Pub Date : 2020-12-16DOI: 10.22370/rbmo.2020.55.2.2502
G. De-la-Torre, Diego Marcelo Apaza-Vargas, Luis Luis Santillán
Microplastics (< 5 mm) are ubiquitous contaminants in the marine environment. The aims of the present study were to report the incidence of microplastic pollution in three mollusk species from the coast of Lima and to investigate the relationship between microplastic ingestion and feeding ecology. Specimens of three mollusk species Semimytilus algosus, Tegula atra and Chiton granosus were sampled from the intertidal rocky zone. For microplastic isolation, soft tissues were digested in 10% KOH, vacuum filtrated and analyzed under a microscope. Rigorous contamination prevention measures were taken into account. C. granosus was the most contaminated mollusk (6.92 ± 2.13 particles g-1). Red fibers were the overall most abundant microplastic. The feeding behavior of T. atra promotes microplastic exposure to C. granosus. More research is needed to fully understand the microplastic effects on mollusk species.
{"title":"Microplastic ingestion and feeding ecology in three intertidal mollusk species from Lima, Peru","authors":"G. De-la-Torre, Diego Marcelo Apaza-Vargas, Luis Luis Santillán","doi":"10.22370/rbmo.2020.55.2.2502","DOIUrl":"https://doi.org/10.22370/rbmo.2020.55.2.2502","url":null,"abstract":"Microplastics (< 5 mm) are ubiquitous contaminants in the marine environment. The aims of the present study were to report the incidence of microplastic pollution in three mollusk species from the coast of Lima and to investigate the relationship between microplastic ingestion and feeding ecology. Specimens of three mollusk species Semimytilus algosus, Tegula atra and Chiton granosus were sampled from the intertidal rocky zone. For microplastic isolation, soft tissues were digested in 10% KOH, vacuum filtrated and analyzed under a microscope. Rigorous contamination prevention measures were taken into account. C. granosus was the most contaminated mollusk (6.92 ± 2.13 particles g-1). Red fibers were the overall most abundant microplastic. The feeding behavior of T. atra promotes microplastic exposure to C. granosus. More research is needed to fully understand the microplastic effects on mollusk species.","PeriodicalId":347046,"journal":{"name":"Revista de Biología Marina y Oceanografía","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131922439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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.2020.55.2.2503
Imelda Gómez-Hernández, Arturo Serrano, Cecilia Becerril-Gómez, A. Basáñez-Muñoz, C. Naval-Ávila
Xenobalanus globicipitis is a commensal barnacle located on cetacean fin edges. The commensal-host interaction between Xenobalanus globicipitis and the bottlenose dolphin (Tursiops truncatus) has been poorly studied in Mexico. The main objective was to estimate the relative barnacle prevalence and abundance in bottlenose dolphins in three areas and seasons of the Gulf of Mexico. Tamiahua zone showed the higher prevalence (42.4%) and relative abundance (0.60 barnacles/individual/hr-1)compared to Tuxpan and Nautla zones. Whereas, in dry season there were higher prevalence (55.6%) and relative abundance (0.53 barnacles/individual/hr-1)than rainy and winter storm seasons. Therefore, zones and seasons of the Gulf of Mexico influence the barnacle-dolphin interactions.
