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Size-mass relationships of Melanoides tuberculatus (Thiaridae: Gastropoda) in a eutrophic reservoir
Silva, Eduardo Carvalho;Molozzi, Joseline;Callisto, Marcos;
Zoologia (Curitiba) , 2010, DOI: 10.1590/S1984-46702010000500004
Abstract: this study evaluated the relationships of certain allometric measurements in melanoides tuberculatus muller, 1774, in order to develop a statistical model to estimate the biomass of this mollusc species. we measured the total length and aperture of 70 shells. these measurements were correlated with the biomass values to construct exponential and power-function models, and both models showed high coefficients of determination. the exponential model was the better biomass predictor, with a coefficient of determination over 93%. these proposed models may be an effective tool to determine the biomass of m. tuberculatus in eutrophic brazilian reservoirs.
Melanoides tuberculatus (Gastropoda: Thiaridae) as intermediate host of Heterophyidae (Trematoda: Digenea) in Rio de Janeiro metropolitan area, Brazil
Bogéa, Tami;Cordeiro, Fernanda Martins;Gouveia, Janaína Silva de;
Revista do Instituto de Medicina Tropical de S?o Paulo , 2005, DOI: 10.1590/S0036-46652005000200005
Abstract: in the late 1960s, melanoides tuberculatus snails were introduced in brazil from north/east africa and southeast asia. the first records of specimens infected with cercariae were registered in rio de janeiro state in 2001. the present study reports the occurrence of m. tuberculatus infected with larval trematodes in rio de janeiro city. bottom sediment was collected with dip nets and sieved through 0.25 inch-mesh screening. snails were transported to the laboratory in vials with stream water, then measured and individually isolated in glass vials with distilled water. they were exposed to artificial light and temperature to induce cercarial emergence. the most actively emerging cercariae were processed by differential staining and silver nitrate impregnation methods. negative snails were subsequently dissected. approximately 700 snails were collected. snail total lengths ranged from 1.2 to 3.3 cm. the prevalence rate was 15.76% although 53.76% of the snails were found infected in one of the sites. infected snails were infected with rediae and pleurolophocercous cercariae. cercarial morphology and chaetotaxy were consistent with those of the family heterophyidae mostly due to the presence of median dorsal and ventral fins on the tail and the absence of ci dorsal sensory receptors.
LARVAS DE DIGENEA EN Melanoides tuberculata (GASTROPODA: THIARIDAE) EN MEDELLíN, COLOMBIA  [cached]
VERGARA DANIELA,VELáSQUEZ LUZ ELENA
Acta Biológica Colombiana , 2009,
Abstract: RESUMEN Se describen las larvas de digeneos que se obtuvieron en Melanoides tuberculata (Gastropoda: Thiaridae), molusco dulceacuícola del que se colectaron 125 especímenes en el lago del Jardín Botánico Joaquín Antonio Uribe de Medellín. En el laboratorio se individualizaron y se estimuló la emisión cercariana con una fuente luminosa. El 9,6 % de los caracoles emitió cercarias. Los moluscos emisores se sacrificaron para obtener los demás estadios larvarios. Las larvas se montaron al microscopio, se midieron y luego se dibujaron. Los caracteres morfológicos permitieron establecer la presencia de Centrocestus formosanus (Heterophyidae) y de dos Philophthalmidae. Uno de estos es primer registro para Colombia. Se confirma la sensibilidad de M. tuberculata a infecciones por digeneos, así como la especificidad de los filoftálmidos por moluscos hospedadores de la superfamilia Cerithioidea. Palabras claves: cercarias, digenea, Melanoides tuberculata, Philophthalmidae, Redias. ABSTRACT The larvae of two trematodes found in the freshwater mollusk Melanoides tuberculata (Gastropoda: Thiaridae) are described. 125 snails from the Medellina€ s Botanical Garden Joaquín Antonio Uribe were collected. In the laboratory, each individual was placed alone and stimulated with light in order to have cercaria emission. 9.6% of the snails released cercariae. These were separated in three morphologies. From each one, 15 individuals were measured and drawn. Photographs were taken. Based on their morphological characteritics the presence of Centrocestus formosanus (Heterophyidae) was determined. The other two morphologies were classified in the family Philophthalmidae. One of them constitutes the first register for Colombia. The sensibility of M. tuberculata to infections by digeneans, and the specificity of the family Philophthalmidae to mollusk hosts of the superfamily Cerithioidea are confirmed. Key words: Cercariae, Digenea, Melanoides tuberculata, Philophthalmidae, Rediae.
