鸭绿江口脊尾白虾的生物学特征初步研究

doi:10.16378/j.cnki.1003-1111.19219

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Abstract The biological characteristics of ridgetail white prawn Exopalaemon carinicauda, as an economically important species, were monthly surveyed in Yalu River Estuary 35 km away from the downstream of the Dandong River Bridge by nets with horizontal net mouth of 10 m, vertical net mouth of 4 m, and 20 m long net bag with mesh of 5 mm, hung on both sides of a fishing vessel from May to December 2017. The results showed that a total of 206 kg ridgetail white prawn were captured during the 8-month voyage,with the body length ranging from 23 to 78 mm,body weight ranging from 0.2 to 7.9 g,average body length of (50.7±9.9) mm,and average body weight of (2.3±1.4) g. The females had higher average body length and body weight than the males did. t test indicated that there were significant difference in body length and body weight between female and male (P<0.05). The relationships between body length (L) and body weight (m) were expressed as m=9.9×10^-6L^3.1138(r²=0.9219, female) and m=2.2×10^-5L^2.9081(r²=0.9274, male).There was not significant difference between the value of allometric growth factor b and 3 (P>0.05),showing that both male and female individuals are close to the constant growth. Voyage survey data from May to December combined with fishing information of fishing vessels in Yalu River Estuary, the ridgetail white prawn spawned in May until September,with the spawning peaks in June and August, and had absolute fecundity (F_A) of 468—3151 eggs,with an average value of (1809±707) eggs. The best relationships between absolute fecundity (F_A)and body length (L) and body weight (m) were power exponential fitting,which were F_A=0.0194L^2.7652(r²=0.7487) and F_A=482.31m^0.8955(r²=0.8301).

Key words： Exopalaemon carinicauda Yalu River Estuary reproductive biology

Received: 12 October 2019

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	Articles by authors
	JI Guang
	LIU Xiuze
	DONG Jing
	WANG Xiaolin
	WANG Aiyong
	GUO Dong
	WANG Yuanyuan
	TIAN Yang

Cite this article:

JI Guang,LIU Xiuze,DONG Jing, et al. Biological Characteristics of Ridgetail White Prawn Exopalaemon carinicauda in Yalu River Estuary[J]. Fisheries Science, 2021, 40(3): 434-439.

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https://www.shchkx.com/EN/10.16378/j.cnki.1003-1111.19219 OR https://www.shchkx.com/EN/Y2021/V40/I3/434

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