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1.
A Comparison of the Effects of Two Prey Enrichment Media on Growth and Survival of Pacific Bluefin Tuna,Thunnus orientalis,Larvae 下载免费PDF全文
Maria S. Stein Daniel Margulies Jeanne B. Wexler Vernon P. Scholey Katagiri Ryo Tomoki Honryo Tsukasa Sasaki Angel Guillen Yasuo Agawa Yoshifumi Sawada 《Journal of the World Aquaculture Society》2018,49(1):240-255
Three experiments were conducted to investigate the growth, survival, and standardized cohort biomass of Pacific bluefin tuna, Thunnus orientalis, larvae fed nutritionally enhanced prey during the first week of feeding using two commonly used, commercially available enrichment media, AlgaMac Enrich and Marine Glos. T. orientalis larvae exhibited exponential growth in standard length and dry weight. The daily specific growth rates in length and weight are the first reported for T. orientalis larvae and the averages ranged from 3.8 to 4.1% and 27.5%, respectively, for larvae in the AlgaMac treatment and from 4.1 to 6.1% and 31.5%, respectively, in the Marine Glos treatment. Average daily growth rates in length ranged from 0.16 to 0.23 mm/d for larvae in the AlgaMac treatment and from 0.17 to 0.27 mm/d for those in the Marine Glos treatment. Daily growth rates in length were similar to those reported for other tuna larvae reared in the laboratory but slower than most published estimates for larval tunas in situ at similar water temperatures. Mean prey number per gut was positively associated with mean prey level in the tank. Both enrichment media appear to be good sources of nutritional improvement of planktonic prey for T. orientalis larvae. 相似文献
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Nobumitsu Sasaki Ryuki Shishikura Hiroshi Nyunoya 《Journal of General Plant Pathology》2014,80(3):272-281
During plant infection by tobamoviruses such as Tomato mosaic virus (ToMV), viral replication complexes containing a viral 126-kDa replicase component (126K) are generated, temporarily in association with a viral movement protein (MP) that is indispensable for viral intercellular movement. The tobamovirus 126K protein has been shown to play an important role not only in replication but also in intercellular transport of viral RNAs. Transient expression of the 126K protein has recently been reported to result in formation of cytoplasmic bodies with shapes similar to those of the replication complexes. In this study, to investigate the roles of ToMV MP in the formation, localization, and dynamics of cytoplasmic bodies of the 126K protein, we carried out confocal microscopy studies of fluorescently tagged 126K and MP that were transiently and simultaneously expressed in Nicotiana benthamiana. Without MP expression, 126K was evenly distributed in the cytoplasm, with occasional formation of small 126K bodies. These small 126K bodies moved in the cytoplasmic stream and along the endoplasmic reticulum network. In contrast, co-expression of MP markedly promoted the formation of larger MP-associated 126K bodies, which were generally static but moved occasionally in the cytoplasmic stream. In addition, we found that small, mobile 126K bodies were captured at the terminal part of MP-derived filamentous structures, leading to the formation of 126K-MP complexes and their translocation to another cellular site. 相似文献
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A genetic analysis of meat compositions in Japanese Black cattle: Genetic parameters and sex influence 下载免费PDF全文
A. Onogi S. Sasaki M. Kobayashi A. Ogino T. Nozaki K. Kurogi T. Yasumori K. Togashi H. Iwata 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2017,134(5):373-382
Meat composition in beef is related to eating quality and food functionality. Genetic parameters for several meat compositions including free amino acid, peptide and sugar, however, remain poorly described. In this study, we estimated genetic parameters for 51 meat components, including free amino acids, peptides, sugars and fatty acid compositions, and two carcase traits in 1,354 heifers and 1,797 steers of Japanese Black cattle. Heritability estimates were generally equivalent to or moderately greater than those in previous studies of this breed. Genetic correlations between free amino acids, peptides and sugars and carcase traits were often negative, suggesting a trade‐off between traits. Using two‐trait animal models that treat records from the two sexes as different traits, we estimated sex‐specific heritabilities and cross‐sex genetic correlations which indicate the sex differences in genetic architecture. In these analyses, 12 traits showed significant heritability differences between sexes and cross‐sex genetic correlations occasionally deviated from unity. These results could be used to inform future breeding schemes and investigations of the genetic architecture of meat compositions in beef. 相似文献
