Annexe 13

THE PORTUGUESE FISHERY IN THE CECAF AREA IN 1980–1983

by Manuel Lima Dias

Instituto Nacional de Investigaçao das Pescas, Lisbon

1. INTRODUCTION

In the 1960's, the Portuguese fishery in the CECAF area was rather important with more than 40 trawlers fishing mainly in divisions 34.1.3 and 34.3.1. For internal as well as international reasons, the number of fishing vessels and trips have gradually declined. Thus, in 1980, the fleet consisted of only 23 vessels, of which 13 carry ice and 10 are refrigerated. The total tonnages are respectively 5085 and 5101 GRT. The main species caught, the hakes, were gradually replaced by Plectorhynchus mediterraneus (rubberlip grunt) and Sparus caeruleostictus (bluespotted seabream). Recently, the artisanal fishery has taken the place of the trawl fishery. The main gears used being in order of importance gillnets and longlines.

2. STATISTICS

Catch statistics have always been difficult to obtain in the Portuguese fishery and the recent shift towards the artisanal fishery has increased this problem. Although as yet imperfect Portugal has regularly presented STATLANT 34A forms on its trawl catches. Table 1 presents a corrected version of some of the figures previously presented since 1980. In table 2 are summarized catches by species or species group landed by trawlers during the period 1975– 1983 together with some data on the corresponding fishing effort. This table shows the decline in the hake catches which declined from 10% of the total catch in 1980 to only 1.4% in 1983. For the hakes caught with longlines and gillnets it is very difficult to obtain correct statistics by gear in the different fishing ports. It is therefore impossible for us to present data on the total catches of these two gears. In Lisbon, we sampled hakes landed by artisanal fishing boats in order to know the composition of the catches. Data here presented concern only the vessels sampled. In 1982, we also carried out some observations onboard a vessel fishing with gill nets and as well as on a trawler.

3. THE HAKE FISHERY

The basic data obtained from our sampling programme in Lisbon and other fishing ports allow us to reconstruct the composition of the hake landings by trawlers as presented in table 3 and figure 1. One can see that the mean length in the catch was similar in 1981 and 1982 and of the order of 39.8–39.9 cm, against 42.4 cm in 1983. The mean weight was however very similar in 1981 and 1983 (0.54 kg), and higher in 1982 (0,65 kg).

The length-frequency structure of the catch shows that in 1981 the dominating size classes were those between 34–35 and 42–43 cm, and in 1982 between 40–41 and 46–47 cm. In 1983, the most abundant fish were between 36–37 and 42–43 cm long, but the numbers of fish sampled were much lower as a result of the decline in trawl landings.

Table 4 and figure 2 show the amounts of hakes caught in 1975–1983 as well as the total fishing effort expressed in days and hours of fishing. Since 1977, the hakes ceased to be target species of the trawl fishery. In 1980, according to table 4, however, catches of hakes per unit of effort for as yet unexplained reasons rose to levels comparable to those of 1975– 1976.

As mentioned above, it is difficult to estimate the quantities of hakes landed by the artisanal fishery. The length composition of catches by longlines and gillnets landed at Lisbon during 1982 are shown in table 5 and figure 3. This figure shows that the gillnets the highest catches were made in the size classes 41–53 cm and in the longlines 43–55 cm. Data also exist on the structure of the hake landings in Lisbon during the year 1981 (Fig. 4). In table 6 this is compared with the structure of the trawl catch. A comparison of length structure of the hakes caught by longlines in 1981 and 1982 shows little difference with peaks at 46–47 to 54–55 cms.

In 1982 we made some observations on board a fishing vessel, using longlines, in division 34.3.1. The target species were hakes, of which the total catch was 6025 kg (2630 kg of M. merluccius and 3395 kg of M. senegalensis). Another significant species caught during this trip was the large-eye dentex (Dentex macrophthalmus) of which 4440 kg was caught. The following table shows the catches of each of the two species of hakes and the corresponding fishing effort. Catch rates of M. Senegalensis were highest.

	Catch	Effort	CPUE
	(kg)	(h)	(kg/h)
European hake	2630	48	54.8
Black hake	3395	37	91.8

Table 7 and figure 5 illustrate the length composition of the catches of the two hake species. M. senegalensis was dominant in all size classes below 59–60 cm. The largest hake found (72–73 cm) was a M. merluccius.

During the same cruise, the sex ratio and sexual maturity stages were studied in both species. The results for M. merluccius (170 specimens analysed) are shown in table 8. The sex ratio was approximately 1 : 1.5 (females, males). 68% of the males were in maturity stage 4 and 5, and 75% of the females in 2 and 3. In M. senegalensis a sex ratio of 1:1 was observed (125 specimens). As in M. merluccius, most females were in maturity stages 2 and 3. Males, however, were mostly (84%) in stages 2 and 4, in equal proportions.

4. POMADASYIDAE AND SPARIDAE

As mentioned earlier, some other demersal species have taken over the place of the hake as target species in the Portuguese artisanal and trawl fisheries : the rubberlip grunt Plectorhynchus mediterraneus as well as the seabreams Sparus spp. and Dentex spp. Plectorhynchus has been studied since it became important in the landings. For lack of further information, a number of sparids, commonly called “pargos encarnados” in porguguese (red breams) are grouped together in the catch statistics in the categories Sparus spp. or Dentex spp. One of these species is the bluespotted seabream (Sparus caeruleostictus), which is also an important component of the Portuguese catches in the CECAF area.

