Revista De Biologia Marina Y Oceanografia最新文献

{"title":"Interacciones tróficas de Australoheros facetus (Perciformes: Cichlidae), pez exótico en el humedal El Culebrón, Coquimbo, Chile","authors":"J. Avilés, A. López, Héctor Flores","doi":"10.22370/rbmo.2018.53.0.1261","DOIUrl":"https://doi.org/10.22370/rbmo.2018.53.0.1261","url":null,"abstract":"Australoheros facetus se distribuye en los arroyos costeros de Uruguay y Rio Grande do Sul en Brasil, Cuenca del rio Parana y region inferior del rio Parana en Argentina, con una gran capacidad de adaptacion al ambiente. Esta especie es de interes para la acuariofilia y producto de esta actividad se han producido liberaciones en Sudamerica y Europa. En Chile, su introduccion data desde 1940. Esta especie fue detectada habitando en el humedal El Culebron, Coquimbo, Chile y surgen las preguntas de cual sera el impacto de esta especie introducida en las especies nativas, especialmente si su presa es el camaron de rio Cryphiops caementarius . Para obtener informacion de sus habitos alimentarios, junto con un grupo de estudiantes del colegio Guillermo Cereceda Rojas de Coquimbo, se efectuaron 3 muestreos entre el 2015 y 2016. Se capturaron 24 individuos con un 37,5% de hembras, los ejemplares mas pequenos y los de mayor peso fueron machos. A los peces capturados se les registro su longitud total (L t ), peso total (P t ) y sexo. Se determino la proporcion de sexo, distribucion de talla, relacion L t /P t . Se analizo su contenido estomacal, aplicando los indices de frecuencia de ocurrencia, numerica y gravimetrica, determinando el indice de importancia relativa (IIR) y su respectivo porcentaje. Se obtuvo como resultado un crecimiento isometrico y no hubo diferencias en la relacion L t /P t para hembras y machos. Se registro la presencia de 20 item presa (restos de plantas, Annelidae, Mollusca, Arthropoda y Pisces). Las presas mas importantes fueron peces (37,5% IIR), Cryphiops caementarius (25% IIR) y Chironomidaes (13,8% IIR). Se recomienda evaluar la presencia de esta especie, en otros sistemas hidrograficos de la region y en especial, el impacto de A. facetus en la depredacion de camaron de rio.","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":"53 1","pages":"99-105"},"PeriodicalIF":0.4,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44657050","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":"Análisis de la composición de especies en la pesquería de cerco orientada a la captura de anchoveta ( Engraulis ringens ) en la Zona Norte de Chile","authors":"Carola Hernández-Santoro, Benjamín Suárez-Ahumada","doi":"10.4067/s0718-19572018000100051","DOIUrl":"https://doi.org/10.4067/s0718-19572018000100051","url":null,"abstract":"espanolResumen: Se analizo la composicion y proporcion de especies en las capturas de la pesqueria industrial y artesanal que opera con red de cerco de la zona norte de Chile. En este estudio se utilizo informacion biologico-pesquera obtenida a bordo de embarcaciones pesqueras entre los anos 2004 y 2012, a traves del Programa de Seguimiento de Pesqueria Pelagicas de la Zona Norte de Chile. Se analizaron 9.639 lances de pesca. Se determinaron cuatro perfiles se captura que explicaron un 34,27% de la varianza. Los perfiles estuvieron compuestos principalmente por anchoveta Engraulis ringens, jurel Trachurus murphyi y caballa Scomber japonicus, con un alto porcentaje de anchoveta. Solo un perfil presento especies que componen la fauna acompanante. Se examino la influencia del tipo de flota, la variabilidad temporal (ano, mes y trimestre de recalada), el periodo del dia, la posicion geografica, la temperatura superficial del lance, la zona de pesca y la distancia a la costa en la composicion de los perfiles de captura utilizando modelos lineales generalizados. Las variables con mayor influencia estadistica sobre los perfiles de captura fueron el trimestre de recalada, el periodo del dia, la zona, la distancia a la costa y la temperatura. Se observo una baja proporcion de especies no objetivo, influenciadas principalmente por la zona de pesca y el periodo del dia. EnglishAbstract: The composition and species proportion of catch were analyzed in the industrial and artisanal purse seine fishery occurred in the north of Chile. Biological and fishing information obtained on board fishing vessels between 2004 and 2012 through the Monitoring Program of Pelagic Fisheries in North Zone of Chile were used in this study. 