The state of knowledge regarding rivulids in Bolivia is still limited and has some significant gaps. With the aim of synthesizing and systematizing the available information, which is often scattered, a monographic review is presented that examines the knowledge status of the Rivulidae family and provides an updated inventory of the species present in the country, based on valid records supported by voucher specimens deposited in scientific collections. The presence of 31 species of the Rivulidae family in Bolivian territory is confirmed, distributed across 10 genera and belonging to two subfamilies: Cynolebiinae and Rivulinae. Furthermore, it is validated that 58% (18 species) are endemic to Bolivia, while 25.8% (8 species) have a highly restricted distribution and are recorded only from their type localities. In the context of Bolivia, this work provides a solid foundation for future research and significantly contributes to the knowledge, and therefore the conservation, of this paradigmatic group of fish.
{"title":"Rivulids (Rivulidae: Cyprinodontiformes) of Bolivia: knowledge status and updated inventory","authors":"Heinz Arno Drawert","doi":"10.55565/nhac.zlmk9566","DOIUrl":"https://doi.org/10.55565/nhac.zlmk9566","url":null,"abstract":"The state of knowledge regarding rivulids in Bolivia is still limited and has some significant gaps. With the aim of synthesizing and systematizing the available information, which is often scattered, a monographic review is presented that examines the knowledge status of the Rivulidae family and provides an updated inventory of the species present in the country, based on valid records supported by voucher specimens deposited in scientific collections. The presence of 31 species of the Rivulidae family in Bolivian territory is confirmed, distributed across 10 genera and belonging to two subfamilies: Cynolebiinae and Rivulinae. Furthermore, it is validated that 58% (18 species) are endemic to Bolivia, while 25.8% (8 species) have a highly restricted distribution and are recorded only from their type localities. In the context of Bolivia, this work provides a solid foundation for future research and significantly contributes to the knowledge, and therefore the conservation, of this paradigmatic group of fish.","PeriodicalId":231023,"journal":{"name":"Neotropical Hydrobiology and Aquatic Conservation","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139135637","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}
The fish-habitat relationship was studied in 12 streams from the upper Beni River (La Paz Department, Bolivia) to test if the common species showed habitat preferences and to describe habitat use guilds. Fishes were caught in 181 fishing points of 10 to 20 m2. In each plot water velocity, water depth, and substratum size were estimated. The 41 taxa found in the 12 streams were grouped in four guilds differentiated according to water velocity (Limnophilic, Intermediate-Lentic, Intermediate-Rheophilic and Reophilic). In two guilds, the water depth also differentiated two subgroups. A Canonical Correspondence Analysis showed a significant relationship between fish guilds and the three environmental parameters. The most limnophilic and rheophilic guilds showed a higher dependence on habitat condition. In these mountain streams, the fish community is dominated by rheophilic fishes that represent 75% of the total abundance.
{"title":"Fish habitat use in the Upper Beni mountain streams (Amazon Basin, Bolivia)","authors":"S. Barrera","doi":"10.55565/nhac.ccff5063","DOIUrl":"https://doi.org/10.55565/nhac.ccff5063","url":null,"abstract":"The fish-habitat relationship was studied in 12 streams from the upper Beni River (La Paz Department, Bolivia) to test if the common species showed habitat preferences and to describe habitat use guilds. Fishes were caught in 181 fishing points of 10 to 20 m2. In each plot water velocity, water depth, and substratum size were estimated. The 41 taxa found in the 12 streams were grouped in four guilds differentiated according to water velocity (Limnophilic, Intermediate-Lentic, Intermediate-Rheophilic and Reophilic). In two guilds, the water depth also differentiated two subgroups. A Canonical Correspondence Analysis showed a significant relationship between fish guilds and the three environmental parameters. The most limnophilic and rheophilic guilds showed a higher dependence on habitat condition. In these mountain streams, the fish community is dominated by rheophilic fishes that represent 75% of the total abundance.","PeriodicalId":231023,"journal":{"name":"Neotropical Hydrobiology and Aquatic Conservation","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133972370","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}
Establishment of invasive aquatic species is increasing globally due to factors related to globalization and accelerated trade between regions. Such invasions and subsequent establishment generally cause ecosystem disturbance with occasional local and/or regional socioeconomic impacts. The paiche (tentatively identified as Arapaima gigas), one of the largest fish in the Amazon, was introduced into Bolivia via Peru in the 1960s and has generated significant changes in Amazonian fisheries. In recent years, it has been proposed that the genus Arapaima is composed of different species distributed along the Amazon Basin. The present study evaluated the genetic variability of the paiche in the Bolivian Amazon Basin (sub-basins of the Orthon, Madre de Dios and Beni rivers) using nuclear (nDNA- microsatellites) and mitochondrial (mtDNA NADH and CO1) genetic markers to determine species identity and population structure. Microsatellite DNA analysis suggested that the three populations corresponding to geographic sub-basins are genetically distinct. The genetic distance between populations was not significantly related to the geographic distance between collection sites. We suggest that the founder population in Bolivia was composed of a limited number of individuals that subsequently dispersed in search of environmental conditions similar as those habitats from which they were extracted. Planning for the sustainable use of the species by fisheries should consider the existence of different populations in the Bolivian sub- basins. Recruitment seems to depend on exchanges between nearby surrounding aquatic habitats rather than between sub-basins.
