Variability of size and food type of Acanthaster planci (Echinodermata: Asteroidea) in the southern Gulf of California, Mexico
DOI:
https://doi.org/10.15517/rbt.v69iSuppl.1.46352Keywords:
crown of thorns starfish; food availability; reefs; size structure; Eastern Tropical Pacific.Abstract
Introduction: Little is known about the biology and population dynamics of Acanthaster planci in Mexico. Its size is considered relevant because it is related to consumption rate. Objective: To describe the variability of the disk diameter and food type of the species in four sampling sites in the southern Gulf of California. Methods: Each site was visited on a monthly basis from February 2008 to March 2009. Disk diameter was registered from a total of 389 observed specimens. Measurements included only the main disk from side to side where the arms begin. A flexible tape was used to measure disk diameter. Three size groups were created for easier explanations: small (< 15 cm), medium (16-25 cm), and large (> 26 cm). From the total, only 298 asteroids were feeding. Preyed organisms were classified in hard corals, other invertebrates, and algae. The Simpson’s Diversity Index was used to calculate the probability that any specimen would be feeding on different types of organisms. A permutational analysis of variance was used to detect differences of disk diameter amongst months and study sites. Results: This population of Acanthaster planci had an average disk diameter = 18.23 + 0.21 cm, with a minimum of 7 cm and maximum of 36 cm. Size structure was unimodal and largely dominated by medium sized specimens, followed by small ones. The larger were less frequent. Disk diameter was statistically higher in February and lower in the last months of the year. San Rafaelito was the site with the largest and Ensenada de Muertos with the smallest organisms. Medium sized individuals were dominant throughout the year and sampling sites. The small sized fed significantly more on Porites panamensis and coralline algae and turf. Larger specimens had the lowest diversity values, more than 90 % of this size group fed on Pocillopora spp. and very few on macroalgae. Medium sized specimens showed the highest diversity, feeding on all the food types, although as expected, many of them were selective to Pocillopora spp. Conclusions: Acanthaster planci can be considered a medium sized species in the study area. There is an evident food selectivity regarding disk diameter size. The three size groups were positively selective to hard corals, but only the small favored Porites panamensis; and together with large individuals, they had the lowest diversity on food types, whereas medium sized asteroids fed on a high diversity of prey.
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Alvarado, J.J., Guzman, H.M., & Breedy, O. (2012). Distribución y diversidad de equinodermos (Asteroidea, Echinoidea, Holothuroidea) en las islas del Golfo de Chiriquí, Panamá. Revista de Biología Marina y Oceanografía, 47(1), 13-22. DOI: https://doi.org/10.4067/S0718-19572012000100002
Alvarado, J.J., Beita-Jiménez, A., Mena, S., Fernández-García, C., Guzman-Mora, A.G., & Cortés, J. (2016). Ecosistemas coralinos del Parque Nacional Isla del Coco, Costa Rica: estructura y comparación 1987-2014. Revista de Biología Tropical, 64(1), S153-S175. DOI: https://doi.org/10.15517/rbt.v64i1.23423
Álvarez-Borrego, S., & Lara-Lara, J.R. (1991). The physical environment and productivity of the Gulf of California. En J.P. Dauphin & B. Simoneit (Eds.), The Gulf and Peninsular Province of the Californias (pp. 555-567). Oklahoma, E.U.A: The American Association of Petroleum Geologists. DOI: https://doi.org/10.1306/M47542C26
Álvarez-Borrego, S. (2012). Phytoplankton biomass and production in the Gulf of California: a review. Botanica Marina, 55(2), 119-128. DOI: https://doi.org/10.1515/bot.2011.105
Babcock, R.C., Milton, D.A., & Pratchett, M.S. (2016a). Relationships between size and reproductive output in the crown-of-thorns starfish. Marine Biology, 163(234), 1-7. DOI: https://doi.org/10.1007/s00227-016-3009-5
Babcock, R.C., Dambacher, J.M., Morello, E.B., Plagányi, É.E., Hayes, K.R., Sweatman, H.P.A., & Pratchett, M.S. (2016b). Assessing different causes of crown-of-thorns starfish outbreaks and appropriate responses for management on the Great Barrier Reef. PLoS ONE, 11(12), e0169048. DOI: https://doi.org/10.1371/journal.pone.0169048
Barham, E.G., Gowdy, R.W., & Wolfson, F.H. (1973). Acanthaster (Echinodermata, Asteroidea) in Gulf of California. Fishery Bulletin, 71(4), 927-942.
