Alteration of the chemical environment disrupts communication in a freshwater fish
- 16 February 2006
- journal article
- Published by The Royal Society in Proceedings. Biological sciences
- Vol. 273 (1591), 1187-1193
- https://doi.org/10.1098/rspb.2005.3406
Abstract
It is well established that changes to the chemical environment can impair development, physiology and reproductive biology; by contrast, impacts on communication have not been widely reported. This is surprising given that chemical communication is the most widely used sensory modality in nature, and that variation in the chemical composition of the environment is the rule, not the exception. Here, we show that chemically mediated species recognition in a swordtail fish, Xiphophorus birchmanni, can be hindered by anthropogenic disturbance to the signalling environment. Females have a strong preference for conspecific male chemical cues, yet they hybridize in nature with the congener X. malinche. Wild-caught females showed a strong preference for conspecifics when tested in clean water, but failed to show a preference when tested in stream water subject to sewage effluent and agricultural runoff. We hypothesized that this was due to the interaction between chemical communication systems and humic acid (HA), a ubiquitous, natural product elevated to high levels by anthropogenic processes. When exposed to elevated concentrations of HA, female X. birchmanni again lost their preference for conspecific male chemical cues, while visual mating preferences and motivation to mate were retained. Sub-lethal concentrations of seemingly benign substances can thus have a drastic effect on natural populations through their specific impact on communication systems.This publication has 30 references indexed in Scilit:
- Female Disdain for Swords in a Swordtail FishThe American Naturalist, 2006
- Avoiding a compromise between sexual selection and species recognition: female swordtail fish assess multiple species-specific cuesBehavioral Ecology, 2003
- Protection by Natural Blackwater against Disturbances in Ion Fluxes Caused by Low pH Exposure in Freshwater Stingrays Endemic to the Rio NegroPhysiological and Biochemical Zoology, 2003
- Inhibition of Endogenous Thyroid Hormone Receptor-βand Peroxisome Proliferator-Activated Receptor-αActivities by Humic Acid in a Human-Derived Liver Cell LineThyroid®, 2002
- In goldfish the discriminative ability for odours persists after reduction of the olfactory epithelium, and rapidly returns after olfactory nerve axotomy and crossing bulbsPhilosophical Transactions B, 2000
- Cichlid Fish Diversity Threatened by Eutrophication That Curbs Sexual SelectionScience, 1997
- Humic substances as electron acceptors for microbial respirationNature, 1996
- A further examination of a pre-existing bias favouring a sword in the genusXiphophorusAnimal Behaviour, 1995
- Mechanism of the desmutagenic effect of humic acidMutation research. Reviews in mutation research, 1987
- Xenurobryconin phylogeny and putative pheromone pumps in glandulocaudine fishes (Teleostei, Characidae)Smithsonian Contributions to Zoology, 1985