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| Registros recuperados: 54 | |
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| Farias, Gustavo Duarte; Cerdótes, Liliane; Restle, João; Pascoal, Leonir Luiz; Costa, Pablo Tavares; Ferreira, Otoniel Geter Lauz; Vaz, Ricardo Zambarda. |
| This study was developed to evaluate productive efficiency during the lactation period of cows with predominant Nellore genetic composition based on their body size. Cows were divided into the following categories: light (≤ 316 kg), moderate (≥ 317 and ≤ 400 kg), or heavy (≥ 401 kg). Body weight change and total gain from birth to 210 days of age of calves born from heavy cows (0.155±0.03 and 111.6±5.1 kg) were higher than those of calves born from light (0.064±0.03 and 91.0±4.3 kg) and moderate (0.144±0.03 and 97.7±4.0 kg) cows. Calf production index differed (p < 0.05) with the herd of heavy cows (93.5±3.2 kg), producing 57.4 and 19.7% more kilograms of calf than light (59.4±2.7 kg) and moderate (78.1±2.4 kg) cows, respectively. Heavy Nellore cows... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Weaning; Calf production; Lactation; Production per area.. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/42532 |
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| Santos,S.A.; Valadares Filho,S.C.; Detmann,E.; Ruas,J.R.M.; Prados,L.F.; Mariz,L.D.S.. |
| The purpose of this study was to evaluate feed intake and develop lactation and weight change curves for Holstein x zebu cows under grazing. Eighteen F1 cows were used, divided into three treatments; 6 were Holstein x Gir (HGI), 6 were Holstein x Guzerat (HGU), and another 6 were Holstein x Nelore (HNE), under the feeding conditions of pasture plus concentrate with 22% of crude protein (CP). To estimate individual feed intake at pasture, 2 markers were used: titanium dioxide to estimate fecal dry matter (DM) excretion, and the indigestible acid detergent fiber (iADF) to estimate individual pasture intake. The Wood (1967) model was used to evaluate milk yield and the parameters were estimated for each genetic group, as follows: HGI =... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crossbreeding; F1; Lactation; Tropical grasses. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352014000300827 |
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| Surek,D.; Almeida,L.M.; Panisson,J.C.; Krabbe,E.L.; Oliveira,S.G.; Alberton,G.C.; Maiorka,A.. |
| ABSTRACT This study evaluated the effect of birth weight and weight gain during the suckling phase on the piglet daily weight gain during the nursery phase (21-61 days of age). Piglets (n= 534) derived from 55 first-parity sows were weighed at birth, weaning, and end of the nursery phase. The data were analyzed according to a completely randomized experimental design, with three classes of birth weight (BW) and two classes of weight gain during the suckling phase (SDWG). High BW and low SDWG piglets were 0.2kg lighter at weaning than low BW and high SDWG animals (P< 0.05). However, at the end of the nursery phase, this situation was inverted, with high BW and low SDWG piglets 2.20kg heavier (P< 0.05). Low BW and high SDWG piglets were heavier at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pigs; Compensatory gain; Lactation; Primiparous. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000602034 |
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| Gagliostro,G.A.; Patiño,E.M.; Sanchez Negrette,M.; Sager,G.; Castelli,L.; Antonacci,L.E.; Raco,F.; Gallello,L.; Rodríguez,M.A.; Cañameras,C.; Zampatti,M.L.; Bernal,C.. |
| The aim of the study was to examine the changes in milk fatty acid (FA) profile of grazing buffaloes fed either low (L, 276g/d) or high (H, 572g/d) doses of a blend (70:30, wt/wt) of soybean and linseed oils. Fourteen multiparous Mediterranean buffaloes grazing on a native pasture were fed 4 kg/day of a commercial concentrate containing no supplemental oil over a pre-experimental period of ten days. The baseline milk production and composition and milk FA profile were measured over the last three days. After this pre-experimental period the animals received the same concentrate added with either the L or H oil doses for 26 additional days. Milk yield (g/animal/day) did not differ at the start (1776 ± 522 and 1662 ± 291 for L and H, respectively,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Buffaloes; Conjugated linoleic acid; Lactation; Soybean oil; Linseed oil. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352015000300927 |
