Pub Date : 2021-01-09DOI: 10.22370/RBMO.2020.55.3.2583
Á. Mendoza-González, L. E. Mateo-Cid, M. R. Ortega-Murillo, Leslie Zurita-Valencia, Juan Diego Sánchez-Heredia, Cynthia Mariana Hernández-Casas
Se realizo una investigacion bibliografica y de herbario de Phaeophyceae citada para el litoral de Michoacan, Mexico. Se anadieron datos obtenidos de muestreos realizados en 11 localidades de 2006 a 2014, con el objetivo de contribuir al conocimiento de las Phaeophyceae de la region. Se determinaron 52 taxones (49 especies y 3 variedades), 27 son nuevos registros para Michoacan, se citan por primera vez: Streblonema anomalum y Ectocarpus taoniae para la costa del Pacifico de Mexico. El numero mas alto de taxones se registro en La Majahuita (27) y el mas bajo en San Telmo (2). Las familias mejor representadas fueron Dictyotaceae (15 taxones) seguidas por Chordariaceae y Ectocarpaceae (5 cada una). De 25 especies registradas en la bibliografia, se corroboro la presencia de 12. Con los nuevos registros el numero de feoficeas se incremento a 52 taxones. La lista floristica se acompana con datos de presencia, estacionalidad, estado fenologico, habitat y referencias bibliograficas. Se comparo la riqueza especifica entre las estaciones climaticas de lluvias y de secas durante el periodo de estudio, encontrandose el numero mas alto de taxones en la epoca de secas. El litoral de Michoacan tiene la riqueza especifica mas alta de Phaeophyceae, al compararse con Nayarit, Colima, Jalisco, Guerrero, Oaxaca y Chiapas.
{"title":"Nuevos registros y lista actualizada de las algas pardas (Phaeophyceae) del litoral de Michoacán, México","authors":"Á. Mendoza-González, L. E. Mateo-Cid, M. R. Ortega-Murillo, Leslie Zurita-Valencia, Juan Diego Sánchez-Heredia, Cynthia Mariana Hernández-Casas","doi":"10.22370/RBMO.2020.55.3.2583","DOIUrl":"https://doi.org/10.22370/RBMO.2020.55.3.2583","url":null,"abstract":"Se realizo una investigacion bibliografica y de herbario de Phaeophyceae citada para el litoral de Michoacan, Mexico. Se anadieron datos obtenidos de muestreos realizados en 11 localidades de 2006 a 2014, con el objetivo de contribuir al conocimiento de las Phaeophyceae de la region. Se determinaron 52 taxones (49 especies y 3 variedades), 27 son nuevos registros para Michoacan, se citan por primera vez: Streblonema anomalum y Ectocarpus taoniae para la costa del Pacifico de Mexico. El numero mas alto de taxones se registro en La Majahuita (27) y el mas bajo en San Telmo (2). Las familias mejor representadas fueron Dictyotaceae (15 taxones) seguidas por Chordariaceae y Ectocarpaceae (5 cada una). De 25 especies registradas en la bibliografia, se corroboro la presencia de 12. Con los nuevos registros el numero de feoficeas se incremento a 52 taxones. La lista floristica se acompana con datos de presencia, estacionalidad, estado fenologico, habitat y referencias bibliograficas. Se comparo la riqueza especifica entre las estaciones climaticas de lluvias y de secas durante el periodo de estudio, encontrandose el numero mas alto de taxones en la epoca de secas. El litoral de Michoacan tiene la riqueza especifica mas alta de Phaeophyceae, al compararse con Nayarit, Colima, Jalisco, Guerrero, Oaxaca y Chiapas.","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42410099","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}
Pub Date : 2020-12-16DOI: 10.22370/rbmo.2020.55.2.2499
S. Sáez, R. Jaramillo
Se estudio la morfologia de las escamas situadas en ambas lineas laterales de D. eleginoides y fueron comparadas con las escamas corporales obtenidas de 12 sectores diferentes a lo largo de los ejes antero-posterior y dorso-ventral del tronco. Las escamas de ambas lineas son del tipo cicloideas y ovaladas; estan constituidas por una placa de la escama, un tubo central con una abertura anterior (ausente en algunas escamas del sector medio del tronco) y otra posterior. El analisis morfologico no mostro diferencias entre las escamas de ambas lineas; sin embargo, las escamas corporales se diferencian de las escamas de la linea lateral por la ausencia del tubo central. La mayoria de las escamas del sector anterior del cuerpo son cicloideas y solo algunas son del tipo ctenoideas; mientras que en la zona media y posterior es caracteristica la presencia de ambos tipos de escamas en el lado derecho e izquierdo del cuerpo. Los resultados obtenidos entregan nuevos antecedentes morfologicos basicos tanto para las escamas presentes en ambas lineas laterales como las corporales. Es recomendable en el caso de las escamas de las lineas laterales continuar con estudios histologicos para determinar la conexion nerviosa entre ambas y obtener asi una vision mas completa del sistema mecanosensorial de D. eleginoides .
