DESCRIPTION OF FIRST ESCAPE OF GREATER AMBERJACK (Seriola Dumerili, Risso 1810) IN THE MEDITERRANEAN SEA BY MEANS OF GENETICS, GEOMETRIC MORPHOMETRICS AND SOCIAL MEDIA.

DESCRIPTION OF FIRST ESCAPE OF GREATER AMBERJACK (Seriola
Dumerili, Risso 1810) IN THE MEDITERRANEAN SEA BY MEANS OF
GENETICS, GEOMETRIC MORPHOMETRICS AND SOCIAL MEDIA.
D. Izquierdo-Gomez, I. T
alijančić, I. Žužul,T. Segvić-Bubić

DESCRIPTION OF FIRST ESCAPE OF GREATER AMBERJACK (Seriola Dumerili, Risso 1810) IN
THE MEDITERRANEAN SEA BY MEANS OF GENETICS, GEOMETRIC MORPHOMETRICS
AND SOCIAL MEDIA.
JANUARY 2020
17 months back
17
OCTOBER 2021
7
david.izquierdo-gomez@univ-pau.fr

Iberian
Peninsula
AND SOCIAL MEDIA.

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Hm0 (m)
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photo: OCU

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Argyrosomus regius

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Thunnys thynnus
Argyrosomus regius

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Argyrosomus regius
Thunnys thynnus
Gilthead seabream

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Argyrosomus regius
Thunnys thynnus
Gilthead seabream
Dicentarchus labrax

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Fish production in Europe (2019)
Value
Greece
Spain
Italy
France
Poland
Denmark
…
Volume (Tm)

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Value
Greece
Spain
Italy
France
Poland
Denmark
…
Volume (Tm)
meagre
turbot
Gilthead
Seabass
trout
Fish produced in Spain (t)

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Value
Greece
Spain
Italy
France
Poland
Denmark
…
Volume (Tm)
⋍60%
meagre
Gilthead
Seabass

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Value
Greece
Spain
Italy
France
Poland
Denmark
…
Volume (Tm)
10 000 - 15 000 t
of fish lost due to
Gloria storm
55-60%
produced in
C.Valenciana
and Murcia
meagre
Gilthead
Seabass

AND SOCIAL MEDIA.
Between 60-70 % of the marine fish
production of Murcia and Comunidad
Valenciana was lost due to Gloria Storm

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?

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• Not streamed lined contours
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• More dark green and less yellowish (lemon fish)
• Skin damage (scale loss, small injuries)

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MPA Cabo de Palos (Murcia) Mallorca (Balearic islands)
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APROMAR 2021: Spanish Association of Marine Producers
Seriola dumerili
report 2021
18tonnes
in2020
Yellowtail amberjack
Calpe
La Vila
San Pedro
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orthogonal photo
morphometrics
pectoral fin clip
genetics
Santa Pola
(Spain)
14.5 € / Kg

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Santa Pola
landing port
(Spain)
morphometrics genetics
Split
(Croatia)
Santa Pola
(Spain)
sampling period February 2020 – July 2020

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Santa Pola
landing port
(Spain)
Split
(Croatia)
Santa Pola
(Spain)
Wild* (2-4 kg)
Wild (<1kg)
Farmed (Andromeda* 3-4 kg 2017)
Escaped* (2-4 kg)
Wild (2-4 kg | 2013)
Wild (2-4 kg)
Wild (<1kg)
Farmed (Chromaris 900g 2018 & 2019)
Wild (2-4 kg | 2013)

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Santa Pola
landing port
(Spain)
Split
(Croatia)
Santa Pola
(Spain)
Wild* (2-4 kg)
Wild (<1kg)
Farmed (Andromeda* 3-4 kg 2017)
Escaped* (2-4 kg)
Wild (2-4 kg | 2013)
Wild (2-4 kg)
Wild (<1kg)
Farmed (Chromaris 900g 2018 & 2019)
Wild (2-4 kg | 2013)
n = 492

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MORPHOMETRIC ANALYSES
deviation from the mean shape
MorphoJ
Multivariate analyses
(canonical variates …)

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Wild
morphotype
(CVA1)
Farmed
morphotype
(CVA1)
balearic escaped
balearic wild
adriatic wild
balearic farmed
wild farmed
adriatic farmed

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balearic escaped
balearic wild
adriatic wild
ADF ADW BAE BAF BAW Total
Adr.Farm
30
(100%)
0 0 0 0 30
Adr.Wild
0 57
(89 %)
2 1 4 64
Bal.Escaped
1
2
37
(80.4%)
4 2 46
Bal.Farm
1
2 2
24
(82.8%)
0 29
Bal.Wild
4
18 6 1
54
(65 %)
83
balearic farmed
wild farmed
adriatic farmed
Significant effect of size on shape = 5% (p<0.01)
Canonical variate analysis with displayed Overall jack-kniffed % correctly classified (80.16 %).

