Scartella cristata - Amazon S3

34
80
n=9
70
n=80
60
TL (mm)
50
40
30
n=0
20
10
0
Galveston
Por t Aransas
South Padre Island
Fig. 14. Mean total length and its standa rd error for Labris omus n uchipin nis at Galveston, Port Ara nsas, and South Padre
Island, TX from May 2000 to August 2001. n represents the number of individuals sampled from each location.
Species Diversity and Evenness
Monthly mean blenny diversity ( H ′ ) was 0.23±0.02, 0.11±0.11, and 0.09±0.08 for Galveston,
Port Aransas, and South Padre Island, respectively (Fig. 15). Galveston had significantly higher diversity
than did other sites (p=0.001). Monthly diversity never exceeded 0.4 at any site and was never greater
than 0.22 at South Padre Island. Although highly variable, diversity generally peaked in late spring,
declined through summer and fall, and increased by late winter. This pattern was best defined at Port
Aransas (Fig. 16).
Evenness values of 0.64±0.37, 0.29±0.30, and 0.30±0.26 were observed for Galveston, Port
Aransas, and South Padre Island respectively (Fig. 15). Galveston also exhibited a significantly higher
evenness value (p=0.001) than did other sites. Evenness at Galveston remained fairly high throughout
summer and fall (0.60-0.98), declined dramatically in winter and was relatively low (0.00-0.40) through
spring. Evenness at Port Aransas mirrored species diversity by peaking in spring and diminishing through
fall. The only pattern in species evenness at South Padre Island was values in 2000 were considerably
higher than those in 2001 (Fig. 16).