74 



James C. Widlak and Richard J. Neves 



Table 2. Actual and back-calculated lengths (linear regression) at capture for 

 redline darters, North Fork Holston River, May 1981-May 1982. 



Sex 





Actual 



Back-calculated 



and age 



N 



length (mm) 



(mm) 



Males 





I 



54 



43.6 



44.8 



II 



49 



58.1 



56.9 



III 



19 



65.7 



65.7 



IV 



4 



76.7 



75.6 



Females 









I 



34 



41.9 



43.0 



II 



30 



54.7 



53.3 



III 



1 



67.0 



65.2 



Table 3. Numerical abundance and percent of total number of food items for 

 different categories of food in 546 redline darter stomachs, 1981-1982. 



Food 



Dec-Feb 



(N=10) 



No. % 



Mar-May 

 (N=36) 



No. % 



Jun-Aug* 



(N=377) 

 No. % 



Sep 

 (N= 



No. 



-Nov 

 123) 



% 



Diptera 



















Chironomidae 



120 



86.3 



208 



65.6 



1665 



59.8 



855 



62.9 



Simuliidae 



1 



0.7 



25 



7.9 



203 



7.3 



171 



12.6 



Other 



- 



- 



5 



1.6 



36 



1.3 



11 



0.8 



Ephemeroptera 



















Baetidae 



5 



3.6 



19 



6.0 



212 



7.6 



75 



5.5 



Heptageniidae 



1 



0.7 



8 



2.5 



118 



4.2 



25 



1.8 



Siphlonuridae 



- 



- 



11 



3.5 



98 



3.5 



55 



4.0 



Other 



1 



0.7 



7 



2.2 



4 



0.1 



5 



0.4 



Trichoptera 



















Hydropsychidae 



2 



1.4 



5 



1.6 



130 



4.7 



79 



5.8 



Hydroptilidae 



6 



4.3 



6 



1.9 



130 



4.7 



14 



1.0 



Other 



- 



- 



5 



1.6 



29 



1.0 



11 



0.8 



Plecoptera 



- 



- 



- 



- 



5 



0.1 



- 



- 



Coleoptera 



- 



- 



- 



- 



8 



0.2 



3 



0.3 



Hydracarina 



3 



2.2 



16 



5.1 



122 



4.4 



56 



4.1 



Nematomorpha 



- 



- 



2 



0.6 



- 



- 



- 



- 



Empty stomachs 



1 



10.0 



2 



5.6 



37 



9.8 



14 



11.4 



Totals 



139 



100 



317 



100 



2784 



100 



1360 



100 



* Crayfish, fish eggs, and 



unidentified invertebrate eggs 



were collected 



in a few 



stomachs during this period. 















