. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ASCIDIAN CURRENT UTILIZATION. FIGURE 1. A) Known geographical range of Stycla inontcrcycnsis on the Pacific Coast of North America, showing main study areas. Subtidal sites are capitalized. Unlabelled arrows indicate sites where Stycla was not found. B) Mills Peninsula in Barkley Sound, British Columbia, showing 2 protected outer coast sites and a nearby protected site. C) Study sites on the Monterey Peninsula, California. MATERIALS AND METHODS We collected or observed Styela montereyensis at 11 sites from southern Cali- for
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ASCIDIAN CURRENT UTILIZATION. FIGURE 1. A) Known geographical range of Stycla inontcrcycnsis on the Pacific Coast of North America, showing main study areas. Subtidal sites are capitalized. Unlabelled arrows indicate sites where Stycla was not found. B) Mills Peninsula in Barkley Sound, British Columbia, showing 2 protected outer coast sites and a nearby protected site. C) Study sites on the Monterey Peninsula, California. MATERIALS AND METHODS We collected or observed Styela montereyensis at 11 sites from southern Cali- fornia to Vancouver Island (Fig. 1), thereby covering the species' known geo- graphical range (Van Name, 1945). Although Styela characteristically occurs in areas of vigorous water movement (Fay and Vallee, 1979), its occasional appear- ance in quiet bays allowed us to compare morphology of specimens collected from a variety of current regimens. We made no quantitative measurements of current velocities, so our designations of sites as "open coast," "protected outer coast," or "protected bay" are based on subjective evaluation of local geography, surf, and fauna, following the criteria of Ricketts and Calvin (1962). The nature of the substratum, approximate incline of the surface of attachment, orientation of the attachment surface relative to the direction of the prevailing surf or surge, depth or tide level, and approximate dimensions of the substratum were recorded for each individual we encountered while diving or collecting in; tidally. Relative stalk length of each animal was determined in the laboratory measuring the compression-resistant portion of the stalk and expressing thi as a fraction of the total body length exclusive of expanded 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
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
