(FROM GHENO AND POINSARD, 1969)
(a) Sardinella maderensis (in %)
|
Age
|
Month |
Total |
|||||||
|
1 |
2 |
3 |
4 |
5 |
6 |
7 |
|||
|
Year 1966 |
|
|
|
|
|
|
|
|
|
|
|
June |
52.8 |
41.4 |
5.5 |
0 |
0 |
0 |
0 |
100 |
|
|
July |
36.7 |
16.6 |
21.4 |
13.0 |
10.9 |
1.5 |
0 |
100 |
|
|
August |
0 |
11.1 |
34.7 |
21.1 |
22.3 |
2.8 |
0 |
100 |
|
|
September |
72.3 |
23.1 |
4.1 |
0.4 |
0 |
0 |
0 |
100 |
|
Year 1967 |
|
|
|
|
|
|
|
|
|
|
|
June |
7.4 |
60.5 |
7.4 |
10.2 |
11.7 |
2.9 |
0 |
100 |
|
|
July |
0 |
91.9 |
5.6 |
2.8 |
0 |
0 |
0 |
100 |
|
|
August |
8.1 |
85.0 |
4.0 |
2.0 |
0 |
0 |
0 |
100 |
|
|
September |
1.0 |
83.7 |
7.0 |
4.0 |
3.0 |
1.2 |
0 |
100 |
|
Year 1968 |
|
|
|
|
|
|
|
|
|
|
|
June |
2.3 |
76.4 |
0.3 |
3.4 |
4.3 |
3.2 |
0.3 |
100 |
|
|
July |
20.9 |
50.8 |
15.6 |
2.6 |
4.8 |
2.7 |
0.4 |
100 |
|
|
August |
23.3 |
64.1 |
8.9 |
2.1 |
0 |
0 |
0.7 |
100 |
|
|
September |
4.9 |
72.8 |
19.3 |
0.7 |
0.3 |
0.7 |
0 |
100 |
|
Age group
|
Year |
|||||
|
I |
II |
III |
IV |
V |
VI |
|
|
1966 |
260 |
147 |
2 079 |
1 010 |
13 |
14 |
|
1967 |
170 |
264 |
63 |
270 |
97 |
12 |
|
1968 |
797 |
267 |
78 |
23 |
199 |
1 |
Source:Tableau 2 CAPTURES DE SARDINELLA SPP. DANS LA RÉGION DE LA CIPASE PAR DIVISION ET PAR MOISAngolan catches
1956 - 72 from Campos Rosado. 1973Congolese catches
1973 - 77 from ICSEAF Statistical BulletinIndustrial
from CECAF Statistical Bulletin l and 2
Artisanal catches estimatedNote: Ail industrial catches reported for CECAF Division 34.3.6 have been caught in that Division except in 1974 and 1975 when 20 and 30Z respectively came from the ICSEAF area south of the Congo River.South African catchesfrom Ghéno and de Campos Rosado, 1972Catches of other countries from ICSEAF Statistical Bulletin
* mixed pelagic species (Chloroscombrus chrysurus, Trachurus spp., Brachydeuterus auritus, etc.)Tableau 4 CAPTURES, EFFORT, ET CAPTURES PAR UNITÉ D'EFFORT DE S. AURITA, S. MADERENSIS ET SARDINELLA SPP DANS LA ZONE CONGO/ANGOLAN.K. = not known
Source:
ICSEAF Div. 1.1, 1.2 and 1.3 (1956-1972) Rosado, J.M. De Campos, 1972
ICSEAF Div. 1.1, 1.2 and 1.3 (1973-1977) Stat. Bail. ICSEAF Vol. 1-7
CECAF Statistical Div. 34.3.6: - Centre ORSTOM, Pointe Noire, Congo
* Data refer to the main industrial fishing company only.
