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Human disturbances of waterfowl: causes, effects, and management
Human disturbances of waterfowl can be intentional or unintentional. They may result from overt or directed activities or may be ancillary to activities not initially thought to be of concern to birds. Some of these disturbances are manifested by alertness, fright (obvious or inapparent), flight, swimming, disablement, or death. Therefore, persons responsible for waterfowl management areas should be aware of the problems from human disturbance and should design management and facilities that increase public appreciation of waterfowl.
Increasing waterfowl nesting success on islands and peninsulas
Waterfowl that nest in uplands in the prairie pothole region have had low recruitment rates in recent decades, primarily because of predation. The loss of breeding waterfowl and their progeny has generated interest in management techniques that safeguard incubating hens and their eggs. Developing islands and peninsulas for nesting waterfowl has potential because these sites are naturally attractive to breeding ducks and geese. In fact, dense nesting colonies of ducks developed on some islands when successful females and a portion of their female progeny returned in subsequent years. Managers have successfully duplicated the beneficial attributes of islands by developing various nesting habitats that are protected by water barriers. This chapter addresses the management of existing islands, the creation of new islands, and the modification of peninsulas into islands to increase nesting success in waterfowl.
Construction and operation of cable-chain drag for nest searches
A list of materials necessary to build and use a 53-m-long cable-chain drag is presented. Techniques are described for searching, finding, and marking nests in a typical area of grassland.During nine nesting seasons, 7,894 nests representing 32 species were found by searching fields with cable-chain drags. Only 2% of the nests were damaged while searching; most of this damage was caused by the searcher or the vehicle, and not by the drag.The rate of nest abandonment caused by cable-chain searching was estimated to be less than 1%. Reflushing efficiency ranged from 25% for green-winged teal (Anas crecca) to 100% for shorebirds. Other uses of the cable-chain drag are also discussed.
The ecology of Malheur Lake and management implications
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Infectious hematopoietic necrosis (IHN) virus disease
No abstract available at this time
Approved procedure for determining absence of infectious pancreatic necrosis (IPN) virus in certain fish and fish products
No abstract available at this time
Parasites of freshwater fish IV: Miscellaneous; 4; Parasitic copepods Ergasilus, Achtheres, and Salmincola
No abstract available at this time
Parasites of freshwater fish IV: Miscellaneous: 3: Parasitic copepod Argulus
No abstract available at this time
Brown blood disease (methemoglobinemia) of fishes
No abstract available at this time
Ceratomyxa shasta, a myxosporean parasite of salmonids
No abstract available at this time
Fin rot, coldwater disease, and peduncle disease of salmonid fishes
No abstract available at this time
Hagerman redmouth, a disease of salmonids caused by a member of the enterobacteriaceae
No abstract available at this time
Infectious diseases of cultured fishes: current perspectives
No abstract available at this time
Aeromonas hydrophila and motile aeromonad septicemias of fish
No abstract available at this time