220
N. Ungaro and G. Marano
Table 3. Margaleff richness index (D), Shannon-Wiener diversity index (H) and Pielou's evenness index 0): mean values (mean,
3D, min., max.) for Albanian and Italian shelves. *, significantly different (P
Samples Dmean
SD Dmin
Dmax
Albanian shelf
23
2.28
0.56
1.00
3.14
Italian shelf
52
2.08
0.63
0.82
3.21
Year 1997
Samples Dmean
SD Dmin
Dmax
Albanian shelf
23
2.10* 0.57
1.36
3.78
Italian shelf
52
1.78
0.47
0.70
2.95
Year 1998
Samples Dmean
SD Dmin
Dmax
Albanian shelf
23
2.80* 0.60
1.86
4.48
Italian shelf
52
2.34
0.44
1.36
3.34
large size at birth) (Holden 1974; Walker and
Hislop 1998) could explain some differences
between the two Adriatic sides, but local environmental features should be considered as well.
The sampling methodology could also
strongly affect the results, and the use of univariate ecological indices is a matter of debate
(Huston 1979) for marine resources (Caddy and
Sharp 1986; Caddy and Griffiths 1995).
South Adriatic demersal fish diversity updating (1996-1998) could however be useful for the
development of research (if the same methodology is used) in order to describe future marine
environment changes due to ecological or
anthropical factors.
References
Alfrrevic S (1981) Contribution It la connaissance des caracteristiques bathymetriques et sedimentologiques de l' Adriatique.
FAO Fish Rep 253: 43-52
Artegiani A, Azzolini R. Paschini E (1981) Seasonal thermocline
evolution in the northern and middle Adriatic Sea. FAO Fish
Rep 253: 55-64
Bello G, Rizzi E (1988) I teleostei raccolti nell'Adriatico meridionale nelle campagne sperimentali di pesca a strasdco
1985-87. Quad 1st Ric Fesca Marit 5: 77-90
Bertrand J (1996) Campagne internationale de chalutage demersal an Mediterranee (MEDITS): campagne 1996. Rapp
Hmean
SD Hmin Hmax Jmean
SD Jrnin Jmax
1.69*
0.36 0.78
2.34
0.63
0.10
0.44 0.79
1.40
0,45 0.41
2.25
0.56
0.16
0.18 0.84
Hmean
SD Hmin Hmax Jmean
SD Jmin Jmax
1.52
0.46 0.52
2.12
0.60* 0.16
0.19 0.89
1.53
0.37 0.44
2.42
0.72
0.16
0.22 0.93
Hmean
SD Hmin Hmax Jmean
SD Jmin Jmax
2.00*
0.39 0.67
2.54
0.71
0.14
0.26 0.88
1.77
0.30 0.78
2.44
0.69
0.11
0.29 0.89
Final Rapp Contrat CEE-IFREMER-IEO-SIBM-NCMR
(MED/95119/54165127) 1-2: 1-71
Buljan M, Zore-Armanda M (1979) Hydrographic properties of
the Adriatic Sea in the period from 1965 through 1970. Acta
Adriat 20: 1-368
Caddy JF, Griffiths RC (1995) Living marine resources and their
sustainable development. FAO Fish Tech Pap 353
Caddy JF, Sharp GD (1986) An ecological framework for marine
fishery investigations. FAO Fish Tech Pap (283): 152 p.
Castino M, Roletto E (1991) Statistica applicata. Piccin, Padova
Holden MJ (1974) Problems in the rational exploitation of elasmobranch populations and some suggested solutions. In:
Harden Jones FR (ed) Sea fisheries research. Halsted Press, J.
Wiley and Sons, New York. pp 117-137
Huston M (1979) A general hypothesis of species diversity. Am
Nat 113: 81-101
Magurran AE (1991) Ecological diversity and its measurement.
Chapman and Hall, London
Oliver MA (1990) Kriging: a method of interpolation for geographical information systems.Int J Geog Inf Syst 4: 313-332
Ungaro N, Marano G, Rizzi E, Marzano MC (1996) Demersal
Squaliformes and Rajiformes in the South-Western Adriatic
Sea: trawl-surveys 1985-1994. FAO Fish Rep 533 Suppl: 8796
Ungaro N, Marano G. Vlora A, Martino M (1998a) Space-time
variations of demersal fish assemblages in South-Western
Adriatic Sea. Vie Milieu 48: 191-201
Ungaro N.Marano G,Marsan R,Osmani K (1998b) Demersal fish
assemblages biodiversity as an index of fishery resources
exploitation. Ital J Zoo165 Suppl: 511-516
Walker PA, Hislop JRG (1998) Sensitive skates or resilient raysl
Spatial and temporal shifts in ray species composition in the
central and north-western North Sea between 1930 and present day. ICES J Mar Sci 55: 392-402
N. Ungaro and G. Marano
Table 3. Margaleff richness index (D), Shannon-Wiener diversity index (H) and Pielou's evenness index 0): mean values (mean,
3D, min., max.) for Albanian and Italian shelves. *, significantly different (P
Samples Dmean
SD Dmin
Dmax
Albanian shelf
23
2.28
0.56
1.00
3.14
Italian shelf
52
2.08
0.63
0.82
3.21
Year 1997
Samples Dmean
SD Dmin
Dmax
Albanian shelf
23
2.10* 0.57
1.36
3.78
Italian shelf
52
1.78
0.47
0.70
2.95
Year 1998
Samples Dmean
SD Dmin
Dmax
Albanian shelf
23
2.80* 0.60
1.86
4.48
Italian shelf
52
2.34
0.44
1.36
3.34
large size at birth) (Holden 1974; Walker and
Hislop 1998) could explain some differences
between the two Adriatic sides, but local environmental features should be considered as well.