Barnes, J.H. (1966). The crown-of-thorns starfish as a destroyer of coral. Australian Natural History, 15, 257-261.
Bos, A.R., Gumanao, G.S., Mueller, B., & Saceda-Cardoza, M.M. (2013). Management of crown-of-thorns sea star (Acanthaster planci L.) outbreaks: removal success depends on reef topography and timing within the reproduction cycle. Ocean & Coastal Management, 71, 116-122. DOI: https://doi.org/10.1016/j.ocecoaman.2012.09.011
Branham, J.M., Reed, S.A., Bailey, J.H., & Caperon, J. (1971). Coral-eating sea stars Acanthaster planci in Hawaii. Science, 172(3988), 1155-1157. DOI: https://doi.org/10.1126/science.172.3988.1155
Brauer, R.W., M.J. Jordan, & Barnes, D.J. (1970). Triggering of the stomach eversion reflex of Acanthaster planci by coral extracts. Nature, 228, 344-346. DOI: https://doi.org/10.1038/228344a0
Bruno, J.F., & Selig, E.R. (2007). Regional decline of coral cover in the Indo-Pacific: timing, extent, and subregional comparisons. PLoS ONE, 2(8), e711. DOI: https://doi.org/10.1371/journal.pone.0000711
Carrillo-Domínguez, S., Casas-Valdez, M., Ramos-Ramos, F., Pérez-Gil, F., & Sánchez-Rodríguez, I. (2002). Algas marinas de Baja California Sur, México: Valor nutrimental. Archivos Latinoamericanos de Nutrición, 52(4), 400-405.
Caso, M.E. (1961). Estado actual de los conocimientos acerca de los equinodermos de México (tesis doctoral). Universidad Nacional Autónoma de México, México.
Caso, M.E. (1962). Estudios sobre asteridos de México. Observaciones sobre especies Pacíficas del género Acanthaster y descripción de una subespecie nueva, Acanthaster ellisii pseudoplanci. Anales del Instituto de Biología, Universidad Nacional Autónoma de México, 32(1-2), 313-331.
Chess, J.R., Hobson, E.S., & Howard, D.F. (1997). Interactions between Acanthaster planci (Echinodermata, Asteroidea) and scleractinian corals at Kona, Hawai’i. Pacific Science, 51(2), 121-133.
Cintra-Buenrostro, C.E., Reyes-Bonilla, H., & Herrero-Pérezrul, M.D. (2005). Oceanographic conditions and diversity of sea stars (Echinodermata: Asteroidea) in the Gulf of California, Mexico. Revista de Biología Tropical, 53(3), 245-261.
Dana, T., & Wolfson, A.A. (1970). Eastern Pacific crown-of-thorns starfish populations in the lower Gulf of California. Transactions of the San Diego Society of Natural History, 16(4), 83-90. DOI: https://doi.org/10.5962/bhl.part.15455
Dana, T.F., Newman, W.A., & Fager, E.W. (1972). Acanthaster aggregations: Interpreted as primarily responses to natural phenomena. Pacific Science, 26, 355-372.
De Alba, C. (1978). Predación de coral por la estrella de mar corona de espinas Acanthaster ellisii (Gray) en el área de Bahía de La Paz. México: Memorias I Simposio de Biología Marina, UABCS.
De’ath, G., & Moran, P.J. (1998). Factors affecting the behaviour of crown-of-thorns starfish (Acanthaster planci L.) on the Great Barrier Reef: 2: Feeding preferences. Journal of Experimental Marine Biology and Ecology, 220(1), 107-126. DOI: https://doi.org/10.1016/S0022-0981(97)00100-7
De’ath, G., Fabricius, K.E., Sweatman, H., & Puotinen, M. (2012). The 27–year decline of coral cover on the Great Barrier Reef and its causes. Proceedings of the National Academy of Sciences, 109(44), 17995-17999. DOI: https://doi.org/10.1073/pnas.1208909109
Díaz-Martínez, J.P., Carpizo-Ituarte, E.J., & Benítez-Villalobos, F. (2019). Reproductive patterns of the black starry sea urchin Arbacia stellata in Punta Banda, Baja California, Mexico. Journal of the Marine Biological Association of the United Kingdom, 99(6), 1379-1391. DOI: https://doi.org/10.1017/S0025315419000316
Domínguez-Orozco, A.L., & Tripp-Quezada, A. (1997). Estructura de la comunidad de macroinvertebrados bentónicos de la Caleta de Balandra, Bahía de La Paz, BCS. En R.J. Urbán & M. Ramírez (Eds.), La Bahía de La Paz, Investigación y Conservación (pp. 119-127). La Paz: UABCS, CICIMAR, Scripps Institution of Oceanography.
