Estimation of Carcass Fat and Protein in Northern Pintails (Anas Acuta) During Spring Migration

Dombrowski, P.; Bourgeois, Jean-Claude; Couture, R.; Linard, Christian

doi:10.7589/0090-3558-39.3.620

Cited by 6 publications

(6 citation statements)

References 47 publications

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“…The levels of UR AC were higher than levels reported in other species of anatids (Driver, 1981;Gee et al, 1981;Levengood et al, 2000;Dombrowski et al, 2003), probably because the diet of the wild swans was not rich in animal protein. Polo (1995) attributed the low UR AC concentrations found in Anseriformes to an herbivorous diet, but the swans in our study were not exclusively herbivorous.…”

contrasting

confidence: 65%

Blood Chemistry of Wild Brazilian Coscoroba Swans during Molt

Calabuig

Ferrer

Muriel

2010

Journal of Wildlife Diseases

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The Coscoroba Swan (Coscoroba coscoroba) is an unusual member of the Anatidae found in South America, from the Falkland Islands and Tierra del Fuego through Chile and Argentina, Uruguay, and Paraguay as far north as Mato Grosso do Sul in Brazil. The species is not threatened globally, but some local populations have declined and the status of others is unknown. The objective of this study was to quantify the plasma chemistry of a wild population of Coscoroba Swans in southern Brazil during their molting period. We captured 12 chicks, 14 juveniles, and 31 mature birds. The following blood parameters were measured: glucose, cholesterol, triglycerides, HDL cholesterol, uric acid, creatine-kinase, aspartate amino transferase, alanine-aminotransferase, alkaline phosphatase, amylase, and pancreatic amylase. Significant differences between males and females were not observed for any of the parameters, and only the levels of alkaline phosphatase differed significantly among age groups.

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contrasting

confidence: 65%

Blood Chemistry of Wild Brazilian Coscoroba Swans during Molt

Calabuig

Ferrer

Muriel

2010

Journal of Wildlife Diseases

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“…Data for female Northern Pintails (Anas acuta), however, does not support this conclusion (Dombrowski et al 2003;Schamber et al 2009). Data on variation in fat mass was not reported in the same way in these two studies.…”

Section: Failure Of Condition Indices: Is Lack Of Variation In Mass Tmentioning

confidence: 56%

“…For example, an important difference between the two studies of Northern Pintails mentioned in the previous section is that sample sizes were more than several times larger in the study that detected a much higher and significant correlation than in the study that detected a lower correlation (Dombrowski et al 2003;Schamber et al 2009). Statistical theory indicates that variability of estimates generally decreases as sample size increases.…”

Section: Reliability Of Condition Indices: Are Large Samples Required?mentioning

confidence: 89%

“…Therefore, (1) we obtained data on standard deviation directly from one of the senior authors, J. Schamber (personal communication, 2009), and (2) we calculated the standard deviation for adults and juveniles using the information presented for each group separately and adjusting for differences in the group means for the data in Dombrowski et al (2003). The strength of the correlation between fat mass and body mass varied appreciably between these studies (r 2 = 0.06 and r 2 = 0.52, in Dombrowski et al 2003 andSchamber et al 2009, respectively). Mean fat masses (±standard deviations) were 153.6 g ± 48.2 and 54.1 g ± 41.2, respectively.…”

Section: Failure Of Condition Indices: Is Lack Of Variation In Mass Tmentioning

confidence: 99%

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Morphometric indices of body condition in birds: a review

2011

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Morphometric estimates of body condition are widely used by ornithologists, but which estimates work best is a matter of debate. We review morphometric approaches (body mass, ratio and residual condition indices, predictive regression models, fat scoring, and abdominal profiles) for estimating body condition (defined as fat mass) in birds. We describe the strengths and weaknesses of each approach. Across diverse indices and species (*200 estimates total), the mean r 2 relating condition indices to mass of body fat was 0.55, and 64% of the r 2 values were greater than 0.50. But despite their generally good performance, condition indices sometimes perform poorly (i.e., r 2 is low). The data indicate that: (1) no single index was clearly best, (2) on average body mass alone, fat scores, and predictive multiple regression equations explained slightly more than 50% of the variation in fat content, (3) on average, ratio and residual indices explained slightly less than 50% of the variation in fat content, and (4) body mass alone, a variable that can be easily and reliably measured, is as good or nearly as good an indicator of fat content as any other condition index. We recommend that: (1) morphometric indicators of condition be empirically validated, (2) researchers publish their body composition data in sufficient detail that they can be used in future analyses exploring the relative merits of different condition indices, and (3) multiple regression directly on measured traits be used instead of condition indices whenever the condition index is not empirically validated.

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“…Mean uric acid values obtained in this study for both species of ducks (Table 3) were within the range reported for arriving Northern shoveler and during mid-winter period, 2.8-8.6 mg/dl (Elarabany, 2014), and many anatids, 2-12 mg/dl (Dombrowski, Bourgeois, Couture, & Linard, 2003;Levengood et al, 2000), for species of the Gruiformes order (coots, cranes and rails), 0.9-12.4 mg/dl, and for red-legged partridge (Alectoris rufa), which ranged between 6.8 and 10.6 mg/dl (Rodríguez et al, 2005).…”

Section: Plasma Biochemical Analysismentioning

confidence: 54%

A comparative study of some haematological and biochemical parameters between two species from the Anatidae family within migration season

Elarabany

2018

JoBAZ

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Background: The study of haematological and biochemical parameters is important to evaluate the physiological status in wild birds. In order to carry out ecophysiological or conservation studies, it is important to know the baseline physiological parameters and how these vary with age, sex and life history events. Results: Haematological parameters including red blood corpuscles (RBCs), white blood cells (WBCs), haematocrit, haemoglobin and related RBC indices and plasma and biochemical parameters including glucose, lipid profile and liver function tests, kidney function tests and electrolyte concentration reference values were determined in two long-distance migratory species from the family Anatidae, the northern shoveler (Anas clypeata) and Eurasian teal (Anas crecca), during migration season. Data revealed significant inter-species differences for most blood and biochemical parameters. These differences are likely due to different feeding habit, diet and species-specific migration behaviour rather than phylogenetic reasons or different environmental condition as they winter at the same place (Máñez et al., Conservation Monitoring in Freshwater Habitats, 2010). Conclusion: To our knowledge, this is the first study that performs a comparative blood analysis on northern shoveler and Eurasian teal during their overwintering period in Manzala Lake, Egypt. Due to the lack of haematological studies on both species during migration, the current results represent a contribution to understanding the physiological adaptations that facilitate the use of different habitats in these species and for establishing reference physiological values and for comparison within the same species, or even with other species in different periods with regard to their use in future conservation efforts or other studies.

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Estimation of Carcass Fat and Protein in Northern Pintails (Anas Acuta) During Spring Migration

Cited by 6 publications

References 47 publications

Blood Chemistry of Wild Brazilian Coscoroba Swans during Molt

Blood Chemistry of Wild Brazilian Coscoroba Swans during Molt

Morphometric indices of body condition in birds: a review

A comparative study of some haematological and biochemical parameters between two species from the Anatidae family within migration season

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