A behavioral ecology perspective on inbreeding and inbreeding depression

Richardson, Jon; Smiseth, Per T.

doi:10.1016/bs.asb.2022.11.002

Cited by 3 publications

(1 citation statement)

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“…In such cases, the frequency of alleles can become more homogenous, leading to the occurrence of homozygosity by state. This type of homozygosity is essential in understanding how genetic diversity can be influenced by random events in small and isolated populations, even when there is no significant shared ancestry [ 6 ].…”

Section: Reviewmentioning

confidence: 99%

The Impact of Increased Homozygosity on Human Fertility: A Comprehensive Review

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Muneshwar,

Agrawal

et al. 2023

Cureus

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This comprehensive review explores the multifaceted relationship between increased homozygosity and human fertility, delving into the genetic, ethical, cultural, and public health dimensions of this complex phenomenon. Homozygosity, characterized by identical alleles at specific gene loci, can result from consanguineous marriages, genetic drift, and population isolation. The review highlights key findings, including the heightened risk of recessive genetic disorders, the implications for immune system diversity, and the influence on complex traits and diseases. It underscores the critical role of genetic counseling in addressing these consequences, considering the ethical implications, and respecting cultural practices. The delicate balance between genetic diversity and cultural norms is emphasized, calling for increased awareness and community engagement. Looking ahead, the review suggests emerging technologies, longitudinal studies, and interdisciplinary research as crucial avenues for further exploration, with the ultimate goal of informing effective public health policies and interventions that safeguard genetic diversity and cultural traditions for future generations.

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Section: Reviewmentioning

confidence: 99%

The Impact of Increased Homozygosity on Human Fertility: A Comprehensive Review

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Muneshwar,

Agrawal

et al. 2023

Cureus

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Juveniles of a biparental cichlid fish compensate lack of parental protection by improved shoaling performance

Zacke,

Thünken

2024

Behav Ecol Sociobiol

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Parental brood care greatly affects offspring’s fitness, but the specific effects of care on the collective behaviour of independent offspring are less well understood. It has been suggested that the loss of care induces increased sibling cooperation to compensate parental contributions. However, the empirical evidence is ambiguous. Here, we examined how the loss of early parental care affects the collective behaviour, i.e. shoaling performance of independent juveniles in a genetically heterogeneous lab-population of the biparental cichlid fish Pelvicachromis pulcher. Applying a split-clutch design, we reared in- and outbred offspring with or without parents. In the experiment, we examined shoal density (inter-individual distance) in relation to body size of the shoaling fish. Dense shoaling reduces predation risk and small fish may benefit strongest because they are particularly vulnerable to predation by gape-limited predators. Juveniles reared without parents formed denser shoals and they adjusted shoaling behaviour depending on own body size compared to juveniles reared with parents; especially smaller fish formed dense shoals. Inbreeding did not significantly affect shoaling performance. This indicates that juveniles compensate missing parental care by adjusting their shoaling behaviour depending on own vulnerability. Our study contributes to the understanding of the co-evolution of brood care and sibling cooperation.

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Long-term health outcomes from inbreeding in a historical Swedish population: longevity, fertility, and impairments

Gunfridsson,

Vikström

2024

Annals of Human Biology

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A behavioral ecology perspective on inbreeding and inbreeding depression

Cited by 3 publications

References 60 publications

The Impact of Increased Homozygosity on Human Fertility: A Comprehensive Review

The Impact of Increased Homozygosity on Human Fertility: A Comprehensive Review

Juveniles of a biparental cichlid fish compensate lack of parental protection by improved shoaling performance

Long-term health outcomes from inbreeding in a historical Swedish population: longevity, fertility, and impairments

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