eman ta zabal zazu
DESCRIPTION
Eman ta zabal zazu. Eman ta zabal zazu. Universidad del País Vasco. Universidad del País Vasco. Euskal Herriko Unbertsitatea. Euskal Herriko Unbertsitatea. G. Díez, E. Díaz, L. Arregi, P. Alvarez, U. Cotano, - PowerPoint PPT PresentationTRANSCRIPT
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Eman ta zabal zazu
Euskal HerrikoUnbertsitatea
Universidaddel País Vasco
PAHs, biomarker responses, PAHs, biomarker responses, histopathology, histopathology,
biochemical analysisbiochemical analysis of larvaeof larvae andand reproductive parameters in hake and reproductive parameters in hake and
anchovy anchovy after the Prestige oil spillafter the Prestige oil spill
Eman ta zabal zazu
Euskal HerrikoUnbertsitatea
Universidaddel País Vasco
G. Díez, E. Díaz, L. Arregi, P. Alvarez, U. Cotano, H. Murua, M. Santos, A. Alday, E. Saitua, A. Orbea,
R. Werding, U. Izagirre, I. Cancio, I. Marigómez, M. P. Cajaraville
G. Díez, E. Díaz, L. Arregi, P. Alvarez, U. Cotano, H. Murua, M. Santos, A. Alday, E. Saitua, A. Orbea,
R. Werding, U. Izagirre, I. Cancio, I. Marigómez, M. P. Cajaraville
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OBJECTIVE:
-Selected species : hake (M. merluccius) and anchovy (E. encrasicolus)
To assess the effects of the Prestige oil spill in commercial fish species in the Bay of Biscay
- commercial importance in local fisheries- representative of demersal and pelagic habitats
2003
20032003
Miño-Fisterra (MF)
Peñas-Ajo(PA)
Ajo-Bidasoa(AB)
North
South
2003-05
2003-05
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Selected tools:
5.- analysis of historical series of fecundity parameters
4.- Biochemical and nucleic acid analysis, growth rates and K index
3.- Liver and gonad histopathology
1.- Chemical analysis of PAHs concentration in flesh
2.- Exposure and effect biomarkers
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PPAHs average concentration (g/kg dry weight) in
flesh of anchovy (61 samples) and hake (107 samples)
1. Chemical analysis of PAH concentration in flesh
Gas Chromatography/Mass Spectrometry, analysis of 24 PAHs
anchovyaverage HAPs
0,1Chrysene0,5Fluorene0,5Anthracene1,41-methyl phenanthrene3,62-methyl naphthalene4,11-methyl naphthalene4,5Fluoranthene9,2Naphthalene11,0Phenanthrene16,0Pyrene
Average: 51.1 g/kg dry weight
hake
0,1Acenaphthylene0,8Anthracene0,82,6-dimethyl naphthalene1,7Fluoranthene2,1Phenanthrene2,2Pyrene3,0Biphenyl4,22-methyl naphthalene5,71-methyl naphthalene6,3Naphthalene
Average: 27.2 g/kg dry weight
average HAPs
2004
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PCorrelation coefficient PAHs average concentration in
flesh hake and length (n:107)
1. Chemical analysis of PAH concentration in flesh
Samples of 2005 year in process
flesh hake
y = - 0,9188x + 65,762R2 = 0,0813
correlation coefficient : - 0,285135P= 0,0029
020406080
100120140160180
20 25 30 35 40 45 50 55 60length (cm)
PAH
s ug
/kg
dry
wei
ght
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BIOMARKERS AS EARLY WARNING SIGNALS
2.- Exposure and effect biomarkers
*No previous data in selected especies
EXPOSURE BIOMARKERS
-EROD activity
-peroxisome proliferation: (Vvp and AOX activity)
EFFECT BIOMARKER
-Lysosomal membrane stability test
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BEQUALM intercalibration programme- EROD activity in cod liver
- Protein concentration in cod liver and muscle
CYP1A1 induction: 7-ethoxyresorufin O-deethylase (EROD) activity
2.- Exposure and effect biomarkers
