Acta Amazonica最新文献_第2页

Environmental filters explain the ecomorphological patterns of stream fish in the southern Amazon 环境过滤器解释了亚马逊南部河流鱼类的生态形态模式

4区环境科学与生态学

Acta Amazonica Pub Date : 2023-09-01 DOI: 10.1590/1809-4392202203192

Lidia Brasil SEABRA, Giovanni Sampaio PALHETA, Naraiana Loureiro BENONE, Bruno AYRES SANTOS, Luciano Fogaça de Assis MONTAG

{"title":"Environmental filters explain the ecomorphological patterns of stream fish in the southern Amazon","authors":"Lidia Brasil SEABRA, Giovanni Sampaio PALHETA, Naraiana Loureiro BENONE, Bruno AYRES SANTOS, Luciano Fogaça de Assis MONTAG","doi":"10.1590/1809-4392202203192","DOIUrl":"https://doi.org/10.1590/1809-4392202203192","url":null,"abstract":"ABSTRACT The ecomorphology reflects morphological variations that may indicate significant ecological processes. In this study, the influence of environmental variables on the ecomorphological composition of stream fish was tested. The study was developed in ten streams within a conservation area in the Juruena River sub-basin, in Mato Grosso state, Brazil. The sampling occurred during the drought period in July 2012. The fish were sampled with simple sieves and trawl nets. We analyzed 17 variables of the physical habitat and 14 morphological indices based on morphometric measurements of the fish. In total, 753 specimens were collected, comprising four orders, 14 families, and 27 species. Only fine sediments influenced the ecomorphological composition of the fish assemblages. This substrate variable acted as a filter for the ecomorphology of fish that usually inhabit slow waters, have a morphology adapted towards a good stabilization capacity and maneuverability, fins capable of large and rapid impulses, and that feed close to the surface. Our results can contribute to the understanding of the ecological processes that drive the composition of fish assemblages in conserved Amazonian streams.","PeriodicalId":51309,"journal":{"name":"Acta Amazonica","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135685992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Taxonomic synopsis of Caryomene (Menispermaceae) in the Brazilian Amazon 标题巴西亚马孙河流域石竹属植物的分类概述

4区环境科学与生态学

Acta Amazonica Pub Date : 2023-09-01 DOI: 10.1590/1809-4392202203300

Julio dos Santos de SOUSA, Ely Simone Cajueiro GURGEL

引用次数: 0

Effect of feeding frequency and water salinization on early development of Pyrrhulina brevis, an Amazonian ornamental fish 投食频率和海水盐碱化对亚马逊河观赏鱼短红唇鱼早期发育的影响

IF 0.8 4区环境科学与生态学

Acta Amazonica Pub Date : 2023-06-01 DOI: 10.1590/1809-4392202200602

Arlindo dos S. PINHEIRO JUNIOR, L. D. Oliveira, Bruno Eiras, W. D. S. Lima, G. C. Veras, L. B. D. Moura, A. L. Salaro, D. A. Campelo

{"title":"Effect of feeding frequency and water salinization on early development of Pyrrhulina brevis, an Amazonian ornamental fish","authors":"Arlindo dos S. PINHEIRO JUNIOR, L. D. Oliveira, Bruno Eiras, W. D. S. Lima, G. C. Veras, L. B. D. Moura, A. L. Salaro, D. A. Campelo","doi":"10.1590/1809-4392202200602","DOIUrl":"https://doi.org/10.1590/1809-4392202200602","url":null,"abstract":"ABSTRACT Pyrrhulina brevis is an endemic fish from the Amazon basin that is valued in the ornamental fish market. In larviculture, fish are very sensitive to stressors and have a high mortality rate. Salinized water may provide more energy to overcome stress and feeding frequency is an important strategy to improve productive performance. Therefore, the aim of this study was to evaluate the best feeding frequency and the best level of water salinization for larval development of P. brevis. A total of 360 post-larvae of P. brevis (5.26 ± 1.65 mg, 5.57 ± 0.68 mm) were randomly distributed in 36 aquariums (1 L) in a 3x4 factorial scheme, to evaluate three concentrations of salt in water (0, 1 and 2 g L-1) and four feeding frequencies (once, twice, three and four times a day). We offered 150 Artemia nauplii per day and per post-larvae during 15 days. The fish kept at 1 g L-1 salinized water, and those fed 3 and 4 times a day presented significantly greater final length and weight, weight gain, and specific growth rate for length and weight. An interaction between salinized water and feeding frequency was observed for survival rate. We conclude that, during the initial rearing phase of P. brevis, feeding frequency of three times a day and salinized water at 1 g L-1 is recommended.","PeriodicalId":51309,"journal":{"name":"Acta Amazonica","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48969156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Regional climate modeling in the Amazon basin to evaluate fire risk 亚马逊流域区域气候模型评估火灾风险

