CHARACTERISTICS OF INVERTEBRATES CONSUMED BY MALLARDS AND PREY RESPONSE TO WETLAND FLOODING SCHEDULES

被引：47

作者：

BATZER, DP ^{[1
]}

MCGEE, M ^{[1
]}

RESH, VH ^{[1
]}

SMITH, RR ^{[1
]}

机构：

[1] UNIV CALIF BERKELEY,DEPT ENTOMOL SCI,BERKELEY,CA 94720

来源：

WETLANDS | 1993年 / 13卷 / 01期

关键词：

AMPHIPODA; CALIFORNIA; CHIRONOMIDAE; CORIXIDAE; DUCK; DYTISCIDAE; GREEN-WINGED TEAL; HYDROPHILIDAE; INVERTEBRATE; MACROINVERTEBRATE; MALLARD; MARSH; MIDGE; OSTRACODA; WATERFOWL; WETLAND;

D O I：

10.1007/BF03160864

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

We examined characteristics of the invertebrates consumed by mallards (Anas platyrhynchos) and green-winged teals (Anas crecca) and responses of these invertebrates to manipulations of flooding date in Suisun Marsh, Solano County, CA. Numbers of Chironomus stigmaterus midge larvae (Chironomidae) and Eogammarus confervicolus amphipods (Gammaridae) in mallard esophageal samples were positively correlated with abundance of these invertebrates in wetlands. Mallards primarily consumed large midge larvae (fourth instars) and amphipods (>5 mm in length). Smaller green-winged teals consumed smaller midges. Mallards consumed few Trichocorixa verticalis water boatmen (Corixidae) or Cricotopus sylvestris midge larvae, despite their being abundant. Wetlands first flooded in early September had higher winter populations of amphipods and Berosus ingeminatus beetle larvae (Hydrophilidae) than wetlands first flooded in late October. Late-winter abundance of benthic C. stigmaterus midge larvae was highest at 40-cm water depths in the former habitats and at 20-cm depths in the latter habitats.

引用

页码：41 / 49

页数：9

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