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David J. Anderson - One of the best experts on this subject based on the ideXlab platform.
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SERUM CHEMISTRY OF FREE-RANGING NAZCA BOOBIES ( SULA GRANTI).
Journal of zoo and wildlife medicine : official publication of the American Association of Zoo Veterinarians, 2017Co-Authors: Terri J. Maness, David J. AndersonAbstract:Abstract This study reports body mass and serum chemistry reference values of 121 male and 57 female Nazca boobies (Sulidae: Sula granti) from a colony on Isla Espanola, Galapagos Islands, Ecuador. Circulating aspartate aminotransferase, creatine kinase, lactate dehydrogenase, total protein, immunoglobulin Y, uric acid, blood urea nitrogen, triglycerides, cholesterol, and creatinine were quantified and analyzed by sex. Sex explained little variance in all examined variables except mass; females were heavier than males, as expected for sulids. Uric acid values had a bimodal distribution, likely reflecting differences in recent foraging success. Aspartate aminotransferase and creatine kinase values were similar to those reported in other sulids. Clinical health reference values are critical for practitioners investigating responses of seabirds to oil spills, coastal restoration efforts, or emerging diseases. These data from a species living in a relatively isolated and pristine area provide a valuable basel...
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No Extra-pair Fertilization Observed in Nazca Booby (Sula granti) Broods
The Wilson Journal of Ornithology, 2006Co-Authors: David J. Anderson, Peter T. BoagAbstract:Abstract Nazca Booby (Sula granti) broods in the Galapagos Islands showed 0% extra-pair fertilization, based on multilocus band-sharing values. The 95% CI of this estimate for all chicks was 0–0.098, and for all broods it was 0–0.139. These are the first data on extra-pair paternity to be reported for a member of the family Sulidae.
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Nesting distributions of Galápagos boobies (Aves: Sulidae): an apparent case of amensalism
Oecologia, 2002Co-Authors: Howard M. Townsend, Kathryn P. Huyvaert, Peter J. Hodum, David J. AndersonAbstract:Blue-footed boobies ( Sula nebouxii ) in the Galápagos Islands nest at coastal sites such as cliff edges if Nazca boobies ( S. granti ) are absent. However, if sympatric with nesting Nazca boobies, they nest nearby, but farther inland, in areas with little topographical relief. Nazca boobies nest at the coastal sites whether blue-footed boobies are present or not. The segregated nesting pattern of these two species offers a model system to investigate factors influencing community structure. We tested a non-interactive hypothesis, in which different fundamental niches generate the non-overlapping distributions, and an interactive hypothesis, in which the two fundamental niches overlap and an interaction between the two species causes the segregation. Data on three factors considered as likely parameters differentiating fundamental niches (nest microclimate, nature of the nesting substrate, and ease of taking flight from nest sites) failed to support the non-interactive hypothesis. These results suggest that the two species have indistinguishable fundamental niches with respect to these parameters, but different realized niches. Researchers studying resource partitioning by ecologically similar species often only consider competition (a "-/-" interaction) to explain situations like this, ignoring the more parsimonious amensal (0/-) possibility. Nesting segregation in this situation is apparently caused by attacks of non-breeding adult Nazca boobies on blue-footed booby nestlings, injuring nestlings and ultimately preventing them from fledging. The interaction does not result in any discernible costs or benefits (i.e., effects on fecundity or survival) for the adult Nazca boobies, so it is best described as an amensal interaction. This interaction provides a sufficient explanation of the observed nesting segregation, and precludes present competition for nesting space.
Vicki L. Friesen - One of the best experts on this subject based on the ideXlab platform.
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A multilocus phylogeny of the Sulidae (Aves: Pelecaniformes).