{"title":"Estudio comparativo de escamas de las líneas laterales y corporales del Bacalao de profundidad Dissostichus eleginoides (Teleostei: Nototheniidae)","authors":"S. Sáez, R. Jaramillo","doi":"10.22370/rbmo.2020.55.2.2499","DOIUrl":"https://doi.org/10.22370/rbmo.2020.55.2.2499","url":null,"abstract":"Se estudio la morfologia de las escamas situadas en ambas lineas laterales de D. eleginoides y fueron comparadas con las escamas corporales obtenidas de 12 sectores diferentes a lo largo de los ejes antero-posterior y dorso-ventral del tronco. Las escamas de ambas lineas son del tipo cicloideas y ovaladas; estan constituidas por una placa de la escama, un tubo central con una abertura anterior (ausente en algunas escamas del sector medio del tronco) y otra posterior. El analisis morfologico no mostro diferencias entre las escamas de ambas lineas; sin embargo, las escamas corporales se diferencian de las escamas de la linea lateral por la ausencia del tubo central. La mayoria de las escamas del sector anterior del cuerpo son cicloideas y solo algunas son del tipo ctenoideas; mientras que en la zona media y posterior es caracteristica la presencia de ambos tipos de escamas en el lado derecho e izquierdo del cuerpo. Los resultados obtenidos entregan nuevos antecedentes morfologicos basicos tanto para las escamas presentes en ambas lineas laterales como las corporales. Es recomendable en el caso de las escamas de las lineas laterales continuar con estudios histologicos para determinar la conexion nerviosa entre ambas y obtener asi una vision mas completa del sistema mecanosensorial de D. eleginoides .","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48447657","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}
Pub Date : 2020-12-16DOI: 10.22370/rbmo.2020.55.2.2494
Gabriel Aguirre-Guzman, Edgar Alberto López Acevedo
La presencia de especies invasoras es un tema que esta adquiriendo gran importancia debido al efecto en el medio ambiente que pueden generar. El objetivo del presente trabajo fue colectar informacion cientifica sobre una nueva especie invasora ( Penaeus monodon ) reportada en las costas mexicanas (2012), mostrando su posible origen, mecanismos de dispersion en las costas del Atlantico Americano y el riesgo potencial para el ecosistema. La informacion cientifica historica sobre P. monodon en el Atlantico Americano senala que fue trasladado a Brasil y EUA en 1987-1988 con fines de cultivo, donde ademas se reportaron fugas de esta especie. Desde 1987 al 2016 se han detectado adultos silvestres de P. monodon en Brasil, Colombia, Costa Rica, Cuba, EUA, Guatemala, Mexico, y Venezuela, lo que sugiere el establecimiento de esta especie en las aguas del Atlantico Americano. La evidencia tambien senala que P. monodon es un importante competidor de espacio y alimento de especies locales de camaron, posible depredador de otros crustaceos y reservorio / vehiculo de diferentes agentes patogenos (virus, bacterias y parasitos). Es importante profundizar en las investigaciones sobre la dinamica poblacional que presenta esta especie en aguas del Atlantico Americano, sus mecanismos de distribucion, consecuencias potenciales que puede generar su crecimiento poblacional sobre la biota nativa, ademas de su importancia como reservorio natural de agentes patogenos virales que afecten la produccion de camaron silvestre y de cultivo.
