SAC GFCM

Assesment form to the G.F.C.M.
SCSA. Working Group on the
Small Pelagic
Roma, 26-30 September 2005
Sardine (Sardina pilchardus) Stock Assessment in the GFCM
Geographical Sub-Area 01. Northern Alboran Sea
A Giráldez, P Torres, L Quintanilla, and J Baro
IEO- Centro Oceanográfico de Málaga, P.O. Box 285, 29640
Fuengirola (Spain)
SAC GFCM.
Subcommittee of Stock Assessment
Date
11/09/2006
Species Scientific
name
Data source
Geographical
limits
Sheet #0
Basic data on the assessment
Person in charge A. Giráldez and J. Baro
Code
Sardina Pilchardus (Walbaum, 1792)
Species common
name
Northern Alboran
GFCM geographical sub-area 01
Description of the analysis
Type of data Purse Seine Fleet, Catch and Effort.
Size composition of purse seine
catches
Biomass estimations.
Method of
Acoustics.
assessment
Sheets filled out
B
P1
P2a
X
X
X
Assessment form
P2b
X
G
X
A1
A2
A3
Sardine
Period of
time
1990-2005
Data source
Official Statistics (SGPMMinistry of Fisheries).
IEO Sampling Network.
Acoustic surveys.
Sonar Data Ecoview.
Software
used
Y
D
Z
X
C
AS
X
Comments, bibliography, etc.
Abad,R., A.Giráldez, and J.Crespo. 1987. Relación entre caladeros tradicionales de sardina (Sardina
pilchardus) y resultados de campañas de bioacústica en la Región Surmediterránea española. FAO
Rapp. Pêches. 395:1-9.
Abad,R. and A.Giráldez. 1990. Descripción de la pesca de cerco en la Región Surmediterránea. Inf. Téc.
Inst. Esp. Oceanogr. 86:48.
Abad,R., A.Giráldez, and I.De Carranza. 1991. Pesquería de cerco en la Región Surmediterránea. FAO
Rapp. Pêches. 447:192-200.
Abad,R., A.Giráldez, and I.De Carranza. 1991. Series históricas de desembarcos en el Mediterráneo
español. FAO Rapp. Pêches. 447:171-191.
Abad,R., J.Miquel, and M.Millán. 1991. Resultados de la campaña de evaluación acústica ECOMED 90.
Inf. Téc. Inst. Esp. Oceanogr. 104:63.
Abad,R., J.Miquel, M.Millán, and M.Iglesias. 1992. Resultados de la campaña de evaluación acústica
ECOMED91. Inf. Téc. Inst. Esp. Oceanogr. 131:77.
Abad,R. and I.Franco. 1995. Análisis de las comunidades de peces pelágicos en la plataforma continental
del Mediterráneo occidental. Bol. Inst. Esp. Oceanogr. 11 (2):161-174.
Abad,R. and A.Giráldez. 1996. Reproducción de la sardina (Sardina pilchardus) y el boquerón (Engraulis
encrasicolus) en la Región Surmediterránea española (Mar de Alborán). FAO Rapp. Pêches.
537:195-198.
Abad, R. y A. Giráldez.- 1996. Dinámica y evolución temporal de la flota de cerco de la R. Surmediterránea.
1980-1995. Workshop: Fleets Dynamics. Concerted Action on Fisheries Research in the Western
Mediterranean. Interdisciplinary approach.
Abad,R. and A.Giráldez. 1997. La pesquería de cerco en la Región Surmediterránea (1991-1995). Datos y
Resúmenes Inst Esp Oceanogr 4:41.
Abad, R. y A. Giráldez.- 2000. Acoustic estimation of abundance of sardine, anchovy and sardinelle in
the NW Mediterranean. SAC (GFCM) Working Group of Small Pelagics. (Fuengirola ,Spain,
3/2000).
Abad, R. A. Giráldez Y J. Miquel.- 2001. Estimación de la abundancia de pequeños pelágicos en la
plataforma de la isla de Alborán (SW mar Mediterráneo) obtenidas por métodos acústicos. Actas
de las I Jornadas Internacionales Sobre Reservas Marinas. Ed MAPyA.
