Habitat use and feeding ecology of cinnamon teal migrating through the Rio Grande Valley of central New Mexico during spring and fall / Terri Dean Thorn.
Material type:
TextPublication details: Las Cruces, NM : New Mexico State University, 1991.Description: xvii. 104 leaves : ill. ; 29 cmOnline resources: Abstract: Cinnamon teal (Anas cyanoptera) were surveyed and collected from annual [smartweeds (Polygonum spp.), wild millets (Echinochloa spp.), and sprangletop (Leptochloa fascicularis)], saltgrass (Distichlis stricta),alkali/3-square bulrush (Scirpus maritimus/s. americanus) and cattail/hardstem bulrush (Typha spp./S. acutus) habitat types during spring and fall migration periods in 1990 at Bosque del Apache National Wildlife Refuge (NWR). This research was done to determine how cinnamon teal used these habitats during migration and whether invertebrates were major food items consumed by cinnamon teal using these habitat types.The number, sex (spring only) and a percentage estimate of birds engaged in each of 3 activities (courting, resting, feeding) were recorded during a morning and afternoon/evening survey each week. In the laboratory, collected birds were molt scored, had structural measurements taken and carcass composition was measured. All food items in the digestive tract (excluding
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Thesis(M.S.)--New Mexico State University, 1991.
Includes bibliographical references (leaves 95-100).
Cinnamon teal (Anas cyanoptera) were surveyed and collected from annual [smartweeds (Polygonum spp.), wild millets (Echinochloa spp.), and sprangletop (Leptochloa fascicularis)], saltgrass (Distichlis stricta),alkali/3-square bulrush (Scirpus maritimus/s. americanus) and cattail/hardstem bulrush (Typha spp./S. acutus) habitat types during spring and fall migration periods in 1990 at Bosque del Apache National Wildlife Refuge (NWR). This research was done to determine how cinnamon teal used these habitats during migration and whether invertebrates were major food items consumed by cinnamon teal using these habitat types.The number, sex (spring only) and a percentage estimate of birds engaged in each of 3 activities (courting, resting, feeding) were recorded during a morning and afternoon/evening survey each week. In the laboratory, collected birds were molt scored, had structural measurements taken and carcass composition was measured. All food items in the digestive tract (excluding