{"title":"Presencia del camarón tigre gigante Penaeus monodon (Decapoda: Penaeidae) en las costas del Atlántico Americano. Revisión","authors":"Gabriel Aguirre-Guzman, Edgar Alberto López Acevedo","doi":"10.22370/rbmo.2020.55.2.2494","DOIUrl":"https://doi.org/10.22370/rbmo.2020.55.2.2494","url":null,"abstract":"La presencia de especies invasoras es un tema que esta adquiriendo gran importancia debido al efecto en el medio ambiente que pueden generar. El objetivo del presente trabajo fue colectar informacion cientifica sobre una nueva especie invasora ( Penaeus monodon ) reportada en las costas mexicanas (2012), mostrando su posible origen, mecanismos de dispersion en las costas del Atlantico Americano y el riesgo potencial para el ecosistema. La informacion cientifica historica sobre P. monodon en el Atlantico Americano senala que fue trasladado a Brasil y EUA en 1987-1988 con fines de cultivo, donde ademas se reportaron fugas de esta especie. Desde 1987 al 2016 se han detectado adultos silvestres de P. monodon en Brasil, Colombia, Costa Rica, Cuba, EUA, Guatemala, Mexico, y Venezuela, lo que sugiere el establecimiento de esta especie en las aguas del Atlantico Americano. La evidencia tambien senala que P. monodon es un importante competidor de espacio y alimento de especies locales de camaron, posible depredador de otros crustaceos y reservorio / vehiculo de diferentes agentes patogenos (virus, bacterias y parasitos). Es importante profundizar en las investigaciones sobre la dinamica poblacional que presenta esta especie en aguas del Atlantico Americano, sus mecanismos de distribucion, consecuencias potenciales que puede generar su crecimiento poblacional sobre la biota nativa, ademas de su importancia como reservorio natural de agentes patogenos virales que afecten la produccion de camaron silvestre y de cultivo.","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45429169","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}
Pub Date : 2020-12-16DOI: 10.22370/rbmo.2020.55.2.2498
Angelica Nunes Garcia, Erika Mattos Stein, Leonardo Zambotti Villela, N. Yokoya, P. Colepicolo Neto, Luciana Retz de Carvalho
Macroalgae are considered bioindicators for marine pollution, because they have the ability to quickly react to changes in their environment. In consequence, macroalgae populations fluctuate, according to species characteristics and adaptive strategies. Their cell wall polysaccharides contain sulfate groups that are capable of retaining and accumulating heavy metals. In addition to traditional contaminants, emerging pollutants are being recognized in aquatic environments. Herein, emerging pollutants have been identified after being desorbed from the macroalga Dichotomaria marginata, collected from Fortaleza Beach, Ubatuba, Brazil. Based on that algal polysaccharide networks have the potential of forming hydrogen bonds with polar compounds, it was hypothesized that these pollutants would be bound to sugar polymers. Compounds present in the D. marginata samples were identified using both gas and liquid chromatography/mass spectrometry (GC/MS and HPLC/MS), assisted by computational methods. It was possible to unequivocally identify 22 emerging contaminants with GC/MS, and 16 substances with HPLC/MS.
