Open AccessEffects of Temperature on Feeding Activity of the White River Crayfish Procambarus acutus acutus 1
Author(s) -
Seals C.,
Eversole A. G.,
Tomasso J. R.,
Petrosky B. R.
Publication year - 1997
Publication title -
journal of the world aquaculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0893-8849
DOI - 10.1111/j.1749-7345.1997.tb00848.x
Subject(s) - crayfish , biology , zoology , procambarus clarkii , body weight , water consumption , feed conversion ratio , fishery , endocrinology , environmental engineering , engineering
Feed consumption by white river crayfish Procambarus acutus acutus in a 56‐d laboratory study increased at a linear rate with water temperature over a range of 5 to 25 C. Feed consumption changed as water temperatures were cycled from 20–8–20 C (0.5 C/d) over a 68‐d period and was the highest at the initial 20 C level and the lowest at 8 C. As water temperature increased, feed consumption rate increased; however, consumption never reached the initial rate at 20 C. Crayfish fed 3% and 6% of body weight were significantly larger than animals fed at 1% of body weight after 8 wk. Feed conversion ratios increased significantly with feeding rate. Based on this laboratory study, white river crayfish feed most effectively when water temperature is ≥ 15 C and the feeding rate is 3% of body weight/d.