Galanin neuron activation in feeding, parental care, and infanticide in a mouthbrooding African cichlid fish

Butler, Julie M.; Herath, Erandi M.; Rimal, Arohan; Whitlow, Sarah M.; Maruska, Karen P.

doi:10.1016/j.yhbeh.2020.104870

Cited by 22 publications

(19 citation statements)

References 45 publications

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“…Butler et al . (2020) showed that activation of galanin neurons in the lateral tuberal nucleus of the brain is associated with feeding and offspring cannibalism in mouthbrooding female cichlids Astatotilapia burtoni . Serum oxytocin levels are known to be lower in female dogs that have cannibalised their pups relative to females that have not (Kockaya et al ., 2018).…”

Section: Future Directionsmentioning

confidence: 99%

“…In the event of receiving a small brood, males that resort to full-brood cannibalism can once again produce the androgens necessary to resume courtship and re-mating (Matsumoto et al, 2018). Butler et al (2020) showed that activation of galanin neurons in the lateral tuberal nucleus of the brain is associated with feeding and offspring cannibalism in mouthbrooding female cichlids Astatotilapia burtoni. Serum oxytocin levels are known to be lower in female dogs that have cannibalised their pups relative to females that have not (Kockaya et al, 2018).…”

Section: (D) Mechanisms Of Controlmentioning

confidence: 99%

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Parent–offspring cannibalism throughout the animal kingdom: a review of adaptive hypotheses

Bose

2022

Biological Reviews

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Parents that kill and consume their offspring often appear to be acting against their own reproductive interests. Yet parentoffspring cannibalism is common and taxonomically widespread across the animal kingdom. In this review, I provide an overview of our current understanding of parent-offspring cannibalism, which has seen a proliferation in adaptive hypotheses over the past 20 years for why parents consume their own young. I review over four decades of research into this perplexing behaviour, drawing from work conducted on fishes, reptiles, insects, birds, and mammals among other taxa. Many factors have been hypothesised to explain parent-offspring cannibalism in nature, including poor parental energy reserves, small or large brood sizes, low or uncertain parentage, and high brood densities, and additional factors are still being uncovered. Parent-offspring cannibalism does not appear to have a single predominant explanation; rather, the factor, or set of factors, that govern its expression is largely taxon specific. Parents may either consume all offspring under their care (fullbrood cannibalism) or consume a fraction of their offspring (partial brood cannibalism). These forms of cannibalism are thought to provide adaptive benefits to cannibals under a range of circumstances, primarily by allowing parents to allocate parental efforts more optimallyenergy from eating (some of) one's current offspring can be redirected to other offspring, or to parental growth, survival, and ultimately to other future reproductive endeavours. Thus, parent-offspring cannibalism is a phenotypically plastic trait that responds to changing environmental, social, and physiological conditions. The expression of parent-offspring cannibalism in any given system is intimately linked to the reproductive value of current young relative to parents' expectations for future reproduction, and also to whether parental care is predominantly depreciable or non-depreciable. Furthermore, parent-offspring cannibalism has the potential to generate conflict between the sexes, and I briefly discuss some consequences of this conflict on patterns of mate choice. Finally, there still remain many aspects of this behaviour where our understanding is poor, and I highlight these topics to help guide future research.

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Section: Future Directionsmentioning

confidence: 99%

Section: (D) Mechanisms Of Controlmentioning

confidence: 99%

Parent–offspring cannibalism throughout the animal kingdom: a review of adaptive hypotheses

Bose

2022

Biological Reviews

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“…55-58), we know very little about the mechanisms underlying variation in pair bond strength and mate fidelity or how offspring signals might affect these mechanisms. Similarly, the neural substrates of parental care have been studied in some detail (e.g., [59][60][61], though how offspring signals modulate these processes is poorly understood (but see 62). However, these studies recommend neuromodulators such as dopamine and the nonapeptides arginine vasopressin and oxytocin as promising candidates, along with the hormone prolactin, likely acting through the medial preoptic area (a central node in social decision-making network across vertebrates 63).…”

