https://www.socictopen.socict.org/files/original/2fbadc1a9138eb53f28c1ad5e64b4efe.pdf d913d2fd8426dfd5c5710f41d5c70e2a 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 Biología de la raya guitarra Rhinobatos leucorhynchus (Günther, 1867) (Rajiformes: Rhinobatidae) en el Pacífico colombiano Biology of the guitar ray Rhinobatos leucorhynchus (Günther, 1867) (Rajiformes: Rhinobatidae) in the Colombian Pacific Creator An entity primarily responsible for making the resource Luis Fernando Payán, Andrés Felipe Navia, Efraín A Rubio, Paola Andrea Mejía-Falla Description An account of the resource La raya guitarra Rhinobatos leucorhynchus es comúnmente capturada como fauna acompañante en la pesca del camarón de aguas someras del Pacífico colombiano, tanto a nivel industrial como artesanal. A partir de 286 ejemplares capturados incidentalmente entre 2001 y 2007, se estudiaron diferentes aspectos biológicos de esta especie. Las hembras fueron proporcionalmente más grandes que los machos, aunque el crecimiento fue similar en ambos sexos (alométrico). Los embriones no presentaron diferencias sexuales significativas ni en talla ni en peso. La proporción sexual en adultos fue 2,4:1 (hembras-machos), mientras que en embriones esta proporción fue de 1:1. El 51,5% de machos presentó claspers desarrollados y calcificados y el 56,5% de las hembras estaban grávidas, presentando fecundidades entre 1 y 6 embriones, con tallas entre 3 y 19,5 cm, sugiriendo una talla de nacimiento entre 19 y 19,5 cm LT. La talla mediana de madurez de las hembras fue menor que la de machos (48,48 cm y 51,18 cm LT, respectivamente), y las hembras presentaron crías a partir de 44 cm LT. Los hábitos alimentarios de esta especie mostraron 30 ítems presa, con camarones de la familia Penaeidae, y especialmente Trachypenaeus sp. como alimento principal. La raya guitarra presentó diferencias significativas en la dieta de machos y hembras, y la amplitud de nicho indicó que es especialista en su dieta. Los resultados de este estudio aportan información útil para plantear medidas de manejo de R. leucorhynchus, especie que requiere atención, dado sus características biológicas y su importancia comercial y de consumo.The guitar ray Rhinobatos leucorhynchus is commonly caught as by-catch of industrial and artisanal shrimp trawling in the shallow waters of the Colombian Pacific. The biological aspects of this species were studied using 286 animals caught as by-catch between 2001 and 2007. The females were proportionally larger than males, although growth was similar (allometric) for both sexes. The embryos showed no significant differences by sex in either size or weight. The adult sex ratio was 2.4:1 (females-males), whereas in embryos this ratio was 1:1. 51.5% of males, 51.5% had developed, calcified claspers, and 56.5% of females were pregnant, carrying between 1 and 6 embryos of 3 to 19.5 cm, suggesting a size at birth of 19 to 19.5 cm TL. The median size at maturity for females was lower than that of males (48.48 cm and 51.18 cm TL, respectively), and the females had embryos starting at 44 cm TL. The feeding habits of this species showed 30 prey items, with shrimp from the Penaeidae family and especially Trachypenaeus sp. as main food. The diets of male and female guitar rays differed significantly, and the niche breadth indicated that this species has a specialist diet. The results of this study provide useful information for proposing management measures for R. leucorhynchus, a species that requires attention given its biological characteristics and its importance in terms of commerce and human consumption. Date A point or period of time associated with an event in the lifecycle of the resource 2011 Subject The topic of the resource Batoideos, Reproducción, Reproduction, batoids, crecimiento, diet, dieta, ecología alimentaria, feeding ecology, growth Source A related resource from which the described resource is derived Latin American Journal of Aquatic Research Publisher An entity responsible for making the resource available Escuela de Ciencias del Mar, Facultad de Recursos Naturales, Pontificia Universidad Católica de Valparaíso Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Biology (General), Oceanography, Aquaculture. Fisheries. Angling Relation A related resource <a href="http://www.scielo.cl/scielo.php?script=sci_arttext&amp;pid=S0718-560X2011000200010" target="_blank" rel="noreferrer noopener">http://www.scielo.cl/scielo.php?script=sci_arttext&amp;pid=S0718-560X2011000200010</a>