Gryllus rubens

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Gryllus rubens
Southeastern field cricket.JPG
Gryllus rubens in Alabama
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Orthoptera
Suborder: Ensifera
Family: Gryllidae
Genus: Gryllus
Species:
G. rubens
Binomial name
Gryllus rubens
(Scudder, 1902)

Gryllus rubens, commonly known as the southeastern field cricket, is one of many cricket species known as a field cricket. [1] [2] It occurs throughout most of the Southeastern United States. Its northern range spans from southern Delaware to the extreme southeastern corner of Kansas, with a southern range stretching from Florida to eastern Texas. [3]

Contents

Description

Morphology

Gryllus rubens has been found to be morphologically indistinguishable from G. texensis , with which it shares its range. Compared to G. texensis, female G. rubens are found to have longer ovipositors. [4] It has been found that G. rubens has a peripatric origin derived from one lineage of geographically subdivided ancestor of G. texensis. [5]

Wing morphology

Many studies on G. rubens revolve around their ability to exhibit wing polymorphism. Many of which are done in northern Florida where G. rubens occurs year-round. In the spring/summer seasons, G. rubens is often found to have long wings that reach the end of their abdomen. [6] While in the autumn/winter seasons G. rubens tend to be short winged. These results showed that the environment plays big role in determining wing morph in G. rubens. However, a later study identified that in female G. rubens, genotype plays a bigger role in determining wing morph and in males the environment plays a bigger role in determining wing morph. [7] Thus it was concluded that genes for wing morph is strongly influenced by the environment. A few years later, a study found that short winged female G. rubens oviposit earlier and with more eggs than their long winged counterparts. [8] It is suggested that due to the longer wings, more nutrients are being allocated to maintain the wings. Which causes long wing morphs to have smaller ovaries and produce fewer eggs. Alternatively, short winged male G. rubens have not been found to reach sexual maturity earlier nor have a difference in reproductive output compared to long winged males. [9]

Digestion

Gryllus rubens have three major digestive enzymes: protease, amylase and lipase in their midgut and hindgut. Previously, it was believed that only midgut had the biggest contribution to breaking down food but it was discovered that the hindgut contributes just much enzymatic activity as the midgut to break down food to nutrients. [10]

Courtship songs

One of the main difference between the cryptic sister species G. rubens and G. texensisis the structure of their call courtship song. [11] Specifically, G. rubens have more low-frequency ticks per phrase and more pulses per trill in their courtship songs. [12]

A study in 2006 investigated female G. rubens response to conspecific courtship songs from males dependent on season. The results showed that fewer females would approach the broadcaster during the autumn, and females would spend less time near the broadcasting male during the fall. [13]

Another study in 2011 investigated male G. rubens responses upon hearing another male make conspecific advertisement signals. It was found that younger G. rubens responded phono-tactically, while older crickets will respond acoustically. [14] In simple terms, upon hearing the conspecific song, young crickets will move towards and approach the courtship song, possibly in attempts to steal wondering females; while older G. rubens will respond with a song of their own.

G. rubens also has occurred alongside G. firmus in portions of its range and can be difficult to differentiate. They can be distinguished by their call song and forewing color pattern. G. rubens has a slower call song than G. firmus. Its forewings also have a pale lateral field with inconspicuous veins and crossveins. G. firmus has venation that is paler than the background of the lateral field. [15]

Predators

The tachinid fly Ormia ochracea is a parasitoid of several crickets including G. rubens. [16] This fly uses the courtship songs of G. rubens in order to locate potential hosts, as O. ochracea have been shown to be attracted to the songs of crickets. [17] After locating the host cricket, O. ochracea females deposit larvae, which then quickly burrow into the host. The larvae develop within the host before emerging in about 7 days, killing the host. [18]

Related Research Articles

<span class="mw-page-title-main">Mole cricket</span> Members of the insect family Gryllotalpidae

Mole crickets are members of the insect family Gryllotalpidae, in the order Orthoptera. Mole crickets are cylindrical-bodied, fossorial insects about 3–5 cm (1.2–2.0 in) long as adults, with small eyes and shovel-like fore limbs highly developed for burrowing. They are present in many parts of the world and where they have arrived in new regions, may become agricultural pests.

<span class="mw-page-title-main">Gryllinae</span> Subfamily of crickets

Gryllinae, or field crickets, are a subfamily of insects in the order Orthoptera and the family Gryllidae.

Dr. William H. "Bill" Cade is a biologist and a former president of the University of Lethbridge. He researches the role of acoustic signals in field cricket mating behaviour.

<i>Ormia ochracea</i> Species of fly

Ormia ochracea is a small yellow nocturnal fly in the family Tachinidae. It is notable for its parasitism of crickets and its exceptionally acute directional hearing. The female is attracted to the song of the male cricket and deposits larvae on or around him, as was discovered in 1975 by the zoologist William H. Cade.