Section: Discussionmentioning

confidence: 99%

Sex differences in parental response to offspring begging are associated with pair bond strength across birds

Shana

Hofmann

2021

Preprint

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Mothers, fathers, and offspring regularly clash over how much care offspring receive. Offspring beg to solicit for more resources--but how much begging is rewarded can depend on who is listening. While both parents benefit from provisioning offspring, each would benefit from their partner shouldering more of the burden of care, leading to sexual conflict. Additionally, if the costs and benefits of provisioning differ by sex, parent-offspring conflict should vary by sex. How these evolutionary conflicts influence sex differences in parent-offspring communication is unknown. To determine whether the sexes differ in their response to offspring signals, we conducted a meta-analysis on 30 bird species, comparing responsiveness to social and physiological traits affecting conflict. We found that a species' typical pair bond strength predicts whether males or females respond more to offspring begging. In species with stable and/or monogamous bonds, and thus lower sexual and paternal-offspring conflict, males' provisioning effort is more strongly correlated with offspring begging than females'. The opposite holds for species with weak pair bonds: females respond more to begging, perhaps compensating for males' lower responsiveness. These results demonstrate that sex differences in parental care can arise via sex differences in parent-offspring communication, driven by evolutionary conflicts.

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“…Although in midshipman fish, Porichthys notatus , GAL presented no relation to nesting behaviour (Tripp et al, 2020), in the cichlid fish Astatotilapia burtoni (Cichlidae), the activation of GAL neurons in the POA were related to maternal mouthbrooding care (Butler et al, 2020). Midshipman male fish care for the fry in the nest, not in their mouth, although substrate brooding requires more aggressive displays than mouthbrooding (Butler et al, 2020). Thus, the behavioural differences observed in A. burtoni and P. notatus involving GAL action may indicate that this peptide is more related with the agonistic part of the reproductive behaviour.…”

Section: Physiological Mechanisms Underlying Nest Buildingmentioning

confidence: 99%

Integrative approach on the diversity of nesting behaviour in fishes

2021

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Nests are the key elements of the reproductive repertoire of several fish species. Understanding the physiological aspects behind their nesting behaviour is imperative to improve our knowledge about behavioural mechanisms focusing on species conservation. Nevertheless, current knowledge on fish nesting is still underexplored. Here, we show a synthesis based on an integrative approach for understanding the diversity of nesting behaviour in fish. Because a nest sometimes does not involve new buildings (as in birds), we suggest a more comprehensive definition based on the behaviour instead of the structure per se. Forty fish families were recorded as they made nests, which were sorted into six main types: bowls, burrows, foam nests, nests made of plant matter and animal parts, besides nests made on clean rock surfaces. Besides spawning and parental care, these nests also serve as a refuge against predators and male competitors, as targets for sexual selection, including bowers with no parental care function, and badges of social status. We showed that, although it is advantageous to what the Darwinian fitness of the species is concerned, nesting also requires time and energy. We propose an evolution of nest types and functions, from the ancestral bowl used as refuge to derived foam nests with sexual selection functions. Physiologically, nesting is controlled by the HPG axis and particular brain circuits, this probably being the less explored subject. Finally, we highlighted that, in the changing world of the Anthropocene, nesting behaviour emerges as a framework to indicate the quality of the aquatic environments.

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Galanin neuron activation in feeding, parental care, and infanticide in a mouthbrooding African cichlid fish

Cited by 22 publications

References 45 publications

Parent–offspring cannibalism throughout the animal kingdom: a review of adaptive hypotheses

Parent–offspring cannibalism throughout the animal kingdom: a review of adaptive hypotheses

Sex differences in parental response to offspring begging are associated with pair bond strength across birds

Integrative approach on the diversity of nesting behaviour in fishes

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