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Functional anatomy of the midgut gland of Gammarus locusta (Crustacea: Amphipoda)

Published online by Cambridge University Press:  30 September 2002

A.D. Correia ,
A.L. Pereira ,
M.H. Costa  and
F. Carrapiço
A.D. Correia
Affiliation:
IMAR, Center for Ecological Modelling, Department of Environmental Sciences and Engineering, College of Sciences and Technology, Lisbon New University, Quinta da Torre 2829-516, Caparica, Portugal
A.L. Pereira
Affiliation:
Centre for Environmental Biology, Department of Plant Biology, FCUL, Campo Grande, Bloco C2, 1749-016 Lisboa, Portugal
M.H. Costa
Affiliation:
IMAR, Center for Ecological Modelling, Department of Environmental Sciences and Engineering, College of Sciences and Technology, Lisbon New University, Quinta da Torre 2829-516, Caparica, Portugal
F. Carrapiço
Affiliation:
Centre for Environmental Biology, Department of Plant Biology, FCUL, Campo Grande, Bloco C2, 1749-016 Lisboa, Portugal
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Abstract

A description of the midgut gland of Gammarus locusta with the aim of using this organ as a complementary tool in ecotoxicological studies was made. The hepatopancreas is composed of two pairs of blind-ending tubular structures. The thickness and length of these tubules were ∼50 μm and 5 mm, respectively, in adult males (10–12 mm length). The distal part of each tubule is characterized by non-vacuolated E-cells typically exhibiting a relatively high nuclear to cytoplasmatic ratio. The epithelium of the remaining tubules is characterized by abundant columnar R- and F-cells, both ∼40 μm long. Large vacuolated B-cells (∼60 μm length) were very common along the midgut gland but seemed to increase in number in the proximal region of each tubule. An SEM examination revealed a delicate network of muscle fibres that limits the organ.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 82 , Issue 2 , April 2002 , pp. 201 - 204
Copyright
2002 Marine Biological Association of the United Kingdom

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