IF 0.8 4区环境科学与生态学

Acta Amazonica Pub Date : 2023-06-01 DOI: 10.1590/1809-4392202201881

Josivaldo Silva, V. Capistrano, J. Veiga, A. Brito

{"title":"Regional climate modeling in the Amazon basin to evaluate fire risk","authors":"Josivaldo Silva, V. Capistrano, J. Veiga, A. Brito","doi":"10.1590/1809-4392202201881","DOIUrl":"https://doi.org/10.1590/1809-4392202201881","url":null,"abstract":"ABSTRACT Studies regarding deforestation, the hydrological cycle, climate change and fire weather can benefit from the detailed simulations provided by regional climate models (RCM). While much attention has been given to fire activity in the Amazon, few studies have used RCM runs to assess fire risk and variables associated to fire occurrence. We evaluated precipitation, temperature and a fire risk index from the ensemble of Eta model simulations coupled with three different global climate models for the Amazon basin. The RCM runs were compared to reanalysis data for the dry season from 1979 to 2005. The maximum and 2-m temperature fields were underestimated over the entire region, but showed a statistically significant spatial correlation with the reference data. Precipitation was overestimated over the Amazon, in accordance with the major sources of moisture analyzed. The Keetch-Byram drought index (KBDI) was not significantly affected by the bias found in temperature and precipitation, and the ensemble improved relative to the individual member simulations. KBDI estimations performed better with the ensemble of the three evaluated members, however the Eta model showed some limitations. The validation of modeled fire risk could benefit from the use of satellite hotspot data. Furthermore, the KBDI can also be used in the assessment of how climate change interacts with fire activity in the Amazon region.","PeriodicalId":51309,"journal":{"name":"Acta Amazonica","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42167915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Low fertilization optimizes the water use efficiency of an Amazonian canga grass for mineland rehabilitation 低施肥优化了亚马逊canga草的水利用效率，用于矿山修复

IF 0.8 4区环境科学与生态学

Acta Amazonica Pub Date : 2023-06-01 DOI: 10.1590/1809-4392202202351

D. Boanares, B. R. S. Silva, Markus Gastauer, S. Ramos, C. Caldeira

{"title":"Low fertilization optimizes the water use efficiency of an Amazonian canga grass for mineland rehabilitation","authors":"D. Boanares, B. R. S. Silva, Markus Gastauer, S. Ramos, C. Caldeira","doi":"10.1590/1809-4392202202351","DOIUrl":"https://doi.org/10.1590/1809-4392202202351","url":null,"abstract":"ABSTRACT The peculiar characteristics of mining waste substrates represent a significant challenge for environmental rehabilitation. Here, we evaluated the revegetation potential of Paspalum cinerascens on substrates from mining areas of Serra dos Carajás, a region harboring a large mine complex in the eastern Brazilian Amazon. Paspalum cinerascens is a native grass widely distributed in the canga ecosystem, a vegetation type covering iron ore reserves. Seeds of P. cinerascens harvested in canga were germinated in sterilized quartzite sand and the seedlings grown in controlled conditions for 90 days. The seedlings were then cultivated in canga topsoil (control, without fertilization) and mining waste substrate with half and complete fertilization currently applied at the beginning of mineland rehabilitation in Serra dos Carajás. Regardless of fertilization, plants grown in the mining waste substrate did not differ in carbon assimilation, tillering rate and root biomass, despite higher leaf nutrient content and lower root: shoot ratio when compared to plants in canga topsoil. Compared to the control, complete fertilization led to significantly taller plants, higher shoot biomass and reduced water use efficiency. Half fertilization led to higher phosphorus and water use efficiency and stomatal density. Our results confirmed that P. cinerascens has adaptive traits to grow and thrive in the harsh environmental conditions of post iron ore mining, and can be used in rehabilitation processes. Moreover, half fertilization led to plants with optimized water loss in exchange for carbon without significant costs to plant growth, an interesting trait for rehabilitation in areas experiencing water restrictions.","PeriodicalId":51309,"journal":{"name":"Acta Amazonica","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49368054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ribosomal, mitochondrial and bacterial (Wolbachia) reference sequences for Dipetalonema gracile obtained from a wild pied tamarin (Saguinus bicolor) host in Manaus, Brazil 从巴西马瑙斯的野生斑毛猴(Saguinus bicolor)宿主中获得了细细双毛猴的核糖体、线粒体和细菌(沃尔巴克氏体)参考序列

