Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Comparative Morphology and Morphometry of the Olfactory Organ of Carassius auratus and Carassius cuvieri (Cypriniformes, Cyprinidae)

붕어 Carassius auratus와 떡붕어 Carassius cuvieri 후각기관의 형태 및 형태계측학적 비교 연구

  • Hyun-Tae Kim (Department of Science Education, Jeonju National University of Education) ;
  • Jin-hui Lee (Department of Practical Education, Jeonju National University of Education)
  • 김현태 (전주교육대학교 과학교육과) ;
  • 이진희 (전주교육대학교 실과교육과)
  • Received : 2023.05.18
  • Accepted : 2023.06.22
  • Published : 2023.08.31
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Abstract

The olfactory organ of Carassius auratus and C. cuvieri was compared morphologically and morphometrically using stereomicroscopy and statistical program (SPSS version 18.0). The external morphology of the olfactory organ consists of the open semicircular anterior and posterior nostril, and nasal flap. The internal structure showed the oval rosette consisting of several lamellae arranged radiately. In statistical analysis of standard length (SL), olfactory lamellar number (LN), and SL/LN ratio between two species using independent two sample t-test and Pearson's correlation and coefficient, C. cuvieri is the longer SL than that of C. auratus and C. auratus LN (14~20) is lager than that of C. cuvieri (14~16) (P<0.001) and C. auratus LN/SL ratio (12.7±0.7%) is larger than that of C. cuvieri (8.2±0.6%). These results suggest that i) open semicircular nostrils is functional morphology to offset the boundary layer and ii) the lager LN of smaller C. auratus may be a morphological adaptation to reflect its higher olfactory dependence than C. cuvieri and iii) such interspecific difference in LN and LN/SL ratio could be applied as a new taxonomic trait for identification.

본 연구에서는 붕어 Carassius auratus와 떡붕어 C. cuvieri 후각기관의 형태 및 형태계측학적 특징을 실체현미경과 통계프로그램 SPSS를 이용하여 묘사하고 분석하였다. 형태에서 두 종의 후각기관은 외부적으로 반원형의 개방된 전비공, 후비공, 그리고 비경계판으로 구성하며 다수의 후판으로 이루어진 로제트를 보유한 비강 내 구조를 나타냈다. 독립표본 t-검정과 Pearson 상관계수를 이용한 두 종간 체장과 후판의 통계적 분석에서 후판의 개수는 붕어(14~20)가 떡붕어(14~16)보다 더 많았고(P<0.001), 체장대비 후판의 비율 또한 붕어(12.7±0.7%)가 떡붕어(8.2±0.6)보다 더 높은 값을 나타냈다(P<0.001). 결과적으로, 주둥이 위쪽의 개방형 비공의 위치와 모양은 외부의 후각 물질의 유입을 방해하는 경계층(boundary layer)의 감소와 연관되는 형태적 적응이며 떡붕어보다 더 작은 체장에도 불구하고 더 많은 수의 붕어 후판은 생존을 위해 더 높은 후각의존도를 반영하는 형태적 전략으로 간주되며 후판 수 차이와 체장대비 비율 차이는 두 종의 새로운 분류학적 형질로 사료된다.

Keywords

Acknowledgement

This work was funded by the research grant from Jeonju National University of Education in 2023.

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