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| 1 | Morphometric and meristic variation in two congeneric archer fishes Toxotes chatareus (Hamilton 1822) and Toxotes jaculatrix (Pallas 1767) inhabiting Malaysian coastal waters显示文摘A simple yet useful criterion based on external markings and/or number of dorsal spines is currently used to differentiate two congeneric archer fish species Toxotes chatareus and Toxotes jaculatrix.Here we investigate other morphometric and meristic characters that can also be used to differentiate these two species.Principal component and/or discriminant functions revealed that meristic characters were highly correlated with pectoral fin ray count,number of lateral line scales,as well as number of anal fin rays.The results indicate that T.chatareus can be distinguished from T.jaculatrix by having a greater number of lateral line scales,a lower number of pectoral fin rays,and a higher number of anal fin rays.In contrast,morphometric discriminant analyses gave relatively low distinction:76.1% of fish were ascribed to the correct species cluster.The observed morphometric differences came from the dorsal and anal spines lengths,with T.chatareus having shorter dorsal and longer anal spines than T.jaculatrix.Overall,meristic traits were more useful than morphometrics in differentiating the two species;nevertheless,meristics and morphometrics together provide information about the morphological differentiation between these two closely related archer fishes. | K.D.SIMON Y.BAKAR S.E.TEMPLE A.G.MAZLAN | 2010 | Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)2010，11，11： | 0 |
| 2 | 虹鳟假鳃组织中的碳酸酐酶免疫细胞化学定位(英文)显示文摘研究目的:假腮的功能早已引起科学家兴趣,但还有待阐明。本文通过研究硬骨鱼类品种虹鳟鱼(Oncorhynchus mykiss)的假腮碳酸酐酶的免疫定位,来探讨假腮碳酸酐酶的生理功能。研究方法:免疫组织化学染色技术。重要结论:免疫组化结果显示碳酸酐酶分布在假腮细胞中,更精确地说是在其细胞顶端分布。细胞基底端、管状系统、毛细血管和柱细胞均无免疫染色。免疫细胞化学定位进一步验证了这些结果,并显示一部分是细胞质碳酸酐酶,其余的与细胞膜结构连接。此外,腔隙层未显示出免疫过氧化物酶的活性。本研究揭示了假腮碳酸酐酶的功能与细胞外介质有关,碳酸酐酶能干预传入神经纤维刺激机制。 | S.M.RAHIM A.G.MAZLAN K.D.SIMON J.P.DELAUNOY P.LAURENT | 2014 | Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)2014，15，2： | 0 |
| 3 | Intensity of parasitic infestation in silver carp,Hypophthalmichthys molitrix显示文摘Silver carp,Hypopthalmichthys molitrix is one of the most economically valuable fish species in Bangladesh.However,its production is often hindered by parasite-induced mortality.The present study reports the intensity of parasitic infestation in 216 specimens of H.molitrix collected from different fish markets in Rajshahi City,Bangladesh.Nine different parasite species (Trichodina pediculatus,Dactylogyrus vastator,Ichthyophthirius multifilis,Gyrodactylus elegans,Lernaea sp.,Apiosoma sp.,Myxobolus rohitae,Camallanus ophiocephali,and Pallisentis ophiocephali) were recovered from the gill,skin,stomach,and intestine of host fish.The highest level of infection was observed for host skin,while lower levels were observed for host gill,stomach,and intestine.The results also revealed that the intensity of parasite infection in different organs of H.molitrix varied with the season.In particular,the highest levels of infection were recorded during the winter period (November-February),when fish are most susceptible to parasites.The findings of the study will help in the management and conservation of H.molitrix. | M.M.ALAM M.A.KHAN M.A.HUSSAIN D.MOUMITA A.G.MAZLAN K.D.SIMON | 2012 | Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)2012，13，12： | 0 |
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