由于全球化和区域间贸易的加速，全球范围内水生入侵物种的建立正在增加。这种入侵和随后的建立通常会造成生态系统干扰，偶尔会对局部和/或区域的社会经济产生影响。巴切鱼(暂定为巨鳉)是亚马逊最大的鱼类之一，于20世纪60年代通过秘鲁引入玻利维亚，并对亚马逊渔业产生了重大影响。近年来，有人提出巨骨舌鱼属是由分布在亚马逊流域的不同物种组成的。本研究利用核(nDNA-微卫星)和线粒体(mtDNA NADH和CO1)遗传标记对玻利维亚亚马逊河流域(Orthon河、Madre de Dios河和Beni河的子流域)的paiche进行了遗传变异评估，以确定物种身份和种群结构。微卫星DNA分析表明，与地理子盆地相对应的3个种群在遗传上是不同的。居群间遗传距离与采集点间地理距离无显著相关。我们认为，玻利维亚的创始种群是由数量有限的个体组成的，后来分散到寻找与他们被提取的栖息地相似的环境条件。渔业可持续利用该物种的规划应考虑到玻利维亚亚盆地中不同种群的存在。招募似乎取决于附近周围水生栖息地之间的交换，而不是子盆地之间的交换。
{"title":"Looking for a home in foreign waters: population genetic structure of the introduced Arapaima in Bolivia","authors":"F. Carvajal-Vallejos","doi":"10.55565/nhac.orkl2245","DOIUrl":"https://doi.org/10.55565/nhac.orkl2245","url":null,"abstract":"Establishment of invasive aquatic species is increasing globally due to factors related to globalization and accelerated trade between regions. Such invasions and subsequent establishment generally cause ecosystem disturbance with occasional local and/or regional socioeconomic impacts. The paiche (tentatively identified as Arapaima gigas), one of the largest fish in the Amazon, was introduced into Bolivia via Peru in the 1960s and has generated significant changes in Amazonian fisheries. In recent years, it has been proposed that the genus Arapaima is composed of different species distributed along the Amazon Basin. The present study evaluated the genetic variability of the paiche in the Bolivian Amazon Basin (sub-basins of the Orthon, Madre de Dios and Beni rivers) using nuclear (nDNA- microsatellites) and mitochondrial (mtDNA NADH and CO1) genetic markers to determine species identity and population structure. Microsatellite DNA analysis suggested that the three populations corresponding to geographic sub-basins are genetically distinct. The genetic distance between populations was not significantly related to the geographic distance between collection sites. We suggest that the founder population in Bolivia was composed of a limited number of individuals that subsequently dispersed in search of environmental conditions similar as those habitats from which they were extracted. Planning for the sustainable use of the species by fisheries should consider the existence of different populations in the Bolivian sub- basins. Recruitment seems to depend on exchanges between nearby surrounding aquatic habitats rather than between sub-basins.","PeriodicalId":231023,"journal":{"name":"Neotropical Hydrobiology and Aquatic Conservation","volume":"182 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122758364","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}
Bolivian Amazon small-scale fisheries traditionally focus on large migratory fish species. However, in the last decade there has been a trend of increased landings of low-value medium-sized migratory species, such as blanquillo, Calophysus macropterus. This scavenger species is captured using chicken and bovine waste as bait, and occasionally carcasses from wild species. This study explores the boom of this specialized fishery in Puerto Villarroel, a small harbor on the Ichilo River, using a combination of historical landing data, fisheries statistics obtained by participatory fisheries monitoring, fish market studies and interviews with local key stakeholders. Additionally, mercury contamination of fish meat was evaluated. Blanquillo fishing started in 2008 and boomed around 2015, representing 30% of landings, after which it decreased to fluctuate around 15%. The capture and landing data suggest that this species is mainly captured by non- organized fishers. The market studies conducted between 2015 and 2018 in Cochabamba city and in lowland middle towns showed that on average more than 20% of consumption of Amazon river fish consisted of blanquillo meat. Mercury is accumulated in the muscle tissue at concentrations near the official limit established by WHO for human consumption, whereas in 15% of fish the concentrations exceeded this limit. The paper pieces together the evolution of the blanquillo fishery in Bolivia, and looks at different aspects, including the diversity of fishers involved, possible impacts on other vulnerable species and public health, and potential impacts and effectiveness of different public policy approaches. In conclusion, the present study shows there is an overall need for more consistent and inclusive fisheries regulations in the Bolivian Amazon, as a way to protect aquatic fauna, avoid environmental contamination and secure human health.
