Please use this identifier to cite or link to this item:

Population Structure, Spawning, and Growth of the Coral Reef Asteroid Linckia laevigata (Linnaeus)

File SizeFormat 
v31n1-13-30.pdf7.12 MBAdobe PDFView/Open

Item Summary

Title: Population Structure, Spawning, and Growth of the Coral Reef Asteroid Linckia laevigata (Linnaeus)
Authors: Yamaguchi, Masashi
Issue Date: Jan 1977
Publisher: University of Hawaii Press
Citation: Yamaguchi M. 1977. Population structure, spawning, and growth of the coral reef asteroid Linckia laevigata (Linnaeus). Pac Sci 31(1): 13-30.
Abstract: The blue coral reef asteroid Linckia laevigata (Linnaeus) makes up
conspicuous adult-only populations on shallow reef flat habitats in the tropical
Indo-West-Pacific. Monthly year-round census showed a consistent unimodal
size-frequency distribution, with mean arm radius for the population fluctuating
from 93.8 to 99.4 mm, at Asan reef flat, Guam, Mariana Islands. This census failed
to detect a significant influx of smaller individuals within the population. Searching
efforts for this and other asteroids yielded only three pretransformation-stage
juveniles and less than 10 transforming young (with arm radius of approximately
50 mm) during a 3-year period (1972 through 1974), in spite of the omnipresence
of adults. The L. laevigata population at Asan showed a peak breeding period
during the summer months (May to August), as indicated by the spawning
activities of sampled adults after they had been injected with 1-methyladenine.
Laboratory-grown juveniles attained a mean arm radius of 13.9 mm, 14 months
after metamorphosis (15 months after spawning). The juvenile-to-adult transformation
is estimated to take place in average L. laevigata at about 2 years of age.
Individually marked adults in the field increased 1.1 mm (approximately 1 percent)
in arm radius and 0.9 g (approximately 7 percent) in underwater weight (means for
32 individuals) during 5.5 months. The growth rate and population structure
indicate that this population of L. laevigata has a low turnover rate with a low level
of recruitment.
ISSN: 0030-8870
Appears in Collections:Pacific Science Volume 31, Number 1, 1977

Please contact if you need this content in an alternative format.

Items in ScholarSpace are protected by copyright, with all rights reserved, unless otherwise indicated.