Table 9 and figure 6 show for the individual years 1981–1983 the total numbers of P. mediterraneus landed by the trawl fishery. These data are new, as the weights shown below table 9 have so far never been presented on STATLANT forms. It appears from table 9 and figure 6 that the length composition of the P. mediterraneus landings show differences between each of the three years, 1983 being the farthest apart.

For the artisanal landings of these species, we had the same problems as already mentioned for the hakes. Some observations were made on the gill net catches in 1981 and 1982. They are reproduced in tables 10 (1981, 1982) and 11 (1982 by quarter), but concern only the fraction of the landings sampled. The total frequencies for 1982 are shown in figure 7. Fish in length ranges of 40–50 cm were predominant : the largest specimen caught measured 77 cm.

In 1982, we also carried out some observations onboard a trawler, of which the results are given in table 12. Here it is apparent that 25% of the catch was made up of P. mediterraneus, and 15% of seabreams NEI (Sparus, Dentex). Highest catches were made in statistical division 34.1.3, where the P. mediterraneus catch was 10 x that of division 34.1.3 and those of seabreams more than 3x. Length frequencies for P. mediterraneus are given by division in table 13 and figure 8. Fish in the length range of 30–40 cm were most abundant in division 34.1.3 and 34.3.1 those of 33–34 and 39–43 cm.

During this same trip Sparus caeruleostictus was also sampled. For this species, the catch was almost 3x higher in statistical division 34.1.3 than 34.3.1. Length frequencies (figure 9) show that the length classes of 30–31 to 36–37 were most numerous in 34.1.3, and 34.3.1 those of 40–45 cm. The following table summarises catches per unit of effort by statistical divisions (kg/hour):

	34.1.3	34.3.1	TOTAL
Plectorhynchus mediterraneus	129	70	79.6
Sparus caeruleostictus	85	40	51.0

The length-wight relationship for P. mediterraneus is W = 1.02 1^3.12 A preliminary age-length key is given in table 15.

5. FURTHER STUDIES

It is intended to carry out more investigations on landings of hakes in fishing ports and to improve the collection of statistics by gear and statistical division, not only for the species mentioned, but also for other important species in the trawl and artisanal catches. Further trips on commercial vessels are also foreseen, in order to obtain more reliable data on the main species caught in the area.

TABLE 1

MAIN CATCHES BY PORTUCUESE TRAWL FLEET IN CECAF AREA
1980 – 1681 – 1982 – 1983
Divisions 34.1.1, 34.1.3, 34.3.1, 34.1.2

Fishes (SELACHII)			Years
Scientifio names	C. names English	C. mames Portuguese	1980	1981	1982
Squlidas	Dogfish sharks nei	Galkados a afins nep	291	512	377
Rajiforaes-Hypotremata	Skates and rays nei	Raies a afins nep	28	32	61
Rajiformes-Hypotremata	Skates and rays nei	Raias e afins nep	28	32	61
Fishes (OSTEICHTHYES)
Sardinella pp.	Sardinelas nei	Sardinelas nep	78	22	44
Congridae	Congersela nei	Congres (Safios) a afins nep	70	26	38
Merluccious merkuccious	European hake	Pesceda branca	844	71	99
Ferluccius senegtalensis	Senegalese hake	Pesceda branca	844	71	99
Merluccius spp.	Total hakes	Total pescadas	1767	135	198
Trisopterus luscus	Pouting	Faneca	-	-	7
Phycis spp.	Forkboards nei	Abróteas nep	97	23	20
Zeus faher	Atlantic John dory	Cale megro	66	59	57
Epinepnelus spp.	GTroupers nei	Gareupas e meros nep	696	935	354
Sarrabidae	Seabasses, scaperches nei	Cherne, robalos cap	10	10	17
Pematous saltator	Bluefish	Ancheva	17	34	37
Carangidae	Carangids nei	Carangideos nep	727	543	1829
Brama brama	Atlantic pomfret	Xapeta	13	-	-
Pomadanyidae	Grunte (Grunters) nei	Roncodores e Pombos nep⁽¹⁾	364	321	293
Scianeidae	Keagre, croakers, drums nei	Corrinas a afins nep	716	1149	851
Mullidae	Surmullets nei	Salmnetes nep	16	20	17
Sparus spp./Dentex spp.⁽¹⁾	“Pargo” Breams nei⁽¹⁾	Pargos⁽¹⁾ a capatñes nep	3826	4622	2979
Boops boops	Bogue	Boga do mar	79	91	84
Dentex spp.	Dentex nei	Cachmchoc nep	491	54	248
Diplodus spp./Lithognathus mormyzus	Seabreams nei	Sarges, safia nep	407	-	375
Pagollus spp.	Pandoras nei	Bices nep	23	29	172
Spondyliosoma cantharus	Black bream	Choupa	292	183	79
Sparidae	Total Seabreams	Total Esparfdeos	5118	4979	3937
Ancanthuridae	Surgeonfishes nei	Unhas nep	8	10	3
Lepidopus caudatus	Silver scabbardfish	Peines espada	1170	1164	1590
Scomberoidei	Mackerel-Like fishes nei	Escombrídeos e afins nep	30	48	57
Scomcer (phoumatophorus) japonicus	Chub mackerel	Cavala	1323	1077	1275
Thunnidae	Tuna-Like fishes nei	Atune a afins nep	261	530	967
Serda esrda	Atlantic bonito	Sarranjfo	102	361	-
Stromateidae	Butterfishes, harvestfishes nei	Pompas a afins nep	4	4	19
Sphyraena spp.	Barracudas nei	Bicudas nep	8	6	2
Mugilidae	Mullets nei	Taínbas nep	10	5	5
Scorpaenidae	Scorpionfishes nei	Cantarilhos e rescassos nep	493	15	14
Triglidae	Curnards nei	Cantarilhos e rascassos nep	-	-	42
Pleurnectiformes	Flatfishes (tongue seles)nei	Peixes chatos nep	1	2	1
Solna vulgaris vulgaris	Common sole	Lingado legftimo	10	9	3
Cynoglussidae	Tonguefishes (Tongue soles) nei	Tamberis nep	239	143	59
Lophiidae	Anglerfishes nei	Tamberis nep	59	5	7
	Other fishes	Cutres peixes	1355	399	232
	Total fishes	Total de peixes	15147	12580	12423
Mollusca	Molluscs	Molusces
Sepia spp.	Cuttlefishes nei	Chocus nep	65	119	47
Loliginidae/Commas trephidae	Squids nei	Lulas a Potras nep	308	32	12
Octopodidae	Octopuses nei	Polves nep	1	62	5
	Other molluscs	Outres moluscos	42	7	5
	Total molluscs	Total de moluscs	416	220	69
Crustacea	Crutaceaa	Crusticeos
Palinurus spp.	Palimurid spiny lobaters nei	Lagostas nep	-	1	1
	Other cruntneans	Outrne crustá ceos	101	7	1
	Total crustaceans	Total de crustáceos	101	8	2
	Total geral	Total geral	15664	12808	12494

