MATERIALS AND METHODS
Animal collection and maintenance
Two different clones ofthe sea anemone Haliplanella luciae were removed from rocks or small oyster clumps near the Florida State University Marine Laboratory, Turkey Point, Florida. A third H. luciae clone was collected by L. L. Minasian at the mouth of the Indian River in Delaware. Monoclonal H. luciae stock cultures were established following frequent fission events, beginning with isolated individuals of each H. luciae clone. Stock culture anemones were kept in culture dishes filled with natural sea water (28—30%o),which was changed daily and held at 17—19°C. The sea anemones were fed to repletion twice weekly with freshly hatched Artemia nauplii according to the methods of Minasian and Mariscal (1979). Specimens of the sea anemone Diadumene gracillima (which can have catch tentacles) were collected from oyster clumps near the FSU Marine Lab. Unlike H. luciae, D. gracillima seldom reproduces asexually. Thus, experimental D. gracillima were not monoclonal. Diadumene gracillima was maintained in culture dishes filled with sea water by the methods described above for H. luciae stock cultures.
Induced catch tentacle development
Three different biclonal, intraspecific cultures were established using the three H. luciae clones. Forty-eight organisms, twenty-four of each clone, were placed in
508 G. M. WATSONAND R. N. MARISCAL
70 mm diameter culture dishes filled with sea water to a height of 10 mm (40 ml) in order to crowd the anemones and insure frequent tentacle contacts throughout the culture. In addition, a single interspecific anemone culture was established using twenty-four monoclonal H. luciae mixed with an equal number of D. gracillima in a culture dish filled with 40 ml of sea water. In order to control against possible effects of crowding on catch tentacle development, a control culture of forty-eight monoclonal H. luciae was established in a culture dish as before. The procedures described above were intended to stimulate the development of catch tentacles in H. luciae. Anemone cultures were screened at approximately one week intervals for developing catch tentacles, mature catch tentacles, and regressing catch tentacles.
MATERIALS AND METHODS
Animal collection and maintenance
Two different clones ofthe sea anemone Haliplanella luciae were removed from rocks or small oyster clumps near the Florida State University Marine Laboratory, Turkey Point, Florida. A third H. luciae clone was collected by L. L. Minasian at the mouth of the Indian River in Delaware. Monoclonal H. luciae stock cultures were established following frequent fission events, beginning with isolated individuals of each H. luciae clone. Stock culture anemones were kept in culture dishes filled with natural sea water (28—30%o),which was changed daily and held at 17—19°C. The sea anemones were fed to repletion twice weekly with freshly hatched Artemia nauplii according to the methods of Minasian and Mariscal (1979). Specimens of the sea anemone Diadumene gracillima (which can have catch tentacles) were collected from oyster clumps near the FSU Marine Lab. Unlike H. luciae, D. gracillima seldom reproduces asexually. Thus, experimental D. gracillima were not monoclonal. Diadumene gracillima was maintained in culture dishes filled with sea water by the methods described above for H. luciae stock cultures.
Induced catch tentacle development
Three different biclonal, intraspecific cultures were established using the three H. luciae clones. Forty-eight organisms, twenty-four of each clone, were placed in
508 G. M. WATSONAND R. N. MARISCAL
70 mm diameter culture dishes filled with sea water to a height of 10 mm (40 ml) in order to crowd the anemones and insure frequent tentacle contacts throughout the culture. In addition, a single interspecific anemone culture was established using twenty-four monoclonal H. luciae mixed with an equal number of D. gracillima in a culture dish filled with 40 ml of sea water. In order to control against possible effects of crowding on catch tentacle development, a control culture of forty-eight monoclonal H. luciae was established in a culture dish as before. The procedures described above were intended to stimulate the development of catch tentacles in H. luciae. Anemone cultures were screened at approximately one week intervals for developing catch tentacles, mature catch tentacles, and regressing catch tentacles.
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