{"title":"Prevalencia y abundancia relativa de balanos Xenobalanus globicipitis presentes en poblaciones de delfín nariz de botella Tursiops truncatus en el Golfo de México Sur","authors":"Imelda Gómez-Hernández, Arturo Serrano, Cecilia Becerril-Gómez, A. Basáñez-Muñoz, C. Naval-Ávila","doi":"10.22370/rbmo.2020.55.2.2503","DOIUrl":"https://doi.org/10.22370/rbmo.2020.55.2.2503","url":null,"abstract":"Xenobalanus globicipitis is a commensal barnacle located on cetacean fin edges. The commensal-host interaction between Xenobalanus globicipitis and the bottlenose dolphin (Tursiops truncatus) has been poorly studied in Mexico. The main objective was to estimate the relative barnacle prevalence and abundance in bottlenose dolphins in three areas and seasons of the Gulf of Mexico. Tamiahua zone showed the higher prevalence (42.4%) and relative abundance (0.60 barnacles/individual/hr-1)compared to Tuxpan and Nautla zones. Whereas, in dry season there were higher prevalence (55.6%) and relative abundance (0.53 barnacles/individual/hr-1)than rainy and winter storm seasons. Therefore, zones and seasons of the Gulf of Mexico influence the barnacle-dolphin interactions.","PeriodicalId":347046,"journal":{"name":"Revista de Biología Marina y Oceanografía","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127870647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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.2020.55.1.2396
Claudio Guajardo-Barbosa, L. Galán-Wong, Julio César Beltrán-Rocha, I. Quintero-Zapata, F. L. Gandarilla-Pacheco, B. Pereyra-Alférez, M. Santos, H. Luna-Olvera
Recent research has shown that the use of biological extracts, which contain a wide variety of nutrients and phytohormones are potentially useful in the production of plants of agricultural importance. Seaweed extracts are particularly rich in minerals and micronutrients necessary for the growth of microalgae. The effect of three commercial extracts of Ascophyllum nodosum as plant growth inducers (Stimplex®, Acadian Soils® and Liquid Seaweed Concentrate®), provided by Acadian Sea Plants Ltd., were evaluated in relation to the growth and production of biomass and carotenoids in Haematococcus pluvialis. The results were evaluated by one-way ANOVA and post-hoc analysis utilizing Tukey's test with a significance level of 95% (α= 0.05). The reference medium used was the Bold basal medium, to which 250 ppm of each extract was added. The Stimplex® extract had an increase of 22.79% in cell density and 17% in dry matter, higher than the control culture. The content of carotenoids and antioxidant capacity, respectively, with Stimplex® was 30.05% and 141.76% higher than the control culture.
{"title":"Effect of Ascophyllum nodosum extracts on the growth, yield and antioxidant capacity of Haematococcus pluvialis carotenoids","authors":"Claudio Guajardo-Barbosa, L. Galán-Wong, Julio César Beltrán-Rocha, I. Quintero-Zapata, F. L. Gandarilla-Pacheco, B. Pereyra-Alférez, M. Santos, H. Luna-Olvera","doi":"10.22370/rbmo.2020.55.1.2396","DOIUrl":"https://doi.org/10.22370/rbmo.2020.55.1.2396","url":null,"abstract":"Recent research has shown that the use of biological extracts, which contain a wide variety of nutrients and phytohormones are potentially useful in the production of plants of agricultural importance. Seaweed extracts are particularly rich in minerals and micronutrients necessary for the growth of microalgae. The effect of three commercial extracts of Ascophyllum nodosum as plant growth inducers (Stimplex®, Acadian Soils® and Liquid Seaweed Concentrate®), provided by Acadian Sea Plants Ltd., were evaluated in relation to the growth and production of biomass and carotenoids in Haematococcus pluvialis. The results were evaluated by one-way ANOVA and post-hoc analysis utilizing Tukey's test with a significance level of 95% (α= 0.05). The reference medium used was the Bold basal medium, to which 250 ppm of each extract was added. The Stimplex® extract had an increase of 22.79% in cell density and 17% in dry matter, higher than the control culture. The content of carotenoids and antioxidant capacity, respectively, with Stimplex® was 30.05% and 141.76% higher than the control culture.","PeriodicalId":347046,"journal":{"name":"Revista de Biología Marina y Oceanografía","volume":"22 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132915053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-17DOI: 10.22370/rbmo.2019.54.3.2020
Roberto Ramos, A. Navarro
