International Bottom Trawl Survey
in the Mediterranean

 

Volume 4

 

Medits Survey
1997

 

 

Biological report

 

Final report

May 1998

 

 

Project 95 / 19 IFREMER - CE
Project 95 / 54 IEO - CE
Project 95 / 65 SIBM - CE
Project 95 / 27 NCMR - CE

 

The Medits programme is conducted owing to the financial support from the European Commission (DG XIV) and the following partners, the IEO for Spain, the IFREMER and the Territorial Collectivity of Corsica for France, the Italian Minister of forest, agricultural and food resources (DG fisheries and aquaculture) for Italy as well as Slovenian, Croatian and Albanian areas, the N CMR for Greece.

 

This report does not necessarily reflect the views of the European Commission and in no way anticipates any future opinion of the Commission. Permission to copy, or reproduce the contents of this report is granted subject to citation of the source of this material. The study has been carried out with the financial assistance of the European Commission.

 

 

 

Synopsis

 

Volume 4

Medits 97 Biological report

 

 

Biological report of the survey

 

Survey Results for Spain: from the Alboran Sea to the Catalan Sea by Luis Gil de Sola and Maria Gonzalez

Survey Results for France: Gulf of Lions and East Corsica by Arnauld Souplet

Survey Results for Italy - area M1 - Ligurian and Tyrrhenian Seas by G.D. Ardizzone and A. Belluscio

Survey Results for Italy - area M2 - Sardinia by M. Murenu, D. Cuccu, M. C. Follesa, A. Sabatini & A. Cau

Survey Results for Italy - area M3 - South Tyrrhenian Sea and Strait of Sicily by G. Garofalo, G. Norrito, D. Levi

Survey Results for Italy - area M4 - Part 1: SW Adriatic and NW Ionian Seas by G. Marano*, A. Tursi**, G. D'Onghia**, N. Ungaro*

Survey Results for Italy - area M4 - Part 2: Albany and SE Adriatic Sea by G. Marano*, N. Ungaro*, A. Flloko**, R. Kristo***

Survey Results for Italy - area M5 - Part 1: Italian area by C. Piccinetti

Survey Results for Italy - area M5 - Part 2: Croatian area by S. Jukic-Peladic, N. Vrgoc, M. Tonkovic and S. Krstulovic-Šifner

Survey Results for Italy - area M5 - Part 3: Slovene area by C. Piccinetti

Survey Results for Italy - area M5 - General situation by C. Piccinetti

Survey Results for Greece - area G1: North Aegean Sea by A. Kallianiotis, M. Lambrakis, P. Vidoris and K. Sofronidis

Survey Results for Greece - area G2 - part 1: Argosaronikos area and Ionian Sea by Chrissi-Yianna Politou and Eugenia Lefkaditou

Survey Results for Greece - area G2 - part 2: South Aegean Sea by G. Tserpes, P. Peristeraki and N. Tsimenides

Biological results: Global analysis

Tables

Sampling scheme on the different strata

Codes and usual names of the reference species

 

Figures

Boundaries of the subareas

Length distribution of the reference species

in the following order:

Spain

France

Italy M1

Italy M2

Italy M3

Italy M4

Albania

Italy M5

Slovenia

Croatia

Greece G1

Greece G2

Biomass classes

Biomass indices 1994-1997

 

Biological results
Medits 97

 

Each of the regional teams has produced a biological analysis of the results obtained in their area during the Medits 97 survey. To make easier the comparison between the years, this analysis is presented suing the same references as for the previous ones. Particularly, all the analysis are based on biomass and abundance estimates by species and by geographical strata. All the teams calculated their standard statistical estimates using the same specific software (Souplet, 1996).

Using the same estimates, a common analysis of the survey results has been done during a general meeting (Madrid, 6-8/11/97). This analysis includes general considerations on the reference species biomass at the scale of the whole survey as far as a preliminary analysis of the year to year biomass variations pointed out for some of the main species in the main regions.

This report presents successively the results obtained at these two levels. The document is completed by a series af tables and figures related to the biomass/abundance indices and length frequency distributions of the species included in the reference list.