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Anne Henderson-Arzapalo Robert L. Colura Anthony F. Maciorowski 《Journal of the World Aquaculture Society》1994,25(2):289-296
Hybridization has been used in aquaculture to produce fish that exhibit improved growth and survival over parent species. Previous studies produced an intergeneric hybrid by crossing female black drum Pogonias cromis with male red drum Sciaenops ocellatus . In the present study, the two parent species and their hybrid were simultaneously cultured in ponds for 9 mo. Two- to three-day-old larvae of each type were initially placed into three separate 0.1 ha ponds. After about 41 d, fingerlings of each type were transferred from the larval culture ponds to six 0.2 ha ponds. Two ponds each received 3,000 black drum, red drum or hybrid fingerlings. Fish were fed a commercial feed and harvested after about 230 d. At harvest, mean weight, mean total length, and production for the hybrids was 190 g, 245 mm, and 10.7 kg/ha/d, respectively; red drum averaged 142 g, 236 mm, and 7.0 kg/ha/d; and black drum averaged 144 g, 214 mm, and 10.6 kg/ha/d. Black drum survival was 94%, red drum survival was 63%, and hybrid survival was 72%. Hybrid growth was more rapid than either parent. A taste panel failed to identify differences in flavor between the three fishes. With similar flavor and faster growth, hybrid drum have potential for commercial mariculture. 相似文献
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Sobiczewski Piotr Keller-Przybyłkowicz Sylwia Lewandowski Mariusz Mikiciński Artur Maciorowski Robert 《European journal of plant pathology / European Foundation for Plant Pathology》2021,161(2):491-492
European Journal of Plant Pathology - A Correction to this paper has been published: https://doi.org/10.1007/s10658-021-02315-7 相似文献
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Whole lupins (Lupinus albus) were roasted with exit temperatures ranging from approximately 130 (moderate heat) to 175 degrees C (high heat). In situ N disappearance after 12 h of incubation in the rumen was 83% for raw lupins, 45% for lupins roasted at moderate temperatures, and 39% for lupins roasted at high temperatures. Lambs fed lupins roasted at moderate temperatures retained more N (P less than .01) than those fed soybean meal (SBM). However, growth rate and feed efficiency were similar among lambs fed diets containing SBM, raw lupins, or roasted lupins. Dehulled lupins commercially roasted at low, moderate, and high temperatures resulted in ruminal in situ N disappearances of 59, 47, and 43% for the respective temperatures. Dehulled lupins (Lupinus albus) were also roasted in a laboratory oven for 2, 4, and 6 h at 120, 140, and 160 degrees C. Simulation of roasting for 2 h had no effect (P greater than .10) on ruminal in situ N disappearance at any of the temperatures. In situ N disappearance was reduced (P less than .05) after roasting for 4 h at 160 degrees C, but acid detergent insoluble N was only moderately increased. Nitrogen retention in lambs fed raw, dehulled lupins was equal (P greater than .10) to that of lambs fed SBM. Whole lupins or dehulled lupins can replace SBM as the sole protein supplement for growing lambs. Although roasting lupins decreased ruminal in situ N disappearance, it had no effect on growth of lambs. 相似文献
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Maciorowski KG Herrera P Jones FT Pillai SD Ricke SC 《Veterinary research communications》2006,30(2):127-137
Food-borne salmonellosis continues to be a major public health concern, and contamination with Salmonella spp. in pre-harvest animal production is considered a primary contributor to this problem. Animal feeds can easily become
contaminated during primary production, feed mixing and processing as well as during feeding. Consequently, monitoring and
surveillance of feeds and feed ingredients for Salmonella spp. contamination may be useful or necessary in the prevention and control of this organism. Cultural and immunological
detection methods for salmonellae have been used or suggested as possible approaches for use in animal feeds. Cultural methods
remain advantageous owing to their ability to detect viable bacterial cells, while immunological methods have the capability
of detecting nonculturable bacterial cells. Advancements and improvements in both methodologies offer opportunities for eventual
routine use of these detection technologies in animal feed assays. 相似文献
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11 samples of oats from the 2005 crop of the field experiment carried out in RSD Lipnik were examined. Naked grain oats were represented by a standard Polar cultivar and 5 strains (STH 6102, STH 6856, STH 7146, STH 7256, STH 1692), whereas husked grains were represented by a standard Bohun cultivar and 4 strains (STH 684, STH 688, STH 729, STH 840). The examined naked grain oats differ considerably from husked grain oats in their chemical composition. A statistically significantly higher content of protein (P ≤ 0.05), a higher level of fat (P ≤ 0.01) and a lower value of crude fibre (P ≤ 0.01) were observed in the grains of naked oats compared with the husked grains. The protein of oats is characterised by a favourable amino acid composition of high quality protein which can be confirmed by the EAAI values. The first amino acid limiting the nutritive value of protein was lysine in nearly all oat samples. The characteristic feature of the Polar cultivar was isoleucine deficit. The positive nutritive values for oat grains, in particular those for naked oat grains, make it possible to use them as food for humans and feed for monogastric animals. 相似文献
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