Correlation between feeding intensity and development of olfactory sac in larval and early juvenile taimen Hucho taimen
WANG Chang-an,LI Jin-nan,WANG Lian-sheng,ZHAO Zhi-gang, LUO Liang,DU Xue,YIN Jia-sheng,XU Qi-you
1.Heilongjiang River Fisheries Research Institute,Chinese Academy of Fishery Sciences,Harbin 150070,China;2.College of Wildlife Resources, Northeast Forestry University,Harbin 150040,China
Abstract: Development of olfactory sac was observed and described in larval and early juvenile taimen Hucho taimen under a light microscope and electron microscope(scanning electron microscope and transmission electron microscope)to know the relationship between development of olfactory sac and feeding intensity.The undifferentiated epithelia of olfactory sac and devoid of food were found in the digestive tract in the newly hatched larvae.Few individuals(11.1%)showed initial feeding 25-26 days post hatching(DPH)and the fullness rank of digestive tracts was in degree 1,and most individuals(66.7%)appeared to begin to feed at 27 DPH,but the epithelia of olfactory sac were still undifferentiated.All individuals had active feed,with fullness rank of 2(44.4%)and 3 (33.3%)in digestive tract at 29 DAH.The initial differentiation of olfactory sac was observed at 30 DPH,obviously differentiated epithelia of olfactory sac were occurred at 42 DPH,and the well developed epithelia of olfactory sac were appeared,with fullness rank of 5 in the digestive tract at 45 DPH.The first primary lamellae were formed at 55 DPH and the olfactory sac was differentiated well at 85 DPH.The cells of olfactory epithelium were divided into six categories:basal cells,supporting cells,ciliated non-sensory cells,ciliated receptor cells,rod cells and goblet cells by the light microscopy and the transmission electron microscopy.The findings provide a theoretical basis for the protection and breeding of taimen.
王常安, 李晋南, 王连生, 赵志刚, 罗亮, 都雪, 尹家胜, 徐奇友. 哲罗鱼仔稚鱼嗅囊发育及其与摄食强度的关系[J]. 大连海洋大学学报, 2017, 32(1): 20-25.
WANG Chang-an, LI Jin-nan, WANG Lian-sheng, ZHAO Zhi-gang, LUO Liang, DU Xue, YIN Jia-sheng, XU Qi-you. Correlation between feeding intensity and development of olfactory sac in larval and early juvenile taimen Hucho taimen. Journal of Dalian Ocean University, 2017, 32(1): 20-25.
2017, Vol. 32 