Molecular phylogenetics and evolution, 2010Co-Authors: S.a. Patterson, James A. Morris-pocock, Vicki L. FriesenAbstract:Abstract Gene trees will often differ from the true species history, the species tree, as a result of processes such as incomplete lineage sorting. New methods such as Bayesian Estimation of the Species Tree (BEST) use the multispecies coalescent to model lineage sorting, and directly infer the species tree from multilocus DNA sequence data. The Sulidae (Aves: Pelecaniformes) is a family of ten booby and gannet species with a global distribution. We sequenced five nuclear intron loci and one mitochondrial locus to estimate a species tree for the Sulidae using both BEST and by concatenating nuclear loci. We also used fossil calibrated strict and relaxed molecular clocks in BEAST to estimate divergence times for major nodes in the sulid phylogeny. Individual gene trees showed little phylogenetic conflict but varied in resolution. With the exception of the mitochondrial gene tree, no gene tree was completely resolved. On the other hand, both the BEST and concatenated species trees were highly resolved, strongly supported, and topologically consistent with each other. The three sulid genera (Morus, Sula, Papasula) were monophyletic and the relationships within genera were mostly consistent with both a previously estimated mtDNA gene tree and the mtDNA gene tree estimated here. However, our species trees conflicted with the mtDNA gene trees in the relationships among the three genera. Most notably, we find that the endemic and endangered Abbott’s booby (Papasula abbotti) is likely basal to all other members of the Sulidae and diverged from them approximately 22 million years ago.
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Phylogeny and Evolution of the Sulidae (Aves: Pelecaniformes): A Test of Alternative Modes of Speciation
Molecular phylogenetics and evolution, 1997Co-Authors: Vicki L. Friesen, D.j. AndersonAbstract:Abstract Although the allopatric model of speciation is widely accepted, it does not provide a satisfactory explanation for many evolutionary phenomena. Several alternative models exist, but they remain largely untested for vertebrate animals. In the present paper, a molecular phylogeny was used to test competing models of speciation in a seabird family, the Sulidae. A segment including 807 base pairs of the mitochondrial cytochrome b gene was sequenced from all extant sulid species, and phylogenetic methods were used to test model-specific predictions regarding tree topologies, distributions of sister taxa, timing of vicariant events, and comparative biology. Both the neighbor-joining and parsimony analyses placed sequences of gannets ( Morus spp.) and boobies of the genus Sula in separate, monophyletic lineages. Sequences of Cape ( M. capensis ) and Australasian ( M. serrator ) gannets clustered together, and the sequence of Abbott's booby ( Papasula abbotti ) was basal to those of the gannets. Sequences of blue-footed ( S. nebouxii ) and Peruvian ( S. variegata ) boobies were sisters and formed a monophyletic group with the masked booby ( S. dactylatra ). The red-footed booby ( S. sula ) sequence was the most divergent of the Sula boobies. All relationships received strong support from standard-error tests and bootstrap analysis. Substitution rates were similar to those suggested for mammals and suggested that most lineages arose within the last 3 million years. Lineage divergence events for which the mode of speciation could be deduced did not fit the predictions of either allopatric or sympatric models, but apparently involved either peripatric or parapatric processes.
Marcelo Stucchi - One of the best experts on this subject based on the ideXlab platform.
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New Miocene Sulid Birds from Peru and Considerations on their Neogene Fossil Record in the Eastern Pacific Ocean
Acta Palaeontologica Polonica, 2015Co-Authors: Marcelo Stucchi, Rafael M. Varas-malca, Mario Urbina-schmittAbstract:Boobies and gannets (family Sulidae) are the most specialized plunge divers among seabirds. Their fossil record along the Pacific coast of South America extends to the early Middle Miocene. Here we describe three new species of sulids: Sula brandi sp. nov., Sula figueroae sp. nov., and Ramphastosula aguirrei sp. nov., from the early Late Miocene of the Pisco Formation (Peru). Two of them are relatives of the living genus Sula, which represents medium and large-sized boobies. A new species of the extinct genus Ramphastosula is also described, adding to the discussion of possible alternative feeding strategies among sulids. The fossil record suggests that sympatric sulids exhibit different body sizes at least since the Oligocene epoch, a strategy related with resource partitioning. Furthermore, we find current analysis and knowledge of the fossil record unsuitable to evaluate properly seabird diversity changes through time.
