Abstract
Abstract The retention of two external tags by striped bass Morone saxatilis was determined directly by holding fish in the Hudson River, New York, in 1984 for up to 24 h (absolute retention) and indirectly by examining fish released into the Hudson River and recaptured up to 2 years later (relative retention). The tags were: (1) an anchor tag, placed into the dorsal musculature, and (2) an internal anchor tag, inserted through an incision in the abdominal musculature. The absolute retention of these tag types, and of a dart tag inserted into the dorsal musculature, also was determined by holding striped bass in outdoor pools for up to 180 d. Retention of anchor tags and internal anchor tags was 100% for striped bass held 24 h in the Hudson River. Retention of internal anchor tags (98.0%) was significantly higher than that of anchor tags (42.0%) among fish at large in the Hudson River for 1 year; in the second year, only internal anchor tags were recovered. Striped bass in holding pools retained anchor ta...
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