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 16. Mean abundance (+/- SE) of invertebrates recorded on all transects completed on coral reef habitat at SIMR. c) Reef Fish Abundance Reef fish data was 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 1.88 +/- SE 0.29 and 1.88 +/- 0.29 SE, respectively (Figure 17). The diverse parrotfish family (Scaridae) was also notably high, although this category included all species of parrotfish, not individual species. Of the 55 species or groups of reef fish data were collected on, 32 were recorded on transects at SIMR.
Average abundance (+/- SE) 3.5 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 17: Average abundance (+/- SE) of reef fish recorded on all transects completed on coral reef habitat at SIMR. d) Commercial Fish Abundance A total of eight commercial fish surveys were completed for SIMR. Common species noted include Sweetlips (Haemulidae), Jacks and Trevallys (Carangidae), Surgeonfish (Acanthuridae), Parrotfish (Scaridae), Goatfish (Mullidae), and Fusiliers (Caesionidae) (Figure 18). SIMR has a particularly high population of Blue Spotted Stingrays (Dasyatis kuhlii) which is not reflected well in the data collected, as they tend to be buried in sandy substrates at the bottom of the reef. In some locations, between 20 and 30 stingrays were observed during each 45 minute dive.
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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