from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A species of freshwater whitefish endemic to Loch Lomond in Scotland.
from the GNU version of the Collaborative International Dictionary of English
- n. A small British lake whitefish (Coregonus clupeoides, or Coregonus ferus); -- called also gwyniad and lake herring.
from The Century Dictionary and Cyclopedia
- n. Same as pollan.
- n. A name applied to the salmon in parts of Great Britain: equivalent to the Welsh name gwyniad.
Sorry, no etymologies found.
For example, in Loch Lomond in Scotland the invasive ruffe (Gymnocephalus cernuus) eats the eggs of an arctic relict species, the powan (Coregonus lavaretus), thereby threatening this species in one of its only British habitats .
A lake fish, called "ferras," a large species of the salmonid genus _Coregonus_, to which the skelly, powan, and vendayce of British lakes belong, is the commonest fish of the _table d'hôte_, and not very good.
The powan, or fresh-water herring (_Coregonus_), of which there are several marine and fresh-water species.
The perch and grayling spawn in the end of April or the beginning of May; the tench and roach about the middle of June; the common trout and powan in October and November.