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Aspects of the larval biology of the sea anemones Anthopleura elegantissima and A. artemisia
Author(s) -
Weis Virginia M.,
Verde E. Alan,
Pribyl Alena,
Schwarz Jodi A.
Publication year - 2002
Publication title -
invertebrate biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.486
H-Index - 42
eISSN - 1744-7410
pISSN - 1077-8306
DOI - 10.1111/j.1744-7410.2002.tb00059.x
Subject(s) - biology , zooxanthellae , larva , sea anemone , metamorphosis , symbiosis , cnidaria , ecology , zoology , botany , coral , bacteria , genetics
. We investigated several aspects of the larval biology of the anemone Anthopleura elegantissima , which harbors algal symbionts from two different taxa, and the non‐symbiotic A. artemisia . From a 7‐year study, we report variable spawning and fertilization success of A. elegantissima in the laboratory. We examined the dynamics of symbiosis onset in larvae of A. elegantissima . Zoochlorellae, freshly isolated from an adult host, were taken up and retained during the larval feeding process, as has been described previously for zooxanthellae. In addition, larvae infected with zooxanthellae remained more highly infected in high‐light conditions, compared to larvae with zoochlorellae, which remained more highly infected in low‐light conditions. These results parallel the differential distribution of the algal types observed in adult anemones in the field and their differential tolerances to light and temperature. We report on numerous failed attempts to induce settlement and metamorphosis of larvae of A. elegantissima , using a variety of substrates and chemical inducers. We also describe a novel change in morphology of some older planulae, in which large bulges, resembling tentacles, develop around the mouth. Finally, we provide the first description of planulae of A. artemisia and report on attempts to infect this non‐symbiotic species with zooxanthellae and zoochlorellae.