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排序方式: 共有210条查询结果,搜索用时 62 毫秒
71.
Luis Martínez‐Rocha Julián Gamboa‐Delgado Martha Nieto‐López Denis Ricque‐Marie Lucía Elizabeth Cruz‐Suárez 《Aquaculture Research》2013,44(6):847-859
Stable isotope analyses were applied to explore the relative dietary nitrogen contributions from fish meal and pea meal (Pisum sativum) to muscle tissue of Pacific white shrimp postlarvae (141 ± 31 mg) fed low protein diets having different proportions of both ingredients as the sole dietary protein sources. A negative control diet was formulated to contain 100% pea meal and six more isoproteic diets to have decreasing levels of pea meal‐derived nitrogen: 95%, 85%, 70%, 55%, 40% and 0% of the initial level. Growth rates were negatively correlated to dietary pea protein inclusion due to progressive essential amino acid deficiencies (sulphur amino acids, threonine, lysine, histidine). The nitrogen turnover rate significantly increased in muscle tissue of shrimps fed diets having high levels of pea meal; however, contrary to observations from a previous study using soy protein, the relative contributions of dietary nitrogen from pea meal to shrimp muscle tissue were equal or higher than expected contributions established by the dietary formulations. Results highlight the effectiveness of stable isotope analysis in assessing the nutritional contributions of alternative ingredients for aquaculture feeds and the potential suitability of pea as a source of protein (provided the diets are nutritionally balanced). 相似文献
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Short‐term methionine supplementation during the early post‐partum period in primiparous rabbits improves prolificacy associated with an increase in serum concentrations of IGF‐I
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Z. B. Lopéz‐Cedillo A. M. Rosales‐Torres G. D. Mendoza Y. Heuze A. E. Ávila‐Espítia A. Guzmán 《Journal of animal physiology and animal nutrition》2017,101(5):e394-e403
The aim of this study was to evaluate the effects of methionine supplementation on energy metabolism and reproductive performance during the early post‐partum period in primiparous does. Forty nulliparous New Zealand White does were used. Females were randomized in two groups at calving: the control group (n = 20) was fed with the basal diet, and the methionine group (n = 20) was fed the basal diet plus 1 g/animal/day of methionine from the day of calving to 4 days post‐partum. Results showed that methionine supplementation increased (p = 0.032) the concentration of insulin‐like growth factor‐1 with respect to control group 4 days post‐partum. It similarly increased the prolificacy (p = 0.03), the number of kits born alive per litter (p = 0.06) and the body gain weight of the litter during supplementation (p = 0.035). These results were observed despite the does in the methionine group having a deeper negative energy balance than the does in the control group. Finally, methionine supplementation did not affect receptivity (p = 0.23), fertility (p = 0.49), the number of kits born dead per litter (p = 0.86) insulin and metabolites as glucose, non‐esterified fatty acids and triglycerides. In conclusion, our results show that methionine supplementation during the first 4 days of the post‐partum period in rabbits increases total litter size and the corporal weight of kits and is associated with an increase in blood concentration of IGF‐1. 相似文献
76.
Enhancement of reproductive performance in shrimp Litopenaeus vannamei (Boone, 1931) by supplementation of Ulva clathrata meal in maturation diet in two commercial hatcheries
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Diana Cristina Corral‐Rosales Elena Palacios Denis Ricque‐Marie Lucia Elizabeth Cruz‐Suárez 《Aquaculture Research》2018,49(2):1053-1059
The effect of supplementing dehydrated seaweed Ulva clathrata (20 g/kg) in the squid fraction of a formulated fresh diet on the reproductive performance of Litopenaeus vannamei broodstock was evaluated in two commercial hatcheries (A and B). The origin of broodstock, use of ablation on females, tank/culture conditions (for maturation, spawning, and larval rearing) were different between hatcheries. Daily mortality was higher (p < .01) for females in the control group compared to Ulva‐fed group of hatchery A, where females were ablated. No differences in mortality were found for unablated females in hatchery B, or with males from either hatchery. In hatchery A, broodstock fed Ulva produced more eggs (an increase in +5% compared to control, p < .05) and nauplii per female (+18%, p < .01). In hatchery B, broodstock fed Ulva produced significantly more eggs (+26%, p < .05) and nauplii per day (+33%, p < .05). In hatcheries A and B, eggs from broodstock fed Ulva had increased hatching rates (+13 and +7%, respectively, p < .001 in both cases). The number of spawns per day had a tendency to be higher in broodstock fed Ulva in both hatcheries, but the difference did not reach statistical significance (+14% for hatchery A and +20% for hatchery B). Dehydrated U. clathrata appears therefore as a functional additive in L. vannamei maturation diets that enhances the reproductive performance at commercial scale, regardless of the management conditions. 相似文献
77.
