Neotropical Ichthyology最新文献_第10页

A new species of the seasonal killifish genus Moema (Cyprinodontiformes: Rivulidae) from the Piraí watershed in the Southwest Amazon basin 亚马逊西南部Piraí流域季节鳉鱼属一新种(鲤形目:鲤科)

IF 1.7 4区生物学

Neotropical Ichthyology Pub Date : 2022-01-01 DOI: 10.1590/1982-0224-2022-0067

Heinz Arno Drawert

引用次数: 2

Life history trait variations and population dynamics of Calophysus macropterus (Siluriformes: Pimelodidae) in two river systems of the Colombian and Peruvian Amazon 哥伦比亚和秘鲁亚马逊河流域两个水系中大翅螯虾的生活史、性状变异和种群动态

IF 1.7 4区生物学

Neotropical Ichthyology Pub Date : 2022-01-01 DOI: 10.1590/1982-0224-2021-0082

César A. Bonilla-Castillo, A. G. Vasquez, Edwin Agudelo Córdoba, G. G. Hurtado, Gladys Vargas, F. Duponchelle

{"title":"Life history trait variations and population dynamics of Calophysus macropterus (Siluriformes: Pimelodidae) in two river systems of the Colombian and Peruvian Amazon","authors":"César A. Bonilla-Castillo, A. G. Vasquez, Edwin Agudelo Córdoba, G. G. Hurtado, Gladys Vargas, F. Duponchelle","doi":"10.1590/1982-0224-2021-0082","DOIUrl":"https://doi.org/10.1590/1982-0224-2021-0082","url":null,"abstract":"ABSTRACT The catfish Calophysus macropterus is heavily exploited in the Amazon basin, yet its life history characteristics are poorly documented, hampering proper fisheries management. In order to fill this gap, monthly sampling in the upper Putumayo River and in the Amazonas, lower Marañón and Ucayali (AMU) rivers were carried out over several years (2013-2015 in the AMU, 2013-2017 in the Putumayo) to provide detailed information about its reproduction, growth and mortality patterns (using length frequency data). Reproduction, which occurs during the dry and early flooding season, was only observed in the upper Putumayo River and not in the sampled portion of the AMU system, suggesting that the species reproduces closer to the Andes than other pimelodid catfishes. Size at first sexual maturity did not differ significantly among sex or among river systems, ranging from 25-28 cm SL. In both river systems, females had a faster growth than males and both genders also tended to have a better growth in the AMU than in the upper Putumayo. Mortality and exploitation estimate all indicated overexploitation of the species in both river systems. The implications of these results for fisheries management and conservation are discussed.","PeriodicalId":19103,"journal":{"name":"Neotropical Ichthyology","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67198796","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}

引用次数: 1

Estimated richness and environmental correlates of miniature fish assemblages in the rio Jacundá, Brazil 巴西jacundun地区里约热内卢微型鱼类群落的丰富度和环境相关性

IF 1.7 4区生物学

Neotropical Ichthyology Pub Date : 2022-01-01 DOI: 10.1590/1982-0224-2021-0051

J. Perkin, C. Montaña, Esteban J. Nogueira, Bianca B. Brandão, G. Mattox, K. Conway

{"title":"Estimated richness and environmental correlates of miniature fish assemblages in the rio Jacundá, Brazil","authors":"J. Perkin, C. Montaña, Esteban J. Nogueira, Bianca B. Brandão, G. Mattox, K. Conway","doi":"10.1590/1982-0224-2021-0051","DOIUrl":"https://doi.org/10.1590/1982-0224-2021-0051","url":null,"abstract":"Abstract South America is home to more miniature fishes (<26 mm in standard length) than any other continent. Despite this diversity, the ecology of miniature fishes is poorly studied. To promote the study of miniature fish ecology, we investigated patterns in total richness, assemblage structure and environmental correlates for miniature fishes in the rio Jacundá drainage of the Lower Amazon River basin, Pará State. Based on multi-pass dip-netting of leaf litter at 20 locations distributed across two sites, we collected miniature species and used rarefaction to estimate 9 to 14 species might be present. The miniature fish assemblage at the upstream site was a nested subset of the downstream site, and water pH and canopy cover, two features known to be altered by deforestation, correlated most strongly with assemblage variation. Our work represents one of the first quantitative assessments of environmental correlates with miniature fish assemblages and highlights research topics that should be investigated further to promote conservation and preservation of the overlooked and understudied Amazonian diminutive freshwater fish fauna.","PeriodicalId":19103,"journal":{"name":"Neotropical Ichthyology","volume":"56 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67198991","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}

