Systematics of the Neotropical characiform genus Potamorhina (Pisces, Characiformes)

Vari, Richard P.

doi:10.5479/si.00810282.400

Cited by 38 publications

(47 citation statements)

References 2 publications

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“…Identification and systematic sorting followed current literature (e.g. Buckup, 1993;Vari and Williams, 1987;Vari, 1991Vari, , 1989 going until species level, whenever possible. Meanwhile, the semi-aquatic Heteroptera (Gerromorpha) were collected with the assistance of a strainer.…”

Section: Methodsmentioning

confidence: 99%

Effects of Riparian Vegetation Integrity on Fish and Heteroptera Communities

2015

AEER

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Abstract. Freshwater ecosystems are essential to human societies. However, many anthropogenic activities have been constantly modifying these ecosystems. Such modifications can be detected and measured with the use of environmental bioindicators. This work aims to identify the effect of physical integrity of streams, riparian vegetation coverage and physical and physicochemical variables on fish and Heteroptera faunas of streams, identifying which group is a better indicator of environmental disturbance. Predictor variables were sorted into three matrices: (1) physical and physicochemical parameters of the streams, (2) environmental variables and (3) structural variables of riparian vegetation. We tested the effects of physical and physicochemical descriptors on species richness and abundance through multiple linear regressions. The effects of environmental and structural variables of the riparian vegetation were tested using ridge regressions. Physical and physicochemical variables had no effect on Heteroptera and fish communities. Environmental variables showed effect only on the community of Heteroptera. Ichthyic assemblages were not influenced by any environmental variables. Selected structural variables had no relation with the Heteroptera assemblages, neither with fish community. Therefore, we conclude that, in small Amazonian streams, Heteroptera is more sensitive to human impacts than fish. This sensibility is demonstrated by the negative relation between Heteroptera fauna and the canopy opening over the river and positively related to environment integrity. These associations were not found for icthyofauna.

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Section: Methodsmentioning

confidence: 99%

Effects of Riparian Vegetation Integrity on Fish and Heteroptera Communities

2015

AEER

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“…En el laboratorio se procedió a su identificación y agrupación por especies, cuantificándose y registrándose el peso total por especie. Los peces fueron identificados empleando descripciones y claves de Kullander (1986), Gery (1977), Vari (1984Vari ( b, 1991 …”

Section: Materials Y Métodosunclassified

Caracterización limnológica de la laguna de Cashibococha (UcayaliPerú) durante el año 2001

