The uropygial gland of the Southern Caracara (Caracara plancus; Falconidae: Falconinae): histological and histochemical aspects

The uropygial gland of Southern Caracara is composed of two lobes with a conical papilla and 21 tuft feathers. The RGM recorded for this species was 0.057%. The capsule surrounding the gland and the medial septum is composed of dense connective tissue and has elastic and reticular fibres. The epithe...

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Veröffentlicht in:Acta zoologica (Stockholm) 2017-07, Vol.98 (3), p.245-251
Hauptverfasser: Chiale, Maria Cecilia, Montalti, Diego, Flamini, M. Alicia, Barbeito, Claudio G.
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container_title Acta zoologica (Stockholm)
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creator Chiale, Maria Cecilia
Montalti, Diego
Flamini, M. Alicia
Barbeito, Claudio G.
description The uropygial gland of Southern Caracara is composed of two lobes with a conical papilla and 21 tuft feathers. The RGM recorded for this species was 0.057%. The capsule surrounding the gland and the medial septum is composed of dense connective tissue and has elastic and reticular fibres. The epithelium of the adenomers can be divided into different strata: germinative, intermediate, secretory and degenerative stratum. The adenomers can be divided into three zones; from zone III, adenomers lead to secondary chambers that converge into a primary storage chamber. Histochemical techniques showed that the uropygial gland synthesizes different types of mucins and it was also positive to some lectins demonstrating the presence of a variety of glycoconjugates. The RGM in this species is smaller than that found for other Falconidae. These differences may be attributed to a negative allometric relationship. The general histological description is similar to other birds. The histochemistry and lectin histochemistry analysis showed a variety of glycoconjugates as part of the uropygial gland. Uropygial secretions have been proposed to have protective functions against bacteria and fungi. The presence of carbohydrate residues is linked to glycoconjugates with antimicrobial functions in many vertebrates associating our results with this species′ habits.
doi_str_mv 10.1111/azo.12171
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The adenomers can be divided into three zones; from zone III, adenomers lead to secondary chambers that converge into a primary storage chamber. Histochemical techniques showed that the uropygial gland synthesizes different types of mucins and it was also positive to some lectins demonstrating the presence of a variety of glycoconjugates. The RGM in this species is smaller than that found for other Falconidae. These differences may be attributed to a negative allometric relationship. The general histological description is similar to other birds. The histochemistry and lectin histochemistry analysis showed a variety of glycoconjugates as part of the uropygial gland. Uropygial secretions have been proposed to have protective functions against bacteria and fungi. The presence of carbohydrate residues is linked to glycoconjugates with antimicrobial functions in many vertebrates associating our results with this species′ habits.</abstract><cop>Oxford</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1111/azo.12171</doi><tpages>7</tpages></addata></record>
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subjects Allometry
Antiinfectives and antibacterials
Bacteria
Birds
Carbohydrates
Chambers
Connective tissue
Connective tissues
Epithelium
falconidae
Feathers
Fibers
Fungi
Glycoconjugates
Habits
Histochemistry
Histology
Lectins
Lobes
Mucin
Mucins
Residues
Secretions
Septum
Southern Caracara
Storage
Strata
Tissue
Uropygial gland
Vertebrates
title The uropygial gland of the Southern Caracara (Caracara plancus; Falconidae: Falconinae): histological and histochemical aspects
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