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Related Concept Videos

Altruism01:03

Altruism

Altruistic behaviors are “unselfish” behaviors—those that help another individual at the expense of the individual carrying out the behavior. Despite the negative consequences for the altruistic animal, these behaviors are thought to have evolved for several reasons.
Predator-Prey Interactions02:39

Predator-Prey Interactions

Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.
Symbiosis00:58

Symbiosis

Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...
Microbial Interactions: Predation01:28

Microbial Interactions: Predation

Microbial predation refers to the process by which one microorganism kills and consumes another to obtain nutrients and energy. It encompasses both bacterial and protozoan predators. This interaction plays a crucial role in shaping microbial communities and regulating nutrient cycling.Bacterial Predators: Epibiotic vs. EndobioticBacterial predators are classified based on their mode of attack as either epibiotic or endobiotic. Epibiotic predators, such as Vampirococcus, attach to the surface of...
Inclusive Fitness00:57

Inclusive Fitness

Most altruistic behavior—in which one animal helps another at a cost to themselves—occurs between relatives. Scientists think these altruistic behaviors evolved because they increase the inclusive fitness of the animal providing help.
Optimal Foraging00:48

Optimal Foraging

How animals obtain and eat their food is called foraging behavior. Foraging can include searching for plants and hunting for prey and depends on the species and environment.

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Harvesting Venom Toxins from Assassin Bugs and Other Heteropteran Insects
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Altruism during predation in an assassin bug.

Alain Dejean1, Messika Revel, Frédéric Azémar

  • 1Écologie des Forêts de Guyane, Campus agronomique, BP 316, 97379, Kourou cedex, France, alain.dejean@wanadoo.fr.

Die Naturwissenschaften
|August 17, 2013
PubMed
Summary
This summary is machine-generated.

Zelus annulosus assassin bugs exhibit cooperative hunting and communal feeding strategies, particularly in their early nymph stages. This behavior aids in efficient prey capture and consumption, regulating development and reducing cannibalism.

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Area of Science:

  • Ecology
  • Entomology
  • Behavioral Ecology

Background:

  • Zelus annulosus, an assassin bug, inhabits Hirtella physophora, a plant associated with Allomerus decemarticulatus ants.
  • Ants create traps on host trees, influencing insect prey availability and predator-prey dynamics.

Purpose of the Study:

  • To investigate the predatory behavior and social interactions of Zelus annulosus nymphs.
  • To understand the role of communal feeding in nymphal development and survival.

Main Methods:

  • Observational studies of Zelus annulosus on Hirtella physophora.
  • Analysis of nymphal aggregation, prey capture techniques, and feeding behaviors.

Main Results:

  • Early instar nymphs exhibit group ambushing and communal feeding on insects detected from a distance.
  • Sticky setae on forelegs assist in capturing flying or jumping insects.
  • Later instars hunt solitarily but may share large prey with siblings.
  • Communal feeding enhances prey consumption rates and synchronizes nymphal development, potentially reducing cannibalism.

Conclusions:

  • Zelus annulosus displays complex social behaviors, including cooperative hunting and communal feeding, which are crucial for nymphal survival and development.
  • These strategies allow nymphs to exploit resources effectively and mitigate risks associated with predation and cannibalism.