IF 0.8 4区环境科学与生态学

Acta Amazonica Pub Date : 2023-06-01 DOI: 10.1590/1809-4392202201741

Carlos Henrique Aguiar Costa, J. Crainey, A. Vicente, D. F. Conga, M. Gordo, S. Luz, Cindy Alves Dias, Túllio Romão Ribeiro da Silva, Caroline Coelho Ferreira, A. Nava

{"title":"Ribosomal, mitochondrial and bacterial (Wolbachia) reference sequences for Dipetalonema gracile obtained from a wild pied tamarin (Saguinus bicolor) host in Manaus, Brazil","authors":"Carlos Henrique Aguiar Costa, J. Crainey, A. Vicente, D. F. Conga, M. Gordo, S. Luz, Cindy Alves Dias, Túllio Romão Ribeiro da Silva, Caroline Coelho Ferreira, A. Nava","doi":"10.1590/1809-4392202201741","DOIUrl":"https://doi.org/10.1590/1809-4392202201741","url":null,"abstract":"ABSTRACT The primates that inhabit the rainforest surrounding the city of Manaus (Amazonas, Brazil) have long been recognised as potentially important reservoirs of emerging and re-emerging infectious diseases (ERIDs). PCR amplification of filarial sequences from wild-caught Simulium oyapockense has been used to incriminate potentially important Amazon-region ERID bridge vectors by showing they had previously fed on non-human primates. The broader use of filarial parasite sequences for the incrimination of biting insects as potentially important zoonotic disease vectors is limited by a paucity of primate-derived filarial parasite reference sequences which can be matched to the PCR amplified sequences obtained from insect-vector vectors. Here we have used shotgun sequencing to obtain reference data from an adult Dipetalonema gracile parasite which was found infecting a wild pied tamarin (Saguinus bicolor) in a peripheral region of Manaus. We report the parasite´s complete mitochondrial genome (which is 13,647 base pairs in length), 894,846 base pairs of its Wolbachia genome and 6,426 base pairs of its ribosomal DNA locus (spanning from the start of its 18S subunit to the end of its 28S subunit). Despite being critically endangered, S. bicolor is commonly encountered around the periphery of Manaus and in urban forest fragments. The reported sequences may be a useful reference tool for identifying ERID bridge vectors and potentially provide some insights into the amount and the nature of contact between primate pathogen reservoirs and the residents of Manaus.","PeriodicalId":51309,"journal":{"name":"Acta Amazonica","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42681145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Indigenous ecological calendars and seasonal vector-borne diseases in the Colombian Amazon: an intercultural and interdisciplinary approach 哥伦比亚亚马逊地区土著生态日历和季节性病媒传播疾病:跨文化和跨学科方法

IF 0.8 4区环境科学与生态学

Acta Amazonica Pub Date : 2023-06-01 DOI: 10.1590/1809-4392202200910

Andrés D. Jiménez, Christian Andrés CÁRDENAS CARRILLO, Alejandro ARIZA TELLO, J. A. Echeverri, Angie D. González, H. R. Gutiérrez, N. Matta, Tomás Hernando ROJAS TAFUR, David ROMÁN TIQUIDIMAS, Camila Sofía Venegas, Consuelo DE VENGOECHEA

