Main Ref. | Johnson, J.H. and D.S. Dropkin, 1995 | ||
Fish stage | adults | Mean length | 20.80 TL |
Sample size | 28 | Percent empty | 54 |
Country | USA | Locality | Juniata River, Pennsylvania, 1990 |
Period |
|
Diet percent | Food I | Food II | Food III | Prey stage | Item Name | Comments |
---|---|---|---|---|---|---|
1.60 % | zoobenthos | insects | insects | nymphs | Baetidae | Baetidae |
2.50 % | zoobenthos | insects | insects | nymphs | Hydropsychidae | Hydropsychidae |
4.90 % | zoobenthos | insects | insects | nymphs | Heptageniidae | Heptageniidae |
5.00 % | zoobenthos | insects | insects | nymphs | Trichoptera | misc. Trichoptera |
14.30 % | zoobenthos | insects | insects | nymphs | insects | terrestrial insects |
17.40 % | zoobenthos | insects | insects | nymphs | Potamanthidae | Potamanthidae |
37.30 % | zoobenthos | insects | insects | nymphs | Ephemeridae | Ephemeridae |
17.00 % | zoobenthos | benth. crust. | n.a./other benth. crustaceans | juv./adults | Decapoda | Decapoda |