引用次数: 1

Description of a new species of miniature catfish of the genus Ammoglanis (Siluriformes: Trichomycteridae) from rio Tapajós basin, Brazil 巴西里约热内卢Tapajós盆地Ammoglanis属小型鲶鱼一新种记述(蛭形目:毛鳞鱼科)

IF 1.7 4区生物学

Neotropical Ichthyology Pub Date : 2022-01-01 DOI: 10.1590/1982-0224-2021-0122

A. L. C. Canto, A. Hercos, F. Ribeiro

引用次数: 1

A new species of Ancistrus (Siluriformes: Loricariidae) from Tapajós and Xingu basins, Brazil 文章标题巴西Tapajós和新古盆地一新种(志留虫目:蠓科)

IF 1.7 4区生物学

Neotropical Ichthyology Pub Date : 2022-01-01 DOI: 10.1590/1982-0224-2021-0129

Emanuel B. Neuhaus, M. R. Britto, J. Birindelli, L. Sousa

引用次数: 2

New species of Phenacorhamdia (Siluriformes: Heptapteridae) from the Xingu River basin 文章标题新谷河流域棘足虫属新种(志留目:七足虫科)

IF 1.7 4区生物学

Neotropical Ichthyology Pub Date : 2022-01-01 DOI: 10.1590/1982-0224-2021-0143

Gabriel S. C. Silva, L. Ochoa, Í. S. Castro

引用次数: 1

Divergence times of the Rhoadsia clade (Characiformes: Characidae) Rhoadsia分支的分化时期(特征:特征科)

IF 1.7 4区生物学

Neotropical Ichthyology Pub Date : 2022-01-01 DOI: 10.1590/1982-0224-2022-0054

R. V. Cucalón, Milton Tan

引用次数: 0

Tracking the evolutionary pathways among Brazilian Lebiasina species (Teleostei: Lebiasinidae): a chromosomal and genomic comparative investigation 追踪巴西Lebiasina物种(Teleostei: Lebiasinidae)的进化途径:染色体和基因组的比较研究

IF 1.7 4区生物学

Neotropical Ichthyology Pub Date : 2022-01-01 DOI: 10.1590/1982-0224-2021-0153

Priscila Polaquini de Macedo Leite, F. M. C. Sassi, M. Marinho, M. Nirchio, Renata L. R. Moraes, G. Toma, L. Bertollo, M. Cioffi

{"title":"Tracking the evolutionary pathways among Brazilian Lebiasina species (Teleostei: Lebiasinidae): a chromosomal and genomic comparative investigation","authors":"Priscila Polaquini de Macedo Leite, F. M. C. Sassi, M. Marinho, M. Nirchio, Renata L. R. Moraes, G. Toma, L. Bertollo, M. Cioffi","doi":"10.1590/1982-0224-2021-0153","DOIUrl":"https://doi.org/10.1590/1982-0224-2021-0153","url":null,"abstract":"Abstract Despite several difficulties in chromosomal analyses of small-sized fishes, the cytogenetics of the Lebiasinidae was largely improved in the last years, showing differential patterns in the chromosomal evolution inside the family. In this context, it has been shown that genus Lebiasina preserves its karyotypic macrostructure, composed of 2n = 36 chromosomes, whereas the other genera generally present higher 2n. This study focused on the comparative cytogenetics of three Lebiasina species, one of them analyzed here for the first time, using conventional and molecular procedures. The results reinforced the differentiated evolutionary path of the genus Lebiasina while, at the same time, highlighted the genomic particularities that have accompanied the evolution of each species. In this sense, the repetitive components of the genome played a significant role in the differentiation of each species. It is also notable that L. minuta and L. melanoguttata, the two species that occur exclusively in the Brazilian territory, show greater chromosomal similarities to each other than to the trans-Andean sister species, L. bimaculata.","PeriodicalId":19103,"journal":{"name":"Neotropical Ichthyology","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67199830","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}

引用次数: 2

Temporal genetic structure of a stock of Prochilodus lineatus (Characiformes: Prochilodontidae) in the Mogi-Guaçu River ecosystem, São Paulo, Brazil 巴西圣保罗地区mogi - gua<s:1>河生态系统中一群原chilodus lineatus(特征:原chilodontidae)的时间遗传结构

