Castor sacs and anal glands of the north american beaver (Castor canadensis): their histology, development, and relationship to scent communication

@article{Walro2004CastorSA,
  title={Castor sacs and anal glands of the north american beaver (Castor canadensis): their histology, development, and relationship to scent communication},
  author={Jon M. Walro and Gerald E. Svendsen},
  journal={Journal of Chemical Ecology},
  year={2004},
  volume={8},
  pages={809-819}
}
Both sexes of beavers possess a pair of castor sacs and a pair of anal glands located in paired subcutaneous cavities between the pelvis and the base of the tail. The castor sacs are not glandular in the histological sense, hence references to these structures as preputial glands or castor glands are misnomers. The wall of the castor sacs is plicate and comprised of three distinct zones: an outer layer of vascular connective tissue, a two-to five-cell-thick layer of mitotic epithelial cells… 

Seromucous anal gland in a New World hystricognath rodent Thrichomys apereoides (Lund, 1839)

TLDR
The anal gland of nineteen adult individuals was analysed and was characterized as seromucous, secreting neutral glycoprotein and not all individuals studied presented secretion in the glandular ducts, indicating a possible functional variation in the glands.

Do Eurasian Beavers Smear their Pelage with Castoreum and Anal Gland Secretion

  • F. Rosell
  • Environmental Science
    Journal of Chemical Ecology
  • 2004
TLDR
Beavers may release castoreum directly into the water when it meets an intruder, and the “scent mark” in the water can provide an olfactory link between a resident owner and his territory, and Squalene, in contrast to AGS, may be essential for keeping beaver pelts water-repellant.

SEXUAL DIMORPHISM IN THE DEVELOPMENT OF SCENT STRUCTURES FOR THE OBLIGATE MONOGAMOUS EURASIAN BEAVER (CASTOR FIBER)

TLDR
Although the combined weight of the scent structures did not differ between the sexes, males developed significantly larger anal glands but somewhat smaller castor sacs than females, and total investment to scent structures may be limited but allocation is flexible.

Subspecies discrimination in the Scandinavian beaver (Castor fiber): combining behavioral and chemical evidence

TLDR
The findings suggest that geographical isolation has developed discriminatory abilities in C. albicus and further suggest that the proximate factors involved are of environmen- tal origin.

A Field Bioassay of Beaver Castoreum and Some of Its Components

TLDR
Beavers responded to test scents containing castoreum and the neutral and phenol components but not the carboxylic acid and amine components, and the function of odor profiles of beaver and scent mounds are discussed.

Resident beavers (Castor canadensis) do not discriminate between castoreum scent marks from simulated adult and subadult male intruders

TLDR
There was no evidence that territorial beavers responded differentially to castoreum scent marks from intruders of different ages, and there was also no significant correlation between the mass of the scent donor and the response intensity.

Odorant Source Used in Eurasian Beaver Territory Marking

TLDR
It is concluded that castoreum is the main scent signal used in the defense of beaver territories during winter.

Scent-Marking in the Eurasian Beaver (Castor fiber) as a Means of Territory Defense

TLDR
The main results showed that the number of scent marks in territories was significantly higher in spring, when dispersal of subadults normally occurs than during the rest of the year.

Dogs can scent-match individual Eurasian beavers from their anal gland secretion

TLDR
The results suggest that scent-matching dogs may be used as a reliable additional method to DNA analysing of biological samples to improve accuracy of individual beaver detection, and a better alternative than live-trapping/capturing in monitoring of specific beavers in e.g. a reintroduction project.

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Animal tissue techniques , Animal tissue techniques , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی

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