| General Information: |
| Title: | Salp Counts, Tasman Sea off South Eastern NSW (Australia), 2008 |
| Identifier: | klr.25 |
| Abstract: |
Swarms of the salp, Thalia democratica, periodically occur off southeast Australia following the austral spring bloom of phytoplankton. This study aimed to determine the abundance and size/stage distribution of T. democratica and their relationship with copepods in three water types of the western Tasman Sea. Samples were taken from vertical net hauls along four cross-shelf transects spaced along 200 km of the New South Wales coast, from the East Australian Current (EAC) separation zone, around 32.5ºS to off Sydney (34ºS). Temperature-salinity signatures grouped stations into three distinct water types: inner shelf water, EAC, and upwelled water. Although common across all stations, T. democratica was significantly more abundant within inner shelf waters compared to both EAC and upwelled water. Analysis of population structure (aggregate buds, aggregate females, aggregate males, immature solitaries and mature solitaries) also identified higher proportions of reproductive aggregates and their offspring in inner shelf water. This salp population structure was significantly different in the EAC regions, characterised by a paucity of the solitary stages, higher temperatures and lower chlorophyll a concentrations. A weak negative correlation was identified between T. democratica and copepod abundance. In this study, the maximum abundance of T. democratica was twice the highest global recorded abundance and tenfold greater than maximum abundances sampled from the continental shelf and slope waters off southeast Australia during 1938-42.
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| Keywords: |
- Jellyfish, Tasman Sea, Australia, plankton net, Salp, Thalia democtratica
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Involved Parties
| Data Set Creators: |
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Individual: | Natasha Henschke |
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Organization: | School of Biological, Earth, and Environmental Sciences, University of New South Wales |
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Position: | PhD Student |
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Address: |
| Sydney, New South Wales 2052 Australia |
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Email Address:
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Individual: | Dr. Iain Suthers |
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Organization: | University of New South Wales |
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Position: | Professor |
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Individual: | Dr. Mark E. Baird |
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Organization: | Climate Change Cluster |
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Position: | Senior Research Fellow |
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Address: |
| University of Technology, |
| PO Box 123, |
| Broadway, New South Wales 2007 Australia |
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Individual: | Dr. Jason Everett |
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Organization: | School of Biological Earth and Environmental Science, University of New South Wales |
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Position: | Postdoctoral Researcher |
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Address: |
| Sydney, New South Wales 2052 Australia |
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| Data Set Contacts: |
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Individual: | Dr. Iain Suthers |
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Organization: | University of New South Wales |
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Position: | Professor |
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| Associated Parties: |
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Individual: | Kelly Robinson |
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Organization: | Dauphin Island Sea Lab |
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Position: | PhD Candidate |
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Address: |
| 101 Bienville Blvd., |
| Dauphin Island, Alabama 36528 USA |
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| 251-861-2141 x2289 (voice) |
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Email Address:
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Individual: | Dr. William 'Monty' Graham |
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Organization: | Dauphin Island Sea Lab |
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Position: | Senior Marine Scientist |
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Address: |
| 101 Bienville Blvd., |
| Dauphin Island, Alabama 36528 USA |
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Phone:
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| 251-861-2141 ext. 2272 (voice) |
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Email Address:
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Individual: | Dr. Carlos Duarte |
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Organization: | Instituto Mediterráneo de Estudios Avanzados |
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Position: | Profesor de investigación |
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| C/ Miquel Marquès, 21, |
| 07190 Esporles, |
| Islas Baleares, Spain |
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Individual: | Dr. Robert Condon |
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Organization: | Dauphin Island Sea Lab |
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Position: | Research Faculty |
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Address: |
| 101 Bienville Blvd., |
| Dauphin Island, Alabama 36528 USA |
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| 251-861-2141 x7546 (voice) |
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Data Set Characteristics
| Geographic Region: |
| Geographic Description: | Tasman Sea |
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Bounding Coordinates:
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| West: | 156.75 degrees
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| East: | 172.75 degrees
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| North: | -31.375 degrees
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| South: | -45.0 degrees
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| Taxonomic Range: |
| Classification: |
| Rank Name: | Phylum |
| Rank Value: | Chordata |
| Classification: |
| Rank Name: | Class |
| Rank Value: | Thaliacea |
| Classification: |
| Rank Name: | Order |
| Rank Value: | Salpida |
| Classification: |
| Rank Name: | Family |
| Rank Value: | Salpidae |
| Classification: |
| Rank Name: | Genus |
| Rank Value: | Thalia |
| Classification: |
| Rank Name: | Species |
| Rank Value: | democratica |
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Sampling, Processing and Quality Control Methods
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Step by Step Procedures
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| Step 1: |
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Description:
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Plankton Net
Plankton net: vertical hauls using a N70 net with opening of 0.7m (redesigned based on Kemp and Hardy, 1929). Net was dropped to 50m and towed to the surface at 1 ms-1. Two net hauls were made at each station (total of 39 stations). Fixed immediately in 5 % formaldehyde in seawater. Two 1 ml subsamples were taken for counts with a minimum of 100 zooplankton individuals counted. Extra subsamples were taken if necessary. N=2 for each net haul, N=4 for each CTD station
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Data Set Usage Rights
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Usage restricted to Global Jellies Working Group members.
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