Ferrandiz,E., S.Cañizares, R.Abad, and M.Báez-hidalgo. 1998. Analisis of sardine (Sardina pilchardus)
and anchovy (Engraulis encrasicholus) catches in the Spanish Mediterranean. Cahier Options
Méditerranéennes. CIHEAM. 35:229-249.
Giráldez,A. and R.Abad. 1991. La pesquería de cerco en la Región Surmediterránea en 1989-1990. Inf.
Téc. Inst. Esp. Oceanogr. 105:31.
Giráldez, A. y R. Abad.- 1998. The present state of the spaninsh mediterranean small pelagic fisheries.
GFCM. Scientific Advisory Committee. Roma.
Giráldez,A. and R.Abad. 2000. Serie histórica de capturas de los pequeños pelágicos en el Mediterráneo
español (1945-1997) y capturas, esfuerzos y flota de cerco de la Región Surmediterránea. Datos y
Resúmenes Inst Esp Oceanogr 13:1-26.
Giráldez, A. y R. Abad.- 2000. Historical series of small pelagic catches in the Spanish Mediterranean
coasts. SAC (GFCM) Working Group of Small Pelagics (Fuengirola ,Spain, 3/2000).
Giráldez, A. y R. Abad.- 2000. The small pelagic fishery in the South-Mediterranean Region. SAC
(GFCM) Working Group of Small Pelagics. Fuengirola ,Spain, 3/2000.
Giraldez A.. 2001. The length at first maturity of anchovy Engraulis encrasicolus in the Mediterranean. .
Working Paper SAC (GFCM)
Giráldez A. & F. Alemany . 2002. Echo-Survey estimations of anchovy, sardine, gilt sardine, bogue and
horse mackerel populations in the NW Mediterranean Sea (from Creus Cape to La Nao Cape).
Working Paper WG SP
Giráldez A. & F. Alemany. 2002. The small pelagic fisheries in the South-Mediterranean Region
(Western Mediterranean Sea): Past and present state. GFCM-SAC-Subcommittee of Stock
Assesment Working Group on Small Pelagic especies Rome, Italy, 20-22 March, 2002.
SAC GFCM.
Subcommittee of Stock Assessment
Assessment form
Sheet B
Biology of the species
Code
Biology
Somatic magnitude measured (LH, LC, etc) Total Length
Units cm
Sex Unsexed
Maximum size observed
22.6
Reproduction season
Autumn-Winter
Onset of maturity size
Reproduction areas
All the Coast
Recruitment size
Nursery areas
Bays
Parameters used (state units and information sources)
sex males
females
total
Growth model
Von Bertalanffy
Data source
Otoliths Reading (Quintanilla et al 2006, pers. comm..)
22.75 cm
L∞ (growth)
K (growth)
0.36 year-1
t0 (growth)
-1.87 year
length-weight
Biological studies in Malaga and Estepona ports
relationship
(Quintanilla et al 2005, pers. comm.)
a (length-weight)
0.00208
b (length-weight)
3.50417
sex ratio
50.5
M
Comments
SAC GFCM.
Subcommittee of Stock Assessment
Assessment form
Sheet P1
General information about the fishery
Code
Page
Data source
Size composition of purse seine catches: IEO
Landings : SGPM and IEO
Fleet : SGPM (Ministry of Fisheries)
Data aggregation (by year, average By Year
figures between years, etc.)
Fleet and catches (please state units)
gear
Fleet
Catch (tons)
(nº of boats)
Purse seine
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
Legal minimum size
Comments:
180
194
187
184
168
167
160
149
11 cm
(species assessed)
7909
11733
12754
7462
6117
5418
4293
3672
4469
5639
9353
7456
5092
8510
4092
6453
year(s)
other species
caught (tons)
4698
4238
5961
9687
11402
15871
13587
7996
6741
3846
1990-2005
discards
discards
(species assessed)
(other species
caught)
SAC GFCM.
