| swimming speed | <marine biology> Swimming speeds of stream fish vary from essentially zero to over six metres per second, depending upon species, size, and activity. Three categories of performance are generally recognised: 1. Burst (darting) speed: The speed that a fish can maintain for a very short time, generally 5 to 10 seconds, without gross variation in performance. Burst speed is employed for feeding or escape, and represents maximum swimming speed. 2. Cruising speed: The speed that a fish can maintain for an extended period of time without fatigue. This implies a lack of stress, and is the maximum speed traveled by undisturbed individuals. 3. Sustained (prolonged) speed: The speed that a fish can maintain for a prolonged period, but which ultimately results in fatigue. at this speed the fish is under some degree of stress. (19 Jan 1998) |
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| swimming test | A test for activity of adrenal cortical preparations; two days after adrenalectomy, rats are placed in water and the time during which they can swim is recorded; they are then injected with the material to be tested; the response is termed "positive" if the swimming time is doubled. (05 Mar 2000) |
| swine | <zoology> Any animal of the hog kind, especially one of the domestical species. Swine secrete a large amount of subcutaneous fat, which, when extracted, is known as lard. The male is specifically called boar, the female, sow, and the young, pig. See Hog. "A great herd of swine." Swine grass, the sow thistle. Origin: OE. Swin, AS. Swin; akin to OFries. & OS. Swin, D. Zwijn, G. Schwein, OHG. Swin, Icel. Svin, Sw. Svin, Dan. Sviin, Goth. Swein; originally a diminutive corresponding to E. Sow. See Sow. Source: Websters Dictionary (01 Mar 1998) |
| swine diseases | Diseases of domestic swine and of the wild boar of the genus sus. (12 Dec 1998) |
| swine dysentery | An acute haemorrhagic colitis of swine, often accompanied by gastritis; the small intestines usually are not involved; its primary cause is Treponema hyodysenteriae, and it has a high mortality rate, especially among feeder pigs. (05 Mar 2000) |
| swine encephalitis virus | A coronavirus, in the family Coronaviridae, that causes swine encephalitis. (05 Mar 2000) |
| swine erysipelas | An acute and chronic contagious disease of young pigs caused by erysipelothrix insidiosa. (12 Dec 1998) |
| swine fever | An acute, highly contagious disease affecting swine of all ages and caused by the hog cholera virus. It has a sudden onset with high morbidity and mortality. (12 Dec 1998) |
| swine fever virus | A species of the pestivirus genus causing exceedingly contagious and fatal haemorrhagic disease of swine. (12 Dec 1998) |
| swine icteroanaemia | An infectious disease of swine manifested by icterus, anaemia, and emaciation; caused by Eperythrozoon suis. (05 Mar 2000) |
| swine infertility and respiratory syndrome virus | A species of arterivirus causing reproductive and respiratory disease in pigs. The european strain is called lelystad virus. Airborne transmission is common. (12 Dec 1998) |
| swine influenza | An acute respiratory disease of swine caused by strains of influenza virus type A; it is believed to have become adapted to swine in the United States during the great human pandemic in 1918; fatal cases, as in such cases of pandemic influenza in man, are commonly associated with secondary bacterial pneumonia. (05 Mar 2000) |
| swine influenza viruses | Strains of influenza virus type A which cause influenza of swine and can infect humans. (05 Mar 2000) |
| swine pest | An acute, highly contagious disease affecting swine of all ages and caused by the hog cholera virus. It has a sudden onset with high morbidity and mortality. (12 Dec 1998) |
| swine porphyria | Porphyria as a dominant trait seen in swine. (05 Mar 2000) |