9639 fishing hauls were analyzed. Four catch profiles explained the 34.27% of variance. The catch profiles were mainly composed by anchovy Engraulis ringens, jack mackerel Trachurus murphyi and mackerel Scomber japonicus. Anchovy was the dominant species. Only one catch profile grouped non-target species. Using GLM, the influence of type of fleet, temporal variability (year, month and trimester of arrival), day period, geographic position, sea surface temperature, fishing zone and coast distance in the catch profiles composition were analyzed. The trimester of arrival, day period, fishing zone, coast distance and sea surface temperature were the variables with greater statistical influence on catch profiles. A low proportion of non-target species was observed, influenced mainly by the fishing zone and the period of the day.","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":"53 1","pages":"51-60"},"PeriodicalIF":0.4,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44555163","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":"Composición de la comunidad bioincrustante de un cultivo de ostras tropicales en un estuario del Amazonas, Estado de Pará, Norte de Brasil","authors":"Rafael Anaisce das Chagas, Mara Rúbia Ferreira Barros, Wagner Cesar Rosa dos Santos, Marko Herrmann","doi":"10.4067/S0718-19572018000100009","DOIUrl":"https://doi.org/10.4067/S0718-19572018000100009","url":null,"abstract":"espanolResumen: La contaminacion biologica afecta a la acuicultura mundial con importantes impactos de productividad y rentabilidad, especialmente en el cultivo de moluscos, donde tanto la especie de cultivo objetivo como la infraestructura estan expuestas a una diversidad de organismos contaminantes. En el cultivo de ostras, el impacto clave es la adherencia directa de organismos causando dano fisico, interferencia mecanica, competencia biologica y modificacion ambiental, mientras que tambien se efectua la infraestructura. El presente estudio describe la composicion de la bioincrustacion en la superficie de la ostra de mangle Crassostrea rhizophorae, cultivada en un estuario Amazonico, ubicado en el estado de Para, norte de Brasil. En total, 6.124 macroinvertebrados fueron muestreados en julio, agosto, octubre y diciembre de 2013. La epifauna recolectada estuvo representada por 5 grupos principales (Bivalvia, Gastropoda, Polychaeta, Crustacea y Anthozoa), 20 familias y 37 especies. Bivalvia fue la clase mas abundante, presentando 5.183 mejillones de la especie Mytella charruana. El conocimiento sobre la composicion de la incrustacion biologica, asi como la identificacion de las principales especies que causan impactos directos, permite opciones de gestion mas personalizadas y estrategicas, minimizando los costos, a menudo significativos, asociados con el control de la bioincrustacion (antifouling). EnglishAbstract: Biofouling affects global aquaculture with significant impacts on productivity and profitability, especially in marine shellfish culture, where both the target culture species and/or infrastructure are exposed to a diverse array of fouling organisms. In oyster culture, fouling of stock causes physical damage, mechanical interference, biological competition and environmental modification, with infrastructure also colonized. The present study describes the composition of the biofouling community inhabiting the surface of the mangrove oyster Crassostrea rhizophorae, cultivated in an Amazon estuary, in the state of Para, northern Brazil. In total, 6,124 macroinvertebrates were collected during July, August, October and December 2013. Collected epifauna was represented by 5 groups (Bivalvia, Gastropoda, Polychaeta, Crustacea and Anthozoa), 20 families and 37 species. Bivalvia was the most abundant