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el craneo del piquero peruano sula variegata aves Sulidae
The biologist, 2013Co-Authors: Marcelo StucchiAbstract:El presente articulo describe la morfologia del craneo del piquero peruano Sula variegata (Tschudi, 1845), considerando su desarrollo ontogenico, y en comparacion con otras especies de la familia Sulidae y, de forma complementaria, con otras familias del tradicional orden Pelecaniformes: Phalacrocoracidae, Anhingidae, Fregatidae, Phaetonthidae y Pelecanidae. En las comparaciones realizadas se pudieron encontrar caracteristicas que comparte el piquero peruano con los demas miembros de la familia Sulidae, y otras que, en su conjunto, lo diferencian de las demas especies del genero Sula. Entre las primeras se tienen: (1) durante el desarrollo ontogenico cambian las proporciones entre el rostrum y la caja craneana, alargandose el primero y reduciendose la altura del segundo con respecto a este. (2) Los craneos presentan una abertura nasal en sus estadios iniciales de desarrollo, que se cierra completamente con el crecimiento del ave. La funcion respiratoria se desplaza hacia un espacio que se encuentra debajo de la fenestra pre-orbitaria y el yugal, que es protegida por la ranfoteca. (3) Los individuos adultos presentan un espacio trabeculado en la parte interna de los frontales y la mandibula superior, que le confiere resistencia al craneo. Todas estas caracteristicas les permiten a los Sulidae evitar la ruptura o pandeo del craneo ante la fuerza del impacto de la zambullida. En el segundo caso se tienen: (1) techo craneano ligeramente abovedado sobre las orbitas. (2) Cresta sagital por lo general angosta, pero ancha en algunos individuos. (3) Region temporal corta. (4) Porcion proximal del rostrum recta, delante de la sutura naso-frontal.
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Ramphastosula (Aves, Sulidae): a new genus from the early Pliocene of the Pisco Formation, Peru
Journal of Vertebrate Paleontology, 2004Co-Authors: Marcelo Stucchi, Mario UrbinaAbstract:Abstract Cranial material from a new genus (Ramphastosula) of Sulidae is described. The material comes from the Early–Lower Pliocene of the Pisco Formation of the central-southern coast of Peru. The skulls are characterized by (1) remarkable convex curvature of the dorsal surface and straight ventral surface of the rostrum, only with a curvature on the third anterior part and the tip of the bill; (2) well developed occipital and temporal regions; (3) broad opisthotic process projecting to the level of postorbital processes; (4) broad temporal fossa, and (5) flat braincase and robust frontal region.
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Ramphastosula (Aves, Sulidae): a new genus from the early Pliocene of the Pisco Formation, Peru
Journal of Vertebrate Paleontology, 2004Co-Authors: Marcelo Stucchi, Mario UrbinaAbstract:Abstract Cranial material from a new genus (Ramphastosula) of Sulidae is described. The material comes from the Early–Lower Pliocene of the Pisco Formation of the central-southern coast of Peru. The skulls are characterized by (1) remarkable convex curvature of the dorsal surface and straight ventral surface of the rostrum, only with a curvature on the third anterior part and the tip of the bill; (2) well developed occipital and temporal regions; (3) broad opisthotic process projecting to the level of postorbital processes; (4) broad temporal fossa, and (5) flat braincase and robust frontal region.
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El registro mas antiguo de Sulidae (aves) en el Peru
2003Co-Authors: Marcelo Stucchi, Thomas J. DevriesAbstract:RESUMENSe presenta el registro mAEs antiguo de Sulidae para el Perœ y AmOrica del Sur proveniente de los depositosde la base del Mioceno Medio de la formacion Chilcatay, en la costa centro - sur del Perœ. Este piquero, atribuido algOnero Sula , presenta dimensiones similares a los que habitan estas costas en la actualidad. La antiguedad estAEsustentada por la presencia de los moluscos Testallium cepa , Miltha cf. M. (Matanziella) vidali y Acanthina katzi .ABSTRACTThe oldest record of Sulidae (Aves) from Peru. The oldest Sulidae from Peru and South America is reportedfrom middle Miocene deposits of the Chilcatay Formation, on the south-central coast of Peru. This material, assignedto the genus Sula , has the same proportions as congeners who live on the same coast today. The age of the Peruvianmaterial is supported by the presence of mollusks Testallium cepa, Miltha