Australian Museum Journal The distribution and biology of Patiriella vivipara (Echinodermata: Asteroidea: Asterinidae) a sea star endemic to southeast Tasmania

Shortform:
Prestedge, 1998, Rec. Aust. Mus. 50(2): 161–170
Author(s):
Prestedge, G. K.
Year published:
1998
Title:
The distribution and biology of Patiriella vivipara (Echinodermata: Asteroidea: Asterinidae) a sea star endemic to southeast Tasmania
Serial title:
Records of the Australian Museum
Volume:
50
Issue:
2
Start page:
161
End page:
170
DOI:
10.3853/j.0067-1975.50.1998.1277
Language:
English
Date published:
07 October 1998
Cover date:
07 October 1998
ISSN:
0067-1975
CODEN:
RAUMAJ
Publisher:
The Australian Museum
Place published:
Sydney, Australia
Subjects:
ECHINODERMATA
Digitized:
11 March 2009
Available online:
16 July 2009
Reference number:
1277
EndNote package:
EndNote file
Title page:
Title page (100kb PDF)
Complete work:
Complete work (3031kb PDF)

Abstract

The asterinid sea star Patiriella vivipara is endemic to southeast Tasmania and has a highly restricted distribution, being only known from four locations. It has an unusual pattern of viviparous reproduction, giving birth to juveniles. In this study the birth rate, growth rate, size and age at commencement of reproduction of P. vivipara was examined in aquaria for a period of six years. The population of P. vivipara at Pittwater was also monitored through monthly examination of a permanent 1m2 quadrat in which the number of adults and juveniles were counted and recorded. These counts were made over an eight-year period. Patiriella vivipara gives birth to juveniles through the year with a period of enhanced reproduction from November to January. Records of water salinity and temperature were taken at Pittwater, as were air temperatures and exposure times during low tide.

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