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Mass spawning in tropical reef corals.
Science (New York, N.Y.)
|March 16, 1984
Summary
Synchronous multispecific spawning events involving 32 coral species were observed on the Great Barrier Reef. This finding challenges the assumption of internal fertilization and brooding in most corals, revealing widespread external fertilization and larval dispersal.
Area of Science:
- Marine Biology
- Coral Reef Ecology
- Reproductive Biology
Background:
- Generalizations about coral reproduction often assume internal fertilization and brooding of planula larvae.
- Limited data exist on the reproductive strategies of numerous coral species in situ.
Purpose of the Study:
- To investigate the reproductive modes of multiple coral species on the Great Barrier Reef.
- To challenge existing assumptions regarding coral fertilization and larval development.
Main Methods:
- Observation of synchronous multispecific spawning events.
- Documentation of gamete release and fertilization processes.
- Assessment of egg development and planulae longevity.
Main Results:
- Synchronous spawning occurred across 32 coral species following full moons in 1981 and 1982.
- External fertilization and gamete release were observed in all studied species.
- Developmental rates suggest potential for planulae dispersal between reefs.
Conclusions:
- The study invalidates the generalization of internal fertilization and brooding in most corals.
- External fertilization is a prevalent reproductive strategy among Great Barrier Reef corals.
- Coral planulae possess the capacity for dispersal, influencing reef connectivity.