Revista De Biologia Marina Y Oceanografia最新文献

{"title":"Variación espacio-temporal en la composición del ensamble de macroalgas del intermareal rocoso de Maitencillo, Valparaíso, costa central de Chile","authors":"Claudia Betancourtt, Javier Zapata, Nicolás Latorre, Cristóbal Anguita, F. Castañeda, Andrés Meynard, Camila Fierro, Camila Espinoza, E. Guajardo, A. Núñez, Nicolás Salas, C. González, M. E. Ramírez, Cristian Bulboa-Contador, Loretto Contreras-Porcia","doi":"10.4067/S0718-19572018000100105","DOIUrl":"https://doi.org/10.4067/S0718-19572018000100105","url":null,"abstract":"espanolResumen: El registro de la diversidad de algas permite reconocer especies que podrian generar informacion base para medidas de manejo, proteccion de los ambientes y presentar nuevas oportunidades de uso. En este contexto, el objetivo del presente trabajo fue determinar la riqueza, cobertura y composicion del ensamble de especies de macroalgas en la zona intermareal de Maitencillo, Valparaiso, Chile, durante 3 anos de monitoreo (2013-2015). Un total de 29 especies fueron registradas, donde 23 de ellas pertenecen a Rhodophyta, 3 a Ochrophyta; clase Phaeophyceae, y 3 a Chlorophyta. La riqueza de especies presento una alta variacion espacio-temporal en el area de estudio, donde las zonas del intermareal y las estaciones del ano presentaron un efecto significativo, explicando un 61 y 31% de su variabilidad, respectivamente. La mayor riqueza especifica se registro en las zonas media y baja (14 especies) durante primavera, y en la zona baja del intermareal (14) durante verano. Los menores valores fueron encontrados en la zona media (2) durante otono. Las zonas del intermareal demostraron ser la variable de mayor importancia a nivel de la comparacion del ensamble de algas, explicando el 53% de la variacion, mientras que la estacionalidad explico el 18% de esta. La mayor cobertura fue registrada en la zona media durante primavera, con predominio de Mazzaella laminarioides y Ulva spp. En la estacion de otono se obtuvo la menor cobertura debido a los procesos de acrecion de arena. En paredones dominaron especies del complejo Pyropia. Los resultados indicaron un claro patron de distribucion vertical y variacion estacional en el ensamble de macroalgas, destacando una mayor presencia de especies de Rhodophyta. La descripcion de la flora bentonica obtenida en este trabajo actualiza la diversidad de algas representativa de la Region de Valparaiso, Chile. EnglishAbstract: Records on the diversity of algae serve as a foundation for establishing management and environmental protection programs, as well as for determining new commercial uses of algae. With this context in mind, the goal of the present study was to determine the richness, coverage, and composition of the macroalgae assemblage in the intertidal zone of Maitencillo, Valparaiso, Chile over the course of 3 years (2013-2015). A total of 29 species were recorded from three phyla - 23 Rhodophyta; 3 Ochrophyta, of the Phaeophyceae class; and 3 Chlorophyta. Species richness presented high spatial and temporal variations, with these variations most significantly explained by intertidal zone (61%) and the seasons (31%). The highest levels of specific richness were recorded in the mid and lower intertidal zones (14 species) in spring, as well as in the lower intertidal zone (14 species) during summer. The lowest values of specific richness were recorded for the mid intertidal zone (2 species) during fall. The distinct levels of the intertidal zone also notably impacted algae assemblage, explaining 53% of ","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4067/S0718-19572018000100105","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47807872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Amplificación del gen rbc L revela primer registro de Porphyra mumfordii (Bangiales, Rhodophyta) en la bahía de Valparaíso, Chile central","authors":"Pilar Muñoz-Muga, Héctor Romo, Carlos Calderón, O. Evrard, H. Díaz","doi":"10.4067/S0718-19572018000100131","DOIUrl":"https://doi.org/10.4067/S0718-19572018000100131","url":null,"abstract":"The genus Porphyra , commonly found along Chilean coast, is an important commercial algal food known as nori. There are some specimens of Porphyra found at Montemar Marine Protected Area (32°57’S; 71°33’W) in Valparaiso Bay, which taxonomical identity is not clear. This study aimed to identify long-bladed specimens of Porphyra inhabiting the upper, mid and lower intertidal in Valparaiso Bay. To do so, 30 thalli of Porphyra were collected during the winter of 2015 in Montemar. All samples were subjected to rbc L molecular marker