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The allis shad is a typical herring-type fish. It has no lateral line and a somewhat rounded belly. The gill cover is ridged and the scales large. The back is a bluish-green colour and the head brownish with a golden tinge on the operculum. The flanks are silvery, sometimes with a bronzy tinge, and a distinctive large dark spot occurs just ...
The Alosidae, or the shads, [2] [3] [4] are a family of clupeiform fishes. The family currently comprises four genera worldwide, and about 32 species. The family currently comprises four genera worldwide, and about 32 species.
Shads are thought to be unique among the fishes in having evolved an ability to detect ultrasound (at frequencies above 20 kHz, which is the limit of human hearing). [7] This was first discovered by fisheries biologists studying a type of shad known as blueback herring , and was later verified in laboratory studies of hearing in American shad.
The twait shad is a typical herring-type fish and much resembles the allis shad. It has no lateral line and the belly is more rounded than that of the sprat and Baltic herring. The gill cover is ridged and the caudal peduncle has large, plate-like scales. This fish is more colourful than the Baltic herring.
Aber Taf is listed as an SSSI for its saltmarsh vegetation, and for two sorts of migratory fish, allis shad (Alosa alosa) and twaite shad (Alosa fallax), as well as for the wider marine and intertidal habitats of the area which support wintering wildfowl. The site has a number of graduated zones of saltmarsh, their composition and species ...
An Annotated and Illustrated Catalogue of the Herrings, Sardines, Pilchards, Sprats, Shads, Anchovies and Wolf-Herrings. FAO Fish. Synop. 125(7/1): 1–303. Rome: FAO. Quigley, D. T. G. series of papers in Irish Naturalists' Journal and records of rare marine fish species taken in Irish waters by fishing vessels and sea anglers from 1786 to 2008.
Alosa alosa — Allis shad; Alosa caspia — Caspian shad; Alosa immaculata — Pontic shad; Alosa kessleri — Caspian anadromous shad; Clupeonella.
The Killarney shad [2] [3] (Alosa killarnensis), also called the goureen, is a freshwater fish in the family Alosidae, endemic to a single lake in Ireland, Lough Leane in County Kerry. Research has shown that it is a landlocked subspecies of the anadromous , twait shad ( Alosa fallax ), arriving in the lake after the Last Glacial Maximum about ...