{"title":"Fisheries of the scavenger species Calophysus macropterus: a case study in the Bolivian Amazon","authors":"P. V. Van Damme","doi":"10.55565/nhac.khgu2735","DOIUrl":"https://doi.org/10.55565/nhac.khgu2735","url":null,"abstract":"Bolivian Amazon small-scale fisheries traditionally focus on large migratory fish species. However, in the last decade there has been a trend of increased landings of low-value medium-sized migratory species, such as blanquillo, Calophysus macropterus. This scavenger species is captured using chicken and bovine waste as bait, and occasionally carcasses from wild species. This study explores the boom of this specialized fishery in Puerto Villarroel, a small harbor on the Ichilo River, using a combination of historical landing data, fisheries statistics obtained by participatory fisheries monitoring, fish market studies and interviews with local key stakeholders. Additionally, mercury contamination of fish meat was evaluated. Blanquillo fishing started in 2008 and boomed around 2015, representing 30% of landings, after which it decreased to fluctuate around 15%. The capture and landing data suggest that this species is mainly captured by non- organized fishers. The market studies conducted between 2015 and 2018 in Cochabamba city and in lowland middle towns showed that on average more than 20% of consumption of Amazon river fish consisted of blanquillo meat. Mercury is accumulated in the muscle tissue at concentrations near the official limit established by WHO for human consumption, whereas in 15% of fish the concentrations exceeded this limit. The paper pieces together the evolution of the blanquillo fishery in Bolivia, and looks at different aspects, including the diversity of fishers involved, possible impacts on other vulnerable species and public health, and potential impacts and effectiveness of different public policy approaches. In conclusion, the present study shows there is an overall need for more consistent and inclusive fisheries regulations in the Bolivian Amazon, as a way to protect aquatic fauna, avoid environmental contamination and secure human health.","PeriodicalId":231023,"journal":{"name":"Neotropical Hydrobiology and Aquatic Conservation","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127119014","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}
Three new records of Acanthicus hystrix Agassiz, 1829 are reported for the Ecuadorian Amazon, based on photographs of adult specimens uploaded to the ICTIO database (https://www.ictio.org/) by artisanal fishermen using the ICTIO 3.1 mobile application and a specimen collected in the upper Napo River basin (Ecuador). This specimen is the first voucher deposited in a scientific collection in Ecuador. This report confirms the presence of this cryptic fish species in the Ecuadorian Amazon.
