. Bulletin. Science; Natural history; Natural history. 102 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES *- . v —. Fig. 6. Examples of the topical terminal flourish for each population for both sampling periods. The terminal flourish is a complex of song elements that concludes the song and occurs just after the buzz phrase (Bradley 19""). A) .Anaheim Bay 19~3. B) .Anaheim Bay 198". C) Newport Bay 1973, D) Newport Bay 198", E) Santa Margarita Estuary 19"3 (2-element form). F) Santa Margarita Estuary 1988 (2-element form). G) Santa Margarita Estuary 19"3 (4-elementform).
. Bulletin. Science; Natural history; Natural history. 102 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES *- . v —. Fig. 6. Examples of the topical terminal flourish for each population for both sampling periods. The terminal flourish is a complex of song elements that concludes the song and occurs just after the buzz phrase (Bradley 19""). A) .Anaheim Bay 19~3. B) .Anaheim Bay 198". C) Newport Bay 1973, D) Newport Bay 198", E) Santa Margarita Estuary 19"3 (2-element form). F) Santa Margarita Estuary 1988 (2-element form). G) Santa Margarita Estuary 19"3 (4-elementform). H) Santa Margarita Estuary 1988 (4-element form). I) Agua Hedionda Lagoon 1973. J) Agua Hedionda Lagoon 1988. K) Los Penasquitos Lagoon 19"3 (2-element form). L) Los Penasquitos Lagoon 1988 (2-element form), M) Los Penasquitos Lagoon 1973 (3-element form). N) Los Penasquitos Lagoon 1988 (3-element form). O) San Quintin Bay 19"3. P) San Quintin Bay 19SS. Q) El Rosario Lagoon 1973. R) El Rosario Laaoon 1988. types per song did vary significantly between populations (F = df , P < ). Anaheim Bay songs contain more variety (x = element types song type), while Santa Margarita and Los Penasquitos contain less (x = element types song type respectively). For each population the lexicon similarity index was highest when the 19 ^3 sample was compared to the later sample from that locality, the mean index of similarity (I) for the 5 such comparisons equals There was no relationship between the index of similarity computed between the two samples from a locality and its population size (r = ns). or sample size (r = ;. ns). Thus shifts in the lexicon do not seem to be related directly to population size. Compansons among the populations reveal that neighboring populations share somewhat similar element lexicons. The Spearman rank cor- relation of the index of similarity with distance between populations was — (P < 0
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