8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
1/30
FAO SmartFish
Publication
PRELIMINARY RESULTS OF THE
HYDROACOUSTIC SURVEY CONDUCTED
ON LAKE KARIBASeptember 2014
33
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
2/30
Cover photograph courtesy FAO SmartFish
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
3/30
REPORT/RAPPORT: SF-FAO/2014/33
Preliminary Results of theHydroacoustic Survey conducted
on Lake Kariba
September 2014
GCP/RAF/466/EC SmartFish Project
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
4/30
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
5/30
3
Executive Summary
As a continuation of a hydroacoustic training in 2013 supported by SmartFish FAO, and in
accordance with recommendations of the Fifth Technical Consultation on Development
and Management of the Fisheries of Lake Kariba, SmartFish FAO supported a
hydroacoustic survey in August 2014.
The preliminary results of the survey that was undertaken to determine the standing
biomass of Kapenta in Lake Kariba show that by adding the estimated biomasses of the
basins and stratum, the estimated average standing biomass was 16,277 i.e. ± 9,730
tonnes.
In order to ascertain any changes over time and to draw substantial conclusions,
comparisons across time is necessary. A regular hydroacoustic survey programme will
have to be established and the relationship between densities and environmentalparameters should be assessed.
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
6/30
4
Résumé exécutif
Suite à la formation en hydroacoustique qui a été organisée en 2013 grâce au support de
SmartFish FAO, et conformément aux recommandations de la Cinquième Consultation
sur le Développement et la Gestion du Lac Kariba, SmartFish FAO a supporté laréalisation d’un relevé hydroacoustique en aout 2014.
Ce relevé a été réalisé pour déterminer la biomasse du kapenta dans le Lac Kariba.
Les résultats préliminaires montrent qu’en additionnant les relevés des biomasses des
bassins et couches, la moyenne estimée de biomasse est de 16 277 c’est-à-dire +/- 9
730 tonnes.
Pour vérifier les changements dans le temps et tirer des conclusions fiables, il est
nécessaire d’effectuer des comparaisons dans le temps. Un programme de relevés
hydroacoustiques réguliers devra être établi et les relations entre les densités et les
paramètres environnementaux devront être établies.
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
7/30
5
Contents
Executive Summary ______________________________________________________________ 3
Résumé exécutif _________________________________________________________________ 4
Contents ________________________________________________________________________ 5
List of Tables _____________________________________________________________________ 6
List of Figures ____________________________________________________________________ 6
List of Photos ____________________________________________________________________ 6
1. Background___________________________________________________________________ 7
2. Material and methods _________________________________________________________ 7
2.1 Description of the study area _______________________________________________ 7
2.2 Methods __________________________________________________________________ 82.3 Data analysis ____________________________________________________________ 11
3. Results _______________________________________________________________________ 11
3.1 Average length and weight of Kapenta along the lake ____________________ 11
3.2 Fish densities _____________________________________________________________ 11
3.2.1 Zimbabwean side of Lake Kariba _______________________________________ 11
3.2.2 Zambian side of Lake Kariba ____________________________________________ 13
3.3 Fish biomass _____________________________________________________________ 13
4. Conclusion and recommendations ____________________________________________ 15
Annex 1. List of participants and survey agenda __________________________________ 16
Annex 2. Pictures from the hydroacoustic survey __________________________________ 17
Annex 3. Data used to derive densities ___________________________________________ 24
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
8/30
6
List of Tables
Table 1: Average length and weight of Kapenta along Lake Kariba ______________ 12
List of Figures
Figure 1: Location of Lake Kariba in Africa ________________________________________ 8
Figure 2: Research vessel, Namazambwe ________________________________________ 9
Figure 3: The pre-defined sampling transects and basin boundaries _______________ 10
Figure 4: Trip track log __________________________________________________________ 10
Figure 5: Average Kapenta densities on the Zimbabwean side of Lake Kariba _____ 12
