金黄色乌鳢形态特征及其相关参数分析

Morphological Characteristics and Parameters Measurement of Golden Yellow Channa argus

摘要: 采用传统形态测量的方法，以30尾金黄色乌鳢为实验材料，对其外部形态、可量可数性状和消化道结构进行观察和测量，初步研究了金黄色乌鳢的种质特性。金黄色乌鳢体呈圆筒形，体色呈黄色，背部和头顶黄色较深，腹部黄色较浅，身上布满圆鳞。背鳍鳍条数48~50，尾鳍鳍条数15~17，臀鳍鳍条数31~33，腹鳍鳍条数6，胸鳍鳍条数14~15。侧线鳞数60~63，侧线上鳞数7~8，侧线下鳞数16~20，第1鳃弓外鳃耙数11~13，幽门盲囊数2，脊椎骨数57~58。全长和体长的函数方程式为：L_T = 1.070L_B + 24.660 (R² = 0.987)；体长和体重函数方程式为：W_B = 0.002L_B^2.194 (R² = 0.889)。食道短而粗，胃比较发达，有明显的贲门部、盲囊部和幽门部，肠道2个弯曲，比肠长为0.557小于1，比肠重为0.004，内脏重为0.238，为金黄色乌鳢种质判别、人工养殖、选择育种提供理论依据。

Abstract: In the research, the external morphology, meristic and metric characters, and structure of the digestive tract of 30 in golden yellow Channa argus were measured and studied using the traditional methods of morphology and anatomy. The results showed as follows: The fish was cylindrical-shaped and covered with cycloid scale, and its body showed with golden yellow back and light yellow abdomen. Observed numbers of golden yellow Channa argus were: Dorsal fins: 48~50, caudal fins: 15~17, anal fins: 31~33, ventral fins: 6, pectoral fins: 14~15, lateral line scales: 60~63, upward gill fakers: 7~8, downward gill rakers: 16~20, the first-gill arch raker 11~13, pyloric caecum 2, vertebrae 57~58. The correlation equation of total length and body length was: L_T = 1.070L_B + 24.660 (R² = 0.987). The correlation equation of body length and body weight was: W_B = 0.002L_B^2.194 (R² = 0.889). The digestive tract consisted of the clearly distinguishable oesophagus, stomach, and intestine, the intestine twisted two times and intestinal length/body length: 0.557, intestinal weight/body weight: 0.004, visceral weight/body weight: 0.238. The results provided the morphometric tools for species identification, artificial propagation, and breeding variety of golden yellow C. argus.