Microanatomy of the digestive system of enteroctopus megalocyathus (Cephalopoda, Octopoda) of the Southwest Atlantic

A detailed description of the microanatomy of the digestive system of Enteroctopus megalocyathus is given, and this revealed some differences between this octopod species and other species of Octopodidae previously described. These differences are mainly related to tissues lining the lumen of digest...

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Detalles Bibliográficos
Autores principales: Garri, R.G., De Cidre, L.L.
Formato: JOUR
Materias:
Cephalopods
Digestive organs
Enteroctopus megalocyathus
Histology
Southwest atlantic
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01229761_v42_n2_p255_Garri
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_01229761_v42_n2_p255_Garri2023-10-03T14:58:03Z Microanatomy of the digestive system of enteroctopus megalocyathus (Cephalopoda, Octopoda) of the Southwest Atlantic Garri, R.G. De Cidre, L.L. Cephalopods Digestive organs Enteroctopus megalocyathus Histology Southwest atlantic A detailed description of the microanatomy of the digestive system of Enteroctopus megalocyathus is given, and this revealed some differences between this octopod species and other species of Octopodidae previously described. These differences are mainly related to tissues lining the lumen of digestive organs. Unlike descriptions in some octopods mucosa, in E. megalocyathus a pseudostratified epithelium is found covering the lumen of oesophagus, crop, stomach, intestine and caecum. Another major finding is that in the posterior salivary glands, two cell types are present in the same tubular adenomere; they do not constitute independent glandular tubules with only one type of glandular cells. The tubules of these glands are lined by two distinct epithelial cells, distributed from the distal to the proximal zones: type A, in the proximal zone of the glandular tubule, with cylindrical cells and globular mucous cells; and type B in the distal zone, cylindrical, with a weakly eosinophilic cytoplasm. The secretion of the cells was detected applying PAS and alcian blue at different pH. In the octopuses maintained without food in the aquarium for two days, histological structure of the epithelium of the caecum, intestine and digestive gland showed histological changes specially related with the mucosa. Taken together, the results allow to set the histological structure of the digestive tract of E. megalocyathus in their natural habitat and to provide preliminary evidence that this system responds rapidly (∼2 days) to food deprivation, and give baseline data for future studies investigating the impact of environmental changes on the gut. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01229761_v42_n2_p255_Garri
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Cephalopods
Digestive organs
Enteroctopus megalocyathus
Histology
Southwest atlantic
spellingShingle Cephalopods
Digestive organs
Enteroctopus megalocyathus
Histology
Southwest atlantic
Garri, R.G.
De Cidre, L.L.
Microanatomy of the digestive system of enteroctopus megalocyathus (Cephalopoda, Octopoda) of the Southwest Atlantic
topic_facet Cephalopods
Digestive organs
Enteroctopus megalocyathus
Histology
Southwest atlantic
description A detailed description of the microanatomy of the digestive system of Enteroctopus megalocyathus is given, and this revealed some differences between this octopod species and other species of Octopodidae previously described. These differences are mainly related to tissues lining the lumen of digestive organs. Unlike descriptions in some octopods mucosa, in E. megalocyathus a pseudostratified epithelium is found covering the lumen of oesophagus, crop, stomach, intestine and caecum. Another major finding is that in the posterior salivary glands, two cell types are present in the same tubular adenomere; they do not constitute independent glandular tubules with only one type of glandular cells. The tubules of these glands are lined by two distinct epithelial cells, distributed from the distal to the proximal zones: type A, in the proximal zone of the glandular tubule, with cylindrical cells and globular mucous cells; and type B in the distal zone, cylindrical, with a weakly eosinophilic cytoplasm. The secretion of the cells was detected applying PAS and alcian blue at different pH. In the octopuses maintained without food in the aquarium for two days, histological structure of the epithelium of the caecum, intestine and digestive gland showed histological changes specially related with the mucosa. Taken together, the results allow to set the histological structure of the digestive tract of E. megalocyathus in their natural habitat and to provide preliminary evidence that this system responds rapidly (∼2 days) to food deprivation, and give baseline data for future studies investigating the impact of environmental changes on the gut.
format JOUR
author Garri, R.G.
De Cidre, L.L.
author_facet Garri, R.G.
De Cidre, L.L.
author_sort Garri, R.G.
title Microanatomy of the digestive system of enteroctopus megalocyathus (Cephalopoda, Octopoda) of the Southwest Atlantic
title_short Microanatomy of the digestive system of enteroctopus megalocyathus (Cephalopoda, Octopoda) of the Southwest Atlantic
title_full Microanatomy of the digestive system of enteroctopus megalocyathus (Cephalopoda, Octopoda) of the Southwest Atlantic
title_fullStr Microanatomy of the digestive system of enteroctopus megalocyathus (Cephalopoda, Octopoda) of the Southwest Atlantic
title_full_unstemmed Microanatomy of the digestive system of enteroctopus megalocyathus (Cephalopoda, Octopoda) of the Southwest Atlantic
title_sort microanatomy of the digestive system of enteroctopus megalocyathus (cephalopoda, octopoda) of the southwest atlantic
url http://hdl.handle.net/20.500.12110/paper_01229761_v42_n2_p255_Garri
work_keys_str_mv AT garrirg microanatomyofthedigestivesystemofenteroctopusmegalocyathuscephalopodaoctopodaofthesouthwestatlantic
AT decidrell microanatomyofthedigestivesystemofenteroctopusmegalocyathuscephalopodaoctopodaofthesouthwestatlantic
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