amplification. However, only 18 individuals were sequenced successfully. In addition, a morphological description was conducted. The rbc L analysis showed that the longbladed specimens inhabiting Valparaiso Bay correspond to Porphyra mumfordii . Differences in size and color of thalli found on each intertidal level were recorded. This research constitutes the first record of P. mumfordii for central Chile.","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4067/S0718-19572018000100131","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44174905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Indicadores de sustentabilidad para la pesquería de curvina golfina Cynoscion othonopterus en el Alto Golfo de California","authors":"J. E. Mendívil-Mendoza, E. A. Aragón-Noriega, J. A. Arreola-Lizárraga, G. Rodríguez-Domínguez, Sergio G. Castillo-Vargasmachuca, Gilberto G Ortega-Lizárraga","doi":"10.4067/S0718-19572018000100119","DOIUrl":"https://doi.org/10.4067/S0718-19572018000100119","url":null,"abstract":"espanolResumen: El Alto Golfo de California y Delta del Rio Colorado es un area que se encuentra inmersa en un conflicto ecologico, economico, politico y social debido a la pesca ilegal de totoaba Totoaba macdonaldi y la posible extincion de vaquita marina Phocoena sinus. Esto ultimo ha provocado el cierre de todas las pesquerias en la region salvo la de curvina golfina Cynoscion othonopterus la cual es la unica especie con permiso de explotacion. Por lo tanto, el objetivo principal fue evaluar el estado de salud de la pesqueria mediante los indicadores de sustentabilidad de Froese en el Alto Golfo de California durante las temporadas de pesca 2008, 2013, 2014 y 2015. Los resultados mostraron que la produccion anual de curvina golfina presenta fluctuaciones, resaltando el periodo 2012-2016, donde las capturas totales con excepcion de 2014, sobrepasaron la cuota de captura establecida por el Instituto Nacional de la Pesca. La longitud de madurez para los anos estudiados fueron: 2008= L50: 502 mm (IC= 490-514 mm), 2013= L50: 559 mm (IC= 544-576 mm), 2014= L50: 499 mm (IC= 476-518 mm), y 2015= L50: 480 mm (IC= 445-510 mm). Con base en los indicadores de sustentabilidad, se demuestra que la pesqueria de curvina golfina esta dirigida hacia los organismos de mayor longitud (mega-reproductores). Se concluye que actualmente la curvina golfina manifiesta problemas de sobreexplotacion y por ende su aprovechamiento no es sustentable. Esto sugiere la necesidad realizar ajustes y actualizaciones a las actuales medidas de manejo. EnglishAbstract: The Upper Gulf of California and Colorado River Delta is a zone which is immersed in an ecological, economic, political and social conflict. That is because of the Totoaba Totoaba macdonaldi illegal fishing and the Vaquita Phocoena sinus potential extinction. This issue has driven to ban all the region's fisheries with the exception of the Gulf corvina Cynoscion othonopterus which is the only of the finfish species with operating license. Therefore, the main objetive was to evaluate the fishery's health condition through the Froese sustainability indicators in Upper Gulf of California during 2008, 2013, 2014 and 2015 fishing seasons. The results showed that the Gulf corvina annual production ratio showed fluctuations, highlighting in the 2012-2016 period, when the whole fishing captures with the exception of 2014, surpassed the established quota by the National Institute of Fishery (Instituto Nacional de Pesca). The size-at-maturity were: 2008= L50: 502 mm (IC= 490-514 mm), 2013= L50: 559 mm (IC= 544-576 mm), 2014= L50: 499 mm (IC= 476-518 mm), and 2015= L50: 480 mm (IC= 445-510 mm). Based on the sustainability indicators, it is demonstrated that the Gulf corvina fishery is directed towards the organisms of greater length (mega-spawners). Finally it is concluded that Gulf corvina currently shows problems of over-exploitation and therefore its exploitation is not sustainable. This suggests the need to make adjustments ","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4067/S0718-19572018000100119","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48464441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reproductive biology of king weakfish, Macrodon ancylodon (Perciformes, Sciaenidae) from the northeastern coast of Brazil","authors":"Alana dos Santos Cardoso, Nayara Santos, Z. Almeida, R. N. F. C. Neta, Lorrane Gabrielle Cantanhêde","doi":"10.4067/S0718-19572018000100095","DOIUrl":"https://doi.org/10.4067/S0718-19572018000100095","url":null,"abstract":"The reproductive biology of Macrodon ancylodon , a commercially important fish widely distributed along