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Titolo:
Lateral plate asymmetry, diet and parasitism in threespine stickleback
Autore:
Reimchen, TE; Nosil, P;
Indirizzi:
Univ Victoria, Dept Biol, Victoria, BC V8W 3N5, Canada Univ Victoria Victoria BC Canada V8W 3N5 ol, Victoria, BC V8W 3N5, Canada Simon Fraser Univ, Dept Biol Sci, Burnaby, BC V5A 1S6, Canada Simon FraserUniv Burnaby BC Canada V5A 1S6 , Burnaby, BC V5A 1S6, Canada
Titolo Testata:
JOURNAL OF EVOLUTIONARY BIOLOGY
fascicolo: 4, volume: 14, anno: 2001,
pagine: 632 - 645
SICI:
1010-061X(200107)14:4<632:LPADAP>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
SECONDARY SEXUAL CHARACTERS; GASTEROSTEUS-ACULEATUS-L; INCREASED FLUCTUATING ASYMMETRY; DEVELOPMENTAL STABILITY; DIRECTIONAL ASYMMETRY; 3-SPINED STICKLEBACK; GENETIC-BASIS; DROSOPHILA-MELANOGASTER; FUNCTIONAL IMPLICATIONS; MANDIBULAR CHARACTERS;
Keywords:
bilateral asymmetry; diet; extreme phenotypes; Gasterosteus; immunocompetence; lateral plates; parasitism; stickleback;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
85
Recensione:
Indirizzi per estratti:
Indirizzo: Reimchen, TE Univ Victoria, Dept Biol, POB 3020, Victoria, BC V8W 3N5, Canada Univ Victoria POB 3020 Victoria BC Canada V8W 3N5 3N5, Canada
Citazione:
T.E. Reimchen e P. Nosil, "Lateral plate asymmetry, diet and parasitism in threespine stickleback", J EVOL BIOL, 14(4), 2001, pp. 632-645

Abstract

Individuals with random left-right departures from bilateral symmetry are predicted to exhibit fitness reduction including increased parasitism. In an insular lake population of stickleback (Gasterosteus aculeatus) from the Queen Charlotte Islands, Western Canada, phenotypes with high or low numberof lateral bony plates exhibited increased plate asymmetry relative to modal phenotypes. Asymmetric lateral plate phenotypes had increased prevalenceand to a lesser extent intensity of parasitism relative to symmetric individuals, suggesting that differences in genetic resistance to pathogens contributed to unequal parasitism. The effect occurred mainly in the larger adults and during the warmest season, which may be due to the high Metabolic costs incurred during the summer breeding season. Dietary differences between symmetric and asymmetric phenotypes were also detected and could contribute to unequal infection rates by mediating exposure to infected prey items. Our study, which is one of the first long-term field assessments of asymmetry and parasitism, yields results that are consistent with studies linkingasymmetry to reduced fitness and indicate that lateral plate asymmetry canbe an indicator of poor individual quality, despite its apparent directionality.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 08/08/20 alle ore 00:27:35