(1) In this firuges are included the landings fo Rubberlip grunt (Flectorhinchus moditerraneus)

TABLE 2

PORTUGUESE TRAWL FISHERY IN CECAF AREA (FAO -34) 1975 – 1982
MAIN “SPECIES” LANDED (TONS) AND FISHING EFFORT

SPECIES			Years
			1975	1976	1977	1978	1979	1980	1981	1982
Merluescius spp.	Pescadas	Hakes	3982	4701	856	364	523	1767	135	198
Epinephelus spp.	Garoupas e meros	Groupers	-	592	-	750	-	696	935	354
Pomadanys spp.	Roncadores Grunts	Grunts	407	503	-	263	-	364	321	293
Pletorhinchus mediterraneus	Pombo (Pargo mulato)	Rubberlip grunt	3018	2833	2637	1501	3471	1738	1867	1810
Sciaenidae	Corvinas, rabetas, rainhas	Moagres	87	101	675	375	421	716	1149	851
Sparus spp. e Dentex spp.	Pargos e capatões	Sebreams	3018	2833	2638	1500	3468	2088	2755	1169
Dentex spp.	Cachuchos	Pargo breams nei	1273	1165	1032	891	114	491	54	248
Diplosus spp.	Sargos e safias	Breams		246	-	300	-	407	-	375
Pagelpus spp.	Bicas	Pandoras				-		23	29	172
Spondyliosoma canthaurs	Choupa	Black seabream				375		292	83	79
TOTAL SPARIDAE			4291	4244	3670	3066	3582	3301	2921	2043
	OUTROS PEIXES	OTHER FISHES	8894	15957	4932	2089	5830	6565	5252	6874
	TOTAL PEIXES	TOTAL FISHES	20679	28931	12770	8408	13827	15147	12580	12423
Sepia spp.	Chocos	Cuttle fishes						65	119	47
Loliginidae	Luas	Squids						308	32	12
Octopus spp. Ommastrephidae	Polvos e Potras	Octopus, Flying squids						1	62	5
	Outos Moluscos	Other Molluscs						42	7	5
TOTAL MOLLUSCA			300	152	-	116	119	416	220	69
Palinerus spp.	Lagostas nep	Lobsters nei							1	1
	Outros Crustáceos	Other Crustaceans						101	7	1
	Total Crustáceos	Total Crustaceans						101	8	2
TOTAL GERAL (TONS)			20979	29083	12770	8524	13946	15664	12808	12494
	Esforço	Effort
	Dias de pesca	Fishing days	4486	4532	2701	1643	2590	2589	1456	902*
	Horas de pesca	Fishing hours	78200	80500	48622	29565	46596	46220	26336	26622*
	Rendimento Kg/h	Yield Kg/h	268.3	361.3	262.6	288.3	299.3	338.9	486.3	469.3

* Estimated

TABLE. 3

PORTUCUESE TRAWL FISHERY IN CECAF AREA 1981, 1982, 1983
Hake landings (Merluccius spp.), 2 Cm. classes - %

	1981		1982		1983
Cm	TOTAL		TOTAL		TOTAL
	landed	%	landed	%	landed	%
21	152	1.0	198	0.7
23	1350	5.4	884	2.9
25	6024	24.2	9826	32.3
27	9180	36.9	27236	89.4
29	3763	15.1	26359	86.6
31	1839	7.4	18986	62.4	1977	6.2
33	7223	29.0	13888	45.7	5930	18.6
35	25043	100.7	10077	33.1	11861	37.3
37	29211	117.4	19296	63.4	49419	155.3
39	33058	132.9	20483	67.3	71163	223.6
41	32518	130.7	23378	76.8	49419	155.3
43	32653	131.3	27685	91.0	49419	155.3
45	29768	119.7	30982	101.7	21744	68.3
47	24908	100.1	23537	77.3	17791	55.9
49	8792	35.3	12121	39.8	19768	62.1
51	2160	8.7	11356	37.3	11861	37.3
53	1080	4.3	10565	34.7	3954	12.4
55			5085	16.7	-	-
57			2915	9.6	3954	12.4
59			1734	5.7
61			2882	9.5
63			409	1.3
65			2790	9.2
67			633	2.1
69			791	2.6
71			409	1.3
№	248722		304505		318260
W (Ton)	135		198		172
(cm)	39.9		39.8		42.4
(kg)	0,543		0,651		0,541