LARVAS DE DIGENEA EN Melanoides tuberculata (GASTROPODA: THIARIDAE) EN MEDELLíN, COLOMBIA
VERGARA,DANIELA; VELáSQUEZ,LUZ ELENA;
Acta Biológica Colombiana , 2009,
Abstract: the larvae of two trematodes found in the freshwater mollusk melanoides tuberculata (gastropoda: thiaridae) are described. 125 snails from the medellin’s botanical garden joaquín antonio uribe were collected. in the laboratory, each individual was placed alone and stimulated with light in order to have cercaria emission. 9.6% of the snails released cercariae. these were separated in three morphologies. from each one, 15 individuals were measured and drawn. photographs were taken. based on their morphological characteritics the presence of centrocestus formosanus (heterophyidae) was determined. the other two morphologies were classified in the family philophthalmidae. one of them constitutes the first register for colombia. the sensibility of m. tuberculata to infections by digeneans, and the specificity of the family philophthalmidae to mollusk hosts of the superfamily cerithioidea are confirmed
The introduced snail Melanoides Tuberculatus (Muller, 1774) (Mollusca: Thiaridae) in aquatic ecosystems of the Brazilian Semiarid Northeast (Piranhas-Assu River basin, State of Rio Grande do Norte)
Santos, CM.;Eskinazi-Sant'Anna, EM.;
Brazilian Journal of Biology , 2010, DOI: 10.1590/S1519-69842010000100003
Abstract: records of the gastropod melanoides tuberculatus (müller, 1774), family thiaridae, in the piranhas-assu river basin in rio grande do norte reveal the dispersal of this native southeast asian and east african species into aquatic environments of the brazilian semiarid region, including artificial environments (reservoirs) and lotic systems. the eutrophic conditions of the local waterbodies appear to favor the present situation, where this invasive species reaches extremely high densities, sometimes over 10,000 ind.m-2 as in armando ribeiro gon?alves reservoir. these observations indicate the immediate need for new studies on the spatial distribution of the species and its potential impact on the biodiversity and water quality of the waterbodies of the semiarid region of the state. implantation of regular and systematic monitoring of the aquatic resources of the region is urgently required.
Distribution and habitats of Melanoides tuberculata (Müller, 1774) and M. victoriae (Dohrn, 1865) (Mollusca: Prosobranchia: Thiaridae) in South Africa
KN de Kock, CT Wolmarans
Water SA , 2009,
Abstract: An account is given of the geographical distribution and habitats of Melanoides tuberculata (Müller, 1774) and M. victoriae (Dohrn, 1865) as reflected by the samples on record in the database of the National Freshwater Snail Collection (NFSC) of South Africa. About 30 species of Melanoides occur in Africa of which only M. tuberculata is widespread. Melanoides tuberculata is also indigenous to India and the south-east Asian mainland to northern Australia and was widespread in the present-day Sahara during the late Pleistocene-Holocene, but M. victoriae seems to be restricted to Southern Africa. Details of the habitats on record for each species, as well as mean altitude and mean annual air temperature and rainfall for each locality, were processed to determine chi-square and effect-size values. An integrated decision-tree analysis indicated that temperature, altitude and type of substratum were the most important factors of those investigated that played a significant role in establishing the geographical distribution of these species in South Africa. In view of the fact that M. tuberculata can serve as intermediate host for a number of trematode species elsewhere in the world, it is recommended that the ability of the 2 local Melanoides species to act as intermediate hosts should be investigated. Due to the fact that the majority of sites from which these species were recovered were not since revisited, it is recommended that efforts should be made to update their geographical distribution and the results compared with the data in the database. The conservation status of these 2 species and the possible influence of global warming and climatic changes on their geographical distribution are briefly discussed.
Distribution and habitats of Melanoides tuberculata (Müller, 1774) and M. victoriae (Dohrn, 1865) (Mollusca: Prosobranchia: Thiaridae) in South Africa
KN de Kock, CT Wolmarans
Water SA , 2009,
Abstract: An account is given of the geographical distribution and habitats of Melanoides tuberculata (Müller, 1774) and M. victoriae (Dohrn, 1865) as reflected by the samples on record in the database of the National Freshwater Snail Collection (NFSC) of South Africa. About 30 species of Melanoides occur in Africa of which only M. tuberculata is widespread. Melanoides tuberculata is also indigenous to India and the south-east Asian mainland to northern Australia and was widespread in the present-day Sahara during the late Pleistocene-Holocene, but M. victoriae seems to be restricted to Southern Africa. Details of the habitats on record for each species, as well as mean altitude and mean annual air temperature and rainfall for each locality, were processed to determine chi-square and effect-size values. An integrated decision-tree analysis indicated that temperature, altitude and type of substratum were the most important factors of those investigated that played a significant role in establishing the geographical distribution of these species in South Africa. In view of the fact that M. tuberculata can serve as intermediate host for a number of trematode species elsewhere in the world, it is recommended that the ability of the 2 local Melanoides species to act as intermediate hosts should be investigated. Due to the fact that the majority of sites from which these species were recovered were not since revisited, it is recommended that efforts should be made to update their geographical distribution and the results compared with the data in the database. The conservation status of these 2 species and the possible influence of global warming and climatic changes on their geographical distribution are briefly discussed.
