Dusky smooth-hound time to induce tonic immobility in smooth dogfish was 32.5 seconds. The mean duration of the tonic immobility was 61.9 seconds. Sharks that had the “limp” response also exhibited tonic immobility. The “limp” response is a criterion for the onset of tonic immobility. Dusky smooth-hound The dusky smooth-hound ("Mustelus canis"), also called the smooth dogfish or the dog shark, is a species of houndshark in the family Triakidae. This shark is an olive grey or brown in color, and may have shades of yellow or grayish white. Females live to 16 years and males have a lifespan of 10 years.
Posavac Hound Posavac Hound The Posavac Hound (FCI No. 154) (Croatian: "posavski gonič") is a breed of dog, originating as a hunting dog of the scenthound type. Croatia is the home country for the breed. The name translates into English as the "Scenthound From The Sava Valley", but is usually translated as the Posavac Hound. The Posavac Hound is a solidly built dog with a somewhat long body, close-fitting drop ears, a long tail, and a gentle expression. The breed has an ideal height around 50 cm (20 ins) at the withers. The short, flat coat is slightly longer on the belly