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A Qualitative Analysis of High Achieving African-American Females' Perceptions on Factors That Impact on Time High School Graduation in Southeastern VirginiaPatterson, Melanie Marshee 08 December 2014 (has links)
The purpose of this study was to identify the experiences, attitudes, and successes of a group of high achieving African American female students that impact their on-time high school graduation. On-time graduates are described as students who complete high school in four years. High achieving African-American female students completing high school on time identified factors related to family, school, and community as essential in their success. Several underlying factors are within the three themes that studies show can be used as a way to pilot programs, deter drop-outs from leaving school early, and cohesively work in communities across the United States.
A qualitative approach was used to analyze a selected group of high achieving African American females' perceptions to their success in high school. The research questions were: 1. What school factors do a group of high achieving African-American female students perceive as attributing to their on-time graduation from high school with honors and advanced diplomas? 2. What family influences do these high achieving females perceive as attributes to graduating on-time with honors and advanced diplomas? 3. What community influences do these high achieving African American females' perceive as contributors to on-time graduation with honors and advanced diplomas? Twenty-four high achieving African American females' from one high school were eligible to participate in the study. Eight students participated in the study, which included open-ended interview questions and a sentence completion questionnaire. All interview questions were centered on the support provided by the school, community, or family.
The results of the study showed parents; specifically the mothers of the participants had the greatest impact on the high achieving African American females' performance in high school. The teachers of the high achieving African American female students were supportive and caring. The community recognition that the high achieving African American females received was a motivating factor to varying degrees. The high achieving African American female participants, in the study, all possessed intrinsic motivation and work ethic to be academically successful. / Ed. D.
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Exploring Female Involvement in Criminal Gang Environments: Motivations, Consequences, and Preventive Strategies : Perspectives and Recommendations from Field ProfessionalsGrundtvig, Olivia Cecilie January 2024 (has links)
This thesis delves into the complex dynamics of female involvement in criminal gang environments. These females can be divided into two groups: insiders, who are introduced to the environment through close acquaintances, and outsiders, who do not have close relationships within the environment. Through qualitative interviews with key informants from Danish law enforcement and municipalities, this thesis addresses the females’ motivation to engage with gang members as well as the potential consequences of these relationships. This thesis also examines the challenges field professionals face when engaging with these females, as well as which preventive initiatives could be implemented in Western Copenhagen. The findings from this thesis revealed that females are motivated to engage in relationships with criminals due to various factors, encompassing the desire for status, protection, and financial or material gain. A potential consequence of these relationships is the risk of becoming a victim of either psychological, physical, or sexual abuse. Conversely, another potential consequence of such relationships is the pressure or temptation to participate in crime, thereby becoming an offender themselves. In certain cases, there will thus be a victim-offender overlap.There is a notable lack of attention towards females involved in gang environments in the preventive work in Western Copenhagen. Additionally, there is currently no unified approach when working with these females. As a result, professionals encounter various challenges when working with females involved with gang members. It is thus important to increase awareness about this issue and implement early preventive strategies tailored to females in Western Copenhagen. Finally, this thesis finds that when field professionals engage with these females, it is crucial to maintain a holistic approach, considering the diverse motivations and consequences the females encounter.
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Altitude- and Sex-Specific Variation in Roosting Ecology and Thermoregulation of <em>Myotis lucifugus</em> in Yellowstone National ParkSlusher, Alexandra C. 01 January 2017 (has links)
Fifty-nine female and six male little brown myotis (Myotis lucifugus) were radio-tagged during the summers of 2012, 2013, 2014, and 2015 in Yellowstone National Park. The grand models for daily maximum skin temperature (F98,154 = 1.55, P = 0.007), daily minimum skin temperature (F98,154 = 1.33, P = 0.05), and daily variation in skin temperature (F98,154 = 1.56, P = 0.006) were significant across roost type and reproductive condition class for adult females. Roosts were classified into Types A (warmest roosts), B (roosts with largest daily temperature variance), and C (stable and cool roosts) depending on differences in mean maximum, minimum, and variance in temperatures per day (P < 0.001). A total of 347 torpor bouts were recorded from 38 females across the 2012 to 2015 summer seasons. Bats across different reproductive classes and roost types used torpor at different hours of the day. My research suggests that adult female little brown myotis at high elevations in the Park extensively use and rely on building structures for roosting sites during the reproductive season, whereas males used primarily natural roosts.
