3 research outputs found

    Efeito do pastejo rotacionado e alternado com bovinos adultos no controle da verminose em ovelhas Effect of rotational and alternate grazing with adult cattle on the control of nematode parasites in sheep

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    Estudaram-se os efeitos do pastejo alternado de ovinos e bovinos e do pastejo rotacionado sobre o controle da verminose em ovelhas. Utilizou-se uma 谩rea experimental composta por tr锚s m贸dulos de 1,67ha cada. Os m贸dulos foram subdivididos em oito piquetes. Vinte ovelhas foram colocadas no m贸dulo 1 e quatro bovinos adultos no m贸dulo 2. Os animais permaneceram em cada piquete do m贸dulo por cinco dias, totalizando 40 dias de perman锚ncia em cada m贸dulo. Ao final desse per铆odo, as ovelhas foram transferidas para o m贸dulo onde estavam os bovinos e estes para o m贸dulo onde estavam os ovinos, mantendo esse esquema at茅 o final do experimento. Um grupo-controle de 20 ovelhas foi mantido, tamb茅m em sistema rotacionado, em um terceiro m贸dulo, sem compartilhar a pastagem. As ovelhas submetidas ao manejo com bovinos apresentaram o menor grau de infec莽茫o por nemat贸deos gastrintestinais e os maiores valores de volume globular. O pastejo rotacionado de ovinos, sem a utiliza莽茫o de bovinos, n茫o foi eficiente no controle da verminose das ovelhas. A utiliza莽茫o do pastejo rotacionado e alternado de ovinos e bovinos adultos exerceu efeito ben茅fico significativo no controle da verminose ovina.<br>The effects of rotational and alternate grazing involving cattle and sheep on the control of nematode parasites in sheep were evaluated. Three areas with 1.67ha were subdivided into eight paddocks each. Twenty ewes and four cattle were allotted to areas 1 and 2, respectively. They grazed during five days in each of eight paddocks of each area. The sheep and cattle rotated in each area for 40 days. At the end of this period, ewes were transferred to the area where cattle were previously kept and these animals were transferred to the area where sheep had previously grazed. This arrangement was kept until the end of the experiment. A control group with 20 ewes rotated in the third area, also with eight paddocks. Ewes that alternately grazed with cattle showed the lowest fecal egg counts and the highest values of packed cell volume. The rotational grazing of sheep, without cattle, was not efficient to control gastrointestinal nematodes. The alternate grazing of sheep and cattle resulted in a reduction of parasitic infection in the ewes

    Diapause in parasitic nematodes: a review

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