blackrider

plural blackriders

1. A small variety of the Arctic char (Salvelinus alpinus)

   The lake is inhabited by two morphs of Arctic charr (Salvelinus alpinus); small-bodied “blackriders” are very numerous, whereas larger “wild-caught charrs” are less frequent

   2012, Liisa Nevalainen, Tomi P. Luoto, “Faunal (Chironomidae, Cladocera) responses to post-Little Ice Age climate warming in the high Austrian Alps”, in Journal of Paleolimnology, volume 48

   1 more example

   All of these high mountain lakes are now inhabited by two morphs of Arctic charr: fish of small body size (so called: 'blackriders') are highly numerous in these lakes and large body size fish (so called: 'wildcaught charrs') which are significantly less numerous.

   2007, D. Zick, H. Gassner, M. Rinnerthaler, P. Jäger, R.A. Patzner, “Application of population size structure indices to Arctic charr Salvelinus alpinus (L.) in Alpine lakes in Austria”, in Ecology of Freshwater Fish

plural blackriders

1. A student who rides in a blackride.

   1 more example

   To rile their professors, South Carolina students staged 'blackrides,' when they blackened their faces, stole the horses of faculty, and galloped about campus while holding flaming torches. After exhausting a horse and drawing a cheering crowd, a 'blackrider' dismounted and slipped into the midst of his fellows to hide from investigation."

   2019, Alan Taylor, Thomas Jefferson's Education, page 97