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Mortality of the gastropod Lepsiella vinosa on the West Head rocky shore in Victoria

Created 23/06/2025

Updated 23/06/2025

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This study investigated mortality of egg capsules, juveniles, and adult Lepsiella vinosa on the rocky shore at West Head, Victoria. Observations conducted between 1974 and 1979 indicated that polychaetes, nematodes, nemerteans, planarians and mollusks all prey on L.vinosa egg capsules. It was estimated that at least 43% of embryos found over the study period did not hatch.
To estimate juvenile mortality, an area of about 0.5 m2 of shingle beach immediately above the rocky shore was excavated to a depth of 15 cm on 21 July 1978. The shingle was sieved through a series of sieves with the smallest size being 1.00 mm. There were 220 empty L.vinosa shells found in the sample and the majority was between 9.5 and 14.0 mm long. A size-frequency distribution of L.vinosa shells was used to estimate the age of death for each individual. The causes of juvenile and adult morality were probably predation by crabs (e.g. Carcinus maenus) and adverse environmental conditions associated with tide emersion periods and desiccation. The results indicated that juvenile mortality is generally low in the first 3 years after hatching and steadily increases throughout the remainder of the life span (up to 10 years). There was no L.vinosa found in the gut contents of the parrotfishes P.fucicola or P.tetricus. Observations of the study area during high tide periods suggested that no other species of fish or bird prey on L.vinosa at West Head.

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Additional Info

Field Value
Title Mortality of the gastropod Lepsiella vinosa on the West Head rocky shore in Victoria
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/78957147-fd19-4c0d-8feb-b89755917b56
Contact Point
Australian Ocean Data Network
rsynnot@baarrooka.com.au
Reference Period 01/06/1975 - 01/12/1978
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    145.03,
    -38.48
  ],
  "type": "Point"
}
Data Portal Australian Oceans Data Network

Data Source

This dataset was originally found on Australian Oceans Data Network "Mortality of the gastropod Lepsiella vinosa on the West Head rocky shore in Victoria". Please visit the source to access the original metadata of the dataset:
https://catalogue.aodn.org.au/geonetwork/srv/eng/csw/dataset/mortality-of-the-gastropod-lepsiella-vinosa-on-the-west-head-rocky-shore-in-victoria1