Figure 6: Correlation between Kapenta density and sampled depth in
Leisure Bay (un-fished area) ____________________________________________________ 12Figure 7: Average Kapenta densities on the Zambia side of Lake Kariba __________ 13
Figure 8: Average standing biomass per basin on the Zimbabwean
side of Lake Kariba. ____________________________________________________________ 14
Figure 9: Average standing biomass per basin on the Zambian side of Lake Kariba 14
List of Photos
Photo 1: Team photo taken during the official launch of the
hydroacoustic survey held in the Sinasongwe District Council Hall ------------------------- 17
Photo 2: The team members during preparations for the survey ---------------------------- 17
Photo 3: Some members of the team monitoring the screen during calibration ------- 18
Photo 4: Team members setting the sphere and the transducer during calibration -- 18
Photo 5: View of the screen during calibration ---------------------------------------------------- 19
Photo 6: Preparing the transducer --------------------------------------------------------------------- 19
Photo 7: Team photo prior to departure from Sinazongwe for the survey ---------------- 20
Photo 8: Launching CTD during the survey ---------------------------------------------------------- 20
Photo 9: Kapenta fish sample taken from a Kapenta rig during the survey -------------- 21
Photo 10: The biggest Kapenta collected during the survey ---------------------------------- 21
Photo 11: Measuring and weighing Kapenta samples ------------------------------------------ 22
Photo 12: The survey team just before disembarking “Namazambwe”
at Siavonga, after the hydroacoustic survey ------------------------------------------------------- 22
Photo 13: Data analysis being carried out by the survey team ------------------------------ 23
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
9/30
Preliminary results of the hydroacoustic survey conducted on Lake Kariba 7
1. Background
Lake Kariba is jointly owned by the governments of Zambia in the north and Zimbabwe in
the south. It lies between latitudes 16°28´ and 18°06´ south and longitude 26°40´ and
29°03´ east. The full operation of the reservoir was reached in 1963. Although the lakewas created as a hydroelectric reservoir, there are accounts of a considerable number of
activities taking place both in the lake and along its shores, including capture fisheries and
aquaculture.
In order to implement one of the recommendations of the Fifth Technical Consultation on
Development and Management of the Fisheries of Lake Kariba, a hydroacoustic survey was
conducted in Lake Kariba from 14 to 24 August 2014. The survey was conducted as a
continuation of the training conducted in Songo in 2013 and, for this reason, involved all
the personnel that attended this course, i.e: two officers from Zambia; two from
Zimbabwe; two from Malawi and two from Mozambique. The survey was co-funded by FAOand SmartFish. The survey agenda and the list of those involved is given in Annex 1.
The main objective of the hydroacoustic survey was to determine the standing biomass of
Kapenta in Lake Kariba, given that the last hydroacoustic survey on Lake Kariba was
carried out in 1997. Determination of the current biomass is thought to provide useful data
for the management of the Kapenta fishery.
In order to fulfill the aforementioned objective, the following activities were implemented:
♥ Calibration of the EK-60 split beam echo-sounder;
♥ Sampling with EK-60 along pre-established zigzag transects;
♥ Sampling of Kapenta from Kapenta fishing rigs;
♥ Sampling with CTD along the transects and;
♥ Data analysis.
2. Material and methods
2.1 Description of the study area
Lake Kariba is a man-made lake which lies between latitudes 16°28´ and 18°06´ south
and longitude 26°40´ and 29°03´ east. Figure 1 below, shows the geographic location of
the lake.
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
10/30
Material and methods8
Figure 1: Location of Lake Kariba in Africa
Overlaid on NDVI by Henry Ndaimani
The principal physical characteristic of the lake at the normal operating level of 485m
above mean sea level can be summarized as follows:
Catchment area 409,600 km²
Surface area 5,364 km²
Maximum length 320 km
Maximum depth 120 m
Maximum width 40 km
For management purposes, the lake is divided into five basins (Mlibizi, Binga, Sengwa,
Bumi/Chalala and Sanyati) on the Zimbabwean side and four strata numbered from 1 to 4,
west-easterly, on the Zambian side (Figure 3).
2.2 Methods
The survey was conducted at night, on board the Department of Fisheries of Zambia ’s
research vessel, “Namazambwe” (Figure 2). During sampling with EK-60, the transducer
was towed alongside the vessel, which moved at an average speed of 7 knots.
