Nelly Alejandra Jerez-Ramírez, S. L. Arriaga-Weiss, Gorgonio Ruiz-Campos, Lilia María Gama-Campillo, Miguel Ángel Salcedo-Mesa, Claudia Villanueva-García, E. E. Mata-Zayas, J. D. D. Valdez-Leal
En la laguna de las Ilusiones, Villahermosa, Tabasco, México, las especies de aves interactúan con elementos antrópicos del paisaje. Se realizaron avistamientos de aves acuáticas con el método de conteo por punto fijo durante la temporada de secas y de lluvias del año 2020 en 12 sitios de muestreo en la laguna. Se registraron variables urbanísticas, físicoquímicas del agua, de vegetación y de macrohábitats para evaluar su influencia en las aves acuáticas. Se registró un total de 1,134 individuos pertenecientes a 8 órdenes, 12 familias y 25 especies. Las especies más avistadas fueron Ardea alba, Egretta thula y Butorides virescens. La diversidad de especies (índice de Shannon) fue mayor en la temporada de secas (H = 2.40 bits) y menor en la temporada de lluvias (H = 1.89 bits). El análisis canónico demostró que la riqueza de especies disminuyó a medida que incrementó el porcentaje de urbanización en las inmediaciones de los sitios de muestreo.
在墨西哥塔巴斯科Villahermosa的laguna de las Ilusiones，鸟类物种与景观中的人为元素相互作用。在2020年的旱季和雨季，采用定点计数法在泻湖的12个采样点进行了水鸟目测。本研究的目的是评估水鸟对环境的影响。在本研究中，我们评估了该地区的物种多样性，并确定了该地区特有的物种。最常见的物种是白鹭、白鹭和白鹭。在旱季(H = 2.40位)和雨季(H = 1.89位)，物种多样性(Shannon指数)较高。本研究的目的是确定在墨西哥北部和中部地区的三个地点，以及在墨西哥北部和中部地区的三个地点，物种丰富度和物种丰富度的差异。
{"title":"Composición y diversidad espaciotemporal de la comunidad de aves acuáticas en la laguna de las Ilusiones, Tabasco, México","authors":"Nelly Alejandra Jerez-Ramírez, S. L. Arriaga-Weiss, Gorgonio Ruiz-Campos, Lilia María Gama-Campillo, Miguel Ángel Salcedo-Mesa, Claudia Villanueva-García, E. E. Mata-Zayas, J. D. D. Valdez-Leal","doi":"10.7773/cm.y2023.3355","DOIUrl":"https://doi.org/10.7773/cm.y2023.3355","url":null,"abstract":"En la laguna de las Ilusiones, Villahermosa, Tabasco, México, las especies de aves interactúan con elementos antrópicos del paisaje. Se realizaron avistamientos de aves acuáticas con el método de conteo por punto fijo durante la temporada de secas y de lluvias del año 2020 en 12 sitios de muestreo en la laguna. Se registraron variables urbanísticas, físicoquímicas del agua, de vegetación y de macrohábitats para evaluar su influencia en las aves acuáticas. Se registró un total de 1,134 individuos pertenecientes a 8 órdenes, 12 familias y 25 especies. Las especies más avistadas fueron Ardea alba, Egretta thula y Butorides virescens. La diversidad de especies (índice de Shannon) fue mayor en la temporada de secas (H = 2.40 bits) y menor en la temporada de lluvias (H = 1.89 bits). El análisis canónico demostró que la riqueza de especies disminuyó a medida que incrementó el porcentaje de urbanización en las inmediaciones de los sitios de muestreo.","PeriodicalId":50702,"journal":{"name":"Ciencias Marinas","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47130866","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}
Marlene Zamora-Machado, Alejandro Adolfo Lambert-Arista, O. R. García-Cueto, Oscar Alfredo Jaramillo-Salgado, Elia Leyva-Sánchez, Rafael Carlos Reynaga-López, Jesús Rigoberto Herrera-García, Noemí Lizárraga-Osuna, Rosa Citlalli Anguiano-Cota
La región de La Rumorosa, localizada en el noroeste de México, se caracteriza por sus fuertes velocidades en la magnitud del viento a nivel local, lo que ha originado la instalación de parques eólicos. En esta zona, no se conoce de forma precisa la contribución de energía eléctrica eólica de los vientos de Santa Ana (VSA), que son parte del régimen de viento regional. Además los vientos de valle-montaña, los frentes fríos, las tormentas extratropicales y otros fenómenos meteorológicos, en conjunto, contribuyen a la totalidad de energía eléctrica generada. Por ello, este estudio se centra en clasificar, por un periodo temporal de 10 años (2005-2014), los eventos de VSA considerando las categorías: “débil”, “moderado” y “fuerte”. En el análisis se aplicaron criterios asociados a los parámetros de la magnitud de la velocidad promedio del viento, el gradiente de presión adimensional y la normalización de valores de presión, magnitud de la velocidad de ráfaga y magnitud de la velocidad promedio del viento. La clasificación propuesta proporciona información sobre el comportamiento de los VSA en la zona y, por ende, su contribución en la generación de energía eólica en La Rumorosa.