{"title":"Dichotomaria marginata (Rhodophyta) as a bioindicator for marine pollution: An overview about its metabolites and adsorbed pollutants","authors":"Angelica Nunes Garcia, Erika Mattos Stein, Leonardo Zambotti Villela, N. Yokoya, P. Colepicolo Neto, Luciana Retz de Carvalho","doi":"10.22370/rbmo.2020.55.2.2498","DOIUrl":"https://doi.org/10.22370/rbmo.2020.55.2.2498","url":null,"abstract":"Macroalgae are considered bioindicators for marine pollution, because they have the ability to quickly react to changes in their environment. In consequence, macroalgae populations fluctuate, according to species characteristics and adaptive strategies. Their cell wall polysaccharides contain sulfate groups that are capable of retaining and accumulating heavy metals. In addition to traditional contaminants, emerging pollutants are being recognized in aquatic environments. Herein, emerging pollutants have been identified after being desorbed from the macroalga Dichotomaria marginata, collected from Fortaleza Beach, Ubatuba, Brazil. Based on that algal polysaccharide networks have the potential of forming hydrogen bonds with polar compounds, it was hypothesized that these pollutants would be bound to sugar polymers. Compounds present in the D. marginata samples were identified using both gas and liquid chromatography/mass spectrometry (GC/MS and HPLC/MS), assisted by computational methods. It was possible to unequivocally identify 22 emerging contaminants with GC/MS, and 16 substances with HPLC/MS.","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68307782","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}
Pub Date : 2020-08-14DOI: 10.22370/rbmo.2020.55.1.2353
Pilar Aparicio-Rizzo, I. Masotti, M. Landaeta
In this work 10 years of data (1986-1996) from a fixed station located in the northern part of Valparaiso Bay (33o00’S; 71o35’W) were analysed to study the influence of coastal upwelling activity on the temporal variation of micro-phytoplankton (20-200 μm) and their relationship with oceanographic conditions. The upwelling activity at the bay was associated to semi-annual wind regime with an intensification of upwelling-favourable S-SW winds from September to March followed by a decrease and the occurrence of downwelling events from April to August. Oceanographic conditions showed the ascent of cold, nutrient-rich salty water in spring (September-November). However, during summertime under highest upwelling index, thermal stratification conditions were registered. This stratification might be associated to either the solar radiation or the presence of an upwelling shadow area in the bay. The upwelling period had the highest micro-phytoplankton abundance mainly dominated by diatoms. This period was associated with an increase in biomass and richness in the bay. Meanwhile during non-upwelling period —under homogenous conditions of temperature, salinity and nutrients— an increase in diversity (but low abundance and richness) associated to dinoflagellates and silicoflagellates was noted. Therefore, the results suggest the presence of a bi-modal regime of micro-phytoplankton in the bay in response to changes in oceanographic conditions related to local wind forcing and mixing/stratification.
{"title":"Influence of coastal upwelling on micro-phytoplankton variability at Valparaíso Bay (~33ºS), Central Chile","authors":"Pilar Aparicio-Rizzo, I. Masotti, M. Landaeta","doi":"10.22370/rbmo.2020.55.1.2353","DOIUrl":"https://doi.org/10.22370/rbmo.2020.55.1.2353","url":null,"abstract":"In this work 10 years of data (1986-1996) from a fixed station located in the northern part of Valparaiso Bay (33o00’S; 71o35’W) were analysed to study the influence of coastal upwelling activity on the temporal variation of micro-phytoplankton (20-200 μm) and their relationship with oceanographic conditions. The upwelling activity at the bay was associated to semi-annual wind regime with an intensification of upwelling-favourable S-SW winds from September to March followed by a decrease and the occurrence of downwelling events from April to August. Oceanographic conditions showed the ascent of cold, nutrient-rich salty water in spring (September-November). However, during summertime under highest upwelling index, thermal stratification conditions were registered. This stratification might be associated to either the solar radiation or the presence of an upwelling shadow area in the bay. The upwelling period had the highest micro-phytoplankton abundance mainly dominated by diatoms. This period was associated with an increase in biomass and richness in the bay. Meanwhile during non-upwelling period —under homogenous conditions of temperature, salinity and nutrients— an increase in diversity (but low abundance and richness) associated to dinoflagellates and silicoflagellates was noted. Therefore, the results suggest the presence of a bi-modal regime of micro-phytoplankton in the bay in response to changes in oceanographic conditions related to local wind forcing and mixing/stratification.","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41844306","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}
The bacterioplankton in the upwelling systems associated with oceanographic condition of the oxygen minimum zone (OMZ) of the Eastern tropical South Pacific was studied through visualization and enumeration with fluorescent in situ hybridization (FISH). Six different taxonomic groups were studied ( Alpha, Beta, Gamma-proteobacteria, Cytophaga-flavobacterium and the domains Archaea and Bacteria ). The analysis showed a greater predominance of the Bacteria domain (20 to 68% of hybridized cells) over Archaea (2 to 18% of hybridized cells). The specific groups showed that Cytophaga-flavobacterium , Alpha-proteobacteria and Gamma-proteobacteria are more abundant in the surface layer. Gamma-proteobacteria is also most abundant in the deep oxycline and, Beta-proteobacteria is the group with the lowest registered abundances. Changes in the vertical distribution of the bacterial community in the water column between OMZ and on oxycline were observed through NMDS. This change is a product of a shift in the abundances of the specific groups Cytophaga-flavobacterium and Gamma-proteobacteria in the surface layers, due to low concentration of chlorophyll- a caused by periods of relaxation in the upwelling.