Tableau 5a
CAPTURES DE S. AURITA PAR JOUR DE PÊCHE DANS LES EAUX CONGOLAISES PAR LES SENNEURS PONTENEGRINS PAR MOIS ET PAR AN (CHIFFRE NON CORRIGE EN FONCTION DE L'AUGMENTATION DU TONNAGE DES BATEAUX)
|
Year |
J |
F |
M |
A |
M |
J |
J |
A |
S |
O |
N |
D |
Total |
|
1964 |
0.0 |
- |
- |
- |
- |
2.5 |
6.4 |
4.5 |
6.8 |
2.3 |
11.8 |
4.8 |
3.2 |
|
1965 |
4.2 |
10.6 |
1.6 |
1.9 |
5.1 |
5.4 |
4.4 |
2.8 |
4.0 |
4.7 |
8.6 |
6.4 |
4.8 |
|
1966 |
7.6 |
10.6 |
6.9 |
4.2 |
5.5 |
1.6 |
1.5 |
0.4 |
4.2 |
0.0 |
4.9 |
3.9 |
4.1 |
|
1967 |
1.3 |
0.5 |
0.2 |
0.7 |
0.9 |
0.2 |
1.6 |
1.3 |
2.2 |
1.1 |
2.1 |
0.3 |
1.1 |
|
1968 |
0.3 |
0.9 |
1.5 |
1.4 |
1.3 |
1.3 |
0.9 |
4.3 |
3.2 |
1.3 |
2.7 |
5.8 |
2.1 |
|
1969 |
3.6 |
4.9 |
2.0 |
3.2 |
8.5 |
6.0 |
4.7 |
6.6 |
6.4 |
11.4 |
15.3 |
8.2 |
6.7 |
|
1970 |
19.3 |
6.3 |
3.0 |
5.4 |
6.6 |
15.0 |
17.7 |
7.2 |
1.7 |
0.0 |
0.6 |
0.4 |
5.6 |
|
1971 |
1.6 |
0.3 |
0.1 |
0.0 |
6.9 |
16.0 |
2.9 |
5.0 |
0.8 |
2.3 |
1.4 |
2.5 |
2.9 |
|
1972 |
5.5 |
5.0 |
13.1 |
32.3 |
35.2 |
23.8 |
14.0 |
13.4 |
14.4 |
11.6 |
21.3 |
35.1 |
16.1 |
|
1973 |
25.0 |
15.9 |
30.4 |
15.6 |
9.4 |
26.3 |
32.4 |
29.3 |
13.7 |
13.1 |
6.1 |
19.3 |
17.3 |
|
1974 |
7.0 |
14.1 |
12.6 |
23.0 |
27.5 |
24.4 |
18.2 |
17.0 |
4.5 |
2.1 |
- |
3.7 |
10.6 |
|
1975 |
3.6 |
- |
1.7 |
- |
2.8 |
5.8 |
1.8 |
1.4 |
0.0 |
- |
- |
- |
1.5 |
|
1976 |
7.6 |
0.3 |
0.3 |
3.2 |
6.0 |
5.1 |
8.2 |
5.5 |
2.1 |
2.6 |
0.6 |
4.0 |
3.8 |
|
1977 |
3.8 |
1.2 |
3.5 |
0.6 |
2.3 |
3.0 |
4.7 |
1.8 |
0.9 |
0.3 |
0.1 |
1.7 |
2.0 |
|
1978 |
3.8 |
0.2 |
- |
1.0 |
4.4 |
10.2 |
15.7 |
4.4 |
9.6 |
5.6 |
2.2 |
4.5 |
5.3 |
CAPTURES DE S. MADERENSIS PAR JOUR DE PÊCHE DANS LES EAUX CONGOLAISES PAR LES SENNEURS PONTENEGRINS PAR MOIS ET PAR ANNEE (CHIFFRES NON CORRIGES EN FONCTION DE L'AUGMENTATION DU TONNAGE DES BATEAUX)
|
Year |
J |
F |
M |
A |
M |
J |
J |
A |
S |
O |
N |
D |
Total |
|
|
1964 |
4.7 |
8.6 |
6.3 |
7.7 |
7.6 |
9.4 |
10.0 |
6.2 |
2.7 |
4.0 |
1.8 |
3.3 |
6.0 |
|
|
1965 |
3.4 |
3.7 |
5.8 |
4.1 |
8.9 |
3.1 |
8.1 |
0.9 |
6.3 |
5.8 |
9.7 |
8.9 |
5.5 |
|
|
1966 |
3.3 |
1.9 |
1.4 |
2.0 |
4.3 |
6.3 |
8.3 |
3.8 |
5.5 |
4.1 |
5.6 |
6.6 |
4.2 |
|
|
1967 |
8.7 |