A escala de laboratorio se evaluó la eficiencia de remoción de material particulado y nutrientes disueltos contenidos en el efluente generado en la producción del pez Seriola lalandi. Fueron aplicados procesos de sedimentación, filtración por la ostra Crassostrea gigas y absorción por la macroalga Gracilaria chilensis en tiempos de retención hidráulica (TRH) de 6, 12 y 24 h. Se utilizaron tanques cilindro cónico de 150 L de capacidad para el proceso de sedimentación. En los procesos de filtración y absorción se emplearon tanque cilindro cónico de acrílico con 50 L de capacidad. Todos los tratamientos fueron en triplicado, excepto el proceso de sedimentación que empleó un único tanque para cada tratamiento. La mayor remoción de la turbidez se registró a las 12 h con un valor de 73,44%. La remoción de los sólidos suspendidos totales (SST) y sólidos volátiles totales (SVT) alcanza la mayor eficiencia a las 24 h con 13,17 y 49,06%, respectivamente. La remoción de los nutrientes no presenta una alta eficiencia, no obstante, el fosfato en 12 h se redujo en 82,23%. En el proceso de filtración, la turbidez presenta una alta eficiencia de remoción en todos los TRH evaluados, siendo el mejor resultado 92,57% en 6 h. Para los SST y SVT, los resultados de remoción fueron 29,94 y 75,4%, respectivamente. En este proceso la reducción de los nutrientes nitrogenados fue muy baja, incluso con valores negativos. No obstante, para el fosfato la mayor remoción fue registrada en 12 h con 88,32%. Por su parte, la mayor eficiencia de remoción de bacterias se alcanza en 6 h con 50,21%. En el proceso de absorción, fue obtenida una alta eficiencia de remoción de la turbidez con un valor de 95,24% en 12 h. A su vez, los mejores resultados de remoción de SST y SVT fueron observados a las 24 h con 34,13 y 75,47, respectivamente. En cuanto a los nutrientes nitrogenados, la mayor eficiencia de remoción fue obtenida con el amonio en 12 h con 39,36%. Para el fosfato se registró un valor de 87,31% en el mismo tiempo. Se concluye que los procesos de sedimentación, filtración y absorción, resultan en una potencial herramienta para el tratamiento de los efluentes. Los tratamientos aplicados son especialmente eficientes en la reducción de la turbidez y fosfatos en todos tiempos de retención hidráulica, lo que consecuentemente produce un mejoramiento de la calidad de las aguas residuales que se generan a partir del proceso de producción de S. lalandi.
{"title":"Tratamiento de efluentes del cultivo de Seriola lalandi por sedimentación, filtración y absorción en diferentes tiempos de retención hidráulica","authors":"Roberto Ramos, A. Navarro","doi":"10.22370/rbmo.2019.54.3.2020","DOIUrl":"https://doi.org/10.22370/rbmo.2019.54.3.2020","url":null,"abstract":"A escala de laboratorio se evaluó la eficiencia de remoción de material particulado y nutrientes disueltos contenidos en el efluente generado en la producción del pez Seriola lalandi. Fueron aplicados procesos de sedimentación, filtración por la ostra Crassostrea gigas y absorción por la macroalga Gracilaria chilensis en tiempos de retención hidráulica (TRH) de 6, 12 y 24 h. Se utilizaron tanques cilindro cónico de 150 L de capacidad para el proceso de sedimentación. En los procesos de filtración y absorción se emplearon tanque cilindro cónico de acrílico con 50 L de capacidad. Todos los tratamientos fueron en triplicado, excepto el proceso de sedimentación que empleó un único tanque para cada tratamiento. La mayor remoción de la turbidez se registró a las 12 h con un valor de 73,44%. La remoción de los sólidos suspendidos totales (SST) y sólidos volátiles totales (SVT) alcanza la mayor eficiencia a las 24 h con 13,17 y 49,06%, respectivamente. La remoción de los nutrientes no presenta una alta eficiencia, no obstante, el fosfato en 12 h se redujo en 82,23%. En el proceso de filtración, la turbidez presenta una alta eficiencia de remoción en todos los TRH evaluados, siendo el mejor resultado 92,57% en 6 h. Para los SST y SVT, los resultados de remoción fueron 29,94 y 75,4%, respectivamente. En este proceso la reducción de los nutrientes nitrogenados fue muy baja, incluso con valores negativos. No obstante, para el fosfato la mayor remoción fue registrada en 12 h con 88,32%. Por su parte, la mayor eficiencia de remoción de bacterias se alcanza en 6 h con 50,21%. En el proceso de absorción, fue obtenida una alta eficiencia de remoción de la turbidez con un valor de 95,24% en 12 h. A su vez, los mejores resultados de remoción de SST y SVT fueron