CORAL REEF DEGRADATION in the INDIAN OCEAN Status Report 2005
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
What Is Coral Bleaching
Mote Marine Laboratory / Florida Keys National Marine Sanctuary Coral Bleaching Early Warning Network Current Conditions Report #20180727 Updated July 27, 2018 Summary: Based on climate predictions, current conditions, and field observations, the threat for mass coral bleaching within the FKNMS is currently MODERATE. NOAA Coral Reef Watch Current and 60% Probability Coral Bleaching Alert Outlook July 25, 2018 (experimental) June 30, 2015 (experimental) Figure 2. NOAA’s Experimental 5km Coral Bleaching HotSpot Map for Florida July 25, 2018. coralreefwatch.noaa.gov/vs/gauges/florida_keys.php Figure 1. NOAA’s 5 km Experimental Current and 60% Probability Coral Bleaching Alert Outlook Areas through October, 2018. Updated July 25, 2018. coralreefwatch.noaa.gov/vs/gauges/florida_keys.php Weather and Sea Temperatures According to the newly released NOAA Coral Reef Watch (CRW) experimental 5 kilometer (km) Satellite Current and 60% Probability Coral Bleaching Alert Area, most areas of the Florida Keys National Marine Sanctuary are under a bleaching Warning or Alert Level 1, which means bleaching is likely and potential for more bleaching warnings and alerts if sea Figure 3. NOAA’s Experimental 5km Degree Heating temperatures continue to increase in the next few weeks (Fig. 1). Weeks Map for Florida July 25, 2018. coralreefwatch.noaa.gov/vs/gauges/florida_keys.php Recent remote sensing analysis by NOAA’s CRW program indicates that most of the Florida Keys region is currently experiencing thermal stress. NOAA’s 35 new experimental 5 km Coral Bleaching HotSpot Map (Fig. 2), which 30 illustrates current sea surface temperatures compared to the average temperature for the warmest month, shows elevated temperatures for the 25 Florida Keys. -
Photoinhibition and Photoprotection in Symbiotic Dinoflagellates from Reef-Building Corals
MARINE ECOLOGY PROGRESS SERIES Vol. 183: 73-86.1999 Published July 6 Mar Ecol Prog Ser 1 Photoinhibition and photoprotection in symbiotic dinoflagellates from reef-building corals Ove Hoegh-Guldberg*, Ross J. Jones School of Biological Sciences, Building A08. The University of Sydney, New South Wales 2006. Australia ABSTRACT: Pulse-amplitude-modulation fluorometry and oxygen respirometry were used to investi- gate die1 photosynthetic responses by symbiotic dnoflagellates to light levels in summer and winter on a high latitude coral reef. The symbiotic dinoflagellates from 2 species of reef-building coral (Porites cylindnca and Stylophora pistillata) showed photoinhibitory decreases in the ratio of variable (F,) to maximal (F,) fluorescence (F,/F,,,) as early as 09:00 h on both summer and winter days on the reefs associated wlth One Tree Island (23" 30'S, 1.52" 06' E; Great Barrier Reef, Australia). This was due to decreases in maximum, F,, and to a smaller extent minimum, F,, chlorophyll fluorescence. Complete recovery took 4 to 6 h and began to occur as soon as light levels fell each day. Chlorophyll fluorescence quenching analysis of corals measured during the early afternoon revealed classic regulation of photo- system I1 (PSII) efficiency through non-photochemical quenching (NPQ). These results appear to be similar to data collected for other algae and higher plants, suggesting involvement of the xanthophyll cycle of symbiotic dinoflagellates in regulating the quantum efficiency of PSII. The ability of symbiotic dinoflagellates to develop significant NPQ, however, depended strongly on when the symbiotic dinoflagellates were studied. Whereas symbiotic dinoflagellates from corals in the early afternoon showed a significant capacity to regulate the efficiency of PSII using NPQ, those sampled before sun- rise had a slower and much reduced capacity, suggesting that elements of the xanthophyll cycle are suppressed prior to sunrise. -
Pdf | 374.1 Kb
VULNERABILITY LEVEL OF TRANSITIONAL SHELTER SITES GALLE DISTRICT TSST 2nd round - January 2007 HABARADUWA DS DIVISION Area Detail Migoda ! AngulugahaAkmeemana !! Annasiwathugoda Bogahamulugoda Legend Happawana Relative Vulnerability Hab_8 *# *# Severe *# High Unawatuna West Handogoda *# Moderate Bonavistawa Meepe Harumalgoda West Unawatuna East *# Low Unawatuna Dodampe ! Pitiduwa ! 0* Decommissioned Hab_7 Harumalgoda Central ! *# Maharamba Towns Halloluwagoda Godawatta Yaddehimulla Main Road Attaragoda Pelessa Unawatuna Central Minor Road Lanumodara Pitidoowa Track Road Harumalgoda East Dalawella GN Boundary Thalpe South Wellethota !Talpe DS Boundary Heenatigala South Thalpe East Kahawennagama Katukurunda Alawathuthisgoda Liyanagoda Implemented by Uragasgoda Koggala West Habaraduwa Koggala East Morampitigoda ! Kathluwa West Koggala Kathluwa Central Korahedigoda Meegahagoda Coordinated by Hab_6Koggala Powered by ! Hab_3 Danduhela *# Hab_5 Atadahewathugoda *# Hab_1 0*Hab_2 *# Kahawathugoda Hab_4 0* Kalapuwa *# Kathluwa East Meliyagoda Ahangamgoda Welhengoda Supported By Karandugoda Kalahegoda Digaredda Piyadigama West Indian Ocean Wadugegoda © 2006 UNOPS-TSST Ahangama Dommannegoda ! Transitional Shelter Site Tracking Project, UNOPS, 17, Park Avenue, Colombo 05. Tel. +94 11 2582798 Fax +94 11 2580962 Piyadigama East Email: [email protected] Website: http://www.unops.org.lk/tsst Site Code Site Name Total Vul. Hab-1 Eluketiya I - Sewalanka Camp Decom Hab-2 Eluketiya 11 - Sewalanka Camp Decom Note: The boundaries, names and the designations used on this map do not Hab-3 Arund TSS Camp - SK Land 2 imply official endorsement or acceptance Hab-4 IAK Village 3 by the United Nations. Hab-5 Sinha Deewara Gama 2 Hab-6 Arunagamdora / Koggala Depot 1 ® TSST - UNOPS Hab-7 Yaddehimulla - Ministry of Fisheries (JVP) 2 Kilometers Hab-8 Kashapana Road, Unawatuna - Ministry of Fisheries 3 Ref: M_TV_03154_02 Date: 22/02/2007 012 Decom - Decommissioned Site(s) Rev: - Updated: -. -
Emerging Stronger: Five Years After the Indian
Kampung Mulia Tibang Darussalam INDONESIA Pante Tengoh Jurong Tengoh Emperom Kramat Luar Jurong Ara Cempaka Lambhuk Lampoh Krueng Jurong Binje Lamgugop Gampong Cot Lam Kruet Lhok Nga BAND A AC EH Meunasah Beurembang Lham Lhom Kiran Krueng Leupung AC EH BESAR Sigli Meunasah Lueng Meunasah Mesjid Lhoong Jangka Buya PID IE STARIT OF MALACCA Lamgeurihe Blang Monlueng AC EH J AY A Meunasah Kulam Sampoinet-Lhok Kruet Alue Gro Blang Dalam Sampoinet- Keuda Patek Crak Mong Sayeung Setia Bakti Rigaih – Lhok Timun Jabi – Lhok Timun AC EH BARAT Arongan Arongan Lambalek Cot Kumbang Darat Samatiga Cot Kumbang Pulau Johan Pahlawan Meulaboh Peuribu Alue Raya Meurebo NAGAN RAY A Suak Kemude Gampong Tengoh Kuta Padang Kuala Ujong Beuso Cot Darat Cot Kumbang Pasung Medan Langung Kuala Tuha Meurebo Cot Mee Habitat Resource Center Sumatra Peunaga Rayeuk Cot Rambung S U M A T E R A Peunaga Cot Ujong Langkak Gunong Kleng Kuala Tadu APPENDICES Paya Peunaga Kuala Trang Padang Rubek Lueng Mane Peunaga Pasi Leung Teuku Ben Gampong Lhok. Sub-district Habitat project areas Current Habitat Resource Center Former Habitat Resource Center NIAS 0 50 kms100 42 Emerging stronger: Five years after the Indian Ocean tsunami Kampung Mulia Tibang Darussalam INDONESIA Pante Tengoh Jurong Tengoh Emperom Kramat Luar Jurong Ara Cempaka Lambhuk Lampoh Krueng Jurong Binje Lamgugop Gampong Cot Lam Kruet Lhok Nga BANDA ACEH Meunasah Beurembang Lham Lhom Kiran Krueng Leupung ACEH BESAR Sigli Meunasah Lueng Meunasah Mesjid Lhoong Jangka Buya PIDIE Lamgeurihe ACEH JAYA Blang Monlueng Meunasah -
Status of Alcyonacean Corals Along Tuticorin Coast of Gulf of Mannar, Southeastern India
Indian Journal of Geo-Marine Sciences Vol. 43(4), April 2014, pp. 666-675 Status of Alcyonacean corals along Tuticorin coast of Gulf of Mannar, Southeastern India S. Rajesh, K. Diraviya Raj, G. Mathews, T. Sivaramakrishnan & J.K. Patterson Edward Suganthi Devadason Marine Research Institute 44-Beach Road, Tuticorin – 628 001, Tamil Nadu, India [E-mail: [email protected]] Received 28 November 2012; revised 7 December 2012 In this study, the assessment of alcyonaceans was conducted in Tuticorin coast of the Gulf of Mannar during the period between 2010 and 2012 in 5 locations; Vaan, Koswari, Kariyachalli and Vilanguchalli islands and mainland Punnakayal patch reef. Average alcyonacean coral cover in Tuticorin coast was 6.76% during 2011-12 which was 5.61% during 2010- 2011. Percentage cover of alcyonacean corals increased in all the study locations; Kariyachalli 12.04 to 13.96%; Vilanguchalli 8.94 to 10.23%; Koswari 1.6 to 3.69; Vaan 0.53 to 0.72; mainland Punnakayal patch reef 4.95 to 5.21% was documented. In total, 15 species from 7 genera were recorded during the study period. Though anthropogenic threats in Tuticorin coast are comparatively high, the abundance of alcyonacean corals has increased considerably showing their resilience and adaptability. [Keywords: Alcyonacean corals, Status, Diversity, Tuticorin, Gulf of Mannar] Introduction experience all the natural and anthropogenic threats. Alcyonacean corals (soft corals and gorgonians) Reef ecosystems of Gulf of Mannar are heavily are modular cnidarians composed of polyps that stressed due to various human induced threats like always have eight tentacles and are oftentimes destructive and over fishing practices, coral mining, connected by vessels classified under subclass domestic and industrial pollution, seaweed and other Octocorallia while hard corals have six tentacles resource collection in reef areas and invasion of (which are hexa corals). -
Checklist of Fish and Invertebrates Listed in the CITES Appendices
JOINTS NATURE \=^ CONSERVATION COMMITTEE Checklist of fish and mvertebrates Usted in the CITES appendices JNCC REPORT (SSN0963-«OStl JOINT NATURE CONSERVATION COMMITTEE Report distribution Report Number: No. 238 Contract Number/JNCC project number: F7 1-12-332 Date received: 9 June 1995 Report tide: Checklist of fish and invertebrates listed in the CITES appendices Contract tide: Revised Checklists of CITES species database Contractor: World Conservation Monitoring Centre 219 Huntingdon Road, Cambridge, CB3 ODL Comments: A further fish and invertebrate edition in the Checklist series begun by NCC in 1979, revised and brought up to date with current CITES listings Restrictions: Distribution: JNCC report collection 2 copies Nature Conservancy Council for England, HQ, Library 1 copy Scottish Natural Heritage, HQ, Library 1 copy Countryside Council for Wales, HQ, Library 1 copy A T Smail, Copyright Libraries Agent, 100 Euston Road, London, NWl 2HQ 5 copies British Library, Legal Deposit Office, Boston Spa, Wetherby, West Yorkshire, LS23 7BQ 1 copy Chadwick-Healey Ltd, Cambridge Place, Cambridge, CB2 INR 1 copy BIOSIS UK, Garforth House, 54 Michlegate, York, YOl ILF 1 copy CITES Management and Scientific Authorities of EC Member States total 30 copies CITES Authorities, UK Dependencies total 13 copies CITES Secretariat 5 copies CITES Animals Committee chairman 1 copy European Commission DG Xl/D/2 1 copy World Conservation Monitoring Centre 20 copies TRAFFIC International 5 copies Animal Quarantine Station, Heathrow 1 copy Department of the Environment (GWD) 5 copies Foreign & Commonwealth Office (ESED) 1 copy HM Customs & Excise 3 copies M Bradley Taylor (ACPO) 1 copy ^\(\\ Joint Nature Conservation Committee Report No. -
Performance Report-2010-English
1 2 List of Tables Page Table 1.1: Special Project Proposals Qualified for Funding 5 Table 1.2: Progress of Action Plan Activities in 2010. 6 Table 2.1: Rehabilitation and Construction of Water Bodies in 2010 7 Table 2.2: Rehabilitation of PA Road Network in 2010 8 Table 2.3: Survey and Demarcation of Protected Area Boundaries in 2010. 9 Table 2.4: Sign Boards Established in 2010 10 Table 2.5: Management of Grasslands in Wildlife Regions in 2010 11 Table 2.6: Removal of Invasive Species in 2010 11 Table 2.7: Maintenance of Fire Belts in 2010 11 Table 2.8: Wildlife Conservation Activities under Moragahakanda Project in 2010 12 Table 2.9: Wildlife Conservation Activities under Weheragala Project in 2010 12 Table 3.1: Number of Cases Prosecuted in 2010 14 Table 3.2: Progress of Action Plan Activities for 2010 15 Table 4.1: Regional Distribution of Elephant Deaths from 2006-2010 16 Table 4.2: Regional Distribution of Human Deaths 17 Table 4.3: Regional Distribution of Injuries to Human due to Elephant Attacks (2006-2010) 18 Table 4.4: Regional Distribution of Property Damages (2006-2010) 19 Table 4.5: New Electric Fences erected in 2010 21 Table 4.6: Procurement of Thunder Flares and Serphent Flares in 2010 22 Table 4.7: Distribution of the Thunder Flares and Serphent Flares in 2010 22 Table 4.8: Compensation Paid in 2010 22 Table 4.9: Capture and Translocation of Elephants in 2010 23 Table 4.10: Elephant Drives in 2010 24 Table 4.11: Gajamithuro Project – Progress in 2010 24 Table 5.1: Research Studies Undertaken by DWC Staff in 2010 26 Table 5.2: Collaborative Research Projects for 2010 27 Table 5.3: Short-term Special Training Programmes Conducted for Wildlife Officers in 2010 29 Table 5.4 : Regular Training Programmes Conducted at NWTRC in 2010 30 Table 5.5 Awareness programmes conducted by NWTRC 31 Table 5.6 Financial Progress of NWTRC 31 Table 5.7: Foreign Training Programmes Participated by Wildlife Officers in 2010 32 Table 5.8: Seminars, Exhibitions and Awareness Programmes Conducted in 2010. -
Taxonomic Checklist of CITES Listed Coral Species Part II
CoP16 Doc. 43.1 (Rev. 1) Annex 5.2 (English only / Únicamente en inglés / Seulement en anglais) Taxonomic Checklist of CITES listed Coral Species Part II CORAL SPECIES AND SYNONYMS CURRENTLY RECOGNIZED IN THE UNEP‐WCMC DATABASE 1. Scleractinia families Family Name Accepted Name Species Author Nomenclature Reference Synonyms ACROPORIDAE Acropora abrolhosensis Veron, 1985 Veron (2000) Madrepora crassa Milne Edwards & Haime, 1860; ACROPORIDAE Acropora abrotanoides (Lamarck, 1816) Veron (2000) Madrepora abrotanoides Lamarck, 1816; Acropora mangarevensis Vaughan, 1906 ACROPORIDAE Acropora aculeus (Dana, 1846) Veron (2000) Madrepora aculeus Dana, 1846 Madrepora acuminata Verrill, 1864; Madrepora diffusa ACROPORIDAE Acropora acuminata (Verrill, 1864) Veron (2000) Verrill, 1864; Acropora diffusa (Verrill, 1864); Madrepora nigra Brook, 1892 ACROPORIDAE Acropora akajimensis Veron, 1990 Veron (2000) Madrepora coronata Brook, 1892; Madrepora ACROPORIDAE Acropora anthocercis (Brook, 1893) Veron (2000) anthocercis Brook, 1893 ACROPORIDAE Acropora arabensis Hodgson & Carpenter, 1995 Veron (2000) Madrepora aspera Dana, 1846; Acropora cribripora (Dana, 1846); Madrepora cribripora Dana, 1846; Acropora manni (Quelch, 1886); Madrepora manni ACROPORIDAE Acropora aspera (Dana, 1846) Veron (2000) Quelch, 1886; Acropora hebes (Dana, 1846); Madrepora hebes Dana, 1846; Acropora yaeyamaensis Eguchi & Shirai, 1977 ACROPORIDAE Acropora austera (Dana, 1846) Veron (2000) Madrepora austera Dana, 1846 ACROPORIDAE Acropora awi Wallace & Wolstenholme, 1998 Veron (2000) ACROPORIDAE Acropora azurea Veron & Wallace, 1984 Veron (2000) ACROPORIDAE Acropora batunai Wallace, 1997 Veron (2000) ACROPORIDAE Acropora bifurcata Nemenzo, 1971 Veron (2000) ACROPORIDAE Acropora branchi Riegl, 1995 Veron (2000) Madrepora brueggemanni Brook, 1891; Isopora ACROPORIDAE Acropora brueggemanni (Brook, 1891) Veron (2000) brueggemanni (Brook, 1891) ACROPORIDAE Acropora bushyensis Veron & Wallace, 1984 Veron (2000) Acropora fasciculare Latypov, 1992 ACROPORIDAE Acropora cardenae Wells, 1985 Veron (2000) CoP16 Doc. -
Highly Variable Taxa-Specific Coral Bleaching Responses to Thermal
Vol. 648: 135–151, 2020 MARINE ECOLOGY PROGRESS SERIES Published August 27 https://doi.org/10.3354/meps13402 Mar Ecol Prog Ser OPEN ACCESS Highly variable taxa-specific coral bleaching responses to thermal stresses Timothy R. McClanahan1,*, Emily S. Darling1,2, Joseph M. Maina3, Nyawira A. Muthiga1, Stephanie D’agata1,3, Julien Leblond1, Rohan Arthur4,5, Stacy D. Jupiter1,6, Shaun K. Wilson7,8, Sangeeta Mangubhai1,6, Ali M. Ussi9, Mireille M. M. Guillaume10,11, Austin T. Humphries12,13, Vardhan Patankar14,15, George Shedrawi16,17, Julius Pagu18, Gabriel Grimsditch19 1Wildlife Conservation Society, Marine Program, Bronx, NY 10460, USA 2Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON M5S 3B2, Canada 3Faculty of Science and Engineering, Department of Earth and Environmental Science, Macquarie University, Sydney, NSW 2109, Australia 4Nature Conservation Foundation, Amritha 1311, 12th Main, Vijaynagar 1st Stage Mysore 570017, India 5Center for Advanced Studies (CEAB), C. d’Acces Cala Sant Francesc, 14, 17300 Blanes, Spain 6Wildlife Conservation Society, Melanesia Program, 11 Ma’afu Street, Suva, Fiji 7Marine Science Program, Department of Biodiversity, Conservation and Attractions, Kensington, WA 6101, Australia 8Oceans Institute, University of Western Australia, Crawley, WA 6009, Australia 9Department of Natural Sciences, The State University of Zanzibar, Zanzibar, Tanzania 10Muséum National d’Histoire Naturelle, Aviv, Laboratoire BOREA MNHN-SU-UCN-UA-CNRS-IRD EcoFunc, 75005 Paris, France 11Laboratoire d’Excellence -
Chelmon Rostratus (Linnaeus, 1758) Coradion Altivelis Mcculloch, 1916
click for previous page 3258 Bony Fishes Chelmon rostratus (Linnaeus, 1758) En - Copperbanded butterflyfish. Maximum total length about 20 cm. Inhabits coral reefs at depths of 3 to 20 m. Feeds on crabs, worms, and other invertebrates; usually in pairs. Frequently exported through the aquarium trade. Distributed from the Andaman Sea eastward throughout the Indo-Malayan region, northward to southern Japan and the Great Barrier Reef. Coradion altivelis McCulloch, 1916 En - Highfin coralfish; Fr - Coradion à grande voile. Maximum total length about 15 cm. Inhabits outer reef slopes and drop-offs at depths of 3 to 15 m. Omnivorous; usually in pairs. Rarely exported through the aquarium trade. Distributed from the Andaman Sea eastward throughout the Indo-Malayan region, northward to southern Japan and the Great Barrier Reef. Perciformes: Percoidei: Chaetodontidae 3259 Coradion chrysozonus (Kuhl and van Hasselt in Cuvier, 1831) En - Orangebanded coralfish. Maximum total length about 15 cm. Inhabits outer reef slopes and drop-offs at depths of 3 to 15 m. Omnivorous; usually in pairs. Rarely exported through the aquarium trade. Distributed from the Andaman Sea eastward throughout the Indo-Malayan region, northward to southern Japan and the Great Barrier Reef. Coradion melanopus (Cuvier, 1831) En - Two-eyed coralfish. Maximum total length about 13 cm. Inhabits lagoons and coral reefs at depths of 3 to 15 m. Omnivorous; usually in pairs. Rarely exported through the aquarium trade. Distributed throughout the Indo-Malayan region eastward to Papua New Guinea. 3260 Bony Fishes Forcipiger flavissimus Jordan and McGregor, 1898 En - Forcepsfish; Fr - Chelmon à long bec. Maximum total length about 15 cm. -
