Journal of Applied Phycology

, Volume 7, Issue 6, pp 539–543

Laboratory-induced development of the ice-ice disease of the farmed red algae Kappaphycus alvarezii and Eucheuma denticulatum (Solieriaceae, Gigartinales, Rhodophyta)

Authors

  • Danilo B. Largo
    • Laboratory of Aquatic Environmental Science, Department of Aquaculture, Faculty of AgricultureKochi University
  • Kimio Fukami
    • Laboratory of Aquatic Environmental Science, Department of Aquaculture, Faculty of AgricultureKochi University
  • Toshitaka Nishijima
    • Laboratory of Aquatic Environmental Science, Department of Aquaculture, Faculty of AgricultureKochi University
  • Masao Ohno
    • Usa Marine Biological Institute, Kochi University
Article

DOI: 10.1007/BF00003940

Cite this article as:
Largo, D.B., Fukami, K., Nishijima, T. et al. J Appl Phycol (1995) 7: 539. doi:10.1007/BF00003940

Abstract

The most common perception of unfavorable environmental factors causing the ice-ice disease in the farmed seaweeds, Kappaphycus and Eucheuma, was demonstrated in this study for the first time using stressful conditions of abiotic factors in a continuous culture system. Light intensity of less than 50 μmol photon m−2 s−1 and salinity of 20% or less induced ice-ice whitening characterized by short segments at midbranches which were similar to those observed in the Philippine seaweed farms, while temperatures of up to 33–35 °C resulted in wide-scale whitening leading to complete damage of the branches. These effects were preceded by slow growth rates from an optimum of 3.7% d−1 to almost −2.0% d−1. Mechanical stress by wound injury did not result to ice-ice whitening similar to the above. Environmental factors observed to trigger ice-ice in the laboratory, although may not necessarily parallel those in the field, may act synergestically to produce similar effects.

Key words

ice-ice disease environmental factors Kappaphycus/Eucheuma seaweed farming Philippines

Copyright information

© Kluwer Academic Publishers 1995