class, with the mussel Mytella charruana by far the most dominant species with 5,183 individuals. Knowledge about the composition of biofouling as well as identifying the main species that cause direct impacts allows more tailored and strategic management options, minimizing the often-significant costs associated with biofouling control (antifouling).","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":"53 1","pages":"9-17"},"PeriodicalIF":0.4,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4067/S0718-19572018000100009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49286956","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":"Prueba de estrés hiperosmótico agudo para evaluar el vigor de larvas a la primera alimentación de la cabrilla arenera Paralabrax maculatofasciatus y del pargo flamenco Lutjanus guttatus","authors":"J. M. Martínez-Brown, Leonardo Ibarra-Castro, Angel Humberto Rojo-Cebreros, Jonathan López-Cabanillas, Mariana Rodríguez-Trejo, J. L. Ortíz-Galindo","doi":"10.4067/S0718-19572018000100087","DOIUrl":"https://doi.org/10.4067/S0718-19572018000100087","url":null,"abstract":"espanolResumen: En este estudio se investigo la tolerancia de larvas a la primera alimentacion de la cabrilla arenera Paralabrax maculatofasciatus y del pargo flamenco Lutjanus guttatus a un estres hiperosmotico agudo. Embriones de P. maculatofasciatus y L. guttatus fueron incubados en microplacas de 48 celdas a 23 y 28°C, respectivamente. Larvas de primera alimentacion fueron expuestas por triplicado a salinidades de 35 a 95 g L-1 o 35 a 85 g L-1, y la supervivencia fue monitoreada de 0,5 a 3,5 h o 0,5 a 53 h, para P. maculatofasciatus y L. guttatus, respectivamente. Los resultados mostraron que la mortalidad aumento de manera diferente entre los tratamientos desde el primer tiempo de exposicion en cada especie. Salinidades extremas fueron letales en 30 min. Salinidades cercanas al control fueron sub-letales. En salinidades intermedias, la mortalidad se ajusto a un modelo potencial o lineal. Para P. maculatofasciatus, los valores de LC50 obtenidos entre 0,5 y 3,5 h fueron de 73,4 a 65,4 g L-1. Para L. guttatus los valores de LC50 obtenidos entre 2 y 5 h fueron de 57,3 a 54,5 g L-1. La comparacion de LC50 entre especies mostro que las larvas de P. maculatofasciatus tuvieron una mayor tolerancia al estres hiperosmotico. Con base en los resultados obtenidos en cada especie, se recomienda la exposicion a 70 g L-1 por 1 h para P. maculatofasciatus y 57 g L-1 por 2 h para L. guttatus, cuando se realicen pruebas de estres hiperosmotico. Esta prueba de estres es objetiva, sencilla y puede utilizarse tanto en estudios sobre nutricion y manejo de reproductores como en plantas de produccion de juveniles como metodo de control de calidad. EnglishAbstract: This study investigated the tolerance of first-feeding larvae of spotted sand bass Paralabrax maculatofasciatus and spotted rose snapper Lutjanus guttatus to acute hyperosmotic stress. P. maculatofasciatus and L. guttatus embryos were incubated in 48-well microplates at 23 and 28°C, respectively. The first-feeding larvae were exposed in triplicate to salinities of 35 to 95 g L-1 or 35 to 85 g L-1, and survival was monitored from 0.5-3.5 h or 0.5-53 h, for P. maculatofasciatus and L. guttatus, respectively. The results showed that mortality increased differently among treatments from the first exposure time in each species. Extreme salinities were lethal in 30 min. Salinities close to the control were sub lethal. At intermediate salinities, mortality was fitted to a potential or linear model. For P. maculatofasciatus, the LC50 values obtained between 0.5 and 3.5 h were 73.4 to 65.4 g L-1. For L. guttatus the LC50 values obtained between 2 and 5 h were 57.3 to 54.5 g L-1. Comparison of LC50 between species showed that P. maculatofasciatus larvae had a higher tolerance to hyperosmotic stress. Based on the results for each species, it is recommended to expose to 70 g L-1 for 1 h for P. maculatofasciatus and 57 g L-1 for 2 h for L. guttatus when conducting hyperosmotic stress tests. This stress test is