Protection of Coral Reefs and Related Ecosystems for Sustainable Livelihoods and Development – Australian Submission
Secretary-General’s report: Protection of coral reefs and related ecosystems for sustainable livelihoods and development – Australian submission The United Nations General Assembly (UNGA) Resolution 65/150 “Protection of coral reefs for sustainable livelihoods and development” was initiated by Australia working in close partnership with Pacific countries that may be directly affected by the health of coral reefs and related ecosystems. It was adopted by consensus in the UNGA on 25 November 2010, with co-sponsors comprising 84 States from the Pacific, Caribbean, Africa, the Americas, Asia and Europe. The resolution called for urgent action for the protection of coral reefs and related ecosystems. It also requested the United Nations (UN) Secretary-General to prepare a report on the issue. Australia considers this report as a timely opportunity to highlight the social, economic and environmental benefits of protecting coral reefs and related ecosystems and the urgent need for action to address the alarming trend in threats to the world’s coral reefs and related ecosystems. The United Nations Conference on Sustainable Development (the Rio+20 Conference) will be an important opportunity to secure a strong global outcome for coral reefs and related ecosystems, and recognition of their critical role for securing sustainable livelihoods and development, particularly in small island developing countries. A strong outcome for coral reefs and related ecosystems must be a global response. The main threats to coral reefs and related ecosystems include climate change, catchment runoff, coastal development and under-regulated fishing. For further details see Attachment A . The extent and persistence of damage to coral reef ecosystems will depend on change in the world’s climate and on the resilience of coral reef ecosystems. -
Estimates of Sponge Consumption Rates on an Indo-Pacific Reef
Vol. 672: 123–140, 2021 MARINE ECOLOGY PROGRESS SERIES Published August 19 https://doi.org/10.3354/meps13786 Mar Ecol Prog Ser Estimates of sponge consumption rates on an Indo-Pacific reef Charlotte Mortimer1, Matthew Dunn2, Abdul Haris3, Jamaluddin Jompa3, James Bell1,* 1School of Biological Sciences, Victoria University of Wellington, Wellington 6012, New Zealand 2The National Institute of Water and Atmospheric Research (NIWA), Wellington 6021, New Zealand 3Universitas Hasanuddin, Department of Marine Science, Makassar 90245, Indonesia ABSTRACT: Determining predator diets is essential for understanding the strength of top-down processes and how they cascade through food webs. This is especially important for sponges, key members of benthic communities, whose dominance has increased in recent years on some coral reefs. However, the diversity of spongivorous fishes and the sponges they consume are relatively unknown. Here, we estimated sponge consumption by spongivorous fishes in the Wakatobi Marine National Park, Indonesia. We deployed cameras to identify fish biting at the dominant reef sponge Xestospongia spp. and then used gut content analysis and fish abundance estimates to quantify sponge consumption. In total, 33 species from 10 families of reef fish were identified taking bites from Xestospongia spp.; however, the 2 most prolific sponge-grazers, Ctenochaetus binotatus and Chaetodon kleinii, had no sponge in their guts, showing that for some fish, bites on sponge surfaces are not reliable evidence of sponge consumption. Gut contents indicated that Pygoplites diacanthus was an obligate spongivore, while Pomacanthus imperator, P. xanthometo- pon, Zanclus cornutus and Siganus punctatus regularly consumed sponges. Sponge consumption by these 5 spongivores was estimated at 46.6 ± 18.3 g sponge 1000 m−2 d−1.