<i>Gryllus bimaculatus</i> Species of cricket

Gryllus bimaculatus is a species of cricket in the subfamily Gryllinae. Most commonly known as the two-spotted cricket, it has also been called the "African" or "Mediterranean field cricket", although its recorded distribution also includes much of Asia, including China and Indochina through to Borneo. It can be discriminated from other Gryllus species by the two dot-like marks on the base of its wings.

<i>Teleogryllus oceanicus</i> Species of cricket

Teleogryllus oceanicus, commonly known as the Australian, Pacific or oceanic field cricket, is a cricket found across Oceania and in coastal Australia from Carnarvon in Western Australia and Rockhampton in north-east Queensland

<i>Gryllus pennsylvanicus</i> Species of cricket

Gryllus pennsylvanicus is known as the fall field cricket. G. pennsylvanicus is common in southern Ontario, is widespread across much of North America and can be found even into parts of northern Mexico. It tends to be absent in most of the southwestern United States including southern California. Within its geographic range this field cricket will burrow into soil in fields and forest edges. Individuals inhabit grassy disturbed areas and are often found around areas of human habitation.

<i>Gryllus veletis</i> Species of cricket

Gryllus veletis, commonly known as the spring field cricket, is abundant throughout eastern North America. G. veletis is a solitary, aggressive, omnivorous, burrow-inhabiting species of cricket. This species is commonly confused with Gryllus pennsylvanicus, as they inhabit the same geographical area. However, the two species are easily distinguished through examination of life history, ovipositor and behavioural differences. Predators of G. veletis include American toads, wild turkeys, red-tailed hawks, wolf spiders and red-backed salamanders.

<span class="mw-page-title-main">Cricket (insect)</span> Small insects of the family Gryllidae

Crickets are orthopteran insects which are related to bush crickets, and, more distantly, to grasshoppers. In older literature, such as Imms, "crickets" were placed at the family level, but contemporary authorities including Otte now place them in the superfamily Grylloidea. The word has been used in combination to describe more distantly related taxa in the suborder Ensifera, such as king crickets and mole crickets.

<i>Gryllus</i> Genus of crickets

Gryllus is a genus of field cricket. Members of the genus are typically 15–31 mm long and darkly coloured. The type species is Gryllus campestris L.: the European field cricket.

Platygryllus is a genus of crickets in the subfamily Gryllinae. Records of species distribution include Africa, southern Europe and in Asia: India, Java and the Philippines.

Gryllus texensis is a species of cricket described by William H. Cade and Otte in (2000). Cade and Otte clarify that field crickets collected in the Southeastern United States from Florida to Texas identified as Gryllus integer, were in fact misidentified, and should have been classified as G. texensis. Morphologically, Cade and Otte found no differences between G. texensis and Gryllus rubens, however, their call song structure was significantly different.

Miogryllus convolutus is a species of cricket from South America.

<i>Oecanthus fultoni</i> Species of cricket

Oecanthus fultoni, also known as the snowy tree cricket, or thermometer cricket, is a species of tree cricket from North America. It feeds on leaves but also damages fruit. The chirp of this species is often dubbed onto sound tracks of films and television shows to depict a quiet summer's night. The rate of chirp varies depending on the heat of the environment, allowing a listener to estimate the temperature.

Gryllus integer, commonly known as the western trilling cricket, is one of many species of field cricket in the genus Gryllus. It is called the "triller" field cricket because its song is nearly continuous rather than broken into discrete chirps. G. integer can be found in parts of the Western United States, having been recorded from Oregon, California, Arizona and New Mexico.

<i>Gryllus assimilis</i> Species of cricket native to the Western Hemisphere

Gryllus assimilis, commonly known as the Jamaican field cricket and sometimes referred to as the silent cricket among other names, is one of many cricket species known as a field cricket. Its natural habitats are the West Indies and parts of the southern United States, Mexico, and South America, though as a result of widespread breeding programs to supply feeder insects to the pet industry since 2010, it has become available commercially throughout North America and Europe.

Gryllus firmus, commonly known as the sand field cricket, is a species of cricket in the subfamily Gryllinae. It is found in the southeastern United States.

<i>Anurogryllus arboreus</i> Species of cricket

Anurogryllus arboreus, the common short-tailed cricket or arboreal short-tailed cricket, is a species of cricket in the family Gryllidae. It is native to the southern and south-eastern United States where it lives in a burrow that it digs.

<i>Phyllopalpus pulchellus</i> Species of cricket

Phyllopalpus pulchellus, known generally as the red headed bush cricket,handsome trig or handsome bush cricket, is a species of winged bush crickets, trigs in the family Gryllidae. It is found in North America.

Gryllus cayensis, known generally as the keys wood cricket or South Florida taciturn wood cricket, is a species of cricket in the subfamily Gryllinae. It is found in North America.

References

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