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dc.contributor.advisorYoshioka, Paul M.
dc.contributor.authorLopez-Ortiz, Ricardo
dc.date.accessioned2019-01-17T16:56:45Z
dc.date.available2019-01-17T16:56:45Z
dc.date.issued2009
dc.identifier.urihttps://hdl.handle.net/20.500.11801/1666
dc.description.abstractFrom four visits to Monito Islet in the Isla de Mona Natural Reserve, the prey description (diversity, dominance, importance, length, taxonomy and volume), the dietary niche (breadth, contribution and overlap) and the feeding strategy were studied through regurgitation analysis of three pelagic bird species roosting and nesting in sympatry, and constituting the genus Sula in the West Indies. This population consumed approximately 28,466 organisms (2.4 metric tons or 17 organisms per bird) per day. Food was abundant and the species differed in diets and feeding strategies. The masked booby (S. dactylatra) regurgitated the largest organisms, with a diet dominated by the clearwing flyingfish (Cypselerus comatus). Both the brown (S. leucogaster) and the red-footed booby (S. sula) were generalists and regurgitated organisms similar in size, mostly mackerel scad (Decapterus macarellus) and the sailfin flyingfish (Parexocoetus hillianus), respectively. At the prey family level, the diets were similar in oligotrophic zones of the Pacific Ocean. Prey volume was highest in visits at breeding peaks, especially in the masked booby. Their diets were similar to the diet reported for dolphinfish (Coryphaena hippurus) in contrast to yellowfin tuna (Thunnus albacares). The evidence suggests each species feeds from a different resource. The findings have implications in the use of seabirds as indicators of epipelagic fish stock fluctuations.en_US
dc.description.abstractDe cuatro visitas al Islote Monito en la Reserva Natural de Isla de Mona, la descripción de presa (diversidad, dominancia, importancia, largo, taxonomía y volumen), el nicho dietético (amplitud, contribución y solapamiento) y la estrategia de alimentación fueron estudiados a través del análisis de regurgitaciones de tres especies de aves pelágicas que anidan y pernoctan en simpatría; constituyendo el género Sula en las Indias Occidentales. Esta población consumió aproximadamente 28,466 organismos (2.4 toneladas métricas ó 17 organismos por ave) por día. El alimento fue abundante y las especies contrastaron en dietas y estrategias de alimentación. La boba enmascarada (S. dactylatra) regurgitó los organismos más grandes, con una dieta dominada por el pez volador holandés (Cypselerus comatus). Ambas, la boba prieta (S. leucogaster) y la blanca (S. sula) fueron generalistas y regurgitaron organismos similares en tamaños, mayormente macarela caballa (Decapterus macarellus) y el pez volador aletón (Parexocoetus hillianus), respectivamente. A nivel de familia de presa, los organismos regurgitados fueron similares en zonas oligotróficas del Océano Pacifico. El volumen de la presa fue mayor durante los picos reproductivos, especialmente en la boba enmascarada. Sus dietas fueron similares a la reportada para el dorado (Coryphaena hippurus) en contraste con el rabil (Thunnus albacares). La evidencia sugiere que cada especie se alimenta de un recurso distinto. Estos resultados tienen implicaciones en el uso de aves marinas como indicadoras de la reserva de peces epipelágicos.en_US
dc.description.sponsorshipThe Sea Grant Program (project number 5-35648); Puerto Rico Department of Natural and Environmental Resources (DNER); Mona Aquatic Inc.; Old Dominion University; FAO-FIRMen_US
dc.language.isoenen_US
dc.subjectRed-footed booby - Food habits - Mona Island (P.R.)en_US
dc.subjectMasked booby - Feeding behavior - Mona Island (P.R.)en_US
dc.subjectBrown booby - Foraging behavior - Mona Island (P.R.)en_US
dc.subjectPelagic bird species - Mona Island (P.R.)en_US
dc.subject.lcshBoobies (Birds) -- Puerto Rico -- Mona Islanden_US
dc.subject.lcshSulidae --Food --- Puerto Rico -- Mona Islanden_US
dc.titleThe diet of masked, brown and red-footed boobies (sulidae: pelecaniformes) in the mona passage, Puerto Ricoen_US
dc.rights.licenseAll rights reserveden_US
dc.rights.holder(c) 2009 Ricardo López-Ortizen_US
dc.contributor.committeeAponte, Nilda E.
dc.contributor.committeeAppeldoorn, Richard S.
dc.contributor.committeeWilliams, Lucy Bunkley
dc.contributor.representativeMuñoz, Miguel A.
thesis.degree.levelPh.D.en_US
thesis.degree.disciplineMarine Sciencesen_US
dc.type.thesisDissertationen_US
dc.contributor.collegeCollege of Arts and Sciences - Sciencesen_US
dc.contributor.departmentDepartment of Marine Sciencesen_US
dc.description.graduationSemesterFallen_US
dc.description.graduationYear2009en_US


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