La Rumorosa地区位于墨西哥西北部，其特点是当地风速大，这导致了风力发电场的安装。在这个地区，圣安娜风(VSA)风力发电的确切贡献尚不清楚，这是区域风况的一部分。此外，山谷-山区风、冷锋、温带风暴和其他气象现象共同贡献了总发电量。因此，本研究的重点是对10年(2005-2014年)的VSA事件进行分类，考虑以下类别:“弱”、“中度”和“强”。在分析中应用了与平均风速大小、无量程压力梯度和压力值标准化、风速大小和平均风速大小等参数相关的标准。提出的分类提供了关于该地区VSA行为的信息，从而提供了它们对Rumorosa风力发电的贡献。
{"title":"Clasificación de los vientos de Santa Ana para la evaluación de su potencial eólico en La Rumorosa, Baja California, México","authors":"Marlene Zamora-Machado, Alejandro Adolfo Lambert-Arista, O. R. García-Cueto, Oscar Alfredo Jaramillo-Salgado, Elia Leyva-Sánchez, Rafael Carlos Reynaga-López, Jesús Rigoberto Herrera-García, Noemí Lizárraga-Osuna, Rosa Citlalli Anguiano-Cota","doi":"10.7773/cm.y2023.3358","DOIUrl":"https://doi.org/10.7773/cm.y2023.3358","url":null,"abstract":"La región de La Rumorosa, localizada en el noroeste de México, se caracteriza por sus fuertes velocidades en la magnitud del viento a nivel local, lo que ha originado la instalación de parques eólicos. En esta zona, no se conoce de forma precisa la contribución de energía eléctrica eólica de los vientos de Santa Ana (VSA), que son parte del régimen de viento regional. Además los vientos de valle-montaña, los frentes fríos, las tormentas extratropicales y otros fenómenos meteorológicos, en conjunto, contribuyen a la totalidad de energía eléctrica generada. Por ello, este estudio se centra en clasificar, por un periodo temporal de 10 años (2005-2014), los eventos de VSA considerando las categorías: “débil”, “moderado” y “fuerte”. En el análisis se aplicaron criterios asociados a los parámetros de la magnitud de la velocidad promedio del viento, el gradiente de presión adimensional y la normalización de valores de presión, magnitud de la velocidad de ráfaga y magnitud de la velocidad promedio del viento. La clasificación propuesta proporciona información sobre el comportamiento de los VSA en la zona y, por ende, su contribución en la generación de energía eólica en La Rumorosa.","PeriodicalId":50702,"journal":{"name":"Ciencias Marinas","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48540537","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}
Leucism has been reported in at least 14 cetacean species, including Risso’s dolphin (Grampus griseus). Risso’s dolphins with abnormal pigmentation were sighted and photographed north of Faial Island, Azores Archipelago, in 6 separate events between 2020 and 2023. In 2020, a calf and a juvenile/subadult were observed within a group of over 100 individuals. A leucistic calf with pale skin and dark eyes was observed in 2021, 2022, and 2023 in the same area followed by the same adult within a pod of about 12 individuals, including 3 juveniles, all with normal coloration. This is the first report of wild leucistic Risso’s dolphins in the Atlantic, which could be of interest in future local population and hypopigmentation studies on a dolphin species known to become completely white with age.