objectiv","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":"53 1","pages":"87-93"},"PeriodicalIF":0.4,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4067/S0718-19572018000100087","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41863739","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 estacional y nictímera en la distribución del zooplancton dominante en una laguna costera tropical","authors":"Ángeles Mecalco-Hernández, Manuel Castillo-Rivera, Laura Sanvicente-Añorve, C. Flores-coto, C. Álvarez-silva","doi":"10.4067/S0718-19572018000100039","DOIUrl":"https://doi.org/10.4067/S0718-19572018000100039","url":null,"abstract":"espanolResumen: El zooplancton dominante de la laguna La Mancha, Veracruz, Mexico, fue analizado con el objetivo de evaluar su variabilidad estacional y nictimera, asi como la influencia que sobre el ejercen las principales variables ambientales. De mayo 2012 a abril 2013, cada mes se realizo un ciclo de 24 h, tomando muestras cada 4 h, en la boca de la laguna. Simultaneamente a la toma de muestras de zooplancton, se registraron parametros ambientales in situ como la temperatura, oxigeno disuelto, salinidad, clorofila a y numero de celulas fitoplanctonicas. Se capturaron 54 taxa (principalmente del holoplancton) y 10 de ellos fueron considerados dominantes (abundancia total > 0,5%). La comunidad estuvo dominada por dos especies de copepodos (Acartia tonsa y Pseudodiaptomus pelagicus), asi como por larvas zoea de braquiuros (~85%). La abundancia total del zooplancton mostro pulsos significativos a lo largo del ano, uno en febrero-marzo dominado por copepodos y otro en septiembre-octubre, dominado por larvas de decapodos. A pesar de que la abundancia total del zooplancton fue mayor en la noche, solo P. pelagicus, anfipodos, megalopas y otras larvas de decapodo fueron significativas durante este periodo. De acuerdo con un Analisis de Correspondencia Canonica, el estado de la boca (abierta/cerrada), numero de cianofitas y precipitacion fueron los factores ambientales mas importantes en la determinacion de la abundancia del zooplancton dominante. EnglishAbstract: The dominant zooplankton of the La Mancha lagoon, Veracruz, Mexico, was analyzed with the objective of evaluating its seasonal and diel variability, as well as the influence of the main environmental variables on this variability. From May 2012 to April 2013, every month a 24-h cycle was completed, taking samples every 4 h, at the mouth of the lagoon. Simultaneously with zooplankton sampling, in situ environmental parameters such as temperature, dissolved oxygen, salinity, chlorophyll a and number of phytoplankton cells were recorded. We collected 54 taxa (mainly holoplankton) and 10 of them were considered dominant (total abundance > 0.5%). The zooplankton community was dominated mainly by two species of copepods (Acartia tonsa and Pseudodiaptomus pelagicus), as well as zoea larvae of brachyura (~85%). At seasonal level, the total abundance of zooplankton showed significant pulses throughout the year, one in February-March dominated by copepods and another in September-October, dominated by decapod larvae. On a diel scale, although total zooplankton abundance was significantly higher at night, only P. pelagicus, amphipods, megalopae, and other decapod larvae showed significant differences at this level. According to a Canonical Correspondence Analysis, the mouth stage (open/close), the number of cyanophytes and precipitation were the most important environmental factors in determining the abundance of the dominant zooplankton.","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":"53 1","pages":"39-49"},"PeriodicalIF":0.4,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4067/S0718-19572018000100039","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47459273","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":"Explotación intensiva de la tintorera Prionace glauca y del marrajo Isurus oxyrinchus: análisis de la pesquería en el Atlántico noreste entre 2001 y 2016","authors":"S. Biton-Porsmoguer","doi":"10.4067/S0718-19572018000100027","DOIUrl":"https://doi.org/10.4067/S0718-19572018000100027","url":null,"abstract":"espanolResumen: Las tintoreras (Prionace glauca) y los marrajos (Isurus oxyrinchus) son especies objetivo explotadas por los palangreros espanoles y portugueses. Las tripulaciones desembarcan los tiburones en la lonja de Vigo (Espana). La flota palangrera perdio 15 unidades de pesca entre 2004 y 2016. Del 2001 al 2016, las cantidades desembarcadas de marrajos disminuyeron cuando las cantidades de tintoreras subieron notablemente. Segun los informes del ICCAT, el stock de tintorera no esta sobreexplotado. Sin embargo, el stock del marrajo si lo estaria en el Atlantico noreste. Los tiburones capturados y vendidos en la lonja son en la gran mayoria, juveniles, siendo la madurez sexual muy tardia para ambas especies. Las autoridades deben tomar medidas para reducir la presion de la pesca ejercida sobre ambas especies. EnglishAbstract: Blue shark (Prionace glauca) and shortfin mako (Isurus oxyrinchus) are species exploited by the Spanish and Portuguese longline fleet. They land sharks in the fish market at Vigo (Spain). The number of longliners decreased between 2004 and 2016 (less 15 boats). Landings of shortfin mako have decreased and those of blue shark increased between 2001 and 2016. In accordance with ICCAT informs, the blue shark stock is not overexploited. But it is for shortfin mako in the North-eastern Atlantic Ocean. The sharks landed in a fish market are mainly juvenile, the maturity age being late for both species. The authorities must establish measures to reduce fishing pressure.","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":"53 1","pages":"27-38"},"PeriodicalIF":0.4,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45457579","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":"Túnidos tropicales: calentamiento global y seguridad alimentaria, una visión global","authors":"J. C. Báez, P. Pascual-Alayón, M. L. Ramos, F. Abascal","doi":"10.4067/S0718-19572018000100001","DOIUrl":"https://doi.org/10.4067/S0718-19572018000100001","url":null,"abstract":"espanolResumen: El termino ‘tunido tropical’ se refiere a un grupo de especies de peces escombriformes que incluye al listado o barrilete (Katsuwonus pelamis), el patudo (Thunnus obesus) y el rabil (Thunnus albacares), que presentan una amplia distribucion pantropical, y cuyo optimo de temperatura superficial del agua del mar en el que habitan se situa en torno a los 20oC. Actualmente, dos de estas especies se encuentran entre las 7 especies con mayores volumenes de desembarque a nivel mundial. Se preve que en el futuro los stocks de tunidos tropicales jueguen un papel fundamental para salvaguardar la seguridad alimentaria. El objetivo de este trabajo fue presentar los principales retos de la biologia pesquera en relacion a la gestion de las poblaciones de tunidos tropicales en un contexto de cambio climatico. Para esto se revisaron los estudios que se han abordado hasta el presente sobre el efecto tanto de las oscilaciones climaticas, como del calentamiento global en las poblaciones de tunidos tropicales. EnglishAbstract: The term ‘tropical tuna’ refers to skipjack (Katsuwonus pelamis), bigeye (Thunnus obesus) and yellowfin tunas (Thunnus albacares), which have a wide pantropical distribution. Tropical tunas inhabit waters with a sea surface temperature with an optimal value around 20°C. Currently, two of these species are among the 7 species with higher landings worldwide. In addition, it is expected that future tropical tuna stocks play a key role safeguarding food security. The aim of this paper was to review the studies about the effect of both climatic oscillations and global warming on tropical tuna populations. Moreover, it warns about the main challenges of fisheries biology in relation to the management of stocks of tropical tunas, an important fishery resource, in the context of climate change. For this, a review of studies that have addressed to date the effect of both climate oscillations and global warming on populations of tropical tunas was performed.","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":"53 