual Census - 2014-2022 repeated population surveys (NESP MB A10; MaC 1.23)
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.
Simple
Identification info
- Date (Revision)
- 2019-03-12
Principal investigator
- 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)
- Status
- On going
Point of contact
- Topic category
-
- Biota
Extent
Temporal extent
- Time period
- 2014-02-28 2017-07-05
Vertical element
- Minimum value
- 2
- Maximum value
- 20
- Identifier
- EPSG::5715
- Name
- MSL depth
- Maintenance and update frequency
- Annually
- WoRMS - World Register of Marine Species
- AODN Geographic Extent Names
- CSIRO Equipment
- NASA/GCMD Keywords, Version 8.5
- Keywords (Theme)
-
- Body length of Spotted Handfish
- Depth of sighted Spotted Handfish
- Stress response of fish
- Start time of dive transect (local)
- End time of dive transect (local)
- Area of seafloor searched
Resource constraints
- Other constraints
- 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.
Resource constraints
- Classification
- Unclassified
Resource constraints
- Linkage
-
http://i.creativecommons.org/l/by/4.0/88x31.png
License Graphic
- Title
- Creative Commons Attribution 4.0 International License
- Website
-
http://creativecommons.org/licenses/by/4.0/
License Text
- Other constraints
- The citation in a list of references is: citation author name/s (year metadata published), metadata title. Citation author organisation/s. File identifier and Data accessed at (add http link).
- Other constraints
- The data described in this record are the intellectual property of CSIRO.
- Language
- English
- Character encoding
- UTF8
- Supplemental Information
- 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. Lynch T,, Green M, Davies C. 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. 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. https://doi.org/10.1371/journal.pone.0201518
Content Information
- Content type
- Physical measurement
- Description
- Count of Spotted Handfish along transect
Identifier
- Code
- Abundance of biota
- Name
- Body length of Spotted Handfish
- Name
- Fish_length_mm
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/UXMM
- Name
- Millimetres
- Name
- Depth of sighted Spotted Handfish
- Name
- Sighted_depth_m
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/ULAA
- Name
- Metres
- Description
- 0 – No visible stress 1 – Threat display visible (dorsal, caudal fins erected) 2 – Movement visible, predominantly short distance 'walk' 3 – Escape response, short burst swim
- Name
- Stress response of fish
- Name
- Fish_Stress_Response
- Name
- Start time of dive transect (local)
- Name
- Time_Start
- Name
- End time of dive transect (local)
- Name
- Time_End
- Name
- Area of seafloor searched
- Name
- Swath_Area_m2
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/UMSQ
- Name
- Square metres
Distribution Information
- OnLine resource
- SUPPLEMENTARY DATA - Summary population statistics 1998 - 2019
- OnLine resource
-
NESP:CSIRO_NESP_handfish_surveys
MAP - Spotted Handfish surveys
- OnLine resource
-
CSIRO_NESP_handfish_surveys
This OGC WFS service returns the data for download in subsettable CSV format.
Resource lineage
- 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.
- Hierarchy level
- Dataset
Reference System Information
- Reference system identifier
- EPSG/WGS 84 (EPSG:4326)
- Hierarchy level
- Dataset
Platform
Identifier
- Code
- diver
mdb:MD_Metadata
- Metadata identifier
- urn:uuid/51702b57-d4e4-4477-b199-b3485675f66c
- Language
- English
- Character encoding
- UTF8
Point of contact
Processor
CSIRO/Oceans and Atmosphere - Data Officer (AR), Hobart
- Parent metadata
Type of resource
- Resource scope
- Dataset
- Metadata linkage
-
https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/51702b57-d4e4-4477-b199-b3485675f66c
Point of truth URL of this metadata record
- Date info (Creation)
- 2020-09-10T08:09:11
- Date info (Revision)
- 2023-06-04T21:29:34
Metadata standard
- Title
- ISO 19115-3:2018
