[Location: Location_Category='GEOGRAPHIC REGION', Location_Type='POLAR']
Climate change and urchin fertilisation and the effect on the growth rate of juvenile Abatus sp.Entry ID: AAS_3134_urchins_climate_change
Abstract: The effect of pH, temperature and sperm concentration on the fertilisation of Sterechinus neumayeri was investigated. Adult Sterechinus neumayeri were collected from Ellis Fjord Narrows between December and January 2011-12 and held in the Ecotox Field Aquarium Module until used. Between 3-4 male and female individuals were spawned using 0.5M KCl and gametes were collected separately before being ... fertilised in treatment.
The data set shows the percentage of fertilised and non-fertilised eggs of Sterechinus neumayeri scored at 20h post-fertilisation. Eggs were fertilised in various combinations of pH, temperature and sperm concentration treatments (pH: 8.0 (Control), 7.8 and 7.6; Temperature: 1 degrees C (Control), 3 degrees C and 5 degrees C; Sperm concentration (sperm:egg ratio): 1000:1 (Control), 750:1, 250: 1, 50:1 and 5:1). At 20h post fertilisation, 5 ml aliquot was removed from fertilisation vials and eggs were counted and determined if they were fertilised or not. Seawater parameters of treatments were measured at the start and end of the experiment.
Detailed information of the spreadsheets are as follows:
Seawater Parameters column headings:
Temperature - measured in degrees C , shows the temperature treatments used
pH - shows the pH levels used
Subheading pH - pH level measured for the day using NIST certified buffers
Subheading MV - pH level measured for the day in millivolts
Subheading Total pH - total pH level in seawater obtained from MV measurements
Subheading Temp - temperature of seawater measured for the day
1 deg C column headings:
Experiment - number of experiments
pH - shows the pH for each treatment
Sperm Concentration - shows the sperm concentration used for each treatment in a egg:sperm ratio
Rep - shows the number of replicates per experiment
Unfertilised eggs - eggs without visible fertilisation envelope and no cleavage after 20h
Fertilised eggs - eggs with visible fertilisation envelope and/or cleavage after 20h
Fertilised deformed eggs - eggs with visible fertilisation envelope but deformed
Total eggs - total eggs scored (whether fertilised or unfertilised)
% Fertilised - fertilised eggs (deformed and non-deformed)/Total eggs
3 deg C and 5 deg C have the same column headings as 1 deg C.
AAS3134 Abatus sp Growth Experiment Davis 2011-12:
The effect of pH and temperature on the growth rate of juvenile Abatus ingens and Abatus shackletoni were investigated. Adult Abatus were collected off Airport Beach in waters 4-5m depth.
Data set shows the growth rate of juveniles of Abatus ingens and Abatus shackletoni after a 4-week exposure to various combinations of pH and temperature. Juveniles of each species was removed from maternal pouches and photographed on the oral side before being exposed to combinations of pH (8.0 (Control), 7.8 and 7.6) and temperature (-1 degrees C (Control) and 1 degrees C) levels. They were incubated in treatments for 4 weeks before being removed and rephotographed. The lengths of 10 spines per juvenile were measured in the pre- and post-experiment photographs using ImageJ and the difference calculated to get a growth rate per juvenile. Seawater parameters of treatments were measured at the beginning of the experiment and subsequently once a day until the end of the experiment.
Detailed information of the spreadsheets are as follows:
A ingens (pre-exp) i.e. juvenile Abatus ingens spine lengths measured before exposure to experimental treatments. Column headings are:
Spine number and length (mm): Length of each spine (1 - 10) measured per juvenile in mm.
R1 - R12: Number of juveniles
A ingens (post-exp) i.e. juvenile Abatus ingens spine lengths measured after 4-week exposure to experimental treatments. Column headings are identical to the above.
A shackletoni (pre-exp) i.e. juvenile Abatus shackletoni spine lengths measured before exposure to experimental treatments. Column headings are identical to the above.
A shackletoni (post-exp) i.e. juvenile Abatus shackletoni spine lengths measured after 4-week exposure to experimental treatments. Column headings are identical to the above.
2011-12 Aquarium pH and temp main headings show different treatment parameters. Column sub-headings are:
Date - Date of measured seawater parameters
Salinity - salinity of seawater measured
Ppm - Amount of CO2 gas pumped into water recorded in parts per million
pH - measured pH of seawater using NIST-certified buffers
MV - pH of seawater recorded in millivolts
Total pH - total pH of seawater derived from MV
Temp - Temperature of seawater measured in degrees C.
Data Set Citation
Dataset Originator/Creator: Ho, M.
Dataset Title: Climate change and urchin fertilisation and the effect on the growth rate of juvenile Abatus sp.
Dataset Series Name: CAASM Metadata
Dataset Release Date: 2013-03-21
Dataset Publisher: Australian Antarctic Data Centre
Dataset DOI: doi:10.4225/15/514A7E3CA9CEBOnline Resource: https://data.aad.gov.au/aadc/metadata/metadata_redirect.cfm?md=/AMD...
This description is a member of a collection. The collection is described in
Start Date: 2011-12-01Stop Date: 2012-02-28
Start Date: 2012-01-01Stop Date: 2012-03-15
OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ECHINODERMS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > MOLLUSKS > BIVALVES
BIOSPHERE > AQUATIC ECOSYSTEMS > BENTHIC HABITAT
ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > CARBON DIOXIDE
Access Constraints These data are publicly available for download from the provided URL.
Use Constraints This data set conforms to the PICCCBY Attribution License
Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_3134... when using these data.
Data Set Progress
Distribution Media: HTTP
Distribution Size: 170 kb
Distribution Format: Word, Excel
Role: TECHNICAL CONTACT
Email: mel at anatomy.usyd.edu.au
University of Sydney Department of Anatomy and Histology F13
Province or State: NSW
Postal Code: 2006
Role: DIF AUTHOR
Phone: +61 3 6232 3244
Fax: +61 3 6232 3351
Email: dave.connell at aad.gov.au
Australian Antarctic Division 203 Channel Highway
Province or State: Tasmania
Postal Code: 7050
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2012-11-09
Last DIF Revision Date: 2016-01-27