The Marine chapter of the 2016 State of the Environment (SoE) report incorporates multiple expert templates developed from
streams of marine data. This metadata record describes the Expert Assessment "The state and trends of quality of species
and groups – dolphins and porpoises". The full Expert Assessment, including figures and tables (where provided), is attached
to this record. Where available, the Data Stream(s) used to generate this Expert Assessment are accessible through the
"On-line Resources" section of this record.
DESCRIPTION OF TAXONOMIC GROUP FOR EXPERT ASSESSMENT
Following taxonomic standards, 20 dolphin species in the Family Delphinidae and one species in the Family Phocoenidae occur
in Australian waters. A number of these species (e.g. common bottlenose dolphins) are distributed nationally, others are
restricted to particular latitudes (e.g. dusky dolphin) and others consist of populations that are highly restricted to embayments
and tributaries within particular regions (e.g. the endemic snub-fin dolphin).
DATA STREAM(S) USED IN EXPERT ASSESSMENT
This assessment is based on peer-review papers and reports provided by a series of researchers working on dolphin and porpoises
in Australia. Data on state and trends and associated spatial and temporal coverage are detailed in the publications provided
in the reference list. Specific data products used to generate the assessment are not listed.
2016 SOE ASSESSMENT SUMMARY [see attached Expert Assessment for full details]
• 2016 •
Assessment grade: Good
Assessment trend: Unclear
Confidence grade: Limited evidence or limited consensus
Confidence trend: Limited evidence or limited consensus
Comparability: Grade and trend are somewhat comparable to the 2011 assessment
• 2011 •
Assessment trend: Stable
CHANGES SINCE 2011 SOE ASSESSMENT
The 2016 assessment is similar to the 2011 assessment. With very little information on most species abundances and no long-term
monitoring of populations with which clear trends could be determined it was considered appropriate to alter the trend assignment
to ‘unclear’ rather than ‘stable’.
Ansmann, I. C., et al. “Monitoring dolphins in an urban marine system: total and effective population size estimates of
Indo-Pacific bottlenose dolphins in Moreton Bay, Australia.” Plos One 8(6): e65239.
Bejder, L., et al. (2012). “Coastal dolphins in north-western Australia: the need for re-evaluation of species listings
and short-comings in the Environmental Impact Assessment process.” Pacific Conservation Biology 18: 22-25.
Brooks, L. and K. Pollock. (2015). The Darwin Dolphin Monitoring Program. Abundance, apparent survival, movements ans habitat
use of humpback, bottlenose and snubfin dolphins in the Darwin area.
Brown, A. M., et al. (2016). “Site-specific assessments of the abundance of three inshore dolphin species to inform conservation
and management.” Frontiers in Marine Science 3(4): 10.3389/fmars.2016.00004.
Cagnazzi, D., et al. (2013). “At the heart of the industrial boom: Australian snubfin dolphins in the Capricorn Coast, Queensland,
need urgent conservation action. Plos One 8(2): e56729.
De Biasi Cagnazzi, D., et al. (2011). “Abundance and site fidelity of Indo-Pacific humpback dolphins in the Great Sandy
Strait, Queensland, Australia.” Marine Mammal Science 27(2): 255-281.
Filby, N. E., et al. (2010). "Distribution and Population Demographics of Common Dolphins (Delphinus delphis) in the Gulf
St. Vincent, South Australia." Aquatic Mammals 36(1): 33-45.
Möller, L., et al. (2012). Population size, structure and habitat preferences of common dolphins in South Australia: enhancing
the assessment, reduction and mitigation of fisheries operational interactions. Final report to the Australian Marine Mammal
Centre. Flinders University, Adelaide.
Nicholson, K., et al. (2012). “Abundance, survival and temporary emigration of bottlenose dolphins (Tursiops sp.) off Useless
Loop in the western gulf of Shark Bay, Western Australia.” Marine and Freshwater Research 63: 1059-1068.
Palmer, C., et al. (2014). "Estimates of abundance and apparent survival of coastal dolphins in Port Essington harbour, Northern
Territory, Australia." Wildlife Research 41: 35-45.
Parra, G. J. and D. Cagnazzi (2016). “Conservatioon status of the Australian humpback dolphin (Sousa sahulensis) using the
IUCN Red List criteria.” Advances in Marine Biology 73: 157-192.
Parra, G. J., et al. (2006). “Population sizes, site fidelity and residence patterns of Australian snubfin and Indo-Pacific
humpback dolphins: implications for conservation.” Biological Conservation 129: 167-180.
Sprogis, K. R., et al. (2016). "Sex-specific patterns in abundance, temporary emigration and survival of Indo_pacific bottlenose
dolphins (Tursiops aduncus) in coastal and estuarine waters. ." Frontiers in Marine Science 3(12).
QUALITY OF DATA USED IN THE ASSESSMENT
Data used to determine state and trend are based on systematic surveys for the relevant species. Methods and associated
quality of data produced by those surveys are detailed in the publications provided in the reference list.
CUSTODIAN AND LOCATION OF DATA
Data has been used from individual peer-review papers and reports (details of the specific data products used in this assessment
have not been provided).
METHOD USED TO DETERMINE STATE OR RECENT TREND
Methods associated with the systematic surveys used to produce abundance estimates for the relevant species are detailed
in the publications provided in the reference list ("Supplementary information").
When citing this Expert Assessment in a list of references use the following format:
citation author name/s (year metadata published), metadata title. Citation author organisation/s. File identifier and Data
accessed at (add http link).