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Psychological Correlates of Anorexic and Bulimic SymptomatologyRogers, Rebecca L. (Rebecca Lynn) 08 1900 (has links)
The purpose of this study was to examine the degree to which several psychological and personality variables relate to anorexic and bulimic symptomatology in female undergraduates. Past research investigating the relationship between such variables and eating disorders has been contradictory for several reasons, including lack of theoretical bases, discrepant criteria, or combination of anorexia and bulimia nervosa. Recent investigators have concluded that it is important to examine subdiagnostic levels of eating pathology, especially within a college population. Thus, the present investigation used a female undergraduate sample in determining the extent to which several psychological factors--obsessiveness, dependency, over-controlled hostility, assertiveness, perceived control, and self-esteem--account for anorexic and bulimic symptomatology. Regression analyses revealed that anorexic symptoms were best explained by obsessiveness and then two measures of dependency, emotional reliance on another and autonomy. Bulimic symptoms were related most strongly to lack of social self-confidence (a dependency measure) and obsessiveness. Clinical implications and directions for future research are addressed.
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Female Adolescent Runaways: Personality Patterns in Response to Physical or Sexual AbuseKeefe, Carmen Kay 08 1900 (has links)
Personality patterns of sexually abused female adolescent runaways are compared to personality patterns of physically abused female adolescent runaways. Eighty-six female adolescents from 13 to 17 years of age completed a self report inventory to determine personality traits. To test the hypotheses of the study, a multivariate analysis of variance was conducted, followed with univariate tests to find differences on separate dependent measures. Results indicated that on the Jesness Inventory there may be a common personality pattern associated with abuse. Univariate tests yielded data which indicated that although there may be a general personality pattern for abused adolescents, there were significant differences between the physically and sexually abused adolescents on some personality variables. Results were evaluated taking into account the selective sample from which the population was drawn. Recommendations for future research included the use of projectives, a more comprehensive personality inventory, and selected demographics.
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Chronic Alterations in Joint Flexibility Associated with Aerobic Dance Instruction of College Age FemalesCooper, Melisa Lynne 08 1900 (has links)
The purposes of this study were (1) to determine if three selected aerobic dance related conditions would result in chronic alterations of flexibility of college women and (2) to compare flexibility measures of college age females during a semester of aerobic dance instruction. Subjects were sixty-three college women enrolled in aerobic dance, bowling, and archery classes. Eight flexibility measures were obtained during the third and eleventh weeks of the experimental period. Data were analyzed by a factor analysis the Pearson Product Moment Correlation, and eight oneway analyses of covariance. Conclusions of the investigation were (1) a program of aerobic dance alone is not sufficient to promote flexibility, and (2) supplemental flexibility activities of ten minutes duration used with aerobic dance training are beneficial in increasing hip flexion.
