Gerris buenoi

Last updated

Gerris buenoi is a species of water strider that belongs to the family Gerridae. It was first identified in 1911 and is native to continental USA and Canada. [1] Individuals of this species are small in size and have modified appendages, allowing them to float and "skate" along the surface of the water. G. buenoi can be found near the shoreline of freshwater ponds and small lakes, where they hunt for terrestrial insects that have fallen into the water.

Contents

Gerris buenoi
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hemiptera
Suborder: Heteroptera
Family: Gerridae
Genus: Gerris
Species:
G. buenoi
Binomial name
Gerris buenoi
Kirkaldy, 1911

Habitat

G. buenoi is an aquatic Hemipteran that often lives in slow moving or still waters across North America. [2] Members of Gerridae have very diverse habitat preferences, ranging from open ocean to small lakes and streams. [3] [4] G. buenoi are adapted to freshwater and are specifically found amongst thick vegetation, such as bullrushes, tall grasses, and lillipads at the shorelines of ponds and lakes. [5] They are considered habitat generalists, but often prefer environments devoid of other water strider species. [6] Members of this species are very abundant during spring and early summer, but tend to show seasonality and numbers decline in the late summer. [2]

Behaviour and physical characteristics

Morphology

G. Buenoi is very similar in morphology to G. incurvatus. Adult individuals are roughly 8-10mm in length. Like most other Gerrids, they are polymorphic, and multiple forms of wings exist to correspond with different seasons and living conditions. [7] [8] Females tend to be larger than males. This species is hemimetabolous and has five nymph stages. The fifth instar of G. buenoi is distinguishable from other members of Gerridae by pale, arrow-shaped markings present on their mesothorax. [9] Water striders have all developed elongated mid-legs (in comparison to their hind and forelegs) as adaptations to life on the surface of water. Their front legs are short and raptorial, making them useful for prey capture.

Locomotion

G. buenoi's extended mid-leg adaptation gives them increased thrust along the surface of the water, and hind-legs act as "rudders" to control movement direction. [10] These extended legs cause Gerrids to disperse their weight across the surface of the water, allowing them to skate around with ease. [8] Tarsi have water repellent hairs that prevent submergence, and mechanoreceptors are present on their limbs which orient them in the direction of stimuli by sensing waves in the water. This allows individuals to easily locate and move toward mates or prey, and escape predators.

Feeding methods

Diet and predators

G. buenoi is a predacious insect that feeds primarily on other insects. It is opportunistic in that it most often feeds on small, struggling prey that has fallen into the water. [11] Feeding consists of locating prey, capturing prey using raptorial front legs, and moving to a safe location before consuming it using piercing/sucking mouthparts. Large prey such as damselflies can be the target of groups of water bugs feeding all at once. Common predators of G. buenoi include fishing spiders, diving beetle larvae, dragonfly naiads, and backswimmers. [12] Some parasites that target this species include red water mites and scelionid wasps. [13]

Cannibalism

While predation from other arthropods is the greatest mortality factor in G. buenoi, predation from other individuals of the same species is common. [12] However, first and second instar individuals are especially prone to intra-cohort cannibalism. [14] During early stages of development, if food shortages occur, nymphs are most likely to resort to cannibalism. If G. buenoi are raised in an environment lacking predators, cannibalism can improve growth and development of certain individuals; which can result in the heaviest possible adults.

Reproduction

G. buenoi generations live for approximately one year. [15] Adults survive winter months and lay eggs in the spring. There are five nymph instars which take roughly two months to reach adulthood. Eggs are typically laid on the underside of aquatic vegetation and other debris found floating in the water. Females control the majority of mating interactions due to their large size. Convenience polyandry is common in G. buenoi and Males are known to frequently harass females if the ratio of males to females is high. [16] In this situation it is adaptive for females to accept as many mating attempts as possible, because a great deal of energy would be used trying to repel males attempting to copulate.

Diving behaviour

Like other water striders, G. buenoi is known to perform underwater basking behaviour. [17] This process occurs when individuals submerge themselves under water in cold months when the temperature of the water is warmer than that of the air. Both sexes perform this behaviour, but it has the most benefits to females in that it increases gonad development time and egg production rate. Increased temperatures have the ability to increase reproductive fecundity.

