Circadian rhythms of determined blood chemistry values in buzzards and eagle owls

García-Rodríguez, Tomás; Ferrer, Miguel; Recio, F.; Castroviejo, Javier

doi:10.1016/0300-9629(87)90680-3

Cited by 93 publications

(46 citation statements)

References 25 publications

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“…Urea concentration has frequently been used as an accurate indicator of nutritional state in bird species with poor fat reserves, such as birds of prey (García-Rodríguez et al 1987a). During starvation periods, tissue proteins are actively mobilized as an energy source, leading to an increase in the nitrogenous excretion components in blood derived from protein catabolism.…”

Section: Discussionmentioning

confidence: 99%

“…During starvation periods, tissue proteins are actively mobilized as an energy source, leading to an increase in the nitrogenous excretion components in blood derived from protein catabolism. Hence, plasma urea values tend to increase when the bird is undernourished and recover after feeding (García-Rodríguez et al 1987a;Alonso-Á lvarez and Ferrer 2001). We ran a GLMM with ''urea'' as the response variable, using a normal distribution of residuals and an identity link.…”

Section: Discussionmentioning

confidence: 99%

“…Blood samples were drawn between 10:00 and 16:00 h to minimize daily variations in biochemical parameters (García-Rodríguez et al 1987a;Ferrer 1993). Measurements can be considered postprandial, since Osprey nestlings are fed actively during the early morning, with the fish supply provided by adults to the nest peaking at 05:00-09:00 h (Stinson 1978, Poole 1989, and sunrise occurred during the sampling period at around 04:45 h at the study area.…”

Section: Plasma Parameters and Sex Determinationmentioning

confidence: 99%

“…However, most of these studies have dealt with domestic or captive animals; few of them provided chemistry values for wild species. In the last 20 years, studies have also focused on the influence that factors such as gender, age, circadian and seasonal rhythms, reproductive stage, diet, body condition, genetics, fasting, stress, pathological disorders, and captivity have on physiological condition (e.g., García-Rodríguez et al 1987a;Dobado-Berrios et al 1998;Tilgar et al 2004;Alonso-Á lvarez 2005;Jerzak et al 2010). However, despite the fact that the availability of biochemical indicators is increasing, there is still a lack of integration of this information as normal explicative cofactors into comprehensive analyses of biological and ecological patterns, and very few studies have applied this integrative approximation of blood chemistry, despite its utility (e.g., natal dispersal and regulation of postfledging period ;Ferrer 1992a, b).…”

Section: Introductionmentioning

confidence: 99%

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Factors affecting plasma biochemistry parameters and physical condition of Osprey (Pandion haliaetus) nestlings

Muriel

Schmidt²,

Calabuig

et al. 2013

J Ornithol

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We assessed the normal values for 15 blood plasma biochemistry parameters and three indices of body condition (IBCs) in free-living Osprey (Pandion haliaetus) nestlings in Brandenburg (Germany). Values were compared with those of other raptors, and possible sexual and age-related differences were examined. In addition, we looked for possible relationships of habitat quality (measured in terms of foraging conditions and human disturbances) to nestling nutritional condition and productivity. Female nestlings showed higher mean urea levels and lower glucose values than males, which could be related to higher growth rates and nutrient demand of females at the end of the nestling period. Seven parameters also showed variation with age, probably relating to increasing body mass, metabolic rates, and physical activity during the pre-fledging stage. Conversely, the IBCs showed poor correlations with selected nutritional parameters, probably due to the homogeneously acceptable nutritional conditions of the nestlings. Finally, we found that Ospreys did not seem to adjust initial parental investment in relation to habitat quality, since productivity was not affected by habitat indicators. However, in large broods, but not in small ones, nestling nutritional condition improved as foraging conditions improved. These results suggest that females that are in better physical condition seem to produce more and better nourished nestlings in better foraging conditions. Wir beurteilten Normalwerte für 15 biochemische Blutplasma-Parameter und drei Indizes für die Körperkondition (Indices of Body Condition-IBCs) bei freilebenden nestjungen Fischadlern (Pandion haliaetus) in Brandenburg (Deutschland). Die Werte wurden mit denen anderer Greifvogelarten verglichen und mögliche geschlechts-und altersabhängige Unterschiede wurden untersucht. Zusätz-lich haben wir denkbare Zusammenhänge zwischen der Habitatqualität-gemessen anhand der Lage von Gebieten der Nahrungssuche und anhand menschlicher Störung-und dem Ernährungszustand der Nestlinge sowie der Reproduktion untersucht. Weibliche Nestlinge zeigten höhere Harnstoff-Durchschnittswerte und geringere GlukoseWerte als männliche, was mit einer höheren Wachstumsrate und einem höheren Nährstoffbedarf bei den jungen Weibchen gegen Ende der Nestlingsperiode zusammenhängen kann. Sieben Parameter zeigten Veränderungen abhängig vom Alter, wahrscheinlich im Zusammenhang mit der zunehmenden Körpermasse, mit dem höheren Metabolismus und mit der steigenden körperlichen Aktivität während der

