From Australian Oceans Data Network
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Breeding season, larval development and dispersal of the brachiopod, Lingula anatina in north Queensland

Created 23/06/2025

Updated 23/06/2025

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Monthly sampling of adult Lingula anatina was conducted on the intertidal sand flat at Shelly Beach, near Townsville between February 1973 and February 1974. Gonad indices (100xgonad wet weight/total wet weight) were calculated for 20 female specimens from each sample. Smears of gonad tissue from each animal were made and 20 ova per specimen were measured.Oblique plankton hauls were made at 8 stations along a transect between Townsville and Coil Reef at fortnightly intervals between July 1972 and February 1975. The stations were located at 8, 17, 26, 38, 53, 66, 77 and 86 km from Townsville. Paired nets (mesh size 190 µm and 106 µm, each with a 25 cm aperture) were hauled from the bottom or from a maximum depth of 30 m. Larvae from both nets were treated as a single sample. Plankton samples were also collected in Cleveland Bay at a station 5 km from Townsville at least monthly between April 1974 and February 1976 and then weekly until November 1977. Samples were collected using a single net with mesh size of 120 µm and a 7.5 cm diameter aperture. Calibrated flow meters allowed calculation of the volume of water sampled on each occasion.Larvae were counted and the number per cubic metre of water sampled was calculated. A total of 199 larvae were fixed, stained with carmine and mounted on slides. Measurements were made of the width and length of the larval valves and the protegulum and the lophophoral ciri were counted. The stage of development of the pedicle, mantle setae, alimentary tract and muscles were recorded. This research was undertaken to determine the breeding season of the brachiopod, Lingula anatina. Comparisons were made between the occurrence of larvae in the plankton and the results of gonad studies, to confirm the duration of the breeding season.

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Additional Info

Field Value
Title Breeding season, larval development and dispersal of the brachiopod, Lingula anatina in north Queensland
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/fd03d6cc-3919-452c-a2ed-ed25a6dbf592
Contact Point
Australian Ocean Data Network
reception@aims.gov.au
Reference Period 20/11/2017
Geospatial Coverage
Map data © OpenStreetMap contributors
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        146.7,
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      ],
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  "type": "Polygon"
}
Data Portal Australian Oceans Data Network

Data Source

This dataset was originally found on Australian Oceans Data Network "Breeding season, larval development and dispersal of the brachiopod, Lingula anatina in north Queensland". Please visit the source to access the original metadata of the dataset:
https://catalogue.aodn.org.au/geonetwork/srv/eng/csw/dataset/breeding-season-larval-development-and-dispersal-of-the-brachiopod-lingula-anatina-in-north-que1