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
11/30
Preliminary results of the hydroacoustic survey conducted on Lake Kariba 9
Figure 2: Research vessel, Namazambwe
Calibration was done at the bay, close to the harbour. The actual sampling began where
the first transect starts, close to the town of Binga. Figures 3 and 4 show the pre-definedtransects and the trip log.
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
12/30
Material and methods10
Figure 3: The pre-defined sampling transects and basin boundaries
Figure 4: Trip track log
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
13/30
Preliminary results of the hydroacoustic survey conducted on Lake Kariba 11
CTD casts and fish samples were taken along the transects. CTD provides profile readings
of environmental parameters such as temperature, conductivity and depth, as well as
dissolved oxygen and chlorophyll. Fish samples were taken to derive the average weight of
fish in order to determine the biomass.
2.3 Data analysis
Sampled data from EK-60 were converted and analyzed using data analysis software
“SONAR 4”. Converted samples were analyzed for fish densities per transect and late
average densities per basin were calculated using Excel. The results of data sampled in the
different transects are presented in Annex 3.
In order to derive the average length and weight, weighted length and weight were
calculated per basin.
3. Results
3.1 Average length and weight of Kapenta along the lake
Both the average length and weight of Kapenta differ across basins and across stratum
(Table 1). Bigger individuals are found at the Sanyati basin, probably (possibly) as a result
of a spillover from the Leisure Bay, which is an un-fished area.
Table 1: Average length and weight of Kapenta along Lake Kariba
Basin/Stratum Average fishweight (g) Average fishlength (mm)
Mlibizi
Binga 1.06 52.23
Sengwa 1.01 50.76
Bumi-Chalala 0.85 49.79
Sanyati 1.14 50.72
Stratum 1 1.06 52.23
Stratum 2 1 49.77
Stratum 3 0.97 51.44
Stratum 4 1.14 50.72
3.2 Fish densities
3.2.1 Zimbabwean side of Lake Kariba
Fish densities for the Zimbabwean side of Lake Kariba are presented in Figure 5. The
highest densities were observed in Leisure Bay at an average of 50,000 fish/ha. However,
it should be noted that there was a significant variation of Kapenta fish densities at
different sampled points along the transects, which is consistent with an uneven
distribution of Kapenta along the lake.
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
14/30
Material and methods12
In fact, it was observed that, for the un-fished area, there was a strong correlation
between fish density and sampled depth (Figure 6). This scenario was not observed in
fished areas, which would suggest that other factors such as fishing are affecting fish
densities.
Figure 5: Average Kapenta densities on the Zimbabwean side of Lake Kariba
Figure 6: Correlation between Kapenta density and sampled depth in Leisure Bay
(un-fished area)
0
10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
M l i b i z i
B i n g a
S e n g w a
B u m
i - C h a l a l a
S a n y a t i
L a i s u r e b a y
K a p e n t a d e n s i
t y ( f / h a )
Basin
Kapenta fish density on the Zimbabwe side of Lake
Kariba
y = -1109.8x + 111644R² = 0.9252
0
20,000
40,000
60,000
80,000
100,000
120,000
0 20 40 60 80 100 120
K a p e n t a d e n s i t y ( f / h a )
Sampled depth (m)
Correlation between depth and fish density at Leisure
bay
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
15/30
Preliminary results of the hydroacoustic survey conducted on Lake Kariba 13
3.2.2 Zambian side of Lake Kariba
On the Zambian side of Lake Kariba, the Kapenta densities seemed highest on the first
stratum and lowest on the third. These results are somehow comparable with those of the
Zimbabwean side of the lake, with the exception of the 4 th stratum, which presents
relatively lower densities than its closest counterpart, the Sanyati basin.
Figure 7: Average Kapenta densities on the Zambia side of Lake Kariba
3.3 Fish biomass
The average Kapenta biomasses for the different basins on both sides of Lake Kariba are
presented in Figure 8 and Figure 9. Just as for the fish densities, the standing biomasses
vary across the basins and are highest in the Sanyati basin on the Zimbabwean side of the
lake.
