# Study of the spatial variability of marine pollution around the peninsula of Cape Verde

Yoba Kande, Patrice Brehmer, Guillaume Constantin De Magny, Amy Gassama Sow, Amidou Sonko, Aba Diop, Luc Finot, Cissé Ibrahima, Massal Fall, Oumar Sadio, et al.

► To cite this version:

Yoba Kande, Patrice Brehmer, Guillaume Constantin De Magny, Amy Gassama Sow, Amidou Sonko, et al.. Study of the spatial variability of marine pollution around the peninsula of Cape Verde. Ecosystem Approach to the management of fisheries and the marine environment in the West African Waters; 3rd ICAWA, Sub Regional Fisheries Commission; IRD, Dec 2016, Dakar (Sénégal), Senegal. pp.81-82. hal-04488074

HAL Id: hal-04488074

https://hal.science/hal-04488074v1

Submitted on 4 Mar 2024

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Public Domain
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Commission Sous-Régionale des Pêches
Sub-Regional Fisheries Commission

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International Conference
ICAWA 2016
Extended book of Abstract

THE AWA PROJECT
Ecosystem Approach
to the management
of fisheries and the
marine environment
in West African waters

ISBN: 978-2-9553602-0-5

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Bundesministerium
für Bildung
und Forschung

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Trilateral German-French-African research initiative
**EDITED BY:**

Patrice BREHMER (IRD-France; Dakar), Babacar BA (CSRP, Sub-Region; Banjul) & Gerd KRAUS (TI, Germany; Hamburg).

**TECHNICAL SUPPORT:** Marie Madeleine GOMEZ (CSRP), Ndague DIOGOUL (IRD-UCAD).

**WITH THE COLLABORATION OF:**

Bamol Ali SOW, Alban LAZAR, Heino FOCK, Xavier CAPET, Aka Marcel KOUASSI, Idrissa Lamine BAMY, Osvaldina SILVA, Eric MACHU, Vamara KONE, Moustapha DEME, Didier JOUFFRE, Joern SCHIMDT, Modou THIAW, Suzanne TRAORE, Abdoulaye DIOP, Justine DOSSA, Didier JOUFFRE, Ibrahima DIALLO, Arnaud COMOLET, Zacharie SOHOU, Hamet DIADHOU, Célestin BLE, Rafael ALMAR, Moussa SALL, Abou BAMBA, Dano J.A. ROELVINK, Ibrahima LY, Marie BONNIN, Dienaba Beye TRAORE, Adama MBAYE, Hassane Dedah FALL, Mohamed M'barek O. SOUEILIM.

**ISBN:** 978-2-9553602-0-5

Sub Regional Fisheries Commission / Commission Sous Régionale des Pêches ©2017

**COVER DESIGN:** AWA (BMBF - IRD) project

**LOGO AND FLYERS:** Laurent CORSINI (IRD)

**TRANSLATION:** Amadou NDIONE (independent)

**SPONSORS ICAWA 2016**

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giz

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Empowered lives.
Resilient nations.

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UNION EUROPEENNE

IRD
Institut de Recherche
pour le Développement
FRANCE

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NEPAD
TRANSFORMING AFRICA

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GREENPEACE
# Study of the spatial variability of marine pollution around the peninsula of Cape Verde

Yoba KANDE<fnref n="1" />*, Patrice BREHMER<fnref n="2" />, Guillaume Constantin DE MAGNY<fnref n="3" />,<fnref n="4" />, Amy GASSAMA<fnref n="4" />,<fnref n="5" />, Amidou SONKO<fnref n="6" />, Aba DIOP<fnref n="1" />, Luc FINOT<fnref n="7" />, IBRAHIMA CISSE<fnref n="8" />,<fnref n="9" />, Massal FALL<fnref n="8" />, Oumar SADIO<fnref n="2" />, Mariline DIARA<fnref n="10" />, OUSMANE DIANKHA<fnref n="11" />, and François GALGANI<fnref n="12" />

## Abstract

Marine pollution, the scourge of modern times, is due to the runoff of domestic and industrial waters as well as to various anthropogenic activities, i.e. products and objects deliberately or accidentally discharged into the sea. The samples taken from 11 sites on the Cap-Vert peninsula in Senegal, indicate the presence of certain polluting substances in varying amounts. The objective of this work is to study the correlations between the physical, microbiological and chemical parameters in order to highlight the similarities between the sites and, if possible, to determine the most relevant parameter(s) to characterize the pollution. PCA results have shown that some sites appear to be less chemically polluted than others that are more polluted with eutrophication and chemicals (e.g., copper, mercury). From a physical point of view, for example, we observe that the characteristics of sediments (large silt, clays, fine silt) are related to certain chemical parameters. The AFC performed between the overall toxicity of the sediments and the microbiological quality of the water shows that the site of