{"title":"Wild leucistic Risso’s dolphins (Grampus griseus) in the Azores","authors":"J. Gomes-Pereira, S. Vieira, G. Dionísio","doi":"10.7773/cm.y2023.3341","DOIUrl":"https://doi.org/10.7773/cm.y2023.3341","url":null,"abstract":"Leucism has been reported in at least 14 cetacean species, including Risso’s dolphin (Grampus griseus). Risso’s dolphins with abnormal pigmentation were sighted and photographed north of Faial Island, Azores Archipelago, in 6 separate events between 2020 and 2023. In 2020, a calf and a juvenile/subadult were observed within a group of over 100 individuals. A leucistic calf with pale skin and dark eyes was observed in 2021, 2022, and 2023 in the same area followed by the same adult within a pod of about 12 individuals, including 3 juveniles, all with normal coloration. This is the first report of wild leucistic Risso’s dolphins in the Atlantic, which could be of interest in future local population and hypopigmentation studies on a dolphin species known to become completely white with age.","PeriodicalId":50702,"journal":{"name":"Ciencias Marinas","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48176778","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}
Norma Olguín-López, V. H. Hernández-Elizárraga, Rosalina Hernández-Matehuala, J. I. Rojas-Molina, R. Guevara-González, César Ibarra-Alvarado, Alejandra Rojas- Molina
Reef-forming cnidarians are essential for maintaining ecological balance. Unfortunately, coral reefs are endangered due to coral bleaching, which interrupts mutualistic symbiosis between Symbiodiniaceae algae and their coral hosts. Bleaching events result in very high coral mortality and the rapid deterioration of reef structures. Studies aimed at explaining the causes, mechanisms, and consequences of coral bleaching have been mainly conducted with anthozoans, while the impacts of thermal stress responsible for coral bleaching have been scarcely studied in hydrozoans, such as Millepora species (phylum Cnidaria, class Hydrozoa), which are the second most important reef-forming cnidarians. In the present study, the effects of thermal stress caused by the 2015–2016 El Niño on symbiont abundance, exoskeleton structure, and the biochemical composition of Millepora alcicornis were analyzed. Unbleached M. alcicornis specimens exhibited a higher abundance of Breviolum and Durisdinium species, which suggests that unbleached hydrocoral colonies might counteract thermal stress by hosting thermotolerant symbionts of the Durisdinium genus. Bleached hydrocorals exhibited lower levels of calcification than unbleached hydrocorals as well as changes in the microstructure of trabeculae and zooid pores. In contrast, thermal stress did not affect total calcium carbonate and carbohydrate content. Bleached tissues showed significantly higher levels of protein and refractory material, whereas their lipid content decreased considerably. The present study provides evidence that bleached M. alcicornis colonies suffered a decline in calcification and changes in the structure of their exoskeletons after being exposed to the 2015–2016 El Niño. The significant decrease in lipid content suggests that M. alcicornis primarily uses energy stores to maintain vital cellular processes at the expense of calcification.
{"title":"Effects of thermal stress caused by the 2015–2016 El Niño on the biochemical composition, exoskeleton structure, and symbiont density of the fire coral Millepora alcicornis","authors":"Norma Olguín-López, V. H. Hernández-Elizárraga, Rosalina Hernández-Matehuala, J. I. Rojas-Molina, R. Guevara-González, César Ibarra-Alvarado, Alejandra Rojas- Molina","doi":"10.7773/cm.y2023.3296","DOIUrl":"https://doi.org/10.7773/cm.y2023.3296","url":null,"abstract":"Reef-forming cnidarians are essential for maintaining ecological balance. Unfortunately, coral reefs are endangered due to coral bleaching, which interrupts mutualistic symbiosis between Symbiodiniaceae algae and their coral hosts. Bleaching events result in very high coral mortality and the rapid deterioration of reef structures. Studies aimed at explaining the causes, mechanisms, and consequences of coral bleaching have been mainly conducted with anthozoans, while the impacts of thermal stress responsible for coral bleaching have been scarcely studied in hydrozoans, such as Millepora species (phylum Cnidaria, class Hydrozoa), which are the second most important reef-forming cnidarians. In the present study, the effects of thermal stress caused by the 2015–2016 El Niño on symbiont