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Conservação dos quelônios amazônicos: ecologia populacional e perfil dos caçadores da espécie Podocnemis Expansa (Tartaruga–da–Amazônia) no entorno do Parque Nacional do Araguaia, TocantinsFaria, Vailton Alves de 29 June 2018 (has links)
O trabalho busca contribuir com a compreensão da conservação dos quelônios da espécie
Podocnemis expansa através de estudos de ecologia reprodutiva, avanço das fronteiras
agropecuárias e do histórico de fiscalização, caça e comercialização desses animais na região
central do Corredor Ecológico Araguaia Bananal no Estado do Tocantins. A pesquisa
apresenta uma abordagem metodológica dividida em quarto etapas distintas. Inicialmente,
busca apresentar e analisar as projeções da produção agropecuária dos municípios de Caseara,
Cristalândia, Formoso do Araguaia, Lagoa da Confusão, Marianópolis e Pium com a
quantidade de fêmeas de quelônios da espécie P. expansa nidificando nas praias do rio Javaés
durante o período de execução do Projeto Quelônios da Amazônia (PQA), compreendido
entre 1985 e 2010. Os dados da produção agropecuária foram analisados para a série histórica
de 1990 a 2015, através do número de cabeças de gado de corte e área plantada com lavoura
temporária e lavoura permanente, todos para o conjunto dos municípios citados. Para análise e
previsão dos dados, utilizou-se o modelo de séries temporais Autorregressivo Integrado de
Médias Móveis de Box Jenkins (1976). Em seguida, buscou-se avaliar o perfil socioambiental
das pessoas que utilizam e/ou comercializam esses animais a partir dos laudos de apreensão e
de entrevistas semiestruturadas. Ao todo foram registrados 93 autos de infração, com 589
animais recapturados e devolvidos a natureza, sendo que destes mais de 80% são da espécie
P. expansa. Os infratores autuados nas ações de fiscalização se configuram essencialmente
como pessoas de baixa renda, com pouca ou nenhuma escolaridade e idade variando entre 21
e 75 anos, todos do sexo masculino. Nas entrevistas, 88,34% afirmaram consumir os animais,
sendo que 51,45% apresentaram preferência pela P. expansa, 30,09% pelo P. unifilis, 6,70%
consomem Chelonoidis sp e apenas 11,76% não consomem, desse total, 60,19% afirmaram
não consumir ovos. 61,16% afirmaram que o principal período de captura é de agosto a
dezembro e que os índios são os principais responsáveis pela captura e comercialização,
sendo apontados por 49,51% dos entrevistados. Para grande maioria, 67%, não existe
fiscalização na região e que, mesmo sem a fiscalização, é razoável a quantidade de animais na
natureza. Para 41,74%, o manejo sustentável através de cotas seria a melhor alternativa para
preservação e conservação das espécies. Na terceira etapa, foram avaliados os aspectos
geomorfológicos das áreas de nidificação da P. expansa entre 1985 e 2010 em cinco praias do
rio Javaés na região central do Parque Nacional do Araguaia na Ilha do Bananal. A densidade
dos ninhos ao longo das praias mostrou uma preferência desses animais por ambientes que
possuem características geomorfológicas distintas, seja em relação às dimensões físicas,
elevação do banco de areia ou variações no nível de água no rio. Na quarta e última etapa da
pesquisa, buscou-se avaliar o padrão reprodutivo das fêmeas de P. expansa em ambiente
natural. O tamanho das fêmeas foi estimado a partir dos rastros deixados por elas durante a
deambulação e/ou logo após a postura. Os resultados mostram que fêmeas maiores possuem
ninhadas com mais ovos, filhotes maiores e com maior massa corporal. / The work seeks to contribute to the understanding of the conservation of the species of
Podocnemis expansa by means of studies on reproductive ecology, the advancement of
agricultural frontiers and the control, hunting and commercialization of these animals in the
central region of the Araguaia Bananal Ecological Corridor in the State of Tocantins. The
research presents a methodological approach divided into four distinct stages. Initially, it
seeks to present and analyze the projections of the agricultural production of the
municipalities of Caseara, Cristalândia, Formoso do Araguaia, Confusion Lagoon,
Marianópolis and Pium with the number of females of species of P. expansa species nesting
on the beaches of the Javaés river during the period (PQA) between 1985 and 2010. The data
of agricultural production were analyzed for the historical series from 1990 to 2015, through
the number of heads of cattle and area planted with temporary crops and crops all the
municipalities mentioned. For the data analysis and prediction, the Box-Jenkins (1976) SelfCorrelated
Integrated Average Averages model was used. Next, the objective was to evaluate
the socioenvironmental profile of the people who use and / or commercialize these animals
from the seizure reports and semi-structured interviews. In all, 93 infraction notices were
registered, with 589 animals recaptured and returned to nature, of which more than 80%
belong to the species P. expansa. The offenders assessed in the actions of inspection are
essentially as low-income people, with little or no schooling and age ranging from 21 to 75,
all males. In the interviews, 88.34% reported consuming the animals, and 51.45% preferred P.