South America’s Atlantic coast, is described from 240 specimens collected in northeastern Brazil. Specimens ranged from 18.2 to 33.5 cm in length, exhibiting positive allometry. Total length at first sexual maturity was 21.13 cm. M. ancylodon has an asynchronous gonadal maturation and would be a batch spawner within a reproductive period. Total weight and length of females do not affect the relative fecundity values in this species. Analysis of the gonadosomatic index, condition factor and frequency of maturational stages shows that M. ancylodon was capable of reproducing throughout the year, despite the fact that spawning peaks were observed during November-December and August-September. The results are evidence that the study area is used by M. ancylodon for reproduction. The data will also be important for the development of stock management strategies.","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4067/S0718-19572018000100095","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48035254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Crecimiento y capacidad de biorremediación de Chlorella vulgaris (Trebouxiophycea, Chlorophyta) cultivada en aguas residuales generadas en el cultivo del pez dorado Seriola lalandi (Perciformes: Carangidae)","authors":"Roberto Ramos, Roberto Pizarro","doi":"10.4067/S0718-19572018000100075","DOIUrl":"https://doi.org/10.4067/S0718-19572018000100075","url":null,"abstract":"Growth of microalgae Chlorella vulgaris and its efficiency in dissolved nutrients removal from effluent generated by yellowtail amberjack hatchery production were studied under laboratory scale conditions. This research evaluated indoor and outdoor conditions during 8 days, using filtered and UV light disinfected effluent, inoculated with an initial concentration of 2.06·10 6 ± 4.16·10 3 cells mL -1 of Chlorella vulgaris . In the determination of the growth and removal of nutrients, 12 transparent cylindrical-conical ponds with a capacity of 50 L were used. Three ponds were used for each experimental condition, indoor (3) and outdoor (3), with effluent water from the dorado culture, the remaining six ponds were controls using 1μm filtered seawater, disinfected and enriched with general culture medium F/2, in indoor (3) and outdoor (3), respectively. The result of growth under indoor condition reached a maximum value of 4.17·10 6 ± 7.57·10 5 cells mL -1 after 6 days. Similar growth was achieved in control tanks 4.75·10 6 ±  2.29·10 5 cells mL -1 , whereas in outdoor experimental condition the maximum growth obtained was 2.81·10 6 ± 2.69·10 5 cells mL -1 reached on day 2, compared with controls that showed a maximum growth of 1.83·10 7 ± 2.29·10 5 cells mL -1 . The best nutrient removal results recorded as nitrite removal were values of 91.67 and 88.41% (indoor and outdoor conditions, respectively). Nitrate removed reach a 57.47% (indoor) and 29.31% (outdoor) and a similar ammonia removal of 42.22% for both experimental conditions. Finally, high phosphate removal of 65.78% (indoor) and 75.78% (outdoor) were observed. The results show that the use of the microalga Chlorella vulgaris for the absorption of nutrients and growth in wastewater is feasible, which opens up encouraging perspectives for its application in purification processes in the fish farming activity or another industry that generates effluents with these characteristics.","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2018-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4067/S0718-19572018000100075","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44514233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Distribución, densidad, proporción sexual y fecundidad de Belzebub faxoni (Decapoda, Luciferidae) en el Sistema Arrecifal Veracruzano, SO del Golfo de México","authors":"S. Cházaro-Olvera, M. Ortiz, I. Winfield, Jesús Alfonso Pérez-Ramos, César Meiners-Mandujano","doi":"10.4067/S0718-19572017000300005","DOIUrl":"https://doi.org/10.4067/S0718-19572017000300005","url":null,"abstract":"espanolSe analizo la distribucion, densidad, biomasa, proporcion sexual y fecundidad de B. faxoni en el Parque Nacional Sistema Arrecifal Veracruzano (PNSAV), suroeste del Golfo de Mexico. La recoleccion de las muestras biologicas se realizo en junio, agosto y octubre 2011; enero, marzo y mayo 2012 y enero, marzo y junio 2013. Para la recolecta se efectuaron arrastres en el nivel superficial del agua desde una lancha con motor fuera de borda, utilizando una red conica de 330 µm de abertura de malla. Se midio la salinidad, temperatura y oxigeno. Se contabilizo el numero total de camarones y se estandarizo a 100 m-3. Se