APPENDIXES/ANNEXES

APPENDIX/ANNEXE A
List of participants/Liste des participants

GAMBIA/GAMBIE

MBYE, Ebou Mass
Fisheries Department
6, Marina Parade
Banjul
Tel: (220) 227339
Fax: (220) 224154
E-mail:[email protected]

TAMOH, Solomon
Fisheries Department
6, Marina Parade
Banjul
Tel: (220) 227339
Fax: (220) 224154

MAURITANIA/MAURITANIE

O SIDINA, Ebaye
IMROP
BP 22
Nouadhibou
Tel: (222) 5745124
Fax: (222) 5745081
E-mail: [email protected]
             [email protected]

OULD CHEIKH, Nema
IMROP
BP 22, Nouadhibou
Tel: (222) 5745124
Fax: (222) 5745081

MOROCCO/MAROC

CHBANI IDRISSI, Mostafa
Institut National de Recherches
Halieutiques (INRH)
2, Rue Tiznit
Casablanca 20000
Tel: (212) 22 22 02 49
Fax: (212) 26 69 67
E-mail: [email protected]
            [email protected]

CHAROUKI, Najib
Institut National de Recherches Halieutiques (INRH)
2, Rue Tiznit
Casablanca 20000
Tel: (212) 22 22 02 49
Fax: (212) 26 69 67
E-mail: [email protected]

SENEGAL/SÉNÉGAL
SAMB, Birane
CRODT
BP 2241
Dakar
Tel: (221) 834 80 41
Fax: (221) 834 2792
E-mail: [email protected]
             [email protected]

SARRE, Abdoulaye
CRODT
BP 2241
Dakar
Tel: (221) 834 80 41
Fax: (221) 834 2792
E-mail: [email protected]
             [email protected]

ORGANIZATIONS/ORGANISATIONS

IMR

KRAKSTAD, Jens Otto
IMR
P.O. Box 1870
Nordes N.5817
Bergen
NORWAY
Tel: (47) 55 23 85 00
       (47) 55 23 85 74
Fax: (47) 55 23 85 79
E-mail: [email protected]

FAO

TANDSTAD, Merete
FAO
Viale delle Terme di Caracalla
00100 Rome
Tel: (39) 06 57052019
Fax: (39) 06 57053020
E-mail: [email protected]

APPENDIX/ANNEXE B
Agenda/Ordre du jour

1. Welcome

2. Review of results and experiences from 2003

   -   R/V ITAF DÈME

   -   R/V AL-AWAM and AMRIGUE

   -   R/V AL AMIR MOULAY ABDALLAH

   -   R/V DR. FRIDTJOF NANSEN

Discussion

3. Presentation of format of survey reports

   -   R/V ITAF DÈME

   -   R/V AL-AWAM and AMRIGUE

   -   R/V AL AMIR MOULAY ABDALLAH

   -   R/V DR. FRIDTJOF NANSEN

Discussion

4. Common format for survey reports

5. Standardisation of methods

   -   Age reading (report on progress made)

   -   Trawl sampling (catch and biological)

   -   Scrutinising of echograms (preparation of “standard” echograms for main species)

Discussion

6. Surveys planned for 2004

   -   R/V ITAF DÈME

   -   R/V AL-AWAM and AMRIGUE

   -   R/V AL AMIR MOULAY ABDALLAH

   -   R/V DR. FRIDTJOF NANSEN

Discussion

7. Planning of calibration of acoustic equipment and Intercalibration
8. Parallel survey by local research vessels and R/V DR. FRIDTJOF NANSEN
9. Acoustic abundance research
10. Identification of training needs and possible activities
11. Planning Group Report (to be prepared by chairman and presented to the small pelagic Working Group)
12. Closure

APPENDIX/ANNEXE C
Summary of results of surveys in 2003/Résumé des résultats des campagnes 2003

(A) SUMMARY SHEET FOR PELAGIC SURVEYS R/V ITAF DÈME 2003

Country: Senegal
Research vessel: ITAFDÈME
Surveynumber: 01
Number of days: 7
General objectives: to adjust the pelagic trawl and training to catch sardinella

Cruise leader: Abdoulayé Sarre
Participating scientists/technicians: A. Sarre, Atle Sangolt (Norway), Asbjørn Aasen (Norway), Ibrahima Sow, Mor Sylla

Summary of results:
The pelagic trawl has provided encouraging results. The Norwegian experts have given directives concerning their use and acoustic surveys are now foreseeable in the near future.