{"title":"Temporal and vertical variability of bacterioplankton composition in Chipana bay (21º20’S) in a coastal upwelling system of northern Chile: A fluorescence in situ hybridization approach","authors":"Cristy Medina-Armijo, Rubén Moraga-Mamani, Edgardo Santander-Pulgar","doi":"10.22370/rbmo.2020.55.1.2375","DOIUrl":"https://doi.org/10.22370/rbmo.2020.55.1.2375","url":null,"abstract":"The bacterioplankton in the upwelling systems associated with oceanographic condition of the oxygen minimum zone (OMZ) of the Eastern tropical South Pacific was studied through visualization and enumeration with fluorescent in situ hybridization (FISH). Six different taxonomic groups were studied ( Alpha, Beta, Gamma-proteobacteria, Cytophaga-flavobacterium and the domains Archaea and Bacteria ). The analysis showed a greater predominance of the Bacteria domain (20 to 68% of hybridized cells) over Archaea (2 to 18% of hybridized cells). The specific groups showed that Cytophaga-flavobacterium , Alpha-proteobacteria and Gamma-proteobacteria are more abundant in the surface layer. Gamma-proteobacteria is also most abundant in the deep oxycline and, Beta-proteobacteria is the group with the lowest registered abundances. Changes in the vertical distribution of the bacterial community in the water column between OMZ and on oxycline were observed through NMDS. This change is a product of a shift in the abundances of the specific groups Cytophaga-flavobacterium and Gamma-proteobacteria in the surface layers, due to low concentration of chlorophyll- a caused by periods of relaxation in the upwelling.","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48234030","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}
Pub Date : 2020-08-14DOI: 10.22370/rbmo.2020.55.1.2394
Ángel I. Campa-Cordova, Yenni-Morales Cristóbal, M. A. Guzmán-Murillo, Gabriel Aguirre-Guzman
Shrimp diets with mixtures of probiotics (bacilli or yeasts) were evaluated on the production response and immunological effect on juvenile shrimp (Litopenaeus vannamei). The results showed a significant effect in growth, food consumption and feed conversion rate when probiotic diet was used. In addition, experimental diets with yeast mixture [C. insectorum (DH5), D. hansenii (DH6, and L1)] had a significantly higher amount of circulating haemocytes than those with bacilli [B. tequilensis (YC5-2), B. endophyticus (YC3-b) and B. endophyticus (C2-2)]. Shrimp fed both experimental diets (3x107 CFU mL-1) had a significantly higher growth and immune parameters when compared with the commercial diet. Both elements can contribute to the sustainable development and health of shrimp farming.
