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Titolo:
Temperature shock during development fails to increase the fluctuating asymmetry of a sexual trait in stalk-eyed flies
Autore:
Bjorksten, TA; Pomiankowski, A; Fowler, K;
Indirizzi:
Univ London Univ Coll, Dept Biol, London NW1 2HE, England Univ London UnivColl London England NW1 2HE ol, London NW1 2HE, England Colorado State Univ, Dept Biol, Ft Collins, CO 80523 USA Colorado State Univ Ft Collins CO USA 80523 iol, Ft Collins, CO 80523 USA
Titolo Testata:
PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES B-BIOLOGICAL SCIENCES
fascicolo: 1475, volume: 268, anno: 2001,
pagine: 1503 - 1510
SICI:
0962-8452(20010722)268:1475<1503:TSDDFT>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
DROSOPHILA-MELANOGASTER; CONSERVATION BIOLOGY; STRESS; SELECTION; STABILITY; INDICATOR; PATTERNS; FITNESS; QUALITY; SIZE;
Keywords:
fluctuating asymmetry; stalk-eyed flies; environmental stress;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Fowler, K Univ London Univ Coll, Dept Biol, London NW1 2HE, England Univ London Univ Coll London England NW1 2HE NW1 2HE, England
Citazione:
T.A. Bjorksten et al., "Temperature shock during development fails to increase the fluctuating asymmetry of a sexual trait in stalk-eyed flies", P ROY SOC B, 268(1475), 2001, pp. 1503-1510

Abstract

The fluctuating asymmetry (FA) of bilateral traits is claimed to be a general indicator of environmental stress. Exaggerated sexual ornaments are thought to show elevated levels of FA and a greater response to stress than other traits. Previous work with stalk-eyed flies (Cyrtodiopsis dalmanni) hasshown that the FA of the sexual trait (male rye stalks), wing length and wing width were unaffected by a continually applied food stress. Here we tested whether a transient stress (24-h heat shock at 31 degreesC during development affected the FA of these traits. A second experiment tested the combined stresses of transient heat shock at 31 degreesC: with continuous exposure to desiccation. In each experiment, temperature shock reduced the traitsize, confirming that the treatments were stressful. However, stress had Ilo effect on the FA of individual traits, or the FA summed across all traits. Exposure to the combined stresses significantly elevated mortality and reduced trait size compared to the single-stress regime. However, FA did nordiffer significantly between flies front the two experiments. We found no evidence that FA in sexual and non-sexual traits reflects transient stress during the development of C. dalmanni.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/01/21 alle ore 04:47:02