Metamorphosis of a sesarmid river crab, Armases roberti: stimulation by adult odours versus inhibition by salinity stress


Contact
Klaus.Anger [ at ] awi.de

Abstract

In an experimental laboratory study with the megalopa stage of Armases roberti, a freshwater-inhabiting species of crab from the Caribbean region, we evaluated the combined, potentially antagonistic effects of odours from conspecific adults and of stepwise salinity reductions (simulating upstream migration, reaching within 1 week conditions of 2 or freshwater). Neither of these treatments affected the rate of survival, but the duration of development to metamorphosis was significantly (by about 25%) shortened, when odours from conspecific adult crabs were present, regardless of the salinity conditions. Our results indicate that the metamorphosis-stimulating effect of chemical cues from an adult population of A. roberti is far stronger than the potentially retarding effect of increasing hypoosmotic stress. This suggests that the final phase of larval development, including the processes of settlement and metamorphosis, occurs in this species in freshwater habitats, where conspecific populations live.



Item Type
Article
Authors
Divisions
Programs
Peer revision
ISI/Scopus peer-reviewed
Publication Status
Published
Eprint ID
15939
DOI 10.1080/10236240600986183

Cite as
Anger, K. , Torres, G. and Giménez, L. (2006): Metamorphosis of a sesarmid river crab, Armases roberti: stimulation by adult odours versus inhibition by salinity stress , Marine and Freshwater Behaviour and Physiology, 39 (4), 269 - 278 . doi: 10.1080/10236240600986183


Download
[img]
Preview
PDF (Fulltext)
Ang2006c.pdf

Download (5MB) | Preview
Cite this document as:

Share


Citation

Research Platforms
N/A

Campaigns


Actions
Edit Item Edit Item