scholarly journals Hearing of the African lungfish (Protopterus annectens) suggests underwater pressure detection and rudimentary aerial hearing in early tetrapods

2015 ◽  
Vol 218 (3) ◽  
pp. 381-387 ◽  
Author(s):  
C. B. Christensen ◽  
J. Christensen-Dalsgaard ◽  
P. T. Madsen
Keyword(s):  
Protopterus Annectens ◽  
African Lungfish ◽  
Early Tetrapods

scholarly journals Hearing in the African lungfish ( Protopterus annectens ): pre-adaptation to pressure hearing in tetrapods?

2010 ◽  
Vol 7 (1) ◽  
pp. 139-141 ◽  
Author(s):  
Jakob Christensen-Dalsgaard ◽  
Christian Brandt ◽  
Maria Wilson ◽  
Magnus Wahlberg ◽  
Peter T. Madsen
Keyword(s):  
Sound Pressure ◽  
Low Frequency ◽  
West African ◽  
Low Frequencies ◽  
Frequency Responses ◽  
Protopterus Annectens ◽  
Vibration Detection ◽  
Low Frequency Vibration ◽  
African Lungfish ◽  
Early Tetrapods

Lungfishes are the closest living relatives of the tetrapods, and the ear of recent lungfishes resembles the tetrapod ear more than the ear of ray-finned fishes and is therefore of interest for understanding the evolution of hearing in the early tetrapods. The water-to-land transition resulted in major changes in the tetrapod ear associated with the detection of air-borne sound pressure, as evidenced by the late and independent origins of tympanic ears in all of the major tetrapod groups. To investigate lungfish pressure and vibration detection, we measured the sensitivity and frequency responses of five West African lungfish ( Protopterus annectens ) using brainstem potentials evoked by calibrated sound and vibration stimuli in air and water. We find that the lungfish ear has good low-frequency vibration sensitivity, like recent amphibians, but poor sensitivity to air-borne sound. The skull shows measurable vibrations above 100 Hz when stimulated by air-borne sound, but the ear is apparently insensitive at these frequencies, suggesting that the lungfish ear is neither adapted nor pre-adapted for aerial hearing. Thus, if the lungfish ear is a model of the ear of early tetrapods, their auditory sensitivity was limited to very low frequencies on land, mostly mediated by substrate-borne vibrations.

scholarly journals The Anatomy of the Gastrointestinal Tract of the African Lungfish, Protopterus annectens

2010 ◽  
Vol 293 (7) ◽  
pp. 1146-1154 ◽  
Author(s):  
José M. Icardo ◽  
Wai P. Wong ◽  
Elvira Colvee ◽  
Ai M. Loong ◽  
Yuen K. Ip
Keyword(s):  
Gastrointestinal Tract ◽  
Protopterus Annectens ◽  
African Lungfish

scholarly journals Mechanisms of acid-base regulation in the African lungfish Protopterus annectens

2007 ◽  
Vol 210 (11) ◽  
pp. 1944-1959 ◽  
Author(s):  
K. M. Gilmour ◽  
R. M. Euverman ◽  
A. J. Esbaugh ◽  
L. Kenney ◽  
S. F. Chew ◽  
...  
Keyword(s):  
Acid Base ◽  
Protopterus Annectens ◽  
African Lungfish

scholarly journals Aestivation and brain of the African lungfish Protopterus annectens

Temperature ◽  
2014 ◽  
Vol 1 (2) ◽  
pp. 82-83 ◽  
Author(s):  
Shit F Chew ◽  
Kum Hiong
Keyword(s):  
Protopterus Annectens ◽  
African Lungfish
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