Comportamento materno-filial em búfalos (Bubalus bubalis) nas primeiras horas após o parto

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Vivências e repercussões psíquicas da mulher na gestação de risco: um estudo sobre a pré eclâmpsia e o vínculo materno-filial

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Caracterização citogenética das espécies matrinxã (Brycon amazonicus), piraputanga (Brycon hilarii) e sua geração filial, utilizados na piscicultura brasileira

Pós-graduação em Ciências Biológicas (Zoologia) - IBB

Suckling and allosuckling in river buffalo calves and its relation with weight gain

The aim of the present study was to investigate if river buffalo calves (Bubalus bubalis) have equal access to all cows and if milk is thus equally available to all of them. We recorded suckling/allosuckling behaviour and weight gain (WG) of 29 calves (14 males and 15 females), with special consideration to their sex, birth order (BO) and age. Cows' nursing behaviour and milli production (MP) were also considered. While males tended to be born earlier than females during this study, this was not the trend in the overall herd records. The cows' MP was not effected by the calves' sex. However, bull-calves presented greater mean WG, and mean times spent in individual filial (IF) and in communal nonfilial (CNF) suckling than heifer-calves, which showed greater communal filial (CF) suckling than the former during the first 4 months of life. The WG was associated with IF for bull-calves (r = 0.680 and 0.765, respectively, for the periods from birth to 4th and 8th months of age), and to CNF for heifer-calves (r = 0.628, for the period from birth to 8th month). Results from multiple regression analysis showed independent effects of each suckling category on the calf WG, and such effects were variable according to the calf's sex. BO was negatively correlated to calves' WG (bull-calves: r(s) = - 0.873 and - 0.799, from birth to 4th and gth months, respectively; heifer-calves: r(s) = - 0.531 from birth to 4th month). Specifically for bull-calves, there was a positive correlation between BO and MP (r(s) = 0.528 and 0.633, from birth to 4th and 8th months of age, respectively). The correlation between BO and IF was negative in both sexes, indicating that calves that were born early had more opportunities to suckle individually from their mothers. For heifer-calves, BO was positively correlated with CF (two periods), and negatively with CNF (from birth to 8th month of age), suggesting that heifer-calves were most often accompanied by other calves during suckling when they were born later. The data taken together indicate that sex and/or BO influenced decisively social interactions during suckling, promoting differential development among the calves. In animal husbandry, if a homogenous WG is desired, these factors have to be taken into consideration. (C) 2000 Elsevier B.V. B.V. All rights reserved.

Supernumerary chromosome inheritance in the curimbata (Prochilodus lineatus) of the Mogi-Guacu River

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Avaliação do custo, produtividade e geração de emprego no corte de cana-de-açúcar, manual e mecanizado, com e sem queima prévia

Pós-graduação em Agronomia (Energia na Agricultura) - FCA

Fatores intervenientes no comportamento de vacas e bezerros do parto até a primeira mamada

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Comportamento de vacas e bezerros Girolandos em pastagem e sua relação com o nível de cortisol fecal como indicador de estresse

Pós-graduação em Zootecnia - FCAV

Communal suckling in water buffalo (Bubalus bubalis)

Communal nursing (an adult female allowing the offspring of another conspecific female to suckle) is a relatively frequent behavior in water buffalo (Bubalus bubalis). Fourteen lactating water buffalo cows and their nursing calves were observed at a Brazilian dairy after the cows had been milked. The two variables of greatest interest were solicitations of their own mothers and other cows by the calves, and acceptances of their own offspring and non-filial calves by the cows. Correlational analyses suggested three easily discriminable clusters of variables. Calves solicited and succeeded in suckling from their own mothers more often than they did from any other individual cow, but they solicited all other cows slightly more often than they did their own mothers. They were more likely to try to suckle other cows if they were rejected by their own mothers. Cows that had a high probability of accepting their own offspring tended to accept non-filial calves as well. Calves tended to maximize the total number rather than the probability of successful solicitations. Communal suckling was not reciprocal. Communal and filial suckling results from encounters between cows and calves performing under different motivational states. © 1991.

Allonursing in river buffalo, Bubalus bubalis: Nepotism, incompetence, or thievery?

Allonursing was investigated in a dairy herd of 30 river buffalo cows and their calves. The primary behavioural variables were solicitations of allonursing by calves and acceptances of calves by cows. The sample of cows included a group of nine half-sisters, two additional pairs of half-sisters, and a pair of full-sisters. All of the calves were half-siblings owing to putative common paternity. Ancillary variables were age, milk-yield and docility of cows, as well as age, sex, weight and growth rate of calves. Three hundred and fifty-one instances of allonursing and 341 of filial nursing were recorded. There were large individual differences in the cows' tendencies to accept their own offspring and non-filial calves, and for the calves to successfully solicit milk from their mothers and other cows. Thirteen of the 30 cows accounted for 97% of the allonursing. Frequent allonursing was correlated with decreased growth rate in the donors' calves. Allonursing was unrelated to kinship or reciprocal relationships among the cows, and was associated with a lack of maternal experience in young cows and apparent milk theft by hungry calves whose mothers were not providing them with sufficient milk. © 1995 The Association for the Study of Animal Behaviour.

Inovação tecnológica em projetos de novos produtos: um estudo exploratório sobre relações gerenciais de integração entre unidades de uma multinacional

Although thetopic of integrationin product development is widely debated in the literature, there are few studies that address the participation by subsidiaries of multinational and R & D centers around the world in development projects of new products. Focusing on the perception of the Brazilian unit, this paper aims to present and analyze integration practices among subsidiaries, headquarters and R&D centers in product development projects in amultinational high tech company. For this purpose, was conducted an exploratory and qualitative researched operationalized by case study. Among the main results, it was noted collaboration betweenlocals marketing and engineering with the R & D centers, important role of senior management in the Brazilian unit to communicate outcomes of the strategic planning of products andtechnologies established by the headquarters to the subsidiary, the adoption of technological and information mechanisms and the application of methods such as technology roadmap.