Fishery Bulletin 95 ( 1 ), 1997 
1 18 
from July and October, whereas December was dif- 
ferent only from February and July. Generally, there 
were significant differences between winter (large 
Table 2 
Monthly diversity of commercial fisheries landings in 
Broward County, Florida, during 1989. H' = Shannon- 
Wiener diversity; V' = evenness; R = species richness. 
Month 
H' 
V' 
R 
Jan 
1.73 
0.40 
48 
Feb 
2.04 
0.47 
50 
Mar 
1.49 
0.34 
52 
Apr 
1.49 
0.34 
54 
May 
1.36 
0.31 
51 
Jun 
1.41 
0.32 
36 
Jul 
1.90 
0.44 
44 
Aug 
2.66 
0.62 
48 
Sep 
2.69 
0.62 
52 
Oct 
2.35 
0.54 
54 
Nov 
1.90 
0.44 
55 
Dec 
1.56 
0.36 
53 
Mean 
1.88 
0.43 
50 
proportion of swordfish and other offshore pelagics) 
and late summer-fall (relatively small proportions 
of offshore pelagics with a mix of species from other 
groups) assemblages. 
Classification 
Cluster analysis classified trips on the basis of the 
similarity of the species assemblages landed. I used 
an artificial, but operational, system of general habi- 
tat associations and species complexes to classify 
species into eleven groups (Table 1). Groupers and 
snappers inhabit a wide variety of habitats (Smith, 
1976; Robins et al., 1986) and were frequently landed 
together. They were assigned to their own group 
rather than limited to a single habitat. Similarly, bait 
fish often formed a unique cluster and thus a “bait 
fish” group was used. “Miscellaneous food/industrial 
fish (UM)” was a “catch all” group used by fishermen 
to report species that were not explicitly given an 
identification code by the MFIS. It usually included 
such species as angelfishes (Pomacanthidae), 
parrotfishes (Scaridae), butterfish ( Peprilus spp.), 
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 
Month 
£§ Offshore Pelagics 0 Grouper-snappers ^ Bait Fishes ® Lobsters ■ Unknown Misc. □ Other 
Figure 2 
Total monthly landings in Broward County, Florida, during 1989 and the contribution of each spe- 
cies group. See Table 1 for species within each group. Each segment of each vertical bar represents 
the portion of total landings attributable to one of the five major groups (offshore pelagics, grouper- 
snappers, lobsters, bait fishes, and unknown miscellaneous fishes) or other species. 