abundance, exoskeleton structure, and the biochemical composition of Millepora alcicornis were analyzed. Unbleached M. alcicornis specimens exhibited a higher abundance of Breviolum and Durisdinium species, which suggests that unbleached hydrocoral colonies might counteract thermal stress by hosting thermotolerant symbionts of the Durisdinium genus. Bleached hydrocorals exhibited lower levels of calcification than unbleached hydrocorals as well as changes in the microstructure of trabeculae and zooid pores. In contrast, thermal stress did not affect total calcium carbonate and carbohydrate content. Bleached tissues showed significantly higher levels of protein and refractory material, whereas their lipid content decreased considerably. The present study provides evidence that bleached M. alcicornis colonies suffered a decline in calcification and changes in the structure of their exoskeletons after being exposed to the 2015–2016 El Niño. The significant decrease in lipid content suggests that M. alcicornis primarily uses energy stores to maintain vital cellular processes at the expense of calcification.","PeriodicalId":50702,"journal":{"name":"Ciencias Marinas","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46837955","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}
Pleuroncodes monodon es 1 de las 3 especies que sustentan las pesquerías demersales de crustáceos en Chile, con niveles de desembarque que han mostrado amplias variaciones y una muy lenta recuperación en la última década. La unidad de pesquería sur se encuentra en estado de recuperación desde 2017, después de una intensa sobrepesca, la que afectó tanto al potencial reproductivo como a la distribución geográfica del stock. En el presente estudio, se usó información de lances de pesca de 14 campañas de evaluación directa de P. monodon para estimar la densidad del potencial reproductivo del stock de hembras en el periodo 2005-2018 en la zona centro-sur (32.0° S a 37.0° S) de Chile mediante un análisis geoestadístico. El promedio anual de huevos potenciales se estimó en 78,055.0 millones de huevos potenciales, con una densidad promedio de 74.0 millones de huevos por kilómetro cuadrado. Se reconocieron 2 zonas de agregación del potencial reproductivo, una entre 33.5° S y 34.5° S (zona norte) y otra entre 35.5° S y 36.5° S (zona sur). La densidad promedio de huevos potenciales fue mayor en la zona norte que en la zona sur, aunque en la zona sur se localizaron focos con máximos cercanos a 100 millones de huevos por kilómetro cuadrado, lo que no ocurrió en la zona norte. La población de P. monodon proviene de una sola área de cría, ubicada en la zona sur. En el periodo de 2008 a 2012, el stock de hembras presentó una migración neta con rumbo norte de casi 226.4 km (desde 36°20ʹ52.5ʺ S hasta 34°18ʹ39.1ʺ S), aunque posteriormente se redujo con rumbo norte-sur por la presión pesquera.
{"title":"Distribución espaciotemporal del potencial reproductivo del stock de hembras de langostino colorado (Pleuroncodes monodon) en la zona centro-sur de Chile","authors":"Mónica E Barros, Rubén Alarcón, H. Arancibia","doi":"10.7773/cm.y2023.3321","DOIUrl":"https://doi.org/10.7773/cm.y2023.3321","url":null,"abstract":"Pleuroncodes monodon es 1 de las 3 especies que sustentan las pesquerías demersales de crustáceos en Chile, con niveles de desembarque que han mostrado amplias variaciones y una muy lenta recuperación en la última década. La unidad de pesquería sur se encuentra en estado de recuperación desde 2017, después de una intensa sobrepesca, la que afectó tanto al potencial reproductivo como a la distribución geográfica del stock. En el presente estudio, se usó información de lances de pesca de 14 campañas de evaluación directa de P. monodon para estimar la densidad del potencial reproductivo del stock de hembras en el periodo 2005-2018 en la zona centro-sur (32.0° S a 37.0° S) de Chile mediante un análisis geoestadístico. El promedio anual de huevos potenciales se estimó en 78,055.0 millones de huevos potenciales, con una densidad promedio de 74.0 millones de huevos por kilómetro cuadrado. Se reconocieron 2 zonas de agregación del potencial reproductivo, una entre 33.5° S y 34.5° S (zona norte) y otra entre 35.5° S y 36.5° S (zona sur). La densidad promedio de huevos potenciales fue mayor en la zona norte que en la zona sur, aunque en la zona sur se localizaron focos con máximos cercanos a 100 millones de huevos por kilómetro cuadrado, lo que no ocurrió en la zona norte. La población de P. monodon proviene de una sola área de cría, ubicada en la zona sur. En el periodo de 2008 a 2012, el stock de hembras presentó una migración neta con rumbo norte de casi 226.4 km (desde 36°20ʹ52.5ʺ S hasta 34°18ʹ39.1ʺ S), aunque posteriormente se redujo con rumbo norte-sur por la presión pesquera.","PeriodicalId":50702,"journal":{"name":"Ciencias Marinas","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43179269","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}