expansa, 30.09% P. unifilis, 6.70% consumed Chelonoidis sp and only 11.76% did not
consume, of this total, 60.19% stated that they did not consume eggs. 61.16% stated that the
main capture period is from August to December and that the Indians are the main responsible
for capture and commercialization, being pointed out by 49.51% of the interviewees. For the
great majority, 67%, there is no inspection in the region and, even without inspection, the
amount of animals in the wild is reasonable. For 41.74%, sustainable management through
quotas would be the best alternative for the preservation and conservation of species.
In the third stage, the geomorphological aspects of the expansa nesting areas between 1985
and 2010 were evaluated in five beaches of the Javaés river in the central region of the
Araguaia National Park on Bananal Island. The density of the nests along the beaches showed
a preference of these animals for environments that have distinct geomorphological
characteristics, either in relation to the physical dimensions, elevation of the sandbank or
variations in the level of water in the river. In the fourth and last stage of the research, the
objective was to evaluate the reproductive pattern of P. expansa females in a natural
environment. The size of the females was estimated from the traces left by them during
ambulation and / or shortly after laying. The results show that larger females have litters with
more eggs, larger pups and larger body mass.
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EFEITO DA GENISTEÍNA NA FUNCIONALIDADE DE MACRÓFAGOS: UM ESTUDO COMPARATIVO ENTRE RATOS MACHOS E FÊMEASJuraszeck, Camila 19 April 2011 (has links)
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Previous issue date: 2011-04-19 / Genistein has estrogenic activity and can bind to estrogen receptors (ER), so it is considered a phytoestrogen. ER have been reported in macrophages and in that sense, the estrogens modulate immune responses. Despite the sexual dimorphism of the immune responses in females and males is well established, there are few studies that elucidate the role of bioactive compounds such as genistein among the genders. We investigated the effects of genistein on mice macrophage functionality, benchmarking males and females, which are divided into three groups according to sex and stage of the estrous cycle. First we checked the cytotoxicity,employing the technique of MTT reduction, in the following compounds: genistein, quercetin and 17-estradiol in the presence or absence of lipopolysaccharide (LPS). And none of these
altered cell viability. To test the functionality of macrophages, the cells were treated for 24 h with two concentrations of genistein and quercetin (5M and 10M) as well as two concentrations of 17-estradiol (0,01 and 10 M), besides the control of the vehicle, the dimethylsulfoxide (DMSO) at 0,5%. The macrophages’ funtion standarts determined by spectrophotometry were the NO production in both basal and LPS induced, the production of H2O2 induced by LPS and by light microscopy was evaluated the phagocytic ability of macrophages, which were challenged to phagocytize Zymosan particles opsonized or not, after two hours of treatments. The results show a inhibition percentage of basal NO production in macrophages treated with genistein 10M, 34% and 40% for males and females in diestrus, respectively. In the macrophages obtained from females in proestrus quercetin treatment alone (in lower and higher concentration) showed a decrease in basal NO production significantly compared to control, with inhibition of 24% and 34% respectively. As NO production induced by LPS, macrophages from males showed significant inhibition of production with all treatments (except quercetin 5 μM), while in females in diestrus, treatments genistein (5 and 10 μM) and quercetin (5 and 10 μM ), this parameter significantly decreased functional macrophages, with values corresponding respectively to 25%, 30%, 17% and 31%. Once in females in proestrus, basal NO production induced by LPS and was inhibited only by
quercetin (10M). All treatments of macrophages collected from the male reduced the production of H2O2 and genistein inhibition percentage of 10M of 27%. In females in diestrus