0
10,000
20,000
30,000
40,000
50,000
60,000
70,000
Stratum 1 Stratum 2 Stratum 3 Stratum 4
K a p e n t a d e n s i t y ( f /
h a )
Stratum
Kapenta densities on the Zambia side of lake Kariba
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
16/30
Results14
Figure 8: Average standing biomass per basin on the Zimbabwean side of Lake
Kariba.
Figure 9: Average standing biomass per basin on the Zambian side of Lake Kariba
0
1000
2000
3000
4000
5000
6000
7000
K a p e n t a s t a
n d i n g b i o m a s s ( t o n n e s )
Basin
Kapenta standing biomass on the Zimbabwe side oflake kariba
0
500
1000
1500
2000
2500
3000
3500
4000
4500
Stratum 1 Stratum 2 Stratum 3 Stratum 4
K a p e n t a s t a n d i n g B i o m a s s ( t o n n e s )
Stratum
Kapenta standing biomass on the Zambia side of Lake
Kariba
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
17/30
Preliminary results of the hydroacoustic survey conducted on Lake Kariba 15
Total standing biomass
By adding the estimated biomasses of the basins and stratum, the estimated average
standing biomass was 16,277 i.e. ± 9,730 tonnes.
4. Conclusion and recommendations
Comparisons between the results reported in this study and those from previous surveys
are necessary in order to ascertain any changes over time.
Further analysis on the samples collated is required in order to assess densities/depth
variation along the transects.
The relationship between densities and environmental parameters should be assessed.
Fish densities versus distribution of Kapenta fishing efforts should be determined andmapped.
A regular hydroacoustic survey programme will have to be established.
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
18/30
Annexes16
Annex 1. List of participants and survey agenda
List of participants
Name Country
Jorge Mafuca Mozambique
Antonia Manica da Costa Mozambique
Daniel Mueleque Mozambique
Emmanuel Silwimba Zambia
Taylor Banda Zambia
Mebelo Wamulume Zambia
Itai Tendaupenyu Zimbabwe
Michael Tiki Zimbabwe
Stanley Mvula Malawi Innocent Gumurila Malawi
Nobuhle Ndhlovu FAO
Drivers (2) FAO
Boat crew (3) Zambia
Survey agenda
Day Date Activity
1 10/08/2014 Arrival of participants in Harare
2 14/08/2014 Departure to Sinazongwe, Zambia via Kariba (to pick
up Kariba and Siavonga participants)
3 15/08/2014 Official opening
Recap. for participants
4 16/08/2014 Calibration of equipment
5 17/08/2014 Calibration of equipment
6 18/08/2014 Night survey
7 19/08/2014 Night survey
8 20/08/2014 Night survey
21/08/2014 Night survey
22/08/2014 Night survey
23/08/2014 Arrival in Siavonga, disembarcation from boat and
departure for Kariba, Zimbabwe.