observados a las 24 h con 34,13 y 75,47, respectivamente. En cuanto a los nutrientes nitrogenados, la mayor eficiencia de remoción fue obtenida con el amonio en 12 h con 39,36%. Para el fosfato se registró un valor de 87,31% en el mismo tiempo. Se concluye que los procesos de sedimentación, filtración y absorción, resultan en una potencial herramienta para el tratamiento de los efluentes. Los tratamientos aplicados son especialmente eficientes en la reducción de la turbidez y fosfatos en todos tiempos de retención hidráulica, lo que consecuentemente produce un mejoramiento de la calidad de las aguas residuales que se generan a partir del proceso de producción de S. lalandi.","PeriodicalId":347046,"journal":{"name":"Revista de Biología Marina y Oceanografía","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122256465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In terms of fish dynamic population, reproduction is a process related with corporal size of each population member, which is tied with the spawning time and number of eggs produced. In order to relate the size of female little tuny (Euthynnus alletteratus), located in the southwest Gulf of Mexico, and its contribution in reproductive process, cycle and reproductive characteristics were analyzed by different size groups. Biological data were obtained by the artisanal fishing fleet of Antón Lizardo Veracruz community (Mexico). A total of 480 fish were caught from December 2009 to November 2012. Size structure, gonadosomatic index and duration and intensity spawning index were determined. The gonadosomatic index showed a decrease in the population after April and July. Nevertheless, this months and the fraction of spawning female may vary depending on size groups. According with the IDI, the individuals with the highest contribution in reproductive process belong to sizes from 44 to 56 cm. Therefore, in order to guarantee the conservation of this species, it is imperative to mainly direct the management measures towards the females from these sizes.
{"title":"Duración e intensidad de la puesta y su dependencia del tamaño corporal: El caso del bonito Euthynnus alletteratus capturado en el suroeste del Golfo de México","authors":"Roberto Cruz-Castán, César Meiners-Mandujano, Sergio Curiel-Ramírez","doi":"10.22370/rbmo.2019.54.2.1904","DOIUrl":"https://doi.org/10.22370/rbmo.2019.54.2.1904","url":null,"abstract":"In terms of fish dynamic population, reproduction is a process related with corporal size of each population member, which is tied with the spawning time and number of eggs produced. In order to relate the size of female little tuny (Euthynnus alletteratus), located in the southwest Gulf of Mexico, and its contribution in reproductive process, cycle and reproductive characteristics were analyzed by different size groups. Biological data were obtained by the artisanal fishing fleet of Antón Lizardo Veracruz community (Mexico). A total of 480 fish were caught from December 2009 to November 2012. Size structure, gonadosomatic index and duration and intensity spawning index were determined. The gonadosomatic index showed a decrease in the population after April and July. Nevertheless, this months and the fraction of spawning female may vary depending on size groups. According with the IDI, the individuals with the highest contribution in reproductive process belong to sizes from 44 to 56 cm. Therefore, in order to guarantee the conservation of this species, it is imperative to mainly direct the management measures towards the females from these sizes.","PeriodicalId":347046,"journal":{"name":"Revista de Biología Marina y Oceanografía","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123369594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-13DOI: 10.22370/rbmo.2019.54.2.1809
M. Baylón, D. Becerril, A. Indacochea, Sara Purca
