1
40
1
-
Text
A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text.
URL Address
<a href="http://doi.org/10.7717/peerj.897" target="_blank" rel="noreferrer noopener">http://doi.org/10.7717/peerj.897</a>
Pages
e897–e897
Volume
3
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Organization and distribution of glomeruli in the bowhead whale olfactory bulb.
Publisher
An entity responsible for making the resource available
PeerJ
Date
A point or period of time associated with an event in the lifecycle of the resource
2015
1905-7
Subject
The topic of the resource
Cetacea; Baleen whale; Brain; Mysticeti; Olfactory marker protein; Olfactory receptor
Creator
An entity primarily responsible for making the resource
Kishida Takushi; Thewissen J G M; Usip Sharon; Suydam Robert S; George John C
Description
An account of the resource
Although modern baleen whales (Mysticeti) retain a functional olfactory system that includes olfactory bulbs, cranial nerve I and olfactory receptor genes, their olfactory capabilities have been reduced to a great degree. This reduction likely occurred as a selective response to their fully aquatic lifestyle. The glomeruli that occur in the olfactory bulb can be divided into two non-overlapping domains, a dorsal domain and a ventral domain. Recent molecular studies revealed that all modern whales have lost olfactory receptor genes and marker genes that are specific to the dorsal domain. Here we show that olfactory bulbs of bowhead whales (Balaena mysticetus) lack glomeruli on the dorsal side, consistent with the molecular data. In addition, we estimate that there are more than 4,000 glomeruli elsewhere in the bowhead whale olfactory bulb, which is surprising given that bowhead whales possess only 80 intact olfactory receptor genes. Olfactory sensory neurons that express the same olfactory receptors in rodents generally project to two specific glomeruli in an olfactory bulb, implying an approximate 1:2 ratio of the number of olfactory receptors to the number of glomeruli. Here we show that this ratio does not apply to bowhead whales, reiterating the conceptual limits of using rodents as model organisms for understanding the initial coding of odor information among mammals.
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.7717/peerj.897" target="_blank" rel="noreferrer noopener">10.7717/peerj.897</a>
Rights
Information about rights held in and over the resource
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
2015
Baleen whale
Brain
Cetacea
Department of Anatomy & Neurobiology
George John C
Kishida Takushi
Mysticeti
NEOMED College of Medicine
Olfactory marker protein
Olfactory receptor
PeerJ
Suydam Robert S
Thewissen J G M
Usip Sharon