Pêcheries maritimes, écosystèmes et sociétés en Afrique de l’Ouest: un demi-siècle de change...
This presentation is the property of its rightful owner.
Sponsored Links
1 / 25

The Spanish fisheries along the West African coast from the middle to the end of the 20th century PowerPoint PPT Presentation


  • 100 Views
  • Uploaded on
  • Presentation posted in: General

Pêcheries maritimes, écosystèmes et sociétés en Afrique de l’Ouest: un demi-siècle de changement Dakar, Sénégal, 24 – 28 juin 2002. The Spanish fisheries along the West African coast from the middle to the end of the 20th century Eduardo Balguerías Guerra María Teresa García Santamaría

Download Presentation

The Spanish fisheries along the West African coast from the middle to the end of the 20th century

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


The spanish fisheries along the west african coast from the middle to the end of the 20th century

Pêcheries maritimes, écosystèmes et sociétés en Afrique de l’Ouest: un demi-siècle de changementDakar, Sénégal, 24 – 28 juin 2002

The Spanish fisheries along the West African coast from the middle to the end of the 20th century

Eduardo Balguerías Guerra

María Teresa García Santamaría

Ana Ramos Martos

Ignacio Sobrino Yraola

Lourdes Fernández Peralta

Teresa García Jiménez

Instituto Español de Oceanografía


The spanish fisheries along the west african coast from the middle to the end of the 20th century

OUTLINE

  • Historical antecedents

  • IEO statistical surveys in Spanish landing ports (1932 - 1970)

  • Establishment of the IEO program on African fisheries (1974)

  • Evolution of the Saharan fishery (1932 – 1999)

  • Conclusions


The spanish fisheries along the west african coast from the middle to the end of the 20th century

SOME PIECES OF HISTORY

  • Available information until the 17th century

    • Phoenician and Roman vestiges show the fishing tradition in the south of the Iberian peninsula

    • Information on disperse documents demonstrate that Iberians fished sardine and hake in the coast of Morocco

    • During the 15th century Portuguese explored the African coast down to Guinea and brought news on the richness of the Saharan coast

    • Spanish conquered the Canary Islands and started exploiting Saharan resources

    • Treaty of Tordesillas recognised the rights of Spanish fishermen to fish between Capes Ghir and Bojador

    • Pirate attacks isolated the region north to Cape Ghir and permitted the extension of Canarian fishermen from Cape Juby to Cape Timiris (“banco canario – sahariano”)


The spanish fisheries along the west african coast from the middle to the end of the 20th century

SOME PIECES OF HISTORY

  • Available information until 15th century

  • The Illustration period: first descriptions of the African fisheries

    • 30 boats

    • use of hooks exclusively

    • “tasarte”, “anjova” and “estornino” as bait

    • “cherne”, “corvina” and “sama” as target species

    • preservation gutted, salted and pressed

    • annual production around 6 900 t (3 million fish)


The spanish fisheries along the west african coast from the middle to the end of the 20th century

SOME PIECES OF HISTORY

  • Available information until 15th century

  • The Illustration period: first descriptions of the African fisheries

  • The colonialism: scientific explorations

    • introduction of nets and traps: “chinchorros”, “artes de tendido” and “nasas”

    • preservation of living fish in “tank vessels”

    • factories onshore


The spanish fisheries along the west african coast from the middle to the end of the 20th century

SOME PIECES OF HISTORY

  • Available information until 17th century

  • The Illustration period: first descriptions of the African fisheries

  • The colonialism: scientific explorations

  • The World War Two: expansion of industrial fisheries

    • introduction of trawling

    • specialization of fishing (small pelagics, hakes, shrimps, cephalopods)

    • new preservation methods (ice and freezing)

    • extension of fishing grounds towards the south


The spanish fisheries along the west african coast from the middle to the end of the 20th century

SOME PIECES OF HISTORY

  • Available information until 17th century

  • The Illustration period: first descriptions of the African fisheries

  • The colonialism: scientific explorations

  • The World War Two: expansion of industrial fisheries

  • The new jurisdictional order: decolonisation, EEZ’s and fishing agreements


The spanish fisheries along the west african coast from the middle to the end of the 20th century

Catches by fishing area

300000

Guinea

Guinea Bissau

250000

Senegal

Mauritania

200000

Sahara

Morocco

catch (t)

150000

100000

50000

0

33

43

53

63

73

83

93

years


The spanish fisheries along the west african coast from the middle to the end of the 20th century

20000

15000

catch (t)

10000

5000

0

70

300000

years

0

30000

33

8000

0

80

0

80

5000

7000

0

0

80

80


The spanish fisheries along the west african coast from the middle to the end of the 20th century

Effort by fishing area

120000

Guinea

Guinea Bissau

100000

Senegal

Mauritania

80000

Sahara

Morocco

effort (fishing days)

60000

40000

20000

0

70

72

74

76

78

80

82

84

86

88

90

92

94

96

98

00

years


The spanish fisheries along the west african coast from the middle to the end of the 20th century

Composition of fish catches

120000

100000

80000

catches (t)

60000

40000

20000

0

33

37

41

45

49

53

57

61

65

69

73

77

81

85

89

93

97

years

Haemulidae

Pleuronectiforms

Sciaenidae

Sparidae

Serranidae

Other fishes

Cephalopods


The spanish fisheries along the west african coast from the middle to the end of the 20th century

Relative abundance in cruises

THALASSA - 1962

CIERZO - 1942

0,08

6,83

2,88

0,42

0,54

16,78

(2175 kg/60’)

0,01

(569 kg/60’)

80,32

92,12

ATLOR V - 1974

CONGEL - 1990

11,33

9,64

9,61

(211 kg/60’)

18,7

0,86

(322 kg/60’)

71,66

78,2

Fish

Crustaceans

Cephalopods

Equinoderms

Other invertebrates


The spanish fisheries along the west african coast from the middle to the end of the 20th century

1972

Invertebrates

Osteichthies

Chondroichthies

Cephalopods

0

10

20

30

40

50

60

70

80

percentage (weight)

1990

biomass

catches

landings

Invertebrates

Osteichthies

Chondroichthies

Cephalopods

0

10

20

30

40

50

60

70

80

percentage (weight)


The spanish fisheries along the west african coast from the middle to the end of the 20th century

CONCLUSIONS

  • First historical records indicate that Spanish fisheries in NW Africa were already established in the early Mean Age

  • Canarian fishermen exploited resources in the Saharan coast almost in exclusivity from the 15th to the 20th centuries

  • World War Two favoured the establishment of specialized industrial fisheries in the region

  • The new jurisdictional order forced to the extension of traditional fishing grounds

  • Spanish catches and effort reached their maximum during the 1980’s followed by a continuous decrease due to restrictions in fishing agreements

  • Available information suggests that temporal changes in the Saharan assemblages affected to the total biomass more than to the faunistic composition


  • Login