Table 4

PORTUGUESE TRAWL FISHERY IN CECAF AREA
1975 – 1983

Total and hake fishery and fishing effort

Year	Fishery (Tons.)			Fishing effort
Year	TOTAL	HAKES	%	Days fishing	Hours fishing
1975	20979	3982	18.9	4486	78200
1976	29083	4701	16.2	4532	80500
1977	12770	856	6.7	2701	48622
1978	8524	364	4.3	1643	29565
1979	13946	523	3.8	2590	46596
1980	15664	1767	11.3	2589	46220
1981	12808	135	1.1	1456	26336*
1982	12494	198	1.6	1447	26622*
1983	12615	172	1.4	3402	63220*

^* Estimated

Table 5

PORTUGUESS FISHERY IN CECAF AREA 1982

Artisanal fishery (line and gill nets)

Length composition of hakes landed by “artisanal” boats Sampling at fishing port (№of fishes and %)

	Line		Gill nets		Total
Total length	sampled	%	sampled	%	sampled	%
(cm)	300 kg		82114 kg		82314 kg
cm
27			96	1.0	96	1.0
29			48	0.5	48	0.5
31			48	0.5	48	0.5
33			48	0.5	48	0.5
35			799	8.2	799	8.2
37	8	25.8	1935	19.9	1943	19.9
39	5	16.1	2629	27.0	2634	27.0
41	3	9.7	6794	69.7	6797	69.5
43	18	58.1	8517	87.4	8535	87.3
45	20	64.5	12236	125.6	12256	125.4
47	23	74.2	14272	146.5	14295	146.3
49	30	96.8	13678	140.4	13708	140.3
51	51	164.5	10036	103.0	10087	103.2
53	47	151.6	6615	67.9	6662	68.2
55	23	74.2	5142	52.8	5165	52.8
57	20	64.5	3574	36.7	3594	36.8
59	12	38.7	2039	20.9	2051	21.0
61	13	41.9	2725	28.0	2738	28.0
63	10	32.3	1844	18.9	1854	19.0
65	8	25.8	1319	13.5	1327	13.6
67	8	25.8	1314	13.5	1322	13.5
69	3	9.7	1047	10.7	1050	10.7
71	5	16.1	577	5.9	582	6.0
73	-	-	-	-	-	-
75	-	-	44	0.5	44	0.5
77	-	-	-	-	-	-
79	3	9.7	-	-	3	0.03
81			-	-	-	-
83			44	0.5	44	0.5
85
Total	310		97420		97730

Table 6

PORTUGUESS HAKE FISHERY IN CECAF AREA 1981
Length composition of landings

Line fishery - A part of the total landings (sampling)
Trawl fishey - Total landed

	Line		Trawl
Cm	Sampling		Total landed
	N^o	%	№	%
21			152	1.0
3			1350	5.4
5			6024	24.2
7			9180	36.9
9			3763	15.1
31			1839	7.4
3	13	0.6	7223	29.0
5	47	2.2	25043	100.7
7	54	2.5	29211	117.4
9	203	9.5	33058	132.9
41	418	19.6	33518	130.7
3	877	41.0	32653	131.3
5	1369	64.0	29768	119.7
7	1884	88.1	24908	100.1
9	2628	122.9	8792	35.3
51	2236	104.6	2160	8.7
3	1478	69.1	1080	4.3
5	996	46.6
7	1909	89.3
9	611	28.6
61	756	35.4
3	935	43.7
5	947	44.3
7	1004	47.0
9	1087	50.8
71	447	20.9
3	461	21.6
5	66	3.1
7	187	8.7
9	91	4.3
81	9	0.4
3	9	0.4
5	-	-
7	69	3.2
9	43	2.0
91	6	0.3
3	2	0.1
5	-	-
7	138	6.5
9	49	2.3
101	131	6.1
3	-	-
5	-	-
7	176	8.2
9	-	-
111	43	2.0
№	21379		248722
W (Kg)	29732		135135
(Cm)	56.4		39.9
(Kg)	1.4		0.54

Table.7

PORTUGUESE GILL NET FISHERY IN CECAF AREA - 1982

Observations carried out on board a commercial ship - Div. 3.1
Hake catches (M. merluccius; M. semegalensis (mainly) %

	M. senegalensis		M.merluccius		TOTAL
Cm	№	%	№	%	№	%
27	4	0.05	3	0.04	7	0.09
29	4	0.05	-	-	4	0.05
31	11	0.1	-	-	11	0.1
33	4	0.05	-	-	4	0.05
35	15	0.2	9	0.1	24	0.3
37	153	2.0	30	0.3	183	2.3
39	361	4.5	191	2.5	552	7.2
41	681	8.9	385	5.0	1066	13.9
43	906	11.8	530	6.9	1436	18.7
45	949	12.3	514	6.7	1463	19.0
47	674	8.8	422	5.5	1096	14.3
49	448	5.8	287	3.7	735	9.5
51	251	3.3	169	2.2	420	5.5
53	135	1.8	101	1.3	236	3.1
55	84	1.1	65	0.9	149	2.0
57	58	0.8	33	0.4	91	1.2
59	36	0.5	46	0.6	82	1.1
61	26	0.3	21	0.3	47	0.6
63	-		18	0.2	18	0.2
65	-		12	0.2	12	0.2
67	4		21	0.3	25	0.4
69			6	0.07	6	0.07
71			3	0.04	3	0.04
73			9	0.1	9	0.1
75			12	0.2	12	0.2
N⁰	480		2887		7691
W (Kg)	3395		2630		6025
(Cm)	44.9		46.2		45.6
(Kg)	0.7		0.9		0.7