Report:
Final report
Reference: Mission report ID 01-03-“Evaluation test of the pelagic trawl”

Constraints/Comments:
Difficulty in changing trawl (from pelagic to demersal or vice versa) based on what is detected, the operation being long and tiresome due to panel replacement.

Survey number: 02
Number of days: 16
General objectives: to estimate the biomass and map the distribution of pelagic fish stocks off Senegal and Gambia by acoustic methods and study the main environmental parameters

Cruise leader: Abdoulayé Sarre
Participating scientists/technicians: A. Sarre, Ibrahima Sow, Mor Sylla, Cheikh N'Dour, Serigne Sylla, Madiabel Diop, Alassane Sylla, Moussa Biagui.

Summary of results:
The results show a strong presence of sardinella during this season. Of a total biomass (all species combined) estimated at around 1 014 000 tonnes, 30 percent is made up of flat sardinella and 14 percent of round sardinella. This last species is found on the Northern coast, only traces being registered in the South.

Horse mackerel is present along the whole coast and predominantly on the “petite côte”, whereas chub mackerel are more concentrated around Casamance during this season.

Table: Estimated abundance of main pelagic species (in thousands of tonnes)

Report:
Final report
Reference: Mission report ID 02–03- “Acoustic survey of small pelagic fish stocks along the Senegalese continental shelf during the cold season”

Constraints/Comments:
Difficulty in changing trawl (from pelagic to demersal or vice versa) based on what is detected, the operation being long and tiresome due to panel replacement.

Use of the B1500 software poses some problems: as the program does not take into account changes in the operating scales of the EK60 sounder.

(B) SUMMARY SHEET PELAGIC SURVEYS AL-AWAM 2003

Country: Mauritania
Research vessel: AL-AWAM
Survey number: 01
Number of days: 15
General objectives: to estimate the biomass and map the distribution of pelagic fish stocks off Mauritania by acoustic methods and study the main environmental parameters

Cruise leader: Ebaye Sidina
Participating scientists/technicians: Ahmedou Ould Mohamed El Moustapha, Ahmed Diagne, M'Bodj, Cheikh Baye
Other participants: Ad Corten, Remment ter Hofstede, Alexeï, Dutch electronic engineer

Summary of results: Estimation of biomass by principal components
Distribution of maps of the species groups
A strong recruitment of pelagic species in relation to the bodies of water which were colder than the seasonal average
Replacement of the screen in the EK500 and installation of an inverter to stabilise the electricity supply of the devices used in the acoustic PC

Report:
Preliminary Report

Constraints/Comments:
Difficulty to trawl in depths of less than 20 m
Failure of the CTD to understand the vertical structure of the bodies of water

Country: Mauritania
Research vessel: AL-AWAM
Survey number: 02
Number of days: 05
General objectives: Methodology survey (trawling) in the Northern zone

Cruise leader: Ahmedou Ould Mohamed El Moustapha

Participating scientists/technicians: Ad Corten, Alexei Goutchine, Sidi Yahya, Mohamed Ahmed, Diallo Ibra, Cheikh Diop, Cheikh Diop, Jemal Ould Abed

Summary of results:
Estimation of the biomass of the main pelagic species in the Northern Mauritanian zone
Day and night comparison

Report:
Preliminary report

Constraints/Comments: None reported

(C) SUMMARY SHEET PELAGIC SURVEYS Al AMIR MOULAY ABDALLAH 2003

Country: Morocco
Research vessel: AL AMIR MOULAY ABDALLAH
Surveynumber: 01
Number of days: 4
General objectives: Acoustic practical training onboard

Cruise leader: A. Johanesson
Participating scientists/technicians: 6 Moroccans: (4 scientists+2 technicians) 8 Foreigners: (2 Mauritanians+2 Senegalese+2 Tunisians+1 Gambian+1Guinean)
Summary of results: Practice on board:
- EK 60 functions
- Calibrating exercises
- Equipment maintenance
- Survey planning
- Catch sampling