Eliana Gómez-Robles, Héctor Acosta-Salmón, J. Mazón-Suástegui, Pedro E. Saucedo
Se estudió el desempeño reproductivo y larvario de Pteria sterna en relación a factores ambientales anómalos, hipotetizando que la transición entre los eventos de La Niña y El Niño 2008-2009 afectó los periodos “normales” para recolectar reproductores maduros y cultivar larvas en laboratorio. Se realizaron muestreos estacionales en 2 periodos reproductivos (febrero y abril 2009), 1 periodo pre-reproductivo (noviembre 2008) y 1 periodo post-reproductivo (junio 2009). De las 40 ostras recolectadas en cada periodo, 20 se utilizaron para evaluar el desove y cultivo larvario y 20 para determinar indicadores de condición reproductiva. La temperatura, salinidad y contenido de seston se monitorearon en cada periodo. Los datos de temperatura superficial del mar (TSM) asociados a condiciones ambientales anómalas se obtuvieron del satélite Aqua-MODIS. Las variaciones en la TSM afectaron más el desempeño reproductivo que el desempeño larvario de Pteria sterna. La inducción al desove falló en noviembre 2008 y fue exitosa en febrero, abril y junio 2009, aunque solo en abril las larvas completaron la metamorfosis y se fijaron, a partir de reproductores más maduros, ovocitos más grandes y condiciones ambientales favorables (21.80 °C; ~31 mg·L–1 seston total; +0.50 °C TSM). Las anomalías positivas de TSM (+0.50 a +1.10 °C) de agosto a diciembre 2008 favorecieron un verano más largo que afectó el desove de febrero 2009. En junio 2009 (22.50 °C, 29.5 mg·L–1 seston total, +0.40 °C TSM), cuando los porcentajes de gónadas y ovocitos maduros eran bajos, las larvas no fueron viables y pocas semillas se fijaron. Además de recolectar reproductores maduros en invierno-primavera para una viabilidad óptima de las larvas y semillas, recomendamos incluir un breve periodo de acondicionamiento en el laboratorio después del pico de desove y un segundo a finales del otoño para promover el reciclaje de nutrientes y la recuperación natural de gametos.
{"title":"Variaciones estacionales en el desempeño reproductivo y larvario de la concha nácar Pteria sterna asociadas con condiciones ambientales anómalas","authors":"Eliana Gómez-Robles, Héctor Acosta-Salmón, J. Mazón-Suástegui, Pedro E. Saucedo","doi":"10.7773/cm.y2023.3353","DOIUrl":"https://doi.org/10.7773/cm.y2023.3353","url":null,"abstract":"Se estudió el desempeño reproductivo y larvario de Pteria sterna en relación a factores ambientales anómalos, hipotetizando que la transición entre los eventos de La Niña y El Niño 2008-2009 afectó los periodos “normales” para recolectar reproductores maduros y cultivar larvas en laboratorio. Se realizaron muestreos estacionales en 2 periodos reproductivos (febrero y abril 2009), 1 periodo pre-reproductivo (noviembre 2008) y 1 periodo post-reproductivo (junio 2009). De las 40 ostras recolectadas en cada periodo, 20 se utilizaron para evaluar el desove y cultivo larvario y 20 para determinar indicadores de condición reproductiva. La temperatura, salinidad y contenido de seston se monitorearon en cada periodo. Los datos de temperatura superficial del mar (TSM) asociados a condiciones ambientales anómalas se obtuvieron del satélite Aqua-MODIS. Las variaciones en la TSM afectaron más el desempeño reproductivo que el desempeño larvario de Pteria sterna. La inducción al desove falló en noviembre 2008 y fue exitosa en febrero, abril y junio 2009, aunque solo en abril las larvas completaron la metamorfosis y se fijaron, a partir de reproductores más maduros, ovocitos más grandes y condiciones ambientales favorables (21.80 °C; ~31 mg·L–1 seston total; +0.50 °C TSM). Las anomalías positivas de TSM (+0.50 a +1.10 °C) de agosto a diciembre 2008 favorecieron un verano más largo que afectó el desove de febrero 2009. En junio 2009 (22.50 °C, 29.5 mg·L–1 seston total, +0.40 °C TSM), cuando los porcentajes de gónadas y ovocitos maduros eran bajos, las larvas no fueron viables y pocas semillas se fijaron. Además de recolectar reproductores maduros en invierno-primavera para una viabilidad óptima de las larvas y semillas, recomendamos incluir un breve periodo de acondicionamiento en el laboratorio después del pico de desove y un segundo a finales del otoño para promover el reciclaje de nutrientes y la recuperación natural de gametos.","PeriodicalId":50702,"journal":{"name":"Ciencias Marinas","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48718896","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}
