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  • 1
    Electronic Resource
    Electronic Resource
    Genetic variation in Symbiodinium isolates from giant clams based on random-amplified-polymorphic DNA (RAPD) patterns (2000)
    Springer
    Marine biology 136 (2000), S. 829-836 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We have compared the random-amplified-polymorphic DNA (RAPD) patterns of Symbiodinium isolates from seven species of giant clams to investigate the large genetic variation that we previously reported for this group of dinoflagellate symbionts using allozyme analysis. Comparisons of 163 RAPD characters by unweighted pair-group arithmetic-average cluster analysis (UPGMA) corroborate our previous findings that giant clams associate with a large number of genetically distinguishable algal symbionts, and that the isolates from a single Tridacna gigas individual form a group of closely related algae. However, the overall topology of the UPGMA tree constructed from RAPD data differs from that of the previous allozyme data, indicating that the combined data we have collected to date are insufficient to accurately infer phylogenetic affiliations between the isolates studied. Comparisons of our data set with those published for strains of Gymnodinium catenatum, a toxic dinoflagellate with a sexual life stage, shows that our isolates are even more diverse. Algal isolates from giant clams have a level of RAPD variation comparable to organisms that are able to undergo sexual recombination. This study demonstrates the sensitivity of the RAPD technique in detecting genetic diversity in this group of algae, and highlights the need for more comparative data for the major clades of Symbiodinium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002270000290
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Growth of Acropora pulchra (1984)
    Springer
    Marine biology 81 (1984), S. 209-215 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The growth of both undisturbed colonies and transplants of the branching coral Acropora pulchra (Brook) was studied over a 17-month period in the reef of Bolinao, Pangasinan, northern Philippines. Growth rate was monitored using linear measurement techniques. Of the environmental factors measured, both temperature and day length, in the range of natural conditions encountered, correlated negatively with the growth and branching of the undisturbed corals and, to a lesser extent, growth of the transplants. Temperature, in addition, appeared to affect mortality of the transplants significantly. Using various methods of computation of data for the undisturbed colonies, the projected annual growth rate of the species was found to range from 13.1 to 15.8 cm yr-1. Growth rates of the transplants were in general considerably lower.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00393119
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Reef management in developing countries: a case study in the Philippines (1997)
    Springer
    Coral reefs 16 (1997), S. S3 
    Details
    ISSN: 1432-0975
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract.  In general the most attractive and economically valuable reefs in the world are found in developing countries. Because of these attributes, they have also become the most endangered. Due to anthropogenic threats to their productivity, there is a growing need for management. Programs for their conservation and rehabilitation are being mounted at local, regional, and international levels. Local efforts are widely distributed, showing signs of both failure and success. The situation in developing countries differs from that which prevails in developed countries for various reasons, including level of awareness, infrastructure, and law enforcement. A case history of saving a coral reef ecosystem is described in this study. It involves a recent plan to build a cement factory in the Philippines at Bolinao.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003380050236
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Growth of Acropora pulchra (1985)
    Springer
    Marine biology 87 (1985), S. 203-209 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Transplantation experiments were carried out on the branching hermatypic coral Acropora pulchra (Brook) from October 1980 to March 1982 in the northern Philippines. Primary objectives were to determine the effects on the coral of the stresses associated with transplantation, relocation, and the use of different artificial substrates such as flagstones and tires, and to determine possible effects of sedimentation on survival and growth of the transslants. Results of transplantation at different times of the year were also assessed. Comparisons of the responses of transplants with those of undisturbed, control colonies indicated possible significant effects of transplantation tending to retard growth. Sedimentation likewise appeared to suppress growth of the transplants. Growth and survival of the transplants may have been further inhibited by transplantation during the warmer times of the year, and by setting them in prone positions on tires. Effects of relocation at varying distances from source colonies appeared to be negligible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00539430
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    Paper (German National Licenses)
    Fulltext
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