1
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Zou J, Bian B, Li M, Liu G. The interrelationship between sleep disturbance symptoms and aggression before and after the campus closure of the COVID-19 pandemic: insight from a cross-lagged panel network model. Front Public Health 2024; 12:1357018. [PMID: 38577287 PMCID: PMC10991807 DOI: 10.3389/fpubh.2024.1357018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Accepted: 02/20/2024] [Indexed: 04/06/2024] Open
Abstract
Background The COVID-19 pandemic is detrimental to sleep quality and increases aggression among college students. Nevertheless, relevant studies were rare. Hence, we collected longitudinal data during and post-campus closure in the current study to investigate the relationship between sleep disturbance and aggression. Methods Data from 665 college students (59.2% females, Meanage = 19.01, SD age = 1.25) were collected before (wave 1) and after (wave 2) the campus closure of COVID-19. All participants were asked to fill out the Buss-Perry Aggression Questionnaire and the Youth Self-Rating Insomnia Scale. Two symptom networks and a cross-lagged panel network were formed and tested. Results Hostility has the highest centrality in the symptom network both in waves 1 and 2, and it bridges sleep disturbance and aggression. "Easily be woken" - "wake up too early" and "wake up with tired" - "function hindrance" are two important symptom associations in networks of waves 1 and 2. All symptoms except "difficulty in falling asleep" and "easily be woken" ameliorated after closure. Moreover, "physical aggression" and "hostility" can trigger other symptoms in wave 2. Conclusion As the first study about aggression and sleep disturbance in the background of COVID-19, we provide valuable information about the relationship between sleep disturbance and aggression on the symptom dimension.
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Affiliation(s)
- Jinhua Zou
- Lianyungang Fourth People's Hospital, Lianyungang, China
| | - Baohua Bian
- Lianyungang Fourth People's Hospital, Lianyungang, China
| | - Min Li
- Department of Psychiatry, Affiliated Nanjing Brain Hospital, Nanjing Medical University, Nanjing, China
| | - Gang Liu
- Department of Psychiatry, Affiliated Nanjing Brain Hospital, Nanjing Medical University, Nanjing, China
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2
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Benvenuto C, Lorenzi MC. Social regulation of reproduction: control or signal? Trends Ecol Evol 2023; 38:1028-1040. [PMID: 37385846 DOI: 10.1016/j.tree.2023.05.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 05/12/2023] [Accepted: 05/12/2023] [Indexed: 07/01/2023]
Abstract
Traditionally, dominant breeders have been considered to be able to control the reproduction of other individuals in multimember groups that have high variance in reproductive success/reproductive skew (e.g., forced sterility/coercion of conspecifics in eusocial animals; sex-change suppression in sequential hermaphrodites). These actions are typically presented as active impositions by reproductively dominant individuals. However, how can individuals regulate the reproductive physiology of others? Alternatively, all contestants make reproductive decisions, and less successful individuals self-downregulate reproduction in the presence of dominant breeders. Shifting perspective from a top-down manipulation to a broader view, which includes all contenders, and using a multitaxon approach, we propose a unifying framework for the resolution of reproductive skew conflicts based on signalling rather than control, along a continuum of levels of strategic regulation of reproduction.
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Affiliation(s)
- Chiara Benvenuto
- School of Science, Engineering, and Environment, University of Salford, Salford, UK.
| | - Maria Cristina Lorenzi
- Laboratoire d'Ethologie Expérimentale et Comparée (LEEC), Université Sorbonne Paris Nord, Villetaneuse, France
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3
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van Iersel R, Boiten G, Pinxten R, Eens M. Untangling behaviours: independent expressions of female-female aggression and snake-like hissing in the blue tit (Cyanistes caeruleus). Sci Rep 2023; 13:16346. [PMID: 37770619 PMCID: PMC10539291 DOI: 10.1038/s41598-023-43652-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 09/26/2023] [Indexed: 09/30/2023] Open
Abstract
Aggression plays a crucial role in deterring predators and securing resources to promote fitness. Nevertheless, studies focussing on female aggression remain scarce. In songbirds, aggression is prevalent during the breeding season, when same-sex individuals compete for limited resources. Additionally, females of some bird species exhibit snake-like hissing behaviour during incubation presumably to lower predation rates and improve fitness. Such behaviours may co-vary, forming a behavioural syndrome that could constrain trait expression. Here, we investigated a resident population of blue tits (Cyanistes caeruleus), to examine the repeatability and covariation of female-female aggression and hissing behaviour, aiming to determine if these constitute a behavioural syndrome. We quantified female-female aggression during simulated territorial intrusions and measured number of hissing calls in response to a simulated predator intrusion into the nest box. We found that both female-female aggression and hissing behaviour were repeatable traits, and that older females approached the intruder less. However, we found no evidence of covariation between female-female aggression and hissing behaviour. Thus, our findings suggest that female-female aggression and hissing behaviour, although both displayed in a nest defence context, are evolutionarily independent traits in the blue tit.
