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Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 4
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Distribution, abundance and morphometry of Atlantoraja cyclophora (Regan, 1903) (Elasmobranchii: Rajidae) in southern Brazil, Southwestern Atlantic Neotropical Ichthyology
Oddone,María Cristina; Vooren,Carolus Maria.
A total of 459 individuals of Atlantoraja cyclophora were captured along the Rio Grande do Sul coast between latitudes 30º40'S and 34º30'S. Two surveys were performed, in the winter 2001 and in the summer/autumn 2002, using bottom-trawl between the depths of 100 and 600 m. This species occurred between 100 and 300 m deep, without significant differences in the frequency of occurrence and abundance (CPUE; kg/hour) between latitudes, depth and seasons. The sex ratio was not significantly different from 1:1 in all depths. In the study area, temperature ranged between 10.0 ºC and 17.6 ºC and salinity between 35.2 e 36.0 ppm. There was no correlation between CPUE and depth, temperature and salinity. Mean total length of females (53.2 cm) was significantly...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Abundance; Distribution; Occurrence; Sex ratio; Morphometry.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252004000300005
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Microscopic structure of the egg capsule of Atlantoraja cyclophora (Elasmobranchii: Rajidae: Arhynchobatinae) Biota Neotropica
Oddone,María Cristina.
The microscopic structure of the egg capsules of Atlantoraja cyclophora, a species endemic to the Atlantic region of South America, is presented in this paper. In a transverse section, the dorsal face of the egg case is 70mu in width, and is subdivided into four layers. Ventrally, the egg capsule wall is 60 mu wide and composed of three layers. Both faces are covered by prickles which render the egg capsule surface striated to the naked eye.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rajoids; Egg capsules; Atlantoraja cyclophora; Oviparity.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032005000300020
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PRIMER REGISTRO DE MANTA BIROSTRIS (DONNDORFF 1798) (BATOIDEA: MOBULIDAE) EN EL RIO DE LA PLATA, URUGUAY Gayana
Milessi,Andrés C.; Oddone,María Cristina.
Se registró la presencia de un macho de la mantarraya Manta birostris (Donndorff 1798) en la desembocadura del arroyo Pando (34° 48' S-55° 43' O), Río de la Plata, Uruguay. El ancho del disco fue de 4.20 m con un peso estimado de 900 kg. Este hallazgo es el primer registro de M. birostris para las costas uruguayas y representa una ampliación, hacia el sur, del área de distribución de esta especie en el Océano Atlántico sudoccidental. Se discute, además, la ocurrencia de esta especie oceánica en aguas estuarinas
Tipo: Journal article Palavras-chave: Manta birostris distribución; Atlántico sudoccidental Chondricthyes.
Ano: 2003 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382003000100017
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Record of the freshwater stingrays Potamotrygon brachyura and P. motoro (Chondrichthyes, Potamotrygonidae) in the lower Uruguay river, South America Acta Amazonica
Oddone,María Cristina; Velasco,Gonzalo; Charvet,Patricia.
Freshwater stingrays, or potamotrygonids, are restricted to Neotropical river drainages. These elasmobranchs are well adapted to freshwater environments and the number of described species gradually increases as further research is carried out. Some of the first studies on their systematics and natural history were carried out in the 1960s and 1970s in southern South America. However, there is no new published data on potamotrygonids from Uruguayan waters since then (except for local journal reports from sportive fishermen and specimens deposited in Uruguayan collections). The present study aims to record the recent occurrence of two species of potamotrygonids caught by sport fishermen, with comments on other published historical records for the same area....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Potamotrygonidae; Nuevo Berlín; Paysandú; Matrotrophy; Potamotrygonid.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672012000200018
Registros recuperados: 4
Primeira ... 1 ... Última
 

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