Characterization of a Brazilian clayey soil submitted to conventional and no-tillage management practices using pore size distribution analysis     

Fabio Augusto Meira Cssaro  Angelo Kuhn Borkowski  Luiz Fernando Pires  Jadir Aparecido Rosa  Srgio da Costa Saab 《Soil & Tillage Research》2011,111(2):175-179

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Carcass traits and meat quality of Texel lambs raised in Brachiaria pasture and feedlot systems     

Pmila Carolini Gonalves da Silva  Camila Celeste Brando Ferreira Ítavo  Luís Carlos Vinhas Ítavo  Marina de Nadai Bonin Gomes  Gelson Luís Dias Feij  Kedma Leonora Silva Monteiro Ferelli  Natlia da Silva Heimbach  Jonilson Araújo da Silva  Gleice Kelli Ayardes de Melo  Marília Williani Filgueira Pereira 《Animal Science Journal》2020,91(1)

Our hypothesis suggests an improvement in carcass and meat quality of pasture‐finished animals by introducing concentrate feed into diets. This study aimed to evaluate the effect of different levels of protein‐energy supplementation on carcass and meat characteristics of Texel lambs raised on Brachiaria pastures, and compare the results with those obtained from confined animals. Thirty 2‐month‐old intact lambs were divided into five treatments: pasture with mineral supplementation, pasture containing daily supplies of 0.8, 1.6, and 2.4% BW protein‐energy supplementation, and confinement (reference treatment). All animals were slaughtered 104 days after the beginning of the experiment. Lambs submitted to 1.6% and 2.4% BW supplementation presented similar characteristics to animals kept in confinement and were superior to animals treated with 0 or 0.8% of BW supplementation levels (p < .05). Increases of subcutaneous fat thickness were verified for 0.0, 0.8, 1.6, 2.4% BW, and confinement treatments, being respectively of 0.25, 0.74, 1.61, 1.69, and 1.98. Conversely, treatments had no influence on meat physical‐chemical characteristics, being all considered moderately soft, juicy (tender), and with mild tastes and odors. Lambs raised on Brachiaria pastures have high‐quality meat, but more protein‐energy supplementation is needed to be an alternative for the feedlots for young animals.  相似文献   

Dual-purpose Guzerá cattle exhibit high dairy performance under heat stress     

Mário L. Santana Jr  Rodrigo J. Pereira  Annaiza B. Bignardi  Lenira El Faro  Maria F. Á. Pires  Ricardo G. Andrade  Bruno C. Perez  Frank A. T. Bruneli  Maria G. C. D. Peixoto 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2020,137(5):486-494

The present study evaluated the heat stress response pattern of dual-purpose Guzerá cattle for test-day (TD) milk yield records of first lactation and estimated genetic parameters and trends related to heat stress. A total of 31,435 TD records from 4,486 first lactations of Guzerá cows, collected between 1986 and 2012, were analysed. Two random regression models considered days in milk (DIM) and/or temperature × humidity-dependent (THI) covariate. Impacts of −0.037, −0.019 and −0.006 kg/day/THI for initial and intermediate stages of lactation were observed when considering the mean maximum daily temperature and humidity to calculate THI. Heritability estimates ranged from 0.16 to 0.35 throughout lactation and THI values, suggesting the possibility to expect gains from selection for such trait. The variable trajectory of breeding values for dual-purpose Guzerá sires in response to changes in THI values confirms that the genotype × environment interaction due to heat stress can have some effect on TD milk yield. Despite the high dairy performance of Guzerá cattle under heat stress, estimated genetic trends showed a progressive reduction in heat tolerance. Therefore, new strategies should be adopted to prevent negative impacts of heat stress over milk production in Guzerá animals in future.  相似文献   

Combinations of cactus pear with different roughage sources on the production,chemical composition,and milk fatty acid profile of F1 Holstein/Zebu cows     

