Oviducal glands throughout the gonad development stages: a case study of Octopus mimus (Cephalopoda)
Date
2017
Type:
Artículo
item.page.extent
13
item.page.accessRights
item.contributor.advisor
ORCID:
Journal Title
Journal ISSN
Volume Title
Publisher
Taylor & Francis Online
item.page.isbn
item.page.issn
item.page.issne
item.page.doiurl
item.page.other
item.page.references
Abstract
The oviducal glands (ODG) play a crucial role in octopus reproduction. Herein, structural changes of
each section of the ODG of Octopus mimus are described histologically throughout the gonad
development stages (GDS). To do this, the epithelial height, stereociliated or non-stereociliated
epithelium, nucleus type (pycnotic or non-pycnotic), epithelial secretions and the value range of the
macroscopic maturity index (MaMI), which directly involves ODG status, were measured. The ODG
are internally constituted of two glandular units (central and peripheral glands) and one set of
receptacles (the spermathecae). High epithelia (40 to 80 μm) were observed in both gland units
during periods with low MaMI values (< 0.1) corresponding to III-mature and IV-pre-spawning. The
stereociliated epithelium was only apparent in II-maturing and III-mature in both gland units. The
nuclei were noticeably pycnotic in the central gland during III-mature, IV-pre-spawning and Vspawning,
but pycnotic in the peripheral gland only during VI-depletion. The epithelium was
disorganised during VI-depletion, while sulphated acid mucin was only present during III-mature in
the central gland. The epithelium transformations during the GDS are related to the functions of the
gland units and to their multiple secretions. The ODG histology complements the GDS and provides
better reproductive status assessment.
Description
item.page.coverage.spatial
item.page.sponsorship
Citation
Olivares, A., Avila-Poveda, O., Leyton, V., Zúñiga, O., Rosas, C., & Northland-Leppe, I. (2017). Glándulas oviducales a lo largo de las etapas de desarrollo de las gónadas: un estudio de caso de Octopus mimus (Cephalopoda). Molluscan Research, 37
Keywords
Central gland, epithelium, female reproductive system, maturity index, octopods, peripheral gland, reproductive status, seminal receptacle, spermatheca, sperm storage