Foraging habits of spring migrating waterfowl in the upper mississippi river and great lakes region
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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
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 Yüklə 0,59 Mb. Dostları ilə paylaş:
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