传染性胰腺坏死病的诊断与防治

一、传染性胰腺坏死病的发病和流行情况1.传染性胰腺坏死病的发病情况传染性胰腺坏死病(IPN)是鲑科鱼类鱼苗、幼鱼的一种高度传染性和急性病毒性疾病。1941年Mgonigle首次报道加拿大大西洋鲑(Salmosalar)患此病,1960年Wolf等首次从河鳟病鱼中分离出了传染性胰脏坏死病     

北京地区鲑鳟鱼类传染性造血器官坏死病的监测分析与防控

正传染性造血器官坏死病(Infectious hematopoietic necrosis,IHN)是鲑科鱼类常见的急性病毒性传染病。病原是传染性造血器官坏死病毒(Infectious hematopoietic necrosis virus,IHNV),该病毒属弹状病毒科(Rhabdoviridae)、粒外弹状病毒属(Novirhabdovirus)。世界动物卫生组织(OIE)将IHN列为必须申报的鱼类疫病。2008年11月农业部发布的《一、二、三类动物疫病病种名录》中,IHN被     

鲑鱼传染性胰脏坏死病临床诊断及检测

鲑鱼传染性胰脏坏死病（infctious pancreatic necrosis in trout,IPN）是鲑科鱼类的一种高度传染性的急性病毒疾病。该病主要病症是胰脏坏死。该病于1940年首次发现于加拿大的鲑科鱼,目前已遍及欧洲、亚洲和美洲等。     

虹鳟传染性胰脏坏死症防控措施

传染性胰脏坏死症(Infectious pancreatic necrosis,IPN)于1941年在北美发现,1960年证实其病原为传染性胰坏死病毒(Infectious pancreatic necrosis virus, IPNV)。此后传至欧洲,20世纪80年代末又传入朝鲜及我国的台湾及东北、山西、山东、甘肃等地,目前各产鱼国均有发现,是最典型的鱼病之一。此病目前尚无有效的治疗方法,严格执行苗种检疫制度,采取严格消毒和隔离措施,能有效阻断病原传播途径。     

传染性造血器官坏死病防控试验研究

正传染性造血器官坏死病(Infectious hematopoietic necrosis,IHN)是鲑科鱼类常见的急性病毒性传染病,病原是传染性造血器官坏死病毒(Infectious hematopoietic necrosis virus,IHNV)。在我国,IHN病毒于1985年首次随进口鱼带入国内,并在辽宁本溪暴发IHN,死亡率近100%。随后扩散到东北和华北一带,呈散在性流行,近几年来流行有逐渐扩大和日趋严重的倾     

克氏原螯虾的传染性疾病及其预防方法(下)

正3.核糖核酸(RNA)和推定的核糖核酸(RNA)病毒(RNA and Putative RNA Viruses)——双RNA病毒(Birnavirus)(1)传染性胰腺坏死病毒(Infectious pancreatic necrosis virus,IPNV)——呼肠孤病毒(Reo-like virus)。(2)澳洲红螯螯虾肝胰腺呼肠孤样病毒(Cherax quadricarinatus hepatopancreatic reo-like virus,Cq HRV),澳洲     

传染性造血组织坏死病病毒(IHNV)的流行病学及检测技术研究进展

<正>传染性造血器官坏死病是感染鲑鳟鱼类的一种严重的传染性疾病。传染性造血组织坏死病病毒(Infectious Hematopoietic Necrosis Virus,IHNV)是传染性造血组织坏死病的病原体,主要感染鲑鱼科的各种鱼类,常造成鱼苗或幼鱼70%～90%的死亡率,在某些病例中甚至接近100%,对世界鲑鱼养殖业造成了巨大的经济损失。过去IHN只流行于北美洲和欧洲一些国     

传染性造血器官坏死

传染性造血器官坏死(Infectious haematopoietic necrosis,IHN)是由弹状病毒引起的鱼类急性、全身性传染病,主要发生于鳟和太平洋大马哈鱼鱼苗和种负,病鱼表现为狂游和造血器官坏死,世界动物卫生组织(OIE)将其列为必须申报的动物疫病,为我国的二类疫病.     