Sexual selection

Female hunger is the single greatest determinate of mating rate in G. buenoi. [18] In fact, if females go for extended periods of time without food, mating rates decrease by around 50%. Similarly to most other water strider species, large G. buenoi males are preferred by females. In situations where food is limited, small males are at a disadvantage. When poorly fed, females become reluctant to mate due to high energy expenditure, and large males are selected based on their ability to overcome female reluctance.

Antagonistic coevolution has arisen in G. buenoi, as well as other members of Gerris. [19] This is a seemingly maladaptive process and it occurs when males and females struggle to reproduce with one another due to conflicting reproductive patterns. Antagonistic coevolution has the ability to hinder reproductive success of populations of water striders, and is driven by males that have high reproductive rates and females that have low reproductive rates. Post-copulatory processes such as sperm competition and cryptic female choice can also impact reproductive success.

Related Research Articles

<span class="mw-page-title-main">Hemiptera</span> Order of insects often called true bugs

Hemiptera is an order of insects, commonly called true bugs, comprising over 80,000 species within groups such as the cicadas, aphids, planthoppers, leafhoppers, assassin bugs, bed bugs, and shield bugs. They range in size from 1 mm (0.04 in) to around 15 cm (6 in), and share a common arrangement of piercing-sucking mouthparts. The name "true bugs" is often limited to the suborder Heteroptera.

<span class="mw-page-title-main">Gerridae</span> Family of true bugs

The Gerridae are a family of insects in the order Hemiptera, commonly known as water striders, water skeeters, water scooters, water bugs, pond skaters, water skippers, water gliders, water skimmers or puddle flies. Consistent with the classification of the Gerridae as true bugs, gerrids have mouthparts evolved for piercing and sucking, and distinguish themselves by having the unusual ability to walk on water, making them pleuston (surface-living) animals. They are anatomically built to transfer their weight to be able to run on top of the water's surface. As a result, one could likely find water striders present in any pond, river, or lake. Over 1,700 species of gerrids have been described, 10% of them being marine.

<span class="mw-page-title-main">Veliidae</span> Family of true bugs

Veliidae is a family of gregarious predatory insects in the suborder Heteroptera. They are commonly known as riffle bugs, small water striders, or broad-shouldered water striders because the segment immediately behind the head is wider than the rest of the abdomen. The genus Rhagovelia is also referred to as a ripple bug.

<span class="mw-page-title-main">Sexual conflict</span> Term in evolutionary biology

Sexual conflict or sexual antagonism occurs when the two sexes have conflicting optimal fitness strategies concerning reproduction, particularly over the mode and frequency of mating, potentially leading to an evolutionary arms race between males and females. In one example, males may benefit from multiple matings, while multiple matings may harm or endanger females, due to the anatomical differences of that species. Sexual conflict underlies the evolutionary distinction between male and female.

<i>Halobates</i> Genus of true bugs

Halobates or sea skaters are a genus with over 40 species of water striders. Most Halobates species are coastal and typically found in sheltered marine habitats, but five live on the surface of the open ocean and only occur near the coast when storms blow them ashore. These are the only known truly oceanic, offshore insects. They are found in tropical and subtropical marine habitats around the world, with a single species recorded in rivers a few kilometers upstream from the ocean. Halobates are generally very common.

<i>Gerris lacustris</i> Species of true bug

Gerris lacustris, commonly known as the common pond skater or common water strider, is a species of water strider, found across Europe.

<i>Gargaphia solani</i> Species of true bug

Gargaphia solani is a subsocial species of lace bug commonly known as the eggplant lace bug. The species was described by Heidemann in 1914 after it aroused attention a year earlier in the United States as an eggplant pest around Norfolk, Virginia. Fink found that the species became an agricultural pest when eggplant is planted on a large scale.

<span class="mw-page-title-main">Six-spotted fishing spider</span> Species of spider

The six-spotted fishing spider is an arachnid from the nursery web spider family Pisauridae. This species is from the genus Dolomedes, or the fishing spiders. Found in wetland habitats throughout North America, these spiders are usually seen scampering along the surface of ponds and other bodies of water. They are also referred to as dock spiders because they can sometimes be witnessed quickly vanishing through the cracks of boat docks. D. triton gets its scientific name from the Greek mythological god Triton, who is the messenger of the big sea and the son of Poseidon.

<i>Zelus renardii</i> Species of true bug

Zelus renardii, commonly known as the leaf hopper assassin bug, is a predacious insect contained within tribe Harpactorini. Diurnal and found on both wild and crop plants, Z. renardii has spread from its native habitats in western North and Central America into three other biogeographic regions across the globe.

