Microcrustacea tr. 3.0
Cladocera tr. 2.9
Annelida 1.0 0.0
Non-Dipteran Insects 2.5 3.5
Caenidae 1.9 tr.
Coenagrionidae 0.4 0.4
Hydrobiidae 0.0 2.7
Miscellaneous / Unknown tr. 7.5
Table A24 continued.
______________________________________________________________________________________
2006 2007
Food Item Agg. % Agg. %
______________________________________________________________________________________
Bryozoan 0.0 7.5
Total Seed 25.9 10.5
Ceratophyllum sp. 4.8 1.0
Chenopodium sp. 0.1 2.0
Cyperus sp. 1.8 0.3
Impatiens sp. 4.3 0.0
Polygonum sp. 0.5 1.7
Potamogeton sp. 7.9 2.6
Scirpus sp. tr. 1.5
Unknown Seeds 6.2 tr.
______________________________________________________________________________________
Table A25. Aggregate percent biomass of food items in ring-necked ducks collected at the Cache River study site in spring 2006 (n = 13) and 2007 (n = 24). If food items were <0.1% they were listed as trace (tr.).
______________________________________________________________________________________
2006 2007
Food Item Agg. % Agg. %
______________________________________________________________________________________
Total Vegetation 0.7 7.7
Chara sporangia 0.0 3.7
Other Vegetation 0.7 3.9
Total Animal Matter 0.5 6.0
Gastropoda 0.0 4.3
Physidae 0.0 0.2
Planorbidae 0.0 4.1
Bivalvia 0.0 0.3
Chironomidae tr. 0.4
Non-Chironomidae Dipterans 0.0 0.2
Macrocrustacea 0.0 tr.
Annelida 0.0 tr.
Non-Dipteran Insects 0.4 0.7
Libellulidae 0.4 0.2
Corixidae 0.0 0.3
Total Agricultural Seed (corn) 6.9 3.9
Total Non-Agricultural Seed 92.0 82.4
Ceratophyllum sp. 0.0 5.0
Echinochloa sp. 41.3 26.0
Ludwigia sp. 0.0 8.1
Panicum sp. 38.3 3.7
Polygonum sp. 7.7 10.3
Potamogeton sp. 0.2 11.9
Scirpus sp. 0.0 2.1
Table A25 continued.
______________________________________________________________________________________
2006 2007
Food Item Agg. % Agg. %
______________________________________________________________________________________
Setaria sp. 2.4 0.0
Unknown Seeds 1.6 0.0
Tubers 0.0 13.9
______________________________________________________________________________________
Table A26. Aggregate percent biomass of food items in ring-necked ducks collected at the Illinois River study site in spring 2006 (n = 11) and 2007 (n = 10). If food items were <0.1% they were listed as trace (tr.).
______________________________________________________________________________________
2006 2007
Food Item Agg. % Agg. %
______________________________________________________________________________________
Total Vegetation 0.0 0.6
Total Animal Matter 9.4 9.7
Gastropoda 0.0 5.2
Physidae 0.0 5.2
Chironomidae 0.0 tr.
Macrocrustacea 9.4 tr.
Isopoda 9.4 tr.
Annelida tr. 0.0
Non-Dipteran Insects 0.0 4.3
Hydrophilidae 0.0 4.3
Total Agricultural Seed (corn) 0.0 9.4
Total Non-Agricultural Seed 90.6 80.4
Amaranthus sp. 28.3 tr.
Bidens sp. 0.0 1.0
Ceratophyllum sp. 0.0 1.1
Cyperus sp. 30.4 0.4
Echinochloa sp. 2.7 4.9
Leersia sp. 0.0 26.9
Panicum sp. 0.0 2.0
Polygonum sp. 20.3 38.6
Unknown Seeds 1.0 4.5
Tubers 7.3 0.0
______________________________________________________________________________________
Table A27. Aggregate percent biomass of food items in ring-necked ducks collected at the Wisconsin study site in spring 2006 (n = 3) and 2007 (n = 12). If food items were <0.1% they were listed as trace (tr.).
______________________________________________________________________________________
2006 2007
Food Item Agg. % Agg. %
______________________________________________________________________________________
Total Vegetation 0.0 1.4
Total Animal Matter 0.2 0.4
Chironomidae 0.0 0.4
Annelida 0.2 0.0
Total Seed 99.8 98.2
Bidens sp. 3.7 1.0
Ceratophyllum sp. 33.3 0.0
Cyperus sp. 6.3 0.0
Eleocharis sp. 8.4 0.4
Phalaris sp. 0.0 5.1
Polygonum sp. 23.3 9.9
Potamogeton sp. 24.8 66.8
Scirpus sp. 0.0 13.0
Tubers 0.0 1.1
______________________________________________________________________________________
Table A28. Aggregate percent biomass of food items in ring-necked ducks collected at the Scioto River study site in spring 2006 (n = 7) and 2007 (n = 26). If food items were <0.1% they were listed as trace (tr.).