TABLE: 8

PORTUGUESE STUDIES IN CECAF AREA 1982
Hake - Merluccius merluccius - Stages of maturity (Z)

	FEMEAS							MACHOS
	FEMALES							MALES
	ESTADOS DE MATURAÇAO							ESTADOS DE MATURAÇAO							Total
	Stages of maturity							Stages of maturity							Ceral
%	1	2	3	4	5	6	Total	1	2	3	4	5	6	Total	%
Cl. comp.	%	%	%	%	%	%	%	%	%	%	%	%	%	%
39		2.8					1.5								1.0
40		2.8					1.5	100.0				7.7	100.0	7.9	3.8
1		2.8					1.5		50.0	33.3	7.7	7.7		15.8	6.7
2		2.8				14.3	3.0			33.3		7.7		7.9	4.8
3		11.1			33.3		10.6				23.1	23.1		15.8	12.5
4		5.6	7.1			14.3	6.1		50.0		15.4	15.4		15.8	9.6
5		2.8	35.7				9.1				15.4	15.4		10.5	9.6
6		8.3	21.4		22.2		12.1			16.7	7.7	7.7		7.9	10.6
7		11.1					6.1			16.7	30.8			13.2	8.7
8		8.3	21.4				9.1					7.7		2.6	6.7
9		5.6					3.0								1.9
50		11.1	7.1		11.1		9.1								5.8
1		5.6				14.3	4.5								2.9
2		5.6			11.1		4.5					7.7		2.6	3.8
3					22.2	28.6	6.1								3.8
4			7.1				1.5								1.0
5		2.8					1.5								1.0
6		5.6					3.0								1.9
7							-								-
8		2.8				14.3	3.0								1.9
9		2.8					1.5								1.0
60
1
2
3
4
5
6
7
8
9
70
71						14.3	1.5								1.0
No of	0	36	14	0	9	7	66	1	4	6	13	13	1	38	104
Fishes
	-	54.5	21.2	-	13.6	10.6		2.6	10.5	15.8	34.2	34.2	2.6

Scale of maturity

1 - Imature; 2 - Developing; 3 - Pre-spawning; 4 - Spawning; 5 - Post-spawning; 6 - Recovering

Table 9

PORTUGUESE TRAWL FISHERY IN CECAN AREA - 1981, 1987, 1983

Length compositions (landings) of Rubberlip grunt (Plecterhinchus mediterraneus), № of fish and %

	1981			1982			1983
CLASSES
									%
	1 cm	2 cm	%	1 cm	2 cm	%	1 cm	2 cm	(1 cm)	(2 cm)
19				83	83	0.004
20				-
1	414	414	0.2	242	242	0.01
2	551			852
3	2187	2738	1.3	3392	4244	2.1
4	2789			4240			353		0.2
5	9436	12225	5.8	10318	14558	7.1	-	353	-	0.2
6	20584			20614			2086		1.2
7	39529	60113	28.7	55666	76280	37.3	1541	3627	0.9	2.1
8	53203		-	83461			5311		3.1
9	64436	117639	56.1	108026	191487	93.6	7464	12775	4.3	7.4
30	64570			120233			10336		6.0
1	72070	136640	65.2	141845	2362078	128.1	11340	21676	6.6	12.6
2	67533			142716			14769		8.6
3	77422	144955	69.1	126590	269306	131.7	20371	35140	11.8	20.4
4	99762			132541			24201		14.0
5	118179	217941	104.0	130513	263054	128.6	27802	52003	16.1	30.1
6	143398			135214			42052		24.4
7	160760	304158	145.1	140110	275324	134.6	67035	109037	38.8	63.2
8	143344			131384			52213		30.3
9	130992	274336	130.8	121123	252507	123.4	76028	128241	44.1	74.3
40	105940			96265			106782		61.9
1	83305	89245	90.3	85229	181494	88.7	133484	240266	77.4	139.2
2	76458			53387			130032		75.4
3	66410	142868	68.1	36721	90108	44.1	151208	281240	87.6	163.0
4	61128			34340			160723		93.1
5	60015	121143	57.8	22032	56372	27.6	115653	276376	67.0	160.2
6	48916			25138			98869		57.3
7	50846	99762	47.6	11170	36308	17.8	103822	202711	60.2	117.5
8	42801			9695			70731		41.0
9	39723	82524	39.4	9679	19374	9.5	59954	130685	34.7	75.7
50	26059			7651			49036		28.4
1	24342	50401	24.0	8144	15795	7.7	43499	92535	25.2	53.6
2	17783			8907			32147		18.6
3	17697	35480	17.0	8821	17728	8.7	19997	52144	11.6	30.2
4	13273			7483			14058		8.1
5	12578	25851	12.3	4631	12114	5.9	16148	30206	3.4	17.5
6	8142			1771			9010		5.2
7	7754	15896	7.6	2314	4085	2.0	10579	19589	6.1	11.4
8	7158			\?\			7492		4.3
9	7073	14221	6.8	818	1567	0.8	4285	11777	2.5	6.8
60	5845			451			5611		3.3
1	5993	11838	5.6	280	731	0.4	1825	7436	1.1	4.3
2	6515			318			1742		1.0
3	6569	13084	6.2	-	318	0.2	6781	8523	3.9	4.9
4	3591			318			1121		0.6
5	4065	7656	3.7		318	0.2	2316	3437	1.3	1.9
6	5589						1177		0.7
7	2692	8381	4.0				629	1806	0.4	1.0
8	2435						2307		1.3
9	2028	4463	2.1				780	3037	0.5	1.8
70	1237						565		0.3
1	687	1924	0.9				376	941	0.2	0.5
2	661
3	96	757	0.4
4	12
5	31	43	0.0
6	-
7	16	16	0.0
8
9
80
№	2096622			2045475			1725661
W(Tons.)	1567			1810			2005
Y	39.5			36.7			44.1
(Kg)	0.9			0.9			1.2

