R.C. Menni’s scientific contributions

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Publications (1)


Distribution, environment and biology of batoid fishes off Argentina, Uruguay and Brazil. A review
  • Article

January 2000

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134 Reads

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249 Citations

Revista del Museo Argentino de Ciencias Naturales

R.C. Menni

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Resumen Available published and unpublished information on the distribution , environment and biology of batoid fishes occurring off Brazil, Uruguay and Argentina is summarized and reviewed for sixty species. Zoogeographic provinces proposed by Lopez (1963, 1964) are considered an adequate framework to define the distribution of these species. The Magellanic fauna, which includes the Pacific Ocean coast off Chile, is a well-defined biological unit. Conversely, the northern fauna changes gradually from the temperate Bonaerensean District off northern Argentina, Uruguay and southern Brazil, to a subtropical and tropical fauna along most of the Brazilian coast. The more drastic change to a truly tropical fauna occurs off French Guiana and Surinam. Within the area studied, rajids are the dominant batoid family, with a large number of rhinobatids and myliobatoids to the north. A more detailed cluster analysis (Jaccard) of batoid distribution patterns, results in nine groups largely corresponding with biological and distributional information: Group I of Magellanic species, Group II of three Magellanic species extending into the Bonaerensean District, a small Group III formed by the deep water skates Bathyraja schroederi, Amblyraja frerichsi and Dasyatis cf. pastinaca, another small Group IV of species with uncommon distributions, Group V of Bonaerensean species, Group VI of relatively rare deep water species, Group VII of northern migrants into the Bonaerensean District, Group VIII of Brazilian species occurring in both the South Brazilian and Brazilian districts, and a completely different Group IX of Northern Brazilian species with their southern distributional limit usually at Rio de Janeiro. A large amount of information is available on many of the species, regarding depth and temperature of occurrence, patterns of distribution, and in many cases reproduction and feeding. Preliminary evaluations of abundance have been obtained for a few species only, but the risk of overfishing is clearly documented for some of them. An odd taxonomic - geographic situation is the status of D. cf. pastinaca, and a peculiar type of cloacal gestation has been described for Benthobatis (similar to that in Squatina). Studies at community ecology level are discussed and full references provided, including many reports only published as meeting summaries.

Citations (1)


... This skate species is endemic of the Southwest Atlantic Ocean (Last et al. 2016) and is distributed from Espírito Santo State (Brazil) (20°S) to Argentina (42°S). The species occurs in coastal waters from the shore down to 130 m deep (Figueiredo 1977;Menni and Stehmann 2000) and, according to a recent assessment, coastal environments host the greatest number of threatened species (Dulvy et al. 2021). Although several aspects of the reproductive biology of R. agassizii have been studied based on data obtained from commercial fishing vessels (Colonello, García, and Lasta 2007;Oddone et al. 2007;Estalles et al. 2009;Oddone and Capapé 2011), including egg capsule description (Oddone and Vooren 2008;Mabragaña et al. 2009Mabragaña et al. , 2011Cordeiro and Oddone 2019), no studies have directly estimated oviposition rate or fecundity. ...

Reference:

First Reports on Reproductive Traits of the Endemic Southwestern Atlantic Rio Skate Rioraja agassizii (Rajiformes, Arhynchobatidae) in Captivity
Distribution, environment and biology of batoid fishes off Argentina, Uruguay and Brazil. A review
  • Citing Article
  • January 2000

Revista del Museo Argentino de Ciencias Naturales