The sampling methodology could also
strongly affect the results, and the use of univariate ecological indices is a matter of debate
(Huston 1979) for marine resources (Caddy and
Sharp 1986; Caddy and Griffiths 1995).
South Adriatic demersal fish diversity updating (1996-1998) could however be useful for the
development of research (if the same methodology is used) in order to describe future marine
environment changes due to ecological or
anthropical factors.
References
Alfrrevic S (1981) Contribution It la connaissance des caracteristiques bathymetriques et sedimentologiques de l' Adriatique.
FAO Fish Rep 253: 43-52
Artegiani A, Azzolini R. Paschini E (1981) Seasonal thermocline
evolution in the northern and middle Adriatic Sea. FAO Fish
Rep 253: 55-64
Bello G, Rizzi E (1988) I teleostei raccolti nell'Adriatico meridionale nelle campagne sperimentali di pesca a strasdco
1985-87. Quad 1st Ric Fesca Marit 5: 77-90
Bertrand J (1996) Campagne internationale de chalutage demersal an Mediterranee (MEDITS): campagne 1996. Rapp
Hmean
SD Hmin Hmax Jmean
SD Jrnin Jmax
1.69*
0.36 0.78
2.34
0.63
0.10
0.44 0.79
1.40
0,45 0.41
2.25
0.56
0.16
0.18 0.84
Hmean
SD Hmin Hmax Jmean
SD Jmin Jmax
1.52
0.46 0.52
2.12
0.60* 0.16
0.19 0.89
1.53
0.37 0.44
2.42
0.72
0.16
0.22 0.93
Hmean
SD Hmin Hmax Jmean
SD Jmin Jmax
2.00*
0.39 0.67
2.54
0.71
0.14
0.26 0.88
1.77
0.30 0.78
2.44
0.69
0.11
0.29 0.89
Final Rapp Contrat CEE-IFREMER-IEO-SIBM-NCMR
(MED/95119/54165127) 1-2: 1-71
Buljan M, Zore-Armanda M (1979) Hydrographic properties of
the Adriatic Sea in the period from 1965 through 1970. Acta
Adriat 20: 1-368
Caddy JF, Griffiths RC (1995) Living marine resources and their
sustainable development. FAO Fish Tech Pap 353
Caddy JF, Sharp GD (1986) An ecological framework for marine
fishery investigations. FAO Fish Tech Pap (283): 152 p.
Castino M, Roletto E (1991) Statistica applicata. Piccin, Padova
Holden MJ (1974) Problems in the rational exploitation of elasmobranch populations and some suggested solutions. In:
Harden Jones FR (ed) Sea fisheries research. Halsted Press, J.
Wiley and Sons, New York. pp 117-137
Huston M (1979) A general hypothesis of species diversity. Am
Nat 113: 81-101
Magurran AE (1991) Ecological diversity and its measurement.
Chapman and Hall, London
Oliver MA (1990) Kriging: a method of interpolation for geographical information systems.Int J Geog Inf Syst 4: 313-332
Ungaro N, Marano G, Rizzi E, Marzano MC (1996) Demersal
Squaliformes and Rajiformes in the South-Western Adriatic
Sea: trawl-surveys 1985-1994. FAO Fish Rep 533 Suppl: 8796
Ungaro N, Marano G. Vlora A, Martino M (1998a) Space-time
variations of demersal fish assemblages in South-Western
Adriatic Sea. Vie Milieu 48: 191-201
Ungaro N.Marano G,Marsan R,Osmani K (1998b) Demersal fish
assemblages biodiversity as an index of fishery resources
exploitation. Ital J Zoo165 Suppl: 511-516
Walker PA, Hislop JRG (1998) Sensitive skates or resilient raysl
Spatial and temporal shifts in ray species composition in the
central and north-western North Sea between 1930 and present day. ICES J Mar Sci 55: 392-402