Dictionary » S » Shad



(Science: zoology) Any one of several species of food fishes of the herring family. The American species (Clupea sapidissima), which is abundant on the atlantic coast and ascends the larger rivers in spring to spawn, is an important market fish. The European allice shad, or alose (C. Alosa), and the twaite shad. (C. Finta), are less important species.

Alternative forms: chad.

The name is loosely applied, also, to several other fishes, as the gizzard shad (see under Gizzard), called also mud shad, white-eyed shad, and winter shad. Hardboaded, or yellow-tailed, shad, the menhaden. Hickory, or tailor, shad, the mattowacca. Long-boned shad, one of several species of important food fishes of the bermudas and the west Indies, of the genus Gerres.

(Science: botany) Shad bush, a name given to the North American shrubs or small trees of the rosaceous genus Amelanchier (A. Canadensis, and A. Alnifolia) Their white racemose blossoms open in April or May, when the shad appear, and the edible berries (pomes) ripen in june or july, whence they are called juneberries. The plant is also called service tree, and Juneberry. Shad frog, an American spotted frog (rana halecina); so called because it usually appears at the time when the shad begin to run in the rivers. Trout shad, the squeteague. White shad,the common shad.

Origin: AS. Sceadda a kind of fish, akin to Prov. G. Schade; cf. Ir. & Gael. Sgadan a herring, W. Ysgadan herrings; all perhaps akin to E. Skate a fish.

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[Administrators: feel free to relocate this post at your discretion; with its zoogeographical focus, it could just as aptly lie within the "Evolution" forum.] Looking to this map of global crayfish distribution, one is immediately struck by what are seemingly several discrepancies - namely, the comp...

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by Shagreen
Fri Mar 25, 2005 12:56 am
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Topic: Global Crayfish Distribution and Interspecific Competition
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