9 24/08/2014 Data analysis at Lake Kariba Fisheries Research
Institute
10 25/08/2014 Departure for Harare and participants from Zambia
travel back to Zambia
11 26/08/2014 Participants travel back to respective countries
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
19/30
Preliminary results of the hydroacoustic survey conducted on Lake Kariba 17
Annex 2. Pictures from the hydroacoustic survey
Photo 1: Team photo taken during the official launch of the hydroacoustic survey
held in the Sinasongwe District Council Hall
Photo 2: The team members during preparations for the survey
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
20/30
Annexes18
Photo 3: Some members of the team monitoring the screen during calibration
Photo 4: Team members setting the sphere and the transducer during calibration
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
21/30
Preliminary results of the hydroacoustic survey conducted on Lake Kariba 19
Photo 5: View of the screen during calibration
Photo 6: Preparing the transducer
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
22/30
Annexes20
Photo 7: Team photo prior to departure from Sinazongwe for the survey
Photo 8: Launching CTD during the survey
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
23/30
Preliminary results of the hydroacoustic survey conducted on Lake Kariba 21
Photo 9: Kapenta fish sample taken from a Kapenta rig during the survey
Photo 10: The biggest Kapenta collected during the survey
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
24/30
Annexes22
Photo 11: Measuring and weighing Kapenta samples
Photo 12: The survey team just before disembarking “Namazambwe” at
Siavonga, after the hydroacoustic survey
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
25/30
Preliminary results of the hydroacoustic survey conducted on Lake Kariba 23
Photo 13: Data analysis being carried out by the survey team
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
26/30
Annexes24
Annex 3. Data used to derive densities
Transect Basin StratumSample
NumberDepth Total f/ha
1 Binga 1 1 37.95 62,911
1 Binga 1 2 27.7 63,165
1 Binga 1 3 17.17 2,589
1 Binga 1 4 12.74 8,523
2 Binga 1 1 31.86 6,410
2 Binga 1 2 44.6 70,144
2 Binga 1 3 36.84 15,534
2 Binga 1 4 40.17 58,346
2 Binga 1 5 55.68 80,577
2 Binga 1 6 42.94 49,058
2 Binga 1 7 38.78 26,685
2 Binga 1 8 32.41 45,652
3 Binga 1 1 32.69 32,396
3 Binga 1 2 45.43 29,552
3 Binga 1 3 42.94 39,131
3 Binga 1 4 40.17 48,515
3 Binga 1 5 31.30 11,560
3 Binga 1 6 28.53 32,602
3 Binga 1 7 26.59 19,7073 Binga 1 8 18.00 22,351
3 Binga 1 9 24.65 31,071
3 Binga 1 10 21.61 48,450
4 Binga 2 1 22.44 35,981
4 Binga 2 2 19.94 28,229
4 Binga 2 3 19.11 11,079
4 Binga 2 5 23.55 11,232
4 Binga 2 6 18.56 2,662
4 Binga 2 7 27.15 19,327
4 Binga 2 8 23.55 10,406
5 Sengwa 2 1 26.04 253
5 Sengwa 2 2 24.1 7,408
5 Sengwa 2 3 32.69 31,087
5 Sengwa 2 4 40.72 12,889
5 Sengwa 2 5 37.95 8,003
5 Sengwa 2 6 31.58 43,511
5 Sengwa 2 7 23.27 26,204
6 Sengwa 2 1 23.55 14,794
6 Sengwa 2 2 40.04 79,8776 Sengwa 2 3 51.25 42,046
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
27/30
Preliminary results of the hydroacoustic survey conducted on Lake Kariba 25
Transect Basin StratumSample
NumberDepth Total f/ha
6 Sengwa 2 4 65.93 2,691
6 Sengwa 2 5 36.46 21,652
7 Sengwa 2 1 56.01 7,177
7 Sengwa 2 2 43.69 9,092
7 Sengwa 2 3 49.31 22,747
7 Sengwa 2 4 50.69 34,911
7 Sengwa 2 5 67.31 17,411
7 Sengwa 2 6 27.98 1,274
8 Sengwa 2 1 31.03 49,374
8 Sengwa 2 2 60.39 46,636
8 Sengwa 2 3 53.74 35,055