was observed that treatment with genistein 5 e 10 M and quercetin 10M inhibited respectively 29%, 32% and 37% the production of H2O2. The H2O2 production by macrophages from females in proestrus was significantly inhibited by all treatments (except estradiol 0,01 ηM and quercetin 10M), and the percentage inhibition of genistein 5 e 10M was 22%. The phagocytic activity of macrophages was not affected by treatment with genistein for either group. Our results suggest that NO production, macrophages premodulated by exposure to 17-estradiol, the effect of genistein is less pronounced, may possible be explained by downregulation of ER in ex vivo treatments. In conclusion we can infer that, the use of genistein should account for sex, and therefore variations in serum hormone concentrations of 17-estradiol (sexual cycle) in females. / A genisteína têm atividades estrogênicas, e pode se ligar aos receptores de estrogênio (RE), por isso é considerada um fitoestrógeno. RE têm sido relatados em macrófagos e nesse sentido, os estrogênios modulam as respostas imunes. Apesar do dimorfismo sexual das respostas imunes de fêmeas e machos estar bem estabelecido, existem poucos estudos que elucidem o papel de compostos bioativos como a genisteína entre os sexos. Neste estudo, investigamos os efeitos da
genisteína na funcionalidade de macrófagos de ratos, avaliando comparativamente machos e fêmeas, sendo estes divididos em três grupos de acordo com o sexo e a fase do ciclo estral. Primeiramente verificamos a citotoxicidade, empregando a técnica de redução do MTT, dos seguintes compostos: genisteína, quercetina e 17-estradiol, na presença ou ausência de lipopolissacarídeo (LPS). E nenhum destes alterou a viabilidade celular. Para o ensaio da
funcionalidade dos macrófagos, as células foram tratadas por 24 horas com duas concentrações de genisteína e quercetina (5M e 10M), como também duas concentrações de 17-estradiol (0,01 e 10 M), além do controle do veículo, o dimetilsulfoxido (DMSO) na concentração de 0,5%. Dos parâmetros de funcionalidade dos macrófagos, foram determinadas por espectrofotometria a produção de NO tanto basal quanto a induzida por LPS, bem como a produção de H2O2 induzida por LPS, e por microscopia de luz realizou-se a avaliação da capacidade fagocítica dos macrófagos, que foram desafiados a fagocitar partículas de Zimosan opsonizadas ou não, após tratamentos de 2 horas. Os resultados encontrados revelam uma porcentagem de inibição da produção de NO basal de macrófagos tratados com genisteína 10 M de 34% e 40%, para machos e fêmeas em diestro, respectivamente. Nos macrófagos obtidos das fêmeas em proestro apenas o tratamento quercetina (em menor e maior concentração) apresentou diminuição na produção de NO basal significativa em relação ao controle, com inibição de 24% e 34% respectivamente. Quanto a produção de NO induzida por LPS, macrófagos de machos apresentaram inibição significativa da produção com todos os tratamentos (exceto quercetina 5M), enquanto nas fêmeas em diestro, os tratamentos genisteína (5 e 10 M) e quercetina (5 e 10
M), diminuíram significativamente esse parâmetro funcional de macrófagos, com os valores correspondentes respectivamente a 25%, 30%, 17% e 31%. Já nas fêmeas em proestro, a
produção de NO basal e induzida por LPS foi apenas inibida pela quercetina (10M). Todos os tratamentos dos macrófagos obtidos de machos reduziram a produção de H2O2, sendo
porcentagem de inibição da genisteína 10 μM de 27%. Nas fêmeas em diestro observa-se que os tratamentos com genisteína 5 e 10M e quercetina 10 M inibiram respectivamente em 29%, 32% e 37% a produção de H2O2. A produção de H2O2 pelos macrófagos das fêmeas em proestro
foi inibida significativamente por todos os tratamentos (exceto estradiol 0,01 M e quercetina 10 M), sendo que a porcentagem de inibição da genisteína 5 e 10 M foi de 22%. A atividade fagocítica dos macrófagos não foi influenciada pelo tratamento com a genisteína para nenhum dos grupos. Nossos resultados são sugestivos de que a produção de NO nos macrófagos prémodulados pela exposição ao hormônio estradiol o efeito da genisteína é menos acentuado, podendo ser explicado por possível downregulation dos RE em tratamentos ex vivo. Em conclusão podemos inferir que para o emprego da genisteína deve se levar em consideração o sexo, e por conseguinte, a variação da concentração hormonal sérica de 17-estradiol (ciclo sexual) em fêmeas.