Soares  Camila  Rocha Júnior  Vicente Ribeiro  Monção  Flávio Pinto  Borges  Lucas Daniel Alcântara  Caldeira  Luciana Albuquerque  Costa  Natanael Mendes  Ruas  José Reinaldo Mendes  Rigueira  João Paulo Sampaio  da Cunha Siqueira Carvalho  Cinara  de Sales  Eleuza Clarete Junqueira  de Assis Pires  Daniel Ananias  Chamone  Julieta Maria Alencar 《Tropical animal health and production》2020,52(5):2567-2576

Tropical Animal Health and Production - The qualities of food, mainly of animal origin, have always been of concern to consumers. It is known that the composition of animals’ diets can...  相似文献   

Characterization of Protein Hydrolysates from Fish Discards and By-Products from the North-West Spain Fishing Fleet as Potential Sources of Bioactive Peptides     

Andreia Henriques  Jos A. Vzquez  Jesus Valcarcel  Rogrio Mendes  Narcisa M. Bandarra  Carla Pires 《Marine drugs》2021,19(6)

Fish discards and by-products can be transformed into high value-added products such as fish protein hydrolysates (FPH) containing bioactive peptides. Protein hydrolysates were prepared from different parts (whole fish, skin and head) of several discarded species of the North-West Spain fishing fleet using Alcalase. All hydrolysates had moisture and ash contents lower than 10% and 15%, respectively. The fat content of FPH varied between 1.5% and 9.4% and had high protein content (69.8–76.6%). The amino acids profiles of FPH are quite similar and the most abundant amino acids were glutamic and aspartic acids. All FPH exhibited antioxidant activity and those obtained from Atlantic horse mackerel heads presented the highest 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity, reducing power and Cu²⁺ chelating activity. On the other hand, hydrolysates from gurnard heads showed the highest ABTS radical scavenging activity and Fe²⁺ chelating activity. In what concerns the α-amylase inhibitory activity, the IC₅₀ values recorded for FPH ranged between 5.70 and 84.37 mg/mL for blue whiting heads and whole Atlantic horse mackerel, respectively. α-Glucosidase inhibitory activity of FPH was relatively low but all FPH had high Angiotensin Converting Enzyme (ACE) inhibitory activity. Considering the biological activities, these FPH are potential natural additives for functional foods or nutraceuticals.  相似文献   

Effects of an extreme flash flood on the native fish assemblages across a Mediterranean catchment     

A. M. PIRES  M. F. MAGALHÃES  L. MOREIRA DA COSTA  M. J. ALVES  & M. M. COELHO 《Fisheries Management and Ecology》2008,15(1):49-58

Abstract  The effects of an extreme flash flood on the native fish assemblages across a Mediterranean catchment in Southwest Portugal were investigated. The fish community structure and habitat were surveyed at 10 sites pre- and post-flood. Overall species richness and rank abundances changed little after the flood, despite there being a consistent decline in the abundance of small cyprinids. Pre- and post-flood habitat correlates of abundance changed for at least some species, and variability in assemblage structure was associated with flood, depth and pH. These results indicate that extreme floods occurring early in the wet season may have little disruptive effects on the overall structure of native fish assemblages in Mediterranean streams, although may at least partially influence population dynamics for some species. Habitat quality and complexity are likely to play a role in mediating species responses to flooding.  相似文献   

Ocular inserts for application of drugs to bovine eyes —in vitro studies on gentamicin release from collagen inserts     

P. I. PUNCH  D. H. SLATTER  N. D. COSTA  M. E. EDWARDS 《Australian veterinary journal》1985,62(3):79-82

Soluble collagen and insoluble collagen films were impregnated with gentamicin and investigated in vitro as vehicles for the delivery drugs. Succinylated collagen released significantly higher levels of antibiotic than the insoluble films, and maintained mean inhibitory concentrations (MIC) for Moraxella bovis for 24 h.  相似文献   

