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Speleology in Kazakhstan

Shakalov on 04 Jul, 2018
Hello everyone!   I pleased to invite you to the official site of Central Asian Karstic-Speleological commission ("Kaspeko")   There, we regularly publish reports about our expeditions, articles and reports on speleotopics, lecture course for instructors, photos etc. ...

New publications on hypogene speleogenesis

Klimchouk on 26 Mar, 2012
Dear Colleagues, This is to draw your attention to several recent publications added to KarstBase, relevant to hypogenic karst/speleogenesis: Corrosion of limestone tablets in sulfidic ground-water: measurements and speleogenetic implications Galdenzi,

The deepest terrestrial animal

Klimchouk on 23 Feb, 2012
A recent publication of Spanish researchers describes the biology of Krubera Cave, including the deepest terrestrial animal ever found: Jordana, Rafael; Baquero, Enrique; Reboleira, Sofía and Sendra, Alberto. ...

Caves - landscapes without light

akop on 05 Feb, 2012
Exhibition dedicated to caves is taking place in the Vienna Natural History Museum   The exhibition at the Natural History Museum presents the surprising variety of caves and cave formations such as stalactites and various crystals. ...

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That soil bulk density is the mass of dry soil per unit bulk soil [22].?

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KarstBase a bibliography database in karst and cave science.

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University of South Florida, Tampa
International Journal of Speleology, 2013, Vol 42, Issue 1, p. 57-63
Phototactic behaviour of subterranean Copionodontinae Pinna, 1992 catf ishes (Siluriformes, Trichomycteridae) from Chapada Diamantina, central Bahia, northeastern Brazil
Abstract:

The phototactic behaviour of three Copionodontinae (Trichomycteridae) catf ish species (two troglobites and one epigean) from Chapada Diamantina was studied in order to detect modif ications related to isolation in the subterranean environment. Differences in response under different luminosities were detected and, unlike other cavef ish, Copionodontinae cave species have shown to be more photophobic than the epigean syntopic to them. The troglobitic Glaphyropoma spinosum is the most photophobic, presenting this behaviour under all light intensities, and more homogeneous regarding morphological characters. It suggests that this population is probably isolated for a longer time in the subterranean environment compared to Copionodon sp. n., the other cave species, which is only photophobic under low light intensities. The indifference to light exhibited by the epigean species C. pecten could be an answer to a recent predation pressure, an ecological aspect, and perhaps this character-state is under f ixation in this population. There are also evidences that the skin has a relevant role in the perception of light for the Copionodontinae species.
Keywords: biospeleology