珠江水系唇鲮的生物学研究  

The biology of Semilabeo notabilis Peters in the Pearl River system

作　　者：庞世勋[1] 王广军[1] 

机构地区：[1]中国水产科学研究院珠江水产研究所,广东广州510380

出　　处：《海洋渔业》2005年第3期182-186,共5页Marine Fisheries

基　　金：珠江水产研究所所长基金项目(2004-G7)

摘　　要：唇鲮(Semilabeo notabilis Peters)是珠江水系重要的经济鱼类之一.本文从唇鲮的形态特征、年轮特征、体长与体重的关系、繁殖习性以及食性等方面进行了研究.结果表明:唇鲮的年轮分为疏密型和切割型2种,新年轮形成期主要是在2～4月份;体长(L)与鳞长(R)之间的关系可用R=0.1998L-0.7624表示,体长(L)与体重(W)之间的关系可用W=0.0236L2.9538表示;自然界中以3龄鱼为主;产卵季节为2～5月份,属一次性产卵类型,相对怀卵量2350粒/g,绝对怀卵量为17575 料/ind;雌雄比例为1.91:1.唇鲮以摄食硅藻为主,对硅藻有较高的消化率,可达86.3%.Semilabeo notabilis Peters is an important economic fish in the Pearl River system. Based on the data taken from the biologcial investigations of the fish during 2003 -2004, the present paper deals with the characteristics of morphology and annual rings, the relationship between body length and length of scales, the relationship between body length and body weight, the reproduction and feeding habits of this fish. The results show that the annual rings have two types, loose - close and cut patterns. The new annual rings are formed from February to April. The relationship between body length （L） and scale length （R） may be expressed as R =0. 1998L-0. 7624, and the relationship between body length （L） and body weight （W） may be expressed as W=0. 0236L^2.9538. Specimens include 0 - 7 years old individuals, but most of them are 3 years old ones in nature. The spawning season of the fish is from February to May, and the spawning type is one-off type. The relative fecundity is 2350 eggs per gram of body weight, and absolute fecundity of female 17 575 eggs per fish. The sex ratio of the fish is 1.9 ： 1 in nature. The fish feeds mainly on diatom, with a digest rate as high as 86. 3%.

关 键 词：唇鲮 珠江水系 生物学 

分 类 号：S917[农业科学—水产科学]