Alonso G.P. Guedes Caitlin C. Tearney Alessia Cenani Fabio Aristizabal Jorge Nieto 《Veterinary anaesthesia and analgesia》2017,44(2):273-280
Objective
To compare postanesthetic xylazine and dexmedetomidine on recovery characteristics from sevoflurane anesthesia in horses.Study design
Randomized, crossover study.Animals
Six geldings, mean ± standard deviation (SD) (range), 17 ± 4 (11–24) years and 527 ± 80 (420–660) kg.Methods
Horses were anesthetized with sevoflurane for 60 minutes under standardized conditions for a regional limb perfusion study. In recovery, horses were administered either xylazine (200 μg kg?1) or dexmedetomidine (0.875 μg kg?1) intravenously. Recoveries were unassisted and were video-recorded for later evaluation of recovery events and quality by two individuals unaware of treatment allocation. Recovery quality was assessed using a 100 mm visual analog scale (VAS) (0 = poor recovery, 100 = excellent recovery), the Edinburgh Scoring System (ESS) (0–100; 100 = excellent recovery) and the mean attempt interval (MAI) (longer = better). Data are mean ± SD.Results
All recovery quality assessments (xylazine and dexmedetomidine, respectively: VAS: 71 ± 21 mm, 84 ± 13 mm; ESS: 65 ± 22, 67 ± 30; MAI: 52 ± 24 minutes, 60 ± 32 minutes) and events (first limb movement: 37 ± 8 minutes, 42 ± 10 minutes; first attempt to lift head: 44 ± 12 minutes, 48 ± 9 minutes; first attempt to sternal posture: 57 ± 28 minutes, 50 ± 7 minutes; number of head bangs: 2.0 ± 3.0, 0.5 ± 0.5; time to first attempt to stand: 72 ± 6 minutes, 78 ± 13 minutes; time to standing: 79 ± 14 minutes, 84 ± 13 minutes) did not differ significantly between treatments (p > 0.05).Conclusions and clinical relevance
Recovery characteristics did not differ significantly between postanesthetic xylazine and dexmedetomidine following 1 hour of sevoflurane anesthesia in horses in this study. Further evaluations in more horses and in younger horses are required to confirm these results. 相似文献78.
79.
Charles Gregory Lutz Alvaro M Armas‐Rosales Arnold M Saxton 《Aquaculture Research》2010,41(11):e770-e780
Six tilapia varieties were used in two 6 × 6 diallel crosses. Salinity was increased in daily increments of 7 g L?1 in five replicate trials to estimate the salinity tolerances of 2205 F1 juveniles from parental varieties and their reciprocal crosses. Genetic effects potentially influencing salinity tolerance were estimated, including line effects, maternal effects, reciprocal and specific reciprocal effects, direct heterosis, specific combining abilities (SCAs) and general combining abilities (GCAs). The mean heterosis, , for salinity tolerance was 4.46 g L?1 (P<0.01). The average mean salinity tolerance (MST) of the parental varieties was 35.2 g L?1, and yet, MSTs above 36 g L?1 were found in 21 of 34 variety crosses produced. In some instances, maternal effects offset line effects, while in others, these influences were complementary. Ten variety combinations exhibited significant (P<0.05) or highly significant (P<0.01) direct heterosis, and SCAs were significant (P<0.05) or highly significant (P<0.01) in five combinations. Reciprocal and specific reciprocal effects also influenced the salinity tolerance in some variety combinations. Direct line effects generally reflected MST rankings. The variance of cross means was 30.1% due to variety GCAs (primarily additive effects) and 69.9% due to SCAs (primarily dominance effects). 相似文献
80.
López Peña M Muñoz F Alemañ N González A Pereira JL Nieto JM 《Veterinary pathology》2005,42(4):489-491
A 6-month-old female German Shepherd Dog died as a result of profuse oral bleeding. At postmortem examination, the oral cavity showed visible roots of the right mandibular fourth premolar and first molar teeth and, in addition, they were very mobile and compressible. Radiographs showed a generalized radiolucency in the body of the right mandible, with evidence of resorption of the affected alveolar bone. Histologically, the lesion of the right mandible was characterized by the lysis of bony structures and a non-malignant proliferation of blood-filled vascular spaces lined by a single layer of well-differentiated endothelial cells. The clinical, radiographic, and histologic presentation of this dog is consistent with that associated with Gorham-Stout disease, a rare bone disorder in humans. 相似文献