https://socictopen.socict.org/files/original/203d2c7befea46795c48320e118bd44a.pdf 9e3f8ec5c4d7fb48f9d94209eb5289cf Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Agricultura sostenible Description An account of the resource Dominio científico: Agricultura sostenible Text A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Ecología trófica de los ostreros Haematopus palliatus pitanay (Murphy 1925) y Haematopus ater (Vieillot et Oudart 1825) en mantos del tunicado Pyura praeputialis (Heller 1878) en la Bahía de Antofagasta, Chile Trophic ecology of the oystercatchers Haematopus palliatus pitanay (Murphy 1925) and Haematopus ater (Vieillot et Oudart 1825) on beds of the tunicate Pyura praeputialis (Heller 1878) in the Bay of Antofagasta, Chile Creator An entity primarily responsible for making the resource JUAN C. CASTILLA, CRISTIAN J. PACHECO Description An account of the resource En Antofagasta, norte de Chile, coexisten dos especies de ostreros: Haematopus palliatus pitanay (ostrero blanco) y Haematopus ater (ostrero negro). Ambas especies depredan en un sistema rocoso intermareal peculiar cuya franja media se encuentra dominada por el tunicado Pyura praeputialis (= Pyura stolonifera bradleyi; Kott 1997). En la literatura se discute sobre las diferencias morfológicas del pico (largo y ancho) entre ambos tipos de ostreros. Dichas diferencias podrían segregar los roles de forrajeo de estas aves cuando comparten un mismo hábitat: los ostreros blancos atacarían preferentemente a presas de textura 'blanda' y los ostreros negros atacarían presas de textura 'dura' (i.e. cobertura calcárea). En este trabajo se consideró a P. praeputialis (piure de Antofagasta) como una presa de textura 'blanda', ya que su tunica, compuesta por tunicina, es suave y flexible. En el estudio se comparan diversos aspectos ecológicos entre ambas especies de ostrero tales como: (a) abundancia de ostreros y de otras aves costeras que depredan sobre P. praeputialis, (b) distribución espacial de los ostreros en el manto de piure durante sus actividades de depredación, (c) tallas de piures preferidos, (d) tiempos de manipulación, (e) tasa de consumo y (f) frecuencia de consumo de otros invertebrados distintos del piure. Los resultados señalan a H. palliatus pitanay como la especie de ostrero que ataca con mayor frecuencia a P. praeputialis. Por otra parte, H. ater ataca con mayor frecuencia presas de textura 'dura' como: lapas, caracoles, choritos, erizosAt Antofagasta, northern Chile, two oystercatcher species coexist: the white oystercatcher, Haematopus palliatus pitanay and the black oystercatcher H. ater. Both species forage on an intertidal system where the middle fringe is dominated by the tunicate Pyura praeputialis (= Pyura stolonifera bradleyi; Kott 1997). According to the literature, differences in the morphology of their bills (length and width) segregate the foraging roles of white and black oystercatchers when the birds coexist in the same habitat. H. palliatus pitanay is best adapted for capturing soft bodied preys, while black oystercatcher H. ater attack 'hard' preys (i.e. preys with calcareous shells). We consider here that the tunicate P. praeputialis as a soft bodied prey because the tunic, composed of tunicine, is soft and pliable. We compare ecological aspects between the two oystercatchers species in Antofagasta, such as: (a) abundance of oystercatchers and other coastal birds preying on P. praeputialis, (b) the spatial distribution of the oystercatchers in the Pyura bed during foraging periods, (c) Pyura size preferences of oystercatchers, (d) handling time, (e) consumption rate and (f) preference of other invertebrates prey items distinct from Pyura. The results show that H. palliatus pitanay attacks more frequently Pyura than H. ater, and that H. ater attacks more frequently 'hard' preys such as: limpets, snails, mussels and sea urchins. Date A point or period of time associated with an event in the lifecycle of the resource 2000 Subject The topic of the resource Chile, Haematopus, Pyura, Trophic ecology, ecología trófica, intermareal rocoso, ostreros, oystercatchers, rocky intertidal, tunicados, tunicate Source A related resource from which the described resource is derived Revista Chilena de Historia Natural Publisher An entity responsible for making the resource available BMC Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Botany, Zoology Relation A related resource <a href="http://www.scielo.cl/scielo.php?script=sci_arttext&amp;pid=S0716-078X2000000300017" target="_blank" rel="noreferrer noopener">http://www.scielo.cl/scielo.php?script=sci_arttext&amp;pid=S0716-078X2000000300017</a>