TABLE:10

PORTUGUESE STUDIES IN CECAF AREA 1981, 1982

Length compositions of Rubberlip grunt (Plectorhiachus mediterraneus) Sampling on fishing port (№of fishes and % from ships sampled (Gill nets landings)

	1981		1982
Cm	№ of		№ of
	fishes	%	fishes	%
21
3	646	1.1
5	1032	1.9
7	2572	4.4	565	1.0
9	7813	8.3	643	1.2
31	5182	9.0	1795	3.2
3	8829	15.2	3545	6.4
5	17898	30.9	4417	8.0
7	25554	44.1	11368	20.5
9	33512	57.8	28675	51.8
41	43475	75.0	77527	139.9
3	66802	115.3	96216	173.7
5	76010	131.2	91130	164.5
7	70945	122.5	67594	122.1
9	62930	108.6	47436	85.6
51	41532	71.7	34129	61.6
3	28574	49.3	26789	48.4
5	20825	36.0	16206	29.3
7	13239	22.9	13079	23.6
9	12140	21.0	8738	15.8
61	10222	17.7	6416	11.6
3	11712	20.2	4439	8.0
5	6809	11.8	3122	5.6
7	7478	12.9	4219	7.6
9	4030	7.0	2740	4.9
71	1737	3.0	1638	3.0
3	684	1.2	606	1.1
5	39	0.1	588	1.1
77	14		395	0.7
№	579285		554015
W(kg)	691559		792598
I(Cm)	46.8		46.4
(Kg)	1.2		1.4

Table: 11

PORTUCESE STUDIES IN CECAF AREA 1932

Long compositions of Rubborlip grant (Plectorhiachus mediterraneus) - gill zeta landings
Sampling on fishing port (№ of fishes and %)

	1% Trimestra			2% Trimestro			3% Trimestro			4% Trimestro			TOTAL
cm	1 cm	2 cm	%	1 cm	2 cm	%	1 cm	2 cm	%	1 cm	2 cm	%	1 cm	2 cm	%
25	169												168
27	152	320	1.4				45	45	0.4	200	200	1.8	397	565	1.0
28	-						-			239			239
29	192	192	0.9				-			212	451	4.1	404	643	1.2
30	313						-			761			1074
31	254	567	2.6				45	45	0.4	422	1183	10.8	721	1795	3.2
32	365						45			656			1036
33	795	1180	5.3				383	428	3.8	1281	1937	17.8	2459	3545	6.4
34	652						410			1026			2120
35	1194	1876	8.4	241	241	2.2	106	516	4.6	736	1784	16.4	2297	4417	8.0
36	1470			443			1213			1090			4216
37	2292	3762	16.9	797	1240	11.2	806	2019	18.0	3257	4347	39.9	7152	11368	20.5
38	2113			2130			1974			4475			10742
39	5622	7735	34.8	1902	4082	36.9	3334	5308	47.4	7075	11550	105.9	17933	28675	51.8
40	10356			4911			7899			7803			30969
41	13195	23551	105.9	10759	15670	141.7	12539	19435	173.7	11035	18868	173.0	46558	77527	139.9
42	13535			11731			11486			12011			48313
43	16563	30098	135.3	8802	20583	186.1	11937	23423	209.3	10101	22112	202.7	47403	96216	173.7
44	17545			11299			11954			94.4			50202
45	13506	31051	139.6	9726	21025	190.1	9432	21386	191.1	8264	17668	162.0	40928	91130	164.5
46	14089			6454			9192			4789			34524
47	11934	25.23	117.0	9666	16120	145.8	7089	16281	145.4	4381	9170	84.1	33070	67594	122.1
48	10474			6361			3358			4847			25040
49	11350	21824	98.1	5167	11528	104.3	3350	6708	59.9	2529	7376	67.6	22396	47436	85.6
50	10070			2602			2787			2199			17658
51	9414	19281	87.6	3280	5882	53.2	2553	5340	47.7	1224	3423	31.4	16471	34129	61.6
52	9764			1261			2072			1967			15064
53	7832	17596	79.1	1622	2883	26.1	1445	3517	31.4	826	2793	25.6	11725	26789	48.4
54	5310			477			652			1089			8028
55	4780	10530	47.3	1418	1895	17.1	635	1287	11.5	1405	2494	22.9	8178	16206	29.3
56	4519			585			926			621			6651
57	3872	8391	37.7	1103	1688	15.3	756	1682	15.0	697	1318	12.1	6428	13079	23.6
58	2350			948			468			137			3903
59	2756	5106	23.0	927	1875	17.0	364	832	7.4	788	925	8.5	4835	8738	15.8
60	1640			995			445			713			3793
61	1230	2870	12.9	377	1372	12.4	771	1216	10.9	245	958	8.8	2623	6416	11.6
62	939			539			79			140			1967
63	1916	2755	12.4	665	1204	10.9	124	203	1.8	137	277	2.5	2742	4439	8.0
64	1317			407			292			108			2124
65	568	1835	8.5	68	475	4.3	292	584	5.2	70	178	1.6	998	3122	5.6
66	2112			612			425			-			3249
67	480	2592	11.7	-	612	5.5	527	952	8.5	63	63	0.6	1070	4219	7.6
69	631			1001			247			-			1879
70	10			532			124						666
71	741	751	3.4	231	763	6.9	-	124	1.1				972	1638	3.0
72	85			369			-						454
73	-	85	0.4		369	3.3	152	152	1.4				152	606	1.1
74	588												588
75	-	588	2.6										-	588	1.1
76	287												287
77	108	395	108										103	395	0.7
118	222416		1000.1	110576		1000.0	111938		999.9	109075		1000.1	554015		1000.2
W (Kg)	361743			161878			140069			128903			792598
I (cm)		48.0			46.7			45.5			43.9			46.4
W (Kg)		1.626			1.464			1.251			1.182			1.431