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Genetic analysis of fat‐to‐protein ratio,milk yield and somatic cell score of Holstein cows in Japan in the first three lactations by using a random regression model 下载免费PDF全文
Akiko Nishiura Osamu Sasaki Mitsuo Aihara Hisato Takeda Masahiro Satoh 《Animal Science Journal》2015,86(12):961-969
We estimated the genetic parameters of fat‐to‐protein ratio (FPR) and the genetic correlations between FPR and milk yield or somatic cell score in the first three lactations in dairy cows. Data included 3 079 517 test‐day records of 201 138 Holstein cows in Japan from 2006 to 2011. Genetic parameters were estimated with a multiple‐trait random regression model in which the records within and between parities were treated as separate traits. The phenotypic values of FPR increased soon after parturition and peaked at 10 to 20 days in milk, then decreased slowly in mid‐ and late lactation. Heritability estimates for FPR yielded moderate values. Genetic correlations of FPR among parities were low in early lactation. Genetic correlations between FPR and milk yield were positive and low in early lactation, but only in the first lactation. Genetic correlations between FPR and somatic cell score were positive in early lactation and decreased to become negative in mid‐ to late lactation. By using these results for genetic evaluation it should be possible to improve energy balance in dairy cows. 相似文献
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Vitamin D Status in Different Stages of Disease Severity in Dogs with Chronic Valvular Heart Disease 下载免费PDF全文
T. Osuga K. Nakamura T. Morita S.Y. Lim K. Nisa N. Yokoyama N. Sasaki K. Morishita H. Ohta M. Takiguchi 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2015,29(6):1518-1523
Background
In humans with heart disease, vitamin D deficiency is associated with disease progression and a poor prognosis. A recent study showed that serum 25‐hydroxyvitamin D [25(OH)D] concentration, the hallmark of vitamin D status, was lower in dogs with heart failure than in normal dogs, and a low concentration was associated with poor outcome in dogs with heart failure.Objectives
To elucidate the vitamin D status of dogs with chronic valvular heart disease (CVHD) at different stages of disease severity.Animals
Forty‐three client‐owned dogs with CVHD.Methods
In this cross‐sectional study, dogs were divided into 3 groups (14 dogs in Stage B1, 17 dogs in Stage B2, and 12 dogs in Stage C/D) according to ACVIM guidelines. Dogs underwent clinical examination including echocardiography. Serum 25(OH)D concentrations were measured in each dog.Results
Serum 25(OH)D concentration was significantly lower in Stage B2 (median, 33.2 nmol/L; range, 4.9–171.7 nmol/L) and C/D (13.1 nmol/L; 4.9–58.1 nmol/L) than in Stage B1 (52.5 nmol/L; 33.5–178.0 nmol/L) and was not significantly different between Stage B2 and Stage C/D. Among clinical variables, there were significant negative correlations between 25(OH)D concentration and both left atrial‐to‐aortic root ratio and left ventricular end‐diastolic diameter normalized for body weight.Conclusions and Clinical Importance
These results indicate that vitamin D status is associated with the degree of cardiac remodeling, and the serum 25(OH)D concentration begins to decrease before the onset of heart failure in dogs with CVHD. 相似文献7.
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Tran Lanh Danh Phung Luc Duc Pham Dung Viet Pham Dong Duy Nishiyama Masateru Sasaki Atsushi Watanabe Toru 《Paddy and Water Environment》2019,17(3):507-513
Paddy and Water Environment - Two consecutive pilot-scale experiments were conducted to investigate the potential reuse of treated municipal wastewater (TWW) as an irrigation source for cultivating... 相似文献
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Kazumasu Sasaki Tatsushi Mutoh Tomoko Mutoh Ryuta Kawashima Hirokazu Tsubone 《Veterinary anaesthesia and analgesia》2017,44(1):7-16