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Articles 1 - 5 of 5
Full-Text Articles in Physical Sciences and Mathematics
Habitat Use And Gas Bubble Disease In Southern Cavefish (Typhlichthys Subterraneus), Alex L. S. Schubert, Carl D. Nielsen, Douglas B. Noltie
Habitat Use And Gas Bubble Disease In Southern Cavefish (Typhlichthys Subterraneus), Alex L. S. Schubert, Carl D. Nielsen, Douglas B. Noltie
International Journal of Speleology
In situ observations of habitat use by southern cavefish (Typhlichthys subterraneus) in a Missouri, U.S.A. spring suggest that groundwater discharge and that zones of substrate which have large interstitial spaces that fish can enter may be important components of the species habitat. Such substrates may also facilitate smallscale dispersal. In addition, we document the first recorded case of gas bubble disease in a laboratory-held specimen of this species. Cavefish may be particularly susceptible to this malady, and the conditions under which it occurred are important to avoid should captive maintenance or propagation of this or related species be …
The Second Occurrence Of The Troglobic Shrimp Macrobrachium Microps Holthuis (Crustacea, Decapoda, Palaemonidae), In Samoa, Alexander J. Bruce, Thomas M. Iliffe
The Second Occurrence Of The Troglobic Shrimp Macrobrachium Microps Holthuis (Crustacea, Decapoda, Palaemonidae), In Samoa, Alexander J. Bruce, Thomas M. Iliffe
International Journal of Speleology
A single example of Macrobrachium from an anchialine lava tube un Upolu, Samoa, is described and illustrated. The specimen is referred to M. microps Holthuis, 1978, but shows some differences that may be of specific value, which are discussed. The troglobic species of Macrobrachium are reviewed.
Harpacticoida (Crustacea, Copepoda) From Subterranean Waters Of Bue Marino Cave, Sardinia, And St. Barthélémy Cave, Corsica, And Description Of Three New Species, Vezio Cottarelli, Maria Cristina Bruno
Harpacticoida (Crustacea, Copepoda) From Subterranean Waters Of Bue Marino Cave, Sardinia, And St. Barthélémy Cave, Corsica, And Description Of Three New Species, Vezio Cottarelli, Maria Cristina Bruno
International Journal of Speleology
Three new species of harpacticoid copepods are described and discussed. Nitocrella beatricis n. sp. has been collected in different hyporheic sites in Sardinia and in two caves (Bue Marino cave in Sardinia and St. Barthélémy cave in Corsica); Elaphoidella janas n. sp. and Parastenocaris triphyda n. sp. have been collected only in Bue Marino cave. Some considerations concerning the ecology and biogeography of the three species are also presented.
Comparative Performances Of Non-Visual Food Search In The Hypogean Cyprinid Phreatichthys Andruzzii And In The Epigean Relative Barbus Filamentosus, Roberto Berti, Luca Masciarelli
Comparative Performances Of Non-Visual Food Search In The Hypogean Cyprinid Phreatichthys Andruzzii And In The Epigean Relative Barbus Filamentosus, Roberto Berti, Luca Masciarelli
International Journal of Speleology
The anophthalmic hypogean cyprinid Phreatichthys andruzzii Vinciguerra shows a more efficient food searching behaviour than blinded specimens of the epigean species Barbus filamentosus Cuvier and Valenciennes. This difference seems to be related to a tendency to swim near the bottom of the aquarium and the behavioural stereotypes in food localization and intake. Both in P. andruzzii and in the blinded B. filamentosus food search is guided by chemical stimulation. Other data indicate that mechanical stimulation could play an important role in the feeding behaviour of the hypogean form. The behavioural analogies in food localization between P. andruzzii and the cave …
The Cricket Fauna Of Chiapanecan Caves (Mexico): Systematics, Phylogeny And The Evolution Of Troglobitic Life (Orthoptera, Grylloidea, Phalangopsidae, Luzarinae), Laure Desutter-Grandcolas
The Cricket Fauna Of Chiapanecan Caves (Mexico): Systematics, Phylogeny And The Evolution Of Troglobitic Life (Orthoptera, Grylloidea, Phalangopsidae, Luzarinae), Laure Desutter-Grandcolas
International Journal of Speleology
The present study deals with the cavernicolous Grylloidea of Chiapas. It details the composition of this fauna, which belongs exclusively to the Phalangopsid group Amphiacustae, and considers its troglobitic evolution in the methodological framework of Comparative Biology. This method consists in analysing the evolution of biological features in reference to phylogeny, using character state optimization. The material studied comes mostly from Italian biospeological expeditions, but also from the authors work in Mexico, from North American biospeological expeditions achieved in Central America and the West Indies, and from the collections of the Academy of Natural Sciences of Philadelphia, the Museum National …