anchovyEROD activity in S9 fraction
0
1
2
3
Male North Male South Female North Female South
pmol
reso
rufin
/m
in/m
g pr
ot
2004
2005
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Peroxisome proliferation
x100
2.- Exposure and effect biomarkers
Peroxisomes in anchovy
Male North
Male South
Female North
Female South
Palmitoyl CoA-oxidase Activity
0
0,5
1
1,5
2
AO
X (m
U/m
g pr
ot)
*Volume Density of Peroxisomes
0
0,001
0,002
0,003
0,004
VvP
(µm3 /
µm3 )
2004
2005
**
DAB
anchovy
anchovy
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Lysosomal membrane stability2.- Exposure and effect biomarkers
Hake Anchovy
β-Gus (x 40)
0
2
4
6
8
10
Female South Male South Female North Male North
Lp (m
in)
2004
2005
acid phosphataseanchovy
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Hake liver:Nematodes
Melanomacrophages
Inflammation
Nuclear polymorphism
3.- Liver and gonad histopathology
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0%0%(n=23)(n=23)
0%0%(n=28)(n=28)
3%3%(n=68)(n=68)
Necrotic FociNecrotic Foci
30.4%30.4%
(n=23)(n=23)
50%50%(n=28)(n=28)
16.2%16.2%(n=68)(n=68)
HNPHNP
4.3%4.3%(n=23)(n=23)
17.9%17.9%(n=28)(n=28)
14.7%14.7%(n=68)(n=68)
IRLAIRLA
47.8%47.8%(n=23)(n=23)
25%25%(n=28)(n=28)
48.5%48.5%(n=68)(n=68)
MMCsMMCs
4.3%4.3%(n=23)(n=23)
7.1%7.1%(n=28)(n=28)
13.2%13.2%(n=68)(n=68)
Nematodes (microscopic)Nematodes (microscopic)
37.5%37.5%(n=24)(n=24)
10.7%10.7% (n=28)(n=28)
40.2% 40.2% (n=102)(n=102)
Nematodes (macroscopic)Nematodes (macroscopic)
ABABPA PA MFMF
MMCs: melanomacrophage centersIRLA: inflammatory response with lymphocyte accumulations HNP: hepatocellular nuclear polymorphism
3.- Liver and gonad histopathology
Hake liver: 20032003
Different colour indicates p<0.05 according to 2 test
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Nematodes
MMCs and coccideans Inflammation
3.- Liver and gonad histopathology
Anchovy liver:Nuclear polymorphism
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10.2% (n=59)10.2% (n=59)22% (n=50)22% (n=50)CoccideansCoccideans
0% (n=59)0% (n=59)8% (n=50)8% (n=50)Necrotic FociNecrotic Foci
13.5% (n=59)13.5% (n=59)16% (n=50)16% (n=50)HNPHNP
1.7% (n=59)1.7% (n=59)10% (n=50)10% (n=50)IRLAIRLA
11.9% (n=59)11.9% (n=59)52% (n=50)52% (n=50)MMCsMMCs
0% (n=59)0% (n=59)46% (n=50)46% (n=50)Nematodes Nematodes (microscopic)(microscopic)
2004200420032003
MMCs: melanomacrophage centersIRLA: inflammatory response with lymphocyte accumulations HNP: hepatocellular nuclear polymorphism
3.- Liver and gonad histopathology
Anchovy liver:
p<0.05p<0.05
p<0.05p<0.05
--
p<0.05p<0.05
p<0.05p<0.05
p<0.05p<0.05
SOUTHSOUTH
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3.- Liver and gonad histopathology
Degeneration of immature oocytes
Alveolo cortical atretic oocytes
hake gonad histopathology (prevalence of atretic oocytes)
vitellogenic atretic oocytes
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3.- Liver and gonad histopathology
anchovy gonad histopathology (prevalence of atretic oocytes)
Atretic oocytes
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3.- Liver and gonad histopathology
1,48Previtellogenic primary growth (n=68)2,25Cortical alveoli (n= 18)2,50Vitellogenic (n=10)
degenerated oocytes gonadal maturity (n=96)average of inmaturehake
stereological methods (Weibel lattice M168), 30 individuals, 20 fields, x 20
Checking of gonad histological
samples since 1996
Volume Density of atretic oocytes (2004)
0,27%4,8%
9,2%7,2%
0%
5%
10%
15%
20%
25%
30%
hake total hake Vitello. hake Corticalalv.
