一、引言短沟对虾(Penaeus semisulcatus De Haan),由于它体形与斑节对虾较相似,故在雷州半岛西部沿海的渔农群众常误称为斑节对虾。本种分布于我国南海、北部湾,资源较丰富,尤以雷州半岛西部的产量最多,主要栖息水深为20—50米、底质...一、引言短沟对虾(Penaeus semisulcatus De Haan),由于它体形与斑节对虾较相似,故在雷州半岛西部沿海的渔农群众常误称为斑节对虾。本种分布于我国南海、北部湾,资源较丰富,尤以雷州半岛西部的产量最多,主要栖息水深为20—50米、底质为泥沙或沙泥的海区。性情温和、感觉迟钝,群体分散。产卵期为3—6月。它是对虾属中个体较大者,体长一般为150—210毫米、体重为60—130克,在虾池中收捕的最大个体体长240毫米、体重达300克(而墨吉对虾和长毛对虾的体长一般为130—180毫米、体重为40—80克)。目前市场上的销价高于墨吉对虾和长毛对虾。具有个体大、食性杂。展开更多
短沟对虾(Penaeus semisulcatus de haan),俗称花脚虾、黑节虾,台湾称熊虾。体有浓淡相间的棕色斑纹,附肢紫红色,额角侧沟只到头胸甲中部。这种虾性情温和、感觉迟钝、群体分散,是对虾属中个体较大者,体长一般为15～21厘米,体重60～130...短沟对虾(Penaeus semisulcatus de haan),俗称花脚虾、黑节虾,台湾称熊虾。体有浓淡相间的棕色斑纹,附肢紫红色,额角侧沟只到头胸甲中部。这种虾性情温和、感觉迟钝、群体分散,是对虾属中个体较大者,体长一般为15～21厘米,体重60～130克。具有个体大、食性杂、生命力强,生长快和经济价值高等优点。去年,对虾发生流行性病害,中国对虾,长毛对虾。展开更多
960433 放流时鱼体大小对夏威夷鲻渔业提高的重要性=Significace of fish size-at-re-lease on enhancement of striped mullet fish-eries in Hawaii[刊,英]/Leber K M//J.World Aquac.Soc..—1995,26(2).
941962 亚马逊河中游鱼类的卵大小和仔鱼发育=Egg size and larval development incentral anazonian fish[刊,英]/Araujo-LimaC A R M//J.Fish Bio1..—1994.44(3).—371～389作者研究了亚马逊河中游鱼类14种(脂鲤目7种、丽鱼科5种和鲇...941962 亚马逊河中游鱼类的卵大小和仔鱼发育=Egg size and larval development incentral anazonian fish[刊,英]/Araujo-LimaC A R M//J.Fish Bio1..—1994.44(3).—371～389作者研究了亚马逊河中游鱼类14种(脂鲤目7种、丽鱼科5种和鲇目2种)的仔鱼发育和卵大小的关系。在激活时作为卵黄干重测定卵的大小(卵减去卵壳)。在发育阶段作为仔鱼干重和年龄(从激活小时)展开更多
The present study was conducted to investigate the effect of gamma irradiation on white spot syndrome virus （WS SV）. White spot syndrome virus is a pathogen of major economic importance in cultured penaeid shrimp in...The present study was conducted to investigate the effect of gamma irradiation on white spot syndrome virus （WS SV）. White spot syndrome virus is a pathogen of major economic importance in cultured penaeid shrimp industries. White spot disease can cause mortalities reaching 100% within 3-10 days of gross signs appearing. During the period of culture, immunostimulant agents and vaccines may provide potential methods to protect shrimps from opportunistic and pathogenic microrganisms. In this study, firstly, WSSV was isolated from infected shrimp and then multiplied in crayfish. WSSV was purified from the infected crayfish haemolymph by sucrose gradient and confirmed by transmission electron microscopy. In vivo virus titration was performed in shrimp, Penaeus semisulcatus. The LD50 of live virus stock was calculated 1054/mL. Shrimp post-larvae （1-2 g） were treated with gamma-irradiated （different doses） WSSV （10^o to 10^-4 dilutions） for a period of 10 days. The dose/survival curve for irradiated and un-irradiated WSSV was drawn; the optimum dose range for inactivation of WSSV and unaltered antigenicity was obtained 14- 15 kGy. This preliminary information suggests that shrimp appear to benefit from treatment with gamma- irradiated WSSV especially at 14-15 KGy.展开更多
