In vitro recruitment of Ulva sp. and Enteromorpha sp. on gametophytic and tetrasporophytic thalli of four populations of Chondracanthuschamissoi from Chile |
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Authors: | Cristian R Bulboa Juan E Macchiavello Karina Veliz Erasmo C Macaya and Eurico C Oliveira |
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Institution: | (1) Departamento de Biología a Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Casilla 117, Coquimbo, Chile;(2) Departamento de Botanica, Instituto de Biociências, Universidade de S?o Paulo, S?o Paulo, SP, Brazil |
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Abstract: | Chondracanthus chamissoi is a red alga which is acquiring an increasing economic importance in Chile and becoming a target species for cultivation.
Because epiphytism is a major problem in the mariculture of seaweeds, the recruitment of Ulva sp. and Enteromorpha sp. on gametophytic (cystocarpic) and tetrasporophytic thalli of C. chamissoi was tested in vitro on four populations from different locations in Chile. For Ulva sp., the density, cover and length of the recruits varied between the reproductive phases of the host and among the studied
populations of C. chamissoi. In most experiments, a larger number of epiphytic thalli was observed on gametophytic plants of C. chamissoi; populations from Calderilla and Lechagua had a higher resistance to epiphytism. For Enteromorpha sp., its ability to grow epiphytically on both phases of the host showed a greater variability, but was inferior to that
of Ulva sp. The differential resistance to epiphytism in both reproductive phases and in plant origin indicates the possibility of
obtaining selected strains of C. chamissoi with lower susceptibility to epiphytism that could be utilized in planning maricultural programs. |
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Keywords: | Chile Chondracanthus chamissoi Enteromorpha epiphytism rhodophyta Ulva |
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