{"title":"Nuevos registros por científicos ciudadanos de Acanthicus hystrix Agassiz, 1829 (Siluriformes: Loricariidae) en la Amazonia ecuatoriana","authors":"Fernando Anaguano Yancha","doi":"10.55565/nhac.rqco6867","DOIUrl":"https://doi.org/10.55565/nhac.rqco6867","url":null,"abstract":"Three new records of Acanthicus hystrix Agassiz, 1829 are reported for the Ecuadorian Amazon, based on photographs of adult specimens uploaded to the ICTIO database (https://www.ictio.org/) by artisanal fishermen using the ICTIO 3.1 mobile application and a specimen collected in the upper Napo River basin (Ecuador). This specimen is the first voucher deposited in a scientific collection in Ecuador. This report confirms the presence of this cryptic fish species in the Ecuadorian Amazon.","PeriodicalId":231023,"journal":{"name":"Neotropical Hydrobiology and Aquatic Conservation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129431797","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}
Las poblaciones del lagarto (Caiman yacare) en el territorio boliviano están siendo aprovechados por los pueblos indígenas de tierras bajas en el marco del Programa Nacional de Conservación y Aprovechamiento Sostenible del Lagarto. Al inicio del Programa, el lagarto fue aprovechado por su piel y, luego de la caída del mercado del cuero, por su carne, beneficiando a numerosas comunidades de las Tierras Comunitarias de Origen de los departamentos del Beni, Santa Cruz y La Paz. En el marco de la actualización de los planes de manejo del lagarto, se evaluaron las poblaciones post-cosecha, y también las del caimán negro (Melanosuchus niger) y del cocodrilo (Paleosuchus palpebrosus). Son especies simpátricas en los ecosistemas acuáticos de las áreas de uso tradicional de recursos en nueve Tierras Comunitarias de Origen en el departamento del Beni. Para evaluar las poblaciones de caimanes, se utilizó el método Detección Visual Nocturna o conteo nocturno en cinco tipos de ambientes acuáticos (lagunas tectónicas, lagunas meándricas, lagunetas, ríos y arroyos). Se evaluaron aproximadamente 1 507 km de orilla de ambientes acuáticos y se contabilizaron 53 551 lagartos (94.64%), 3 019 caimanes negros (5.33%) y 15 cocodrilos (0.03%). La abundancia relativa del lagarto muestra grandes variaciones de un cuerpo de agua a otro y en muchos de ellos el lagarto comparte espacio con el caimán negro. En general, las estructuras poblacionales están dominadas por ejemplares juveniles (clase II), como es lo típicamente observado en poblaciones sometidas a cosecha comercial. Basado en el análisis de los datos presentados se concluye que las poblaciones del lagarto en el área de estudio tienen potencial para ser aprovechadas sosteniblemente. Un conjunto de factores externos, como son la demanda en mercados y el precio de compra, puede influenciar en la decisión de efectivamente realizar el aprovechamiento.
在国家蜥蜴保护和可持续利用计划的框架内，低地土著人民正在开发玻利维亚境内的凯门鳄种群。在项目开始时，蜥蜴被用来获取皮毛，在皮革市场崩溃后，蜥蜴被用来获取肉，使贝尼省、圣克鲁斯省和拉巴斯省的许多社区受益。在2008年至2009年期间，在哥斯达黎加的加拉帕戈斯国家公园(parque national de加拉帕戈斯国家公园(parque national de加拉帕戈斯国家公园))和哥斯达黎加的加拉帕戈斯国家公园(parque national de加拉帕戈斯国家公园(parque national de加拉帕戈斯国家公园))进行了研究。它们是贝尼省9个原始社区土地上传统资源利用地区水生生态系统的同群物种。为了评估凯门鳄的数量，采用了夜间视觉探测或夜间计数的方法，在五种水生环境(构造泻湖、米纳德泻湖、泻湖、河流和溪流)中进行了研究。我们评估了大约1507公里的水生环境海岸，包括53 551只蜥蜴(94.64%)、3 019只黑短吻鳄(5.33%)和15只鳄鱼(0.03%)。蜥蜴的相对丰度因水域而异，在许多水域中，蜥蜴与黑凯门鳄共享空间。一般来说，种群结构由幼鱼(II类)主导，这在商业收获的种群中是典型的。在本研究中，我们分析了该地区蜥蜴种群的分布情况，并确定了该地区蜥蜴种群的分布情况。一组外部因素，如市场需求和购买价格，可能会影响有效开发的决定。
{"title":"Estado poblacional de caimanes (Alligatoridae) en nueve Tierras Comunitarias de Origen del Beni, Bolivia","authors":"Luis Rolando Rivas","doi":"10.55565/nhac.iouf3417","DOIUrl":"https://doi.org/10.55565/nhac.iouf3417","url":null,"abstract":"Las poblaciones del lagarto (Caiman yacare) en el territorio boliviano están siendo aprovechados por los pueblos indígenas de tierras bajas en el marco del Programa Nacional de Conservación y Aprovechamiento Sostenible del Lagarto. Al inicio del Programa, el lagarto fue aprovechado por su piel y, luego de la caída del mercado del cuero, por su carne, beneficiando a numerosas comunidades de las Tierras Comunitarias de Origen de los departamentos del Beni, Santa Cruz y La Paz. En el marco de la actualización de los planes de manejo del lagarto, se evaluaron las poblaciones post-cosecha, y también