midio la talla y la biomasa. Se conto el numero de huevos de cada hembra gravida. Se analizo la distribucion y densidad. Los valores de los parametros durante los 3 anos de muestreo oscilaron entre 21,95 ± 0,11 a 29,29 ± 0,19 °C de temperatura, 33,91 ± 0,10 a 35,90 ± 0,14 de salinidad y 2,45 ± 0,23 a 5,63 ± 0,61 mg l-1 de oxigeno. La mayor densidad se presento en marzo 2013 con 6.391 camarones 100 m-³. De manera general la mayor densidad se presento en los transectos B y D (centro y sur del PNSAV). Marzo 2013 presento la mayor biomasa con 5.283 mg 100 m-³. Las hembras con longitud total de 12,28 ± 0,59 mm presentaron una fecundidad de 7,1 ± 3,43 huevos. EnglishThe distribution, density, biomass, sex ratio and fecundity of Belzebub faxoni in the Veracruz Reef System National Park, southwest of the Gulf of Mexico, were analysed. The collection of biological samples was conducted on a motorboat with outboard motor in June, August and October 2011; January, March and May 2012; and January, March and June 2013, using a conical net of 330 µm. Salinity, temperature and oxygen were measured. The total number of shrimps were counted and standardized at 100 m-3. The biomass and height were measured. The number of eggs of each gravid female was counted. The distribution and density was analysed. The average temperature was 21.95 ± 0.11 to 29.29 ± 0.19°C, salinity of 33.91 ± 0.10 to 35.90 ± 0.14, oxygen 2.45 ± 0.23 in the northern zone and 5.63 ± 0.61 mg l-1 in the south. The highest density was presented in March 2013, with 6,391 shrimp/100 m-³. Generally, the highest density was presented in transects B and D (centre and south). March 2013 had the highest biomass with 5,283 mg 100 m-³. Females with a total length of 12.28 ± 0.59 mm had a fertility rate of 7.1 ± 3.43 eggs.","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43245709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A bloom of Azadinium polongum in coastal waters off Peru","authors":"U. Tillmann, Sonia Sánchez-Ramírez, B. Krock, Avy Bernales-Jiménez","doi":"10.4067/S0718-19572017000300015","DOIUrl":"https://doi.org/10.4067/S0718-19572017000300015","url":null,"abstract":"espanolLas especies dinoficeas del genero Azadinium son conocidas por la produccion potencial de azaspiracidos (AZAs), un grupo de toxinas microalgales que pueden causar intoxicacion a traves de mariscos. El incremento de registros globales de Azadinium indican una distribucion bastante amplia de este genero, sin embargo los datos cuantitativos de abundancia de las especies de familia Amfidomataceae son dificiles de encontrar. Como parte del programa de monitoreo bio-oceanografico en aguas costeras peruanas frente a Chancay, se detecto y muestreo en febrero de 2014 una floracion densa de Azadinium, con una temperatura de agua de mar alrededor de 20,5 °C y una salinidad de 35. Este es el primer reporte de una floracion de Azadinium en el oceano Pacifico con densidades celulares de hasta un millon de celulas por litro causante de una decoloracion del agua de mar. Usando microscopia electronica de barrido, se determino como taxon responsable a Azadinium polongum. Esta especie previamente habia sido detectada solo en las Islas Shetland (Atlantico norte), localidad tipo y descrita como no productora de AZA. La poblacion observada en campo se ajusto al cultivo tipo Shetland en la mayoria de los aspectos morfologicos. Sin embargo, a diferencia de este tipo de cultivo de Az. polongum, la primera placa intercalar de la poblacion observada en el Pacifico, en ningun caso, estuvo en contacto con la primera placa precingular. Mas aun, el tamano y la forma de la segunda placa intercalar fue ligeramente diferente y muy variable en la poblacion del Pacifico, ocurriendo en casi igual abundancia en configuracion cuadra (es decir, en contacto con cuatro placas) o configuracion penta (en contacto con cinco placas), un rasgo no reportado para el cultivo tipo de Az. polongum. La cromatografia liquida acoplada con espectrometria de masa no detecto AZA por encima del nivel de deteccion en la muestra de la floracion, indicando que la especie peruana de Az. polongum puede considerarse como no productora de AZA. EnglishSpecies of the dinophycean genus Azadinium are known for their potential production of azaspiracids (AZAs), a group of microalgal toxins that can cause shellfish poisoning. Increase of global Azadinium records indicates a rather wide distribution, but quantitative abundance data of species of Amphidomataceae are hardly available. Within the Peruvian bio-oceanographic monitoring program we detected and sampled a dense bloom of Azadinium in Peruvian coastal waters off Chancay