Chironomus zealandicus

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Chironomus zealandicus
Chironomus zealandicus in Otago.jpg
On the Otago Peninsula
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Diptera
Family: Chironomidae
Genus: Chironomus
Species:
C. zealandicus
Binomial name
Chironomus zealandicus
Hudson, 1892

Chironomus zealandicus, commonly known as the New Zealand midge, common midge, or non-biting midge, is an insect of the Chironomidae family that is endemic to New Zealand. The worm-like larvae are known to fisherman and have a common name of blood worm due to their red color and elongated blood gills. [1]

Contents

Description

Pupa (left), adult (center), larva (right) Chironomus zealandicus.jpg
Pupa (left), adult (center), larva (right)

Chironomus zealandicus is a member of the Diptera order (flies with a single pair of wings) and the Chironomidae family (non-biting midges). Species in the genus Chironomus are often confused with mosquitoes, as they look very similar, but taxonomically they are more closely related to New Zealand sandflies than to mosquitoes.

The males of this species have feathery antenna, and the females do not. The feathered antennas allow the insect to be able to walk in the water. The colouration of the species is black or dark segmented parts on the body (abdomen) with green or yellow striping. Chironomus has three types of teeth in its mandible, one single strong apical tooth, three inner subapical teeth, and a single outer apicodorsal tooth. The mentum of Chironomus also has 15 darker pigmented teeth on outer sides and either sides of the teeth. [2] The adult is approximately 5mm in length. [3] The larvae form is blood red and has elongated blood gills on its penultimate abdominal segments. [1]

Distribution and habitat

Chironomus zealandicus is endemic to New Zealand. It was first reported by Hudson in 1892 [4] and was later described taxonomically by Frederick Hutton in 1902 and Kieffer in 1921 with the name Chironomus novae zealandiae. In New Zealand, this species is mostly found in freshwater and lake areas in North Island and South Island, such as in Lake Ngaroto in Hamilton, Lake Rotoroa, Lake Ellesmere / Te Waihora in Canterbury, and other South Island lakes and freshwater areas. [2]

C. zealandicus can be found in swarms in lakes, rivers, and swamps, where they typically breed in slow stagnant water. [5] [1] They are especially found in great numbers in areas which are man-made. [6] The species often lives in areas that suffer from pollution; although, as a result of its make up it can withstand these conditions unlike other midge species such as a green midge larvae related to it. [7] The myoglobin contained in the species (made up of an iron and oxygen-binding protein) helps them survive in habitats they are abundant in such as stagnant, low oxygen water. [5] In New Zealand, the species is common in the lower reaches of the West Coast glaciers, geothermal waters and seashores. [8]

Life cycle

The New Zealand midge has 4 stages in its life cycle. This ranges from egg, larva, pupa and adult. [6] The midge often breeds in swarms in areas of lakes and stagnant water which suits pupae and larvae to breed. [1] Eggs are often laid in numbers up to 3000 and are contained in a gelatinous substance which helps it to attach to objects in the water such as sticks or to river or lake banks. [6] The eggs which are not attached to any material sink to the bottom but this does not stop the eggs ability to hatch on the lake bed. The first stage (the egg) lasts between 2 and 7 days in which it hatches and then feeds on the gelatinous material for a couple of days. It then burrows into the substrate or the material available for it to make its home. [6] Most of the larval stage is spent in a tube constructed from silt. During this stage, they take on a red colour which is where the name blood worm arises from. [1] They spend 2–7 weeks in this form which can be faster or slower due to current water temperatures caused by season weather. After they reach the end of this cycle they pupate. The pupae creates burrows in the sediment layer, where as a pupa its lives in constructed tubes. [1] The pupa stage lasts for up to 3 days where they emerge to the surface by actively swimming and stay on the surface for several hours until the adult form emerges. [6] The adult stage lasts a maximum of 5 days in which they breed in swarms at night and then die. In the right conditions with regards to water temperature and season, the full life cycle can be completed within two weeks.

Diet and foraging

The adult stage does not eat and this contributes to its short life; it is known as a non-biter unlike some related species. [6] During undulations which are created by using 2-elongated blood gills filters oxygen and nutrients past them in the water layer. [1] In New Zealand there are a wide range of strategies the midge uses as the fauna are so diverse. [8] With this diversity in food selection it is able to get sources of nutrients from algae, microorganisms, invertebrates, macrophytes, and woody debris. [8]

Predators, parasites, and diseases

The midge from the larva, pupa and adult form is predated on by river fish and other aquatic vertebrates such as indigenous minnows. [7] Examples of this are small trout which will come up and feed on the swarms above and on the surface of the water on warm nights. [7] Other invertebrates such as arthropods are known to prey on midges, this is usually through chance due to swarms landing or getting caught in webs. [9] Chironomus suffer deforming in the head capsules. A study by Jeyasingham and Ling has shown that the incidence of deformity increased during summer in larvae, the cause to this incidence is season, genetic factors and sediment chemistry which may have caused problems to the deformity of the Chironomus capsule heads. [2]

Related Research Articles

<span class="mw-page-title-main">Mosquito</span> Family of flies

Mosquitoes are approximately 3,600 species of small flies comprising the family Culicidae. The word "mosquito" is Spanish for "little fly". Mosquitoes have a slender segmented body, one pair of wings, one pair of halteres, three pairs of long hair-like legs, and elongated mouthparts.

