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Utilization patterns of surfzone inhabiting fish.

33

describe pattern of species utilization, mean body length of most abundant species were analyzed by

month (Fig. 4). The Clupeiforms,

except H.

clupeola,

showed low monthly catches that occurred mainly during the warmer months (February to May) (Fig. 4 b-d). Monthly mean SL of S. brasiliensis 1 increased from 40 to 80 mm between February and April (Fig. 4 b), but no other species showed this increase in SL. O. bonariensis occurred during most sampling months, but the highest frequencies were observed during June and July (winter months), when small animals (ca. 60 mm) were caught in high numbers. The mean size of

these individuals, however, increased in successive samples until ca. 120 mm (Fig. 4 e). The palometa Trachinotus goodei Jordan & Evermann 1896 was not sampled during spring or early summer (Fig. 4 h). The bluefish Pomatomus saltatrix (Linnaeus 1766) was absent at the end of autumn, nevertheless, its size doubled (from ca. 60 to 120 mm) during the entire period (Fig. 4 i). H. clupeola, T. carolinus and the Gulf kingcroaker Menticirrhus littoralis (Holbrook 1847) were present in most samples (Fig. 4 a, f e g), but, H. clupeola was the only species to show a clear pattern of growing average until late January (ca. 50 to 80 mm) (Fig. 4 a).

Figure 3. ANOVA test for temporal variation of (a) fish number and (b) biomass, (c) richness, (d) Shannon-Wiener diversity and (e)

Pielou evenness from Jun/04 to May/05 in surf zone habitats in Pontal do Paraná, Brazil. (

Mean,

S.E. and

S.D.).

Pan-American Journal of Aquatic Sciences (2007), 2 (1): 27-39

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