鲻鱼人工繁殖研究

本文报道了１９９１￣１９９５年间鲻鱼人工繁殖的研究结果。池养亲鱼经注射ＬＲＨ－Ａ及ＨＣＧ诱导能顺利排卵，亲鱼成熟率６２．７％￣９０％，产卵率６２．５％￣１００％，受精率２０％￣７５％；受精卵浮性，卵径８４０￣９２０μｍ，在水温１９￣２０℃、盐度２６．６￣２８．０、ｐＨ值７．９１￣８．２５的条件下，一般经４９￣５３ｈ孵出仔鱼，孵化率４８％￣７３％，１９９１￣１９９５年度分别孵出仔鱼１０．０、８４．１     

鲻鱼人工育苗研究

本文报道了１９９１－１９９御鲻鱼人工育苗的研究结果，在水温２４．０－２６．０℃，盐度２．０－３０．０和ｐＨ值８．２１－８．２６的条件下，初孵仔鱼经培育３８日龄变态为幼鱼，全长达２５．１０ｍｍ；１９９４－１９９５年及１９９５－１９９６年度分别育出幼鱼５１２４０属及１１２０４９尾，育苗成活率为５．９％－１２．０％《文中介绍了饵料系列，鱼苗生长与发育观察研究结果。     

几种重金属对梭鱼的急性致毒及梭鱼回避反应的试验研究

分别于１９８６和１９８７年研究了Ｃｕ，Ｚｎ，Ｃｄ对梭鱼的急性致毒效应及梭鱼对Ｃｕ，Ｚｎ，Ｃｄ，Ｃｒ的回避反应。结果表明，Ｃｕ，Ｚｎ，Ｃｄ对梭鱼均有明显的毒性，其毒性的大小顺序为Ｃｕ＞Ｚｎ＞Ｃｄ。梭鱼对Ｃｕ，Ｚｎ，Ｃｄ有显著的回避反应，其回避率大小顺序Ｃｕ＞Ｚｎ＞Ｃｄ；梭鱼对Ｃｒ无明显的回避反应，即使Ｃｒ浓度高达１００ｍｇ／Ｌ。     

Origin of the mass mortality of the flathead grey mullet (Mugil cephalus) in the Tanshui River, northern Taiwan, as indicated by otolith elemental signatures

A massive fish kill of approximately 50 tons of flathead grey mullet (Mugil cephalus) occurred in August 2006 in the Tanshui River, northern Taiwan. To clarify the origin of these mullets, 42 individuals were randomly collected to determine their ages by reading otolith annuli and to measure the trace elements in the otolith. The total lengths of the fish averaged 32.7 ± 4.4 cm, and most of the individuals were 2 years old, indicating that the mullets in the mass fish kill event were in the immature and growth stages. The Sr/Ca and Ba/Ca ratios of a subsample of 14 otoliths showed that half of the fish killed were estuarine residents, and the rest originated from marine and freshwater habitats. The multiple causes involved in this fish kill implied that additional unknown factors influenced the mullet populations on a large scale and induced them to move quickly and gather at this estuary.     

养殖鲻鱼的性别比例及其性腺发育的研究

本文报道了在全雌鲻鱼培育过程中，未经激素处理的对照组鲻鱼雌雄性比例为2.5%和97.5%。在对照组精巢和卵巢发育分别处于精原细胞期和卵原细胞期，而实验组则进入小生长期。同时，还观察到两尾鲻鱼为雌雄同体，其中一尾以精巢为主，只存在少数小的卵原细胞，另一尾则以卵巢为主，精巢正在发育。文中还讨论了对照组雄性比例高可能的原因。     

不同光照条件对幼鲻趋光行为影响的初步研究

在300cm×100cm×75cm的循环水槽内,对体长40～60mm的幼鲻(Mugilcephalus)在6个不同光照强度、20min光照时间内、2个光照区域和2种光照模式下的趋光行为进行了统计分析。结果表明,6个光照强度对幼鲻的光反应没有显著的影响(P0.05);20min内光照时间对幼鲻的光反应没有显著的影响(P0.05);幼鲻对光呈均等反应,但对光较暗区的趋性更强一些(P0.05);幼鲻在2种光照模式下的光反应总体趋势一致,但其光反应程度存在显著性差异(P0.05)。结果表明幼鲻对光呈均等反应,但更趋暗光。     

Juvenile bottlenecks and salinity shape grey mullet assemblages in Mediterranean estuaries

Previous research has suggested that competitive bottlenecks may exist for the Mediterranean grey mullets (Osteichthyes, Mugilidae) at the fry stage with the exotic Cyprinus carpio (Osteichthyes, Cyprinidae) playing a central role. As a consequence, the structure of grey mullet assemblages at later stages is thought to reflect previous competition as well as differences in osmoregulatory skills. This paper tests that hypothesis by examining four predictions about the relative abundance of five grey mullet species in 42 Western Mediterranean estuary sites from three areas (Aiguamolls de l'Empordà, Ebro Delta and Minorca) differing in the salinity level and occurrence of C. carpio. Field data confirmed the predictions as: (1) Liza aurata and Mugil cephalus were scarce everywhere and never dominated the assemblage; (2) Liza saliens dominated the assemblage where the salinity level was higher than 13; (3) Liza ramado always dominated the assemblage where the salinity level was lower than 13 and C. carpio was present; and (4) Chelon labrosus dominated the assemblage only where the salinity level was lower than 13 and C. carpio was absent. The catch per unit effort of C. labrosus of any size was smaller in the presence of C. carpio than where it had not been introduced, which is in agreement with the juvenile competitive bottleneck hypothesis. Discriminant analysis confirmed that the assemblage structure was linked to the salinity level and the occurrence of C. carpio for both early juveniles and late juveniles as well as adults. The data reported here reveal that the structure of grey mullet assemblages inhabiting Mediterranean estuaries is determined by salinity and competitive interactions at the fry stage.     

软包装即食食品——鲻鱼皮加工工艺

研究了鲻鱼皮的加工工艺 ,筛选出鲻鱼皮加工成软包装即食食品的最佳工艺条件。结果表明 :鲻鱼皮的爽脆性主要与鲻鱼皮的烫煮和冰水浸泡工艺条件有关 ,最佳条件是先用 0 8g/L的保水剂浸泡3h,然后用低浓度的有效氯杀菌 ,再在 90℃中烫煮 60s,最后迅速放进无菌冰水中浸泡。研制出的产品为螺纹状 ,具有鱼皮特有的银灰色 ,爽脆且富有韧性 ,在 0～ 5℃下可保质 45d。     

鲻Mugil cephalus L.与尖头鮻Liza tade(Forskal)骨骼系统的比较

对南海产的鲻和尖头的骨骼系统作了比较观察 ,结果表明 :两种鱼脑颅都较宽且扁 ;其鼻骨、围眶骨、翼耳骨、上耳骨 ,咽颅中的前上颌骨、上颌骨、腭骨、中翼骨、后翼骨、尾舌骨、下咽骨 ,肩带骨中的主后颞骨、后颞骨、上匙骨、匙骨 ,以及腰带骨等特征区别明显 ,其中某些特征可作为属间或种间的鉴别依据     

鲻鱼Mugil oeur Forskal的变异个体

我国没有头鲻Mugil cephalus Linnaeus,现今国内描述的头鲻,实为鲻鱼,应予更正。鲻鱼Mugil oeur Forskal存在变异个体,主要变异是第一背鳍Ⅲ棘,而正常个体Ⅳ棘。