El ecosistema antártico es una de las regiones del mundo más sensibles al cambio climático, y presenta amplia variabilidad ambiental que modifican los patrones espaciales y temporales de la estructura fitoplanctónica. Se estudió la comunidad del fitoplancton y su variabilidad espacial y temporal de la ensenada Mackellar-bahía Almirantazgo, Antártida, en los veranos australes de 2012 y 2013. Se hicieron muestreos de agua para fitoplancton y variables ambientales en 11 estaciones a tres profundidades (0, 10 y 20 m). La masa de Agua Superficial Antártica de la zona de estudio fue reconocida. La composición total del fitoplancton en la columna de agua incluyó 40 taxones de diatomeas, 6 taxones de dinoflagelados y varias especies de nanoflagelados (< 20 µm). Los nanoflagelados pertenecen a Prasinophyceae, Cryptophyta y Haptophyta. La alternancia entre diatomeas del microplancton (20-200 µm) y nanoflagelados (< 20 µm) fue evidente durante el período de estudio: en el verano 2012 el grupo de los nanoflagelados fue más abundante (86%), con especies de diatomeas del género Thalassiosira sp. (11%), y para el verano 2013 los nanoflagelados disminuyeron considerablemente (20%), la abundancia del fitoplancton estuvo dominada por diatomeas como Thalassiosira delicatula (36%), Pseudo-nitzschia grupo delicatissima (9%), Porosira glacialis (6%), y el dinoflagelado Gymnodinium sp. (19%). La densidad celular en el verano 2012 fue menor, en comparación con el verano 2013, donde ocurrió una floración de diatomeas. La diversidad del fitoplancton fue baja (< 1,97 bits⋅célula-1) en ambos veranos. Las principales diferencias fueron la dominancia de diatomeas del microplancton y nanoflagelados, las cuales probablemente fueron causadas por la disminución de la salinidad y el aumento de oxígeno superficial observado en la Antártida, producto del deshielo ocurrido durante los veranos 2012 y 2013.
{"title":"Variabilidad espacio-temporal del fitoplancton de la ensenada Mackellar, Bahía Almirantazgo, Isla Rey Jorge, Antártida, durante el verano austral 2012/2013","authors":"M. Baylón, D. Becerril, A. Indacochea, Sara Purca","doi":"10.22370/rbmo.2019.54.2.1809","DOIUrl":"https://doi.org/10.22370/rbmo.2019.54.2.1809","url":null,"abstract":"El ecosistema antártico es una de las regiones del mundo más sensibles al cambio climático, y presenta amplia variabilidad ambiental que modifican los patrones espaciales y temporales de la estructura fitoplanctónica. Se estudió la comunidad del fitoplancton y su variabilidad espacial y temporal de la ensenada Mackellar-bahía Almirantazgo, Antártida, en los veranos australes de 2012 y 2013. Se hicieron muestreos de agua para fitoplancton y variables ambientales en 11 estaciones a tres profundidades (0, 10 y 20 m). La masa de Agua Superficial Antártica de la zona de estudio fue reconocida. La composición total del fitoplancton en la columna de agua incluyó 40 taxones de diatomeas, 6 taxones de dinoflagelados y varias especies de nanoflagelados (< 20 µm). Los nanoflagelados pertenecen a Prasinophyceae, Cryptophyta y Haptophyta. La alternancia entre diatomeas del microplancton (20-200 µm) y nanoflagelados (< 20 µm) fue evidente durante el período de estudio: en el verano 2012 el grupo de los nanoflagelados fue más abundante (86%), con especies de diatomeas del género Thalassiosira sp. (11%), y para el verano 2013 los nanoflagelados disminuyeron considerablemente (20%), la abundancia del fitoplancton estuvo dominada por diatomeas como Thalassiosira delicatula (36%), Pseudo-nitzschia grupo delicatissima (9%), Porosira glacialis (6%), y el dinoflagelado Gymnodinium sp. (19%). La densidad celular en el verano 2012 fue menor, en comparación con el verano 2013, donde ocurrió una floración de diatomeas. La diversidad del fitoplancton fue baja (< 1,97 bits⋅célula-1) en ambos veranos. Las principales diferencias fueron la dominancia de diatomeas del microplancton y nanoflagelados, las cuales probablemente fueron causadas por la disminución de la salinidad y el aumento de oxígeno superficial observado en la Antártida, producto del deshielo ocurrido durante los veranos 2012 y 2013.","PeriodicalId":347046,"journal":{"name":"Revista de Biología Marina y Oceanografía","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125596198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-13DOI: 10.22370/rbmo.2019.54.2.1906
M. Landaeta, J. Vera-Duarte, María J. Ochoa-Muñoz, C. Bustos, F. Balbontín
Feeding habits of the ichthyoplankton from Chilean Patagonia (44-46°30’S) were studied during June-July 2012 (austral winter). Ichthyoplankton assemblage was composed by 10 species, with low abundance (3.8 to 16.73 ind. 1000 m-3). Most abundant larvae were Maurolicus parvipinnis, Leptonotus blainvilleanus and Sprattus fuegensis. These three species fed mainly on calanoid copepodites, Paracalanus indicus and Calanus sp. copepodites, and cyphonautes. Trophic overlap among dominant fish larvae was high (Schoener’s D > 0.69) and no significant differences were detected in prey composition and size. Therefore, no resource partitioning occurred in planktonic fish larvae during winter 2012 in Chilean Patagonia.