______________________________________________________________________________________
2006 2007
Food Item Agg. % Agg. %
______________________________________________________________________________________
Total Vegetation 4.2 12.1
Chara sporangia 3.6 11.8
Other Vegetation 0.6 0.0
Total Animal Matter 12.4 27.9
Gastropoda 8.0 0.1
Physidae 7.0 tr.
Planorbidae 1.0 tr.
Chironomidae tr. 22.3
Non-Chironomidae Dipterans 0.2 0.1
Annelida tr. 4.7
Non-Dipteran Insects 4.1 0.7
Libellulidae 4.0 0.0
Total Seed 83.4 60.0
Amaranthus sp. 1.6 3.6
Cyperus sp. tr. 8.1
Echinochloa sp. 0.0 6.2
Leersia sp. 0.0 3.2
Najas sp. 41.5 0.0
Poaceae sp. 0.0 3.8
Polygonum sp. 14.4 16.2
Potamogeton sp. 11.9 15.3
Trifolium sp. 14.0 0.0
Tubers 0.0 1.0
______________________________________________________________________________________
Table A29. Aggregate percent biomass of food items in ring-necked ducks collected at the Lake Erie study site in spring 2006 (n = 36) and 2007 (n = 25). If food items were <0.1% they were listed as trace (tr.).
______________________________________________________________________________________
2006 2007
Food Item Agg. % Agg. %
______________________________________________________________________________________
Total Vegetation 9.9 9.2
Ceratophyllum 4.1 0.0
Lemna tr. 0.4
Chara sporangia 2.7 tr.
Other vegetation 3.0 8.7
Total Animal Matter 6.1 14.7
Fish 0.0 3.9
Gizzard Shad 0.0 3.9
Gastropoda 1.4 0.6
Lymnaeidae tr. 0.0
Physidae 0.7 0.6
Planorbidae 0.6 0.0
Chironomidae 1.8 5.3
Non-Chironomidae Dipterans tr. 0.0
Macrocrustacea 0.0 tr.
Annelida tr. 2.1
Non-Dipteran Insects 2.9 2.8
Coenagrionidae tr. 1.5
Phryganeidae 2.3 1.2
Total Agricultural Seed (corn) 2.7 0.0
Total Non-Agricultural Seed 81.3 76.0
Ceratophyllum sp. 0.2 1.3
Cyperus sp. 2.7 6.2
Echinochloa sp. 22.1 9.1
Table A29 continued.
______________________________________________________________________________________
2006 2007
Food Item Agg. % Agg. %
______________________________________________________________________________________
Leersia sp. 13.3 10.6
Myriophyllum sp. 1.3 0.0
Panicum sp. 6.1 2.5
Polygonum sp. 21.0 27.0
Potamogeton sp. 4.6 8.0
Scirpus sp. 5.5 7.5
Unknown Seeds 2.5 2.4
______________________________________________________________________________________
Table A30. Aggregate percent biomass of food items in ring-necked ducks collected at the Saginaw Bay study site in spring 2006 (n = 15) and 2007 (n = 22). If food items were <0.1% they were listed as trace (tr.).
______________________________________________________________________________________
2006 2007
Food Item Agg. % Agg. %
______________________________________________________________________________________
Total Vegetation 27.8 9.6
Lemna 1.2 tr.
Wolffia 0.0 4.2
Other Vegetation 26.6 5.3
Total Animal Matter 42.1 58.4
Gastropoda 5.5 4.1
Lymnaeidae tr. 0.2
Physidae 4.7 1.6
Planorbidae 0.5 2.2
Bivalvia 0.0 6.9
Dreissenidae 0.0 6.9
Chironomidae 35.7 18.5
Non-Chironomidae Dipterans tr. 0.0
Macrocrustacea 0.4 1.6
Amphipoda 0.4 1.5
Microcrustacea tr. 0.0
Annelida tr. 0.5
Non-Dipteran Insects 0.4 6.3
Ephemeridae 0.0 0.7
Coenagrionidae tr. 5.3
Miscellaneous / Unknown 0.0 20.6
Bryozoan 0.0 16.0
Total Seed 30.1 32.0
Amaranthus sp. 12.1 tr.
Table A30 continued.
______________________________________________________________________________________
2006 2007
Food Item Agg. % Agg. %
______________________________________________________________________________________
Ceratophyllum sp. 8.0 4.5
Myriophyllum sp. 4.8 3.8
Najas sp. tr. 6.8
Potamogeton sp. 4.6 0.3
Scirpus sp. 0.0 6.9
Unknown Seeds 0.0 0.2
Tubers 0.0 8.9
______________________________________________________________________________________
VITA
Graduate School
Southern Illinois University
Arthur N. Hitchcock, Jr. Date of Birth: May 20, 1981
1987 Lincolnshire Blvd., Ridgeland, MS 39157
Mississippi
State University
Bachelor of Science, Wildlife and Fisheries Science, May 2005
Southern Illinois University Carbondale
Master of Science, Zoology, December 2008
Thesis Title:
Diets of Spring-Migrating Waterfowl in the Upper Mississippi River
and
Great Lakes Region
Major Professor: Michael W. Eichholz