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| Silva,L.M.; Oliveira,C.H.A.; Silva,A.M.; Montenegro,A.R.; Fernandes,C.C.L.; Silva,C.M.G.; Rossetto,R.; Rondina,D.. |
| ABSTRACT This study evaluated the effect of detoxified castor meal on the reproductive performance, metabolic stress, milk production, and kid development in peripartum goats. The diet of the animals were with (DCM, n= 20) or without (WDCM, n= 21) detoxified castor meal during the entire gestation and until weaning, 60 days post-birth. No differences were observed in the gestation period, litter size, rate of multiple births, and mortality between the two groups. The postpartum plasma concentrations of progesterone remained below 1ng/mL in all animals, thus, confirming the absence of active corpora lutea. The thickness of sternum adipose tissue and loin area, levels of urea and cholesterol, milk production, and daily weight gain in the kids were low in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ricinus communis L; Postpartum; Lactation; Goat kids; Progesterone. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352020000100136 |
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| Silva,M.O.; Ribeiro Filho,J.D.; Dantas,W.M.F.; Valente,F.L.; Ribeiro,B.M.; Ermita,P.A.N.; Monteiro,L.C.; Costa,C.M.; Silva,G.M.M.; Alves,S.R.; Avanza,M.F.B.; Santos,P.V.M.; Manso Filho,H.C.. |
| ABSTRACT The present study aimed to evaluate the effects of the transition period on hematological and biochemical constituents in Mangalarga Marchador mares. Forty-eight mares were used to form a maintenance group (MG) and transition group (TG), formed by pregnant mares and, after delivery, infants. Blood samples were collected at the following times: T-60 (60 d pre-delivery), T-30 (30 d pre-delivery), T-15 (15 d pre-delivery), T0 (first 6h post-delivery), T15 (15 d post-delivery), T30 (30 d post-delivery), and T60 (60 d post-delivery). The TG had lower values (P< 0.05) of red blood cells, hematocrit and hemoglobin at T0, T15, T30 and T60 times than MG. The mean corpuscular volume was lower in MG (P< 0.05) than in TG (T0, T15, T30 and T60) and mean... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Equine; Blood count; Lactation; Pregnancy; Peripartum. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000601765 |
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| AZARA,CÍNTIA R.P; MAIA,INGRID C; RANGEL,CAROLINA N; SILVA-NETO,MÁRIO A.C; SERPA,RENATA F.B; DE JESUS,EDGAR F.O; TAVARES DO CARMO,MARIA G; FIALHO,ELIANE. |
| Lactating Wistar rats were fed a liquid diet containing either ethanol [ethanol-fed group (EFG)] or an isocaloric amount of carbohydrate [pair-fed group (PFG)] from day 1 postpartum up to day 14 of lactation, to investigate micro/macronutrient milk composition and the mineral status of pups. EFG presented a reduction of daily milk production and milk composition was significantly higher in protein and lower in carbohydrate, while the lipid content was similar to that of PFG. When compared to PFG, the milk of EFG had a decreased proportion of C22:6 n-3 fatty acid and an increase in medium-chain fatty acids and of several minerals. Pups of EFG showed reduced growth and a lower concentration of Cu and Sr in plasma and lower concentrations of Ca, P and Cl, and... |
| Tipo: Journal article |
Palavras-chave: Breast milk; Ethanol; Rats; Lactation; Minerals status and milk composition. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602008000300008 |
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| Zhang,Lian-Dong; Deng,Qian; Wang,Zi-Ming; Gao,Ming; Wang,Lei; Chong,Tie; Li,He-Cheng. |
| Studies of developmental effects of mixtures of endocrine disrupters on the male reproductive system are of great concern. In this study, the reproductive effects of the co-administration of di-2-(ethylhexyl) phthalate (DEHP) and genistein (GEN) during pregnancy and lactation were studied in male rat offspring. Pregnant Sprague-Dawley rats were gavaged from gestation day 3 to postnatal day 21 with vehicle control, DEHP 250 mg/kg body weight (bwyday, GEN 50 mg/kg bwday, GEN 400 mg/kg bwday, and two combinations of the two compounds (DEHP 250 mg/kg bwday + GEN 50 mg/kg bwday, DEHP 250 mg/kg bwday + GEN 400 mg/kg bwday). The outcomes studied were general morphometry (weight, AGD), testicular histology, testosterone levels, and expression at the mRNA level of... |
