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Overall Objective: |
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Analysis and assessment of genetic
homogeneity/heterogeneity of the main species whose stocks
are shared in the Adriatic Sea. The specific goals of this
project was:
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to develop species-specific genetic
markers useful for the stock structure analysis (i.e.
microsatellite and mitochondrial loci);
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to define the genetic polymorphism of
Adriatic stocks;
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to identify the number and boundaries
of population units in the area investigated.
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Methodology: |
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Use of DNA molecular marker analysis to
analyse samples of seven selected demersal species
representative of the whole Adriatic Sea basin (Solea
vulgaris, Pagellus erythrinus, Merlangius
merlangus, Sepia officinalis, Loligo
vulgaris, Eledone cirrhosa, and Eledone
moschata). |
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Preliminary Results: |
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This research programme represents the
first example of a multi-species analysis of the
population’s genetic structure regarding a comprehensive
pool of internationally-relevant shared stocks.
Species-specific microsatellite
molecular markers were developed for all the seven target
species. Genetic estimators for population status (i.e.
genetic polymorphism in terms of allelic diversity,
heterozygosity and fitting of Hardy-Weinberg equilibriium)
and structure (i.e. genetic differentiation in terms of
fixation indexes and gene flow rates) were applied using
specific statistical software. The results showed high
levels of genetic polymorphism and the relevance of the
Hardy-Weinberg equilibrium in several species (Loligo
vulgaris, Nephrops norvegicus and Mullus barbatus).
Similarly, high levels of genetic homogeneity were
observed among geographical samples in most species
(Loligo vulgaris, Nephrops norvegicus, Mullus barbatus and
Solea vulgaris), clearly suggesting the occurrence of
single population units within the Adriatic shared stocks.
The low genetic polymorphism and weak genetic divergences
occasionally found (Lophius budegassa) could probably be
related to the specific bio-ecological and behavioural
features, and/or to methodological artefacts.
The genetic structure analysis for the
Adriatic stocks of several other species (Eledone
cirrhosa, E. moschata, Parapeneaus longirostris,
Merlangius merlangus, Pagellus erythrinus,
S. pilchardus
and Engraulis encrasicolus) is ongoing. Preliminary data,
not presented yet, revealed substantial genetic
homogeneity within these stocks. |
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AdriaMed Events: |
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name: |
Working Group on Shared Demersal Fishery Resources in the Adriatic Sea |
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date
and
place: |
15-16/9/2004 -
Zagreb
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Croatia |
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link: |
 |
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related
documents: |
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name: |
On-the-job training on AdriaMed demersal trawl survey data collection and processing |
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date
and
place: |
16-17/6/2004 -
Kotor
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Serbia-Montenegro |
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link: |
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related
documents: |
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name: |
Working Group on Shared Demersal Fishery Resources in the Adriatic Sea |
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date
and
place: |
12-13/3/2004 -
Fano
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Italy |
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link: |
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related
documents: |
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name: |
On the jop training on Identification of Population Units in Adriatic Sea Shared Stocks by Genetic Structure Analysis |
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date
and
place: |
3/2003 -
Ravenna
-
Italy |
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link: |
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related
documents: |
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name: |
Working Group of Shared Demersal Resources of the Adriatic Sea |
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date
and
place: |
27/2/2003 -
Rome
-
Italy |
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link: |
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related
documents: |
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name: |
On the jop training on Identification of Population Units in Adriatic Sea Shared Stocks by Genetic Structure Analysis |
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date
and
place: |
11/2002 -
Ravenna
-
Italy |
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link: |
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related
documents: |
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name: |
On the jop training on Identification of Population Units in Adriatic Sea Shared Stocks by Genetic Structure Analysis |
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date
and
place: |
3/2002 -
Piran
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Slovenia |
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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: |
On the jop training on Identification of Population Units in Adriatic Sea Shared Stocks by Genetic Structure Analysis |
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date
and
place: |
8/2001 -
Ravenna
-
Italy |
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link: |
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related
documents: |
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name: |
Methodological Training course on Identification of Population Units in Adriatic Sea Shared Stocks by Genetic Structure Analysis |
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date
and
place: |
7-12/5/2001 -
Ravenna
-
Italy |
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link: |
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related
documents: |
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name: |
On the job training course on Identification of Population Units in Adriatic Sea Shared Stocks by Genetic Structure Analysis |
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date
and
place: |
4/2001 -
Piran
-
Slovenia |
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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: |
Working Group on the Definition of Priority Topics Related to Shared Demersal Resources of the Adriatic Sea 1st Meeting, (Adriatic Sea Shared Stocks) |
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date
and
place: |
24-25/7/2000 -
Fano
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Italy |
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link: |
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related
documents: |
Priority Topics Related to Shared Demersal Fishery Resources of the Adriatic Sea
-Report of the First Meeting of the AdriaMed Working Group on Shared Demersal Resources-
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Presentation at other meetings: |
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name: |
GFCM SAC - Sub-Committee on Stock Assessment (SCSA) - Working Group on Demersal Fish |
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date
and
place: |
6-7/5/2004 -
Malaga
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Spain |
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link: |
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name: |
GFCM SAC - Sub-Committee on Stock Assessment (SCSA) - Working Group on Demersal 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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name: |
GFCM SAC - Workshop on Stock Assessment and Production of Demersal Resources in the Mediterranean |
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date
and
place: |
18-19/3/2002 -
Rome
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Italy |
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link: |
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Training sessions: |
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|
name: |
Working Group on Shared Demersal Fishery Resources in the Adriatic Sea |
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date
and
place: |
15-16/9/2004 -
Zagreb
-
Croatia |
|
|
|
|
name: |
On-the-job training on AdriaMed demersal trawl survey data collection and processing |
|
date
and
place: |
16-17/6/2004 -
Kotor
-
Serbia-Montenegro |
|
|
|
|
name: |
GFCM SAC - Sub-Committee on Stock Assessment (SCSA) - Working Group on Demersal Fish |
|
date
and
place: |
6-7/5/2004 -
Malaga
-
Spain |
|
|
|
|
name: |
Working Group on Shared Demersal Fishery Resources in the Adriatic Sea |
|
date
and
place: |
12-13/3/2004 -
Fano
-
Italy |
|
|
|
|
name: |
On the jop training on Identification of Population Units in Adriatic Sea Shared Stocks by Genetic Structure Analysis |
|
date
and
place: |
3/2003 -
Ravenna
-
Italy |
|
|
|
|
name: |
Working Group of Shared Demersal Resources of the Adriatic Sea |
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date
and
place: |
27/2/2003 -
Rome
-
Italy |
|
|
|
|
name: |
On the jop training on Identification of Population Units in Adriatic Sea Shared Stocks by Genetic Structure Analysis |
|
date
and
place: |
11/2002 -
Ravenna
-
Italy |
|
|
|
|
name: |
GFCM SAC - Sub-Committee on Stock Assessment (SCSA) - Working Group on Demersal Fish |
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date
and
place: |
20-22/3/2002 -
Rome
-
Italy |
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|
|
|
name: |
GFCM SAC - Workshop on Stock Assessment and Production of Demersal Resources in the Mediterranean |
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date
and
place: |
18-19/3/2002 -
Rome
-
Italy |
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