共查询到20条相似文献，搜索用时 312 毫秒
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Tai-Cheol Kim 《Fisheries Science》2010,76(4):547-547
Obituary
In Memoriam: Professor Akira Kawai (1926–2010) 相似文献3.
Hisatsugu Wakabayashi 《Fisheries Science》2009,75(5):1077-1077
Obituary
In Memoriam: Professor Akio Kanazawa (1930–2009) 相似文献4.
Shozo Irino 《Fisheries Science》2011,77(3):289
Obituary
In Memoriam: Professor Michizo Suyama (1923–2011) 相似文献5.
The food sources of the main economic animals and trophic levels of biotic communities from an optimized culture model (Rhopilema–Sinonovacula constricta–Paralichthys olivaceus–Penaeus chinensis) in a sea water pond in Donggang, Liaoning province were studied using the stable carbon and nitrogen isotopes technique. The results indicated that the values of δ13C range from (?27.28 ± 0.35) ‰ to (?16.65 ± 0.20) ‰ and the values of δ15N range from (3.68 ± 0.23) ‰ to (13.91 ± 0.26) ‰, both of which exhibited significant fluctuations. The δ13C values of P. chinensis, Macrobrachium mipponensis and P. olivaceus were comparatively higher than those of other aquaculture animals, and the δ15N values of P. olivaceus was also comparatively higher. The contribution to the food sources of aquaculture animals (Rhopilema, S. constricta, P. olivaceus and P. chinensis) was analyzed by using the IsoSource software. The results indicated that fish meat had the greatest contribution to Rhopilema, S. constricta and P. chinensis; P. chinensis had the greatest contribution to P. olivaceus, followed by the M. mipponensis. The trophic level of the biotic communities under that optimized culture model in a sea water pond was 3.54, in which P. olivaceus was in the fourth level (3.54); P. chinensis, Synechogobius hasta, Ablennes anastomella, M. mipponensis, Ditrema temmincki Bleeker, Chelon haematocheilus were in the third trophic levels; Rhopilema, Engraulis japonius, S. constricta and zooplankton (1.00) in the second trophic levels, suspended matters (0.15) including phytoplankton, bacteria, humus, etc., were in the primary trophic levels. 相似文献
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Abdullahi Iliyasu Zainal Abidin Mohamed Mohd Mansor Ismail Amin Mahir Abdullah Salleh Mohamed Kamarudin Hashim Mazuki 《Aquaculture Economics & Management (Blackwell Science)》2013,17(3):221-247
Most research works on the production frontier in aquaculture focus on efficiency measurement using either Stochastic Production Frontier (SPF) or Data Envelopment Analysis (DEA). The studies on productivity growth in aquaculture were limited, perhaps due to lack of time-series data. Nevertheless, total factor productivity analysis (TFP) in fish farms has started gaining popularity in recent years. In addition, the majority of the efficiency studies have centered on technical efficiency analysis but substantial increases in the output levels can be fully realized through improving overall economic efficiency. Therefore, this review suggests that future research should estimate all three efficiency indices (i.e., technical, allocative and economic efficiencies). 相似文献
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Rathinam R. Bharathi Iburahim S. Abuthagir Ramanan S. Suresh Tripathi Gayatri 《Aquaculture International》2022,30(1):341-363
Aeromonas spp are the most common devastating fish bacterial pathogens associated with a wide range of cultured freshwater fish resulting in mass mortality. The present study plots the Aeromonas research output in fish during 1998–2020 by means of the Web of Science (WoS) database. A total of 1944 publications were used for this investigation to evaluate the scientific productivity in this selected subject area. Global publication share, rank, and its development in terms of research and bibliometric indices such as overall citations, h-index, and average citation per paper were also analysed. China ranked first in terms of total publications among the most productive countries and accounted for 26.18% of the total publications. The network visualisation map revealed that the lead collaborating country was China; however, the collaboration between countries was found to be very less. Lokta’s law was noticed not to be valid for Aeromonas research. The study showed that the funding granted to the research investigations and their research productivity in terms of total publications were correlated positively. The results of the current study displayed the trend of “Aeromonas infection in fish” related research investigations published during 1998–2020. This study also highlighted the focused research areas on this topic on which the future areas of research can be determined by fellow researchers in this specific field. This study also suggests enhancing the research efforts on this bacterial pathogen which has the potential to implicate huge economic loss to the fish farming population in the world.
相似文献12.
