Tanga Fisheries Analysis - IUCN

Table of Contents
Acknowledgements ..................................................................................................................... vi
Executive Summary.................................................................................................................... vii
1. Background ............................................................................................................................. 1
2. A Brief History of TCZCDP Collaborative Management Areas............................................. 1
3. A summary of all available Frame Survey data for Tanga Region....................................... 3
4. Summary Description of Previous and Current Fisheries
Sampling Protocols in TCZCDP ............................................................................................. 4
4.1. First TCZCDP Fisheries Sampling Protocol (1995-2001) ................................................... 5
4.1.1. Description of the Sampling Method .............................................................................. 5
4.1.2. Observations on the 1 st TCZCDP Sampling Protocol ..................................................... 6
4.2. Second TCZCDP Fisheries Sampling Protocol (2001-2003) .............................................. 7
4.2.1. Description of the Sampling Method .............................................................................. 7
4.2.2. Observations on the 2 nd TCZCDP Sampling Protocol .................................................... 8
4.3. Third TCZCDP Fisheries Sampling Protocol (2003-present) ............................................ 10
4.3.1. Description of the Sampling Method ............................................................................ 10
4.3.2. Observations on the 3 rd TCZCDP Sampling Protocol................................................... 11
4.4. Summary Comparison of the Three TCZCDP Sampling Protocols................................... 13
5. Previous data analysis activities and their major findings ................................................ 13
5.1. Sampling Effort 1995-2000............................................................................................... 13
5.2. Analysis of Catch per Unit Effort (Catch-Rate) ................................................................. 14
6. Description of Methods for the analysis of fisheries data.................................................. 15
6.1. Estimates of Total Catch/Value ........................................................................................ 15
6.2. Total Catch Estimate Equation Components.................................................................... 15
6.3. Standardising CPUE data for between-year comparisons................................................ 15
6.4. Statistical Tests................................................................................................................ 17
7. Results from analysis of the fisheries data......................................................................... 18
7.1. Total Catch and Value for the Region, by District and by CMA......................................... 18
7.2. The Spatial and Temporal profile of Fishing Effort and Catch-rate ................................... 20
7.2.1. Annual Variations in CPUE for Ngalawa using Mishipi................................................. 20
7.2.2. Seasonal Variations in CPUE for Ngalawas using Mishipi ........................................... 21
7.2.3. Annual Variations in CPUE for Ngalawa using Madema .............................................. 25
7.2.4. Seasonal Variations in CPUE for Ngalawas using Madema ........................................ 25
7.2.5. Annual Variations in CPUE for Ngalawa using Jarife ................................................... 27
7.2.6. Seasonal Variations in CPUE for Ngalawas using Jarife.............................................. 27
7.3. Catch Composition........................................................................................................... 30
7.4. Variations in Price of Fish by Species/Species Group ...................................................... 34
7.5. The Use of Different CMAs by Local Fishers.................................................................... 40
8. Discussion and Recommendations..................................................................................... 43
8.1. Reduced Destructive Fishing ........................................................................................... 45
8.2. Reduced User Conflicts/Access Issues ............................................................................ 45
8.3. Increased Fish Stocks...................................................................................................... 45
8.3.1. Supervision of Data Collectors..................................................................................... 47
8.3.2. Data Management ....................................................................................................... 47
8.3.3. Fishing Gear Definitions .............................................................................................. 48
8.3.4. Species Identification................................................................................................... 48
8.3.5. Harmonising Data Collection with District Fisheries Office Activities ............................ 48
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