Buscar
Mostrando ítems 1-10 de 28
Geometric morphometrics throws light on evolution of the subterranean catfish Rhamdiopsis krugi (Teleostei: Siluriformes: Heptapteridae) in eastern Brazil
(The Linnean Society of LondonWest Sussex, 2014-10-20)
Rhamdiopsis krugi is a highly specialized troglobitic (exclusively subterranean) catfish from phreatic water bodies
of caves located within two separated metasedimentary basins in the region of Chapada Diamantina, Bahia ...
Evolution of time-control mechanisms in subterranean organisms: cave fishes under light-dark cycles (Teleostei: Siluriformes, Characiformes)
(Taylor & Francis LTDAbingdon, 2013-08-02)
Subterranean organisms are excellent models for chronobiological studies, yet relatively few taxa have been investigated with this focus. Former results were interpreted as a pattern of regression of circadian locomotor ...
Stygichthys typhlops Brittan & Böhlke, 1965 (Teleostei: Characiformes), a phreatobic fish from eastern Brazil: Comments on Sampaio et al. (2012)
(State University of New York at BuffaloBuffalo, 2014)
Comparative study on free-running locomotor activity circadian rhythms in Brazilian subterranean fishes with different degrees of specialization to the hypogean life (Teleostei: Siluriformes; Characiformes)
(TAYLOR & FRANCIS LTD, 2009)
In this paper we report findings on the presence of circadian rhythms in six species of cave-dwelling fishes from Brazil. Locomotor activity of islolated individuals was automatically recorded for 10 consecutive days under ...
Rediscovery and redescription of the unusual subterranean characiform Stygichthys typhlops, with notes on its life history
(WILEY-BLACKWELL, 2010)
The rediscovery of the enigmatic subterranean characiform Stygichthys typhlops is reported almost a half-century after the collection of the holotype, the only specimen previously known. Thirty-four specimens were collected ...
Mechanisms of pigmentation loss in subterranean fishes
(Sociedade Brasileira de Ictiologia, 2008)
Troglobitic (exclusively subterranean) organisms usually present, among their apomorphies related to the subterranean life (troglomorphisms), the regression of eyes and melanic pigmentation. The degree of regression varies ...
Surface and subterranean ichthyofauna in the Serra do Ramalho karst area, northeastern Brazil, with updated lists of Brazilian troglobitic and troglophilic fishes
(Instituto Virtual da Biodiversidade | BIOTA - FAPESP, 2008)
After an ichthyofaunistic survey in several epigean (surface) water bodies of the Serra do Ramalho, southern Bahia, conducted in May 2007, 44 species were recorded; in addition, three non-troglomorphic (normally eyed and ...
Epigean and subterranean ichthyofauna in Cordisburgo karst area, eastern Brazil
(Instituto Virtual da Biodiversidade | BIOTA - FAPESP, 2009)
After an ichthyofaunistic survey conducted in May 2007 on surface (epigean) water bodies of Cordisburgo karst area, State of Minas Gerais, 13 species were recorded, mostly characiforms; in addition three non-troglomorphic ...
A new species of Glaphyropoma: the first subterranean copionodontine catfish and the first occurrence of opercular odontodes in the subfamily (Siluriformes: Trichomycteridae)
(Sociedade Brasileira de Ictiologia, 2008)
A new species of the rare copionodontine genus Glaphyropoma is described from subterranean waters in the Diamantina Plateau, Bahia State, central northeastern Brazil. This is the first troglomorphic species in the subfamily ...
Cytogenetic and molecular analyses in troglobitic and epigean species of Pimelodella (Siluriformes: Heptapteridae) from Brazil
(SOC BRASILEIRA ICTIOLOGIAPORTO ALEGRE, 2012)
Samples from seven different locations of the genus Pimelodella were genetically examined, two caves (exclusively subterranean, upper Tocantins River and Sao Francisco River) and five epigean (from upper Parana River basin). ...