{"title":"Indigenous ecological calendars and seasonal vector-borne diseases in the Colombian Amazon: an intercultural and interdisciplinary approach","authors":"Andrés D. Jiménez, Christian Andrés CÁRDENAS CARRILLO, Alejandro ARIZA TELLO, J. A. Echeverri, Angie D. González, H. R. Gutiérrez, N. Matta, Tomás Hernando ROJAS TAFUR, David ROMÁN TIQUIDIMAS, Camila Sofía Venegas, Consuelo DE VENGOECHEA","doi":"10.1590/1809-4392202200910","DOIUrl":"https://doi.org/10.1590/1809-4392202200910","url":null,"abstract":"ABSTRACT Traditional ecological knowledge of indigenous groups in the southeastern Colombian Amazon coincides in identifying the two main hydrological transition periods (wet-dry: August-November; dry-wet: March-April) as those with greater susceptibility to disease in humans. Here we analyze the association between indigenous knowledge about these two periods and the incidence of two vector-borne diseases: malaria and dengue. We researched seven “ecological calendars” from three regions in the Colombian Amazon, malaria and dengue cases reported from 2007 to 2019 by the Colombian National Institute of Health, and daily temperature and precipitation data from eight meteorological stations in the region from 1990-2019 (a climatological normal). Malaria and dengue follow a seasonal pattern: malaria has a peak from August to November, corresponding with the wet-dry transition (the “season of the worms” in the indigenous calendars), and dengue has a peak in March and April, coinciding with the dry-wet transition. Previous studies have shown a positive correlation between rainfall and dengue and a negative correlation between rainfall and malaria. However, as the indigenous ecological knowledge codified in the calendars suggests, disease prediction cannot be reduced to a linear correlation with a single environmental variable. Our data show that two major aspects of the indigenous calendars (the time of friaje as a critical marker of the year and the hydrological transition periods as periods of greater susceptibility to diseases) are supported by meteorological data and by the available information about the incidence of malaria and dengue.","PeriodicalId":51309,"journal":{"name":"Acta Amazonica","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43845454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anti-herpes activity of the total alkaloid fraction from the branches of Fusaea longifolia (Annonaceae) 长叶镰刀枝总生物碱部位的抗疱疹活性研究

IF 0.8 4区环境科学与生态学

Acta Amazonica Pub Date : 2023-06-01 DOI: 10.1590/1809-4392202201421

S. H. A. Dourado, Cristiangela Silva Santos, Vinicius de Souza Ferreira, A. F. PONTES-PIRES, D. M. S. Valladão, E. B. Ribeiro, C. A. Souza, Felipe M. A. Silva, E. Costa, C. R. Andrighetti

{"title":"Anti-herpes activity of the total alkaloid fraction from the branches of Fusaea longifolia (Annonaceae)","authors":"S. H. A. Dourado, Cristiangela Silva Santos, Vinicius de Souza Ferreira, A. F. PONTES-PIRES, D. M. S. Valladão, E. B. Ribeiro, C. A. Souza, Felipe M. A. Silva, E. Costa, C. R. Andrighetti","doi":"10.1590/1809-4392202201421","DOIUrl":"https://doi.org/10.1590/1809-4392202201421","url":null,"abstract":"ABSTRACT The herpes simplex virus type 1 (HSV-1) and type 2 (HSV-2) occur worldwide. Infections caused by these viruses have great public health importance due to the growing resistance to the first-choice drug, acyclovir, especially in immunosuppressed patients. Alkaloids derived from species of Annonaceae have been reported as antiviral agents against HSV and others viruses. Within this context, we evaluated the antiviral activity of the total alkaloid fraction (TAF) extracted from the branches of Fusaea longifolia (Aubl.) Saff. (Annonaceae), a species native to the Amazon region, against the HSV-1 and HSV-2 viruses. The antiviral activity was evaluated through the plate reduction assay and the mode of action was investigated by a set of other assays. The TAF was active against the HSV-2 strain 333 and against the HSV-1 strains KOS and 29R (acyclovir resistant), with selectivity index values (SI = 50% cytotoxic concentration/50% effective concentration) of 5, 4 and 3, respectively. In the preliminary study of the anti-HSV-2 mode of action, TAF showed viral inhibitory effects if added up to 12 h post-infection, had virucidal activity and did not present viral inhibition in pre-treatment. Our results showed that the TAF exhibited anti-HSV activity. Regarding HSV-2, TAF acted after the viral infection and had virucidal activity. A mass spectrometry analysis revealed the presence of nine alkaloids in the TAF that had previously been reported for Annonaceae, including liriodenine, lysicamine and isoboldine, which have been described as potential anti-HSV-1 agents.","PeriodicalId":51309,"journal":{"name":"Acta Amazonica","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46129041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

HERBase: A collection of understorey herb vegetation plots from Amazonia HERBase：亚马逊地区的下层草本植物群落

IF 0.8 4区环境科学与生态学

Acta Amazonica Pub Date : 2023-06-01 DOI: 10.1590/1809-4392202203150

T. André, G. Moulatlet, T. Almeida, Paula Alverga, C. R. Boelter, D. Drucker, Julia Gomes da Silva, R. Linares‐Palomino, M. Lopes, José Leonardo Lima Magalhães, Â. G. Manzatto, H. A. Mews, Iracema Elizabeth de Siuza Moll, A. Mortati, Eliana Paixão, Estela Quintero-Vallejo, Tinde van Andel, M. Silveira, D. Storck-Tonon, H. Tuomisto, G. Zuquim, F. Costa

