Fishery Resources: Combined Echo . . . . .

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Fishery Shared Resources --> Combined echo-survey and environmental parameters monitoring exercise in the northern part of the Adriatic Sea

Overall Objective:


	AdriaMed Events
	Presentation at other meetings
	Training sessions
	Publications

Estimate of the small pelagic fish biomass and distribution pattern in the Adriatic Sea and the relationship with environmental variables.

Methodology:

Combined acoustic and biological sampling survey of the Northern Adriatic Sea with associated environmental parameters monitoring.

Preliminary Results:

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.

AdriaMed Events:

name:	The AdriaMed Working Group on Shared Small Pelagic Fishery Resources in the Adriatic Sea
date and place:	17/06/2008 - Kotor - Montenegro
link:
related documents:

name:	The AdriaMed Working Group on Shared Small Pelagic Fishery Resources in the Adriatic Sea
date and place:	15-19/5/2006 - Ancona - Italy
link:
related documents:

name:	Acoustic Intercalibration Exercise
date and place:	29/5-4/6/2005 - Neretva Channel - Adriatic Sea
link:
related documents:

name:	Working Group on Small Pelagics
date and place:	31/6-1/7/2004 - Bari - Italy
link:
related documents:

name:	Workshop on joint echo-survey of the small pelagic fish stocks in the Central and Northern Adriatic Sea
date and place:	21-22/5/2003 - Ancona - Italy
link:
related documents:

name:	Workshop on Joint Echo-Ssurvey of the Small Pelagic Fish Stocks in the Central and Northern Adriatic Sea
date and place:	21-22/5/2003 - Ancona - Italy
link:
related documents:

name:	The first meeting of the working group established for the continuation of the Adriatic Echosurvey initiative
date and place:	21-22/5/2003 - Ancona - Italy
link:
related documents:

name:	Ad Hoc Meeting on-going AdriaMed Research Programmes
date and place:	24/4/2003 - Split - Croatia
link:
related documents:

name:	GFCM SAC - Sub-Committee on Stock Assessment (SCSA) - Working Group on Pelagic Fish
date and place:	20-22/3/2002 - Rome - Italy
link:
related documents:

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.
date and place:	04/02/2002 - Ancona - Italy
link:
related documents:

name:	AdriaMed on-the-job Training on the Combined Echo-Survey and Environmental Parameters Monitoring Exercise in the Northern Adriatic
date and place:	22-29/1/2002 - Ancona - Italy
link:
related documents:

name:	AdriaMed on-the-job Training on the Combined Echo-Survey and Environmental Parameters Monitoring Exercise in the Northern Adriatic
date and place:	11/2001 - Ancona - Italy
link:
related documents:

name:	Meeting of the AdriaMed Working Groups on Shared Fishery Resources
date and place:	17-18/10/2001 - Fano - Italy
link:
related documents:

name:	Ad hoc Meeting on Joint Echosurvey of the Northern and Central Adriatic Sea
date and place:	2/10/2001 - Split - Croatia
link:
related documents:

name:	Joint Meeting of the AdriaMed Working Groups on Shared Demersal and Small Pelagic Fishery Resources
date and place:	13-15/2/2001 - Bari - Italy
link:
related documents:

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)
date and place:	12-13/10/2000 - Split - Croatia
link:
related documents:	Priority Topics Related to Small Pelagic Fishery Resources of the Adriatic Sea

Presentation at other meetings:

name:	Workshop on Joint Echo-Ssurvey of the Small Pelagic Fish Stocks in the Central and Northern Adriatic Sea
date and place:	21-22/5/2003 - Ancona - Italy
link:

name:	GFCM SAC - Sub-Committee on Stock Assessment (SCSA) - Working Group on Pelagic Fish
date and place:	20-22/3/2002 - Rome - Italy
link:

Training sessions:

name:	Workshop on joint echo-survey of the small pelagic fish stocks in the Central and Northern Adriatic Sea
date and place:	21-22/5/2003 - Ancona - Italy
link:

name:	AdriaMed on-the-job Training on the Combined Echo-Survey and Environmental Parameters Monitoring Exercise in the Northern Adriatic
date and place:	22-29/1/2002 - Ancona - Italy
link:

name:	AdriaMed on-the-job Training on the Combined Echo-Survey and Environmental Parameters Monitoring Exercise in the Northern Adriatic
date and place:	11/2001 - Ancona - Italy
link:

Publications:

Mannini, P. - Massa, F. - Milone, N., 2001. Priority Topics Related to Small Pelagic Fishery Resources of the Adriatic Sea. GCP/RER/010/ITA/TD-03 (AdriaMed Technical Documents n°3): 92 pp.

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