1","pages":"1-8"},"PeriodicalIF":0.4,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4067/S0718-19572018000100001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49207451","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":"Registros limnéticos de Hypanus sabinus (Myliobatiformes: Dasyatidae) en la cuenca del río Grijalva, sur del Golfo de México","authors":"Henrry Reyes-Ramírez, Nicolás Álvarez-Pliego, Alberto J. Sánchez, Héctor Espinosa-Pérez, R. Florido, M. A. Salcedo","doi":"10.4067/S0718-19572018000100141","DOIUrl":"https://doi.org/10.4067/S0718-19572018000100141","url":null,"abstract":"Abstract: Hypanus sabinus is reported in the limnetic environments in the coastal plain of the Southern Gulf of Mexico. Eight specimens were collected 51 km away from the coastline in electric conductivity values less than 1,017 µS cm-1. One pregnant female and one male with two caudal spines are included. These findings represent the first limnetic records of this species in southern Mexico.","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":"53 1","pages":"141-146"},"PeriodicalIF":0.4,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47216759","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":"Variaciones estacionales de la comunidad de quitones (Mollusca: Polyplacophora) en una zona intermareal rocosa del sur del Golfo de México","authors":"Laura Sanvicente-Añorve, Rodrigo Rodríguez-Vázquez, Elia Lemus-Santana, Miguel Alatorre-Mendieta, Martha Reguero","doi":"10.4067/S0718-19572018000100019","DOIUrl":"https://doi.org/10.4067/S0718-19572018000100019","url":null,"abstract":"espanolResumen: La costa sur del Golfo de Mexico es tipicamente una llanura costera que alterna con salientes rocosas. Este estudio tuvo como objetivo comparar la estructura comunitaria de los quitones del litoral rocoso de Montepio, durante los periodos meteorologicos de secas y nortes y proporcionar datos sobre el crecimiento relativo de las especies dominantes. Se muestreo sobre un transecto de 100 x 2 m en la zona intermareal y se recolectaron 83 individuos. Se identificaron 6 especies: Lepidochitona rosea, Chaetopleura apiculata, Ischnochiton kaasi, Lepidochitona pseudoliozonis, Lepidochitona liozonis y Acanthochitona andersoni. Las 2 epocas fueron muy similares en riqueza de especies (S= 4) y diversidad de Shannon (1,36 y 1,29 bits ind-1 en secas y nortes); sin embargo, solo 2 especies ocurrieron en ambos periodos, lo que indica un fuerte recambio estacional de especies (50%). Esta dinamica estacional se deberia a la discontinuidad del sustrato rocoso, que no permitiria una recuperacion rapida de las poblaciones despues del impacto de los nortes. La densidad de organismos fue baja ( EnglishAbstract: The southern Gulf of Mexico is typically a coastal plain where rocky shores are scattered distributed. The goal of this study was to compare the chiton community structure of the rocky shore of Montepio during the dry and ‘nortes’ (stormy) weather periods, and to gather data on the relative growth of the dominant species. Sampling was carried out along a transect of 100 x 2 m in the intertidal zone and 83 individuals were collected. Six species were identified: Lepidochitona rosea, Chaetopleura apiculata, Ischnochiton kaasi, Lepidochitona pseudoliozonis, Lepidochitona liozonis and Acanthochitona andersoni. Species richness (S= 4) and Shannon diversity (1.36 and 1.29 bits ind-1 in dry and stormy seasons) were very similar between the 2 seasons; however, only 2 species occurred in both periods, suggesting a strong seasonal exchange of species (50%). This seasonal dynamics could be due to the discontinuity of the rocky substrate, which would not allow a rapid recovery of the populations after the impact of storms. Density of individuals was low (","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":"53 1","pages":"19-26"},"PeriodicalIF":0.4,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48563698","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":"53 1","pages":"131-140"},"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}