Sexual dimorphism and allometry in the head and body size of two viperid snakes (genus Vipera)

2024
journal article
article
dc.abstract.enSexual dimorphism in the size and shape of the body and head is the result of manifold selective pressures acting on organisms. In snakes, sexual size dimorphism is common and has been well-studied. However, intersexual differences in relative head size and shape have attracted far less attention. Similarly, the allometric properties of head shape and size in snakes are poorly known. Here, we analyse sexual dimorphism in two viperid species: European adder Vipera berus (Linnaeus, 1758) and Steppe viper Vipera renardi (Christoph, 1861). We measured body length, tail length and several head characteristics: head length, head width, head height, pileus length, interorbital distance and internarial distance. Our findings were that males and females of both species did not differ in body length (SVL), but that males tended to have significantly longer tails; there were also significant differences in head characteristics - males tended to have higher heads, and larger internarial and interorbital distances. The head dimensions displayed negative allometry when compared against SVL but when scaled against head length, dimensions like head height and head width exhibited positive allometry. We argue that these differences may be related to sexual selection and that the wider heads may also serve as antipredatory signal.
dc.affiliationWydział Biologii : Instytut Zoologii i Badań Biomedycznych
dc.contributor.authorBorczyk, Bartosz
dc.contributor.authorPuszkiewicz, Przemysław
dc.contributor.authorBury, Stanisław - 175272
dc.date.accessioned2024-05-23T07:56:44Z
dc.date.available2024-05-23T07:56:44Z
dc.date.issued2024
dc.date.openaccess0
dc.description.accesstimew momencie opublikowania
dc.description.additionalBibliogr. s. 40-44
dc.description.physical31-44
dc.description.versionostateczna wersja wydawcy
dc.description.volume154
dc.identifier.doi10.26496/bjz.2024.117
dc.identifier.issn0777-6276
dc.identifier.urihttps://ruj.uj.edu.pl/handle/item/341610
dc.languageeng
dc.language.containereng
dc.rightsUdzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa
dc.rights.licenceCC-BY
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/legalcode.pl
dc.share.typeotwarte czasopismo
dc.subject.enallometry
dc.subject.enhead size
dc.subject.enhead shape
dc.subject.enmorphology
dc.subject.ensexual dimorphism
dc.subtypeArticle
dc.titleSexual dimorphism and allometry in the head and body size of two viperid snakes (genus Vipera)
dc.title.journalBelgian Journal of Zoology
dc.typeJournalArticle
dspace.entity.typePublicationen
dc.abstract.en
Sexual dimorphism in the size and shape of the body and head is the result of manifold selective pressures acting on organisms. In snakes, sexual size dimorphism is common and has been well-studied. However, intersexual differences in relative head size and shape have attracted far less attention. Similarly, the allometric properties of head shape and size in snakes are poorly known. Here, we analyse sexual dimorphism in two viperid species: European adder Vipera berus (Linnaeus, 1758) and Steppe viper Vipera renardi (Christoph, 1861). We measured body length, tail length and several head characteristics: head length, head width, head height, pileus length, interorbital distance and internarial distance. Our findings were that males and females of both species did not differ in body length (SVL), but that males tended to have significantly longer tails; there were also significant differences in head characteristics - males tended to have higher heads, and larger internarial and interorbital distances. The head dimensions displayed negative allometry when compared against SVL but when scaled against head length, dimensions like head height and head width exhibited positive allometry. We argue that these differences may be related to sexual selection and that the wider heads may also serve as antipredatory signal.
dc.affiliation
Wydział Biologii : Instytut Zoologii i Badań Biomedycznych
dc.contributor.author
Borczyk, Bartosz
dc.contributor.author
Puszkiewicz, Przemysław
dc.contributor.author
Bury, Stanisław - 175272
dc.date.accessioned
2024-05-23T07:56:44Z
dc.date.available
2024-05-23T07:56:44Z
dc.date.issued
2024
dc.date.openaccess
0
dc.description.accesstime
w momencie opublikowania
dc.description.additional
Bibliogr. s. 40-44
dc.description.physical
31-44
dc.description.version
ostateczna wersja wydawcy
dc.description.volume
154
dc.identifier.doi
10.26496/bjz.2024.117
dc.identifier.issn
0777-6276
dc.identifier.uri
https://ruj.uj.edu.pl/handle/item/341610
dc.language
eng
dc.language.container
eng
dc.rights
Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa
dc.rights.licence
CC-BY
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/legalcode.pl
dc.share.type
otwarte czasopismo
dc.subject.en
allometry
dc.subject.en
head size
dc.subject.en
head shape
dc.subject.en
morphology
dc.subject.en
sexual dimorphism
dc.subtype
Article
dc.title
Sexual dimorphism and allometry in the head and body size of two viperid snakes (genus Vipera)
dc.title.journal
Belgian Journal of Zoology
dc.type
JournalArticle
dspace.entity.typeen
Publication
Affiliations

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