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Sdu41
Sdu46
Sdu44
Sdu39
Sdu8
Sdu21
Sdu5
Sdu4
Sdu22
Sdu27
Sdu7
MULTIPLEX PCR 1
Microsatellites
Sdu31
Sdu36
Sdu19
Sdu10
MULTIPLEX PCR 2
2016
CAPILAR
ELECTROPHORESIS
GENOTYPING
GENETIC ANALYSES

GENETIC ANALYSES
Population structure based od Structure analyses of Greater amberjack genotypes at neutral microsatellite loci.
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2013
Wild
2020
Wild
2020
Wild
2020
Escaped
2017gen
Farmed
2013
Wild
2018
Wild
2020
Wild
2019gen
Farmed
2020 gen
Farmed
BALEARIC SEA (Spain) ADRIATIC SEA (Croatia)
WILD: • All wild populations show similar structure (low structure Western/Eastern Med)
• Escaped fish (Spain) structure not consistent

GENETIC ANALYSES
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2013
Wild
2020
Wild
2020
Wild
2020
Escaped
2017gen
Farmed
2013
Wild
2018
Wild
2020
Wild
2019gen
Farmed
2020 gen
Farmed
visual misidentification wild/escaped
(feralization???)

2013
Wild
2020
Wild
2020
Wild
2020
Escaped
2017gen
Farmed
2013
Wild
2018
Wild
2020
Wild
2019gen
Farmed
2020 gen
Farmed
GENETIC ANALYSES
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(feralization???)

2013
Wild
2020
Wild
2020
Wild
2020
Escaped
2017gen
Farmed
2013
Wild
2018
Wild
2020
Wild
2019gen
Farmed
2020 gen
Farmed
GENETIC ANALYSES
AND SOCIAL MEDIA.
FARM: • All farmed populations were assigned to different groups (same broodstock)
• The reared farm in Croatia has no consistent genetic profiles over time
(feralization???)

2013
Wild
2020
Wild
2020
Wild
2020
Escaped
2017gen
Farmed
2013
Wild
2018
Wild
2020
Wild
2019gen
Farmed
2020 gen
Farmed
GENETIC ANALYSES
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FARM: • All farmed populations were assigned to different groups (same broodstock)
• The reared farm in Croatia has no consistent genetic profiles over time • Low allelic richness
• low effective population size
(limited broodstock)
(feralization???)

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SPATIAL DISTRIBUTION Population structure based od Structure analyses of Greater amberjack genotypes at neutral microsatellite loci.
2013
Wild
2020
Wild
2020
Wild
2020
Escaped
2017gen
Farmed
2013 2018 2020 2019gen 2020 gen
Wild Wild Wild Farmed Farmed
BALEARIC SEA(Spain) ADRIATIC SEA (Croatia)
Calpe
(Sampled farm)
San Pedro
(not sampled farm) Calpe harbour
Mazarron
harbour
San Juan
de los
Terreros
300 km
Calo de Palos Marine Reserve
Santa Pola
harbour
Benidorm island
125 km 110 km
• min. dispersion distance = 110 km
• both towards the north and the south
Atlantic
Ocean

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• Not streamed lined contours
• More dark green and less yellowish (lemon fish)
• Skin damage
• Distributed in « deep » areas (20m - 50m)
SOCIAL MEDIA
kayak fishing fishing boat spear-fishing
Escaped European seabass and Gilthead seabream aggregate in the shore
and large densities of recreational fishermen occur.

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genetic diversity and int. wild populations
conflict of interests aquaculture/fisheries
socio-economic influence of escaped fish
disease transmission
antibiotics and public health
predation on fisheries resources
fight for resources with other species (habitat and preys)
interactions with high valued species
interactions with marine protected areas (MPAs)

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Today 16:30
Valero-Rodriguez

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Today 16:30
Valero-Rodriguez
telemetry / diet
studies

Thank you
david.izquierdo@
ua.es

DESCRIPTION OF FIRST ESCAPE OF GREATER AMBERJACK (Seriola Dumerili, Risso 1810) IN THE MEDITERRANEAN SEA BY MEANS OF GENETICS, GEOMETRIC MORPHOMETRICS AND SOCIAL MEDIA.

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DESCRIPTION OF FIRST ESCAPE OF GREATER AMBERJACK (Seriola Dumerili, Risso 1810) IN THE MEDITERRANEAN SEA BY MEANS OF GENETICS, GEOMETRIC MORPHOMETRICS AND SOCIAL MEDIA.