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| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| Reproductive interference | 1/4 | https://en.wikipedia.org/wiki/Reproductive_interference | reference | science, encyclopedia | 2026-05-05T07:16:39.962893+00:00 | kb-cron |
Reproductive interference is the interaction between individuals of different species during mate acquisition that leads to a reduction of fitness in one or more of the individuals involved. The interactions occur when individuals make mistakes or are unable to recognise their own species, labelled as ‘incomplete species recognition'. Reproductive interference has been found within a variety of taxa, including insects, mammals, birds, amphibians, marine organisms, and plants. There are seven causes of reproductive interference, namely signal jamming, heterospecific rivalry, misdirected courtship, heterospecific mating attempts, erroneous female choice, heterospecific mating, and hybridisation. All types have fitness costs on the participating individuals, generally from a reduction in reproductive success, a waste of gametes, and the expenditure of energy and nutrients. These costs are variable and dependent on numerous factors, such as the cause of reproductive interference, the sex of the parent, and the species involved. Reproductive interference occurs between species that occupy the same habitat and can play a role in influencing the coexistence of these species. It differs from competition as reproductive interference does not occur due to a shared resource. Reproductive interference can have ecological consequences, such as through the segregation of species both spatially and temporally. It can also have evolutionary consequences, for example; it can impose a selective pressure on the affected species to evolve traits that better distinguish themselves from other species.
== Causes of reproductive interference == Reproductive interference can occur at different stages of mating, from locating a potential mate, to the fertilisation of an individual of a different species. There are seven causes of reproductive interference that each have their own consequences on the fitness of one or both of the involved individuals.
=== Signal jamming === Signal jamming refers to the interference of one signal by another. Jamming can occur by signals emitted from environmental sources (e.g. noise pollution), or from other species. In the context of reproductive interference, signal jamming only refers to the disruption of the transmission or retrieval of signals by another species. The process of mate attraction and acquisition involves signals to aid in locating and recognising potential mates. Signals can also give the receiver an indication of the quality of a potential mate. Signal jamming can occur in different types of communication. Auditory signal jamming, otherwise labelled as auditory masking, is when a noisy environment created by heterospecific signals causes difficulties in identifying conspecifics. Likewise in chemical signals, pheromones that are meant to attract conspecifics and drive off others may overlap with heterospecific pheromones, leading to confusion. Difficulties in recognising and locating conspecifics can result in a reduction of encounters with potential mates and a decrease in mating frequencies.
==== Examples ====
Vibrational signalling in the American grapevine leafhopper - Individuals of the American grapevine leafhopper communicate with each other through vibrational signals that they transmit through the host plant. American grapevine leafhoppers are receptive of signals within their receptor’s sensitivity range of 50 to 1000 Hz. The vibrations can be used to identify and locate potential female mates. To successfully communicate, a duet is performed between the male and female American grapevine leafhopper. The female replies within a specific timeframe after the male signal, and the male may use the timing of her reply to identify her. However, vibrational signals are prone to disruption and masking by heterospecific signals, conspecific signals, and background noise that are within their species-specific sensitivity range. The interference of the duet between a male and female American grapevine leafhopper can reduce the male’s success in identifying and locating the female, which can reduce the frequency of mating.