NDLI: Can Otolith Microchemistry Reveal Whether the Blind Cave Gudgeon, Milyeringa veritas (Eleotridae), is Diadromous within a Subterranean Estuary?

Content Provider	Springer Nature Link
Author	Humphreys, W. F. Shiao, Jen Chieh Iizuka, Yoshiyuki Tzeng, Wann Nian
Copyright Year	2006
Abstract	The blind cavefish, Milyeringa veritas, inhabits an anchialine system, effectively a groundwater estuary, in which salinity varies between fresh and seawater at different locations and depths. Owing to the inaccessible habitat and the threatened status of the cavefish it is hard to obtain the biological information needed for their management. This paper explores the utility of otolith Sr:Ca ratio in elucidating cavefish biology. The mean Sr:Ca ratio of the water inhabited by the cavefish is correlated with both the TDS (total dissolved solids) of the habitat and with the Sr:Ca ratio of the sagittal otolith of the cavefish inhabiting that site. Mean values of Sr:Ca in otoliths suggest some cavefish inhabit sea or brackish waters while others remain in freshwater. Some individuals appear to move between waters of very different TDS at various stages but there is no consistency in the direction or apparent TDS range of the water bodies inhabited which indicates that the cavefish utilise the different water bodies opportunistically. Residual analyses indicate clear and routine changes in the TDS of the water occupied at various phases of growth, irrespective of the TDS at which the cavefish were sampled. Annular markings are present in some otoliths but they cannot be related to likely periodicities in the subterranean environment.
Starting Page	439
Ending Page	453
Page Count	15
File Format	PDF
ISSN	03781909
Journal	Environmental Biology of Fishes
Volume Number	75
Issue Number	4
e-ISSN	15735133
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2006-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	cavefish otoliths pycnocline anchialine chemocline Hydrobiology Zoology Animal Systematics/Taxonomy/Biogeography Environment Nature Conservation
Content Type	Text
Resource Type	Article
Subject	Aquatic Science Ecology, Evolution, Behavior and Systematics

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Threatened Fishes of the World: Milyeringa veritas Whitley, 1945 (Eleotridae)

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Status of the Federally Endangered Alabama Cavefish, Speoplatyrhinus Poulsoni (Amblyopsidae), in Key Cave and surrounding Caves, Alabama

Can Otolith Microchemistry Reveal Whether the Blind Cave Gudgeon, Milyeringa veritas (Eleotridae), is Diadromous within a Subterranean Estuary?

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