Riofrio

Samanez

Carrasco³

et al. 2003

Rev peru biol

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ResumenDurante el año 2001 se realizaron muestreos bimensuales en tres estaciones fijas en la laguna de Cashibococha (Ucayali, Perú). Cashibococha presenta aguas de color verdoso a café oscuro, con pH entre 6 a 6,8, Conductividad entre 10 y 30µS.cm −1, Transparencia de 21 a 59 cm y Alcalinidad Total entre 14 y 22 mg CaCO 3 / L . La temperatura superficial del agua osciló entre 24,4 y 37 ºC y el Oxígeno Disuelto entre 1,3 y 7,4 mg/ L. Los análisis bacteriológicos registraron recuentos de aerobios mesófilos entre 350 y 3600 UFC/ mL. Los coliformes totales oscilaron entre 3 y 43 NMP/ 100 mL. Se diferenciaron 47 especies pertenecientes a 20 familias de macrófitas acuáticas; el mayor número de especies se reportó durante la época de Transición − Creciente (octubre − noviembre), debido a la inundación del bosque. Fueron identificadas 52 especies de fitoplancton, la División Chlorophyta fue la mas dominante. La comunidad fitoplanctónica está dominada por las especies Actinastrum hantzschi, Spirogyra sp., Eudorina elegans, Pandorina morum y Closterium kuetzingui. Se diferenciaron 54 especies de Zooplancton. Los rotíferos fue el taxa dominante. La densidad de zooplancton está dominada por Brachionus patulus macracanthus y Polyarthra vulgaris. Fueron identificadas 66 especies de peces, pertenecientes a 55 géneros, 11 familias y 4 órdenes. El orden dominante en diversidad y abundancia fue el de Characiformes, Curimata vittata fue la especie dominante en la comunidad de peces en éstas áreas litorales. Los índices de diversidad fueron superiores a 3,0 bits. ind -1 , en todas las estaciones y lugares de muestreo. De igual manera los valores de equitabilidad fueron superiores a 0,8 en todas las estaciones y lugares de muestreo.Palabras clave: Cashibococha, Ucayali, lagos amazónicos, plancton, peces amazónicos AbstractCashibococha lagoon was studied during 2001 year. Three stations were bimonthly sampling. Cashibococha have greenish to brownish colour water, pH between 6 to 6,8, Conductivity 10 to 30 µS.cm-1 , Transparency 21 to 59 cm and Total Alkalinity 14 to 22 mg CaCO 3 / L. Surface temperature were between 24,4 and 37° C and Dissolved Oxygen 1,3 and 7,4 mg / L. Bacteriological analysis report 350 to 3600 CFU / mL for mesophilic aerobic bacteria and 3 to 43 NMP / 100 mL for total Coliforms. A total of 47 species of Freshwater Macrophytes were recorded and mayor diversity was associated with inundation of the forest period (octubre − noviembre). A total of 52 phytoplankton species were found, Chlorophyta Division was the dominant and Actinastrum hantzschi, Spirogyra sp., Eudorina elegans, Pandorina morum y Closterium kuetzingui were the principal species. In zooplankton community was recorded 54 species and the taxa dominant was Rotifera with Brachionus patulus macracanthus and Polyarthra vulgaris as principal species. Characiforms fishes was dominant and Curimata vittata the principal specie. Shannon-Wiener diversity index were highest to 3,0 bits. ind-1 in all places and times of sampling.

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“…É uma espécie de porte médio e pode atingir até 30 cm de comprimento total. Tem hábito alimentar detritívoro, faz migrações tróficas e reprodutivas, desova no início da enchente, e habita lagos de água branca (Vari 1984(Vari , 2003.…”

Section: Introductionunclassified

AS ESPÉCIES DE COPEPODA (CRUSTACEA: ERGASILIDAE) PARASITAS DOS FILAMENTOS BRANQUIAIS DE Potamorhina latior (Spix & Agassiz, 1829) (CHARACIFORMES: CURIMATIDAE) DE LAGOS DE VÁRZEA DA AMAZÔNIA CENTRAL, BRASIL

2015

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RESUMO THE SPECIES OF COPEPODA (CRUSTACEA: ERGASILIDAE) PARASITES OF GILL FILAMENTS OF Potamorhina latior (Spix & Agassiz, 1829) (CHARACIFORMES: CURIMATIDAE) OF CENTRAL AMAZON FLOODPLAIN LAKES, BRAZIL ABSTRACTThree species of Copepoda were collected in the gills of Potamorhina latior from six floodplain lakes, five from Solimões River and one from the Purus River, Amazonas State: Amplexibranchius bryconis; Ergasilus jaraquensis and Miracetyma etimaruya. Potamorhina latior is a new host for A. bryconis and E. jaraquensis and the second record for M. etimaruya. Amplexibranchius bryconis was the dominant species (77%) and with higher rates of parasites. The highest prevalence occurred in the dry season. There was no significant (p> 0.05) negative correlation between the length of P. latior and abundance. There was expanded geographical distribution of M. etimaruya to the Solimões River.

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Systematics of the Neotropical characiform genus Potamorhina (Pisces, Characiformes)

Cited by 38 publications

References 2 publications

Effects of Riparian Vegetation Integrity on Fish and Heteroptera Communities

Effects of Riparian Vegetation Integrity on Fish and Heteroptera Communities

Caracterización limnológica de la laguna de Cashibococha (UcayaliPerú) durante el año 2001

AS ESPÉCIES DE COPEPODA (CRUSTACEA: ERGASILIDAE) PARASITAS DOS FILAMENTOS BRANQUIAIS DE Potamorhina latior (Spix & Agassiz, 1829) (CHARACIFORMES: CURIMATIDAE) DE LAGOS DE VÁRZEA DA AMAZÔNIA CENTRAL, BRASIL

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