Riesgo de establecimiento del gasterópodo dulceacuícola invasor Melanoides tuberculatus (Thiaridae) en el Río de la Plata (Argentina-Uruguay) Colonization risks of the invading freshwater gastropod Melanoides tuberculatus (Thiaridae) in Río de la Plata (Argentina-Uruguay)  [cached]
Diego E. Gutiérrez-Gregoric,Roberto E. Vogler
Revista mexicana de biodiversidad , 2010,
Abstract: Melanoides tuberculatus es un gasterópodo cosmopolita que ha invadido y se ha establecido en casi todos los países del continente americano, desconociéndose en la mayoría de los casos el origen de su introducción. En este trabajo se menciona el riesgo de establecimiento de esta especie en áreas de influencia del Río de la Plata como consecuencia de su registro en acuarios de la ciudad de La Plata (Buenos Aires, Argentina) dedicados a la venta de flora y fauna limnética. A principios de 2009, la especie fue identificada a partir de 26 ejemplares procedentes de un comercio, siendo éste el registro más austral de la especie para una localidad de la cuenca del Plata. Revisiones posteriores en 3 locales comerciales de la ciudad confirmaron la presencia de la especie en 2 de ellos. Dicha presencia se relacionó con la adquisición de plantas ornamentales por parte de los establecimientos. La identificación del gasterópodo en la ciudad de La Plata debe considerarse cuidadosamente, debido a las posibles consecuencias que tendría la liberación accidental de este molusco en el Río de la Plata en lo relacionado con el desplazamiento de fauna local y salud pública. Melanoides tuberculatus is a cosmopolitan gastropod that has invaded and has now spread into most countries of the American continent. Introduction pathways remain unknown in most cases. This work draws attention on the colonization risks of this species in the Río de la Plata area as a consequence of its record in flower and pet shops - in the city of La Plata (Buenos Aires, Argentina) - in which limnic species are sold. The species was identified at the beginning of 2009 within a lot of 29 specimens from a shop, and this is the southernmost record of this species in the Plata Basin. Subsequent surveys in 3 commercial shops in the same city revealed its presence in 2 of them. This was related to the purchase of ornamental plants by the shops. Identification of this species in the city of La Plata should be carefully assessed, because of the potential consequences that settlement of this mollusk in the Río de la Plata may have on displacement of the local fauna and on public health.
Distribución y posible competencia entre Melanoides tuberculata y Tarebia granifera (Prosobranchia: Thiaridae) en el lago Hanabanilla, Cuba
GUTIERREZ AMADOR,ALFREDO; PERERA DE PUGA,GLORIA; YONG CONG,MARY; FERRER LOPEZ,JOSE RAUL; SANCHEZ NODA,JORGE;
Revista Cubana de Medicina Tropical , 1995,
Abstract: se llevó a cabo un estudio durante 3 a?os, sobre la distribución y posible competencia entre las 2 especies de tiáridos presentes en el lago hanabanilla en cuba, melanoides tuberculata y tarebia granifera . ambas especies presentaron diferencias significativas en su abundancia dentro de un microhábitat determinado, pero lograron equiparar sus densidades para el área total muestreada. estas variaciones se debieron principalmente a la proporción de juveniles de cada especie. solamente se detectó interacción significativa cuando se alcanzaron altos valores de abundancia y existía algún recurso en limitación (fundamentalmente el área más cercana a la orilla). los 2 tiáridos presentaron una alta amplitud de nicho, pero tarebia granifera fue ligeramente superior, además, esta especie fue dominante al final del estudio en la mayoría de las zonas muestreadas.
Distribución y posible competencia entre Melanoides tuberculata y Tarebia granifera (Prosobranchia: Thiaridae) en el lago Hanabanilla, Cuba  [cached]
ALFREDO GUTIERREZ AMADOR,GLORIA PERERA DE PUGA,MARY YONG CONG,JOSE RAUL FERRER LOPEZ
Revista Cubana de Medicina Tropical , 1995,
Abstract: Se llevó a cabo un estudio durante 3 a os, sobre la distribución y posible competencia entre las 2 especies de tiáridos presentes en el lago Hanabanilla en Cuba, Melanoides tuberculata y Tarebia granifera . Ambas especies presentaron diferencias significativas en su abundancia dentro de un microhábitat determinado, pero lograron equiparar sus densidades para el área total muestreada. Estas variaciones se debieron principalmente a la proporción de juveniles de cada especie. Solamente se detectó interacción significativa cuando se alcanzaron altos valores de abundancia y existía algún recurso en limitación (fundamentalmente el área más cercana a la orilla). Los 2 tiáridos presentaron una alta amplitud de nicho, pero Tarebia granifera fue ligeramente superior, además, esta especie fue dominante al final del estudio en la mayoría de las zonas muestreadas.
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