《渔业科学进展》2016,(3)
为探寻大鲵(Andrias davidianus)的适宜投饵率,在水温为18–19℃、p H为8.0和溶氧为6.0 mg/L的工厂化养殖条件下,用鲜饵分别投喂了2、3、4和5龄大鲵各60 d。比较了各实验组体重增加量、全长增加量、饵料系数、平均增重率、特定生长率和饵料转化率等生长指标。结果显示,2龄大鲵的投饵率为2.0%时,其饵料系数均显著低于投饵率为1.7%、2.6%、2.9%的组,其平均增重率和饵料转化率均显著高于投饵率为1.7%、2.3%、2.6%、2.9%的组,其特定生长率均显著高于投饵率为1.7%、2.6%的组(P0.05);3龄大鲵的投饵率为2.2%时,其饵料系数均显著低于投饵率为1.9%、2.5%、2.8%的组,其平均增重率和特定生长率均显著高于投饵率为1.6%、1.9%、2.5%、2.8%的组,其饵料转化率均显著高于投饵率为2.5%、2.8%的组(P0.05);4龄大鲵的投饵率为2.3%时,其饵料系数均显著低于投饵率为1.7%、2.0%、2.9%的组,其平均增重率和特定生长率均显著高于投饵率为1.7%、2.0%、2.9%的组,其饵料转化率均显著高于投饵率为1.7%、2.9%的组(P0.05);5龄大鲵的投饵率为2.5%时,其饵料系数显著低于投饵率为1.9%的组,其平均增重率和特定生长率均显著高于投饵率为1.9%、2.2%、2.8%、3.1%的组,其饵料转化率均显著高于投饵率为2.2%、2.8%、3.1%的组(P0.05)。为使大鲵的饵料系数较低,平均增重率、特定生长率和饵料转化率较高,研究表明,2、3、4和5龄大鲵的适宜投饵率分别为2.0%、2.2%、2.3%、2.5%;随着大鲵年龄的增加,适宜投饵率呈逐渐增加的变化规律,关系式为y=0.000212x+2.07(r~2=0.8797)。 相似文献
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S. Murali K. Sathish Kumar P. V. Alfiya D. S. Aniesrani Delfiya Manoj P. Samuel 《Journal Of Aquatic Food Product Technology》2019,28(5):541-554
The aim of the study was to investigate the drying kinetics and quality characteristics of Indian mackerel dried under solar–electrical hybrid dryer (S-EHD). Fresh Indian mackerel fishes (Rastrelliger kanagurta) were cleaned, cut into butterfly fillets, and salted overnight using a dry salting method (salt-to-fish ratio, 1:3). The salted mackerel was dried in a S-EHD at the air temperature of 45–55°C, relative humidity of 47–62%, and air velocity of 0.60–0.80 m/s. Open sun drying (OSD) of salted Indian mackerel was conducted to compare with S-EHD. The moisture content of the salted mackerel (61.5% w.b.) was reduced to 31.8% (w.b.) under S-EHD and 30.25% (w.b) under OSD in 8 and 32 h, respectively. The drying rate curve showed that mackerel drying occurred under falling-rate drying period in both the drying methods. A drying efficiency of 23.81% was observed for salted Indian mackerel drying under S-EHD. Diffusion approach and two-term models were selected to accurately predict the drying behavior of mackerel under S-EHD and OSD, respectively. Total volatile base nitrogen (TVB-N), trimethylamine, and thiobarbituric acid analysis of dried samples revealed that the mackerel dried under S-EHD was better than OSD. In the sensory analysis, samples dried under S-EHD recorded highest overall acceptability score. 相似文献
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《水生生物资源》2000,13(2):115-120
Pirapatinga given submaximal rations grow faster when fed at night than when fed during daylight hours. It was hypothesised that these fish were day–night conformers, with a nocturnal acrophase, and expended more energy during daytime feeding. In order to test this hypothesis, telemetry was applied to study the behaviour of cultured pirapatinga (stocking biomass of 40 kg·m–3; 27 ± 1 °C; 6 mg O2·L–1; 13.5 L/10.5 D) under three feeding schedules (diurnal versus nocturnal feeding [12 g·d–1·fish–1 over 10 h] versus fasting) that were evaluated in succession over 1 week each. This implied a feasibility study to test the adequacy of tagging fish with surgically implanted transmitters (ventrolateral incision, posterior to the pelvic girdle). There was no mortality or tag loss over 12 months following surgery, and abdominal incisions healed within 4 weeks. Under all three feeding schedules, activity increased at dawn, peaked during daytime, decreased at twilight and reached a minimum during the late night. Diurnal and twilight activity levels were similar under all three schedules, whereas nocturnal activity was significantly lower with daytime feeding. These observations indicate that pirapatinga have a diurnal activity acrophase, which is little influenced by food availability, and imply that the higher growth of fish fed at night does not originate from lower energetic expenditures. 相似文献