Report:
Report of the acoustic seminar, Agadir 19 to 27 February 2003 (final report)

Constraints/Comments:
Short time to perform all topics (need follow up in future)

Country: Morocco
Research vessel: AL AMIR MOULAY ABDALLAH
Survey number: 02
Number of days: 03
General objectives: Check acoustic equipment before dry-docking

Cruise leader: M. Chbani
Participating scientists/technicians: 2 Japanese experts
Summary of results: Acoustic equipment working well
Running ADCP

Report:
Preliminary report

Constraints/Comments:
Need Sonar modem, Ethernet & GMDSS communication for internet

Country: Morocco
Research vessel: AL AMIR MOULAY ABDALLAH
Surveynumber: 03
Number of days: 10
General objectives: Vessel performances

Cruise leader: M. Chbani
Participating scientists/technicians:
2 experts, 2 scientists and 2 technicians
Summary of results:

Report:
Preliminary report

Constraints:

Country: Morocco
Research vessel: AL AMIR MOULAY ABDALLAH
Surveynumber: 04
Number of days: 10
General objectives: to estimate the biomass and map the distribution of pelagic fish stocks from Cap Juby to Cap Ghir. Intercalibration with R/V DR. FRIDTJOF NANSEN

Cruise leader: H. Chfiri
Participating scientists/technicians:
4 scientists and 2 technicians
Summary of results: Not yet carried out
Report: (Status: preliminary/final; Reference)
Constraints:

(D) SUMMARY SHEET PELAGIC SURVEYS R/V DR FRIDTJOF NANSEN 2002

Country: Norway/FAO
Research vessel: DR. FRIDTJOF NANSEN
Survey number: 12
Number of days: 53
General objectives: Survey of pelagic resources: sardine, sardinella, anchovy and horse mackerel. Environmental studies, CTD oxygen, ADCP.

Cruise leader: Tore Strømme, Reidar Toresen

Summary of results:

• Mapped the distribution and estimated the biomass of sardine (Sardina pilchardus), sardinella (Sardinella aurita), (S. maderensis), chub mackerel (Scomber japonicus), horse mackerel (Trachurus trachurus), (T. trecae) and anchovy (Engraulis encrasicolus) using hydroacoustic methods.
• Collected biological data on all target species and otoliths of sardine and anchovy for later reading ashore.
• Environmental monitoring: Continuous recording of sea surface and air temperature, wind strength and direction and sun irradiation. Sampled standard hydrographical transects for temperature, salinity and oxygen.

Report:
Final reports available

Constraints/Comments:

(E) SUMMARY SHEET PELAGIC SURVEYS R/V DR. FRIDTJOF NANSEN 2003

Country: Norway/FAO
Research vessel: DR. FRIDTJOF NANSEN
Surveynumber: 7
Number of days: 52
General objectives: Survey of pelagic resources: sardine, sardinella, anchovy and horse mackerel. Environmental studies, CTD oxygen, ADCP.

Cruise leader: Tore Strømme, Reidar Toresen

Summary of results:

• Mapped the distribution and estimated the biomass of sardine (Sardina pilchardus, sardinella (Sardinella aurita), (S. maderensis), chub mackerel (Scomber japonicus), horse mackerel (Trachurus trachurus), (T. trecae) and anchovy (Engraulis encrasicolus) using hydroacoustic methods.
• Collected biological data on all target species and otoliths of sardine and anchovy for later reading ashore.
• Environmental monitoring: Continuous recording of sea surface and air temperature, wind strength and direction and sun irradiation. Sampled standard hydrographical transects for temperature, salinity and oxygen.

Report:
Final reports distributed during the Working Group meeting in Dakar 28 October 2003.

Constraints/Comments:
Project no. and% share:                 9518.13       100 %                 NAN-SIS project: W3

Country: Norway/FAO
Research vessel: DR. FRIDTJOF NANSEN
Surveynumber: 12
Number of days: 52
General objectives: Survey of pelagic resources: sardine, sardinella, anchovy and horse mackerel. Environmental studies, CTDO, ADCP.

