Great Gordian knots:: sex ratio and sexual size dimorphism in aggregations of horsehair worms (Gordias difficilis)

被引:0
|
作者
Cochran, PA [1 ]
Newton, AK [1 ]
Korte, C [1 ]
机构
[1] St Marys Univ, Dept Biol, Winona, MN 55987 USA
关键词
Nematomorpha; Gordiaceae;
D O I
暂无
中图分类号
Q17 [水生生物学];
学科分类号
071004 ;
摘要
Large knots (>100 individuals) of adult horsehair worms (Gordius difficilis) were collected in several spring-fed habitats in Wisconsin and Minnesota. These aggregations were dominated numerically by males. Although distributions of length and diameter of males and females overlapped, females tended to be significantly longer and wider than males. Moreover, at any given length, females were wider than males. These findings confirm and add statistical support to previously published reports.
引用
收藏
页码:78 / 82
页数:5
相关论文
共 40 条
  • [31] Estimation of Adult Sex Ratio and Size-Related Sexual Dimorphism Based on Molecular Sex Determination in the Vulnerable La Selle Thrush, Turdus swalesi
    Exantus, Jean-Marry
    Bezault, Etienne
    Cambrone, Christopher
    Cezilly, Frank
    ANIMALS, 2024, 14 (06):
  • [32] Sexual size dimorphism, sex ratio and the relationship between seasonality and water quality in four species of Gordiida (Nematomorpha) from Catamarca, Argentina
    Salas, L.
    De Villalobos, C.
    Zanca, F.
    JOURNAL OF HELMINTHOLOGY, 2011, 85 (03) : 319 - 324
  • [33] Increased reproductive effort results in male-biased offspring sex ratio: an experimental study in a species with reversed sexual size dimorphism
    Kalmbach, E
    Nager, RG
    Griffiths, R
    Furness, RW
    PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES, 2001, 268 (1481) : 2175 - 2179
  • [34] SEXUAL DIMORPHISM, SEX-RATIO AND SIZE VARIATION IN ADULT CEPHONODES-HYLAS (L) (LEPIDOPTERA, SPHINGIDAE) INFESTING COFFEE IN NIGERIA
    OKELANA, FA
    CAFE CACAO THE, 1987, 31 (02): : 135 - 140
  • [35] Male-biased sexual size dimorphism and sex ratio in the New Zealand Giraffe Weevil, Lasiorhynchus barbicornis (Fabricius, 1775) (Coleoptera: Brentidae)
    Painting, Christina J.
    Buckley, Thomas R.
    Holwell, Gregory I.
    AUSTRAL ENTOMOLOGY, 2014, 53 (03): : 317 - 327
  • [36] Manipulating parental condition affects brood sex ratio, immunocompetence, and early chick mortality in two gull species differing in sexual size dimorphism
    Bukacinski, Dariusz
    Bukacinska, Monika
    Chylarecki, Przemyslaw
    ORNITHOLOGY, 2021, 138 (02)
  • [37] Small-scale variation in sexual size dimorphism and sex ratio in the aquatic moth Acentria ephemerella Denis and Schiffermuller, 1775 (Lepidoptera: Crambidae)
    Miler, Oliver
    Gross, Elisabeth M.
    Straile, Dietmar
    AQUATIC INSECTS, 2014, 36 (3-4) : 187 - 199
  • [38] Sexual dimorphism in external morphology of the American bullfrog Rana (Aquarana) catesbeiana and the possibility of sex determination based on tympanic membrane/eye size ratio
    Asahara, Masakazu
    Obayashi, Yumi
    Suzuki, Ayano
    Kamigaki, Akane
    Ikeda, Takeshi
    JOURNAL OF VETERINARY MEDICAL SCIENCE, 2020, 82 (08): : 1160 - 1164
  • [39] Morphometrics, sex ratio, sexual size dimorphism, biomass, and population size of the Nile crocodile (Crocodylus niloticus) at its southern range limit in KwaZulu-Natal, South Africa
    Jonathan K. Warner
    Xander Combrink
    Peter Calverley
    Garreth Champion
    Colleen T. Downs
    Zoomorphology, 2016, 135 : 511 - 521
  • [40] Morphometrics, sex ratio, sexual size dimorphism, biomass, and population size of the Nile crocodile (Crocodylus niloticus) at its southern range limit in KwaZulu-Natal, South Africa
    Warner, Jonathan K.
    Combrink, Xander
    Calverley, Peter
    Champion, Garreth
    Downs, Colleen T.
    ZOOMORPHOLOGY, 2016, 135 (04) : 511 - 521