las del caimán negro (Melanosuchus niger) y del cocodrilo (Paleosuchus palpebrosus). Son especies simpátricas en los ecosistemas acuáticos de las áreas de uso tradicional de recursos en nueve Tierras Comunitarias de Origen en el departamento del Beni. Para evaluar las poblaciones de caimanes, se utilizó el método Detección Visual Nocturna o conteo nocturno en cinco tipos de ambientes acuáticos (lagunas tectónicas, lagunas meándricas, lagunetas, ríos y arroyos). Se evaluaron aproximadamente 1 507 km de orilla de ambientes acuáticos y se contabilizaron 53 551 lagartos (94.64%), 3 019 caimanes negros (5.33%) y 15 cocodrilos (0.03%). La abundancia relativa del lagarto muestra grandes variaciones de un cuerpo de agua a otro y en muchos de ellos el lagarto comparte espacio con el caimán negro. En general, las estructuras poblacionales están dominadas por ejemplares juveniles (clase II), como es lo típicamente observado en poblaciones sometidas a cosecha comercial. Basado en el análisis de los datos presentados se concluye que las poblaciones del lagarto en el área de estudio tienen potencial para ser aprovechadas sosteniblemente. Un conjunto de factores externos, como son la demanda en mercados y el precio de compra, puede influenciar en la decisión de efectivamente realizar el aprovechamiento.","PeriodicalId":231023,"journal":{"name":"Neotropical Hydrobiology and Aquatic Conservation","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133962792","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}
We determined the nutritional quality of yacare meat (Caiman yacare) in the Beni river basin. Commercial cut samples were obtained from the tails of four males harvested as part of a management plan implemented in the Tacana Indigenous Territory. This plan guarantees long-term sustainability of caiman hunting. pH analysis, the Eber test, and the ammoniacal nitrogen test suggest that the meat was of good quality, processed properly, and free of contamination. Nutritional analyses suggest that yacare meat is a healthy alternative for human consumption, as it has a high protein value (23.02 g/100g) and low fat concentration (0.67g/100g). Yacare meat has a high concentration of minerals such as phosphorus (227.53 g) and calcium (11.84 g), both beneficial for memory and cardiovascular health. Caiman meat can be considered as a valuable nutritional supplement in human diets both in urban and rural areas
{"title":"Nutritional properties of spectacled caiman (Caiman yacare) meat marketed as part of a wildlife management strategy in the Beni river basin","authors":"Alvarez Guido","doi":"10.55565/nhac.yibr9149","DOIUrl":"https://doi.org/10.55565/nhac.yibr9149","url":null,"abstract":"We determined the nutritional quality of yacare meat (Caiman yacare) in the Beni river basin. Commercial cut samples were obtained from the tails of four males harvested as part of a management plan implemented in the Tacana Indigenous Territory. This plan guarantees long-term sustainability of caiman hunting. pH analysis, the Eber test, and the ammoniacal nitrogen test suggest that the meat was of good quality, processed properly, and free of contamination. Nutritional analyses suggest that yacare meat is a healthy alternative for human consumption, as it has a high protein value (23.02 g/100g) and low fat concentration (0.67g/100g). Yacare meat has a high concentration of minerals such as phosphorus (227.53 g) and calcium (11.84 g), both beneficial for memory and cardiovascular health. Caiman meat can be considered as a valuable nutritional supplement in human diets both in urban and rural areas","PeriodicalId":231023,"journal":{"name":"Neotropical Hydrobiology and Aquatic Conservation","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116426377","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}
Se presenta el primer inventario de la Ictiofauna para el río Iruyañez (Llanos de Moxos, cuenca del río Mamoré). Se realizaron colectas en tres puntos utilizando distintos métodos de pesca. Se colectaron un total de 1 953 ejemplares, pertenecientes a 108 especies de peces distribuidas en seis órdenes, 23 familias y 79 géneros. Se reportan tres nuevas especies para Bolivia, además de la ampliación de la distribución de la especie invasora Semaprochilodus insignis en la cuenca del río Mamoré.