6.8 |
13.9 |
9.6 |
6.1 |
13.1 |
5.5 |
11.5 |
7.6 |
3.4 |
7.9 |
8.0 |
8.2 |
|
|
1968 |
14.4 |
11.0 |
6.0 |
7.8 |
11.2 |
5.9 |
9.3 |
11.1 |
12.7 |
4.6 |
11.3 |
5.2 |
8.9 |
|
|
1969 |
6.9 |
4.8 |
11.3 |
12.2 |
12.8 |
9.7 |
4.9 |
6.1 |
1.9 |
2.3 |
2.7 |
3.9 |
6.3 |
|
|
1970 |
2.0 |
7.4 |
10.4 |
8.7 |
8.7 |
2.7 |
4.5 |
3.9 |
13.9 |
5.0 |
6.1 |
6.3 |
6.6 |
|
|
1971 |
2.2 |
4.1 |
2.9 |
8.2 |
6.2 |
4.1 |
4.2 |
8.0 |
3.5 |
1.7 |
1.7 |
3.4 |
4.0 |
|
|
1972 |
7.1 |
3.4 |
4.8 |
2.4 |
0.5 |
1.2 |
4.9 |
5.4 |
11.9 |
3.9 |
4.8 |
15.0 |
4.8 |
|
|
1973 |
8.4 |
3.3 |
2.8 |
4.7 |
6.7 |
0.6 |
3.7 |
1.2 |
7.0 |
3.0 |
3.2 |
1.0 |
3.7 |
|
|
1974 |
8.6 |
6.8 |
6.1 |
1.4 |
3.2 |
1.6 |
1.1 |
0.2 |
4.7 |
12.4 |
15.2 |
12.2 |
6.9 |
|
|
1975 |
9.4 |
14.5 |
8.2 |
11.0 |
19.4 |
5.5 |
9.7 |
8.1 |
8.7 |
10.3 |
9.5 |
9.8 |
10.0 |
|
|
1976 |
4.0 |
11.6 |
8.8 |
13.3 |
11.1 |
17.1 |
4.6 |
6.5 |
9.2 |
6.1 |
8.3 |
10.3 |
8.5 |
|
|
1977 |
6.2 |
12.0 |
8.7 |
13.2 |
24.7 |
10.1 |
8.7 |
5.6 |
6.0 |
4.0 |
5.5 |
8.2 |
9.0 |
|
|
1978 |
6.9 |
2.2 |
1.5 |
19.1 |
8.8 |
4.8 |
5.0 |
5.6 |
4.3 |
4.9 |
4.9 |
10.6 |
6.2 |
|
Tableau 6a
INDICES GONADOSOMATIQUES MENSUELS MOYENS DE S. AURITA FEMELLE
|
Month |
Year |
|||||||||||
|
1967 |
1968 |
1969 |
1970 |
1971 |
1972 |
1973 |
1974 |
1975 |
1976 |
1977 |
1978 |
|
|
January |
2.83 |
4.90 |
1.87 |
1.47 |
6.40 |
6.93 |
0.60 |
2.04 |
4.80 |
4.29 |
0.90 |
6.84 |
|
February |
2.63 |
1.09 |
1.02 |
0.94 |
0.88 |
0.76 |
0.60 |
2.06 |
2.27 |
1.20 |
6.04 |
4.30 |
|
March |
1.35 |
1.62 |
0.85 |
0.75 |
- |
0.98 |
1.10 |
2.61 |
1.09 |
1.15 |
2.31 |
- |
|
April |
4.43 |
3.92 |
2.59 |
2.62 |
7.30 |
1.95 |
3.85 |
5.52 |
3.74 |
2.68 |
3.94 |
6.52 |
|
May |
5.10 |
6.52 |
4.90 |
4.87 |
10.47 |
0.72 |
3.79 |
6.33 |
2.18 |
3.86 |
10.15 |
11.26 |
|
June |
7.68 |
5.96 |
2.78 |
6.88 |
7.15 |
0.73 |
9.04 |
4.42 |
3.14 |
5.11 |
8.02 |
6.44 |
|
July |
5.49 |
6.09 |
1.17 |
2.39 |
3.49 |
1.13 |
0.64 |
1.48 |
3.48 |
4.55 |
6.22 |
4.76 |
|
August |
7.74 |
6.87 |
1.53 |
3.37 |
3.74 |
0.58 |
0.88 |
1.62 |
1.89 |
3.69 |
4.63 |
3.03 |
|
September |
6.67 |
6.04 |
1.16 |
3.98 |
8.05 |
0.65 |
0.75 |
2.75 |
2.19 |
1.11 |
4.53 |
2.33 |
|
October |