Cruise leader: Tore Strømme, Jens-Otto Krakstad

Summary of results:

• Mapped the distribution and estimated the biomass of sardine (Sardina pilchardus), sardinella (Sardinella aurita), (S. maderensis), chub mackerel (Scomber japonicus), horse mackerel (Trachurus trachurus), (T. trecae) and anchovy (Engraulis encrasicolus) using hydroacoustic methods.
• Collected biological data on all target species and otoliths of sardine and anchovy for later reading ashore.
• Environmental monitoring: Continuous recording of sea surface and air temperature, wind strength and direction and sun irradiation. Sampled standard hydrographical transects for temperature, salinity and oxygen.

Report:

Constraints/Comments:
Project no. and% share:               9518.13           100 %                NAN-SIS project: W3

APPENDIX/ANNEXE D
Format of survey reports/Format des rapports de campagne

(A) R/V ITAF DÈME report format:

SUMMARY

1. INTRODUCTION
1.1 Mission objectives
1.2 Participants
1.3 Schedule
1.4 Development of the mission
1.5 Equipment used

2. METHODOLOGY
2.1 Physical sampling
2.2 Biological sampling
2.3 Acoustic sampling

3. RESULTS
3.1 Hydrography
3.2 Estimation of biomasses
      3.2.1 Northern coast
      3.2.2 Small coast
      3.2.3 Casamance

4. CONCLUSIONS

BIBLIOGRAPHY

ACKNOWLEDMENTS

Annex I    Results of the fishing operation
                Length frequencies
Annex II   Distribution maps of the biomass
Annex III  Calibration results

(B) R/V AL-AWAM report format:

Summary

CHAPTER 1: INTRODUCTION

1.1 Objectives
1.2 Participants
1.3 Development of the survey
1.4 Acoustic system
1.5 Sampling strategy
1.6 Identification method
1.7 Stratification
1.8 Biomass estimation methodology

CHAPTER 2: RESULTS

2.1 Hydrology
2.2 Distribution and abundance of pelagic fish
2.3 Biomass estimation of fish type D1
2.4 Distribution and abundance of pelagic fish type D2
2.5 Biomass estimation of fish type D2

CONCLUSIONS

ANNEX I:     Biomass characteristics by number and weight-length ratio

ANNEX II:    Fishery report

ANNEX III:   Description of the instruments and fishing device used

(C) R/V AL AMIR MOULAY ABDALLAH report format

TABLE OF CONTENTS

CHAPTER 1 INTRODUCTION
1.1      Mission objectives
1.2      Participants
1.3      Operational development
1.4      Equipment and methodologies

CHAPTER 2 SURVEY RESULTS
2.1      Environment (Hydrography …)
2.2      Distribution and abundance between Safi and Tangier
2.3      Distribution and abundance between Tangier and Saidia
2.4      Biomass estimation by length class

CHAPTER 3 CONCLUSIONS
3.1      Current state of stocks/fisheries
3.2      Trends in pelagic stocks
3.3      Forecasts and recommendations

Annex I      Biomasses and length frequencies of the main species

Annex II     Trawl parameters and catch data

Annex III     Acoustic settings and fishing techniques

APPENDIX/ANNEXE E
Overview of all 2003 surveys/Examen de toutes les campagnes 2003

APPENDIX/ANNEXE F
Summary plans for pelagic surveys in 2004/
Plans récapitulatifs pour les campagnes pélagiques 2004

(A) SUMMARY PLAN (PRELIMINARY) FOR PELAGIC SURVEYS R/V ITAF DÈME

Country: Senegal
Research vessel: ITAF DÈME
Survey number: 01
Number of days: 15
General objectives: To estimate the biomass and map the distribution of pelagic fish stocks off Senegal and TheGambia by acoustic methods and study the main environmental parameters.

Cruise leader: A. Sarre
Participating scientists/technicians: Not yet decided

Country: Senegal
Research vessel: ITAF DÈME
Survey number: 02
Number of days: 15
General objectives: To estimate the biomass and map the distribution of pelagic fish stocks off Senegal and theGambia by acoustic methods and study the main environmental parameters to intercalibrate with R/V DR. FRIDTOF NANSEN by conducting a parallel survey.