{"title":"Feeding ecology of fish larvae from Chilean Patagonia during austral winter","authors":"M. Landaeta, J. Vera-Duarte, María J. Ochoa-Muñoz, C. Bustos, F. Balbontín","doi":"10.22370/rbmo.2019.54.2.1906","DOIUrl":"https://doi.org/10.22370/rbmo.2019.54.2.1906","url":null,"abstract":"Feeding habits of the ichthyoplankton from Chilean Patagonia (44-46°30’S) were studied during June-July 2012 (austral winter). Ichthyoplankton assemblage was composed by 10 species, with low abundance (3.8 to 16.73 ind. 1000 m-3). Most abundant larvae were Maurolicus parvipinnis, Leptonotus blainvilleanus and Sprattus fuegensis. These three species fed mainly on calanoid copepodites, Paracalanus indicus and Calanus sp. copepodites, and cyphonautes. Trophic overlap among dominant fish larvae was high (Schoener’s D > 0.69) and no significant differences were detected in prey composition and size. Therefore, no resource partitioning occurred in planktonic fish larvae during winter 2012 in Chilean Patagonia.","PeriodicalId":347046,"journal":{"name":"Revista de Biología Marina y Oceanografía","volume":"6 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114118784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-13DOI: 10.22370/rbmo.2019.54.2.1905
Ö. Cengiz
This study was carried out, monthly, in the Saros Bay (Northern Aegean Sea, Turkey) between January 2015 and December 2015. The gonadosomatic index (GSI) and absolute fecundity (Fa) of the blotched picarel (Spicara maena) were analyzed . The present study contributes to the reproductive biology of S. maena by reporting the first data about the fecundity of the species for the Aegean Sea
{"title":"Some reproductive characteristics of the blotched picarel Spicara maena (Perciformes: Centracanthidae) from Saros Bay, Northern Aegean Sea, Turkey","authors":"Ö. Cengiz","doi":"10.22370/rbmo.2019.54.2.1905","DOIUrl":"https://doi.org/10.22370/rbmo.2019.54.2.1905","url":null,"abstract":"This study was carried out, monthly, in the Saros Bay (Northern Aegean Sea, Turkey) between January 2015 and December 2015. The gonadosomatic index (GSI) and absolute fecundity (Fa) of the blotched picarel (Spicara maena) were analyzed . The present study contributes to the reproductive biology of S. maena by reporting the first data about the fecundity of the species for the Aegean Sea","PeriodicalId":347046,"journal":{"name":"Revista de Biología Marina y Oceanografía","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133075360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-13DOI: 10.22370/rbmo.2019.54.2.1907
Claudio N. Tobar, D. Carmona, J. Rau, Jaime A. Cursach, Jonnathan Vilugrón
The imperial cormorant (Phalacrocorax atriceps) is one of the most abundant cormorant species in the Chilean channels and fjords. Although its reproductive and non-reproductive distributions have been studied, works on its diet are inexistent. This paper describes the diet and determines the dominance and diversity of the prey consumed during the winter periods of 2011 and 2014 in Caulín Bay, Chiloé, southern Chile. A total of 73 pellets were collected (30 in 2011 and 43 in 2014). Prey were identified and classified into three categories: fishes (53.57%), cephalopods (39.29%) and crustaceans (7.14%). When prey consumption was analyzed according to their distribution in the water column, we observed statistically significant differences in a preference of benthic demersal over pelagic prey.
