麻醉剂丁香酚对黄腊鯵耗氧的影响

用不同浓度的丁香酚对体质量为 115～ 175 g的黄腊鲹( Trachinotus blochii)麻醉处理 15 min,每 1分钟测定容器内的氧饱和度 1次.实验结果表明,黄腊鲹的耗氧率明显地受到丁香酚的影响,在各处理组中以 10× 10- 6浓度组的耗氧率为最低( 0.33 mg/(g@ h)), 5× 10- 6浓度组次之( 0.42 mg/(g@ h)),而对照组则较高( 0.57 mg/(g@ h)).同时实验还表明经丁香酚麻醉处理的黄腊鲹鳃活动频率显著地比对照组低.此结果表明了在施用麻醉剂以后,鱼体的活动及对氧气的消耗有明显的下降,丁香酚可以作为活鱼运输过程中有效的麻醉剂.     

眼斑拟石首鱼生长特性的初步研究

本文研究了眼斑拟石首鱼生长的特性以及外界因素对共生长的影响。未成熟鱼体重与体长关系为Ｗ＝０．０１２３ＳＬ＾３．０５１１，成熟鱼其关系为Ｗ＝０．００４２ＳＬ＾３．２４２２；此鱼幼鱼全长与体长呈直线关系ＴＬ＝１．１５０６ＳＬ＋０．２８６６。在适宜的温度条件下鱼的生长快速，平均最大生长率达４．８８ｇ／ｄ。在海水养殖中起鱼死亡的临界ＤＯ值为２．０ｍｇ／ｋｍ＾３左右。我国北方养殖一年鱼的体重可达５００ｇ，南     

几种鲈形目鱼类口腔齿的比较研究

对中国海洋大学鱼类标本室保存的部分鲈形目鱼类——鲷科 Sparidae,大眼鲷科 Priacan-thidae,科 Serranidae的几种鱼类的口腔齿进行了研究。结果显示 :科与大眼鲷科的前颌骨、齿骨、犁骨、腭骨、咽骨上都着生有形态较单一的口腔齿 ,但较小 ,不是很坚固 ;而鲷科的几种鱼类口腔齿都着生在前颌骨、齿骨、咽骨上 ,且较强硬 ,形态较多样 ,特别发达。本研究为 3种鱼类的进化关系提供了某些佐证。     

圆尾斗鱼的胚胎和仔鱼发育的研究

圆尾斗鱼的受精卵呈圆球形，光滑，略带淡黄色，浮性；卵膜吸水膨胀后的平均直径为１．１９ｍｍ，当水温２１－２３．５℃时，从受精卵到孵化出膜需４２．５小时；水温２２－２４．５℃时，刚出膜仔鱼到卵黄囊消失需４天，到油球消失约２５天。出膜３０天仔鱼的形态基本与成体相似。     

A new species, Gerres septemfasciatus （Perciformes： Gerreidae） from the Chinese coastal waters of the South China Sea

We describe a new species of gerreid fish,Gerres septemfasciatus,based on four specimens collected from the northern South China Sea.G.septemfasciatus most closely resembles G.limbatus in general appearance.However,G.septemfasciatus is distinguished from the latter and other congeners by having 3 to 3.5 scales between the base of the fifth dorsal spine and lateral line.This species has a distinctive color pattern,including 7-8 regular,vertical,blue-grayish bands on its side.The distribution of this species ...     

湛江市沿海鱼类区系的初步调查

湛江市沿海鱼类共有171种．隶属于17目73科131属。软骨鱼类有8种，占总数4．7％．硬骨鱼类有163种．占总数95．3％．其中鲈形目鱼类占优势．有106种．根据区系的温度特性．湛江沿海鱼类．可以分成二个类群：暖水性鱼类135种．占总数78．95％；暖温性鱼类36种。占总数21．05％．没有冷水性鱼类．湛江沿海鱼类区系组成与闽南——台湾浅滩鱼类区系有相似之处。     

月鳢人工辅助孵化技术及其气象生态研究

通过月鳢人工辅助化试验与有关气象要素的观测,经分析发现：其人工繁殖成功的关键取决于操作技术的成熟性与气象等环境条件的适宜性。据此可探索出月鳢人工辅助孵化的关键技术及其气象生态指标。     

Application of otolith shape analysis for stock discrimination and species identification of five goby species （Perciformes： Gobiidae） in the northern Chinese coastal waters

We tested the use of otolith shape analysis to discriminate between species and stocks of five goby species( Ctenotrypauchen chinensis, Odontamblyopus lacepedii, Amblychaeturichthys hexanema, Chaeturichthys stigmatias, and Acanthogobius hasta) found in northern Chinese coastal waters. The five species were well differentiated with high overall classification success using shape indices(83.7%), elliptic Fourier coefficients(98.6%), or the combination of both methods(94.9%). However, shape analysis alone was only moderately successful at discriminating among the four stocks(Liaodong Bay, LD; Bohai Bay, BH; Huanghe(Yellow) River estuary HRE, and Jiaozhou Bay, JZ stocks) of A. hasta(50%–54%) and C. stigmatias(65.7%–75.8%). For these two species, shape analysis was moderately successful at discriminating the HRE or JZ stocks from other stocks, but failed to effectively identify the LD and BH stocks. A large number of otoliths were misclassified between the HRE and JZ stocks, which are geographically well separated. The classification success for stock discrimination was higher using elliptic Fourier coefficients alone(70.2%) or in combination with shape indices(75.8%) than using only shape indices(65.7%) in C. stigmatias whereas there was little difference among the three methods for A. hasta. Our results supported the common belief that otolith shape analysis is generally more effective for interspecific identification than intraspecific discrimination. Moreover, compared with shape indices analysis, Fourier analysis improves classification success during inter- and intra-species discrimination by otolith shape analysis, although this did not necessarily always occur in all fish species.