{"title":"HERBase: A collection of understorey herb vegetation plots from Amazonia","authors":"T. André, G. Moulatlet, T. Almeida, Paula Alverga, C. R. Boelter, D. Drucker, Julia Gomes da Silva, R. Linares‐Palomino, M. Lopes, José Leonardo Lima Magalhães, Â. G. Manzatto, H. A. Mews, Iracema Elizabeth de Siuza Moll, A. Mortati, Eliana Paixão, Estela Quintero-Vallejo, Tinde van Andel, M. Silveira, D. Storck-Tonon, H. Tuomisto, G. Zuquim, F. Costa","doi":"10.1590/1809-4392202203150","DOIUrl":"https://doi.org/10.1590/1809-4392202203150","url":null,"abstract":"ABSTRACT Understorey herbs form a diverse and understudied plant assemblage in tropical forests. Although several studies and research teams have long been dedicated to the study of this conspicuous vegetation component in Amazonia, no effort to unify the data has been undertaken to date. In contrast to trees and other life forms for which major data compilations already exist, a unified database dedicated to herbs is still lacking. Part of the problem is in defining what is a herb and how to effectively sample herb assemblages. In this article, we describe the database HERBase, an exhaustive compilation of published and unpublished data on herb inventories in Amazonia. We also describe the structure, functioning, and guidelines for data curation and integration in HERBase. We were able to compile information from 1381 plots from all six Amazonian geographic regions. Based on this dataset, we describe and discuss sampling and knowledge gaps, priority areas for new collections, and recommend sampling protocols to facilitate data integration in the future. This novel database provides a unique biodiversity data repository on understorey herbs that will enable new studies on community ecology and biogeography.","PeriodicalId":51309,"journal":{"name":"Acta Amazonica","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46199604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The bycatch of piramutaba, Brachyplatystoma vaillantii industrial fishing in a salinity and depth gradient in the Amazon estuary, Brazil 巴西亚马逊河口盐度和深度梯度下工业捕鱼的副渔获物

IF 0.8 4区环境科学与生态学

Acta Amazonica Pub Date : 2023-06-01 DOI: 10.1590/1809-4392202200342

A. Marceniuk, B. Soares, M. Rotundo, R. Caires, R. Rosa, Wagner Santos, Ana Patrícia Barros Cordeiro, João Gomes ROMÃO JUNIOR, A. Akama, W. B. Wosiacki, Alex Klautau, I. Cintra, R. Barthem

{"title":"The bycatch of piramutaba, Brachyplatystoma vaillantii industrial fishing in a salinity and depth gradient in the Amazon estuary, Brazil","authors":"A. Marceniuk, B. Soares, M. Rotundo, R. Caires, R. Rosa, Wagner Santos, Ana Patrícia Barros Cordeiro, João Gomes ROMÃO JUNIOR, A. Akama, W. B. Wosiacki, Alex Klautau, I. Cintra, R. Barthem","doi":"10.1590/1809-4392202200342","DOIUrl":"https://doi.org/10.1590/1809-4392202200342","url":null,"abstract":"ABSTRACT The piramutaba, Brachyplatystoma vaillantii is a freshwater catfish that is the most abundant fishery resource in the Amazon estuary. Piramutaba trawling is done on industrial fishing scale and is characterized by the presence of many freshwater and marine bycatch species, with and without commercial value. Here we describe the bycatch of the industrial fishery of piramutaba in the Amazon estuary and evaluate the relationship of two important environmental factors, depth and salinity, with the accidental capture of freshwater and marine fishes in the Amazon estuary in the rainy and dry seasons. We identified 21 cartilaginous fish species (19.1% freshwater and 80.9% marine) and 125 bony fish species (25.6% freshwater and 74.4% marine). The bycatch included 64 species without commercial value (43% of all bycatch species), which are always discarded. Freshwater and estuarine fishes exhibited significantly higher abundances in shallower environments, while marine fishes were similarly abundant along the entire depth gradient. On the contrary, the abundance of freshwater fishes significantly decreased, and that of estuarine and marine fishes significantly increased with increasing salinity. Regarding the conservation status of the bycatch species, one is classified as vulnerable (VU), and seven as critically endangered (CR). The information on the bycatch of piramutaba fishery in the Amazon estuary is important to subsidize regional fisheries policies and the management of protected areas.","PeriodicalId":51309,"journal":{"name":"Acta Amazonica","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47870953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0