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Daniela Denk Ranieri Verin Lorenzo Ressel Eleanor Lewis Mark F Stidworthy 《Journal of fish diseases》2020,43(8):929-939
Syngnathidae (seahorses, pipefish and seadragons) are charismatic species commonly kept in commercial aquaria, but published literature on syngnathid diseases is limited and immunohistochemical techniques not routinely employed. A retrospective review of 2,541 syngnathid submissions received between March 2003 and October 2016 identified 18 neoplasms including germ cell tumours, exocrine pancreatic and intestinal carcinomas, chromatophoromas, and single cases of lymphoma, thyroid and renal carcinoma, swim bladder and pituitary adenoma. Big-bellied seahorses accounted for 19% of submissions, but 50% of neoplasms were diagnosed in this species. This study includes the first reported cases of germ cell tumours, chromatophoroma, thyroid carcinoma and pituitary adenoma in Syngnathidae and the first reports of neoplasia in pipefish species. Out of nine commercial antibodies trialled for immunohistochemical characterization of neoplastic tissue, only pan-cytokeratin proved cross-reactive. Electron microscopy was performed in four cases. Tumours should be considered as differential diagnosis in cases with buoyancy issues, debilitated or emaciated animals, and may predispose to secondary infections. This study highlights the value of histopathological disease surveillance for commercial aquarium settings. 相似文献
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为研究草鱼(Ctenopharyngodon idella)–鳙(Aristichthys nobilis)–鲫(Carassius carassius)零换水池塘营养盐收支状况,阐明其零换水机制,以草鱼–鳙–鲫零换水池塘为实验组,以草鱼–鳙–鲫常规换水池塘为对照组,开展了为期2年的池塘有机碳(TOC)、氮(N)、磷(P)收支的研究。结果显示,2组池塘TOC、N、P的主要来源均为饲料投入,分别为77.06%和81.00%,92.08%和92.77%,94.18%和95.63%;TOC、N、P的主要输出途径均为底泥积累,分别占输入营养盐的43.32%和22.10%,61.40%和52.82%,78.71%和79.58%。2组池塘养殖鱼类收获分别占输入碳(C)、N、P的10.08%和13.05%,21.00%和25.57%,15.41%和18.60%。零换水池塘的C、N、P水体积累量和积累率均显著低于常规池塘(P<0.05),其积累率分别降低92.91%、88.52%和87.12%。零换水池塘的N、P底泥积累量显著高于常规池塘,但C、N底泥积累率显著低于常规池塘(P<0.05),分别降低了48.99%和13.97%。零换水池塘养殖鱼类的C、N、P利用率均显著高于常规池塘(P<0.05),分别提高了29.49%、21.72%和20.65%。研究表明,零换水模式能降低营养盐积累,有效提高系统物质利用率,是一种绿色高效养殖模式,具有较好的推广价值。 相似文献
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Xian Li Jean-Paul Blancheton Ying Liu Sebastien Triplet Luigi Michaud 《Aquaculture International》2014,22(4):1263-1282
The direct impact of oxidation–reduction potential (ORP) on fish welfare and water quality in marine recirculating aquaculture systems (RAS) is poorly documented. In this study, the effects of the fish size (S1, S2, S3) and ORP level (normal, four successive levels) on the performance of European sea bass (Dicentrarchus labrax) were investigated. Three size fish were distributed into two RAS (RAS and RAS O3). Ozone was injected into RAS O3 to increase the ORP level. The ORP was stabilized to four successive levels: 260–300, 300–320, 320–350, and 300–320 mV in fish tanks during four periods (P1–4). At the last day of each period, the hematological parameters, plasma protein and mortality of sea bass were analyzed. Two-way ANOVA revealed that several hematological parameters, including pH, hematocrit, concentrations of oxygen, carbon dioxide, glucose (Glu), ionized calcium, kalium, and hemoglobin, were significantly influenced by the increased ORP levels over the experimental period. The alteration in blood Glu and plasma