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Fluids and jellies of the Acusticolateralis system in relation to body fluids in Coryphaenoides rupestris and other fishes
Fänge, R.; Larsson, Å.; Lidman, U. (1972). Fluids and jellies of the Acusticolateralis system in relation to body fluids in Coryphaenoides rupestris and other fishes. Mar. Biol. (Berl.) 17: 180-185
In: Marine Biology. Springer: Heidelberg; Berlin. ISSN 0025-3162, more
Peer reviewed article  

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Keyword
    Marine

Authors  Top 
  • Fänge, R.
  • Larsson, Å.
  • Lidman, U.

Abstract
    The marine deep-water fish Coryphaenoides rupestris has a lymph-like fluid in its large cranial lateral-line canals. A similar canal endolymph is also found in a few other fishes possessing closed lateral-line canals. We have analysed, chemically, the canal endolymph from 3 species of teleosts. In C. rupestris, the ionic composition resembles that of blood plasma, but the content of potassium is slightly lower. In Lota lota, the canal endolymph has a high potassium concentration, as does the inner-ear endolymph. In Glyptocephalus cynoglossus, the ionic composition of the canal endolymph resembles sea water. In all species, the concentrations of glucose and protein are much lower than in the blood plasma. Analyses were further made on endolymph and perilymph of the inner ear, on jelly-like material from the acusticolateralis system, and on body fluids from a small number of fish species, even elasmobranchs and a holocephalan. The water phase of the cupulae of the lateral-line system of C. rupestris had an ionic composition similar to that of the endolymph surrounding the cupulae. High potassium and low values for glucose and protein were found in the inner-ear endolymph of all species investigated. No carbonic anhydrase activity was found in the lateral-line system of C. rupestris, whereas a low activity of this enzyme was found in the inner ear of Gadus morrhua. The investigation shows that the composition of the fluids in contact with the mechano-receptors of the lateral-line system differs between different species of fishes. A few observations were made on the structural organization of the cranial lateral-line system in C. rupestris.

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