. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. Figure 4. The cryptic crab Thersandrus compressus (arrow) is a specialist feeder on Avrainvillea that has a negative impact (Hay et al., 1990; Littler and Littler, 1999).. Hay and Fenical, 1988) and highly specialized interactions between the larger forms (, Udotea, Avrainvillea, Caulerpa, Penicillus) and such herbivorous invertebrates as crabs and molluscs have been observed (Hay etal., 1990; Littler and Littler, 1999). Avrainvillea provides microhabitats (Fig. 3), as well as food and shelter (Fig. 4), fo
. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. Figure 4. The cryptic crab Thersandrus compressus (arrow) is a specialist feeder on Avrainvillea that has a negative impact (Hay et al., 1990; Littler and Littler, 1999).. Hay and Fenical, 1988) and highly specialized interactions between the larger forms (, Udotea, Avrainvillea, Caulerpa, Penicillus) and such herbivorous invertebrates as crabs and molluscs have been observed (Hay etal., 1990; Littler and Littler, 1999). Avrainvillea provides microhabitats (Fig. 3), as well as food and shelter (Fig. 4), for many meso- and micro- invertebrates. These one-sided associations have proven (Hay et al., 1990) to be primarily beneficial to the invertebrates and detrimental to the algal host. The mucilage-free spongy textures of Avrainvillea would seem to make them susceptible to epiphytic plant/animal loading. However, we showed in an earlier study (Fig. 5, Littler and Littler, 1999) that the solitary lagoon morphs are able to rapidly produce new fronds by cytoplasmic streaming and translocation through their siphons, a process that is not impaired by cross walls (as is the case of cellular plants). This represents a unique antifouling mechanism (Littler and Littler, 1999) whereby old assimilators and their inhibitory epiphytes can be shed by "blade abandonment/proliferation" at relatively low cost to the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution. Press; National Research Council (U. S. ). Pacific Science Board; Smithsonian Institution; National Museum of Natural History (U. S. ); United States. Bureau of Sport Fisheries and Wildlife. Washington, D. C. : [Smithsonian Press]
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