Subcommittee of Stock Assessment
Assessment form
Sheet P2a
Fishery by gear
Code
Page
Structure by size
SARDINE. Surmediterránea Region 2005
10
9
Frequency (%)
8
7
6
5
4
3
2
1
0
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Length (cm)
Average length frequency distribution (1/2 cm; total length) of purse seine landings in the geographical
sub-area 01 (Northern Alboran Sea) during 2005. Size composition have been obtained from monthly
length sampling of purse seine landings
SAC GFCM.
Subcommittee of Stock Assessment
Assessment form
Fishery by gear
Code
Page
Data source
IEO
Regulations in force and degree of observance of regulations
- Minimum legal size of 11 cm
- No fishing on Saturday and Sunday
- Fleet capacity (total fleet GRT and gears size)
- Temporal closures in some region
Accompanying species
Engraulis encrasicolus
Sardinella aurita
Trachurus spp.
Scomber spp.
Boops boops
Scomberesox saurus
Auxis rocheii
Sarda sarda
Sheet P2b
gear
Purse seine
SAC GFCM.
Subcommittee of Stock Assessment
Assessment form
Sheet G
Indirect methods. Global model
Code
Analysis #
Data source
IEO
Gear Purse seine
Model characteristics
Type of model
Software
Fitting criterion
Bibliographi-cal source
Data Surmediterranea Region (Gata Cape to Gibraltar Strait)
Year
1990
1991
1992
1993
1994
Catch
6439
9599
10826
5782
5220
Effort
CPUE
921
1328
1308
1095
Year
Catch
Effort
CPUE
1995
4316
1996
3589
1997
3263
1998
3982
756
612
726
839
1999
5146
2000
8697
2001
6817
2002
5031
2003
8435
2004
4012
2005
6070
1193
1508
1156
906
1064
828
1252
Adjustment
RMS
Results
Carrying capacity
Growth rate
Catchability
MSY
EMSY
E0.1
Ecurrent
a
b
TACMSY
TAC0.1
Comments
SARDINE. Surmediterránea Region
2000
12000
1800
Landings (t)
10000
1600
1400
8000
6000
1200
Landings
1000
CPUE
800
4000
600
400
2000
200
0
0
1990
1992
1994
1996 1998
2000
2002
2004
Year
Catches and efforts data 1990-2001 correspond to Málaga and Estepona ports in the South
Mediterranean. Effort unit considered was effective fishing nights by species, estimated from IEO
sampling network.
The landings and cpue present a strong annual fluctuation with a increase in their both in 2005 year.
SAC GFCM.
Subcommittee of Stock Assessment
Assessment form
Objectives and recommendations
Code
Page
Management objectives
Management recommendations
Area closures
Temporal closures
Effort limitation
Minimum size
Technical steps
concerning gear
Quotas
Market
Fishing control
Data collection
Do not increase the fishing effort.
Sheet Z
SAC GFCM.
Subcommittee of Stock Assessment
Assessment form
Sheet AS
Direct methods: acoustics
Code
Page
Cruise
ECOMED
Total area (km2)
15029
Objective (in general)
Target species
Echosounder
Sampling strategy
ESDU
Pulse duration
Echogramm identification
Samples (gear used)
Biological data obtained
B/O
Date
Cornide de Saavedra
11-12/2005
Estimation of abundance index
Sardine, anchovy, gilt sardine, T. mediterraneus, boge and Scomber
japonicus
EK 500
Parallel transect and perpendicular to the coast
1 mn
1 msg
fishing
Pelagic trawl
Size-weight relationship, growth parameter
Results obtained. (Biomass in
metric tons, amount of fish etc.)
Biomass in metric tons and abundance in number of individuals by
species and sector
Comments
Acoustic sampling performed during daytime, identificative hauls made at night in previously identified
points
RESULTS (Sardine Biomass in tons)
Zone
2003
2004
2005
Alborán (Surmediterránea R.)
7142*
46872
74521
Comments
* Only from Gata Cape to Fuengirola.
It was not possible to evaluate from Fuengirola to the Gibraltar Strait in 2003 year.
The period in which the surveys were carried out corresponds to the beginning of the species reproduction
season (November – December).
The estimated biomass in 2005 is higher 2004.