In the shorebird subfamily Calidridinae, one of the parents shortens parental care and initiates ... more In the shorebird subfamily Calidridinae, one of the parents shortens parental care and initiates southward migration before the other. We estimated the difference in passage date between male and female western sandpipers (Calidris mauri) at their first major stopover on the southward migration from breeding areas in Alaska, in 18 years between 1978 and 2000. Overall, adult females preceded adult males by 1.22 days. A novel finding was that among juveniles, which migrate approximately a month later than adults, females preceded males by similar magnitude (1.14 days). There was wide variation among years, however, and males actually preceded females in years with late hatch. We relate these findings to hypotheses for female-first southward migration in sandpipers.
... ACTION Guillermo Fernández1 & David B. Lank2 ... tion. Individuals typica... more ... ACTION Guillermo Fernández1 & David B. Lank2 ... tion. Individuals typically vary considerably in how they exploit food resources, and in their susceptibility to predation and interference competition (Durell 2000, Ydenberg et al. 2002). ...
In the shorebird subfamily Calidridinae, one of the parents shortens parental care and initiates ... more In the shorebird subfamily Calidridinae, one of the parents shortens parental care and initiates southward migration before the other. We estimated the difference in passage date between male and female western sandpipers (Calidris mauri) at their first major stopover on the southward migration from breeding areas in Alaska, in 18 years between 1978 and 2000. Overall, adult females preceded adult males by 1.22 days. A novel finding was that among juveniles, which migrate approximately a month later than adults, females preceded males by similar magnitude (1.14 days). There was wide variation among years, however, and males actually preceded females in years with late hatch. We relate these findings to hypotheses for female-first southward migration in sandpipers.
... ACTION Guillermo Fernández1 & David B. Lank2 ... tion. Individuals typica... more ... ACTION Guillermo Fernández1 & David B. Lank2 ... tion. Individuals typically vary considerably in how they exploit food resources, and in their susceptibility to predation and interference competition (Durell 2000, Ydenberg et al. 2002). ...
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