Engelhardt, U., Hartcher, M., Taylor, N., Cruise, J., Engelhardt, D., Russell, M., Stevens, I., Thomas, G., Williams D., & Wiseman, D. (2001). Crown-of-thorns starfish (Acanthaster planci) in the central Great Barrier Reef region. Results of fine-scale surveys conducted in 1999-2000. Australia: CRC Reef Research Centre Technical Report No. 32.
Escalante, F., Valdez-Holguín, J.E., Álvarez-Borrego, S., & Lara-Lara, J.R. (2013). Temporal and spatial variation of sea surface temperature, chlorophyll a, and primary productivity in the Gulf of California. Ciencias Marinas, 39(2), 203-215. DOI: https://doi.org/10.7773/cm.v39i2.2233
Espinosa-Carreón, T.L., & Valdez-Holguín, E. (2007). Variabilidad interanual de clorofila en el Golfo de California. Ecología Aplicada, 6(1-2), 83-92. DOI: https://doi.org/10.21704/rea.v6i1-2.344
Fabricius, K.E., Okaji, K., & De’ath, G. (2010). Three lines of evidence to link outbreaks of the crown-of-thorns seastar Acanthaster planci to the release of larval food limitation. Coral Reefs, 29(3), 593-605. DOI: https://doi.org/10.1007/s00338-010-0628-z
Fox, J., & Bouchet-Valat, M. (2020). Rcmdr: R Commander. R package version 2.6-2. Recuperado de https://cran.r-project.org/web/packages/Rcmdr/index.html.
Glynn, P.W. (1974). The impact of Acanthaster on corals and coral reefs in the eastern Pacific. Environmental Conservation, 1(4), 295-304. DOI: https://doi.org/10.1017/S037689290000494X
Glynn, P.W. (1982). Individual recognition and phenotypic variability in Acanthaster planci (Echinodermata: Asteroidea). Coral Reefs, 1(2), 89-94. DOI: https://doi.org/10.1007/BF00301690
Glynn, P.W., Veron, J.E.N., & Wellington, G.M. (1996). Clipperton Atoll (eastern Pacific): oceanography, geomorphology, reef-building coral ecology and biogeography. Coral Reefs, 15(2), 71-99. DOI: https://doi.org/10.1007/BF01771897
Glynn, P.W. (2003). Coral communities and coral reefs of Ecuador. En J. Cortés (Ed.). Latin American coral reefs (pp. 449-472). Países Bajos: Elsevier Science. DOI: https://doi.org/10.1016/B978-044451388-5/50020-5
Guzmán, H.M., & Cortés, J. (1989). Coral reef community structure at Caño Island, Pacific Costa Rica. Marine Ecology, 10(1), 23-41. DOI: https://doi.org/10.1111/j.1439-0485.1989.tb00064.x
Herrera-Escalante, T. (2005). Dinámica poblacional y reproducción de la estrella de mar Phataria unifascialis (Gray 1840) (Echinodermata: Asteroidea) en Pichilingue, Bahía de La Paz, Baja California Sur, México (Tesis de Maestría). Centro Interdisciplinario de Ciencias Marinas del Instituto Politécnico Nacional, México.
Herrero-Pérezrul, M.D., Reyes-Bonilla, H., García-Domínguez, F., & Cintra-Buenrostro, C.E. (1999). Reproduction and growth of Isostichopus fuscus (Echinodermata: Holothuroidea) in the southern Gulf of California, Mexico. Marine Biology, 135, 521-532. DOI: https://doi.org/10.1007/s002270050653
Herrero-Pérezrul, M.D., & Chávez, E.A. (2005). Optimum fishing strategies for Isostichopus fuscus (Echinodermata: Holothuroidea) in the Gulf of California, México. Revista de Biología Tropical, 53(3), 357-366.