本文介绍了iruyanez河(Llanos de Moxos, mamre河流域)鱼类种群的第一份清单。在三个地点使用不同的捕鱼方法进行取样。本研究的目的是确定在墨西哥南部沿海地区发现的两种鱼类的分布情况。此外，在mamore河流域，入侵物种Semaprochilodus insignis的分布也有所扩大。
{"title":"Ictiofauna del río Iruyañez, cuenca del río Mamore, Amazonía Boliviana","authors":"Reinaldo Cholima","doi":"10.55565/nhac.rlgl3979","DOIUrl":"https://doi.org/10.55565/nhac.rlgl3979","url":null,"abstract":"Se presenta el primer inventario de la Ictiofauna para el río Iruyañez (Llanos de Moxos, cuenca del río Mamoré). Se realizaron colectas en tres puntos utilizando distintos métodos de pesca. Se colectaron un total de 1 953 ejemplares, pertenecientes a 108 especies de peces distribuidas en seis órdenes, 23 familias y 79 géneros. Se reportan tres nuevas especies para Bolivia, además de la ampliación de la distribución de la especie invasora Semaprochilodus insignis en la cuenca del río Mamoré.","PeriodicalId":231023,"journal":{"name":"Neotropical Hydrobiology and Aquatic Conservation","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128448196","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}
The objective of this study was to characterize the conchyliometry of the invasive gastropod Melanoides tuberculata collected in the Praquiquara stream (Castanhal, Pará, Brazil), comparing it with the morphological characteristics of the shell of specimens from the Banana Lagoon (Caucaia, Ceará, Brazil). The external morphometric measurements (length
{"title":"Conquiliometría del gasterópodo Melanoides tuberculata (Müller, 1774) (Gastropoda, Thiaridae) en la costa Norte-Noreste de Brasil","authors":"Weverton John Pinheiro dos Santos","doi":"10.55565/nhac.gijw7517","DOIUrl":"https://doi.org/10.55565/nhac.gijw7517","url":null,"abstract":"The objective of this study was to characterize the conchyliometry of the invasive gastropod Melanoides tuberculata collected in the Praquiquara stream (Castanhal, Pará, Brazil), comparing it with the morphological characteristics of the shell of specimens from the Banana Lagoon (Caucaia, Ceará, Brazil). The external morphometric measurements (length","PeriodicalId":231023,"journal":{"name":"Neotropical Hydrobiology and Aquatic Conservation","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122656092","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}
This study presents the results of a compilation of the existing fish records for the Madidi National Park and Natural Area for Integrated Management (PNANMI Madidi), as well as extensive ichthyological sampling by the Identidad Madidi expedition, and species identified in ichthyoplankton by the metabarcoding approach. The current list has a total of 333 species for the protected area, across 43 families and within 13 orders. The list also includes 35 new candidate species still to be described. The highest number of species is found within the order Characiformes (139 species; 41.7%), followed by Siluriformes (137 species; 41.1%), and Cichliformes (19 species; 5.7%), which together represent 88.6% of total species richness. The remaining species (11.4%) are distributed across another 10 orders. The families with the highest number of species are Characidae (73 species; 21.9%), Loricariidae (36; 10.8%), Heptapteridae (21; 6.3%), Pimelodidae (21; 6.3%), and Cichlidae (19; 5.7%). The list of 333 species presented here doubles the previously known ichthyofauna (161 species) in the PNANMI Madidi. The area covers 1.3% of the Madeira basin, but conserves 25% of the
{"title":"Ichthyofauna of the megadiverse Madidi National Park in the Bolivian Andean Amazon","authors":"G. Miranda-Chumacero","doi":"10.55565/nhac.gcja3363","DOIUrl":"https://doi.org/10.55565/nhac.gcja3363","url":null,"abstract":"This study presents the results of a compilation of the existing fish records for the Madidi National Park and Natural Area for Integrated Management (PNANMI Madidi), as well as extensive ichthyological sampling by the Identidad Madidi expedition, and species identified in ichthyoplankton by the metabarcoding approach. The current list has a total of 333 species for the protected area, across 43 families and within 13 orders. The list also includes 35 new candidate species still to be described. The highest number of species is found within the order Characiformes (139 species; 41.7%), followed by Siluriformes (137 species; 41.1%), and Cichliformes (19 species; 5.7%), which together represent 88.6% of total species richness. The remaining species (11.4%) are distributed across another 10 orders. The families with the highest number of species are Characidae (73 species; 21.9%), Loricariidae (36; 10.8%), Heptapteridae (21; 6.3%), Pimelodidae (21; 6.3%), and Cichlidae (19; 5.7%). The list of 333 species presented here doubles the previously known ichthyofauna (161 species) in the PNANMI Madidi. The area covers 1.3% of the Madeira basin, but conserves 25% of the","PeriodicalId":231023,"journal":{"name":"Neotropical Hydrobiology and Aquatic Conservation","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116905015","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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