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Plasma Parameters and Sex Determinationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Factors affecting plasma biochemistry parameters and physical condition of Osprey (Pandion haliaetus) nestlings

Muriel

Schmidt²,

Calabuig

et al. 2013

J Ornithol

Self Cite

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“…Blood samples were collected in the morning, between 5:30 and 9:30 AM to minimize possible diurnal variation in enzyme activities (Garcia-Rodriguez et al, 1987;Thompson et al, 1988). Blood samples (0.5-1 ml) were obtained from the jugular vein and occasionally from a brachial vein, using sterile 1-ml polypropylene syringes equipped with 26-gauge/12-mm or 27-gauge/20-mm needles.…”

Section: Blood Samplingmentioning

confidence: 99%

Plasma B-Esterase Activities in European Raptors

Roy

Grolleau

Chamoulaud

et al. 2005

Journal of Wildlife Diseases

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B-esterases are serine hydrolases composed of cholinesterases, including acetylcholinesterase (AChE) and butyrylcholinesterase (BChE), and carboxylesterase (CbE). These esterases, found in blood plasma, are inhibited by organophosphorus (OP) and carbamate (CB) insecticides and can be used as nondestructive biomarkers of exposure to anticholinesterase insecticides. Furthermore, B-esterases are involved in detoxification of these insecticides. In order to establish the level of these enzymes and to have reference values for their normal activities, total plasma cholinesterase (ChE), AChE and BChE activities, and plasma CbE activity were determined in 729 European raptors representing 20 species, four families, and two orders. The diurnal families of the Falconiforme order were represented by Accipitridae and Falconidae and the nocturnal families of the Strigiforme order by Tytonidae and Strigidae. Intraspecies differences in cholinesterase activities according to sex and/or age were investigated in buzzards (Buteo buteo), sparrowhawks (Accipiter nisus), kestrels (Falco tinnunculus), barn owls (Tyto alba), and tawny owls (Strix aluco). Sex-related differences affecting ChE and AChE activities were observed in young kestrels (2-3-mo-old) and age-related differences in kestrels (ChE and AChE), sparrowhawks (AChE), and tawny owls (ChE, AChE, and BChE). The interspecies analysis yielded a negative correlation between ChE activity and body mass taking into account the relative contribution of AChE and BChE to ChE activity, with the exception of the honey buzzard (Pernis apivorus). The lowest ChE activities were found in the two largest species, Bonelli's eagle (Hieraaëtus fasciatus) and Egyptian vulture (Neophron percnopterus) belonging to the Accipitridae family. The highest ChE activities were found in the relatively small species belonging to the Tytonidae and Strigidae families and in honey buzzard of the Accipitridae family. Species of the Accipitridae, Tytonidae, and Strigidae families were characterized by a BChE contribution that dominated the total ChE activity, while in the species of the Falconidae family, AChE activity dominated. With the exception of the barn owl, CbE activity (eserine-insensitive ␣-naphthyl acetate esterase [␣-⌵〈⌭] activity) in all species was almost absent or very low. The values obtained in this study for ChE, AChE, and BChE activities and the AChE:BChE ratios for buzzard, kestrel, barn owl, and tawny owl provide a good estimate of the normal values in free-living individuals of these European species. They can be used as a baseline to evaluate the effect of anticholinesterase insecticides in the field.

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Raptors

Jones¹,

Chitty²

2020

Exotic Animal Laboratory Diagnosis

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Circadian rhythms of determined blood chemistry values in buzzards and eagle owls

Cited by 93 publications

References 25 publications

Factors affecting plasma biochemistry parameters and physical condition of Osprey (Pandion haliaetus) nestlings

Factors affecting plasma biochemistry parameters and physical condition of Osprey (Pandion haliaetus) nestlings

Plasma B-Esterase Activities in European Raptors

Raptors

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