Herrero-Pérezrul M.D., Rojero-León S., & Reyes-Bonilla, H. (2010) Community structure of conspicuous echinoderms of three islands from the Gulf of California, Mexico. En L.G. Harris, S.A. Böttger, C.W. Walker, & M.P. Lesser (Eds.), Echinoderms: Durham. Proceedings of the 12th International Echinoderm Conference (pp. 615-620). Leiden: CRC Press, Taylor and Francis group, Balkema. DOI: https://doi.org/10.1201/9780203869543-c91
Honey-Escandón, M., Solís-Marín, F.A., & Laguarda-Figueras, A. (2008). Equinodermos (Echinodermata) del Pacífico Mexicano. Revista de Biología Tropical, 56(3), 57-73.
Johnson, C.R., & Sutton, D.C. (1994). Bacteria on the surface of crustose coralline algae induce metamorphosis of the crown-of-thorns starfish Acanthaster planci. Marine Biology, 120(2), 305-310. DOI: https://doi.org/10.1007/BF00349692
Johansson, C.L., Francis, D.S., & Uthicke, S. (2016). Food preferences of juvenile corallivorous crown-of-thorns (Acanthaster planci) sea stars. Marine Biology, 163, 49. DOI: https://doi.org/10.1007/s00227-016-2823-0
Kayal, M., Lenihan, H.S., Pau, C., Penin, L., & Adjeroud, M. (2011). Associational refuges among corals mediate impacts of a crown-of-thorns starfish Acanthaster planci outbreak. Indirect positive interactions in communities. Coral Reefs, 30(3), 827-837. DOI: https://doi.org/10.1007/s00338-011-0763-1
Kayal, M., Vercelloni, J., Lison de Loma, T., Bosserelle, P., Chancerelle, Y., Geoffroy, S., Stievenart, C., Michonneau, F., Penin, L., Planes, S., & Adjeroud, M. (2012). Predator crown-of-thorns starfish (Acanthaster planci) outbreak, mass mortality of corals, and cascading effects on reef fish and benthic communities. PLoS ONE, 7(10), e47363. DOI: https://doi.org/10.1371/journal.pone.0047363
Keesing, J.K. (1990). Feeding biology of the crown-of-thorns starfish, Acanthaster planci (Linnaeus) (Tesis de Doctorado). James Cook University, Australia.
Keesing, J.K., & Lucas, J.S. (1992). Field measurement of feeding and movement rates of the crown-of-thorns starfish Acanthaster planci (L.). Journal of Experimental Marine Biology and Ecology, 156(1), 89-104. DOI: https://doi.org/10.1016/0022-0981(92)90018-6
Kettle, B.T., & Lucas, J.S. (1987). Biometric relationships between organ indices, fecundity, oxygen consumption and body size in Acanthaster planci (L.) (Echinodermata; Asteroidea). Bulletin of Marine Science, 41(2), 541-551.
Krebs, C.J. (1999). Ecological Methodology (2a Ed.). California, E.U.A.: Addison Wesley Longman, Menlo Park.
Lamy, T., Galzin, R., Kulbicki, M., Lison de Loma, T., & Claudet, J. (2016). Three decades of recurrent declines and recoveries in corals belie ongoing change in fish assemblages. Coral Reefs, 35(1), 293-302. DOI: https://doi.org/10.1007/s00338-015-1371-2
Leray, M., Béraud, M., Anker, A., Chancerelle, Y., & Mills, S.C. (2012). Acanthaster planci outbreak: decline in coral health, coral size structure modification and consequences for obligate decapod assemblages. PLoS ONE, 7(4), e35456. DOI: https://doi.org/10.1371/journal.pone.0035456
Lucas, J.S. (1982). Quantitative studies of feeding and nutrition during larval development of the coral reef asteroid Acanthaster planci (L.). Journal of Experimental Marine Biology and Ecology, 65(2), 173-193. DOI: https://doi.org/10.1016/0022-0981(82)90043-0
Luna-Salguero, B.M., & Reyes-Bonilla, H. (2010). Community and trophic structure of sea stars (Echinodermata: Asteroidea) in rocky reefs of Loreto, Gulf of California, Mexico. Hidrobiológica, 20(2), 127-134.
