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Effects of TAG/DNA ratio and age of cyprids on post-metamorphic growth and survival in the barnacle Balanus amphitrite

Published online by Cambridge University Press:  10 January 2003

Vengatesen Thiyagarajan ,
Tilmann Harder  and
Pei-Yuan Qian
Vengatesen Thiyagarajan
Affiliation:
Department of Biology, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, SAR Hong Kong, China
Tilmann Harder
Affiliation:
Department of Biology, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, SAR Hong Kong, China
Pei-Yuan Qian
Affiliation:
Department of Biology, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, SAR Hong Kong, China
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Abstract

The nauplii of Balanus amphitrite (Cirripedia: Thoracica) were cultured on a daily diet of Chaetoceros gracilis at different concentrations. Both young (zero-day old) and aged (six-day old) cyprids were subject to attachment assays, followed by studies of juvenile growth and survival for two weeks under laboratory conditions. The TAG/DNA ratio of cyprid increased in the following order of food concentrations: 106>105>104 cells ml−1. More than 70% of cyprids metamorphosed in the presence of conspecific settlement factor, irrespective of their TAG/DNA ratio. The juvenile growth and survival in young cyprids surpassed that of the aged cyprids. The TAG/DNA ratio had no significant effect on juvenile growth and survival in both young and aged cyprids. The negative effect of delayed metamorphosis on juvenile growth and survival appeared to be independent of the TAG/DNA ratio.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 83 , Issue 1 , February 2003 , pp. 83 - 88
Copyright
© 2003 Marine Biological Association of the United Kingdom

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