Document Detail


The neuroecology of cartilaginous fishes: sensory strategies for survival.
MedLine Citation:
PMID:  22986825     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
As apex predators, chondrichthyans, or cartilaginous fishes, hold an important position within a range of aquatic ecosystems and influence the balance between species' abundance and biodiversity. Having been in existence for over 400 million years and representing the earliest stages of the evolution of jawed vertebrates, this group also covers a diverse range of eco-morphotypes, occupying both marine and freshwater habitats. The class Chondrichthyes is divided into two subclasses: the Elasmobranchii (sharks, skates, and rays) and the Holocephali (elephant sharks and chimaeras). However, many of their life history traits, such as low fecundity, the production of small numbers of highly precocious young, slow growth rates, and late maturity, make them highly susceptible to human exploitation. To mitigate the negative effects of human impacts, it is important that we understand the sensory strategies that elasmobranchs use for navigating within their environment, forming reproductive aggregations, feeding, and even communicating. One approach to investigate the sensory bases of their behavior is to examine the peripheral sense organs mediating vision, olfaction, gustation, lateral line, electroreception, and audition in a large range of species in order to identify specific adaptations, the range of sensitivity thresholds, and the compromise between sensory spatial resolution and sensitivity. In addition, we can quantitatively assess the convergence of sensory input to the central nervous system and the relative importance of different sensory modalities. Using a comparative approach and often a combination of anatomical, electrophysiological, and molecular techniques, significant variation has been identified in the spatial and chromatic sampling of the photoreceptors in the eye, the surface area and the number of olfactory lamellae within the nasal cavity, the level of gustatory sampling within the oral cavity, the type and innervation of neuromasts of the lateral line system, the distribution of electroreceptive pores over the head, and the morphology of the inner ear. These results are presented in the context of predictions of sensory capabilities for species living in a range of ecological niches, what further research is needed, and how this sensory input may be a predictor of behavior.
Authors:
Shaun P Collin
Related Documents :
3909015 - Control of ovulation, vaginal estrus, and behavioral receptivity in voles (microtus).
22948475 - Auditory nerve frequency tuning measured with forward-masked compound action potentials.
17279995 - Multiple void formation in plasmas containing multispecies charged grains.
20016835 - Rhodopsin molecular evolution in mammals inhabiting low light environments.
20347495 - Dosimetric effect of setup motion and target volume margin reduction in pediatric epend...
23363785 - Involvement of the autonomic nervous system in diurnal variation of corrected qt interv...
Publication Detail:
Type:  Journal Article     Date:  2012-09-13
Journal Detail:
Title:  Brain, behavior and evolution     Volume:  80     ISSN:  1421-9743     ISO Abbreviation:  Brain Behav. Evol.     Publication Date:  2012  
Date Detail:
Created Date:  2012-09-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0151620     Medline TA:  Brain Behav Evol     Country:  Switzerland    
Other Details:
Languages:  eng     Pagination:  80-96     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 S. Karger AG, Basel.
Affiliation:
The Neuroecology Group, School of Animal Biology and the UWA Oceans Institute, The University of Western Australia, Crawley, W.A., Australia.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Microbial Ecology and Association of Bacillus thuringiensis in Chicken Feces Originating from Feed.
Next Document:  Electroreception in elasmobranchs: sawfish as a case study.