Haematological values of three Antarctic penguins: gentoo (Pygoscelis papua), Adélie (P. adeliae) and chinstrap (P. antarcticus)

Ibáñez, Andrés; Najle, Roberto; Larsen, Karen; Pari, Marcela; Figueroa, Amalia; Montalti, Diego

doi:10.3402/polar.v34.25718

Cited by 9 publications

(4 citation statements)

References 35 publications

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“…While values of both Hb and Hct aligned with previously reported values for gentoo penguins (20.8 ± 5.4 g/dL and 49.2 ± 4.7 % in our study, n = 66, ; 20.7 ± 1.6 g/dL and 50 ± 4 % in Ibañez et al 2015), they were not closely correlated to one another (see Supplements 2-4).…”

Section: Discussionsupporting

confidence: 89%

“…Instead, non-linear models should be used to capture the complex relationship between these variables, though such models require a sufficiently large sample size. While values of both Hb and Hct aligned with previously reported values for gentoo penguins (20.8 ± 5.4 g dl −1 and 49.2 ± 4.7% in our study, n = 66; 20.7 ± 1.6 g dl −1 and 50 ± 4% in Ibañez et al 2015), they were not closely correlated (see Supplements 2−4). Because mature red blood cells have similar amounts of Hb, we expected a correlation between Hct and Hb.…”

Section: Discussionsupporting

confidence: 89%

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Diving efficiency at depth and pre-breeding foraging effort increase with haemoglobin levels in gentoo penguins

McComb‐Turbitt

Crossin

Tierney

et al. 2023

Preprint

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Individual differences in oxygen storage and carrying capacity have been associated with differences in foraging success and fitness-related traits. For air-breathing aquatic animals, such differences can limit diving ability, and thus resource access. As many seabirds deplete their energy reserves during breeding and moulting periods, winter foraging efficiency can influence their breeding behaviour and success. Using gentoo penguins (Pygoscelis papua), we investigate (1) if inter-individual variation in diving efficiency is associated with indices of oxygen storage and carrying capacity (hemoglobin, hematocrit, body mass), and (2) if an individual's pre-breeding foraging effort is associated with these oxygen indices and breeding status. Hemoglobin was positively correlated with diving efficiency, particularly for deeper dives, and only penguins with high hemoglobin levels frequently dove at depth ≥ 140m. However, pre-breeding foraging effort increased with hemoglobin levels, a relationship likely explained by the fact that reaching deep offshore waters requires additional travelling compared to nearshore foraging. The relationship with hematocrit was non-linear, suggesting that commonly-used analyses may not be appropriate for this index. We found that early-laying penguins spent less time at sea prior to nesting than non-breeding penguins. Our study suggests that diving ability, and thus likely access to resources, is linked to aerobic capacity, and that lower foraging effort is associated with early laying. These associations suggest that anthropogenic changes (e.g., an increase in shallow water fisheries) may have differing impacts on individuals. Further understanding these links could help the conservation of diving species.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionsupporting

confidence: 89%

Diving efficiency at depth and pre-breeding foraging effort increase with haemoglobin levels in gentoo penguins

McComb‐Turbitt

Crossin

Tierney

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…In other species with high glucose and Hct (e.g. penguins: Pygoscelis sp., Ibaňez et al ., 2015 ), glucometer readings have been assumed to be usable based on similarities to values seen in prior studies (e.g. Campos Medeiros et al ., 2011 ).…”

Section: Discussionmentioning

confidence: 99%

Obtaining accurate glucose measurements from wild animals under field conditions: comparing a hand held glucometer with a standard laboratory technique in grey seals

Bennett

Turner

Millward

et al. 2017

Conservation Physiology

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“…Staining intensity of each fraction was determined using densitometric analysis (ImageJ software, Schneider et al, 2012) and relativized with a pattern of serum bovine albumin (1 µg/µL) running in each gel. The designation of each band was based on the gap between each other and the comparison of each relative percentage of these fractions with previous reports (Ibañez et al, 2015).…”

Section: Serum Protein Profilementioning

confidence: 99%

Effects of corticosterone administration on the body condition and blood parameters of the house sparrow, Passer domesticus

2023

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Glucocorticoids are steroid hormones produced by the adrenal glands and released into the bloodstream in response to stressful situations. In birds, corticosterone (CORT) is the main glucocorticoid released under stress. Throughout their lives, animals in nature are continually exposed to noxious stimuli known as stressful events. Any alteration of homeostatic stability is a stressful situation and this alteration triggers physiological changes to restore homeostasis. Glucocorticoids are one of the components of the complex set of physiological and behavioral responses to stress. In this work, we use CORT supplied in drinking water to evaluate its effect in blood parameters and physiology in house sparrows (Passer domesticus). To accomplish this, P. domesticus were administered three different doses of CORT in drinking water for 72 h. Body mass, organ mass, pectoral muscle mass, leg muscle mass, and blood parameters (CORT, triglycerides, glucose and uric acid, heterophils/lymphocytes ratio, hematocrit, and serum protein profile) were determined before and after CORT treatment. A 15% decrease in body mass with a significant decrease in pectoral mass were observed after the higher CORT treatment, as well as a decrease in the plasma concentration of uric acid. Lastly, we found a reversal of the heterophils/lymphocytes ratio and a decrease in hematocrit. It was possible to establish first data for baseline and CORT‐alteration values in serum protein profile for P. domesticus. Baseline and altered values of blood parameters and serum protein profile could be an important tool in field ecology because they provide important data to assess the physiological condition in wild birds.

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Haematological values of three Antarctic penguins: gentoo (Pygoscelis papua), Adélie (P. adeliae) and chinstrap (P. antarcticus)

Cited by 9 publications

References 35 publications

Diving efficiency at depth and pre-breeding foraging effort increase with haemoglobin levels in gentoo penguins

Diving efficiency at depth and pre-breeding foraging effort increase with haemoglobin levels in gentoo penguins

Obtaining accurate glucose measurements from wild animals under field conditions: comparing a hand held glucometer with a standard laboratory technique in grey seals

Effects of corticosterone administration on the body condition and blood parameters of the house sparrow, Passer domesticus

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