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Affiliation(s)
- Robin van Iersel
- Department of Biology, Behavioural Ecology and Ecophysiology Group, University of Antwerp, Universiteitsplein 1, 2610, Antwerp, Belgium.
| | - Gust Boiten
- Department of Biology, Behavioural Ecology and Ecophysiology Group, University of Antwerp, Universiteitsplein 1, 2610, Antwerp, Belgium
| | - Rianne Pinxten
- Department of Biology, Behavioural Ecology and Ecophysiology Group, University of Antwerp, Universiteitsplein 1, 2610, Antwerp, Belgium
- Research Group Didactica, Antwerp School of Education, University of Antwerp, 2610, Antwerp, Belgium
| | - Marcel Eens
- Department of Biology, Behavioural Ecology and Ecophysiology Group, University of Antwerp, Universiteitsplein 1, 2610, Antwerp, Belgium
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4
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Baxter CM, Shams I, Dworkin I, Dukas R. Genetic correlation between aggressive signals and fighting. Biol Lett 2023; 19:20220616. [PMID: 37073527 PMCID: PMC10114015 DOI: 10.1098/rsbl.2022.0616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Accepted: 03/29/2023] [Indexed: 04/20/2023] Open
Abstract
Theoretical analyses indicate that aggressive signals should positively correlate with the signallers' willingness and abilities to fight. Few experimental studies, however, have tested this prediction. In two experiments employing distinct, ecologically realistic protocols, we quantified the association between aggressive signals and fighting in fruit fly genotypes and found high positive genetic correlations between threat and fighting (rG = 0.80 and 0.74). Our results add to the growing body of experimental work indicating that aggressive signals have relatively high informational value.
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Affiliation(s)
- Carling M. Baxter
- Department of Psychology, Neuroscience & Behaviour, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4K1
| | - Ieta Shams
- Department of Psychology, Neuroscience & Behaviour, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4K1
| | - Ian Dworkin
- Department of Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4K1
| | - Reuven Dukas
- Department of Psychology, Neuroscience & Behaviour, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4K1
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5
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Boiten G, van Iersel R, Pinxten R, Eens M. Females Are More Aggressive Than Males towards Same- and Opposite-Sex Intruders in the Blue Tit ( Cyanistes caeruleus). Animals (Basel) 2023; 13:ani13040585. [PMID: 36830372 PMCID: PMC9951734 DOI: 10.3390/ani13040585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 02/03/2023] [Accepted: 02/06/2023] [Indexed: 02/11/2023] Open
Abstract
During the breeding season, aggression is expressed to gain access to resources such as territories and mates and protect offspring. Female aggressiveness has received much less attention than male aggressiveness, and few studies have examined female and male aggressiveness towards intruders of both sexes in the same species. We compared female and male aggressiveness towards same- and opposite-sex intruders during the egg-laying period in blue tits (Cyanistes caeruleus) using simulated territorial intrusions. For each sex, we examined the occurrence of different behavioural responses during agonistic encounters, and compared the intensity and individual consistency of intra- and inter-sexual aggression using same- and opposite-sex taxidermy mounts. Our results show that females are the more aggressive sex. Both sexes showed similar behaviours during simulated intrusions, although females were never observed singing and males never entered the nest box. In females, aggression was predominantly independent of the sex of the intruder, while males sang more from a distance during male-male encounters. The relative levels of aggression (pecking and perching on the mounts) during intra- and intersexual conflicts were consistent for females, but not for males. Females might be under stronger selection for aggressive phenotypes due to nest-hole competition and larger reproductive investments.