MacNeil, M.A., Mellin, C., Pratchett, M.S., Hoey, J., Anthony, K.R., Cheal, A.J., Miller, I., Sweatman, H., Cowan, Z.L., Taylor, S., Moon, S., & Fonnesbeck, C.J. (2016). Joint estimation of crown of thorns (Acanthaster planci) densities on the Great Barrier Reef. PeerJ, 4, e2310. DOI: https://doi.org/10.7717/peerj.2310
Maluf, L.Y. (1988). Composition and distribution of the central Eastern Pacific Echinoderms. Natural History Museum of Los Angeles County, Technical Reports, 2, 1-242.
Martínez-Flores, G., Cervantes-Duarte, R., & González-Rodríguez, E. (2006). Análisis de temperatura superficial del mar en la Bahía de La Paz, Baja California Sur. Naturaleza y Desarrollo, 4(2), 26-34.
Mauzey, K., Birkland, C. & Dayton, P. (1968). Feeding behavior of asteroids and escape responses of their prey in the Puget Sound region. Ecology, 49(4), 603-619. DOI: https://doi.org/10.2307/1935526
Miller, I. (2002). Historical patterns and current trends in the broadscale distribution of crown-of-thorns starfish in the northern and central sections of the Great Barrier Reef. Proceedings of the 9th International Coral Reef Symposium, 2, 1273-1279.
Miller, I.R., Jonker M., & Coleman, G. (2009). Crown-of-thorns starfish and coral surveys using the manta tow and SCUBA search techniques. Townsville, Australia: Australian Institute of Marine Science.
Moore, R.J. (1990). Persistent and transient populations of the crown-of-thorns starfish, Acanthaster planci. En R.H. Bradbury (Ed.), Acanthaster and the Coral Reef: A theoretical perspective (pp. 236-277). Heidelberg: Springer. DOI: https://doi.org/10.1007/978-3-642-46726-4_15
Nakamura, M., Kumagai, N.H., Sakai, K., Okaji, K., Ogasawara, K., & Mitarai, S. (2015). Spatial variability in recruitment of acroporid corals and predatory starfish along the Onna coast, Okinawa, Japan. Marine Ecology Progress Series, 540, 1-12. DOI: https://doi.org/10.3354/meps11525
Narváez, K., & Zapata, F.A. (2010). First record and impact of the crown-of-thorns starfish, Acanthaster planci (Spinulosida: Acanthasteridae) on corals of Malpelo Island, Colombian Pacific. Revista de Biología Tropical, 58(1), 139-143. DOI: https://doi.org/10.15517/rbt.v58i1.20029
Palacio, F.X, Apodaca, M.J., & Crisci, J.V. (2020). Análisis Multivariado para datos biológicos: Teoría y su aplicación utilizando el lenguaje R. Buenos Aires, Argentina: Fundación de Historia Natural Félix de Azara.
Pratchett, M.S. (2005). Dynamics of an outbreak population of Acanthaster planci at Lizard Island, northern Great Barrier Reef (1995-1999). Coral Reefs, 24(3), 453-462. DOI: https://doi.org/10.1007/s00338-005-0006-4
R Core Team. (2020). R: A language and environment for statistical computing. R Foundation for Statistical Computing. Vienna, Austria. Recuperado de https://www.R-project.org/
Reichelt, R.E., Bradbury, R.H., & Moran, P.J. (1990). The crown-of-thorns starfish, Acanthaster planci, on the Great Barrier Reef. Mathematical and Computer Modelling, 13(6), 45-60. DOI: https://doi.org/10.1016/0895-7177(90)90008-B
Reyes-Bonilla, H., & Calderon-Aguilera, L.E. (1999). Population density, distribution and consumption rates of three corallivores at Cabo Pulmo Reef, Gulf of California, Mexico. Marine Ecology, 20(3-4), 347-357. DOI: https://doi.org/10.1046/j.1439-0485.1999.2034080.x
Reyes-Bonilla, H., & Herrero-Pérezrul, M.D. (2003). Population parameters of an exploited population of Isostichopus fuscus (Holothuroidea) in the southern Gulf of California, Mexico. Fisheries Research, 59(3), 423-430. DOI: https://doi.org/10.1016/S0165-7836(02)00023-1
Reyes-Bonilla, H., Calderón-Aguilera, L.E., Cruz-Piñón, G., Medina-Rosas, P., López-Pérez, R.A., Herrero Pérezrul, M.D., Leyte Morales, G.E., Cupul-Magaña, A.L., & Carriquiry-Beltrán, J.D. (2005). Atlas de corales del Pacífico Mexicano. México: CICESE, CONABIO, CONACyT, UABCS, UDG, UMAR.
