NDLI: Shape differentiation and characterization in the two morphotypes of the Antarctic limpet Nacella concinna using Elliptic Fourier analysis of shells

Content Provider	Springer Nature Link
Author	Aranzamendi, María Carla Martínez, Juan José Sahade, Ricardo
Copyright Year	2010
Abstract	The Antarctic limpet Nacella concinna (Strebel 1908) presents two ecotypes (littoral and sublittoral) differing in morphological and behavioral characteristics and more recently discovered, in physiological traits and genetic population structure. Previous works, based on traditional morphometry, used only three measurements (length, width and height of the shell) and their relationships. However, this methodology could not describe in detail the shape of the morphotypes. In the present work, Elliptic Fourier analysis (EFA) of shells was used to study the shape of the two morphotypes in six localities along the Antarctic Peninsula. The use of EFA confirmed the morphometric differences. The littoral morphotype has higher and globose shells with the apex displaced to the anterior part; the sublittoral individuals are more flat and pointed, and have the apex very well defined. Low allometric effect was detected in SL individuals, whereas L specimens did not show an allometric relationship within the examined size range. Differences in shell shape among localities were recorded. EFA analysis reflected the overall shell shape and allowed to characterize the main differences in shell shape between ecotypes that were difficult to quantify using the standard morphometric approach.
Starting Page	1163
Ending Page	1170
Page Count	8
File Format	PDF
ISSN	07224060
Journal	Polar Biology
Volume Number	33
Issue Number	9
e-ISSN	14322056
Language	English
Publisher	Springer-Verlag
Publisher Date	2010-05-22
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nacella concinna Morphotypes Shell shape Multivariate analysis Elliptic Fourier analysis Zoology Ecology Plant Sciences Microbiology Oceanography
Content Type	Text
Resource Type	Article
Subject	Agricultural and Biological Sciences

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