{"title":"Evaluación de la respuesta productiva e inmune en juveniles de camarón Litopenaeus vannamei alimentado con mezclas probióticas","authors":"Ángel I. Campa-Cordova, Yenni-Morales Cristóbal, M. A. Guzmán-Murillo, Gabriel Aguirre-Guzman","doi":"10.22370/rbmo.2020.55.1.2394","DOIUrl":"https://doi.org/10.22370/rbmo.2020.55.1.2394","url":null,"abstract":"Shrimp diets with mixtures of probiotics (bacilli or yeasts) were evaluated on the production response and immunological effect on juvenile shrimp (Litopenaeus vannamei). The results showed a significant effect in growth, food consumption and feed conversion rate when probiotic diet was used. In addition, experimental diets with yeast mixture [C. insectorum (DH5), D. hansenii (DH6, and L1)] had a significantly higher amount of circulating haemocytes than those with bacilli [B. tequilensis (YC5-2), B. endophyticus (YC3-b) and B. endophyticus (C2-2)]. Shrimp fed both experimental diets (3x107 CFU mL-1) had a significantly higher growth and immune parameters when compared with the commercial diet. Both elements can contribute to the sustainable development and health of shrimp farming.","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46941590","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}
Pub Date : 2020-08-14DOI: 10.22370/rbmo.2020.55.1.2354
Gabriel Pérez-Lara, Andrés Meynard, P. Alvear, Cristian Bulboa-Contador, L. Contreras-Porcia
Mariculture of edible Porphyra/Pyropia species, which are cosmopolitan red foliose algae, represent an important source of income for the pharmaceutical and food industries. In Chile, the most common alga of this complex is Pyropia orbicularis (Bangiales, Rhodophyta). Here we report 6 microsatellite markers obtained from P. orbicularis through a genomic library from 10 individuals of the gametophytic phase by next generation (Illumina) sequencing. Polymorphism analyses were done from 10 individuals of the conchocelis phase, revealing an allelic diversity ranging from three to six alleles per locus, and observed heterozygosity (HO) and expected heterozygosity (HE) ranging from 0.200 to 0.995, and 0.250 to 0.610, respectively. A large proportion of genetic variance (61%) in P. orbicularis was among individuals within population, and 39% genetic variance was among populations. Nonetheless, these results should be interpreted with caution; further research using larger sample sizes is required. These polymorphic markers could be useful in future studies on population genetic structure, for conservation and applied purposes.
{"title":"Development of six novel microsatellite markers for the Chilean red alga Pyropia orbicularis","authors":"Gabriel Pérez-Lara, Andrés Meynard, P. Alvear, Cristian Bulboa-Contador, L. Contreras-Porcia","doi":"10.22370/rbmo.2020.55.1.2354","DOIUrl":"https://doi.org/10.22370/rbmo.2020.55.1.2354","url":null,"abstract":"Mariculture of edible Porphyra/Pyropia species, which are cosmopolitan red foliose algae, represent an important source of income for the pharmaceutical and food industries. In Chile, the most common alga of this complex is Pyropia orbicularis (Bangiales, Rhodophyta). Here we report 6 microsatellite markers obtained from P. orbicularis through a genomic library from 10 individuals of the gametophytic phase by next generation (Illumina) sequencing. Polymorphism analyses were done from 10 individuals of the conchocelis phase, revealing an allelic diversity ranging from three to six alleles per locus, and observed heterozygosity (HO) and expected heterozygosity (HE) ranging from 0.200 to 0.995, and 0.250 to 0.610, respectively. A large proportion of genetic variance (61%) in P. orbicularis was among individuals within population, and 39% genetic variance was among populations. Nonetheless, these results should be interpreted with caution; further research using larger sample sizes is required. These polymorphic markers could be useful in future studies on population genetic structure, for conservation and applied purposes.","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41907399","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}
Pub Date : 2020-08-14DOI: 10.22370/rbmo.2020.55.1.2356
Javier Paredes-Mella, D. Varela
Alexandrium catenella is the main species that form harmful algae blooms (HABs) in southern Chile. Since its first record in 1972 in the Magallanes region this species apparently has increased its range distribution from south to north. In this study, we investigate the influence of the range expansions distribution on the A. catenella populations genetic diversity and structure. This was achieved by isolating 33 clones from different localities along the Magallanes and Aysen region which were genetically characterized with Amplified Fragment Length Polymorphism (AFLPs) molecular markers. Results showed a latitudinal genetic diversity gradient from the south to north populations. Inter-populations genetic divergences were low but significant between both geographically close and distant populations. Results indicated that the genetic diversity differentiation could be generated by a founder effect, which is expected in populations that have expanded their distribution range. On the other hand, low levels of genetic divergences between distant populations seems point out that high gene flow occurs along coast of the Pacific Ocean, but also, seems hints the connectivity route between the Magallanes and Aysen populations i.e. , the vegetative cells dispersion among populations, would occur through coastal Pacific coast and Boca del Guafo. Finally, the high values of multilocus linkage disequilibrium found between closer population of Aysen indicates that divergence could be influenced along with the reproductive dynamic of the vegetative cells.