in February 2014 at a water temperature of about 20.5 °C and a salinity of 35. With water discoloration and cell densities of Azadinium up to 1 million cells per liter this is the first Azadinium bloom record for the Pacific. The causative taxon was determined using scanning electron microscopy as Azadinium polongum, a species previously recorded only from the type locality, the Shetland Islands (north Atlantic) and described as non-AZA producer. The field population conformed to the Shet","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42544737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Variación interanual en la dieta invernal del flamenco chileno Phoenicopterus chilensis (Aves: Phoenicopteriformes) en el humedal marino de Bahía Caulín, Chiloé, sur de Chile","authors":"Claudio N. Tobar, J. Rau, Alexis F. Santibañez, N. Fuentes, Jaime A. Cursach, Jonnathan Vilugrón, A. Magro, Jorge Pérez-Schultheiss","doi":"10.4067/S0718-19572017000300009","DOIUrl":"https://doi.org/10.4067/S0718-19572017000300009","url":null,"abstract":"espanolEl flamenco chileno (Phoenicopterus chilensis) es un ave acuatica endemica de America del Sur. En Chile habita tanto en lagunas altiplanicas como en humedales marinos. Sin embargo, los estudios dietarios en ambientes marinos son escasos. En este trabajo se caracterizo la variacion interanual en la dieta invernal del flamenco en el humedal marino de Bahia Caulin, sur de Chile. Para ello, se determino el tamano de las presas entre junio a septiembre del 2011, 2014 y 2015. Se analizo un total de 157 heces (77 heces en 2011 y 80 heces entre 2014 y 2015). La dieta del flamenco chileno durante el 2011 fue carnivora y estuvo conformada solo por tres presas: el foraminifero Ammonia beccarii, el copepodo Harpacticus sp. y poliquetos. Durante 2014-2015 su dieta fue omnivora, incluyendo la presencia de 15 categorias de presas, entre las que destaco el consumo de algas y fibras vegetales. En lo que respecta a los tamanos de las presas consumidas por el flamenco, el diametro de los foraminiferos oscilo entre los 100 y 900 µm con predominio de organismos entre los 400 y 600 µm. El ancho de Harpacticus sp. consumidos oscilo entre los 160 y 260 µm con predominio para los organismos entre los 200 y 220 µm. El ancho de Parawaldeckia kidderi consumidos oscilo entre los 140 y 800 µm con predominio para los organismos entre los 140 y 400 µm. El ancho de Monocorophium insidiosum consumidos oscilo entre los 80 y 500 µm con predominio para los organismos entre los 80 y 400 µm. El flamenco chileno seria un depredador parcialmente selectivo cuya seleccion de presas estaria dada por las restricciones morfoestructurales del pico de esta ave. EnglishThe Chilean flamingo (Phoenicopterus chilensis) is an endemic aquatic bird of South America. In Chile, it is found in both highland lagoons as well as in marine wetlands. Nevertheless, dietary studies in marine environments are scarce. This work characterized the interannual variation in the winter diet of flamingos found in the marine wetland of Bahia Caulin, southern Chile. To this end, we determined the size of prey items consumed between June and September of the 2011, 2014 and 2015. A total of 157 feces were analyzed (77 feces in 2011 and 80 feces between 2014 and 2015). The diet of Chilean flamingo during 2011 was carnivorous and was formed by only three preys, the foraminifera Ammonia beccarii, the copepod Harpacticus sp. as well as polychaetes. During 2014-2015 its diet was omnivorous, and consisted of 15 categories of prey items, among which the consumption of algae and plant fibers was stressed. Regarding the sizes of prey consumed by flamingo, the diameter of the foraminifera oscillated between 100 and 900 µm with predominance of organisms between 400 and 600 µm. The width of Harpacticus sp. consumed ranged from 160 to 260 µm with a predominance of organisms between 200 and 220 µm. The width of consumed Parawaldeckia kidderi ranged between 140 and 800 µm with predominance for organisms between 140 and 400 µm. Th","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4067/S0718-19572017000300009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48613680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pilot-scale production of the rotifer Brachionus sp. under different culture systems","authors":"A. H. Rojo-Cebreros, L. Ibarra-Castro, Ernesto Guerrero-Carlock, J. L. Sánchez-Téllez, L. Álvarez-Lajonchère","doi":"10.4067/S0718-19572017000300011","DOIUrl":"https://doi.org/10.4067/S0718-19572017000300011","url":null,"abstract":"espanolPequenos Brachionus sp. (130-230 µm) en 2011-2012 y superpequenos Brachionus sp. (110-140 