TABLE 12 - PORTUGUESE FISHERY IN THE CECAF WATERS - MAY 1982 STUDY TRIP ON BOARD A COMMERCIAL TRAWLER RESULTS OF THE FISHERY (Kg). FISHING EFFPRT AND YIELD

Fishes (SELACHII)			DIV. 34
Scientific names	C. namen(English)	C. names(Portuguese)	1.3	3.1	TOTAL
Pleurotremata	Smooth hounds and sharks nei	Caçõcs e tubarõeu nep	21570	1170	22740
Fishes (OSTHICHTHYES)
Dicentrarchus spp.	Sea bases nei	Robalos nep	690	900	1590
Epinnepgelus spp.	Groupers nei	Garoupas e meron nep	2430	1230	3660
Pomodasys spp.	Grunts nei	Roucadores nep	5940	660	6600
Pleeiorginchus mediterraneus	Rubberlip grunt	Pombo (Pargo mulato)	28230	2970	31200
Sciaenidae	Meagres, croakers, drums nei	Corvinas e afins nep	1380	1620	3000
Sparas spp. e Dentex spp.	Seabreams nei	Parges e capatões nep	5940	450	6390
Diplodus spp.	Breams nei	Sargos, safia nep	5940	450	6390
Sprnfyliodoms vsnyhstud	Black seabream	Choupa	30	720	750
Thyrsites atun	Snock	Senuca (Poguete)	1770	210	1980
Psetiodes bonneiti	Spiny turbot	Palma	810	180	990
	Other fishes	Outros peixes	2760	2280	5040
	Total fishes	Total de peixes	86872	16512	103384
Kollusca	Molluses	Molusces
Sepia spp.	Cuttlefishes nei	Chocos nep	1320	390	1710
	Rejects	Rejeições	17534	3692	21226
	Total general	Total geral	105726	20594	126320
	Fishing hours	Horas de pesca	303	99	402
	Yield Kg/hour	Rendimento	349	208	322

TABLE 13 PORTUGUESE STUDIES IN THE C.E.C.A.F. AREA ON BOARD A COMMERCIAL TRAWLER APRIL - MAY 1982 Length composition of Rubberlip grunt (Plectorhinechus mediterraneus)

Divisions - 1.3 + 3.1				1.3			3.1
Classes	1cm	2cm	%	1cm	2cm	%	1cm	2cm	%
23	13	13	0.6	13	13	0.7	-	-	-
-	-	-	-	-	-	-	-	-	-
25	77	77	3.4	77	77	4.0	-	-	-
26	157	-	-	155	-	-	2	-	-
27	229	386	16.9	219	347	19.5	10	12	3.2
28	477	-	-	451	-	-	26	-	-
29	899	1376	60.1	877	1328	69.3	22	48	12.8
30	1130	-	-	1045	-	-	85	-	-
31	1466	2596	113.3	1316	2361	123.2	150	235	62.6
32	1372	-	-	1122	-	-	250	-	-
33	1501	2873	125.4	1251	2373	123.8	250	500	133.7
34	1495	-	-	1316	-	-	179	-	-
35	1289	2784	121.5	1161	2477	129.2	128	307	82.1
36	1579	-	-	1457	-	-	122	-	-
37	1284	2863	125.0	1122	2579	134.6	162	284	75.9
38	1411	-	-	1200	-	-	211	-	-
39	1286	2697	117.7	1083	2283	119.1	203	414	110.7
40	1025	-	-	735	-	-	290	-	-
41	1259	2284	99.7	967	1702	88.8	292	582	155.6
42	1355	-	-	1071	-	-	284	-	-
43	669	2024	88.4	413	1484	77.4	256	540	144.4
44	818	-	-	645	-	-	173	-	-
45	523	1341	58.5	361	1006	52.5	162	335	89.6
46	327	-	-	219	-	-	108	-	-
47	255	582	25.4	168	387	20	87	195	52.1
48	181	-	-	116	-	-	65	-	-
49	167	348	15.2	116	232	12.1	51	116	31.0
50	150	-	-	103	-	-	47	-	-
51	163	313	13.7	116	219	11.4	47	94	25.1
52	127	-	-	103	-	-	24	-	-
53	85	212	9.3	77	180	9.4	8	32	8.6
54	72	-	-	52	-	-	20	-	-
55	13	85	3.7	13	65	3.4	-	20	5.3
56	2	-	-	-	-	-	2	-	-
57	23	25	1.1	13	13	0.7	10	12	3.7
58	4	-	-	-	-	-	4	-	-
59	4	8	0.3	-	-	-	4	8	2.1
60	-	-	-	-	-	-	-	-	-
61	-	-	-	-	-	-	-	-	-
62	4	-	-	-	-	-	4	-	-
63	-	4	0.2	-	-	-	-	4	1.1
64	-	-	-	-	-	-	-	-	-
65	-	-	-	-	-	-	-	-	-
66	13	-	-	13	-	-	-	-	-
67	-	13	0.7	-	13	0.7	-	-	-
68	-	-	-	-	-	-	-	-	-
69	2	2	0.1	-	-	-	2	2	0.5
Total 22.906				19.166			3.740
Weigth (catches) 31.200				(Catches)28.230			2.970
I 36.9				36.5			39.3
W 1.4				1.5			0.9