{"title":"Genetic population structure of the toxigenic dinoflagellate Alexandrium catenella in the Patagonian Fjords System, southern Chile","authors":"Javier Paredes-Mella, D. Varela","doi":"10.22370/rbmo.2020.55.1.2356","DOIUrl":"https://doi.org/10.22370/rbmo.2020.55.1.2356","url":null,"abstract":"Alexandrium catenella is the main species that form harmful algae blooms (HABs) in southern Chile. Since its first record in 1972 in the Magallanes region this species apparently has increased its range distribution from south to north. In this study, we investigate the influence of the range expansions distribution on the A. catenella populations genetic diversity and structure. This was achieved by isolating 33 clones from different localities along the Magallanes and Aysen region which were genetically characterized with Amplified Fragment Length Polymorphism (AFLPs) molecular markers. Results showed a latitudinal genetic diversity gradient from the south to north populations. Inter-populations genetic divergences were low but significant between both geographically close and distant populations. Results indicated that the genetic diversity differentiation could be generated by a founder effect, which is expected in populations that have expanded their distribution range. On the other hand, low levels of genetic divergences between distant populations seems point out that high gene flow occurs along coast of the Pacific Ocean, but also, seems hints the connectivity route between the Magallanes and Aysen populations i.e. , the vegetative cells dispersion among populations, would occur through coastal Pacific coast and Boca del Guafo. Finally, the high values of multilocus linkage disequilibrium found between closer population of Aysen indicates that divergence could be influenced along with the reproductive dynamic of the vegetative cells.","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41632759","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}
Pub Date : 2020-08-14DOI: 10.22370/rbmo.2020.55.1.2395
J. Catalán, Catalina Merino-Yunnissi, Andrea Martínez, Javie Sellanes, Christian M. Ibáñez
The presence of Solanometra antarctica has been reported in the continental slope of central Chile, however, some studies suggest that this species could have been confused with Florometra magellanica . In this study, 11 crinoid specimens obtained in the continental slope of Central Chile were analyzed and compared with other specimens previously collected in that same region and catalogued as Florometra magellanica . The morphological and meristic characteristics confirm that the crinoids collected in Central Chile, off Concepcion and Los Vilos, correspond to Florometra magellanica .
{"title":"Nuevos registros de crinoideos (Echinodermata: Crinoidea) en el talud continental de Chile","authors":"J. Catalán, Catalina Merino-Yunnissi, Andrea Martínez, Javie Sellanes, Christian M. Ibáñez","doi":"10.22370/rbmo.2020.55.1.2395","DOIUrl":"https://doi.org/10.22370/rbmo.2020.55.1.2395","url":null,"abstract":"The presence of Solanometra antarctica has been reported in the continental slope of central Chile, however, some studies suggest that this species could have been confused with Florometra magellanica . In this study, 11 crinoid specimens obtained in the continental slope of Central Chile were analyzed and compared with other specimens previously collected in that same region and catalogued as Florometra magellanica . The morphological and meristic characteristics confirm that the crinoids collected in Central Chile, off Concepcion and Los Vilos, correspond to Florometra magellanica .","PeriodicalId":54475,"journal":{"name":"Revista De Biologia Marina Y Oceanografia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45438352","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}
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