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Den lekmogna Siljansöringens rörelsemönster i Österdalälven : - Betydelsen av ursprung och kön / Movement patterns of prespawning Siljan trout in the River Österdalälven : -Influence of origin and sexTjäder, Åsa January 2019 (has links)
I Österdalälven har mängden Siljansöring (Salmo trutta) minskat avsevärt på grund av kraftverk som stoppar fiskens vandringsvägar. För att lyckas med att stärka beståndet krävs en fördjupad kunskap kring fiskens beteendemönster, bland annat rörelser i samband med uppströms lekvandring. Denna studie är ett försök att ge en överblick av den lekmogna Siljansöringens uppströmsvandring i Österdalälven och se om det föreligger några skillnader mellan odlad/vild öring respektive hanar/honor. Genom akustisk telemetri har 18 Siljanöringars rörelser längs en begränsad älvsträcka registrerats under 56 dagar. Analys har gjorts för hitta variationer både rumsligt och tidsmässigt samt mellan odlade/vilda Siljansöringar respektive honor/hanar, likväl som skillnader avseende rörelser, tim- och dygnsaktivitet och benägenhet att söka sig uppströms till det definitiva vandringshindret Spjutmo kraftverk. Siljansöringarna rörde sig mer under dagen jämfört med natt vilket skulle kunna kopplas till påverkan från elproduktion och vattenströmmar som skapas vid Spjutmo kraftverks turbinutlopp och/eller att dagsljuset är en fördel då de använder sig av synintryck för att kunna navigera. Skillnader (dock ej statistiskt säkerställda) kunde urskiljas mellan odlade och vilda fiskar och hanar/honor, såsom exempelvis att vild fisk simmade längre sträckor än odlad. Studier som denna är viktiga för att kunna få en helhetsbild kring livsvillkor och beteendemönster för Siljansöring och därigenom lyckas med framtida förvaltnings- och åtgärdsarbeten. / The number of Siljan trout (Salmo trutta) in the River Österdalälven has declined due to hydropower development. To restore the river information about the behavioural patterns of the trout, such as upstream migration, are needed. The aim of this study is to describe the upstream movements of tagged Siljan trout as well as to identify differences between hatchery-reared and wild trout and between males and females. During 56 days, 18 individuals tagged with acoustic telemetry transmitters were registered in a section of the River Österdalälven. The data were analysed to identify variation in time and space as well as differences between origin (hatchery-reared vs wild trout) and sex. Analyses were also performed on hourly and diel movement patterns and if the fish swam upstream to the first migration barrier, the power station in Spjutmo. Variation in diurnal activity was identified, with higher activity during daytime compared to night, which might be related to power production in relation to currents flowing from turbine outlets and/or the importance of daylight for effective navigation. There were no significant differences identified between hatchery-reared and wild trout, respectively, nor were there any sex-related differences. Information obtained from this study is important to understand the situation for Siljan trout, to help in future management and restoration of this valuable stock of trout.