文摘一、引言短沟对虾(Penaeus semisulcatus De Haan),由于它体形与斑节对虾较相似,故在雷州半岛西部沿海的渔农群众常误称为斑节对虾。本种分布于我国南海、北部湾,资源较丰富,尤以雷州半岛西部的产量最多,主要栖息水深为20—50米、底质为泥沙或沙泥的海区。性情温和、感觉迟钝,群体分散。产卵期为3—6月。它是对虾属中个体较大者,体长一般为150—210毫米、体重为60—130克,在虾池中收捕的最大个体体长240毫米、体重达300克(而墨吉对虾和长毛对虾的体长一般为130—180毫米、体重为40—80克)。目前市场上的销价高于墨吉对虾和长毛对虾。具有个体大、食性杂。
文摘短沟对虾(Penaeus semisulcatus de haan),俗称花脚虾、黑节虾,台湾称熊虾。体有浓淡相间的棕色斑纹,附肢紫红色,额角侧沟只到头胸甲中部。这种虾性情温和、感觉迟钝、群体分散,是对虾属中个体较大者,体长一般为15～21厘米,体重60～130克。具有个体大、食性杂、生命力强,生长快和经济价值高等优点。去年,对虾发生流行性病害,中国对虾,长毛对虾。
文摘960433 放流时鱼体大小对夏威夷鲻渔业提高的重要性=Significace of fish size-at-re-lease on enhancement of striped mullet fish-eries in Hawaii[刊,英]/Leber K M//J.World Aquac.Soc..—1995,26(2).
文摘941962 亚马逊河中游鱼类的卵大小和仔鱼发育=Egg size and larval development incentral anazonian fish[刊,英]/Araujo-LimaC A R M//J.Fish Bio1..—1994.44(3).—371～389作者研究了亚马逊河中游鱼类14种(脂鲤目7种、丽鱼科5种和鲇目2种)的仔鱼发育和卵大小的关系。在激活时作为卵黄干重测定卵的大小(卵减去卵壳)。在发育阶段作为仔鱼干重和年龄(从激活小时)
基金Supported by the Nuclear Science and Technology Research Institute,Karaj,Iran(No.A87A061,2009)
文摘The present study was conducted to investigate the effect of gamma irradiation on white spot syndrome virus （WS SV）. White spot syndrome virus is a pathogen of major economic importance in cultured penaeid shrimp industries. White spot disease can cause mortalities reaching 100% within 3-10 days of gross signs appearing. During the period of culture, immunostimulant agents and vaccines may provide potential methods to protect shrimps from opportunistic and pathogenic microrganisms. In this study, firstly, WSSV was isolated from infected shrimp and then multiplied in crayfish. WSSV was purified from the infected crayfish haemolymph by sucrose gradient and confirmed by transmission electron microscopy. In vivo virus titration was performed in shrimp, Penaeus semisulcatus. The LD50 of live virus stock was calculated 1054/mL. Shrimp post-larvae （1-2 g） were treated with gamma-irradiated （different doses） WSSV （10^o to 10^-4 dilutions） for a period of 10 days. The dose/survival curve for irradiated and un-irradiated WSSV was drawn; the optimum dose range for inactivation of WSSV and unaltered antigenicity was obtained 14- 15 kGy. This preliminary information suggests that shrimp appear to benefit from treatment with gamma- irradiated WSSV especially at 14-15 KGy.
