Data

Larval fish assemblages in Coastal, Shelf and Offshore Waters of South-Western Australia

Australian Ocean Data Network
Muhling, Barbara
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/36326070-251e-11dc-aba4-00188b4c0af8&rft.title=Larval fish assemblages in Coastal, Shelf and Offshore Waters of South-Western Australia&rft.identifier=https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/36326070-251e-11dc-aba4-00188b4c0af8&rft.description=Fish larvae were sampled along a five-station transect extending from inshore (18m depth) to offshore waters (1000m depth) of the coast of South-Western Australia (see thumbnail). 148 taxa from 93 teleost families were identified. The temporal and spatial structure of the fish assemblages were analysed in relation to the environmental variables. Assemblages were closely correlated to water masses (Capes and Leeuwin Current)Maintenance and Update Frequency: notPlannedStatement: Sampling for this study were carried out at five stations along an 84km transect, located offshore of the town of Two Rocks (-31.52, 115.60) in Western Australia [see thumbnail] The program involved sampling for a period of two and half years, August 2002 to December 2004. All stations were sampled on a quarterly basis, and, in addition, the three inshore stations were sampled monthly, where possible. (For further detailed collection methodology see thesis - Chapter 2)Statement: Vertical CTD (conductivity-temperature-depth) casts were completed using a Seabird Model SEB 19+ instrument at all stations where larval fish were sampled. Casts were to 300m depth, or to just above the bottom in shallower water. Temperature and salinity measurements through the water column at each station were used to characterise water masses. Chlorophyll a biomass data (mg/m3) were derived from correlations to fluorescence data (volts), which were taken from a fluorometer attached to the CTD. Sea-surface temperature satellite images were derived from the advanced, very high resolution radiometer (AVHRR). Plankton samples were taken with day-time oblique bongo net tows to 150m depth, or just above the bottom in shallower water. Nets were fitted with 100um and 300um mesh (mouth area 0.196m2, diameter 0.5m), and were towed at about 2 knots. The 355um net was fitted with a General Oceanics flowmeter. All tows were replicated, with the exception of stations A -C on the November 2002 cruise, station C on the March and June 2003, and November 2004 cruises, and station B on the October 2003 and October 2004 cruises. Plankton samples from the first replicate tow were split immediately after collection, with half the sample fixed in 10% buffered formaldehyde, and in 100% ethanol, to allow for later analyses on genetics and/or larval fish otoliths. Samples preserved in ethanol has the ethanol replaced after 24 hours to ensure proper preservation. Samples from the second replicate tow were preserved in formaldehyde only. (For further detailed lineage see thesis methodology)&rft.creator=Muhling, Barbara &rft.date=2007&rft.coverage=westlimit=114.5; southlimit=31.9; eastlimit=115.6; northlimit=31.5&rft.coverage=westlimit=114.5; southlimit=31.9; eastlimit=115.6; northlimit=31.5&rft.coverage=uplimit=1000; downlimit=18&rft.coverage=uplimit=1000; downlimit=18&rft_subject=oceans&rft_subject=COMMUNITY STRUCTURE&rft_subject=EARTH SCIENCE&rft_subject=BIOSPHERE&rft_subject=ECOLOGICAL DYNAMICS&rft_subject=COMMUNITY DYNAMICS&rft_subject=OCEAN CURRENTS&rft_subject=OCEANS&rft_subject=OCEAN CIRCULATION&rft_subject=EDDIES&rft_subject=WATER DEPTH&rft_subject=BATHYMETRY/SEAFLOOR TOPOGRAPHY&rft_subject=WATER TEMPERATURE&rft_subject=TERRESTRIAL HYDROSPHERE&rft_subject=WATER QUALITY/WATER CHEMISTRY&rft_subject=CONDUCTIVITY&rft_subject=FISH&rft_subject=BIOLOGICAL CLASSIFICATION&rft_subject=ANIMALS/VERTEBRATES&rft_subject=Gobiidae&rft_subject=Blenniidae&rft_subject=Clupeidae&rft_subject=Engraulidae&rft_subject=Carangidae&rft_subject=Labridae&rft_subject=Myctophidae&rft_subject=Phosichthydae&rft_subject=Gonostomatidae&rft.type=dataset&rft.language=English Access the data
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Brief description

