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Related Experiment Videos

Turtles.

Gerald G Marten1

  • 1New Orleans Mosquito and Termite Control Board, 6601 Stars & Stripes Blvd., New Orleans, LA 70126, USA.

Journal of the American Mosquito Control Association
|September 15, 2007
PubMed
Summary
This summary is machine-generated.

Juvenile turtles effectively control mosquito populations by consuming hundreds daily. Field trials show turtles eliminate mosquito production in water tanks and significantly reduce larvae in ditches, posing no Salmonella risk in these habitats.

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Area of Science:

  • Ecology
  • Vector Control
  • Environmental Science

Background:

  • Mosquitoes, particularly those transmitting diseases like dengue, pose a significant public health challenge.
  • Traditional mosquito control methods face limitations and require complementary strategies.
  • Aquatic habitats like water-storage tanks and roadside ditches are primary breeding grounds for various mosquito species.

Purpose of the Study:

  • To evaluate the efficacy of juvenile turtles as a biological control agent for mosquito larvae in different aquatic environments.
  • To assess the potential risks associated with introducing turtles into mosquito breeding habitats, specifically regarding Salmonella transmission.
  • To determine the practical applicability of turtle-based mosquito control in diverse settings.

Main Methods:

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  • Field trials were conducted in Honduras for dengue control and in Louisiana for Culex quinquefasciatus control.
  • Juvenile turtles were introduced into water-storage tanks and residential roadside ditches.
  • Mosquito production and larval/pupal presence were monitored before and after turtle introduction.
  • Salmonella presence was assessed in turtles and water samples from different containment scenarios.

Main Results:

  • A single juvenile turtle consumed over 500 mosquito larvae (3rd and 4th instar) per day.
  • Introduction of turtles into water-storage tanks completely eliminated mosquito production.
  • In roadside ditches, turtles reduced Culex quinquefasciatus larvae and pupae by over 99%.
  • Turtles did not pose a Salmonella hazard in water-storage tanks or other mosquito-breeding habitats, although they can be carriers in small pet containers.

Conclusions:

  • Juvenile turtles are highly effective predators of mosquito larvae and can significantly reduce or eliminate mosquito populations in controlled aquatic environments.
  • Turtles present a safe and effective biological control method for mosquito-borne diseases in water-storage tanks and potentially in storm-water catch basins or holding ponds.
  • While not practical for all environments like roadside ditches, turtles offer a promising, eco-friendly alternative for specific mosquito control applications.