Movement ecology of five Afrotropical waterfowl species from Malawi, Mali and Nigeria

Ostrich
By: , and 

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Abstract

Habitat availability for Afrotropical waterbirds is highly dynamic with unpredictable rainfall patterns and ephemeral wetlands resulting in diverse movement strategies among different species. Movement strategies among waterfowl encompass resident, regional and intercontinental migrants, but little quantitative information exists on their specific movement patterns. We studied the movement ecology of five Afrotropical waterfowl species marked with satellite transmitters in Malawi, Mali and Nigeria. Resident species, including White-faced Whistling Ducks Dendrocygna viduata, Fulvous Whistling Ducks Dendrocygna bicolor and Spur-winged Geese Plectropterus gambensis, remained sedentary during the rainy season and only flew limited distances during other months. In contrast, Knob-billed Ducks Sarkidiornis melanotos made short regional movements >50 km in all months and showed little site fidelity to previously used habitats in subsequent years. Garganey Anas quequedula followed an intercontinental strategy and made long-distance jumps across the Sahara and Mediterranean to their Eurasian breeding grounds. Most species flew farthest during the dry season, as mean daily movements varied from 1.5 to 14.2 km and was greatest in the winter months (January-March). Total distance moved varied from 9.5 km for White-faced Whistling Ducks (October-December) to 45.6 km for Knob-billed Ducks (April-June). Nomadic behaviour by Knob-billed Ducks was evidenced by long exploratory flights, but small mean daily movements suggested that they were relying on previous experience. Improving our understanding of these movement strategies increases our ability to assess connectivity of wetland resources that support waterfowl throughout their annual cycle and focuses conservation efforts on their most important habitats.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Movement ecology of five Afrotropical waterfowl species from Malawi, Mali and Nigeria
Series title Ostrich
DOI 10.2989/00306525.2015.1033773
Volume 86
Issue 1-2
Year Published 2015
Language English
Publisher Taylor & Francis
Publisher location London
Contributing office(s) Western Ecological Research Center
Description 14 p.
First page 155
Last page 168
Country Malawi, Mali, Nigeria
Other Geospatial Hadejia-Nguru Wetlands, Inner Niger Delta, Lake Chad Basin, Lake Chilwa
Online Only (Y/N) N
Additional Online Files (Y/N) N