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野钓勿忘放生怀卵鱼
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作者 张锡恩 《中国钓鱼》 2005年第11期56-57,共2页
我国海洋、江河、湖泊、水库、沟渠、坑塘等自然水域,鱼类资源逐年锐减,天然捕捞及垂钓鱼类品种日渐减少,鱼种规格也越来越小。有些自然水域已无鱼类生存,致使广大垂钓爱好者埋怨“无鱼可钓”。鱼类资源惨遭破坏,社会因素和自然因... 我国海洋、江河、湖泊、水库、沟渠、坑塘等自然水域,鱼类资源逐年锐减,天然捕捞及垂钓鱼类品种日渐减少,鱼种规格也越来越小。有些自然水域已无鱼类生存,致使广大垂钓爱好者埋怨“无鱼可钓”。鱼类资源惨遭破坏,社会因素和自然因素都很多,有些破坏行为我们钓鱼人也无能为力。作为钓鱼人,只能“从我做起”,增强鱼类资源保护意识,保护鱼类生态环境,保护鱼类资源,笔者呼吁野外垂钓勿忘放生怀卵鱼。 展开更多
关键词 怀卵鱼 类资源保护 类生态环境 野外垂钓 钓具 钓饵 体育休闲活动
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用RT-PCR检测出血性败血症病毒
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作者 李凯年 《畜牧兽医科技信息》 2000年第10期10-10,共1页
对编码病蛋白G的基因进行PCR双扩增后再进行逆转录(RT-PCR)表明可以替代用细胞培养进行病毒测定诊断虹鳟的出血性败血症病毒(VHSV)。这种RT-PCR比病毒测定法快速、敏感不扩增其他弹状病毒包括传染性造血器官坏死病毒和French参考株69/87、
关键词 出血性败血症 RT-PCR检测 传染性造血器官坏死病毒 细胞培养 弹状病毒 试验感染 病蛋白 逆转录 测定法 怀卵鱼
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Fecundity and Distribution of Oocyte Diameters of Horse Mackerel Trachurus trachurus from Algerian Western Coast (Oran Bay)
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作者 Malika Gherram Ahmed Bensahla Talet +1 位作者 Sidi Mohammed El Amine Abi Ayad Fatiha Dalouche 《Journal of Life Sciences》 2013年第12期1272-1277,共6页
In the present paper, a study of the productivity of oocytes in 402 female individuals of the horse mackerel, Trachurus trachurus for an interval of fork length (LF) between 14 cm and 20 cm, in stage IV (pre-spawn... In the present paper, a study of the productivity of oocytes in 402 female individuals of the horse mackerel, Trachurus trachurus for an interval of fork length (LF) between 14 cm and 20 cm, in stage IV (pre-spawning) and V (spawning) was performed to estimate the fecundity rate in Oran Bay (Algerian western coast) since October 2008 to April 2009. Total fecundity (absolute and relative) were calculated using fish length, weight and eviscerated weight of gonads. Absolute fecundity by size class oscillates from 33,375 to 56,391 eggs with an average of 48,686 ±11,470. The relative fecundity ranges from 34,802 to 139,636 eggs per 100 g body weight with an average of 96,955 ± 33,814 and it is varying between 15,544 and 46,561 per gram of gonad with an average of 28,595 ±20,251. The distribution of oocytes shows that stages I and II are presented throughout the spawning season and they constitute a stockpile for subsequent clutches. 展开更多
关键词 CARANGIDAE Trachurus trachurus REPRODUCTION FECUNDITY Oran bay Algerian western coast.
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