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      Efeito da inclusão do caroço de algodão sobre o consumo, digestibilidade e balanço da energia em dietas para ovinos Translated title: Effect of levels of whole cottonseed in the diet of sheep on intake, digestibility and energy balance

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          Abstract

          Vinte e cinco carneiros castrados, em delineamento inteiramente ao acaso, foram utilizados para avaliar o efeito de níveis crescentes de inclusão (0, 12, 24, 35 e 45%) de caroço de algodão integral (Gossypium hirsutum) à dieta básica de feno de "Tifton 85" (Cynodon spp.) sobre a digestibilidade aparente da energia bruta, sobre os consumos de energia digestível e metabolizável por unidade de tamanho metabólico, e sobre o balanço energético. O consumo de energia digestível aumentou até o nível de 24% de inclusão de caroço de algodão integral (192,58 Kcal/kg0,75/dia). O balanço energético foi positivo para todas as dietas em virtude do atendimento aos requisitos energéticos de mantença. Os animais que receberam 24% de inclusão do caroço de algodão integral à dieta tiveram maior consumo de energia e melhores digestibilidade e balanço energético.

          Translated abstract

          Twenty five castrated male sheep in a completely randomized design were used to evaluate the effect of increasing level of whole cottonseed (Gossypium hirsutum) (0, 12, 24, 35 and 45%) to a basic diet of Tifton 85's hay (Cynodon spp.) on apparent digestibility of crude energy and consumption of digestible and metabolizable energy per unit of metabolic size and energy balance. Consumption of digestible energy increased to 24% of addition of whole cottonseed (192.58 Kcal/kg0,75/day). Since the energy requirements were supplied, the energy balance was positive for all diets. Animals fed on 24% whole cottonseed diets had higher energy comsuption, digestibility and energy balance.

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          Estatística Aplicada a Experimentação Animal

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            Estatística aplicada à experimentação animal

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              An update on the roles of inhibin, activin, and follistatin as local regulators of folliculogenesis.

              The local actions of the inhibin-related peptides inhibin, activin, and follistatin in folliculogenesis, luteinization and atresia are reviewed. On the basis of in vitro data, it is concluded that (a) inhibin has a paracrine action positively regulating LH-induced androgen production by theca cells in addition to a peripheral role regulating FSH secretion; (b) activin has a negative paracrine action on LH-induced androgen production by theca cells; (c) activin, either alone or with FSH, has an autocrine action on granulosa cells, promoting differentiation during the preantral and early antral stages of folliculogenesis and preventing premature luteinization in the later stages of antral follicle development, leading overall to promotion and maintenance of the folliculogenic state of the follicle; and (d) follistatin modulates granulosa cell function in favor of luteinization or atresia, and its mechanism of action involves neutralizing the actions of activin by its binding properties and by a direct action of follistatin on progesterone metabolism by granulosa cells. A hypothesis for a role of activin in the acquisition of responsiveness of granulosa cells of preantral follicles to FSH is proposed.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                abmvz
                Arquivo Brasileiro de Medicina Veterinária e Zootecnia
                Arq. Bras. Med. Vet. Zootec.
                Universidade Federal de Minas Gerais, Escola de Veterinária (Belo Horizonte )
                1678-4162
                October 2002
                : 54
                : 5
                : 478-484
                Affiliations
                [1 ] Universidade Federal de Minas Gerais Brazil
                Article
                S0102-09352002000500005
                10.1590/S0102-09352002000500005
                f858ee5a-3e1a-44a1-85bf-73e811978c98

                http://creativecommons.org/licenses/by/4.0/

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                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0102-0935&lng=en
                Categories
                VETERINARY SCIENCES

                General veterinary medicine
                Tifton 85,Sheep,fat,energy,Ovino,lipídeos,energia
                General veterinary medicine
                Tifton 85, Sheep, fat, energy, Ovino, lipídeos, energia

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