8 Sengwa 2 4 31.3 27,250
8 Sengwa 2 1 19.94 27,9449 Sengwa 2 2 31.86 40,508
9 Sengwa 2 3 42.11 10,522
9 Sengwa 2 4 39.61 83,331
9 Sengwa 2 5 50.97 92,396
9 Sengwa 2 6 57.34 10,320
9 Sengwa 2 7 53.14 24,202
9 Sengwa 2 8 22.99 10,626
9 Sengwa 2 9 24.93 6,225
10 Sengwa 3 1 38.5 52,541
10 Sengwa 3 2 48.75 58,574
10 Sengwa 3 3 46.81 88,998
10 Sengwa 3 4 59.83 33,237
11 Sengwa 3 1 39.61 6,967
11 Sengwa 3 2 46.26 10,623
11 Sengwa 3 3 52.35 25,863
11 Sengwa 3 4 31.58 7,863
11 Sengwa 3 5 32.69 6,284
11 Sengwa 3 6 56.23 31,636
11 Sengwa 3 7 20.78 9,54211 Sengwa 3 8 25.76 37,385
11 Sengwa 3 9 21.88 14,166
12 Bumi-Chalala 3 1 24.38 12,831
12 Bumi-Chalala 3 2 42.66 10,284
12 Bumi-Chalala 3 4 60.94 13,836
12 Bumi-Chalala 3 5 62.88 19,907
12 Bumi-Chalala 3 6 53.35 22,767
12 Bumi-Chalala 3 7 40.17 13,713
12 Bumi-Chalala 3 8 32.96 8,475
12 Bumi-Chalala 3 9 39.9 6,486
12 Bumi-Chalala 3 10 21.88 12,840
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
28/30
Annexes26
Transect Basin StratumSample
NumberDepth Total f/ha
12 Bumi-Chalala 3 11 17.17 12,540
12 Bumi-Chalala 3 12 15.79 9,000
12 Bumi-Chalala 3 13 13.85 41,560
12 Bumi-Chalala 3 14 30.47 18,000
12 Bumi-Chalala 3 15 41.27 8,013
12 Bumi-Chalala 3 16 26.87 8,146
12 Bumi-Chalala 3 17 65.37 21,562
12 Bumi-Chalala 3 18 39.34 26,136
13Tashinga/SambaKaluma 4 1 41.27 21,146
13Tashinga/SambaKaluma 4 2 64.82 38,896
13
Tashinga/Samba
Kaluma 4 3 85.04 27,428
13Tashinga/SambaKaluma 4 4 91.69 45,232
13Tashinga/SambaKaluma 4 5 80.61 7,539
13Tashinga/SambaKaluma 4 6 81.72 10,622
14 Sanyati 1 65.10 38,900
14 Sanyati 2 55.12 45,048
14 Sanyati 3 27.42 43,301
14 Sanyati 4 30.75 48,811
14 Sanyati 5 51.25 64,80314 Sanyati 6 46.54 60,275
14 Sanyati 7 52.63 38,168
14 Sanyati 8 23.55 68,756
14 Sanyati 9 23.82 56,231
15 Sanyati 1 26.04 60,050
15 Sanyati 2 33.52 34,891
15 Sanyati 3 34.09 58,704
15 Sanyati 4 37.95 32,025
15 Sanyati 5 61.50 31,964
15 Sanyati 6 66.48 35,280
15 Sanyati 7 66.48 36,247
15 Sanyati 8 32.13 69,106
15 Sanyati 9 71.47 60,538
16 Sanyati 1 60.66 41,794
16 Sanyati 2 54.45 42,988
16 Sanyati 3 50.14 40,477
16 Sanyati 4 52.08 53,436
16 Sanyati 5 25.21 64,130
16 Sanyati 6 36.01 51,29317 Leisure Bay 1 15.51 87,234
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
29/30
Preliminary results of the hydroacoustic survey conducted on Lake Kariba 27
Transect Basin StratumSample
NumberDepth Total f/ha
17 Leisure Bay 2 19.39 98,747
17 Leisure Bay 3 23.27 98,468
17 Leisure Bay 4 35.73 68,499
17 Leisure Bay 5 57.06 39,552
17 Leisure Bay 6 63.16 34,746
17 Leisure Bay 7 71.47 27,211
17 Leisure Bay 8 81.44 19,940
17 Leisure Bay 9 77.84 20,413
17 Leisure Bay 10 95.57 21,859
8/20/2019 Hydroaccoustic Survey Lake Kariba-web-33
30/30
SmartFish is a regional fisheries project managed by the Indian Ocean
Commission, funded by the European Union and co-implemented by theFood and Agriculture Organization of the United Nations. SmartFish, which
operates in 20 countries throughout the East and Southern Africa - Indian
Ocean region, focuses on fisheries governance, management, monitoring,
control and surveillance, trade, and food security.
As a continuation of a hydroacoustic training in 2013 and in accordance
with recommendations of the Fifth Technical Consultation on Development
and Management of the Fisheries of Lake Kariba, SmartFish supported a
hydroacoustic survey in August 2014. This report documents the
preliminary results of the survey that was undertaken to determine the
standing biomass of Kapenta in Lake Kariba.