. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. EFFECT OF DIETARY PROTEIN CONTENT ON MUSSELS 127. 400 - Diet Figure 1. Protein content, energy content, and C/N ratio of the pro- portions of Diets 1-7 estimated to have been assimilated by (, bio- available for) Mvlilus trossulus Diets were composed of low-protein Iwhrvsisgalbana (LP) or high-protein / galbana (HP), with or without protein microcapsules (PM). RPR refers to the replacement protein ration, and RER refers to the replacement energy ration. supplement in Diet 5. Bioavailable energy contents of ex- perimental
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. EFFECT OF DIETARY PROTEIN CONTENT ON MUSSELS 127. 400 - Diet Figure 1. Protein content, energy content, and C/N ratio of the pro- portions of Diets 1-7 estimated to have been assimilated by (, bio- available for) Mvlilus trossulus Diets were composed of low-protein Iwhrvsisgalbana (LP) or high-protein / galbana (HP), with or without protein microcapsules (PM). RPR refers to the replacement protein ration, and RER refers to the replacement energy ration. supplement in Diet 5. Bioavailable energy contents of ex- perimental diets are calculated in Table II and summa- rized in Figure 1, middle. Ratios for bioavailable C/N of diets were calculated using results from elemental analysis of PM and both LP and HP algae (Table III; Fig. 1 bottom). Measurement of mussel growth rates One week prior to the experiment, which was conducted during May 1992, six hundred juvenile M. trossulus (shell height = 9-16 mm, wet weight = 100-450 mg) were col- lected from a genetically characterized (Kreeger, 1992) population in Yaquina Bay, Oregon. Juvenile mussels rather than adults were used in this study so that all tissue production would be somatic and not influenced by changes in mussel reproductive condition, which could affect dietary protein utilization in adults (Kreeger, 1993). Mussels were acclimated in a continuous flow of sand- filtered (approximately 50 urn) seawater at ambient tem- perature (13-16°C). During acclimation, mussels were fed 104 cells ml~' (approximate final concentration) of HP /. galbana (T-ISO) until 24 h before experimentation; no food was delivered after that time. At the start of the experiment, 480 mussels were removed from the accli- mation system, cleaned of epiphytes and byssus threads, and randomly divided into 24 groups of 20 individuals. The shell of each mussel was dried and numbered using a diamond-tipped etching pen. Individual shell heights (anteroposterior axis) and live
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