| Tipo: Journal article |
Palavras-chave: Di-2-(ethylhexyl) phthalate; Genistein; Pregnancy; Lactation; Reproductive system. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602013000200004 |
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| Cambraia,R.P.B.; Vannucchi,H.; De-Oliveira,L.M.. |
| Studies on rats maintained on low-protein-calorie diets during the lactation period show that food intake decreases. This process results in weight loss and a delay in litter development. The purpose of the present study was to determine the alterations in food intake, maternal weight and litter growth during lactation when dams were exposed to diets with different levels of protein and carbohydrate. Female Wistar rats receiving one of 4 different diets, A (N = 14), B (N = 14), C (N = 9) and D (N = 9), were used. Diet A contained 16% protein and 66% carbohydrate; diet B, 6% protein and 77% carbohydrate; diet C, 6% protein and 66% carbohydrate; diet D, 16% protein and 56% carbohydrate. Thus, C and D diets were hypocaloric, while A and B were isocaloric. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactation; Malnutrition; Low-protein-calorie diet; Feeding behavior; Weight and growth of rats. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997000800012 |
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| Albuquerque,K.T.; Ramalho,R.A.; Soares,A.G.; Tavares-do-Carmo,M.G.. |
| The effect of the consumption of ethanol (5%) on retinol concentration in milk was studied in the rat on day 12 after delivery, together with the evolution of dam body weight and pup growth rate. Female Wistar rats receiving alcohol (5%) in drinking water during lactation (N = 7) were compared to normal controls fed ad libitum (N = 6). The mean maternal alcohol intake was 3.96 ± 0.23 g/kg body weight per day. To determine retinol levels in milk we used the Bessey and Lowry method, modified by Araújo and Flores ((1978) Clinical Chemistry, 24: 386-392). The pups were separated from dams for a 2-4-h period, after which the dams were injected intraperitoneally with anesthetic and oxytocin. The concentration of retinol in milk was 162.88 ± 10.60 µg/dl in the... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Lactation; Ethanol; Retinol; Milk; Rat. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000700007 |
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| Lactating rats show less noise-induced freezing and fewer inhibitory responses on the 6th day post-delivery when submitted to water and food deprivation in a classical conflict paradigm. Lactating mice go more often to the illuminated chamber in a light-dark cage and stay longer in it than virgin females. The present study was designed to assess the influence of this physiological state, i.e. lactation, on the elevated plus maze (EPM) and open-field behavior in adult female rats. Total (TL) and central (CL) locomotion and rearing (RF) frequencies were measured in an open-field. Number of entries into the open and closed arms as well as the time spent in each of these arms were measured in the EPM. Percent time spent and number of entries into the open arms... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Female rats; Anxiety; Elevated plus maze; Open-field test; Lactation. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997000200013 |
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| Palermo-Neto,J.; Sakaté,M.; Flório,J.C.. |
| The effects of postnatal amitraz exposure on physical and behavioral parameters were studied in Wistar rats, whose lactating dams received the pesticide (10 mg/kg) orally on days 1, 4, 7, 10, 13, 16 and 19 of lactation; control dams received distilled water (1 ml/kg) on the same days. A total of 18 different litters (9 of them control and 9 experimental) born after a 21-day gestation were used. The results showed that the median effective time (ET50) for fur development, eye opening, testis descent and onset of the startle response were increased in rats postnatally exposed to amitraz (2.7, 15.1, 21.6 and 15.3 days, respectively) compared to those of the control pups (1.8, 14.0, 19.9 and 12.9 days, respectively). The ages of incisor eruption, total... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pesticide neurotoxicology; Amitraz; Lactation; Behavioral teratology. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997000800013 |
