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US AMLR data sets - Finfishes and Benthic Invertebrates. Periodic surveys of finfish and benthic invertebrates: 6 AMLR demersal surveys from 1998-2009. Data from two CCAMLR Subareas: 48.1 & 48.2. South Shetland Islands (Subarea 48.1) 1998, 2001, 2003 Antarctic Peninsula (Subarea 48.1) 2006 - PowerPoint PPT Presentation
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US AMLR data sets - Finfishes and Benthic Invertebrates
South Shetland Islands (Subarea 48.1) 1998, 2001, 2003 Antarctic Peninsula (Subarea 48.1) 2006South Orkney Islands (Subarea 48.2) 1999, 2009
Periodic surveys of finfish and benthic invertebrates:6 AMLR demersal surveys from 1998-2009
Data from two CCAMLR Subareas: 48.1 & 48.2
AMLR finfish survey databases reside here and at the CCAMLR Secretariat
63 62 61 60 59 58 57 56 55
Longitude
63.0
62.5
62.0
61.5
61.0
Latit
ude
50-100100-200200-300300-400400-500
D epth S trata (m )
South Shetland Islands Demersal/Benthic Surveys
61.0 60.5 60.0 59.5 59.0 58.5 58.0 57.5 57.0 56.5 56.0 55.5 55.0 54.5 54.0 53.5
Longitude (W )
63.8
63.6
63.4
63.2
63.0
62.8
62.6
62.4
62.2
62.0
61.8
Latit
ude
(S)
Trinity
Peninsula
Joinville Is.
D 'Urville Is.
South Shetla
nd Islands
100-200 n=16
200-300 n=18
300-400 n=14
400-500 n=11
D epth S trata (m )
500-800 n=3
50-100 n=3
Antarctic Peninsula Demersal/Benthic Survey
47.5 47.0 46.5 46.0 45.5 45.0 44.5 44.0 43.5 43.0 42.5
Longitude
62.2
62.0
61.8
61.6
61.4
61.2
61.0
60.8
60.6
60.4
Latit
ude
50-150 m
150-250 m
250-500 m600-800 m
Depth S trata (m )
South Orkney Islands Demersal/Benthic Surveys
Data Collection: Finfish
• Species identification: ~60 species of finfish
• Length, weight, sex & maturity
• Stomach content analysis (composition, filling degree, degree of digestion)
• Physiological measurements
• Environmental variables
• Material retained:- Whole specimens (835 specimens of 70 species)- Otoliths & hard parts (2583, of 21 species)- Tissue biopsies and DNA (>2000)- Gonads (265 of 12 species)
Data Collection: Invertebrate and Other
• Benthic invertebrate characterization- 61 operational taxonomic units (OTUs) at sea- 18 taxa provisionally recognized by CCAMLR to indicate
the presence of a Vulnerable Marine Ecosystem (VME) – number may increase
• High resolution video and photo transects
• Krill density (acoustic & net sampling)
• CTD
• Invertebrate specimens retained (over 2500 specimens of at least 500 species)
• Seabed classification
Uses of AMLR Demersal/Benthic Survey Data
Characterize Antarctic demersal finfish in the Southern Scotia Arc region:- abundance - biology- composition - ecology- spatial distribution- evolutionary phylogeny- physiology - taxonomy
Characterize epibenthic invertebrate megafauna:- abundance - composition
- spatial distribution- detection of vulnerable - new species marine ecosystems (VMEs)- bioregionalization - evolutionary phylogeny- taxonomy - reproduction
Only datasets available that capture properties of abundance and distribution of demersal finfish, their prey, and habitat characteristics
Only comprehensive dataset of composition and spatial distribution of benthic invertebrate megafauna in the Southern Scotia Arc
Most comprehensive datasets of dietary components of demersal finfish in the Southern Scotia Arc
Most comprehensive dataset for demersal fishes in the Southern Scotia Arc (Subarea 48.1 & 48.2), only scientific survey conducted along the Antarctic Peninsula
Uniqueness of AMLR Demersal/Benthic Data