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Zoology

Eastern Illinois University

1982

Articles 1 - 2 of 2

Full-Text Articles in Life Sciences

Spatiotemporal Distribution And Abundance Of Fry Of Bluegill (Lepomis Macrochirus) And Redear Sunfish (Lepomis Microlophus) With Special Reference To The Effect Of Turbidity On Reproduction, William F. Dimond Jan 1982

Spatiotemporal Distribution And Abundance Of Fry Of Bluegill (Lepomis Macrochirus) And Redear Sunfish (Lepomis Microlophus) With Special Reference To The Effect Of Turbidity On Reproduction, William F. Dimond

Masters Theses

Plexiglass fry traps were used to investigate the abundance and spatiotemporal distribution of bluegill and redear sunfish fry in Ringneck Pond, a small pond in Central Illinois. High spring turbidity delayed spawning of both species. Bluegill fry were more abundant than redear sunfish fry. Small bluegill fry (14 mm to 20 mm TL) inhabited open water more commonly than large bluegill fry (20.5 mm to 26.5 mm TL) but densities of both size groups were highest in a sheltered bay at the north end of the pond. Bluegill fry avoided the surface in open water. Catch rates of ...


Foods And Feeding Of The Redfin Shiner (Notropis Umbratilis) In Coles County, Illinois, Karen Denise High Jan 1982

Foods And Feeding Of The Redfin Shiner (Notropis Umbratilis) In Coles County, Illinois, Karen Denise High

Masters Theses

Foods and diel feeding activities of the redfin shiner, Notropis umbratilis, were studied in Coles County, Illinois in September, 1981, and monthly from April through September, 1982. A total of 200 stomachs with food were examined. Diptera adults and larvae were the most frequently occurring food item (83%), and also occurred in the highest volume (49%). Coleoptera were the second most frequently occurring item (23%), and accounted for the second largest volume (11%). Larger fish consumed a wider variety of food items. Changes in foods with season were also noted.

Feeding activity on the 24-25 July was greatest in the ...