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| Serafim,A.P.; Felicio,L.F.. |
| The pregnancy-induced increase in self-licking observed in rats is important for mammary gland development and lactation. Reproductive experience has epidemiologial implications such as a decrease in the incidence of mammary gland cancer in women and it also influences various behavioral, neurochemical and endocrine parameters. The aim of the present study was to investigate the influence of reproductive experience on grooming behavior patterns during pregnancy in rats. Self-grooming behavior was measured in age-matched virgin, primi- and multigravid (days 7, 8, 9, 19, and 20 of pregnancy) rats. General grooming (head, forelimbs and shoulders) was not significantly different among virgin, primi- and multigravid rats during pregnancy. Confirming previous... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Self-licking; Parity; Lactation; Mammary gland; Prolactin; Dopamine. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000300016 |
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| This study was designed to evaluate the thyroid and pituitary hormone levels in post-weaning rats whose dams were fed a low-protein diet during suckling (21 days). The dams and pups were divided into 2 groups: a control group fed a diet containing 22% protein that supplies the necessary amount of protein for the rat and is the usual content of protein in most commercial rat chow, and a diet group fed a low-protein (8%) diet in which the protein was substituted by an isocaloric amount of starch. After weaning all dams and pups received the 22% protein diet. Two hours before sacrifice of pups aged 21, 30 and 60 days, a tracer dose (0.6 µCi) of 125I was injected (ip) into each animal. Blood and thyroid glands of pups were collected for the determination of... |
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Palavras-chave: Thyroid; Protein malnutrition; Lactation; Thyrotropin; Thyroid hormones. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997000100020 |
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| Meneses R,Raul; Olivares V,Yohana; Martinoli S,Milenko; Flores P,Hugo. |
| Acacia saligna (Labill.) H.L. Wendl. forage is an alternative feed supply for goats during dry periods It was used as feed during pregnancy and lactation to evaluate production response and some blood parameters. Six animals in each group were fed with 0, 25, 50, 75, and 100% of acacia as alfalfa (Medicago sativa L.) hay replacement in a completely randomized design. Forage chemical analysis was done to calculate nutrient intake. Blood samples were analyzed for albumin, urea N, globulin, total protein, Ca, and P. Productive parameters were analyzed by ANOVA, Duncan, and regression analyses between acacia and dry matter (DM), crude protein (CP), metabolizable energy (ME), and milk production. Acacia consumption during pregnancy was 65.5% of control,... |
| Tipo: Journal article |
Palavras-chave: Acacia saligna; Pregnancy; Lactation; Milk production; Goats; Albumins. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000400014 |
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| Fruscalso,Vilmar; Antillón,Gabriela Olmos; Hötzel,Maria José. |
| ABSTRACT: This study aimed to describe the management practices used in dairy farms in the south of Brazil, and to understand farmers’ perceptions and attitudes regarding these practices. Farms (n=135) located in all 32 of the municipalities in the northern region of Rio Grande do Sul (Alto Uruguai Gaúcho), Brazil were characterized regarding all calf management practices during a farm visit where farms were inspected and farmers interviewed. In a second visit, 25 in depth interviews were done to understand farmers’ attitudes and perceptions towards these practices and potential influence on calves’ welfare and performance. Management of lactating calves was perceived by most of the interviewees as of marginal importance for dairy activity. In general... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dairy; Lactation; Suckling; Young cattle. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017001100801 |
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| Registros recuperados: 54 | |
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