cf. M. (Matanziella) vidali and Acanthinakatzi.INTRODUCCIONExiste una gran cantidad y diversidad de fosilesde Sulidae en el mundo, siendo sus registros mAEs antiguoslos procedentes del Eoceno tardio de Francia (Warheit2002). Para AmOrica del Sur se ha reportado Sulidae fosilesa partir del final del Mioceno medio en el nivel Cerro LaBruja (cf. Sula sp.) de la formacion Pisco (Muizon & DeVries1985). Registros mAEs recientes provienen de esta œltimaformacion (Stucchi 2003) y de Bahia Inglesa en las costacentro-norte de Chile (Walsh & Hume 2001). Recientemente,se colecto material que corresponde a la porcion manubrialdel esternon, asignado al gOnero Sula. Este proviene delos yacimientos de Pampa Santa Cruz correspondientes aniveles superiores de la formacion Chilcatay, siendo elregistro mAEs antiguo del gOnero para AmOrica del Sur ycontemporAEneo con los restos mAEs antiguos del Pacificonor-este (California, EU).GEOLOG˝A Y PALEONTOLOG˝A DE MOLUSCOSLa estratigrafia del Cenozoico de Pampa SantaCruz debe ser extrapolada desde un AErea cercana bienestudiada, como es Quebrada Gramonal (Dunbar et al. 1990;DeVries 1998) (fig. 1). En Gramonal, una falla origina bloquesde arensica de grano grueso pertenecientes a la formacionParacas (Eoceno) que estAEn cortados por una discordanciaangular y recubiertos por la formacion Chilcatay (Miocenoinferior). Estos depositos consisten en varias capas enforma de cuaea (espesor de 5-10 metros) que sonreemplazados hasta la orilla y en la parte alta de la seccionpor arenisca diatomeacea de grano fino. Los moluscosfosiles diagnosticos incluyen las especies chilenas de laformacion Navidad, Olivancellaria tumorifera (HupO1854), Glycymeris ibariformis Frassinetti & Covacevich1984 y Eucrassatella ponderosa (Philippi 1887) (DeVries& Frassinetti en prensa ).La formacion Chilcatay estAE recubierta endiscordancia angular por arenisca masiva de grano mediointercalada con capas delgadas de arenisca bioclAEstica ycerca de la base, horizontes con rocas cubiertas de ostras.Estas capas constituyen la parte mAEs baja de la formacionPisco (Mioceno medio), tipificada por moluscos de Navidadtales como, Ficus distans Sowerby 1846, y Testallium cepa(Sowerby 1846) (Covacevich & Frassinetti 1980; Vermeij &DeVries 1997) (fig. 2). Horizontes fosiliferos un poco mAEsarriba en la formacion Pisco incluyen los moluscosTurritella infracarinata Gryzbowski 1899, y Anadarasechurana (Olsson 1932) (DeVries 1997), los cuales hansido encontrados tambiOn en las capas de Cerro La Bruja(Muizon & DeVries 1985).SISTEM`TICA PALEONTOLOGICAFamilia : Sulidae (Reichenbach 1849)GOnero : Sula Brisson 176095 - 98
Stucchi Marcelo - One of the best experts on this subject based on the ideXlab platform.
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The skull of the peruvian booby sula variegata (aves, Sulidae)
ASEFIM Instituto de Capacitación y Consultoría, 2013Co-Authors: Stucchi MarceloAbstract:This paper describes the morphology of the skull of the Peruvian booby Sula variegata (Tschudi, 1845), considering its ontogeny, and compared with other species of the family Sulidae and, similarly, with other families of the traditional order Pelecaniformes: Phalacrocoracidae, Anhingidae, Fregatidae, Phaetonthidae and Pelecanidae. In the comparisons could be found characteristics which the Peruvian booby shares with other members of Sulidae, and others that, taken together, distinguish it from other species of the genus Sula. Among the former are: (1) during ontogenetic development, they change the proportions between the rostrum and the braincase, stretching the first and reducing the height of the second. (2) The skulls have a nasal opening in their early stages of development, which is completely closed with the growth of the bird. The respiratory function moves to a space that is below the pre-orbital fenestra and the jugal, which is protected by ranfoteca. (3) Adult individuals present a trabecular space in the inner part of the upper jaw and frontals that confers resistance to the skull. All these features allow the Sulidae to prevent the rupture or buckling of the skull under the force of the impact of the plunge. In the second case there are: (1) cranial roof slightly vaulted over the orbits; (2) Sagittal crest generally narrow, although wide in some individuals; (3) Short temporal region; (4) Straight proximal rostrum in front of the naso-frontal suture.El presente artículo describe la morfología del cráneo del piquero peruano Sula variegata (Tschudi, 1845), considerando su desarrollo ontogénico, y en comparación con