AVIS-IBIS

Birds of Indian Subcontinent

ENERGY AND MACRONUTRIENT ASSIMILATION EFFICIENCIES OF SNOWY PLOVER (CHARADRIUS ALEXANDRINUS) FEEDING ON THE POLYCHAETE RAGWORM NEREIS DIVERSICOLOR (Eficiencia en la Asimilación de Energía y Macronutrientes en Charadrius alexandrinus al Alimentarse del P

Publication Type:Journal Article
Year of Publication:2008
Authors:Castro, M, Masero, JA, Megina, C, Amat, JA, Perez-Hurtado, A
Journal:The Auk
Volume:125
Issue:2
Date Published:2008
ISBN Number:00048038
Keywords:Charadriidae, Charadrius, Charadrius alexandrinus, Charadrius nivosus
Abstract:ABSTRACT Macronutrient (protein, lipids, and carbohydrates) assimilation efficiencies of wild birds have rarely been studied, but they may be particularly important for estimating the optimal diet. We assessed experimentally the energy and macronutrient assimilation efficiencies of captive Snowy Plover (Charadrius alexandrinus) feeding on the polychaete ragworm Nereis diversicolor, a major natural prey for migratory shorebirds (Charadrii) along intertidal habitats worldwide. Overall, Snowy Plover consumed 8.64 ± 1.54 (SD) g of dry ragworms per day, and the apparent metabolizable energy was 136.59 ± 27.69 kJ·day−1 (3.5–4.0 times the basal metabolic rate). Assimilation efficiencies were 80.04 ± 2.04%, 93.48 ± 1.08%, 84.75 ± 2.01%, and 89.23 ± 2.61% for energy, proteins, lipids, and carbohydrates, respectively. Macronutrient assimilation efficiencies were similar during early winter and premigration and between male and female Snowy Plover. Relatively high protein assimilation by Snowy Plover may be associated with their specialized high-protein diet.
URL:http://www.jstor.org/stable/10.1525/auk.2008.060144
Short Title:The Auk
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith