Putative Molt-Inhibiting Hormone in Larvae of the Shore Crab Carcinus maenas L.: An Immunocytochemical Approach

Immunocytochemical investigations of the eyestalk of Carcinus maenas zoeal larval stages, using an antiserum directed against putative Carcinus molt-inhibiting hormone (MIH), revealed immunopositive neuronal structures. These structures included perikarya associated with the medulla terminalis X-org...

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Bibliographic Details
Published in:The Biological bulletin (Lancaster) 1991-02, Vol.180 (1), p.65-71
Main Authors: Webster, S. G., Dircksen, H.
Format: Article
Language:English
Subjects:
Axons
Biochemistry. Physiology. Immunology
Biologi
Biological and medical sciences
Biology
Carcinus
Carcinus maenas
Crabs
Crustacea
Crustaceans
Development and Reproduction
Ecdysteroids
Endocrine glands
Fundamental and applied biological sciences. Psychology
Hormones
Immunocytochemistry
Invertebrates
Larvae
Larval development
Marine
Marine biology
Metamorphosis
Metamorphosis (Biology)
Methods
molt-inhibiting hormone
Molting
NATURAL SCIENCES
NATURVETENSKAP
Neurons
neurosecretory
Physiological aspects
Physiology. Development
Prevention
Rectangles
Shellfish
X-organ
Zoea
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Summary:Immunocytochemical investigations of the eyestalk of Carcinus maenas zoeal larval stages, using an antiserum directed against putative Carcinus molt-inhibiting hormone (MIH), revealed immunopositive neuronal structures. These structures included perikarya associated with the medulla terminalis X-organ, parts of the sinus gland tract, and the neurohemal organ-the sinus gland. Apart from an increase in volume of the sinus gland between zoeal stage I and II, no striking changes in the topography or morphology of the MIH neurosecretory system were observed. Immunopositive structures were found in similar locations to those seen in adult crabs. Our results suggest that the control of molting by MIH in crustacean larvae may be similar to the currently accepted model of molt control in adult decapod crustaceans.
ISSN:0006-3185
1939-8697
1939-8697
DOI:10.2307/1542429