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Affiliation(s)
- Gust Boiten
- Behavioural Ecology and Ecophysiology Group, Department of Biology, University of Antwerp, 2610 Antwerp, Belgium
- Correspondence:
| | - Robin van Iersel
- Behavioural Ecology and Ecophysiology Group, Department of Biology, University of Antwerp, 2610 Antwerp, Belgium
| | - Rianne Pinxten
- Behavioural Ecology and Ecophysiology Group, Department of Biology, University of Antwerp, 2610 Antwerp, Belgium
- Research Group Didactica, Antwerp School of Education, University of Antwerp, 2610 Antwerp, Belgium
| | - Marcel Eens
- Behavioural Ecology and Ecophysiology Group, Department of Biology, University of Antwerp, 2610 Antwerp, Belgium
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6
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Stryjek R, Modlinska K. Pre-exposure via wire-mesh partition reduces intraspecific aggression in male, wild-type Norway rats. Anim Welf 2022. [DOI: 10.7120/09627286.31.2.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
There are instances when animals are introduced and expected to live alongside unfamiliar conspecifics within zoos, laboratories and wildlife sanctuaries. These pairings of unfamiliar animals may result in stress, trauma, or even death, in addition to reduced confidence in data resulting
from these subjects. For species that communicate relatedness, sex, social status, and emotional state through olfactory cues (eg pheromones), one means of counteracting aggression may involve a period of partial separation — where animals are close enough to become acquainted —
while a permeable barrier maintains separation. For our study, we evaluated the use of a novel, autoclavable, wire-mesh partition to separate potential aggressors. We tested different pairs of 24 wild-type male Norway rats (Rattus norvegicus), previously kept in social isolation for
seven days. Each control pair were merged directly into one cage, while pairs from the experimental groups underwent three pre-exposure sessions that lasted two to four days. We used continuous video recordings to assess five common threat displays: lateral threat, keep down, upright posture,
chase, and clinch attack. We used two types of bedding: new (unscented) bedding and recently used bedding that conveyed scents from both merged rats. We found that rats subjected to pre-exposure demonstrated lower aggression levels across three of the five metrics (lateral threats, upright
postures, and keep downs). We conclude that permeable partitions show promise as a humane mechanism to mix new individuals into preexisting colonies. Further research may explore whether partitions could be helpful with other species that communicate social information by pheromones or direct
visual inspection.
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Affiliation(s)
- R Stryjek
- Institute of Psychology, Polish Academy of Sciences, Warsaw, Poland
| | - K Modlinska
- Institute of Psychology, Polish Academy of Sciences, Warsaw, Poland
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7
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Alward BA, Cathers PH, Blakkan DM, Hoadley AP, Fernald RD. A behavioral logic underlying aggression in an African cichlid fish. Ethology 2021. [DOI: 10.1111/eth.13164] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Beau A. Alward
- Department of Psychology University of Houston Houston TX USA
- Department of Biology and Biochemistry University of Houston Houston TX USA
- Department of Biology Stanford University Stanford CA USA
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8
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Seffrin P, Ingulli P. Brains, brawn, and beauty: The complementary roles of intelligence and physical aggression in attracting sexual partners. Aggress Behav 2021; 47:38-49. [PMID: 33118198 DOI: 10.1002/ab.21934] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 08/25/2020] [Accepted: 09/17/2020] [Indexed: 12/21/2022]
Abstract
The current study compared physical aggression to factors affecting socioeconomic status in the accumulation of sex partners over the life course. Our data sample was drawn from the National Longitudinal Study of Adolescent to Adult Health (men, n = 5,636; women, n = 6,787). Participants were examined in terms of the number of lifetime sex partners they reported, nonrelationship partners, cheating or infidelity, and concurrent relationships. Intelligence and physical violence emerged as being especially likely to boost sex partner accumulation for the number of lifetime sex partners and nonrelationship partners in men. Intelligence also interacted positively with men's violence in cross-sectional models but not longitudinally. Women's violence was not significant regardless of the outcome or model specification. Intelligence showed less consistent effects for women's mating indicators compared to men. Analyses controlled for well-known correlates of aggression and sexual behavior and factors associated with beauty, including interviewer reports of survey participants' physical attractiveness and maturity, as well as self-reported attractiveness, maturity, and health. Findings are consistent with evolutionary ideas regarding costly signaling as an effective mating strategy among men.