Cruise leader: A. Sarre
Participating scientists/technicians: Not yet decided

(B) SUMMARY PLAN (PRELIMINARY) FOR PELAGIC SURVEYS R/V AL-AWAM

Country: Mauritania
Research vessel: AL-AWAM
Survey number: 01
Number of days: 18
General objectives: To estimate the biomass and map the distribution of pelagic fish stocks off Mauritania by acoustic methods and study the main environmental parameters

Cruise leader: Ebaye Sidina
Participating scientists/technicians: Ahmedou Ould Mohamed El Moustapha, Ahmed Diagne, M'Bodj
Other participants: Ad Corten, Remment Ter Hofstede, Alexeï, Dutch electronics engineer

Country: Mauritania
Research vessel: AL-AWAM
Survey number: 02
Number of days: 05
General objectives: Methodology

Cruise leader: Ahmedou
Participating scientists/technicians: Ad Corten, Alex Goutchine, Sidi Yahya, Mohamed Ahmed, Diallo Ibra, Cheikh Diop, Jemal Ould Abed

Country: Mauritania
Research vessel: AL-AWAM
Survey number: 03
Number of days: 05
General objectives: To estimate the biomass and map the distribution of pelagic fish stocks off Mauritania by acoustic methods and study the main environmental parameters

Cruise leader: Ebaye Sidina
Participating scientists/technicians: Ahmedou Ould Mohamed El Moustapha, Ahmed Diagne, M'Bodj
Other participants: Ad Corten, Remment, Alexeï, Dutch electronics engineer

Country: Mauritania
Research vessel: AL-AWAM
Survey number: 04
Number of days: 15
General objectives: Joint survey (Intercalibration)

Cruise leader: Ahmedou Ould Mohamed El Moustapha
Participating scientists/technicians: Ad Corten, Alex Goutchine, Sidi Yahya, Mohamed Ahmed, Diallo Ibra, Cheikh Diop, Jemal Ould Abed

(C) SUMMARY PLAN (PRELIMINARY) FOR PELAGIC SURVEYS R/V AL AMIR MOULAY ABDALLAH

Country: Morocco
Research vessel: AL AMIR MOULAY ABDALLAH
Survey number: 01
Number of days: 10
General objectives: To estimate the biomass and map the distribution of pelagic fish stocks from Safi to Tangier

Cruise leader: Omar Kada
Participating scientists/technicians: 4 scientists and 2 technicians

Country: Morocco
Research vessel: AL AMIR MOULAY ABDALLAH
Survey number: 02
Number of days: 10
General objectives: To estimate the biomass and map the distribution of pelagic fish stocks from Tangier to Saidia

Cruise leader: Najib Elouamri
Participating scientists/technicians: 4 scientists and 2 technicians
Country: Morocco

Research vessel: AL AMIR MOULAY ABDALLAH
Survey number: 03
Number of days: 10
General objectives: To estimate the biomass and map the distribution of pelagic fish stocks from Safi to Tangier

Cruise leader: Omar Kada
Participating scientists/technicians: 4 scientists and 2 technicians

Country: Morocco
Research vessel: AL AMIR MOULAY ABDALLAH
Survey number: 04
Number of days: 10
General objectives: To estimate the biomass and map the distribution of pelagic fish stocks from Tangier to Saidia

Cruise leader: Najib Elaouamri
Participating scientists/technicians: 4 scientists and 2 technicians

APPENDIX/ANNEXE G
Project: In situ measurement of the reflection index - Application to the West African zone

A. INTRODUCTION

Acoustic evaluation surveys were begun in 2001 in the sub-region by national vessels and the estimation of biomass during these surveys was based on the harreng TS. Surveys by R/V Dr. Fridtjof Nansen in the North-West African region have allowed on the one hand the estimation of coastal small pelagic stock abundance and on the other to map their distribution. This data series represents an abundance index relative to the various sources of bias, notably the reflection index. In order to improve the estimates a particular effort should be made when estimating the specific TS.

Following the recommendation on TS measurements by the Workshop for the review of acoustic surveys of the North-West African coast (Bergen, Norway, 28 September -2 October 1998) and taking into account the multi-specific nature of the fisheries and their behaviour in the pelagic ecosystem of the Northern CECAF region, it is necessary to put measures into place where reliable TS equations can be established for each of the main species.

