Biophysical Survey of Mafia Island Marine Reserves

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Average abundance (+/- SE) 3 2.5 2 1.5 1 0.5 0 Lined Butterflyfish Saddleback Butterflyfish Black Backed Butterflyfish Vagabond Butterflyfish Threadfin Butterflyfish Teardrop Butterflyfish Bennetts Butterflyfish Zanzibar Butterflyfish Crown Butterflyfish Kleins Butterflyfish Yellowhead Butterflyfish Racoon Butterflyfish Spotted Butterflyfish Somali Butterflyfish Redfin Butterflyfish Meyers Butterflyfish Chevron Butterflyfish Blackburns Butterflyfish Black Pyramid Big Long-nosed Longfin Bannerfish Masked Bannerfish Three Spot Angelfish Dusky Angelfish Regal Angelfish Emperor Angelfish Semi Circle Angelfish Earspot Angelfish Yellowbar Angelfish Moorish Idol Brushtail Tang Sailfin Tang Convict Surgeonfish Powder Blue Surgeonfish Palette Surgeonfish Thompsons Surgeonfish Lietenant Surgeonfish Black Surgeonfish Two Spot Bristletooth Striped Bristletooth Goldring Bristletooth Slingjaw Wrasse Checkerboard Wrasse Indian Ocean Bird Wrasse Goldbar Wrasse Six-bar Wasse Yellow Saddle Goatfish Long Barbel Goatfish Dash & Dot Goatfish Triggerfish Grouper Parrotfish Unicornfish Batfish Rabbitfish Figure 11. Mean abundance of reef fish species observed across all transects completed at site three, NIMR. d) Commercial Fish Abundance Observations made whilst exploring the reefs have shown the existence of a number of commercial fish species of relatively high abundance, namely blackspotted sweetlips (Plectorhinchus gaterinus), goldspotted sweetlips (Plectrohinchus flavomaculatus) and several species of snapper (Lutjanidae spp). In particular, site 2 had high numbers of black spotted and gold spotted sweetlips present. All of the surveyed sites had abundant populations of surgeonfish and parrotfish. Low numbers of groupers were observed during commercial fish swims. A small number of the commercial fish species looked for were present at site 1 at NIMR. Highest abundances were recorded for surgeonfish (Acanthuridae spp.), parrotfish, and black spot snappers and emperors (Figure 12). Other recorded families include snappers, sweetlips, goatfish, triggerfish, and fusiliers.
Average abundance (+/- SE) 18 16 14 12 10 8 6 4 2 0 Peacock Grouper Sixspot Grouper Coral Hind Grouper Saddleback Coral Grouper Whitespotted Grouper Other Grouper Blackspot Snapper Red Snapper Blue Lined Snapper Other Snapper Black Sweetlips Slatey Sweetlips Oriental Sweetlips Blackspotted Sweetlips Goldspotted Sweetlips Other Sweetlips Spangled Emperor Blackspot Emperor Longface Emperor Bigeye Emperor Other Emperor Thumbprint Spinecheek Jacks/Trevally Kingfish/Tuna Parrotfish Surgeonfish Rabbitfish Goatfish Barracuda Triggerfish Needlefish Fusiliers Sharks/Rays Figure 12. Mean abundance of commercial fish species observed on across all swims completed at site 1, NIMR. 3. Seagrass Habitats Initial observations have shown that there are extensive, varied and rich seagrass beds at various locations around NIMR (Figure 3). Further examination of these areas would be likely to demonstrate the importance of these habitats and their significant role to the ecological diversity found at NIMR. Constraints imposed by both time and weather conditions meant that no data could be collected on seagrass habitats in NIMR during the course of this study. 4. Stakeholder identification & analysis Nyororo Island has a large and permanent fishing camp. The camp features a lighthouse and lookout tower to aid navigation, and stocks basic supplies such as food that passing vessels may take on. Boats from both Mafia and the mainland rendezvous here to trade. Its position between the two makes it ideal both as a trading post and as a
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 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 52 and 53: c) Invertebrate abundance Invertebr
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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