Weapon allometry varies with latitude in the New Zealand giraffe weevil.
J Evol Biol
; 27(12): 2864-70, 2014 12.
Article
em En
| MEDLINE
| ID: mdl-25303121
ABSTRACT
Animal body size commonly shows a relationship with latitude to the degree that this phenomenon is one of the few 'rules' discussed in evolutionary ecology Bergmann's rule. Although exaggerated secondary sexual traits frequently exhibit interesting relationships with body size (allometries) and are expected to evolve rapidly in response to environmental variation, the way in which allometry might interact with latitude has not been addressed. We present data showing latitudinal variation in body size and weapon allometry for the New Zealand giraffe weevil (Lasiorhynchus barbicornis). Males display an extremely elongated rostrum used as a weapon during fights for access to females. Consistent with Bergmann's rule, mean body size increased with latitude. More interestingly, weapon allometry also varied with latitude, such that lower latitude populations exhibited steeper allometric slopes between weapon and body size. To our knowledge, this is the first study to document a latitudinal cline in weapon allometry and is therefore a novel contribution to the collective work on Bergmann's rule and secondary sexual trait variation.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Caracteres Sexuais
/
Gorgulhos
/
Tamanho Corporal
/
Preferência de Acasalamento Animal
/
Modelos Biológicos
Tipo de estudo:
Diagnostic_studies
/
Prognostic_studies
Limite:
Animals
País/Região como assunto:
Oceania
Idioma:
En
Revista:
J Evol Biol
Assunto da revista:
BIOLOGIA
Ano de publicação:
2014
Tipo de documento:
Article
País de afiliação:
Nova Zelândia