Chaoborus astictopus

Dyar & Shannon, 1924

Clear Lake gnat

Chaoborus astictopus is a phantom midge ( Chaoboridae) commonly known as the Clear Lake gnat. The has a with emerging in spring. Older larvae exhibit diel vertical , occupying deep profundal zones during daylight hours and moving to open waters at night, indicating negative . The species has been studied as a target for control and is known to microsporidian and fungal .

Chaoborus astictopus by (c) Don Loarie, some rights reserved (CC BY). Used under a CC-BY license.Chaoborus astictopus by (c) Don Loarie, some rights reserved (CC BY), uploaded by Don Loarie. Used under a CC-BY license.Chaoborus astictopus by (c) Don Loarie, some rights reserved (CC BY), uploaded by Don Loarie. Used under a CC-BY license.

Pronunciation

How to pronounce Chaoborus astictopus: //keɪˈoʊbərɪs əˌstɪkˈtoʊpəs//

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Habitat

Permanent lentic including lakes, ponds, and . Older larvae occupy the profundal zone (deep, bottom waters) during daylight and migrate to open waters at night.

Seasonality

emerge in spring. with one per year.

Host Associations

  • Thelohania corethrae - Microsporidian ( Nosematidae); occur during winter season
  • Tolypocladium cylindrosporum - Fungal

Life Cycle

(one per year). Larvae are aquatic.

Behavior

Older larvae exhibit negative , with diel vertical between profundal zones during day and open waters at night.

Ecological Role

Target organism for control studies in managed water bodies; larval stage functions as part of aquatic in lentic .

Human Relevance

Subject of efficacy studies for control in aquatic environments; references association with Clear Lake.

More Details

Pathogen susceptibility

Larvae are vulnerable to Thelohania corethrae during winter and susceptible to Tolypocladium cylindrosporum .

Research history

and patterns have been studied using application methods to track parameters.

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Sources and further reading