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Affiliation(s)
- Patrick Seffrin
- Department of Social Sciences Marywood University Scranton Pennsylvania USA
| | - Patricia Ingulli
- Department of Social Sciences Marywood University Scranton Pennsylvania USA
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9
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Abstract
Bacteria have evolved a wide range of mechanisms to harm and kill their competitors, including chemical, mechanical and biological weapons. Here we review the incredible diversity of bacterial weapon systems, which comprise antibiotics, toxic proteins, mechanical weapons that stab and pierce, viruses, and more. The evolution of bacterial weapons is shaped by many factors, including cell density and nutrient abundance, and how strains are arranged in space. Bacteria also employ a diverse range of combat behaviours, including pre-emptive attacks, suicidal attacks, and reciprocation (tit-for-tat). However, why bacteria carry so many weapons, and why they are so often used, remains poorly understood. By comparison with animals, we argue that the way that bacteria live - often in dense and genetically diverse communities - is likely to be key to their aggression as it encourages them to dig in and fight alongside their clonemates. The intensity of bacterial aggression is such that it can strongly affect communities, via complex coevolutionary and eco-evolutionary dynamics, which influence species over space and time. Bacterial warfare is a fascinating topic for ecology and evolution, as well as one of increasing relevance. Understanding how bacteria win wars is important for the goal of manipulating the human microbiome and other important microbial systems.
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10
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Affiliation(s)
- Joachim G. Frommen
- Division of Behavioural Ecology Institute of Ecology and Evolution University of Bern Hinterkappelen Switzerland
- Department of Natural Sciences Manchester Metropolitan University Manchester UK
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11
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Acoustic signalling of aggressive intent in the agonistic encounters of female Asian particoloured bats. Anim Behav 2019. [DOI: 10.1016/j.anbehav.2019.01.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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12
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Camerlink I, Coulange E, Farish M, Baxter EM, Turner SP. Facial expression as a potential measure of both intent and emotion. Sci Rep 2018; 8:17602. [PMID: 30514964 PMCID: PMC6279763 DOI: 10.1038/s41598-018-35905-3] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 11/12/2018] [Indexed: 11/24/2022] Open
Abstract
Facial expressions convey information on emotion, physical sensations, and intent. The much debated theories that facial expressions can be emotions or signals of intent have largely remained separated in animal studies. Here we integrate these approaches with the aim to 1) investigate whether pigs may use facial expressions as a signal of intent and; 2) quantify differences in facial metrics between different contexts of potentially negative emotional state. Facial metrics of 38 pigs were recorded prior to aggression, during aggression and during retreat from being attacked in a dyadic contest. Ear angle, snout ratio (length/height) and eye ratio from 572 images were measured. Prior to the occurrence of aggression, eventual initiators of the first bite had a smaller snout ratio and eventual winners showed a non-significant tendency to have their ears forward more than eventual losers. During aggression, pigs' ears were more forward orientated and their snout ratio was smaller. During retreat, pigs' ears were backwards and their eyes open less. The results suggest that facial expressions can communicate aggressive intent related to fight success, and that facial metrics can convey information about emotional responses to contexts involving aggression and fear.
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Affiliation(s)
- Irene Camerlink
- Animal Behaviour & Welfare, Animal and Veterinary Sciences Research Group, Scotland's Rural College (SRUC), West Mains Road, Edinburgh, EH9 3JG, UK.
- Institute of Animal Husbandry and Animal Welfare, Department of Farm Animals and Veterinary Public Health, University for Veterinary Medicine Vienna, Veterinärplatz 1, 1210, Vienna, Austria.
| | - Estelle Coulange
- Animal Behaviour & Welfare, Animal and Veterinary Sciences Research Group, Scotland's Rural College (SRUC), West Mains Road, Edinburgh, EH9 3JG, UK
| | - Marianne Farish
- Animal Behaviour & Welfare, Animal and Veterinary Sciences Research Group, Scotland's Rural College (SRUC), West Mains Road, Edinburgh, EH9 3JG, UK
| | - Emma M Baxter
- Animal Behaviour & Welfare, Animal and Veterinary Sciences Research Group, Scotland's Rural College (SRUC), West Mains Road, Edinburgh, EH9 3JG, UK
| | - Simon P Turner
- Animal Behaviour & Welfare, Animal and Veterinary Sciences Research Group, Scotland's Rural College (SRUC), West Mains Road, Edinburgh, EH9 3JG, UK
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13
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O’Brien CE, Roumbedakis K, Winkelmann IE. The Current State of Cephalopod Science and Perspectives on the Most Critical Challenges Ahead From Three Early-Career Researchers. Front Physiol 2018; 9:700. [PMID: 29962956 PMCID: PMC6014164 DOI: 10.3389/fphys.2018.00700] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 05/18/2018] [Indexed: 12/14/2022] Open
Abstract
Here, three researchers who have recently embarked on careers in cephalopod biology discuss the current state of the field and offer their hopes for the future. Seven major topics are explored: genetics, aquaculture, climate change, welfare, behavior, cognition, and neurobiology. Recent developments in each of these fields are reviewed and the potential of emerging technologies to address specific gaps in knowledge about cephalopods are discussed. Throughout, the authors highlight specific challenges that merit particular focus in the near-term. This review and prospectus is also intended to suggest some concrete near-term goals to cephalopod researchers and inspire those working outside the field to consider the revelatory potential of these remarkable creatures.