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Suplementação de ácidos graxos poliinsaturados ômega-3 em fêmeas suínas: impacto sobre marcadores metabólicos e desempenho reprodutivo / Supplementation with omega-3 polyunsaturated fatty acids in swine females: impact on metabolic markers and reproductive performancePosser, Claudio Junior Machado 15 February 2016 (has links)
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Previous issue date: 2016-02-15 / Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq / A suplementação de ácidos graxos poliinsaturados (PUFA) contendo ômega-3,
especialmente o ácido docosahexaenoico (DHA), na dieta de fêmeas suínas pode
ser uma alternativa para melhorar o seu desempenho reprodutivo. O objetivo deste
estudo foi avaliar os parâmetros reprodutivos e os níveis séricos de marcadores
metabólicos em fêmeas suínas suplementadas com ômega-3. Neste estudo, 463
fêmeas suínas foram suplementadas na dieta com uma fonte de DHA extraído de
microalgas, a partir de 85 dias de gestação e durante a lactação e o intervalo
desmame-estro (IDE). Os níveis de inclusão de DHA foram: 0,0 (controle); 3,5; 7,0;
14,0; e 28,0 g/d. Foram realizadas três coletas de sangue, no início do tratamento
(durante a gestação), dez dias após o parto (durante a lactação) e um dia antes do
desmame, para avaliação dos níveis séricos de indicadores metabólicos:
triglicerídeos; colesterol; fator de crescimento semelhante a insulina tipo I (IGF-1); e
ácidos graxos não esterificados (NEFA). Os tratamentos não apresentaram efeitos
sobre a taxa de natimortalidade, o tamanho total da leitegada e a duração do IDE no
parto no qual houve suplementação (P > 0,05), nem sobre o total de leitões nascidos
e a taxa de natimortalidade no parto subsequente P > 0,05). Durante a gestação, os
níveis séricos de colesterol e IGF-1 foram inferiores (P < 0,05) e os níveis de NEFA
foram mais elevados durante a gestação (P < 0,05) do que durante a lactação e o
IDE. Ainda, durante a gestação, os níveis séricos de triglicerideos foram reduzidos
(P < 0,05) apenas em fêmeas suplementadas com 14 e 28 g de ômega-3. A
suplementação de fêmeas suínas com esta fonte de ômega-3 não trouxe benefício
para os parâmetros reprodutivos avaliados, possivelmente em função do ótimo
desempenho observado durante o período do experimento. / Supplementation of diets of swine females with polyunsaturated fatty acids (PUFA)
containing omega-3, especially the docosahexaenoic acid (DHA) may be an
alternative to improve their reproductive performance. The objective of this study was
to evaluate reproductive performance and serum levels of metabolic marker in swine
females supplemented with omega-3. In this study, 463 swine females were
supplemented in the diet with a source of DHA extracted from microalgae, from the
85th day of gestation and during both the lactation and the weaning-to-estrus interval
(WEI). The DHA was included in the diet at: 3.5; 7.0; 14.0; and 28.0 g/d. Blood
samples were collected at the beginning of the supplementation (during gestation),
ten days after farrowing (during lactation) and one day prior to weaning, for
determination of serum levels of metabolic markers: triglycerides; cholesterol; insulinlike
growth factor type I (IGF-I); and non-esterified fatty acids (NEFA). No effect of the
treatments was observed on the stillborn rate, total litter size and WEI at the parity in
which supplementation occurred (P > 0.05), and also no effect occurred on total litter
size and stillborn rate at the subsequent parity (P > 0.05). During the gestation,
serum levels of cholesterol and IGF-I were lower (P < 0.05) and NEFA serum levels
were greater than during lactation and the WEI (P < 0.05). Also during gestation,
serum triglyceride levels were reduced (P < 0.05) only for females supplemented with
14.0 and 28.0 g of omega-3. The supplementation with DHA did not benefit the
evaluated reproductive parameters of swine females, possibly due to the excellent
performance observed during the experimental period.
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