<footnote n="1">¹ Université Alioune Diop de Bambey (UADB), département mathématique, Bambey, Sénégal</footnote>

<footnote n="2">²Institut de Recherche pour le Développement (IRD), UMR 195 Lemar, BP1386, Dakar, Sénégal</footnote>

<footnote n="3">³ Institut de Recherche pour le Développement (IRD), UMR MIVEGEC, Dakar, Sénégal</footnote>

<footnote n="4">⁴ Institut Pasteur de Dakar (IPD), 36, Avenue Pasteur Dakar, Sénégal</footnote>

<footnote n="5">⁵ Université Cheikh Anta Diop de Dakar (UCAD), Ecole Supérieure Polytechnique, Dakar, Sénégal</footnote>

<footnote n="6">⁶ Université Cheikh Anta Diop de Dakar (UCAD), Faculté de Médecine Pharmacologie et Odontologie, Dakar, Sénégal</footnote>

<footnote n="7">⁷ Institut de Recherche pour le Développement (IRD), US191 IMAGO, Laboratoire des Moyens Analytiques, Campus ISRA-IRD de Bel Air, Dakar, Sénégal</footnote>

<footnote n="8">⁸ Institut Sénégalais de Recherches Agricoles (ISRA), Centre de Recherches Océanographiques de Dakar Thiaroye (CRODT), BP 2241, Dakar, Sénégal</footnote>

<footnote n="9">⁹ Greenpeace, 2, Avenue Hassan II, 6ème Etage Dakar, Sénégal</footnote>

<footnote n="10">¹⁰ Ministère de l'environnement et du développement durable (MEDD), Direction de l'Environnement et des Etablissements Classés (DEEC), 106, Rue Carnot-BP 6557, Dakar, Sénégal</footnote>

<footnote n="11">¹¹ Ministère de l'environnement et du développement durable (MEDD), Direction des Aires Marines Communautaires Protégées, Hann-Dakar, Sénégal</footnote>

<footnote n="12">¹² Ifremer, Zoning Industriel Furiani, 20600 Bastia, Corse, France</footnote>

<footnote>*Correspondance: Tél: (221) 33 832 89 95; Courriel: yobakande@gmail.com (Y. KANDE)</footnote>
Ouakam has a medium toxicity and a good microbiological quality while that of Cambérène and the Vivier are characterized respectively by bad and good quality but also by low toxicity at both sites. The two sites of Hann (Hann1 and Hann2), Soumbédioune, Ngor, Yoff Tonghor and Dakar Le Kantec are characterized by high toxicity and poor microbiological quality. Those in the Madeleine Islands and the Port of Dakar are characterized by high toxicity and bad microbiological quality. Moreover, as expected Soumbédioune appears as the most polluted sites in terms of microbiological load. The interest of the multivariate approach (ACP and AFC) is then discussed in this type of analysis.

**Keywords:** waste water, global sediment toxicity, trace metal, microbiology, Cap-Vert peninsula, Senegal.
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## 'AWA' PROJECT

Build the
foundation of
a West African
observatory.

Create a sub-
regional task force
on the ecosystem
approach to the
management
of fisheries and
the marine
environment in
West African waters
under the effect of
climate change

**Edited by:** Patrice Brehmer
(IRD), Babacar BA (CSRP) &
Gerd KRAUS (TI).

**With the collaboration of:**
Marie Madeleine Gomez,
Ndague Diogoul, Bamol A.
Sow, Alban Lazar, Heino
Fock, Xavier Capet, Aka
Marcel Kouassi, Idrissa
Lamine Bamy, Osvaldina
Silva, Eric Machu, Vamara
Koné, Moustapha Deme,
Didier Jouffre, Joern
Schimdt, Modou Thiaw,
Suzanne Traoré, Abdoulaye
Diop, Justine Dossa, Didier
Jouffre, Ibrahima Diallo,
Arnaud Comolet, Zacharie
Sohou, Hamet Diadhou,
Célestin Ble, Rafael Almar,
Moussa Sall, Abou Bamba,
Dano J.A. Roelvink, Ibrahima
Ly, Marie Bonnin, Dienaba
Beye Traoré, Joern Schmidt,
Adama Mbaye, Hassane
Dedah Fall, Mohamed
M'barek O. Soueilim.

ISBN: 978-9553602-0-05

SRFC/CSRP - IRD ©2017

Cover design AWA project

Logo and flyers: Laurent

Corsini (IRD)

**Sponsors** ICAWA 2016

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Institut de Recherche
pour le Développement
FRANCE

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coopération
allemande
DEUTSCHE ZUSAMMENARBEIT

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Empowered lives.
Resilient nations.

<figure><img src="image_16.png" /></figure>

UNION EUROPEENNE

<figure><img src="image_17.png" /></figure>

GREENPEACE

<figure><img src="image_18.png" /></figure>

NEPAD

TRANSFORMING AFRICA

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9 789553 602005