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Affiliation(s)
- Caitlin E. O’Brien
- Normandie Univ., UNICAEN, Rennes 1 Univ., UR1, CNRS, UMR 6552 ETHOS, Caen, France
- Association for Cephalopod Research – CephRes, Naples, Italy
| | - Katina Roumbedakis
- Association for Cephalopod Research – CephRes, Naples, Italy
- Dipartimento di Scienze e Tecnologie, Università degli Studi del Sannio, Benevento, Italy
| | - Inger E. Winkelmann
- Section for Evolutionary Genomics, Natural History Museum of Denmark, University of Copenhagen, Copenhagen, Denmark
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14
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Jakubowska A, Osiejuk TS. Soft songs in male ortolan buntings are used in an aggressive context but are not an aggressive signal. Ethology 2018. [DOI: 10.1111/eth.12758] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Aleksandra Jakubowska
- Department of Behavioural Ecology; Faculty of Biology; Institute of Environmental Sciences; Adam Mickiewicz University; Poznań Poland
| | - Tomasz S. Osiejuk
- Department of Behavioural Ecology; Faculty of Biology; Institute of Environmental Sciences; Adam Mickiewicz University; Poznań Poland
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15
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The function of ultrasonic vocalizations during territorial defence by pair-bonded male and female California mice. Anim Behav 2018. [DOI: 10.1016/j.anbehav.2017.11.008] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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16
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Goll Y, Demartsev V, Koren L, Geffen E. Male hyraxes increase countersinging as strangers become ‘nasty neighbours’. Anim Behav 2017. [DOI: 10.1016/j.anbehav.2017.10.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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Chapin KJ, Reed-Guy S. Territoriality mediates atypical size-symmetric cannibalism in the AmblypygiPhrynus longipes. Ethology 2017. [DOI: 10.1111/eth.12647] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kenneth J. Chapin
- Department of Ecology and Evolutionary Biology; University of California; Los Angeles CA USA
- Department of Neurobiology; Physiology, and Behavior; University of California, Davis; Davis CA USA
| | - Sarah Reed-Guy
- Department of Ecology and Evolutionary Biology; University of California; Los Angeles CA USA
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18
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Allen JJ, Akkaynak D, Schnell AK, Hanlon RT. Dramatic Fighting by Male Cuttlefish for a Female Mate. Am Nat 2017; 190:144-151. [PMID: 28617634 DOI: 10.1086/692009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Male cuttlefish compete for females with a repertoire of visually dramatic behaviors. Laboratory experiments have explored this system in Sepia officinalis, but corroborative field data have eluded collection attempts by many researchers. While scuba diving in Turkey, we fortuitously filmed an intense sequence of consort/intruder behaviors in which the consort lost and then regained his female mate from the intruder. These agonistic bouts escalated in stages, leading to fast dramatic expression of the elaborate intense zebra display and culminating in biting and inking as the intruder male attempted a forced copulation of the female. When analyzed in the context of game theory, the patterns of fighting behavior were more consistent with mutual assessment than self-assessment of fighting ability. Additional observations of these behaviors in nature are needed to conclusively determine which models best represent conflict resolution, but our field observations agree with laboratory findings and provide a valuable perspective.
