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Related Experiment Video

Updated: Feb 7, 2026

Induction and Evaluation of Inbreeding Crosses Using the Ant, Vollenhovia Emeryi

Induction and Evaluation of Inbreeding Crosses Using the Ant, Vollenhovia Emeryi

Published on: October 5, 2018

Lifetime inbreeding depression in a leaf beetle.

Thorben Müller¹, Tabea Dagmar Lamprecht¹, Karin Schrieber^1,2

¹Department of Chemical Ecology Bielefeld University Bielefeld Germany.

Ecology and Evolution

|August 4, 2018

Summary

Mustard leaf beetles experience inbreeding depression across their life cycle, impacting survival and reproduction. Evidence suggests second male sperm precedence, not postcopulatory inbreeding avoidance, influences offspring viability.

Keywords:

Phaedon cochleariae development inbreeding avoidance mating system reproduction second male sperm precedence

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An Experimental Study on Colorado Potato Beetle Hibernation Under Natural Conditions

An Experimental Study on Colorado Potato Beetle Hibernation Under Natural Conditions

Published on: November 17, 2023

Area of Science:

Evolutionary Biology
Ecology
Behavioral Ecology

Background:

Habitat loss and fragmentation drive population declines, increasing inbreeding risk.
Inbreeding depression, a fitness loss from mating relatives, threatens many species.
Mustard leaf beetles (Phaedon cochleariae) exhibit family-specific hydrocarbon profiles, but precopulatory inbreeding avoidance is unlikely.

Purpose of the Study:

Investigate lifetime inbreeding effects on fitness in Phaedon cochleariae.
Examine potential postcopulatory inbreeding avoidance mechanisms in this species.

Main Methods:

Determined larval hatching rates from females sequentially mated with siblings and non-siblings.
Assessed fitness-related traits including larval development, survival, and reproductive output.

Main Results:

Inbred beetles showed prolonged larval development, reduced survival, and lower reproductive output.
Highest hatching rates occurred with non-sibling matings or sibling-first, non-sibling-second pairings.
Lower hatching rates were observed when a sibling was the second male, indicating second male sperm precedence.

Conclusions:

Results do not support postcopulatory inbreeding avoidance in Phaedon cochleariae.
Second male sperm precedence is evident, influencing offspring success.
Polyandry and dispersal behavior may serve as alternative strategies to mitigate inbreeding costs.