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.
Basset Hound Basset Hound descends from French dogs that were bred in Great Britain in the late 1800s. The earliest-known depictions of short-legged hunting dogs are engravings from the Middle Kingdom of Egypt. Mummified remains of short-legged dogs from that period have been uncovered in the Dog Catacombs of Saqqara, Egypt. Scent Hounds were used for hunting in both Ancient Greece and Ancient Rome. The basset type originated in France, and is descended from the 6th century hounds belonging to St Hubert of Belgium, which through breeding at the Benedictine Abbey of St. Hubert eventually became what is known as the St