anchovy total
gonadal development
DV
(%)
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- Somatic conditionK condition index <5 6-10 10-15 15-20 > 202000 0.012 0.010 0.015 0.019 0.0202003 0.016 0.014 0.018 0.020 0.023t student (p) 0.043 0.003 0.021 0.547 0.127
days
- RNA/DNA (average) R/D2000=5R/D2003=4,7
No significant differences (ANOVA p>0,05)
4.- Biochemical and nucleic acid analysis, growth rates and K index in anchovy larvae
- Growth rate
Age (days)
y = 0.5456x + 3.7933R2 = 0.8653
y = 0.6517x + 2.8199R2 = 0.8731
0.0
5.0
10.0
15.0
20.0
25.0
0 5 10 15 20 25 30
SL (m
m)
2000 2003ANCOVA, p> 0,05
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% B
iom
olec
ule
1,6 1,8 2 2,2 2,4 2,6 2,80
10
20
30
40
50
60
70
80
90
100
1,6 1,8 2 2,2 2,4 2,6 2,80
10
2030
40
50
6070
80
90
100
Proteins % = 23,44 + 12,754 * ln(length+1); R^2 = ,056
Carbohydrates % = 16,715 - 3,598 * ln(length+1); R^2 = ,04
Lipids % = 59,845 - 9,156 * ln(length+1); R^2 = ,025
Proteins % = -46,628 + 47,024 * ln(length+1); R^2 = ,326
Carbohydrates % = 54,574 - 19,323 * ln(length+1); R^2 = ,17
Lipids % = 92,054 - 27,701 * ln(length+1); R^2 = ,164
4.- Biochemical and nucleic acid analysis, growth rates and K index in anchovy larvae
BEFORE THE SPILL (2000,2001)
n=118, p<.0001
% B
iom
olec
ule
AFTER THE SPILL (2003,2004)
n=47, p>.05Ln (legth mm+1)
Ln (legth mm+1)
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Anchovy Batch Fecundity: (total number of eggs released in a batch)Spawning fraction (%): percentage of spawning mature females
-nothing extraordinary after the Prestige oil Spill
5.- Fecundity analysis
anchovy Batch fecundity & Spawning fraction
0
5.000
10.000
15.000
20.000
25.000
1987 1988 1989 1990 1991 1992 1994 1995 1996 1997 1998 2000 2001 2002 2003 2004
batc
h fe
cund
ity
0
5
10
15
20
25
30
35
Spaw
ning
frac
tion
Batch fecundity Spawning fraction (%)
Prestige spill
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Hake Relative Batch Fecundity(total number of hydrated oocytes/female gutted weight)
5.- Fecundity analysis
-nothing extraordinary after the Prestige oil Spill
hake Relative Batch fecundity
139121123
165164
132
0255075
100125150175200225250
1996 1997 1998 1999 2000 2001 2002 2003 2004
Rela
tive
batc
h fe
cund
ity (e
ggs/
g)
Prestigespill
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Summary-1-In 2004 the concentration of 24 PAHs in flesh was higher in anchovy than in hake. Negative correlation between PAHs concentration and length in hake.
-There were no differences in anchovy between years 2004 and 2005 in EROD activity and in LP. The volume density of Peroxisomas and AOX activity was decreased from 2004 to 2005. Could indicate recovery??
- Prevalence of histopathologies in anchovy decreased from 2003 to 2004, indicating a possible recovery of their health state. High prevalence (>40% in some cases) of parasitic infestations, melanomacrophages, inflammatory reactions, necrotic foci and hepatocellular nuclear polymorphism in hake.
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-In anchovy larvae, no significant differences between 2000 and 2003 in growth rate and nucleic acid analysis have been found. The somatic index differed only in the younger larvae. Different pattern of biomolecular composition before and after spill
- There are no apparent differences in the annual fecundity for both species. Statistical comparative test among years and more biological parameters (size at maturity, duration of reproductive season…) are necessary to decipher whether there are differences in the reproductive capacity of populations.
Summary-2- The stereological preliminary results in 2004 show a 7.2% of atretic oocytes in hake and 0,26% in anchovy. It is necessary to check the historical series in order to test if there are significant differences between years.
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