{"title":"Dieta invernal del cormorán imperial Phalacrocorax atriceps (Aves: Suliformes) en Bahía Caulín, Chiloé, sur de Chile","authors":"Claudio N. Tobar, D. Carmona, J. Rau, Jaime A. Cursach, Jonnathan Vilugrón","doi":"10.22370/rbmo.2019.54.2.1907","DOIUrl":"https://doi.org/10.22370/rbmo.2019.54.2.1907","url":null,"abstract":"The imperial cormorant (Phalacrocorax atriceps) is one of the most abundant cormorant species in the Chilean channels and fjords. Although its reproductive and non-reproductive distributions have been studied, works on its diet are inexistent. This paper describes the diet and determines the dominance and diversity of the prey consumed during the winter periods of 2011 and 2014 in Caulín Bay, Chiloé, southern Chile. A total of 73 pellets were collected (30 in 2011 and 43 in 2014). Prey were identified and classified into three categories: fishes (53.57%), cephalopods (39.29%) and crustaceans (7.14%). When prey consumption was analyzed according to their distribution in the water column, we observed statistically significant differences in a preference of benthic demersal over pelagic prey.","PeriodicalId":347046,"journal":{"name":"Revista de Biología Marina y Oceanografía","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125470776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-13DOI: 10.22370/rbmo.2019.54.2.1881
M. Montes, A. Castro, Joel Linares, L. Orihuela, L. Carrera
Peruvian grunt Anisotremus scapularis is distributed from Ecuador to Chile and it is considered an important aquaculture resource in Peru. Knowledge of embryonic development is crucial because it is part of the basic biology of a species. The aim of this study was to describe the embryonic stages of Peruvian grunt. The eggs were obtained by natural spawning and reared at 19 °C under laboratory conditions. Morphometric characteristics of the egg were evaluated: diameter (0.752 ± 0.025 mm) (mean ± sd) and oil globule diameter (0.165 ± 0.014 mm). The first division was observed approximately 45 min after fertilization. Blastula stage started after 4 h and the middle gastrula stage after 12:30 h. Early neurula was observed 17 h after fertilization. Cardiac beats and movements of the free embryonic tail were recorded after 30 h of incubation. Hatching occurred between 31 to 41 h and length of newly hatched larvae was 2.558 ± 0.051 mm. The embryonic development of this species is similar to previous studies regarding other marine fish. This study is the first report of embryonic development of A. scapularis, which is a valuable information that provide a baseline reference for the efforts for the culture of this species.
{"title":"Embryonic development of Peruvian grunt Anisotremus scapularis (Perciformes: Haemulidae)","authors":"M. Montes, A. Castro, Joel Linares, L. Orihuela, L. Carrera","doi":"10.22370/rbmo.2019.54.2.1881","DOIUrl":"https://doi.org/10.22370/rbmo.2019.54.2.1881","url":null,"abstract":"Peruvian grunt Anisotremus scapularis is distributed from Ecuador to Chile and it is considered an important aquaculture resource in Peru. Knowledge of embryonic development is crucial because it is part of the basic biology of a species. The aim of this study was to describe the embryonic stages of Peruvian grunt. The eggs were obtained by natural spawning and reared at 19 °C under laboratory conditions. Morphometric characteristics of the egg were evaluated: diameter (0.752 ± 0.025 mm) (mean ± sd) and oil globule diameter (0.165 ± 0.014 mm). The first division was observed approximately 45 min after fertilization. Blastula stage started after 4 h and the middle gastrula stage after 12:30 h. Early neurula was observed 17 h after fertilization. Cardiac beats and movements of the free embryonic tail were recorded after 30 h of incubation. Hatching occurred between 31 to 41 h and length of newly hatched larvae was 2.558 ± 0.051 mm. The embryonic development of this species is similar to previous studies regarding other marine fish. This study is the first report of embryonic development of A. scapularis, which is a valuable information that provide a baseline reference for the efforts for the culture of this species.","PeriodicalId":347046,"journal":{"name":"Revista de Biología Marina y Oceanografía","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122760492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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