Hemiptera: Gerridae of Gunnison County, Colorado
IntroductionWater Strider, Pond Skater
Updated Vernal Equinox 2016 (Under Construction :-)
Notice the "sinuous" margin of the inside of the eye.
ReferencesAndersen, NM 1977 Fine structure of the body hair layers and morphology of the spiracles of semiaquatic bugs (Insecta, Hemiptera, Gerromorpha) in relation to life on the water surface. Entomol. Scand. 8 : 301-316.
Andersen,NM 1993 Classification, phylogeny, and zoogeography of the pond skater genus Gerris Fabricius (Hemiptera: Gerridae). Canadian Journal of Zoology 71, 2473-2508.
Gao X, Jiang L 2004 Biophysics: water-repellent legs of water striders. Nature 432 (7013): 36.
Hungerford, H.B. and Matsuda, R. 1960 Keys to subfamilies, tribes, genera and subgenera of the Gerridae of the world. Kans. Univ. Sci. Bull. 41 : 3-23.
Jamieson, G. S., and Scudder, G. G. E. (1979). Predation in Gerris (Hemiptera): reactive distances and locomotion rates. Oecologia, 44(1), 13-20.
Abstract: " Two of the parameters which determine the rate at which prey are encountered by a predator, i.e. the distance at which a predator responds to a prey and its rate of movement relative to the prey's, were determined for all the stages of five species of Gerris using gerrids and Drosophila as prey. These parameters allowed calculation of the swath, or “encounter path”, a gerrid would cover as it moved across the water surface. Gerris species prefer to attack live prey in front of them, and tend to ignore prey if the attack requires a turn of more than 100°. Hunger was found to affect the responsive angle required to clicit an attack by G. remigis, and regardless of species, smaller gerrids required the prey to be closer before an attack was initiated. The rate of movement in Gerris was measured as a function of stride length and the number of strides made per unit time. Stride length varied according to the length of the mesothoracic leg, and the frequency of movement was observed to be species specific. G. remigis, a stream species, moved 4-6 times as often as the four other species studied, all of which are characteristically found on non-moving water surfaces. Within a species, gerrid size had no significant effect on the frequency of movement, although there was a tendency for smaller gerrids to move less. "
Junger,W; Varj£,D 1990 Drift compensation and its sensory basis in waterstriders (Gerris paludum F.). Journal of Comparative Physiology A. Sensory, Neural and Behavioral Physiology 167, 441-446.
Leach WE. 1815. Entomology. Brewster's Edinburgh Encyclopaedia. 9:57-102.
Matsuda, R. 1960 Morphology, evolution and a classification of the Gerridae (Hemiptera-Heteroptera). Univ. Kans. Sci. Bull. 41 : 25-632
Stevens,LE; Polhemus,JT; Durfee,RS and Olson,CA 2007 Large mixed-species dispersal flights of predatory and scavenging aquatic Heteroptera and Coleoptera, northern Arizona, USA. Western North American Naturalist, 67(4), 587-592.
Vepsäläinen, K. 1971 The roles of photoperiodism and genetic switch in alary polymorphism in Gerris. Acta Entomol. Fenn. 28: 101-102
Wilcox,RS; Maier,HA 1991 Facultative estivation in the water strider Gerris remigis. Canadian Journal of Zoology 69, 1412-1413.
Brown,WS 2006 Hemiptera of Gunnison County, Colorado