A5022442792- Reproductive Physiology in Livestock
- Animal Behavior and Welfare Studies
- Veterinary Medicine and Surgery
- Veterinary Equine Medical Research
- Primate Behavior and Ecology
- Stress Responses and Cortisol
- Adrenal Hormones and Disorders
- Reproductive Biology and Fertility
- Genetic and phenotypic traits in livestock
- Marine animal studies overview
- Meat and Animal Product Quality
- Animal Nutrition and Physiology
- Wildlife Ecology and Conservation
- Growth Hormone and Insulin-like Growth Factors
- Pituitary Gland Disorders and Treatments
- Reproductive biology and impacts on aquatic species
- Neuroendocrine regulation and behavior
- Animal Behavior and Reproduction
- Aquaculture Nutrition and Growth
- Fish Ecology and Management Studies
- Dermatology and Skin Diseases
- Pharmacological Effects and Assays
- Thyroid Disorders and Treatments
- Effects and risks of endocrine disrupting chemicals
- Effects of Environmental Stressors on Livestock
Universidade de São Paulo
2014-2023
Universidade Brasil
2008-2023
Instituto Butantan
2020
Fundação Armando Alvares Penteado
2020
Centre Hospitalier Universitaire de Nice
2012
Parturition in cattle is a stressful event for both the dam and offspring. Stress pain can alter energy profile of calves calving cows, producing metabolic imbalance at birth. This study aimed to assess effects dystocia oxytocin calcium infusion on homeostasis dairy cows calves. Thirty Holstein their were divided into three groups: an eutocia group (n=10), which no assistance was needed; group, required mild-to-severe obstetric (n=10); uterine inertia treated with (n=10). To serum cortisol...
Progesterone (P4) plays a key role in pregnancy establishment and maintenance; during early pregnancy, P4 stimulates the production release of uterine secretions necessary for conceptus growth prior to implantation; therefore, exogenous supplementation may improve embryo development. This study evaluated effects with long-acting injectable progesterone or altrenogest on embryonic characteristics sows gilts. Thus, total 32 16 gilts were used. On day 6 allocated one following groups:...
Abstract Domestic cats (Felis catus) are widely believed to be highly sensitive the effects of social stress, especially when living in high density populations. Cats capable adapting a group, but this will often require opportunities for escaping and hiding. In pilot study, adrenocortical activity, as valuable physiological indicator arousal underpinning potential emotional was evaluated through measurement mean faecal glucocorticoid metabolites (mGCM) fourteen singly sixteen group-housed...
ABSTRACT The aim of this study was to evaluate hCG treatment on ovarian response and pregnancy rate using a 9-day oestrus synchronization protocol in Santa Ines ewes. On random cycle day, ewes received an intravaginal progesterone device (Primer-PR®, Tecnopec, Brazil). Nine days later (Day 9), 30µg d-cloprostenol (Prolise®, Syntex, Argentina) 250IU eCG (Folligon®, Intervet, Brazil) were administered the removed. This moment, randomly assigned two groups: Control Group Group. In Group, 500IU...
The Amazonian manatee (Trichechus inunguis) is endemic in the basin and only exclusively fresh water sirenian. Historically hunted on a large scale, this species now considered endangered, studies reproductive physiology are critical for improvement of management captive wild populations manatees. aim study was to verify viability androgen measurement saliva, lacrimal, urine, fecal samples by conducting hormone challenge. Two adult male manatees (A-1 A-2) were submitted an experimentation...
Our objectives were to investigate the possible role of VEGFA in bovine placenta steroid synthesis and determine whether cloned derived placental cells present similar responses as non-cloned ones. Placental from (term) (days 90, 150, 210 term) pregnancies isolated treated with (50 ng/ml) for 24, 48 or 96 h. Progesterone (P(4)) estrone sulfate (E(1)S) assessed by RIA, while aromatase P450-positive quantified using point counting test. The percentages steroidogenic non-steroidogenic...
Quantitation of progesterone (P(4)) in biological fluids is often performed by radioimmunoassay (RIA), whereas liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) has been used much less often. Due its autoconfirmatory nature, LC-MS/MS greatly minimizes false positives and interference. Herein we report compare with RIA an optimized method for rapid, efficient, cost-effective quantitation P(4) plasma cattle no sample derivatization. The released from three nonbiodegradable,...