J. Ruelas-Inzunza, C. Delgado-Alvarez, O. Escobar-Sánchez, M. Frías-Espericueta
Mercury (Hg) is mainly incorporated into humans through the consumption of contaminated foods. Mercury was measured and the methyl-Hg (MeHg) concentration was estimated in canned mollusks sold in northwestern Mexico to assess the health risk to consumers. Five mollusk types were considered: oysters, clams, octopuses, mussels, and squids. The Hg concentration of mussels was significantly (P < 0.05) lower than those of the other bivalves (oysters and clams) and cephalopods (squids and octopuses). The average Hg concentration in bivalves (0.013 mg·kg–1) was significantly (P < 0.05) lower than that of cephalopods (0.018 mg·kg–1). The estimated MeHg concentrations were also lower in bivalves than in cephalopods. Based on our results, no health risk is associated with the consumption of canned mollusks that are sold in northwestern Mexico. The Hg and MeHg concentrations followed the order of octopuses > squids = clams > oysters > mussels. The Hg and MeHg concentrations in the mollusks evaluated in this study were below the maximum permissible limits for human consumption in Mexico.
{"title":"Mercury concentrations in domestic and imported canned bivalves and cephalopods sold in northwestern Mexico","authors":"J. Ruelas-Inzunza, C. Delgado-Alvarez, O. Escobar-Sánchez, M. Frías-Espericueta","doi":"10.7773/cm.y2023.3393","DOIUrl":"https://doi.org/10.7773/cm.y2023.3393","url":null,"abstract":"Mercury (Hg) is mainly incorporated into humans through the consumption of contaminated foods. Mercury was measured and the methyl-Hg (MeHg) concentration was estimated in canned mollusks sold in northwestern Mexico to assess the health risk to consumers. Five mollusk types were considered: oysters, clams, octopuses, mussels, and squids. The Hg concentration of mussels was significantly (P < 0.05) lower than those of the other bivalves (oysters and clams) and cephalopods (squids and octopuses). The average Hg concentration in bivalves (0.013 mg·kg–1) was significantly (P < 0.05) lower than that of cephalopods (0.018 mg·kg–1). The estimated MeHg concentrations were also lower in bivalves than in cephalopods. Based on our results, no health risk is associated with the consumption of canned mollusks that are sold in northwestern Mexico. The Hg and MeHg concentrations followed the order of octopuses > squids = clams > oysters > mussels. The Hg and MeHg concentrations in the mollusks evaluated in this study were below the maximum permissible limits for human consumption in Mexico.","PeriodicalId":50702,"journal":{"name":"Ciencias Marinas","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45888189","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}
Lina Angélica Zermeño‐Cervantes, A. Barraza, H. A. González-Ponce, S. Martinez-Diaz, C. Cardona‐Félix
White shrimp, Penaeus vannamei, farming represents one of the most important aquaculture activities in the world with a high growth rate. However, intensification processes induce negative side effects on the health of the organism, associated with a dysbiosis phenomenon. Consequently, illnesses, mainly attributable to Vibrio genus bacteria, have been reported in shrimp ponds. Studying the diversity and ecology of the associated bacteria in aquaculture systems is essential to prevent and control diseases. Therefore, the present study analyzes the bacterial load and microbial population variation in P. vannamei hepatopancreases infected with a pathogenic Vibrio parahaemolyticus strain (so-called CVP2) associated with acute hepatopancreatic necrosis disease (AHPND) under controlled conditions. The results showed an important change in the microbial community structure of the P. vannamei hepatopancreas. Furthermore, the presence of the Vibrio genus considerably increased and clearly dominated compared with the control. Dysbiosis of the hepatopancreatic microbiota and constrictions in the hepatopancreatic tubules (characteristic signs of in the early stage of AHPND) could be observed before the visible manifestation of the disease.
