Zoo Biol.: Effect of dilution degree of commercial nectar and provision of fruit on food, energy, and nutrient intake in two rainbow lorikeet subspecies.
Article Type: Brief article
Subject: Fruit (Health aspects)
Fruit (Research)
Bioenergetics (Research)
Energy metabolism (Research)
Authors: Kalmar, I.D.
van Loon M.
Burkle M.
Pub Date: 09/01/2009
Publication: Name: Journal of Avian Medicine and Surgery Publisher: Association of Avian Veterinarians Audience: Academic Format: Magazine/Journal Subject: Health Copyright: COPYRIGHT 2009 Association of Avian Veterinarians ISSN: 1082-6742
Issue: Date: Sept, 2009 Source Volume: 23 Source Issue: 3
Topic: Event Code: 310 Science & research
Geographic: Geographic Scope: United States Geographic Code: 1USA United States
Accession Number: 252006997
Full Text: A feeding trial was performed on adult rainbow lorikeets of 2 subspecies: 6 green-naped lorikeets (Trichoglossus haematodus haematodus) and 6 redbreasted lorikeets (Trichoglossus haematodus mitchellii). Throughout the entire trial, half of the birds from each subspecies had ad libitum access to water-diluted commercial nectar powder and drinking water only, whereas the other half also received ad libitum apple pieces. During 3 consecutive 14-day periods, the nectar powder was diluted to a different degree: 1:3 (low), 1:5 (high), and 1:4 (medium) (vol/vol). Diluting nectar to a higher degree resulted, in both subspecies, in a decrease in voluntary energy intake. Next, nectar intake significantly decreased when apple was available and apple intake significantly increased when fed higherdiluted nectar. In green-naped lorikeets fed nectar and apple, energy intake was similar between dilution degrees of nectar but was lower compared with feeding only low- or medium-diluted nectar. Whereas, in redbreasted lorikeets, provision of apple next to mediumor high-diluted nectar resulted in higher voluntary energy intake compared with feeding solely nectar of any degree. Overall, protein and thiamine intake as well as Ca:P ratio of the ingested ration were lowest when fed highly diluted nectar and apple. Yet, minimal requirements were still covered. Because energy content of fruit can be higher than liquid diets, in this case medium- or high-diluted nectar, ad libitum provision of fruit as a means to lower voluntary energy intake in lorikeets, for instance in case of obesity, needs to be considered with care.

et al. 2009;28:98-106.
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