传染性胰脏坏死病疫苗的研究进展

传染性胰脏坏死病（infectious pancreatic necrosis,IPN）是由传染性胰脏坏死病毒（infectious pancreatic necrosis virus,IPNV）引起的死亡率高达90%的鲑鳟鱼病毒性疾病。该病分布广泛，流行于欧洲、美洲、非洲以及亚洲等多个地区；传染性极强，病原极其稳定，幸存的鱼苗作为病毒携带者具有传染性，对世界鲑鳟鱼养殖业造成了巨大的经济损失。接种疫苗是防控该病毒病的最有效方式，但是，目前我国没有商业化的IPN疫苗。由于毒株存在变异及生物安全隐患，国外商业化的IPN疫苗无法直接引进应用。本文总结了IPN疫苗的研究进展，可为我国IPN的有效防控提供参考。     

笋壳鱼暴发传染性脾肾坏死病毒病的风险评估

正笋壳鱼暴发传染性脾肾坏死病毒病的病原为传染性脾肾坏死病毒(Infectious spleen and kidney necrosis virus,ISKNV)。自从1997年首次从鳜鱼上发现报道ISKNV以来,该病已经在中国大部分的地方被确诊,同时在笋壳鱼、乌鳢、加州鲈等鱼类上都发现了该病,对我国水产养殖业造成了巨大的损失。本文主要分析评估ISKNV在笋壳鱼上感染暴发的风险。     

Anguilla huangi Teng, Lin, and Tzeng, 2009, is a junior synonym of Anguilla luzonensis Watanabe, Aoyama, and Tsukamoto, 2009

Anguilla luzonensis and A. huangi were each described in 2009 using eels obtained from northern Luzon Island. We examined the taxonomic status of these two groups of eels using morphological and molecular genetic characters. There were no significant differences in two vertebrae counts between eels of A. luzonensis and A. huangi. Mitochondrial 16S ribosomal RNA and cytochrome b genes sequences were obtained and compared among 28 specimens of A. luzonensis, the holotypes of A. luzonensis and A. huangi, and one specimen of the other 15 anguillid species. The specimens of A. luzonensis exhibited almost identical sequences, including the holotype, with only a few site differences, and the genetic difference between the holotypes of A. luzonensis and A. huangi was within the range of differences of specimens of A. luzonensis. The other anguillid species were genetically very different from A. luzonensis and A. huangi, although A. interioris is a closely related species. It is clear that A. luzonensis and A. huangi are the same species, and according to the principle of priority in zoological nomenclature, A. luzonensis Watanabe, Aoyama, and Tsukamoto, 2009 is the valid species name, and A. huangi Teng, Lin, and Tzeng, 2009 is a junior synonym of A. luzonensis.     

Atlantic Fisheries Technological Conference,Moncton, NB,August 21, 1995

No abstract available for this article.     

Age,growth, maturity and the overfishing of the iconic sciaenid,Argyrosomus japonicus,in south-eastern,Australia

Mulloway (Argyrosomus japonicus) occur in estuarine and coastal waters surrounding Australia, Africa, India, Pakistan, China, Korea and Japan, where they are important in fisheries. This study identified that mulloway in south-eastern Australia had similar growth rates, but matured at smaller lengths and younger ages, to those in South Africa and Western Australia. Growth of both sexes was similar to about 5 years, after which females grew faster and attained a greater maximum length than males. Female mulloway matured at 4–5 years of age with a L₅₀ of 68 cm, whereas males matured at 2–3 years of age with a L₅₀ of 51 cm. The commercial fishery in New South Wales was characterised by declining catches and a reduction in the proportion of mulloway of mature lengths in landings. During 2002–2005 commercial landings were dominated (83%) by fish within 15 cm of the current minimum legal total length of 45 cm and aged 2 and 3 years (>80%), even though mulloway can attain lengths of 200 cm and live >30 years. Estimates of the rates of instantaneous total mortality ranged between 0.34 and 0.45, whilst the rate of instantaneous natural mortality (M) was estimated to be approximately 0.12. Yield-per-recruit analyses indicated that mulloway in New South Wales are being growth overfished and substantial increases in yield could be achieved by increasing the length at first harvest. Values of the spawning potential ratio were below 0.2 under a range of mortality estimates, suggesting that mulloway are at risk of recruitment overfishing. These results suggest that the spawning stock of mulloway in south-eastern Australia has been depleted and that remedial management action is required to protect this iconic species.     

Effects of Mosquitofish,Gambusia affinis,on Channel Catfish,Ictalurus puncatatus,Production Ponds

Mosquitofish, Gambusia sp., have been spread throughout the world to biologically control mosquitoes. However, the fish has gained a reputation as an invasive species and has been implicated in displacing native aquatic species. Gambusia affinis are native to the southeastern United States and commonly occur in commercial channel catfish, Ictalurus punctatus, production ponds. We investigated effects of mosquitofish presence on zooplankton populations, water quality, disease occurrence, and fish production in experimental ponds. There were no differences between ponds with or without mosquitofish in numbers of calanoid copepods, cyclopoid copepods, total copepods, Bosmina sp., Ceriodaphnia sp., Moina sp., Daphnia sp., or total cladocerans. There were also no differences in copepod and cladoceran sizes. Copepod nauplii were more numerous during the summer months in ponds with mosquitofish. There were no differences in water quality variables (soluble reactive phosphorus, nitrate, nitrite, ammonia, total nitrogen, total phosphorus, pH) or phytoplankton density between ponds stocked with and without mosquitofish. Catfish production and disease occurrence were also similar between ponds with and without mosquitofish. Although mosquitofish may cause problems when stocked outside their native range, there does not appear to be any adverse effects of mosquitofish presence in catfish production ponds.     

Surface disinfection of Pacific threadfin, Polydactylus sexfilis, and amberjack, Seriola rivoliana, eggs

The effects of exposing the eggs of Pacific threadfin and amberjack eggs (AEs) to different concentrations of hydrogen peroxide for 5 min on hatch rate and survival were assessed in a series of experiments using a petri dish model rearing system. Despite significant inter‐batch variation in hatch rate, it was shown that eggs of both species could be safely exposed to up to 11 340 mg L⁻¹ H₂O₂ for 5 min. Exposure to 34 230 mg L⁻¹ H₂O₂ for 5 min was shown to be lethal to AEs at a late stage of development. In two further experiments, it was demonstrated that Pacific threadfin eggs were resistant to all tested concentrations of a range of polyvinylpyrrolidone iodine (PVP‐I) concentrations and contact times (up to 1000 mg L⁻¹ PVP‐I for 10 min). The level of bacteria adhering to the eggs of both species was highly variable. Where eggs were heavily colonized (>10⁴ cfu egg⁻¹), hydrogen peroxide concentrations of at least 11 340 mg L⁻¹, or PVP‐I concentrations higher than 500 mg L⁻¹ for 10 min, were required for effective sterilization. In less colonized batches, rinsing in sterile seawater or exposure to lower (550 mg L⁻¹) concentrations of H₂O₂ was sufficient to result in high apparent levels of surface sterility (<1 cfu egg⁻¹).     

Compositional differences,antioxidant activity,angiotensin-converting enzyme inhibition,and sensory characteristics of kamaboko fermented in wheat,rice, brown rice,and soybean koji

Fisheries Science - Fermentation of kamaboko in koji with wheat (KW), rice (KR), brown rice (KB), or soybean (KS) was performed by simulation of tofuyo processing. Moisture and protein content...     

Sperm Motilities in Waigieu Seaperch,Psammoperca waigiensis: Effects of Various Dilutions,pH, Temperature,Osmolality, and Cations

The objectives of this study were to evaluate the effects of varying dilutions, pH, temperature, osmolality, and cations on sperm motility parameters in waigieu seaperch, Psammoperca waigiensis. The maximum velocity of average in path (VAP), percentage of motile cells (MOT), and duration of sperm motility (DSM) were observed when semen was diluted in artificial seawater (ASW) at a ratio of 1:100 (144.9 ± 0.6 µm/sec, 95.6 ± 0.4%, and 230.3 ± 2.3 sec, respectively), at 30 C (142.0 ± 0.6 µm/sec, 93.6 ± 0.4%, and 238.3 ± 0.9 sec, respectively), and pH 8 (144.8 ± 0.6 µm/sec, 93.3 ± 0.4%, and 234.0 ± 1.5 sec, respectively). Maximum VAP, MOT, and DSM were obtained in each solution containing 0.6 M NaCl (143.8 ± 1.0 µm/sec, 91.3 ± 2.0%, and 230.6 ± 4.2 sec, respectively), 0.6 M KCl (135.1 ± 3.1 µm/sec, 91.1 ± 3.1%, and 230.3 ± 3.7sec, respectively), 0.2M CaCl₂ (105.3 ± 4.7μm/sec, 47.9 ± 2.7%, and 120.7 ± 1.3 sec, respectively), 0.2 M MgCl₂ (107.3 ± 3.0 m/s, 42.1 ± 3.3%, and 120.3 ± 4.8 sec, respectively), and osmolality of 400 mOsm/kg (145.1 ± 2.5 µm/sec, 93.0 ± 2.1%, and 346.5 ± 4.4s, respectively). We used these mediums as artificial insemination media for fertilizing matured eggs. The results showed that the fertilization and hatching rates in 0.6 M NaCl (75.3 ± 0.6% and 57.0 ± 2.4%, respectively), ASW (70.8 ± 1.2% and 51.2 ± 1.8%, respectively), or 400 mOsm/kg (72.9 ± 1.8% and 55.3 ± 1.6%, respectively) were higher than that in seawater (63.9 ± 1.2% and 39.2 ± 3.9%, respectively). In conclusion, using 0.6 M NaCl, ASW, or 400 mOsm/kg as an artificial insemination medium is effective for fertilizing of waigieu seaperch.     

Operating parameters affecting biofloc technology: carbon source,carbon/nitrogen ratio,feeding regime,stocking density,salinity, aeration,and microbial community manipulation

Aquaculture International - The world population continues to increase day by day. Therefore, aquaculture needs to grow in order to response the need for protein foods and to cope with the problem...