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19
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Studies into abnormal aggression in humans and rodents: Methodological and translational aspects. Neurosci Biobehav Rev 2017; 76:77-86. [DOI: 10.1016/j.neubiorev.2017.02.022] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 01/25/2017] [Accepted: 02/13/2017] [Indexed: 02/06/2023]
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20
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Bayani DM, Taborsky M, Frommen JG. To pee or not to pee: urine signals mediate aggressive interactions in the cooperatively breeding cichlid Neolamprologus pulcher. Behav Ecol Sociobiol 2017. [DOI: 10.1007/s00265-016-2260-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Green PA, Patek SN. Contests with deadly weapons: telson sparring in mantis shrimp (Stomatopoda). Biol Lett 2016; 11:20150558. [PMID: 26399976 DOI: 10.1098/rsbl.2015.0558] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Mantis shrimp strike with extreme impact forces that are deadly to prey. They also strike conspecifics during territorial contests, yet theoretical and empirical findings in aggressive behaviour research suggest competitors should resolve conflicts using signals before escalating to dangerous combat. We tested how Neogonodactylus bredini uses two ritualized behaviours to resolve size-matched contests: meral spread visual displays and telson (tailplate) strikes. We predicted that (i) most contests would be resolved by meral spreads, (ii) meral spreads would reliably signal strike force and (iii) strike force would predict contest success. The results were unexpected for each prediction. Contests were not resolved by meral spreads, instead escalating to striking in 33 of 34 experiments. The size of meral spread components did not strongly correlate with strike force. Strike force did not predict contest success; instead, winners delivered more strikes. Size-matched N. bredini avoid deadly combat not by visual displays, but by ritualistically and repeatedly striking each other's telsons until the loser retreats. We term this behaviour 'telson sparring', analogous to sparring in other weapon systems. We present an alternative framework for mantis shrimp contests in which the fight itself is the signal, serving as a non-lethal indicator of aggressive persistence or endurance.
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22
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Keesom SM, Hurley LM. Socially induced serotonergic fluctuations in the male auditory midbrain correlate with female behavior during courtship. J Neurophysiol 2016; 115:1786-96. [PMID: 26792882 PMCID: PMC4869479 DOI: 10.1152/jn.00742.2015] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 01/16/2016] [Indexed: 11/22/2022] Open
Abstract
Cues from social partners trigger the activation of socially responsive neuromodulatory systems, priming brain regions including sensory systems to process these cues appropriately. The fidelity with which neuromodulators reflect the qualities of ongoing social interactions in sensory regions is unclear. We addressed this issue by using voltammetry to monitor serotonergic fluctuations in an auditory midbrain nucleus, the inferior colliculus (IC), of male mice (Mus musculus) paired with females, and by concurrently measuring behaviors of both social partners. Serotonergic activity strongly increased in male mice as they courted females, relative to serotonergic activity in the same males during trials with no social partners. Across individual males, average changes in serotonergic activity were negatively correlated with behaviors exhibited by female partners, including broadband squeaks, which relate to rejection of males. In contrast, serotonergic activity did not correlate with male behaviors, including ultrasonic vocalizations. These findings suggest that during courtship, the level of serotonergic activity in the IC of males reflects the valence of the social interaction from the perspective of the male (i.e., whether the female rejects the male or not). As a result, our findings are consistent with the hypothesis that neuromodulatory effects on neural responses in the IC may reflect the reception, rather than the production, of vocal signals.
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Affiliation(s)
- Sarah M Keesom
- Department of Biology, Indiana University, Bloomington, Indiana; Center for the Integrative Study of Animal Behavior, Indiana University, Bloomington, Indiana; and
| | - Laura M Hurley
- Department of Biology, Indiana University, Bloomington, Indiana; Center for the Integrative Study of Animal Behavior, Indiana University, Bloomington, Indiana; and Program in Neuroscience, Indiana University, Bloomington, Indiana
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Padurariu M, Prepelita R, Ciobica A, Dobrin R, Timofte D, Stefanescu C, Chirita R. Short Review on the Aggressive Behaviour: Genetical, Biological Aspects and Oxytocin Relevance. INTERNATIONAL LETTERS OF NATURAL SCIENCES 2016. [DOI: 10.56431/p-iavles] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
In this mini-review we were interested in describing the main genetic, biological and mechanistic aspects of the aggressive behaviour in human patients and animal models. It seems that violent behaviour and impulsive traits present a multifactorial substrate, which is determined by genetic and non-genetic factors. Thus, aggressivity is regulated by brain regions such as the amygdala, which controls neural circuits for triggering defensive, aggressive or avoidant behaviour. Moreover, other brain structures such as the anterior cingulate cortex and prefrontal cortex regions could modulate circuits involved in aggression. Regarding the genetic aspects, we could mention the mutations in the monoamine oxidase or the polymorphisms of the genes involved in the metabolism of serotonin, such as tryptophan hydroxylase. Also, besides the low levels of serotonin metabolites, which seem to be associated with impulsive and aggressive traits, there are good evidences that deficiencies in glutamate transmission, as well as testosterone, vasopressin, hypochloesterolemia or oxytocin modifications could be related to the aggressive behaviour. Regarding oxytocin we present here in the last chapter the controversial results from the current literature regarding the various effects exhibited by oxytocin administration on the aggressive behavior, considering the increased interest in understanding the role of oxytocin on the main neuropsychiatric disorders.
