Do leucocytes reflect condition in nestling burrowing parrots Cyanoliseus patagonus in the wild?
The different leucocyte types are an important part of the immune system. Thus, they have been used in ecological studies to assess immune function and physiological stress in wild birds. It is generally assumed that increased stress and decreased condition are associated with an increase in the rat...
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paper:paper_10956433_v152_n2_p176_Masello2023-06-08T16:07:01Z Do leucocytes reflect condition in nestling burrowing parrots Cyanoliseus patagonus in the wild? Masello, Juan Francisco Body condition H/L ratio Haematology Immunology Innate immunity Leucocyte counts Patagonian Conure Psittaciformes animal cell animal experiment article body constitution burrowing species controlled study Cyanoliseus patagonus erythrocyte female innate immunity leukocyte lymphocyte male nestling nonhuman parrot physiological stress wild animal Age Factors Animal Nutritional Physiological Phenomena Animals Animals, Wild Argentina Body Constitution Erythrocyte Count Immunity, Innate Leukocyte Count Leukocytes Nesting Behavior Parrots Aves Cyanoliseus patagonus Psittacidae Psittaciformes The different leucocyte types are an important part of the immune system. Thus, they have been used in ecological studies to assess immune function and physiological stress in wild birds. It is generally assumed that increased stress and decreased condition are associated with an increase in the ratio of heterophils to lymphocytes, the H/L ratio. We studied leucocyte profiles in relation to body condition in nestling Burrowing Parrots (Cyanoliseus patagonus) in North-eastern Patagonia, Argentina. As in other wild parrots, heterophils were the most numerous leucocyte type, suggesting strong investment into innate immunity. Leucocyte profiles did not change with the age, while nestlings in better body condition increased the number of heterophils. Because the number of lymphocytes was independent of body condition, as a result we observed a positive correlation between body condition and the H/L ratio. The total number of leucocytes relative to erythrocytes increased in nestlings in better body condition, indicating a larger overall investment into immune function in well-nourished nestlings. The observed heterophilic profiles of nestling Burrowing Parrots together with the positive relationship between H/L ratio and body condition may indicate a favoured investment in a robust innate immunity that reduces the risk of infection taking hold in these long-lived birds. © 2008 Elsevier Inc. All rights reserved. Fil:Masello, J.F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10956433_v152_n2_p176_Masello http://hdl.handle.net/20.500.12110/paper_10956433_v152_n2_p176_Masello |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Body condition H/L ratio Haematology Immunology Innate immunity Leucocyte counts Patagonian Conure Psittaciformes animal cell animal experiment article body constitution burrowing species controlled study Cyanoliseus patagonus erythrocyte female innate immunity leukocyte lymphocyte male nestling nonhuman parrot physiological stress wild animal Age Factors Animal Nutritional Physiological Phenomena Animals Animals, Wild Argentina Body Constitution Erythrocyte Count Immunity, Innate Leukocyte Count Leukocytes Nesting Behavior Parrots Aves Cyanoliseus patagonus Psittacidae Psittaciformes |
| spellingShingle |
Body condition H/L ratio Haematology Immunology Innate immunity Leucocyte counts Patagonian Conure Psittaciformes animal cell animal experiment article body constitution burrowing species controlled study Cyanoliseus patagonus erythrocyte female innate immunity leukocyte lymphocyte male nestling nonhuman parrot physiological stress wild animal Age Factors Animal Nutritional Physiological Phenomena Animals Animals, Wild Argentina Body Constitution Erythrocyte Count Immunity, Innate Leukocyte Count Leukocytes Nesting Behavior Parrots Aves Cyanoliseus patagonus Psittacidae Psittaciformes Masello, Juan Francisco Do leucocytes reflect condition in nestling burrowing parrots Cyanoliseus patagonus in the wild? |
| topic_facet |
Body condition H/L ratio Haematology Immunology Innate immunity Leucocyte counts Patagonian Conure Psittaciformes animal cell animal experiment article body constitution burrowing species controlled study Cyanoliseus patagonus erythrocyte female innate immunity leukocyte lymphocyte male nestling nonhuman parrot physiological stress wild animal Age Factors Animal Nutritional Physiological Phenomena Animals Animals, Wild Argentina Body Constitution Erythrocyte Count Immunity, Innate Leukocyte Count Leukocytes Nesting Behavior Parrots Aves Cyanoliseus patagonus Psittacidae Psittaciformes |
| description |
The different leucocyte types are an important part of the immune system. Thus, they have been used in ecological studies to assess immune function and physiological stress in wild birds. It is generally assumed that increased stress and decreased condition are associated with an increase in the ratio of heterophils to lymphocytes, the H/L ratio. We studied leucocyte profiles in relation to body condition in nestling Burrowing Parrots (Cyanoliseus patagonus) in North-eastern Patagonia, Argentina. As in other wild parrots, heterophils were the most numerous leucocyte type, suggesting strong investment into innate immunity. Leucocyte profiles did not change with the age, while nestlings in better body condition increased the number of heterophils. Because the number of lymphocytes was independent of body condition, as a result we observed a positive correlation between body condition and the H/L ratio. The total number of leucocytes relative to erythrocytes increased in nestlings in better body condition, indicating a larger overall investment into immune function in well-nourished nestlings. The observed heterophilic profiles of nestling Burrowing Parrots together with the positive relationship between H/L ratio and body condition may indicate a favoured investment in a robust innate immunity that reduces the risk of infection taking hold in these long-lived birds. © 2008 Elsevier Inc. All rights reserved. |
| author |
Masello, Juan Francisco |
| author_facet |
Masello, Juan Francisco |
| author_sort |
Masello, Juan Francisco |
| title |
Do leucocytes reflect condition in nestling burrowing parrots Cyanoliseus patagonus in the wild? |
| title_short |
Do leucocytes reflect condition in nestling burrowing parrots Cyanoliseus patagonus in the wild? |
| title_full |
Do leucocytes reflect condition in nestling burrowing parrots Cyanoliseus patagonus in the wild? |
| title_fullStr |
Do leucocytes reflect condition in nestling burrowing parrots Cyanoliseus patagonus in the wild? |
| title_full_unstemmed |
Do leucocytes reflect condition in nestling burrowing parrots Cyanoliseus patagonus in the wild? |
| title_sort |
do leucocytes reflect condition in nestling burrowing parrots cyanoliseus patagonus in the wild? |
| publishDate |
2009 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10956433_v152_n2_p176_Masello http://hdl.handle.net/20.500.12110/paper_10956433_v152_n2_p176_Masello |
| work_keys_str_mv |
AT masellojuanfrancisco doleucocytesreflectconditioninnestlingburrowingparrotscyanoliseuspatagonusinthewild |
| _version_ |
1768541622929195008 |