1.29 |
3.79 |
0.62 |
1.72 |
2.40 |
1.83 |
0.82 |
3.12 |
1.50 |
2.76 |
1.25 |
1.42 |
|
November |
4.23 |
3.84 |
0.81 |
1.23 |
3.76 |
0.52 |
0.71 |
2.50 |
0.93 |
2.96 |
1.11 |
1.10 |
|
December |
6.30 |
1.94 |
1.46 |
3.32 |
5.95 |
1.02 |
2.23 |
5.25 |
4.59 |
1.96 |
8.49 |
1.10 |
|
|
4.65 |
4.38 |
1.73 |
2.80 |
4.96 |
1.48 |
2.09 |
3.30 |
3.15 |
2.94 |
4.80 |
4.09 |
Source: Fontana (in press)
Tableau 6b
INDICES GONADOSOMATIQUES MENSUELS MOYENS DE S. MADERENSIS FEMELLE
|
Month |
Year |
|||||||||||
|
1967 |
1968 |
1969 |
1970 |
1971 |
1972 |
1973 |
1974 |
1975 |
1976 |
1977 |
1978 |
|
|
January |
5.36 |
4.22 |
3.67 |
6.59 |
6.97 |
7.50 |
1.92 |
10.41 |
2.91 |
4.96 |
4.95 |
7.01 |
|
February |
2.36 |
3.51 |
1.67 |
3.30 |
6.97 |
3.45 |
0.70 |
5.75 |
2.31 |
4.16 |
4.52 |
4.91 |
|
March |
2.06 |
3.28 |
1.96 |
2.92 |
9.53 |
- |
1.39 |
6.23 |
2.50 |
2.62 |
10.47 |
4.37 |
|
April |
4.34 |
5.08 |
3.43 |
2.60 |
7.46 |
- |
1.76 |
4.05 |
3.25 |
4.11 |
3.59 |
3.19 |
|
May |
2.63 |
3.87 |
3.43 |
4.87 |
6.60 |
- |
0.82 |
2.49 |
3.40 |
2.56 |
2.30 |
5.03 |
|
June |
3.86 |
4.50 |
2.69 |
5.47 |
5.56 |
0.71 |
1.17 |
3.75 |
7.25 |
3.74 |
3.60 |
2.83 |
|
July |
4.51 |
5.64 |
3.18 |
4.78 |
4.66 |
- |
0.88 |
3.31 |
3.52 |
10.94 |
3.87 |
1.51 |
|
August |
5.71 |
5.40 |
3.82 |
6.24 |
7.90 |
1.01 |
1.84 |
1.58 |
4.58 |
5.38 |
5.40 |
3.69 |
|
September |
7.34 |
6.90 |
3.85 |
4.77 |
9.94 |
3.70 |
2.92 |
6.74 |
4.86 |
5.05 |
7.09 |
2.05 |
|
October |
- |
4.57 |
2.08 |
2.41 |
3.01 |
2.41 |
1.66 |
3.64 |
3.20 |
3.76 |
2.77 |
1.98 |
|
November |
3.57 |
2.69 |
1.20 |
3.27 |
3.10 |
1.41 |
1.74 |
3.66 |
3.04 |
2.90 |
5.30 |
1.83 |
|
December |
4.64 |
3.34 |
2.92 |
5.69 |
8.67 |
0.62 |
2.90 |
4.85 |
4.56 |
4.76 |
7.37 |
9.45 |
|
|
3.87 |
4.42 |
2.83 |
4.41 |
6.70 |
1.73 |
1.64 |
4.70 |
3.78 |
4.58 |
5.10 |
3.99 |
Source: Fontana (in press)
Tableau 7a
ABONDANCE MOYENNE DES LARVES DE S. MADERENSIS
AVERAGE ABUNDANCE OF LARVAE OF S. MADERENSIS AT PLANKTON STATIONS SITUATED ALONG LINES FROM THE COAST SEAWARD FOR 14 LINES BETWEEN GABON AND CONGO, IN DIFFERENT MONTHS (FROM DESSIER AND PIANET, 1971). THE NUMBER OF LARVAE EXPRESSED ISA LOGARITHMIC SCALE.
|
|
Line
|
May |
August |
September |
November |
January |
March |
July |
|
1968 |
1968 |
1968 |
1968 |
1969 |
1969 |
1969 |
||
|
Libreville |
1 |
4 |
3 |
3 |
2 |
3 |
3 |
2 |
|
|
2 |
4 |
5 |
4 |
3 |
5 |
4 |
5 |
|
Cap Lopez |
3 |
4 |
5 |
3 |
3 |
4 |
3 |
4 |
|
|
4 |
4 |
6 |
|
3 |
4 |
4 |
2 |
|
|
5 |
4 |
5 |
|
2 |
2 |
5 |
|
|
|
6 |
3 |
4 |
5 |
3 |
3 |
5 |
2 |
|
|
7 |
4 |
4 |
5 |
2 |
4 |
4 |
1 |
|
|
8 |
4 |
5 |
5 |
4 |
5 |
4 |
3 |
|
|
9 |
5 |
5 |
6 |
4 |
4 |
3 |
2 |
|
|
10 |
4 |
3 |
5 |
4 |
1 |
5 |
4 |
|
|
11 |
4 |
4 |
5 |
3 |
2 |
2 |
5 |
|
Pointe Noire |
12 |
4 |
3 |
5 |
3 |
3 |
4 |
2 |
|
|
13 |
2 |
3 |
5 |
2 |
2 |
4 |
3 |
|
|
14 |
3 |
3 |
5 |
2 |
1 |
4 |
3 |
Tableau 7b
ABONDANCE MOYENNE DES LARVES DE S. AURITA
AVERAGE ABUNDANCE OF LARVAE OF S. AURITA ALONG THE GABON-CONGO COAST (AS TABLE 9a FOR S. MADERENSIS (FROM DESSIER AND PIANET, 1971)
|
|
Line
|
May |
August |
September |
November |
January |
March |
July |
|
1968 |
1968 |
1968 |
1968 |
1969 |
1969 |
1969 |
||
|
Libreville |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
6 |
|
|
2 |
0 |
3 |
2 |
0 |
0 |
0 |
5 |
|
Cap Lopez |
3 |
1 |
5 |
3 |
0 |
0 |
0 |
6 |
|
|
4 |
2 |
4 |
|
0 |
0 |
0 |
4 |
|
|
5 |
3 |
2 |
|
0 |
0 |
0 |
0 |
|
|
6 |
4 |
2 |
4 |
0 |
0 |
3 |
0 |
|
|
7 |
3 |
5 |
4 |
0 |
0 |
0 |
0 |
|
|
8 |
0 |
4 |
3 |
2 |
0 |
0 |
2 |
|
|
9 |
0 |
2 |
3 |
3 |
0 |
0 |
2 |
|
|
10 |
0 |
0 |
4 |
3 |
0 |
0 |
6 |
|
|
11 |
0 |
1 |
5 |
0 |
0 |
0 |
1 |
|
Pointe Noire |
12 |
0 |
2 |
4 |
0 |
0 |
0 |
0 |
|
|
13 |
0 |
1 |
5 |
0 |
0 |
2 |
1 |
|
|
14 |
0 |
2 |
3 |
1 |
0 |
0 |
2 |
Fig. 2 Catch per unité of effort by species and area
A. Catch per boat-day of S. aurita, Congo (CECAF Division 34.3.6) (tonnes)
B. Catch per boat-day of S. maderensis, Congo (tonnes)
C. Catch per boat-year, Sardinella spp., ICSEAF Division 1.1 (x 102 tonnes)
D. Catch per boat-year, Sardinella spp., ICSEAF Division 1.2 (x 102 tonnes)
Fig. 3 Températures de surface moyennes durant le premier trimestre au Gabon, au Congo et en Angola (Atlas de J. Merle)
Fig. 4 Températures de surface moyennes durant le troisième trimestre au Gabon, au Congo et an Angola (Atlas de J. Merle)
M/N8488/F/10.80/1/200
