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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 34, No. 4, 2013, pp. 387-391
Bioline Code: zr13060
Full paper language: English
Document type: Report
Document available free of charge

Zoological Research, Vol. 34, No. 4, 2013, pp. 387-391

 en Morphological differentiations of the gills of two Gymnocypris przewalskii check for this species in other resources subspecies in different habitats and their functional adaptations
ZHANG, Ren-Yi; LI, Guo-Gang; ZHANG, Cun-Fang; TANG, Yong-Tao & ZHAO, Kai

Abstract

Gill morphologies of two subspecies of Gymnocypris przewalskii check for this species in other resources ( Gymnocypris przewalskii przewalskii check for this species in other resources and Gymnocypris przewalskii ganzihonensis check for this species in other resources ) in different habitats were analyzed under scanning electron microscope. Results indicated that G. p. przewalskii had numerous long and dense-lined gill rakers while G. p. ganzihonensis had few short and scatter-lined gill rakers. There were no significant differences in distance between gill filaments (DBF) and distance gill lamella (DBL) between the two subspecies, but gill filaments of G. p. przewalskii were longer than in G. p. ganzihonensis. The electron microscopic study indicated that the pavement epithelium cells of G. p. przewalskii were well defined as irregular ovals, but were hexagonal in G. p. ganzihonensis. Moreover, G. p. przewalskii had more chloride cells than G. p. ganzihonensis, and mucous cells were only found on the surface of gill filaments of G. p. przewalskii. The morphological differences between the two subspecies of G. przewalskii are adaptations to their corresponding diets and habitats.

Keywords
Gymnocypris przewalskii; Gill; Habitat; Scanning electron microscope; Functional adaptation

 
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