<span class="mw-page-title-main">Fly</span> Order of insects

Flies are insects of the order Diptera, the name being derived from the Greek δι- di- "two", and πτερόν pteron "wing". Insects of this order use only a single pair of wings to fly, the hindwings having evolved into advanced mechanosensory organs known as halteres, which act as high-speed sensors of rotational movement and allow dipterans to perform advanced aerobatics. Diptera is a large order containing an estimated 1,000,000 species including horse-flies, crane flies, hoverflies, mosquitoes and others, although only about 125,000 species have been described.

<i>Anopheles</i> Genus of mosquito

Anopheles or Marsh Mosquitoes is a genus of mosquito first described and named by J. W. Meigen in 1818. About 460 species are recognized; while over 100 can transmit human malaria, only 30–40 commonly transmit parasites of the genus Plasmodium, which cause malaria in humans in endemic areas. Anopheles gambiae is one of the best known, because of its predominant role in the transmission of the most dangerous malaria parasite species – Plasmodium falciparum.

<span class="mw-page-title-main">Midge</span> Common name for several species of flies

A midge is any small fly, including species in several families of non-mosquito Nematoceran Diptera. Midges are found on practically every land area outside permanently arid deserts and the frigid zones. Some midges, such as many Phlebotominae and Simuliidae, are vectors of various diseases. Many others play useful roles as prey for insectivores, such as various frogs and swallows. Others are important as detritivores, and form part of various nutrient cycles. The habits of midges vary greatly from species to species, though within any particular family, midges commonly have similar ecological roles.

<i>Arachnocampa</i> Genus of flies

Arachnocampa is a genus of nine fungus gnat species which have a bioluminescent larval stage, akin to the larval stage of glowworm beetles. The species of Arachnocampa are endemic to Australia and New Zealand, dwelling in caves and grottos, or sheltered places in forests.

<span class="mw-page-title-main">Nematocera</span> Suborder of flies

The Nematocera are a suborder of elongated flies with thin, segmented antennae and mostly aquatic larvae. This group is paraphyletic and contains all flies but species from suborder Brachycera, which includes more commonly known species such as the housefly or the common fruit fly. Families in Nematocera include mosquitoes, crane flies, gnats, black flies, and multiple families commonly known as midges. The Nematocera typically have fairly long, fine, finely-jointed antennae. In many species, such as most mosquitoes, the female antennae are more or less threadlike, but the males have spectacularly plumose antennae.

<span class="mw-page-title-main">Ceratopogonidae</span> Family of flies commonly known as no see ums, or biting midges

Ceratopogonidae is a family of flies commonly known as no-see-ums, or biting midges, generally 1–3 millimetres in length. The family includes more than 5,000 species, distributed worldwide, apart from the Antarctic and the Arctic.

<span class="mw-page-title-main">Chironomidae</span> Family of flies

The Chironomidae comprise a family of nematoceran flies with a global distribution. They are closely related to the Ceratopogonidae, Simuliidae, and Thaumaleidae. Many species superficially resemble mosquitoes, but they lack the wing scales and elongated mouthparts of the Culicidae.

<span class="mw-page-title-main">Chaoboridae</span> Family of flies

Chaoboridae, commonly known as phantom midges or glassworms, is a family of fairly common midges with a cosmopolitan distribution. They are closely related to the Corethrellidae and Chironomidae; the adults are differentiated through peculiarities in wing venation.

<span class="mw-page-title-main">Chironomoidea</span> Superfamily of flies

The Chironomoidea are a superfamily within the order Diptera, suborder Nematocera, infraorder Culicomorpha. This superfamily contains the families Chironomidae, Ceratopogonidae, Simuliidae, and Thaumaleidae.

<span class="mw-page-title-main">Culicinae</span> Subfamily of flies

The Culicinae are the most extensive subfamily of mosquitoes (Culicidae) and have species in every continent except Antarctica, but are highly concentrated in tropical areas. Mosquitoes are best known as parasites to many vertebrate animals and vectors for disease. They are holometabolous insects, and most species lay their eggs in stagnant water, to benefit their aquatic larval stage.

<i>Chironomus plumosus</i> Species of fly

Chironomus plumosus, also known as the buzzer midge, is a species of nonbiting midge (Chironomidae) that occurs throughout areas in the Northern Hemisphere.

<i>Chironomus</i> Genus of flies

Chironomus is a genus of nonbiting midges in the subfamily Chironominae of the bloodworm family, Chironomidae, containing several cryptic species that can only be distinguished by experts based on the characteristics of their giant chromosomes.