The Amazonian manatee (Trichechus inunguis) is a threatened aquatic mammal endemic to the Amazon basin. aim of this study was evaluate urinary and salivary reproductive hormone levels captive manatees collected during two seasons year. Salivary samples from four males three females were (March-June September-November) over consecutive years. testosterone in measured by radioimmunoassay hormones (salivary progesterone oestradiol progestogens, oestrogens luteinising hormone) enzyme...
The influence of stress in an environment, according with the behavioral and endocrine variables primates, are increasingly being studied by a diversity authors, have shown that abnormal behaviors associated increased glucocorticoids may be directly related impairment their well-being. In this work were used 22 adult chimpanzees (Pan troglodytes), 11 males females, kept captivity three different institutions. All animals had behavior registered focal session using 30 seconds sample interval,...
Serum hormone levels were compared between captive and free-living maned wolves seasonal variations of sex hormones studied. Blood samples collected from 16 male 26 female adult animals Brazilian zoos, 30 24 adults to determine serum progesterone testosterone by radioimmunoassay. concentrations varied (P < 0.05) across seasons for males, being higher in autumn (2184.7 ± 355.1 pg/mL) than summer (1080.7 205.4 pg/mL), winter (1270.1 276.6 spring (963.9 248.1 although they did not differ...
Distress can be defined as a biological response of an individual to long-term threats its homeostasis and it should avoided from animal welfare perspective. High levels stress hormones the expression abnormal behaviours are responses normally observed in distressed animals. Captive environments provoke distress, especially when inappropriate stimuli provided The concomitant use behavioural non-invasive hormonal measures is means evaluate captive welfare. Environmental enrichment tool that...
Abstract Habitat loss and fragmentation have been leading jaguars to constant conflicts with humans, as a result, jaguar populations declining over the last decades. Captive breeding is often tool for species conservation, it not different jaguars. However, success far from optimal due lack of basic knowledge about species’ reproductive biology. In present study, we assessed gonadal hormonal profiles natural oestral cycles puberty compared our data those other wild felids. We collected...
This study evaluated the effects of supplying altrenogest from day 6-12 pregnancy on endometrial glandular epithelium, corpora lutea (CL) morphology, and CL gene expression. A total 12 crossbred females (Landrace × Large White) were used. The assigned to 4 treatments according a random design with 2 factorial arrangement, two categories (sow or gilt) (non-treated treated altrenogest). On 6 pregnancy, animals allocated one following groups: non-treated (NT, n = 6; 3 sows gilts), (T, gilts)...
Abstract Background The studies on fecal steroid metabolites published with free‐living primates are limited mainly by the difficulty in obtaining samples. Methods A radioimmunoassay was used to measure concentrations louatta belzebul N ational F orest of T apirape‐ quiri Brazil. Results and Conclusions Androgens were significantly higher for adult males from rea I nfluence ( AI ‐ group) when compared those C ontrol CA P < 0.05). Progestin estrogen females group than both offspring;...
This study aimed to evaluate the effect of exogenous recombinant bovine somatotropin (rbST) on plasma concentrations insulin-like growth factor I (IGF-I), insulin and semen quality bulls. Twenty bulls (Aberdeen Angus Brangus) were divided by breed into two groups. Placebo group was injected with NaCl 0.9% (s.c.) treatment rbST (s.c., 500 mg) at days 0 14 experiment. Immediately after collection, blood samples taken 0, 14, 28, 42 56 Semen also collected day 70 Evaluation sperm motility...
Hair is one widely used alternative matrix for endocrine studies. Not only can it maintain hormone content during storage long periods of time, but its collection also induces little to no stress. Noninvasive techniques have broadened the opportunities research, particularly regarding wild animals. Despite advantages, many sources variation may affect steroid concentration found in hair, such as body location harvested, fur color, reproductive status, and sex. Thus, domestic species, dog,...
Abstract: With the intent to evaluate efficiency of a contraceptive treatment for cyclic ovarian suppression in African Lionesses Panthera leo using Gonadotrophin-Releasing Hormone (GnRH) agonist bioimplant, noninvasive fecal steroid assay associated with observation behavioral estrus were employed period 36 months. Five captive adult females, maintained vasectomized male, subcutaneously received 9.4mg deslorelin acetate implant. The initially stimulated along activity, demonstrated by an...