1996
1997
1996
Species occurrence, as well as relative abundance, was also different between the West and
East side of the basin; elasmobranch specimens
were collected more frequently on "Albanian"
bottoms and relative abundance of most of
teleost commercial species (i.e. hake and red
Fish Biodiversity on South Adriatic Trawlable Bottoms
219
1998
2.5 2.3 2.1 U 1 .r u
1.3 1.1 0.11 0.7 0.5 0.3 0.1
Fig. 3. Distribution per year of diversity values (Shannon
index)
0.9
0.7
0.5
Fig. 4. Distribution per year of evenness values (Pielou index)
mullet) were higher in the same area (data not
reported here). These last results could be due to
a high fishing pressure on Italian shelf, as Ungaro
et al. (1998b) suggested; as regard to the elamobranchs, the high "sensitivity" with respect to
fishery (low fecundity, large length at maturity,
1997
1996
Species occurrence, as well as relative abundance, was also different between the West and
East side of the basin; elasmobranch specimens
were collected more frequently on "Albanian"
bottoms and relative abundance of most of
teleost commercial species (i.e. hake and red
Fish Biodiversity on South Adriatic Trawlable Bottoms
219
1998
2.5 2.3 2.1 U 1 .r u
1.3 1.1 0.11 0.7 0.5 0.3 0.1
Fig. 3. Distribution per year of diversity values (Shannon
index)
0.9
0.7
0.5
Fig. 4. Distribution per year of evenness values (Pielou index)
mullet) were higher in the same area (data not
reported here). These last results could be due to
a high fishing pressure on Italian shelf, as Ungaro
et al. (1998b) suggested; as regard to the elamobranchs, the high "sensitivity" with respect to
fishery (low fecundity, large length at maturity,