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Overall Objective: |
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Estimate of the small pelagic fish
biomass and distribution pattern in the Adriatic Sea and
the relationship with environmental variables. |
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Methodology: |
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Combined acoustic and biological
sampling survey of the Northern Adriatic Sea with
associated environmental parameters monitoring. |
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Preliminary Results: |
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The successful execution in November
2001 of the AdriaMed-organized first-ever acoustic survey
covering all the northern end of the Adriatic Sea (i.e.
international and national waters of Croatia, Italy and
Slovenia) has highlighted as the comprehensive coverage of
the area of occurrence of the surveyed stocks a basic
requirement.
The survey promoted by AdriaMed in the northern end of GSA
17 and a successive survey carried out by the Institute of
Marine Biology of Kotor (Montenegro) and the ISMAR of
Ancona (Italy) in part of GSA 18 demonstrated that
important differences resulted concerning the estimated
biomass when considering only the west side and not the
entire north Adriatic Sea, whereas there were not
significant differences in species composition (<2%).
Moreover, the western and the eastern parts of south
Adriatic would seem to be deeply different, both in
species composition (differences from 20% to 30%) and in
the level of biomass. This testifies to the need to
perform whole area coverage echosurvey to obtain
meaningful stock size estimates.
AdriaMed is promoting the establishment of permanent
international acoustic monitoring on pelagic stock
variability on an annual basis. Such a routine monitoring
scheme would ideally imply the simultaneous and
coordinated use of more than one research vessel, thus
reducing the time needed to cover the whole area. These
vessels should have similar shipping characteristics,
acoustic equipment, net sampling and oceanographic
sampling equipment and facilities. In general the proposed
sampling strategy is based on zigzag alternatively
parallel transects. This strategy would allow the data to
be processed as two independent, parallel grids. In this
framework AdriaMed is providing assistance for the
essential appraisal of the feasibility of parallel
acoustic surveys. The necessary arrangements for an
acoustic inter-calibration exercise between two different
research vessels are being made. The aim of such
inter-ship calibration is to ensure that the acoustic
system on the two vessels (Italian R/V Dallaporta
operating in the western Adriatic sector and Croatian R/V
BIOS operating in the eastern side) work correctly and to
enable data comparison to achieve a reliable estimate of
stock size for the whole area. |
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AdriaMed Events: |
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name: |
The AdriaMed Working Group on Shared Small Pelagic Fishery Resources in the Adriatic Sea |
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date
and
place: |
15-19/5/2006 -
Ancona
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Italy |
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link: |
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related
documents: |
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name: |
Acoustic Intercalibration Exercise |
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date
and
place: |
29/5-4/6/2005 -
Neretva Channel
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Adriatic Sea |
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link: |
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related
documents: |
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name: |
Working Group on Small Pelagics |
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date
and
place: |
31/6-1/7/2004 -
Bari
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Italy |
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link: |
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related
documents: |
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name: |
Workshop on Joint Echo-Ssurvey of the Small Pelagic Fish Stocks in the Central and Northern Adriatic Sea |
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date
and
place: |
21-22/5/2003 -
Ancona
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Italy |
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link: |
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related
documents: |
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name: |
Workshop on joint echo-survey of the small pelagic fish stocks in the Central and Northern Adriatic Sea |
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date
and
place: |
21-22/5/2003 -
Ancona
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Italy |
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link: |
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related
documents: |
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name: |
The first meeting of the working group established for the continuation of the Adriatic Echosurvey initiative |
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date
and
place: |
21-22/5/2003 -
Ancona
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Italy |
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link: |
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related
documents: |
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name: |
Ad Hoc Meeting on-going AdriaMed Research Programmes |
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date
and
place: |
24/4/2003 -
Split
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Croatia |
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link: |
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related
documents: |
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name: |
GFCM SAC - Sub-Committee on Stock Assessment (SCSA) - Working Group on Pelagic Fish |
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date
and
place: |
20-22/3/2002 -
Rome
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Italy |
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link: |
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related
documents: |
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name: |
Ad Hoc Working Group on Identification of Fishery Management Option for the Pomo/Jakuba Pit Critical Habitat; and on-going AdriaMed Research Programmes and forthcoming GFCM-SAC Session. |
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date
and
place: |
04/02/2002 -
Ancona
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Italy |
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link: |
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related
documents: |
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name: |
AdriaMed on-the-job Training on the Combined Echo-Survey and Environmental Parameters Monitoring Exercise in the Northern Adriatic |
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date
and
place: |
22-29/1/2002 -
Ancona
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Italy |
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link: |
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related
documents: |
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name: |
AdriaMed on-the-job Training on the Combined Echo-Survey and Environmental Parameters Monitoring Exercise in the Northern Adriatic |
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date
and
place: |
11/2001 -
Ancona
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Italy |
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link: |
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related
documents: |
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name: |
Meeting of the AdriaMed Working Groups on Shared Fishery Resources |
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date
and
place: |
17-18/10/2001 -
Fano
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Italy |
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link: |
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related
documents: |
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name: |
Ad hoc Meeting on Joint Echosurvey of the Northern and Central Adriatic Sea |
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date
and
place: |
2/10/2001 -
Split
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Croatia |
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link: |
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related
documents: |
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name: |
Joint Meeting of the AdriaMed Working Groups on Shared Demersal and Small Pelagic Fishery Resources |
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date
and
place: |
13-15/2/2001 -
Bari
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Italy |
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link: |
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related
documents: |
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name: |
1st Meeting of the Working Group on the Definition of Priority Topics Related to Small Pelagic Resources of the Adriatic Sea (Adriatic Sea Shared Stocks) |
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date
and
place: |
12-13/10/2000 -
Split
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Croatia |
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link: |
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related
documents: |
Priority Topics Related to Small Pelagic Fishery Resources of the Adriatic Sea
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Presentation at other meetings: |
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name: |
Workshop on Joint Echo-Ssurvey of the Small Pelagic Fish Stocks in the Central and Northern Adriatic Sea |
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date
and
place: |
21-22/5/2003 -
Ancona
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Italy |
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link: |
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name: |
GFCM SAC - Sub-Committee on Stock Assessment (SCSA) - Working Group on Pelagic Fish |
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date
and
place: |
20-22/3/2002 -
Rome
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Italy |
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link: |
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Training sessions: |
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name: |
Workshop on joint echo-survey of the small pelagic fish stocks in the Central and Northern Adriatic Sea |
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date
and
place: |
21-22/5/2003 -
Ancona
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Italy |
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link: |
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name: |
AdriaMed on-the-job Training on the Combined Echo-Survey and Environmental Parameters Monitoring Exercise in the Northern Adriatic |
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date
and
place: |
22-29/1/2002 -
Ancona
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Italy |
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link: |
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name: |
AdriaMed on-the-job Training on the Combined Echo-Survey and Environmental Parameters Monitoring Exercise in the Northern Adriatic |
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date
and
place: |
11/2001 -
Ancona
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Italy |
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link: |
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Publications: |
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