µm) en 2013-2014, se cultivaron en un sistema por lotes (ciclos de 3 o 4 dias) y en sistemas semi-continuos. Para la alimentacion de rotiferos se usaron microalga concentrada (Nannochloropsis sp.), dosificada continuamente con una bomba peristaltica. Las condiciones del cultivo fueron provistas con aire, oxigeno e hidroximetanosulfonato de sodio. La produccion total promedio por dia fue 552, 602 y 459 millones de rotiferos d-1, con una densidad final promedio de cosecha de 1.099 rotiferos mL-1, 1.052 rotiferos mL-1 y 1.015 rotiferos mL-1, para tres dias (3-d), cuatro dias (4-d) del sistema de produccion por lotes y el sistema de produccion semi-continuo, respectivamente. Los valores promedios producidos de rotiferos fueron adecuados para suplir los requerimientos de rotiferos en los ciclos de cultivos piloto, para producir 169 x 10³/ano (2012) a 564 x 10³ (2013) juveniles/ano con una demanda media anual de 83,9 x 10(6) rotiferos/1000 juveniles producidos. Los costos totales operacionales por millon de rotiferos/dia fueron bajos con el sistema de cultivo semi-continuo ($0,23), seguido por el sistema por lotes de 4-d ($0,55) y el sistema por lotes de 3-d ($0,59). Estos costos de produccion fueron mas bajos que otros reportes de produccion con alimento artificial y sistemas de recirculacion. Los principales componentes de los costos operacionales fueron alimento (71-77%) y personal (7-11%). La mejor estabilidad y confiabilidad de la produccion fue con el sistema semi-continuo, el cual garantizo las cantidades requeridas diariamente para los cultivos de cria larval mas altos. Para posibles mejoras y aumento de la produccion, la discusion se basa en terminos de eficiencia financiera. EnglishSmall Brachionus sp. (130-230 µm) in 2011-2012 and tiny Brachionus sp. (110-140 µm) in 2013-2014 were reared in batch culture (3 or 4 day cycles) and semi-continuous systems. For feeding rotifers, nonviable microalgae (Nannochloropsis sp.) were used and were continuously dosed with peristaltic pumps. The cultures provided air, oxygen, and sodium hydroxymethanesulfonate. An average total daily production of 552, 602 and 459 million rotifers d-1 with mean final densities of 1,099 rotifers mL-1, 1,052 rotifers mL-1 and 1,015 rotifers mL-1 were harvested in three day (3-d) and four day (4-d) batch culture systems and semi-continuous culture systems, respectively. The average values of rotifers produced were adequate to supply the rotifers required in the parallel pilot rearing larval cycles, and 169 x 10³/yr (2012) to 564 x 10³ (2013) juveniles/yr were produced with a mean annual demand of 83.9 x 10(6) rotifers/1,000 juveniles produced. The total operational cost per million rotifers/day was lower for the semi-continuous culture system ($0.23), followed by the 4-d batch system ($0.55) and 3-d batch system ($0.59). These production costs were lower than those of other report","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4067/S0718-19572017000300011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48572725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Screening for WSSV in crustacean from marine areas of Buenos Aires, Argentina","authors":"S. Martorelli, P. Marcotegui, M. Montes, C. J. Panei","doi":"10.4067/s0718-19572017000300020","DOIUrl":"https://doi.org/10.4067/s0718-19572017000300020","url":null,"abstract":"In total 374 specimens corresponding to four species of shrimp: Artemesia longinaris, Pleoticus muelleri, Peisos petrunkevitchii, Palaemon macrodactylus, and two species of crabs: Neohelice granulata and Cyrtograpsus angulatus were studied in the search of white spot syndrome virus (WSSV). The crustaceans were collected in the estuary of Bahia Blanca, the port of Mar del Plata and the Samborombon Bay, Argentina, between 2010 and 2014. A polymerase chain reaction (PCR) analysis in all of them has not detected any virus presence. These new results suggest that the discovery of infected shrimp in 2008-09 in the Bahia Blanca estuary may have been a one-time local event, promoted by special conditions of seawater temperature inside the estuary, coincident with the presence of a virus carrier or transporter. To determine if the virus was finally installed in the estuary of Bahia Blanca more screening are needed coming from a larger number of shrimp samples. These studies will be necessary mainly in A. longinaris (Penaeidae) since this family of shrimps is most susceptible to be affected by WSSV.","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4067/s0718-19572017000300020","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45114319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}