IF 1.7 4区生物学

Neotropical Ichthyology Pub Date : 2022-01-01 DOI: 10.1590/1982-0224-2021-0156

I. F. Rosa, Daniela J. de Oliveira, Vanessa P. da Cruz, F. Y. Ashikaga, Gabriela Omura Costa, L. Doretto, J. A. Senhorini, Rita de C. Rocha, Fabio P. Foresti, C. Oliveira, F. Foresti

{"title":"Temporal genetic structure of a stock of Prochilodus lineatus (Characiformes: Prochilodontidae) in the Mogi-Guaçu River ecosystem, São Paulo, Brazil","authors":"I. F. Rosa, Daniela J. de Oliveira, Vanessa P. da Cruz, F. Y. Ashikaga, Gabriela Omura Costa, L. Doretto, J. A. Senhorini, Rita de C. Rocha, Fabio P. Foresti, C. Oliveira, F. Foresti","doi":"10.1590/1982-0224-2021-0156","DOIUrl":"https://doi.org/10.1590/1982-0224-2021-0156","url":null,"abstract":"Abstract Prochilodus lineatus is a species of migratory fish widely distributed in the Paraná River basin, found mainly in the Grande, Pardo and Mogi-Guaçu rivers located in a well-developed region of the state of São Paulo. This study analyzes the genetic diversity and population structure in shoals of P. lineatus based on temporal analysis of specimens sampled over the years 2003, 2005, 2006, 2009, 2010, and 2015 in the Mogi-Guaçu River, São Paulo, at the region of Cachoeira de Emas. Genetic analysis performed using the D-Loop and seven microsatellite marker revealed significant genetic variability in all sampled groups. Moderate levels of structuring between groups were identified with the microsatellite markers (Fst = 0.14), while the mitochondrial marker did not reveal patterns of genetic structuring (Fst = 0.01). The genetic variability fluctuated over time, characterizing patterns of structuring among the analyzed samples. The occurrence of environmental alterations resulting in increased mortality rates, as well as changes in the water level in the ecosystem, among other factors, could determine changes in the reproductive behavior of species. The lack of favorable environmental conditions for reproduction in the basin, as reflected by tests of population bottlenecks, could have resulted in the differentiation of populations of P. lineatus over time.","PeriodicalId":19103,"journal":{"name":"Neotropical Ichthyology","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67199889","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}

引用次数: 2

Taxonomy of the armored catfish genus Aspidoras (Siluriformes: Callichthyidae) revisited, with the description of a new species 重新研究了有甲鲶鱼属的分类学(蛭形目:有甲鲶鱼科)，并描述了一新种

IF 1.7 4区生物学

Neotropical Ichthyology Pub Date : 2022-01-01 DOI: 10.1590/1982-0224-2022-0040

L. F. C. Tencatt, M. R. Britto, I. Isbrücker, C. S. Pavanelli

{"title":"Taxonomy of the armored catfish genus Aspidoras (Siluriformes: Callichthyidae) revisited, with the description of a new species","authors":"L. F. C. Tencatt, M. R. Britto, I. Isbrücker, C. S. Pavanelli","doi":"10.1590/1982-0224-2022-0040","DOIUrl":"https://doi.org/10.1590/1982-0224-2022-0040","url":null,"abstract":"Abstract Aspidoras comprises 25 species currently considered as valid, being widely distributed in Brazil, occurring from the upper rio Paraná basin in São Paulo to coastal basins of Ceará. After Nijssen, Isbrücker’s review more than 40 years ago, no extensive work regarding the taxonomy of Aspidoras was conducted. Our paper presents a comprehensive taxonomic revision of the genus, based primarily on the extensive material that has been collected since then. Considering the new diagnosis plus the available phylogenetic data, A. pauciradiatus and A. virgulatus are transferred to Corydoras and Scleromystax, respectively. New synonymies are proposed: A. eurycephalus and A. taurus with A. albater; A. menezesi and A. spilotus with A. raimundi; and A. microgalaeus and A. marianae with A. poecilus. Additionally, a new species from the Araguaia and Paraguay river basins is described, which can be distinguished from its congeners by the morphology of its complex vertebra and infraorbital 1. Thereby, the number of valid species within Aspidoras was reduced from 25 to 18. Redescriptions for A. albater, A. belenos, A. depinnai, A. fuscoguttatus, A. lakoi, A. maculosus, A. poecilus, A. psammatides, A. raimundi, and A. velites are provided. An identification key to the species of Aspidoras is also provided.","PeriodicalId":19103,"journal":{"name":"Neotropical Ichthyology","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67200192","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}

引用次数: 3