Fish larvae were sampled along a five-station transect extending from inshore (18m depth) to offshore waters (1000m depth) of the coast of South-Western Australia (see thumbnail). 148 taxa from 93 teleost families were identified. The temporal and spatial structure of the fish assemblages were analysed in relation to the environmental variables. Assemblages were closely correlated to water masses (Capes and Leeuwin Current)

Lineage

Maintenance and Update Frequency: notPlanned
Statement: Sampling for this study were carried out at five stations along an 84km transect, located offshore of the town of Two Rocks (-31.52, 115.60) in Western Australia [see thumbnail] The program involved sampling for a period of two and half years, August 2002 to December 2004. All stations were sampled on a quarterly basis, and, in addition, the three inshore stations were sampled monthly, where possible. (For further detailed collection methodology see thesis - Chapter 2)
Statement: Vertical CTD (conductivity-temperature-depth) casts were completed using a Seabird Model SEB 19+ instrument at all stations where larval fish were sampled. Casts were to 300m depth, or to just above the bottom in shallower water. Temperature and salinity measurements through the water column at each station were used to characterise water masses. Chlorophyll a biomass data (mg/m3) were derived from correlations to fluorescence data (volts), which were taken from a fluorometer attached to the CTD. Sea-surface temperature satellite images were derived from the advanced, very high resolution radiometer (AVHRR). Plankton samples were taken with day-time oblique bongo net tows to 150m depth, or just above the bottom in shallower water. Nets were fitted with 100um and 300um mesh (mouth area 0.196m2, diameter 0.5m), and were towed at about 2 knots. The 355um net was fitted with a General Oceanics flowmeter. All tows were replicated, with the exception of stations A -C on the November 2002 cruise, station C on the March and June 2003, and November 2004 cruises, and station B on the October 2003 and October 2004 cruises. Plankton samples from the first replicate tow were split immediately after collection, with half the sample fixed in 10% buffered formaldehyde, and in 100% ethanol, to allow for later analyses on genetics and/or larval fish otoliths. Samples preserved in ethanol has the ethanol replaced after 24 hours to ensure proper preservation. Samples from the second replicate tow were preserved in formaldehyde only. (For further detailed lineage see thesis methodology)

Notes

Credit
Part of the Strategic Research Fund for the Marine Environment Project (SRFME)

Created: 28 06 2007

Data time period: 2002-02 to 2004-12

This dataset is part of a larger collection

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115.6,31.5 115.6,31.9 114.5,31.9 114.5,31.5 115.6,31.5

115.05,31.7

text: westlimit=114.5; southlimit=31.9; eastlimit=115.6; northlimit=31.5

text: uplimit=1000; downlimit=18

Subjects
ANIMALS/VERTEBRATES | BATHYMETRY/SEAFLOOR TOPOGRAPHY | BIOLOGICAL CLASSIFICATION | BIOSPHERE | Blenniidae | COMMUNITY DYNAMICS | Community Structure | Conductivity | Carangidae | Clupeidae | EARTH SCIENCE | ECOLOGICAL DYNAMICS | Eddies | Engraulidae | Fish | Gobiidae | Gonostomatidae | Labridae | Myctophidae | OCEAN CIRCULATION | Ocean Currents | OCEANS | Phosichthydae | TERRESTRIAL HYDROSPHERE | Water Depth | WATER QUALITY/WATER CHEMISTRY | Water Temperature | oceans |

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Other Information
(PhD Thesis)

uri : http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20061129.110448

Identifiers
  • global : 36326070-251e-11dc-aba4-00188b4c0af8
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