otras especies de la familia Sulidae y, de forma complementaria, con otras familias del tradicional orden Pelecaniformes: Phalacrocoracidae, Anhingidae, Fregatidae, Phaetonthidae y Pelecanidae. En las comparaciones realizadas se pudieron encontrar características que comparte el piquero peruano con los demás miembros de la familia Sulidae, y otras que, en su conjunto, lo diferencian de las demás especies del género Sula. Entre las primeras se tienen: (1) durante el desarrollo ontogénico cambian las proporciones entre el rostrum y la caja craneana, alargándose el primero y reduciéndose la altura del segundo con respecto a este. (2) Los cráneos presentan una abertura nasal en sus estadios iniciales de desarrollo, que se cierra completamente con el crecimiento del ave. La función respiratoria se desplaza hacia un espacio que se encuentra debajo de la fenestra pre-orbitaria y el yugal, que es protegida por la ranfoteca. (3) Los individuos adultos presentan un espacio trabeculado en la parte interna de los frontales y la mandíbula superior, que le confiere resistencia al cráneo. Todas estas características les permiten a los Sulidae evitar la ruptura o pandeo del cráneo ante la fuerza del impacto de la zambullida. En el segundo caso se tienen: (1) techo craneano ligeramente abovedado sobre las órbitas. (2) Cresta sagital por lo general angosta, pero ancha en algunos individuos. (3) Región temporal corta. (4) Porción proximal del rostrum recta, delante de la sutura naso-frontal
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Ramphastosula (Aves, Sulidae): a new genus from the Early Pliocene of the Pisco Formation, Peru
Society of Vertebrate Paleontology, 2010Co-Authors: Stucchi Marcelo, Urbina MarioAbstract:Stucchi, Marcelo y Urbina, Mario. Ramphastosula (Aves, Sulidae): a new genus from the Early Pliocene of the Pisco Formation, Peru. Journal of Vertebrate Paleontology. [en línea]. 2004, 24, 4 pp. 974–978. ISSN 0272-4634.Se describe material craneal de un nuevo género (Ramphastosula) para la familia Sulidae, proveniente del Plioceno temprano de la Formación Pisco (costa centro-sur del Perú). El material se caracteriza por presentar (1) un rostrum marcadamente curvo dorsalmente y recto en su superficie ventral, curvándose so´ lo en la tercera parte anterior y la punta; (2) regiones occipital y temporal muy desarrolladas; (3) procesos opistóticos anchos proyectados más alla del nivel de los procesos postorbitales; (4) fosa temporal ancha, y (5) techo craneano plano y región frontal robusta
D.j. Anderson - One of the best experts on this subject based on the ideXlab platform.
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Phylogeny and Evolution of the Sulidae (Aves: Pelecaniformes): A Test of Alternative Modes of Speciation
Molecular phylogenetics and evolution, 1997Co-Authors: Vicki L. Friesen, D.j. AndersonAbstract:Abstract Although the allopatric model of speciation is widely accepted, it does not provide a satisfactory explanation for many evolutionary phenomena. Several alternative models exist, but they remain largely untested for vertebrate animals. In the present paper, a molecular phylogeny was used to test competing models of speciation in a seabird family, the Sulidae. A segment including 807 base pairs of the mitochondrial cytochrome b gene was sequenced from all extant sulid species, and phylogenetic methods were used to test model-specific predictions regarding tree topologies, distributions of sister taxa, timing of vicariant events, and comparative biology. Both the neighbor-joining and parsimony analyses placed sequences of gannets ( Morus spp.) and boobies of the genus Sula in separate, monophyletic lineages. Sequences of Cape ( M. capensis ) and Australasian ( M. serrator ) gannets clustered together, and the sequence of Abbott's booby ( Papasula abbotti ) was basal to those of the gannets. Sequences of blue-footed ( S. nebouxii ) and Peruvian ( S. variegata ) boobies were sisters and formed a monophyletic group with the masked booby ( S. dactylatra ). The red-footed booby ( S. sula ) sequence was the most divergent of the Sula boobies. All relationships received strong support from standard-error tests and bootstrap analysis. Substitution rates were similar to those suggested for mammals and suggested that most lineages arose within the last 3 million years. Lineage divergence events for which the mode of speciation could be deduced did not fit the predictions of either allopatric or sympatric models, but apparently involved either peripatric or parapatric processes.
