scholarly journals Assembly of the fluorescent acrosomal matrix and its fate in fertilization in the water strider, Aquarius remigis

2011 ◽  
Vol 226 (4) ◽  
pp. 999-1006 ◽  
Author(s):  
Haruhiko Miyata ◽  
Naoki Noda ◽  
Daphne J. Fairbairn ◽  
Rudolf Oldenbourg ◽  
Richard A. Cardullo
Keyword(s):  
Water Strider ◽  
Aquarius Remigis

Functional morphology of sexually selected gentalia in the water strider Aquarius remigis

2003 ◽  
Vol 81 (3) ◽  
pp. 400-413 ◽  
Author(s):  
Daphne J Fairbairn ◽  
Richard Vermette ◽  
Narinder N Kapoor ◽  
Nayer Zahiri
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Posterior Margin ◽  
Reproductive Tract ◽  
Fertilization Success ◽  
Water Strider ◽  
Female Resistance ◽  
Aquarius Remigis ◽  
Large Spine ◽  
Scanning Electron

In the water strider Aquarius remigis (Say), sexual selection favours males with longer genitalia. We used video analysis plus light and scanning electron microscopy to examine the structure, movement, and articulation of the genitalia as a first step in determining the functional basis of this selection. Male A. remigis are characterized by long, robust genital segments; a marked ventral median notch in the posterior margin of the pregenital segment; an enlarged phallus tipped with a uniquely prolonged sclerotized plate; and a large, spine-covered, membranous lobe that inflates within the female's reproductive tract. Detailed examinations of genital interactions prior to and during copulation allow us to deduce the functional significance of these distinguishing traits. We postulate that by increasing the length, mobility, strength, and rigidity of the phallus, the first three traits increase the ability of males to achieve intromission in spite of active female resistance, and to maintain intromission during the prolonged copulations characteristic of this species. Inflation of the large, spinous lobe probably contributes to the latter function, and may also directly affect fertilization success by displacing or damaging sperm from previous males. We discuss these interpretations in the context of current theories of genitalic coevolution and sexual conflict in the Gerridae.

scholarly journals THE ROLE OF MULTILEVEL SELECTION IN THE EVOLUTION OF SEXUAL CONFLICT IN THE WATER STRIDER AQUARIUS REMIGIS

Evolution ◽  
2010 ◽  
Vol 64 (11) ◽  
pp. 3183-3189 ◽  
Author(s):  
Omar Tonsi Eldakar ◽  
David Sloan Wilson ◽  
Michael J. Dlugos ◽  
John W. Pepper
Keyword(s):  
Sexual Conflict ◽  
Multilevel Selection ◽  
Water Strider ◽  
Aquarius Remigis

Protease activation and the signal transduction pathway regulating motility in sperm from the water strider Aquarius remigis

Cytoskeleton ◽  
2012 ◽  
Vol 69 (4) ◽  
pp. 207-220 ◽  
Author(s):  
Haruhiko Miyata ◽  
Catherine D. Thaler ◽  
Leah T. Haimo ◽  
Richard A. Cardullo
Keyword(s):  
Signal Transduction ◽  
Signal Transduction Pathway ◽  
Transduction Pathway ◽  
Water Strider ◽  
Aquarius Remigis ◽  
Protease Activation
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