{"title":"Penaeus vannamei challenged with a Vibrio parahaemolyticus AHPND strain shows hepatopancreatic microbiota imbalance","authors":"Lina Angélica Zermeño‐Cervantes, A. Barraza, H. A. González-Ponce, S. Martinez-Diaz, C. Cardona‐Félix","doi":"10.7773/cm.y2023.3234","DOIUrl":"https://doi.org/10.7773/cm.y2023.3234","url":null,"abstract":"White shrimp, Penaeus vannamei, farming represents one of the most important aquaculture activities in the world with a high growth rate. However, intensification processes induce negative side effects on the health of the organism, associated with a dysbiosis phenomenon. Consequently, illnesses, mainly attributable to Vibrio genus bacteria, have been reported in shrimp ponds. Studying the diversity and ecology of the associated bacteria in aquaculture systems is essential to prevent and control diseases. Therefore, the present study analyzes the bacterial load and microbial population variation in P. vannamei hepatopancreases infected with a pathogenic Vibrio parahaemolyticus strain (so-called CVP2) associated with acute hepatopancreatic necrosis disease (AHPND) under controlled conditions. The results showed an important change in the microbial community structure of the P. vannamei hepatopancreas. Furthermore, the presence of the Vibrio genus considerably increased and clearly dominated compared with the control. Dysbiosis of the hepatopancreatic microbiota and constrictions in the hepatopancreatic tubules (characteristic signs of in the early stage of AHPND) could be observed before the visible manifestation of the disease.","PeriodicalId":50702,"journal":{"name":"Ciencias Marinas","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43346761","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}
Kléver Mendoza-Nieto, Mila C-Soriguer Escofet, M. Carrera-Fernández
The Peruvian moonfish (Selene peruviana) is an important fisheries resource that is landed in the main fishing harbors of Ecuador. At the local level, little information is available regarding the biology of this species, which hinders the development of management plans. The present study evaluates the reproductive characteristics of S. peruviana such as the size at sexual maturity and reproductive cycle. Specimens were obtained from artisanal and industrial catches from January 2017 to December 2018. The morphometric characteristics, sex, and maturity stage of 886 specimens were determined, and the gonadosomatic index (GSI), hepatosomatic index (HSI), and relative condition factor (Kn) were estimated. The length-weight relationship and length at sexual maturity (L50) were evaluated with an allometry equation and multi-model analyses, respectively. The mean capture size (total length, TL) was 23.62 cm for males and 22.97 cm for females. A sex ratio (M:F) of 0.70:1.00 (χ2 = 26.28, P < 0.05) was obtained. The allometric factor of the length-weight relationship for both sexes (b) was 2.63 (t = 12.16, P < 0.05), and the coefficient of determination (r2) was 0.89, which suggests that negative allometric growth was present. The L50 (TL) was estimated to be 22.61, 23.86, and 23.27 cm for males, females, and sexes combined, respectively. The monthly GSI, HSI, and Kn values were significantly different (K-W, P < 0.05) among study months. The maximum GSI values were observed in February and March, which constituted the period of highest reproductive activity. The HSI and Kn values exhibited similar trends. The size at sexual maturity was similar to the average catch size, which could indicate that S. peruviana is currently at the limit of its optimal catch size.
秘鲁月鱼(Selene peruviana)是厄瓜多尔主要渔港的重要渔业资源。在地方一级，关于这一物种的生物学资料很少，这妨碍了管理计划的制定。本研究评估了秘鲁沙蚕的生殖特征，如性成熟时的大小和生殖周期。2017年1月至2018年12月从手工和工业捕捞中获得标本。测定886只标本的形态特征、性别和成熟期，并估算其性腺指数(GSI)、肝体指数(HSI)和相对条件因子(Kn)。利用异速生长方程和多模型分析分别评价了长度-重量关系和性成熟长度(L50)。平均捕获大小(总长度，TL)雄性为23.62 cm，雌性为22.97 cm。性别比(M:F)为0.70:1.00 (χ2 = 26.28, P < 0.05)。两性长重关系的异速生长因子(b)为2.63 (t = 12.16, P < 0.05)，决定系数(r2)为0.89，表明存在负异速生长。L50 (TL)雄性为22.61 cm，雌性为23.86 cm，两性合为23.27 cm。各月GSI、HSI、Kn值差异有统计学意义(K-W, P < 0.05)。2月和3月GSI值最大，是繁殖活性最高的时期。HSI和Kn值表现出相似的变化趋势。性成熟时的渔获量与平均渔获量相近，说明秘鲁海螺目前处于最佳渔获量的极限。