TABLE : 14 PORTUGUESE STUDIES IN CECAF AREA FAO 34 1982 Rubberlip Grunt - Plectorhincus mediterraneus

Length/Weight relationship

Length cm	No of fishes	Total Weight(N)		Log_10^e	Log₁₀W
26	3	550	183	1.41	2.26
27	8	1800	225	1.43	2.35
28	14	3450	246	1.45	2.39
29	34	9850	290	1.46	2.46
30	44	15475	352	1.48	2.55
31	55	23050	419	1.49	2.62
32	76	35750	470	1.51	2.67
33	109	58450	536	1.57	2.73
34	90	53100	590	1.53	2.77
35	115	76200	663	1.54	2.82
36	116	84700	730	1.56	2.86
37	124	96000	774	1.57	2.89
38	104	87400	840	1.58	2.92
39	97	86300	890	1.59	2.95
40	97	91000	938	1.60	2.97
41	81	81850	1011	1.61	3.00
42	79	86160	1091	1.62	3.04
43	47	52900	1123	1.63	3.05
44	50	60450	1209	1.84	3.08
45	45	57650	1281	1.65	3.11
46	32	46550	1455	1.66	3.16
47	20	30550	1528	1.67	3.18
48	11	18450	1677	1.68	3.22
49	18	32400	1800	1.69	3.26
50	17	32000	1882	1.70	3.27
51	15	29650	1977	1.71	3.30
52	8	16450	2056	1.72	3.31
53	4	8750	2188	1.72	3.34
54	5	12000	2400	1.73	3.38
55	-	-	-	-	-
56	-	-	-	-	-
57	4	30850	2713	1.76	3.43
58	2	50	2550	1.76	3.41
59	2	5850	2925	1.77	3.47
60	-	-	-	-	-
61	-	-	-	-	-
62	3	9600	3700	1.79	3.51
69	2	7000	3500	1.84	3.54
Total	533	1328,185 kg

Table 15

Portuguese studies in CECAF AREA

Rubberlip grunt (Plectorhinchus mediterraneus) (Age/length) *

Age L(Cm)	1	2	3	4	5	6	> 6	TOTAL
21
23
5	11	1						12
7	22	15						37
9	12	50	3					65
31		58	16					74
3		13	20	1				34
5		12	34	5				51
7			24	21				45
9			18	28	6			52
41			1	28	26	1		56
3				18	33	11		62
5				12	44	11	1	68
7				16	35	14	1	66
9				8	33	41	4	86
51				1	14	12	13	40
3				1	11	24	8	44
5					3	19	10	32
7						13	7	20
9						6	9	15
61						1	1	2
3							5	5
5							3	3
7							4	4
9							3	3
71							2	2
3
5
7
№	45	149	116	139	205	153	71	878
%	5.1	17.0	13.2	15.8	23.3	17.4	8.1	90.9

* Age determination by otoliths

FIG. 1 - - PORTUGUESE TRAWL FISHERY IN CECAF AREA 1981, 82, 83 Make landings (Merluccius spp.) - 2 cm classes. %

FIG. 2 - PORTUGUESE TRAWL FISHERY IN CECAF AREA 1975 –1983 Total and hakes landings and fishing effort

FIG 3 - PORTUGUESE “ARTISANAL” MAKE FISHERY IN CECAF AREA 1982 (Line and gill nets) Length composition of hakes landed by artisanal boats Sampling on fishing port, °/oo

FIG. 4 - PORTUGUESE FISHERY IN CECAF AREA - (DIV. 34.1.1 MAINLY) 1981

Hake (Merluccius spp.) line fishery - Sampling on fishing port Length composition, °/oo

FIG. 5 - PORTUGUESE GILL NET FISHERY IN CECAF AREA 1982 OBSERVATIONS CARRIED OUT ON BOARD A COMMERCIAL SHIP - Div. 34.3.1 Hake catches (M. merluccius, M. senegalensis), %

FIG. 6 - PORTUGUESE TRAWL FISHERY IN CECAF AREA - 1981, 1982, 1983 Length composition (landings) of Rubberlip grunt (Plectorhinchus mediterraneus), °/oo

FIG. 7 - PORTUGUESE STUDIES IN CECAF AREA 1982 Length composition of Rubberlip grunt (Plectorhinchus mediterraneus) Gill nets landings Sampling on fishing port (N° of fished, °/oo

FIG 8 - PORTUGUESE STUDIES IN CECAF AREA ON BOARD A TRAWLER APRIL-MAY 1982 Length composition (catches) on Rubberlip grunt - Plectorhinchus mediterraneus, °/oo

FIG 9 - PORTUGUESE STUDIES IN CECAF AREA - APRIL, MAY 1982 Observations on board a trawler in Divisions 34.1.3 and 34.3.1 Length composition of Bluespotted seabream - Sparus coeruleostictus, °/oo

FIG.10 - PORTUGUESE STUDIES IN CECAF AREA - 1982 Rubberlip grunt - Plectorhinchus mediterraneus Length/weight relationship

FIG.11 - PORTUGUESE STUDIES IN CECAF AREA - 1982 Rubberlip grunt - Plectorhinchus mediterraneus Length/weight relationship (log.)