Biophysical Survey of Mafia Island Marine Reserves

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c) Invertebrate abundance Invertebrate abundance was collected alongside substrate composition and benthic composition. Largest abundances for site 1 were observed for urchin (2.5 +/- SE 0.56) and starfish (2.1 +/- SE 0.22) species (Figure 32). Site 2 had a more diverse invertebrate community than recorded for site 1 but much lower abundance levels (Figure 33). Average abundance (+ /- S E ) 4 3.5 3 2.5 2 1.5 1 0.5 0 Urchins Sea Cucumber Starfish Razor Clam Cowrie Scallop Nudibranchs Shrimp Gastropod Cone Shell Tube Worm Figure 32. Average abundance of invertebrates within sea grass habitats at site one showing standard error bars. Average abundance (+/- SE ) 4 3.5 3 2.5 2 1.5 1 0.5 0 Urchins Sea Cucumber Starfish Razor Clam Cowrie Scallop Nudibranchs Shrimp Gastropod Cone Shell Tube Worm Figure 33. Average abundance of invertebrates within sea grass habitats at site two showing standard error bars.
d) Fish abundance The highest abundance of juvenile emperors was recorded for the shallow and deep seagrass habitats at MBIMR out of all the habitats surveyed (Figure 34). These areas were also found to support large populations of seagrass Parrotfish (Leptoscerus vaigiensis) (Figure 34). In total, fish were recorded in half of the categories looked for. In contrast to the seagrass habitats around SIMR, no Barracuda, Surgeonfish, or Rabbit Fish were observed. This suggests that there is lower overall diversity at MBIMR. Average abundance (+/- SE) 35 30 25 20 15 10 5 0 damselfish goatfish cigar wrasse bird wrasse other wrasse snapper emperor emperor juvenile fuseliers SG parrot parrot surgeon pufferfish sergeantfis barracuda razorfish rabbitfish demoiselle cardinalfish toby grouper other Mbarakuni Shallow Mbarakuni Deep Figure 34. Average abundance (+/- SE) of fish within shallow and deep sea grass beds for all fish swims completed 4. Stakeholder identification & analysis Mbarakuni was observed to have a seasonal fishing camp where a maximum of approximately 30 fishers were based on a short term rolling basis. During the season of northerly monsoon (November to March), the camp was vacated. Most visiting vessels were canoes and short range sailing vessels such as ‘ngalawas’ and fishing was generally artisanal. However, there were also some motorised commercial activities, notably
Page 1: Frontier Tanzania Environmental Res
Page 4 and 5: Suggested Technical Report citation
Page 6 and 7: Executive Summary Major Findings
Page 8 and 9: price it fetches may be contributin
Page 10 and 11: IV. RESULTS A. Nyororo Island Marin
Page 12 and 13: I. INTRODUCTION Project Aim To cond
Page 14 and 15: The reserves were established under
Page 16 and 17: III. METHODS A. Field Methods 1. Re
Page 18 and 19: Ground Proofing Methodology (Low Re
Page 20 and 21: Invertebrate Abundance Invertebrate
Page 22 and 23: Commercially Targeted Fish The meth
Page 24 and 25: Indian Ocean Bird wrasse Gomphosus
Page 26 and 27: Several areas of coral reef habitat
Page 28 and 29: area, the most extensive continuous
Page 30 and 31: Average abundance (+/- SE) 30 25 20
Page 32 and 33: Average abundance (+/- SE) 3 2.5 2
Page 34 and 35: stop off or shelter. Boats from the
Page 36 and 37: 2. Coral Reef Habitat a) Benthic Co
Page 42 and 43: 68% 5% 18% 2% 0% 1% 0% 6% 0% 0% Tha
Page 44 and 45: on Mbarakuni. At times of good weat
Page 46 and 47: edge is visible at around 10m deep.
Page 50 and 51: 97% 0% Figure 28. Average percentag
Page 54 and 55: lobster fishing. A foreign financed
Page 56 and 57: (Chaetodon trifascialus) are closel
Page 58 and 59: transects. Commercial fish species
Page 60 and 61: damage at present, but if further u
Page 62 and 63: VI. Appendices Appendix 1. Fish spe
Page 64 and 65: Whitespotted Epinephelus Grouper ca

Biophysical Survey of Mafia Island Marine Reserves

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