Comparison of Arthroscopic Lavage and Needle Lavage Techniques,and Lavage Volume on the Recovery of Colored Microspheres From the Tarsocrural Joints of Cadaver Horses          下载免费PDF全文

Patrick G. Loftin  Warren L. Beard  Megan E. Guyan  Brad J. White 《Veterinary surgery : VS》2016,45(2):240-245

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The age-old question of researcher innovation     

Wray KB 《Science (New York, N.Y.)》2007,318(5856):1549-50; author reply 1549-50

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The consequences of differential family survival rates and equalizing maternal contributions on the effective population size (Ne) of cultured silver‐lipped pearl oysters,Pinctada maxima     

Curtis E Lind  Brad S Evans  Joseph J U Taylor  Dean R Jerry 《Aquaculture Research》2010,41(8):1229-1242

The effective population size (N_e) is a critical gauge of how efficiently an aquaculture operation is capturing or maintaining genetic diversity and can govern the long‐term success of genetic selection programmes. In communally reared pearl oysters (Pinctada maxima), high variance in family sizes is a significant contributor towards low N_e and its severity may be compounded by differential survival rates of individual families. To determine the effect of variable survival on N_e in cultured P. maxima, families from two commercial populations were analysed using DNA parentage analyses to monitor survival and changes in relative contributions. Significant shifts in relative contributions were observed between 72 days and 18 months of age in both commercial cohorts (P<0.001). Survival rates were found to be highly variable among families (ranging from 2.5% to 49.5%) when reared in a common environment. Additionally, we investigated whether equalizing maternal family sizes before communal rearing will reduce family size variance, and increase N_e, compared with stocking at naturally produced proportions. Family equalization (E) significantly improved N_e (P=0.013) compared with rearing at natural (N) proportions (E: N_e=7.18±0.34; N: N_e=5.60±0.15); however, this practice may unintentionally magnify negative influences of poor performing families if survival is correlated with other commercially important traits. It is concluded that highly variable family survival will affect N_e in communally reared P. maxima, and the practice of equalizing family sizes in order to maximize N_e may only become consistently beneficial once further progress is made towards understanding, and then reducing variation in family survival rates.  相似文献   

Psychology. The effects of media violence on society     

Anderson CA  Bushman BJ 《Science (New York, N.Y.)》2002,295(5564):2377-2379

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Ground-based spectral reflectance measurements for evaluating the efficacy of aerially- applied glyphosate treatments     

Huihui Zhang  Yubin Lan  Ronald Lacey  W. Clint Hoffmann  Daniel E. Martin  Brad Fritz  Juan Lopez Jr. 《Biosystems Engineering》2010,107(1):10-15

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Rio+20. Science for sustainable development     

Wible B 《Science (New York, N.Y.)》2012,336(6087):1396

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Addendum     

Brad Geary  D. A. Johnson  T. Cummings  T. Cummings  J. S. Miller 《American Journal of Potato Research》1996,73(12):638-638

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Inhibition of a Hevea brasiliensis protease by a Kazal-like serine protease inhibitor from Phytophthora palmivora     

Dutsadee Chinnapun  Miaoying Tian  Brad Day  Nunta Churngchow 《Physiological and Molecular Plant Pathology》2009,74(1):27-33

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Correlation Between Two Size Classes of Pacific White Shrimp Litopenaeus vannamei and Its Potential Implications for Selective Breeding Programs     

Brad J.  Argue  Steve M.  Arce Shaun M.  Moss 《Journal of the World Aquaculture Society》2000,31(1):119-122

Abstract.— The correlation between market weight (20–25 g) and broodstock weight (> 35 g) in Pacific white shrimp Litopenaeus vannamei has not been determined. Breeders may assume that the largest brood-stock shrimp were also the largest market shrimp. In this study, 120 market shrimp were individually tagged and grown to broodstock in an earthen pond. There was a significant relationship between market and broodstock weight ( P < 0.001) but it was not highly correlated ( r = 0.42). There was no correlation between market weight and post-market weight gain ( P = 0.477; r = 0.08). Of the largest 20 broodstock, only seven were among the top 20 at market weight. If the goal of a breeding program is to select the fastest growing individuals to market, shrimp should be individually selected at market weight and not as broodstock.  相似文献   

Effects of Seasonal Variations, Thyroid and Steroid Hormones, and Carp Pituitary Extract on the Artificial Production of Channel Catfish Ictalurus punctatus× Blue Catfish I. furcatus Hybrids     

Dayton M.  Lambert  Brad J.  Argue Zhanjiang  Liu  Rex A.  Dunham 《Journal of the World Aquaculture Society》1999,30(1):80-89

The primary objective was to compare thyroid hormones and levels of carp pituitary extract for the artificial production of female Ictalurus punctatus × male I. furcatus hybrid catfish. The effects of different carp pituitary extract dosage rates (5, 6, 9, and 10 mg/kg), carp pituitary extract (6 and 10 mg/kg) supplemented with the thyroid hormones thyroxine (T₄) and triiodothyronine (T₃), or pregnenolone (DHP) were determined for inducing ovulation of female channel catfish, fertilization of channel catfish eggs with male blue catfish sperm, and hatching rate of these embryos. Hormone treatments thyroxine and tri-iodothyronine with carp pituitary extract, carp pituitary extract alone, and pregnenolone with carp pituitary extract used to artificially produce hybrid catfish were not different in terms of ovulation rates, eggs/kg, fry/kg body weight of female channel catfish, fertilization rates, or hatching rates (P > 0.05). These findings suggest that lower amounts of carp pituitary extract may be used to induce spawn of female channel catfish for production of channel-blue catfish hybrids and the addition of thyroid and steroid hormones is ineffective at the rates used in this study.  相似文献