<i>Aquarius remigis</i> Species of true bug

Aquarius remigis, known as the common water strider, is a species of aquatic bug. It was formerly known as Gerris remigis, but the subgenus Aquarius was elevated to generic rank in 1990 on the basis of phylogenetic analysis. Aquarius remigis is found throughout North America, but is most prevalent in the mid-west of the United States.

<i>Aquarius najas</i> Species of true bug

Aquarius najas, also known as the river skater, is a European species of water strider. It was formerly known as Gerris najas, but the subgenus Aquarius was elevated to generic rank in 1990 on the basis of phylogenetic analysis.

<i>Pisaurina mira</i> Species of spider

Pisaurina mira, also known as the American nursery web spider, is a species of spider in the family Pisauridae. They are often mistaken for wolf spiders (Lycosidae) due to their physical resemblance. P. mira is distinguished by its unique eye arrangement of two rows. 

<i>Gerris</i> Genus of true bugs

Gerris is a bug genus in the family Gerridae.

<span class="mw-page-title-main">Polyandry in animals</span> Class of mating system in non-human species

In behavioral ecology, polyandry is a class of mating system where one female mates with several males in a breeding season. Polyandry is often compared to the polygyny system based on the cost and benefits incurred by members of each sex. Polygyny is where one male mates with several females in a breeding season . A common example of polyandrous mating can be found in the field cricket of the invertebrate order Orthoptera. Polyandrous behavior is also prominent in many other insect species, including the red flour beetle and the species of spider Stegodyphus lineatus. Polyandry also occurs in some primates such as marmosets, mammal groups, the marsupial genus' Antechinus and bandicoots, around 1% of all bird species, such as jacanas and dunnocks, insects such as honeybees, and fish such as pipefish.

<i>Aquarius</i> (bug) Genus of true bugs

Aquarius is a genus of water striders found predominantly in the northern hemisphere. Formerly a subgenus, Aquarius was elevated to generic rank in 1990 on the basis of phylogenetic analysis. These are among the world's largest water striders, with females averaging 12–17 mm (0.47–0.67 in) long and males roughly 10–30% smaller, depending on the exact species. An outlier is A. elongatus where both sexes typically are about 24 mm (0.94 in), roughly the same as certain Cylindrostethus, and second only to Gigantometra gigas.

Agelenopsis pennsylvanica, commonly known as the Pennsylvania funnel-web spider or the Pennsylvania grass spider, is a species of spider in the family Agelenidae. The common name comes from the place that it was described, Pennsylvania, and the funnel shape of its web. Its closest relative is Agelenopsis potteri.

<i>Aquarius conformis</i> Species of true bug

Aquarius conformis is a species of water strider in the family Gerridae. It is found in eastern North America from Quebec west to Wisconsin and south to Florida and Mexico.

<i>Hermatobates</i> Genus of true bugs

Hermatobates is a genus of wingless marine bugs placed as the sole genus in the family Hermatobatidae that are sometimes known as coral-treaders. They are quite rare and known only from coral reefs in the Indo-Pacific region. During low tide, they move over the water surface not unlike the more familiar water-striders around coral atolls and reefs and stay submerged in reef crevices during high tide.

<i>Aquarius nebularis</i> Species of true bug

Aquarius nebularis is a species of water strider in the family Gerridae. It is found in the eastern United States from New York south to central Florida and west to Louisiana, Arkansas, and Iowa.

The sensory trap hypothesis describes an evolutionary idea that revolves around mating behavior and female mate choice. It is a model of female preference and male sexual trait evolution through what is known as sensory exploitation. Sensory exploitation, or a sensory trap is an event that occurs in nature where male members of a species perform behaviors or display visual traits that resemble a non-sexual stimulus which females are responsive to. This tricks females into engaging with the males, thus creating more mating opportunities for males. What makes it a sensory trap is that these female responses evolved in a non-sexual context, and the male produced stimulus exploits the female response which would not otherwise occur without the mimicked stimulus.

