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ResumoA termometria auditiva vem sendo utilizada para mensuração da temperatura em cães. Porém, existem diferentes conformações da concha acústica nesta espécie, sendo que orelhas pendulares podem alterar o microclima auditivo. Portanto, objetivou-se estudar a diferença das temperaturas retal e do canal auditivo de acordo com a conformação da concha acústica em cães. Foram utilizados 111 cães hígidos com orelhas ereta (grupo I), semipendular (grupo II) e pendular (grupo III) com 37 animais cada. A aferição da temperatura retal (TR) foi realizada com termômetro tradicional coluna de mercúrio e aferição da temperatura de ambas as orelhas externas com termômetro auricular infravermelho. Foi obtida temperatura auditiva média (TAM) e realizada diferença entre TR e TAM, sendo os resultados classificados em escores, A=TAM

In semen cryopreservation, egg yolk is still widely used as a non‐penetrating cryoprotectant. Much has been developed in the search for alternatives for this biological product. This work aimed to evaluate the processed egg yolk through ultracentrifugation and/or sonication in the cryopreservation of swine semen. Twenty‐seven semen doses were purchased from a commercial boar stud and processed for cryopreservation using egg yolk lactose 11% (control) extender, processed using two different methods: high‐speed centrifugation and sonication. Then, they were submitted to freeze‐thawing protocol and were assessed for kinematic and cell structural parameters. Samples in which extenders underwent centrifugation had better results in velocity parameters, meanwhile those that only sonication was performed had poorest results in this parameter. The preservation of the membrane and mitochondria structure had better results when the diluent was only centrifuged in comparison with the other treatments. Therefore, centrifugation of extender containing egg yolk is important for better cryopreservation of swine semen.