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Affiliation(s)
| | | | | | - Romeo Dobrin
- "Gr. T. Popa” University of Medicine and Pharmacy
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Padurariu M, Prepelita R, Ciobica A, Dobrin R, Timofte D, Stefanescu C, Chirita R. Short Review on the Aggressive Behaviour: Genetical, Biological Aspects and Oxytocin Relevance. INTERNATIONAL LETTERS OF NATURAL SCIENCES 2016. [DOI: 10.18052/www.scipress.com/ilns.52.43] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
In this mini-review we were interested in describing the main genetic, biological and mechanistic aspects of the aggressive behaviour in human patients and animal models. It seems that violent behaviour and impulsive traits present a multifactorial substrate, which is determined by genetic and non-genetic factors. Thus, aggressivity is regulated by brain regions such as the amygdala, which controls neural circuits for triggering defensive, aggressive or avoidant behaviour. Moreover, other brain structures such as the anterior cingulate cortex and prefrontal cortex regions could modulate circuits involved in aggression. Regarding the genetic aspects, we could mention the mutations in the monoamine oxidase or the polymorphisms of the genes involved in the metabolism of serotonin, such as tryptophan hydroxylase. Also, besides the low levels of serotonin metabolites, which seem to be associated with impulsive and aggressive traits, there are good evidences that deficiencies in glutamate transmission, as well as testosterone, vasopressin, hypochloesterolemia or oxytocin modifications could be related to the aggressive behaviour. Regarding oxytocin we present here in the last chapter the controversial results from the current literature regarding the various effects exhibited by oxytocin administration on the aggressive behavior, considering the increased interest in understanding the role of oxytocin on the main neuropsychiatric disorders.
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Affiliation(s)
| | | | | | - Romeo Dobrin
- "Gr. T. Popa” University of Medicine and Pharmacy
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25
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Signal Use by Octopuses in Agonistic Interactions. Curr Biol 2016; 26:377-82. [DOI: 10.1016/j.cub.2015.12.033] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 11/11/2015] [Accepted: 12/10/2015] [Indexed: 11/21/2022]
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26
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Reichert MS. Playback tests and studies of animal contest dynamics: concepts and an example in the gray tree frog. Behav Ecol 2014. [DOI: 10.1093/beheco/aru030] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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27
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Marsh AA, Cardinale EM, Chentsova-Dutton YE, Grossman MR, Krumpos KA. Power Plays. SOCIAL PSYCHOLOGICAL AND PERSONALITY SCIENCE 2014. [DOI: 10.1177/1948550613519684] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Both transient and stable facial cues have evolved as essential features of social communication in humans. Accumulating research links actual and perceived aggression to a higher ratio between the height and bizygomatic width of a person’s face (facial width-to-height ratio [WHR]) and shows that digitally increasing this ratio can alter apparent aggressiveness. We present evidence that facial behaviors associated with anger—the state most closely associated with aggressive intentions—also increase facial WHR, mimicking the facial morphology of aggressive individuals. In Study 1, individuals induced to appear aggressive naturally increased their facial WHR using anger-related facial behaviors. In Study 2, we found that validated anger expressions increased facial WHR and that this change predicts increased attributions of aggressiveness. We also found statistical suggestions that anger-related facial behaviors may serve as cues that overrepresent the expresser’s aggressiveness. Our findings suggest that facial behaviors associated with anger may have emerged to facilitate aggressive encounters.
