Dive surveys were conducted in 2014 and the same sites resurveyed annually until 2019, 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 2019 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.
Note that the specific latitude and longitude of individual fish have been redacted due to the vulnerable status of the species.
Contact the point of contact listed in this record for more 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
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