Mansonella ozzardi is a filarial (arthropod-borne) nematode (roundworm). This filarial nematode is one of two that causes serous cavity filariasis in humans. The other filarial nematode that causes it in humans is Mansonella perstans. M. ozzardi is an endoparasite that inhabits the serous cavity of the abdomen in the human host. It lives within the mesenteries, peritoneum, and in the subcutaneous tissue.

Chironomus riparius, also known as Chironomus thummi and commonly known as the harlequin fly, is a species of non-biting midge. Their larvae are known by the common name of blood worm due to their red colouration. It is common in both North America and Europe. The species was described in 1804 by Johann Wilhelm Meigen. C. riparius has been used extensively as a model for genome structure analysis in insects and is also used in toxicology tests and functional developmental genetic studies. Both their adult and larval forms have been implicated as disease vectors but are also an important part of freshwater food chains.

<span class="mw-page-title-main">Gnat</span> Any of many species of tiny flying insects in the dipterid suborder Nematocera

A gnat is any of many species of tiny flying insects in the dipterid suborder Nematocera, especially those in the families Mycetophilidae, Anisopodidae and Sciaridae. They can be both biting and non-biting. Most often they fly in large numbers, called clouds. "Gnat" is a loose descriptive category rather than a phylogenetic or other technical term, so there is no scientific consensus on what constitutes a gnat. Some entomologists consider only non-biting flies to be gnats. Certain universities and institutes also distinguish eye gnats: the Smithsonian Institution describes them as "non-biting flies, no bigger than a few grains of salt, ... attracted to fluids secreted by your eyes".

<i>Bezzia nobilis</i> Species of fly

Bezzia nobilis is a species of biting midges in the family Ceratopogonidae. It is widely considered one of the most common Bezzia species; it is found in Eurasian regions, all over the United States, Central America, and even into South American countries like Brazil. B. nobilis seem to prefer aquatic environments; they are commonly observed in stagnant water pools in Eurasia regions and marshes in the southern United States. Adults of this species are easily distinguished by their black and yellow striped legs. Pupae are recognized by their brown bodies, abdominal spines, and respiratory horns. B. nobilis larvae are distinguished by brown heads and white bodies. Little information is known on their life cycle or mating habits. B. nobilis is a predatory species. While some research suggests they mainly feed on larvae of other insect species, experiments suggest they prefer immobile, easy prey such as dead adult flies, bacteria, and protozoa.

<i>Opifex fuscus</i> Species of insect

Opifex fuscus, known commonly as the saltpool mosquito or by its Māori name naeroa, is an endemic mosquito that is widespread along the coast of New Zealand.

Chironomus annularius is a species of non-biting midge in the family Chironomidae. It is usually found in regions with bodies of fresh water but can be found in almost every environment. It tends to form "hotspots" around specific areas. The species is distinguished by the size of its chromosomes and the lack of a proboscis.

<i>Tokunagayusurika akamusi</i> Species of fly

Tokunagayusurika akamusi is a midge fly species of the family Chironomidae, commonly called "nonbiting midges" or "lake flies."

References

  1. 1 2 3 4 5 6 7 Miller, D. (1971). Common Insects in New Zealand. Wellington: A. H. & A. W. Reed Ltd.
  2. 1 2 3 Jeyasingham, Kanapathippillai; Ling, Nicholas (June 1997). "Head capsule deformities in (Diptera: Chironomidae): Influence of site and substrate". New Zealand Journal of Marine and Freshwater Research. 31 (2): 175–184. doi:10.1080/00288330.1997.9516756.
  3. Hare, McLintock, Alexander; College, Roy Alexander Harrison, D.SC., Senior Lecturer in Agricultural Zoology, Lincoln Agricultural; Taonga, New Zealand Ministry for Culture and Heritage Te Manatu. "MIDGE". www.teara.govt.nz.{{cite web}}: CS1 maint: multiple names: authors list (link)
  4. Hudson, George Vernon (1892). An elementary manual of New Zealand entomology; being an introduction to the study of our native insects. London: West, Newman & Co. pp. 43–45. doi:10.5962/bhl.title.29214.
  5. 1 2 "T.E.R:R.A.I.N – Taranaki Educational Resource: Research, Analysis and Information Network – Midge (Chironomus zealandicus)". www.terrain.net.nz.
  6. 1 2 3 4 5 6 Koehler, P. G. (1980). Blind Mosquitoes (Aquatic Midges). Florida: University of Florida.
  7. 1 2 3 Draper, K. (1971). Trout Flies in New Zealand. Wellington: A. H. & A. W. Reed Ltd.
  8. 1 2 3 Gordon, D. (2010). New Zealand Inventory Of Biodiversity: Volumer 2 Kingdom Animalia Chaetognatha, Ecdysozoa, Ichnofossils. Christchurch: Canterbury University Press.
  9. Dreyer; Hoekman & Gratton (2016). "Positive indirect effect of aquatic insects on terrestrial prey is not offset by increased predator density". Ecol Entomol. 41 (Ecol Entomol): 61–71. doi:10.1111/een.12272. S2CID   84077239.