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Affiliation(s)
- Abigail A. Marsh
- Department of Psychology, Georgetown University, Washington, DC, USA
| | | | | | - Molli R. Grossman
- Department of Psychology, Georgetown University, Washington, DC, USA
| | - Kalli A. Krumpos
- Department of Psychology, Georgetown University, Washington, DC, USA
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28
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Stockley P, Bottell L, Hurst JL. Wake up and smell the conflict: odour signals in female competition. Philos Trans R Soc Lond B Biol Sci 2013; 368:20130082. [PMID: 24167312 PMCID: PMC3826211 DOI: 10.1098/rstb.2013.0082] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Odour signals used in competitive and aggressive interactions between males are well studied in the context of sexual selection. By contrast, relatively little is known about comparable signals used by females, despite current interest in the evolution of female ornaments and weaponry. Available evidence suggests that odour signals are important in competitive interactions between female mammals, with reductions or reversals of male-biased sexual dimorphism in signalling where female competition is intense. Scent marking is often associated with conflict between females over access to resources or reproductive opportunities. Female scent marks may therefore provide reliable signals of competitive ability that could be used both by competitors and potential mates. Consistent with this hypothesis, we report that aggressive behaviour of female house mice is correlated with the amount of major urinary protein (MUP) excreted in their urine, a polymorphic set of proteins that are used in scent mark signalling. Under semi-natural conditions, females with high MUP output are more likely to produce offspring sired by males that have high reproductive success, and less likely to produce offspring by multiple different sires, suggesting that females with strong MUP signals are monopolized by males of particularly high quality. We conclude that odour signals are worthy of more detailed investigation as mediators of female competition.
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Affiliation(s)
- Paula Stockley
- Mammalian Behaviour and Evolution Group, Institute of Integrative Biology, University of Liverpool, Leahurst Campus, Chester High Road, Neston CH64 7TE, UK
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Geberzahn N, Aubin T. How a songbird with a continuous singing style modulates its song when territorially challenged. Behav Ecol Sociobiol 2013; 68:1-12. [PMID: 24436508 PMCID: PMC3889651 DOI: 10.1007/s00265-013-1616-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Revised: 07/26/2013] [Accepted: 07/30/2013] [Indexed: 10/27/2022]
Abstract
In songbirds of the temperate zone, often only males sing and their songs serve to attract females and to deter territorial rivals. In many species, males vary certain aspects of their singing behavior when engaged in territorial interactions. Such variation may be an honest signal of the traits of the signaler, such as fighting strength, condition, or aggressive motivation, and may be used by receivers in decisions on whether to retreat or to escalate a fight. This has been studied intensively in species that sing discontinuously, in which songs are alternating with silent pauses. We studied contextual variation in the song of skylarks (Alauda arvensis), a songbird with a large vocal repertoire and a continuous and versatile singing style. We exposed subjects to simulated territorial intrusions by broadcasting conspecific song and recorded their vocal responses. We found that males sing differently if they are singing spontaneously with no other conspecific around than if they are territorially challenged. In this last case, males produced lower-frequency syllables. Furthermore, they increased the sound density of their song: they increased the proportion of sound within song. They seem to do so by singing different elements of their repertoire when singing reactively. Furthermore, they increased the consistency of mean peak frequency: they repeated syllable types with less variability when singing reactively. Such contextual variation suggests that skylarks might use low frequencies, sound density, and song consistency to indicate their competitive potential, and thus, those song features might be important for mutual assessment of competitive abilities.
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Affiliation(s)
- Nicole Geberzahn
- Centre National de la Recherche Scientifique, Centre de Neuroscience Paris-Sud, Université Paris-Sud, UMR 8195, 91405 Orsay, France
- Equipe Communications Acoustiques, Université Paris-Sud, CNRS, Centre de Neuroscience Paris-Sud, UMR 8195, Bat. 446, Univ. Paris XI, 91405 Orsay Cedex, France
| | - Thierry Aubin
- Centre National de la Recherche Scientifique, Centre de Neuroscience Paris-Sud, Université Paris-Sud, UMR 8195, 91405 Orsay, France
- Equipe Communications Acoustiques, Université Paris-Sud, CNRS, Centre de Neuroscience Paris-Sud, UMR 8195, Bat. 446, Univ. Paris XI, 91405 Orsay Cedex, France
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30
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Swierk L, Langkilde T. Sizing-up the Competition: Factors Modulating Male Display Behavior During Mate Competition. Ethology 2013. [DOI: 10.1111/eth.12139] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lindsey Swierk
- Department of Biology; Intercollege Graduate Program in Ecology and Center for Brain, Behavior and Cognition; The Pennsylvania State University; University Park; PA; USA
| | - Tracy Langkilde
- Department of Biology; Intercollege Graduate Program in Ecology and Center for Brain, Behavior and Cognition; The Pennsylvania State University; University Park; PA; USA
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