| shorebird predation of horseshoe crab eggs in delaware bay: species contrasts and availability constraints. | 1. functional responses -- the relationship between resource intake rate and resource abundance -- are widely used in explaining predator-prey interactions yet many studies indicate that resource availability is crucial in dictating intake rates. 2. for time-stressed migrant birds refuelling at passage sites, correct decisions concerning patch use are crucial as they determine fattening rates and an individual's future survival and reproduction. measuring availability alongside abundance is esse ... | 2007 | 17439467 |
| metal levels in shorebird feathers and blood during migration through delaware bay. | we investigated levels of arsenic mercury, lead, cadmium, and chromium in red knot (calidris canutus), semipalmated sandpipers (calidris pusilla), and sanderling (calidris alba) migrating through delaware bay, new jersey to determine if contaminant levels are likely to be causing negative effects on the populations of these shorebirds, to compare among species, and to explore differences among individuals collected early and late during their migration stopover. we analyzed blood and feathers, b ... | 2017 | 28444421 |
| intestinal microbiota and species diversity of campylobacter and helicobacter spp. in migrating shorebirds in delaware bay. | using 16s rrna gene sequencing analysis, we examined the bacterial diversity and the presence of opportunistic bacterial pathogens (i.e., campylobacter and helicobacter) in red knot (calidris canutus; n = 40), ruddy turnstone (arenaria interpres; n = 35), and semipalmated sandpiper (calidris pusilla; n = 22) fecal samples collected during a migratory stopover in delaware bay. additionally, we studied the occurrence of campylobacter spp., enterococci, and waterfowl fecal source markers using quan ... | 2014 | 24413599 |
| metals in tissues of migrant semipalmated sandpipers (calidris pusilla) from delaware bay, new jersey. | there is an abundance of field data on levels of metals for feathers in a variety of birds, but relatively few data for tissues, especially for migrant species from one location. in this paper we examine the levels of arsenic, cadmium, chromium, lead, manganese, mercury and selenium in muscle, liver, brain, fat and breast feathers from migrant semipalmated sandpipers (calidris pusilla) collected from delaware bay, new jersey. our primary objectives were to (1) examine variation as a function of ... | 2014 | 24952461 |