Culture and propagation of microsporidia of veterinary interest     

Maria Anete LALLO  Lidiana Flora VIDOTO DA COSTA  Anuska Marcelino ALVARES-SARAIVA  Paulo Ricardo Dell’Armelina ROCHA  Diva Denelle SPADACCI-MORENA  Fabiana Toshie de Camargo KONNO  Ivana Barbosa SUFFREDINI 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2016,78(2):171-176

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Changes in c‐erbB‐2 Immunoexpression in Feline Endometrial Adenocarcinomas          下载免费PDF全文

AL Saraiva  R Payan‐Carreira  F Gärtner  F Faria  LM Lourenço  MA Pires 《Reproduction in domestic animals》2016,51(1):33-39

Human epidermal growth factor receptor type 2 (c‐erbB‐2), an oncoprotein with potential prognostic marker and therapeutic use, is overexpressed in several human and animal tumours. But information regarding this molecule in feline tumours is scarce. This study aimed to assess the changes in the immunohistochemical expression of c‐erbB‐2 in feline endometrial adenocarcinomas (FEA) compared to normal endometrium. An immunohistochemistry assay using a specific antibody against c‐erbB‐2 was performed in FEA samples (n = 34) and in normal endometrium in the follicular (FS; n = 12) and luteal (LS; n = 11) stages. In FEA, the c‐erbB‐2 immunoexpression was assessed in neoplastic epithelial cells whilst in normal endometria it was individually evaluated in the surface and the superficial and deep glandular epithelia (SE, SGE and DGE, respectively). In FS and in LS, all the epithelia were positive for c‐erbB‐2; positivity was higher in the SE and the SGE than in DGE. Twenty of the 34 FEA samples (58.8%) were positive for c‐erbB‐2 immunolabelling. Nevertheless, its expression was higher in all the epithelia in the FS compared to FEA (p ≤ 0.0001) or the LS (p = 0.016). The results presented herein suggest that c‐erbB‐2 molecule is differently expressed in the feline endometrium through the oestrous cycle and though it may also be involved in feline endometrial carcinogenesis, a question remains unanswered on the importance of additional pathways of epithelial proliferation in the neoplastic changes in feline endometrium.  相似文献   

PCR-based diagnosis for detection of Leishmania in skin and blood of rodents from an endemic area of cutaneous and visceral leishmaniasis in Brazil     

Oliveira FS  Pirmez C  Pires MQ  Brazil RP  Pacheco RS 《Veterinary parasitology》2005,129(3-4):219-227

The technique of polymerase chain reaction (PCR) associated to hybridization was used to screen 123 samples collected from wild and synanthropic rodents captured in a cutaneous and visceral leishmaniasis endemic area in the State of Minas Gerais, Brazil. The detection of Leishmania spp in naturally infected rodents is of fundamental importance for incriminating them as possible reservoir hosts of the diseases in Minas Gerais. A total of 62 specimens belonging to wild (Thrichomys apereoides, Oryzomys subflavus, Galea spixii, Bolomys lasiurus and Wiedomys pyrrhorhinos) and synanthropic (R. rattus) rodent species were captured in different ecotopes. Blood and skin samples were submitted for PCR analyses followed by molecular hybridization with specific probes for the three Leishmania-species complexes. Fifteen samples were found positive after PCR-hybridization and identified as follows: nine belonging to the L. mexicana complex, three to the L. braziliensis complex and three to the L. donovani complex. Positive PCR results were found in 11 out of the 61 (18%) blood samples and in four out of the 62 (6.4%) skin fragments screened. R. rattus and T. apereoides were the most abundant species in the area also presenting high prevalence of natural infection. The presence of parasite DNA belonging to L. braziliensis, L. mexicana and L. donovani complexes was confirmed in several individuals of a rodent species, R. rattus. This work is the first report of the detection of L. (L.) chagasi in a naturally infected T. apereoides. The utility of filter paper as a substrate for PCR analyses and the efficacy of the procedure associated to the hybridization is emphasized.  相似文献