Biophysical Survey of Mafia Island Marine Reserves

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Average abundance (+/- SE) 30 25 20 15 10 5 0 Diadema Other Urchin Edible Cucumber Non-edible cucumber Octopus Squid/Cuttlefish Nudibranch Lobster COTS NT Starfish Giant Clam Cowrie Triton Trumpet Drupella Bull Mouth Helmet Figure 26. Average abundance (+/- SE) of invertebrates recorded on all transects completed on coral reef habitat at MBIMR. c) Reef Fish Abundance Reef fish data were collected over the same 25m transects as benthic composition and invertebrate data. Reef fish counts were high, and although very variable, several species were recorded for each transect. Certain species such as Dash and Dot Goatfish (Parupeneus barberinus) and Striped Bristletooth (Ctenochaetus striatus) ranked among the most abundant fish species on average per 25m transect at a rate of 1.55 (SE +/- 0.43) and 1.83 (SE +/- 0.44), respectively (Figure 27). Other common groups were Parrotfish, Triggerfish, and Moorish Idols. Of the 55 species or groups of reef fish data was collected on, 27 were recorded on transects at MBIMR.
Average abundance (+/- SE) 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 27. Mean abundance of reef fish species observed on all transects completed at MBIMR. d) Commercial Fish Abundance Four commercial fish surveys were completed for MBIMR. In common with SIMR, main species included Sweetlips (Haemulidae), Jacks and Trevallys (Carangidae), Emperors (Lethrinidae), and Fusiliers (Caesionidae). 3. Seagrass Habitat a) Substrate composition Data collection took place on both inner and outer shallow lagoonal sites at MBIMR. A total of forty 1m² quadrat areas were assessed for each site within a 250m² area. Analysis of the substrate composition data for site 1 showed that on average 96% (+/-SE 0.92) of the area sampled was composed of sand with the remainder formed of coral rock rubble (Figure 28). Site 2 (outer shallow) had a very different substrate composition; a quarter of the area consisted of rock with the remainder of the area divided equally between sand and rubble (Figure 29).
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 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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