B. TERMS OF REFERENCE

• Train the participants in the estimation of Target Strength
• Discuss the appropriateness of maintaining one target species for the sub-region in the implementation of Target Strength
• Carry out effective TS measurements onboard the R/V AL AWAM off the Mauritanian coast
• Standardise the Target Strength estimation methods

• Generally overcome sources of bias in acoustic biomass estimation.

C. PLACE: IMROP Nouadhibou, Mauritania.

D. DURATION AND TIME OF YEAR

Fifteen days between September and October:

• One week dedicated to the theory of TS measurement, the methodology to be adopted in the sub-region and the sources of bias in biomass estimation in general.

• One week for in situ practical implementation in the West African zone.

E. PARTICIPANTS

Morocco (2), Senegal (2), Mauritania (1), Gambia (1), Guinea (1)

Support: Two senior Norwegian researchers (E. Ona and one other)

F. ESTIMATED COST

To be finalized.

Projet: Mesure in situ d'index de réflexion - Application au cas de la zone ouest-africaine

A. INTRODUCTION

Depuis 2001 des campagnes d'évaluations acoustiques sont initiées dans la sous région par les navires nationaux et l'estimation de la biomasse durant ces campagnes est basée sur le TS du harreng. D'autre part, les campagnes du N/R DR. FRIDTJOF NANSENdans la région nord ouest africaine ont permis d'une part d'estimer l'abondance des stocks des petits pélagiques cotiers et d'autre part de cartographier leur distribution. Cette série de données représente un indice d'abondance relatif du fait des sources de biais divers dont notamment l'index de réflexion. Pour affiner les estimations, un effort particulier devrait porter sur l'estimation des TS spécifiques.

Suite à la recommandation sur les mesures de TS de l'Atelier sur la revue des prospections acoustique de la côte nord ouest-africaine (Bergen, Norvège, 28 septembre -2 octobre 1998) et considérant la nature multispécifique des pécheries et leur comportement dans l'ecosystéme pélagique de la région COPACE Nord, il est nécessaire d'effectuer des mesures in situ pour les espèces principales, de manière à établir des équations de TS fiables de chaque espèce.

B. TERMES DE RÉFÉRENCES

• Former les participants aux méthodes d'estimation du Target Strength
• Discuter de l'oppurtinité de retenir une espèce cible pour la sous région dans l'application du Target Strength
• Conduire des mesures effectives de TS à bord du navire N/R AL-AWAM au large des côtes mauritanienne.
• Standardiser les méthodes d'estimation du Target Strength

• Maîtrise en général des sources de biais dans l'estimation de la biomasse par l'acoustique.

C. LIEU: IMROP Nouadhibou, Mauritanie.

D. PÉRIODE ET DURÉE

Quinze jours entre septembre et octobre:

• Une semaine consacrée a la théorie sur les mesures de TS, la méthodologie à adopter pour la sous-région et les sources de biais dans l'estimation de la biomasse en général.

• Une semaine d'application pratique in situ au cas de la zone ouest africaine.

E. PARTICIPANTS

Maroc (2), Sénégal (2), Mauritanie (1), Gambie (1), Guinée (1)
Appui: Deux chercheurs seniors norvégiens (E. Ona et un autre)

F. COÛT ESTIMATIF

A finaliser.

APPENDIX/ANNEXE H
Typical echograms/Echogrammes typiques

Some typical echograms of horse mackerel provided by Senegal

Figure 1. Echogram of horse mackerel Trachurus tracae	Figure 2. Echogram of horse mackerel Trachurus tracae

Figure 3. Echogram of horse mackerel Trachurus tracae, mixed with a small proportion of Brachydeuterus auritus

Some typical echograms of sardinella provided by Senegal

Figure 4. Echogram of sardinella (Sardinella maderensis)	Figure 5. Echogram of sardinella (Sardinella maderensis)

Figure 6. Echogram of sardinella (Sardinella maderensis), mixed with a small proportion of Brachydeuterus auritus

Some images of echograms form the R/V Al-Awam acoustic survey