protein concentration showed that ORP around 300–320 mV started to stress sea bass. Once the ORP exceeded 320 mV in the tanks during the P3 period, mortality occurred even when total residual oxidants/ozone-produced oxidants was only 0.03–0.05 mg L?1 in the fish tanks. At the same time, plasma protein decreased notably due to appetite depression. After the decrease in ORP during the P4 period, mortality continued. In conclusion, the results strongly suggest that for European sea bass in RAS, the ORP should not exceed 320 mV in the tanks. Once ozonation damaged fish, the effect seemed to be irreversible. However, how ORP affected related hematological parameters still need the further investigations. 相似文献
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为探寻大鲵(Andrias davidianus)的适宜投饵率,在水温为18-19℃、pH为8.0和溶氧为6.0 mg/L的工厂化养殖条件下,用鲜饵分别投喂了2、3、4和5龄大鲵各60 d.比较了各实验组体重增加量、全长增加量、饵料系数、平均增重率、特定生长率和饵料转化率等生长指标.结果显示,2龄大鲵的投饵率为2.0％时,其饵料系数均显著低于投饵率为1.7％、2.6％、2.9％的组,其平均增重率和饵料转化率均显著高于投饵率为1.7％、2.3％、2.6％、2.9％的组,其特定生长率均显著高于投饵率为1.7％、2.6％的组(P＜0.05);3龄大鲵的投饵率为2.2％时,其饵料系数均显著低于投饵率为1.9％、2.5％、2.8％的组,其平均增重率和特定生长率均显著高于投饵率为1.6％、1.9％、2.5％、2.8％的组,其饵料转化率均显著高于投饵率为2.5％、2.8％的组(P＜0.05);4龄大鲵的投饵率为2.3％时,其饵料系数均显著低于投饵率为1.7％、2.0％、2.9％的组,其平均增重率和特定生长率均显著高于投饵率为1.7％、2.0％、2.9％的组,其饵料转化率均显著高于投饵率为1.7％、2.9％的组(P＜0.05);5龄大鲵的投饵率为2.5％时,其饵料系数显著低于投饵率为1.9％的组,其平均增重率和特定生长率均显著高于投饵率为1.9％、2.2％、2.8％、3.1％的组,其饵料转化率均显著高于投饵率为2.2％、2.8％、3.1％的组(P＜0.05).为使大鲵的饵料系数较低,平均增重率、特定生长率和饵料转化率较高,研究表明,2、3、4和5龄大鲵的适宜投饵率分别为2.0％、2.2％、2.3％、2.5％;随着大鲵年龄的增加,适宜投饵率呈逐渐增加的变化规律,关系式为y=0.000212x+2.07 (r2=0.8797). 相似文献
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Ouyang Xu Gao Jiancao Chen Bojian Wang Zaizhao Ji Hong Plath Martin 《International Aquatic Research》2017,9(2):141-151
International Aquatic Research - A considerable body of the literature considers the potential impact of exotic predators on native prey organisms, while comparatively, few studies have asked... 相似文献
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Dipeptidyl peptidase-4 (DPP4) is a serine protease of great interest because it has been shown to modulate the activity of several peptidergic factors including peptide YY (PYY) and glucagon-like peptide-1/2. While PYY(1–36) is orexigenic in mammals, PYY(3–36) recently garnered interest as a potent anorexigen. In silico phylogenetic analysis found that the DPP4 cleavage sites are absent in fish PYY sequences. However, no studies were conducted to show that indeed PYY(3–36) is not produced by DPP4 in fish. If DPP4 does not cleave PYY(1–36), is PYY(3–36) an anorexigen in fish? The objectives of this research were to (1) test whether DPP4 cleaves goldfish PYY(1–36) and (2) determine whether PYY(3–36) is an anorexigen in goldfish. First, we identified the highly conserved catalytic region of DPP4 in goldfish. Abundant expression of DPP4 mRNA was found within the gastrointestinal tract. We also report the first MALDI-MS cleavage analysis of DPP4 effects on PYY(1–36) in a non-mammalian vertebrate. Our novel results indicate that DPP4 is unable to cleave goldfish PYY(1–36) to PYY(3–36) in vitro. It also confirms a previously held hypothesis that DPP4 is unable to cleave fish PYY(1–36) that contains N-terminal proline–proline residues. PYY(3–36) had no effects on food intake of goldfish. The appetite inhibitory effects of intraperitoneal and intracerebroventricular injections of 10 ng/g body weight gfPYY(1–36) were abolished by coinjections of BIBP3226, a Y1 receptor antagonist. These results are significant because it shows the lack of generation of endogenous PYY(3–36) and its anorectic effects in goldfish. 相似文献