Reyes-Bonilla, H., & López-Pérez, R.A. (2009). Corals and coral reef communities in the Gulf of California. En A. Johnson & J. Ledezma-Vázquez (Eds.), Atlas of coastal ecosystems in the western Gulf of California (pp. 45-57). Tucson: The University of Arizona Press.
Reyes-Bonilla, H., Calderón-Aguilera, L.E., Galaviz-López, J.M., & Herrero-Pérezrul, M.D. (2018). Size and relative condition index of the brown sea cucumber Isostichopus fuscus in the northern Gulf of California, Mexico. Latin American Journal of Aquatic Research, 46(4), 831-836. DOI: https://doi.org/10.3856/vol46-issue4-fulltext-21
Román-Palacios, C., & Román-Valencia, C. (2015). Hábitos tróficos de dos especies sintópicas de carácidos en una quebrada de alta montaña en los Andes colombianos. Revista Mexicana de Biodiversidad, 86(3), 782-788. DOI: https://doi.org/10.1016/j.rmb.2015.06.009
Saponari, L., Montalbetti, E., Galli, P., Strona, G., Seveso, D., Dehnert, I., & Montano, S. (2018). Monitoring and assessing a 2-year outbreak of the corallivorous seastar Acanthaster planci in Ari Atoll, Republic of Maldives. Environmental Monitoring and Assessment, 190(6), 344. DOI: https://doi.org/10.1007/s10661-018-6661-z
Solís-Marín, F.A., Reyes-Bonilla, H., Herrero-Pérezrul, M.D., Arizpe-Covarrubias, O., & Laguarda-Figueras, A. (1997). Systematics and distribution of the echinoderms from Bahía de la Paz. Ciencias Marinas, 23(2), 249-263. DOI: https://doi.org/10.7773/cm.v23i2.791
Stump, R. (1996). An investigation to describe the population dynamics of Acanthaster planci (L.) around Lizard Island, Cairns section, Great Barrier Reef Marine Park (No. 10). Australia: CRC Reef Research Centre.
Uthicke, S., Schaffelke B., & Byrne, M. (2009). A boom–bust phylum? Ecological and evolutionary consequences of density variations in echinoderms. Ecological Monographs, 79(1), 3-24. DOI: https://doi.org/10.1890/07-2136.1
Uthicke, S., Logan, M., Liddy, M., Francis, D., Hardy, N., & Lamare, M. (2015). Climate change as an unexpected co-factor promoting coral eating seastar (Acanthaster planci) outbreaks. Scientific Reports, 5, 8402. DOI: https://doi.org/10.1038/srep08402
Vogler, C., Benzie, J., Lessios, H., Barber, P., & Wörheide, G. (2008). A threat to coral reefs multiplied? Four species of crown-of-thorns starfish. Biology Letters, 4(6), 696-699. DOI: https://doi.org/10.1098/rsbl.2008.0454
Yamaguchi, M. (1977). Population structure, spawning, and growth of the coral reef asteroid Linckia laevigata (Linnaeus). Pacific Science, 31(1), 13-30.
Zann, L., Brodie, J., & Vuki, V. (1990). History and dynamics of the crown-of-thorns starfish Acanthaster planci (L.) in the Suva area, Fiji. Coral Reefs, 9(3), 135-144. DOI: https://doi.org/10.1007/BF00258225
Zapata, F.A., del Mar Palacios, M., Zambrano, V., & Rodríguez-Moreno, M. (2017). Filling the gaps: first record of the crown-of-thorns starfish, Acanthaster planci (Linnaeus, 1758) (Spinulosida: Acanthasteridae), at Gorgona Island, Colombia, Tropical Eastern Pacific. Check List, 13(3), 2112. DOI: https://doi.org/10.15560/13.3.2112
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