References

  1. "ITIS - Report: Gerris buenoi". www.itis.gov. Retrieved 2021-12-06.
  2. 1 2 Maynard, K. J. (2011). "Population study of waterstriders (Gerridae: Hemiptera) in Marion Lake, B.C.". University of British Columbia. OCLC   804158419.
  3. Stonedahl, G. M. (1982). "The Gerridae or water striders of Oregon and Washington (Hemiptera:Heteroptera)". Agricultural Experiment Station, Oregon State University. OCLC   1136898487.
  4. Spence, J. R. (1983). "Pattern and Process in Co-Existence of Water-Striders (Heteroptera: Gerridae)". The Journal of Animal Ecology. 52 (2): 497–511. doi:10.2307/4568. ISSN   0021-8790. JSTOR   4568.
  5. Spence, J. R. (1981). "Experimental Analysis of Microhabitat Selection in Water-Striders (Heteroptera: Gerridae)". Ecology. 62 (6): 1505–1514. doi:10.2307/1941507. ISSN   0012-9658. JSTOR   1941507.
  6. Spence, J. R. (1981). "Experimental Analysis of Microhabitat Selection in Water-Striders (Heteroptera: Gerridae)". Ecology. 62 (6): 1505–1514. doi:10.2307/1941507. ISSN   0012-9658. JSTOR   1941507.
  7. Maynard, K. J. (2011). "Population study of waterstriders (Gerridae: Hemiptera) in Marion Lake, B.C.". University of British Columbia. OCLC   804158419.
  8. 1 2 Stonedahl, G. M. (1982). "The Gerridae or water striders of Oregon and Washington (Hemiptera:Heteroptera)". Agricultural Experiment Station, Oregon State University. OCLC   1136898487.
  9. Sprague, I. B. (1967). "Nymphs of the Genus Gerris (Heteroptera: Gerridae) in New England". Annals of the Entomological Society of America. 60 (5): 1038–1044. doi:10.1093/aesa/60.5.1038. ISSN   1938-2901.
  10. Khila, A.; Abouheif, E.; Rowe, L. (2009). "Evolution of a Novel Appendage Ground Plan in Water Striders Is Driven by Changes in the Hox Gene Ultrabithorax". PLOS Genetics. 5 (7): e1000583. doi: 10.1371/journal.pgen.1000583 . ISSN   1553-7404. PMC   2709915 . PMID   19649305.
  11. Rowe, L. (1992). "Convenience polyandry in a water strider: foraging conflicts and female control of copulation frequency and guarding duration". Animal Behaviour. 44: 189–202. doi:10.1016/0003-3472(92)90025-5. ISSN   0003-3472. S2CID   53185546.
  12. 1 2 Spence, J. R. (1986). "Relative impacts of mortality factors in field populations of the waterstrider Gerris buenoi Kirkaldy (Heteroptera: Gerridae)". Oecologia. 70 (1): 68–76. Bibcode:1986Oecol..70...68S. doi:10.1007/bf00377112. ISSN   0029-8549. PMID   28311288. S2CID   13162977.
  13. Maynard, K. J. (2011). "Population study of waterstriders (Gerridae: Hemiptera) in Marion Lake, B.C.". University of British Columbia. OCLC   804158419.
  14. Klingenberg, C. P.; Spence, J. R. (1996). "Impacts of Predation and Intracohort Cannibalism in the Water Strider Gerris buenoi (Heteroptera: Gerridae)". Oikos. 75 (3): 391. doi:10.2307/3545879. ISSN   0030-1299. JSTOR   3545879.
  15. Maynard, K. J. (2011). "Population study of waterstriders (Gerridae: Hemiptera) in Marion Lake, B.C.". University of British Columbia. OCLC   804158419.
  16. Rowe, L. (1992). "Convenience polyandry in a water strider: foraging conflicts and female control of copulation frequency and guarding duration". Animal Behaviour. 44: 189–202. doi:10.1016/0003-3472(92)90025-5. ISSN   0003-3472. S2CID   53185546.
  17. Spence, J. R.; Spence, D. H.; Scudder, G. G. E. (1980). "Submergence Behavior in Gerris: Underwater Basking". American Midland Naturalist. 103 (2): 385. doi:10.2307/2424638. ISSN   0003-0031. JSTOR   2424638.
  18. Ortigosa, A.; Rowe, L. (2002). "The effect of hunger on mating behaviour and sexual selection for male body size in Gerris buenoi". Animal Behaviour. 64 (3): 369–375. doi:10.1006/anbe.2002.3065. ISSN   0003-3472. S2CID   53195309.
  19. Devost, E.; Turgeon, J. (2016). "The combined effects of pre- and post-copulatory processes are masking sexual conflict over mating rate in Gerris buenoi". Journal of Evolutionary Biology. 29 (1): 167–177. doi: 10.1111/jeb.12772 . ISSN   1420-9101. PMID   26468888. S2CID   1020502.