{"title":"Reproductive cycle and sexual maturity size of landed Selene peruviana (Perciformes: Carangidae) on the coasts of the Ecuadorian Pacific","authors":"Kléver Mendoza-Nieto, Mila C-Soriguer Escofet, M. Carrera-Fernández","doi":"10.7773/cm.y2023.3363","DOIUrl":"https://doi.org/10.7773/cm.y2023.3363","url":null,"abstract":"The Peruvian moonfish (Selene peruviana) is an important fisheries resource that is landed in the main fishing harbors of Ecuador. At the local level, little information is available regarding the biology of this species, which hinders the development of management plans. The present study evaluates the reproductive characteristics of S. peruviana such as the size at sexual maturity and reproductive cycle. Specimens were obtained from artisanal and industrial catches from January 2017 to December 2018. The morphometric characteristics, sex, and maturity stage of 886 specimens were determined, and the gonadosomatic index (GSI), hepatosomatic index (HSI), and relative condition factor (Kn) were estimated. The length-weight relationship and length at sexual maturity (L50) were evaluated with an allometry equation and multi-model analyses, respectively. The mean capture size (total length, TL) was 23.62 cm for males and 22.97 cm for females. A sex ratio (M:F) of 0.70:1.00 (χ2 = 26.28, P < 0.05) was obtained. The allometric factor of the length-weight relationship for both sexes (b) was 2.63 (t = 12.16, P < 0.05), and the coefficient of determination (r2) was 0.89, which suggests that negative allometric growth was present. The L50 (TL) was estimated to be 22.61, 23.86, and 23.27 cm for males, females, and sexes combined, respectively. The monthly GSI, HSI, and Kn values were significantly different (K-W, P < 0.05) among study months. The maximum GSI values were observed in February and March, which constituted the period of highest reproductive activity. The HSI and Kn values exhibited similar trends. The size at sexual maturity was similar to the average catch size, which could indicate that S. peruviana is currently at the limit of its optimal catch size.","PeriodicalId":50702,"journal":{"name":"Ciencias Marinas","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44359575","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}
Mariana F Cavalcanti, Paula AS Chaddad, Érika Santos, Betânia C Guilherme
Sandy beaches are among the most extensive coastal ecosystems in Brazil and constitute important buffer zones between terrestrial and marine environments. The present study aimed to analyze the distribution and spatiotemporal variation of the meiofaunal community of an urban tropical sandy beach in northeastern Brazil with a particular focus on nematofauna. We set up 4 transects during 2 sampling periods to evaluate different beach zones. The meiofauna comprised 8 taxa, and the nematofauna consisted of 5 orders, 16 families, and 45 genera. The meiofaunal communities followed the qualitative-quantitative standards of those of other tropical sandy beaches in northeastern Brazil. The nematofaunal community showed variation in its composition and trophic structure between dry and rainy months, which were not significantly correlated with granulometric characteristics. This suggests that other variables may influence the structure of nematofaunal communities in Gaibu Beach. Further research on the biodiversity of the meiofaunal communities on sandy beaches in northeastern Brazil is urgently needed given the lack of available information of these environments and the extreme stress they are currently under.
{"title":"Structure of meiofaunal communities in an urban tropical sandy beach in Pernambuco, Brazil","authors":"Mariana F Cavalcanti, Paula AS Chaddad, Érika Santos, Betânia C Guilherme","doi":"10.7773/cm.y2023.3294","DOIUrl":"https://doi.org/10.7773/cm.y2023.3294","url":null,"abstract":"Sandy beaches are among the most extensive coastal ecosystems in Brazil and constitute important buffer zones between terrestrial and marine environments. The present study aimed to analyze the distribution and spatiotemporal variation of the meiofaunal community of an urban tropical sandy beach in northeastern Brazil with a particular focus on nematofauna. We set up 4 transects during 2 sampling periods to evaluate different beach zones. The meiofauna comprised 8 taxa, and the nematofauna consisted of 5 orders, 16 families, and 45 genera. The meiofaunal communities followed the qualitative-quantitative standards of those of other tropical sandy beaches in northeastern Brazil. The nematofaunal community showed variation in its composition and trophic structure between dry and rainy months, which were not significantly correlated with granulometric characteristics. This suggests that other variables may influence the structure of nematofaunal communities in Gaibu Beach. Further research on the biodiversity of the meiofaunal communities on sandy beaches in northeastern Brazil is urgently needed given the lack of available information of these environments and the extreme stress they are currently under.","PeriodicalId":50702,"journal":{"name":"Ciencias Marinas","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135832431","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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