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Ohga H, Shibata K, Sakanoue R, Ogawa T, Kitano H, Kai S, Ohta K, Nagano N, Nagasako T, Uchida S, Sakuma T, Yamamoto T, Kim S, Tashiro K, Kuhara S, Gen K, Fujiwara A, Kazeto Y, Kobayashi T, Matsuyama M. Development of a chub mackerel with less-aggressive fry stage by genome editing of arginine vasotocin receptor V1a2. Sci Rep 2023; 13:3190. [PMID: 36823281 PMCID: PMC9950132 DOI: 10.1038/s41598-023-30259-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 02/20/2023] [Indexed: 02/25/2023] Open
Abstract
Genome editing is a technology that can remarkably accelerate crop and animal breeding via artificial induction of desired traits with high accuracy. This study aimed to develop a chub mackerel variety with reduced aggression using an experimental system that enables efficient egg collection and genome editing. Sexual maturation and control of spawning season and time were technologically facilitated by controlling the photoperiod and water temperature of the rearing tank. In addition, appropriate low-temperature treatment conditions for delaying cleavage, shape of the glass capillary, and injection site were examined in detail in order to develop an efficient and robust microinjection system for the study. An arginine vasotocin receptor V1a2 (V1a2) knockout (KO) strain of chub mackerel was developed in order to reduce the frequency of cannibalistic behavior at the fry stage. Video data analysis using bioimage informatics quantified the frequency of aggressive behavior, indicating a significant 46% reduction (P = 0.0229) in the frequency of cannibalistic behavior than in wild type. Furthermore, in the V1a2 KO strain, the frequency of collisions with the wall and oxygen consumption also decreased. Overall, the manageable and calm phenotype reported here can potentially contribute to the development of a stable and sustainable marine product.
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Affiliation(s)
- Hirofumi Ohga
- grid.177174.30000 0001 2242 4849Aqua-Bioresource Innovation Center (ABRIC) Karatsu Satellite, Faculty of Agriculture, Kyushu University, Saga, 847-0132 Japan
| | - Koki Shibata
- grid.177174.30000 0001 2242 4849Laboratory of Marine Biology, Faculty of Agriculture, Kyushu University, Fukuoka, 819-0395 Japan
| | - Ryo Sakanoue
- grid.177174.30000 0001 2242 4849Laboratory of Marine Biology, Faculty of Agriculture, Kyushu University, Fukuoka, 819-0395 Japan
| | - Takuma Ogawa
- grid.177174.30000 0001 2242 4849Laboratory of Marine Biology, Faculty of Agriculture, Kyushu University, Fukuoka, 819-0395 Japan
| | - Hajime Kitano
- grid.410851.90000 0004 1764 1824Fishery Third Group, Marine Fisheries Research and Development Center, Japan Fisheries Research and Education Agency (FRA), Kanagawa, 221-8529 Japan
| | - Satoshi Kai
- grid.177174.30000 0001 2242 4849Laboratory of Marine Biology, Faculty of Agriculture, Kyushu University, Fukuoka, 819-0395 Japan
| | - Kohei Ohta
- grid.177174.30000 0001 2242 4849Laboratory of Marine Biology, Faculty of Agriculture, Kyushu University, Fukuoka, 819-0395 Japan
| | - Naoki Nagano
- grid.410849.00000 0001 0657 3887Laboratory of Aquaculture, Faculty of Agriculture, University of Miyazaki, Miyazaki, 889-2192 Japan
| | - Tomoya Nagasako
- grid.177174.30000 0001 2242 4849Human Interface Laboratory, Factory of Information Science and Electrical Engineering, Kyushu University, Fukuoka, 819-0395 Japan
| | - Seiichi Uchida
- grid.177174.30000 0001 2242 4849Human Interface Laboratory, Factory of Information Science and Electrical Engineering, Kyushu University, Fukuoka, 819-0395 Japan
| | - Tetsushi Sakuma
- grid.257022.00000 0000 8711 3200Molecular Genetics Laboratory, Graduate School of Integrated Sciences for Life, Hiroshima University, Hiroshima, 739-8526 Japan
| | - Takashi Yamamoto
- grid.257022.00000 0000 8711 3200Molecular Genetics Laboratory, Graduate School of Integrated Sciences for Life, Hiroshima University, Hiroshima, 739-8526 Japan
| | - Sangwan Kim
- grid.177174.30000 0001 2242 4849Laboratory of Molecular Gene Technics, Faculty of Agriculture, Kyushu University, Fukuoka, 812-8581 Japan
| | - Kosuke Tashiro
- grid.177174.30000 0001 2242 4849Laboratory of Molecular Gene Technics, Faculty of Agriculture, Kyushu University, Fukuoka, 812-8581 Japan
| | - Satoru Kuhara
- grid.177174.30000 0001 2242 4849Laboratory of Molecular Gene Technics, Faculty of Agriculture, Kyushu University, Fukuoka, 812-8581 Japan
| | - Koichiro Gen
- Planning and Coordination Department, Fisheries Technology Institute, FRA, Nagasaki, 851-2213 Japan
| | - Atushi Fujiwara
- grid.410851.90000 0004 1764 1824Aquatic Breeding Division, Aquaculture Research Department, Fisheries Technology Institute, FRA, Mie, 516-0193 Japan
| | - Yukinori Kazeto
- Fisheries Technology Institute, Minamiizu Field Station, FRA, Shizuoka, 415-0156 Japan
| | - Takanori Kobayashi
- grid.410851.90000 0004 1764 1824Aquatic Breeding Division, Aquaculture Research Department, Fisheries Technology Institute, FRA, Kanagawa, 236-8648 Japan
| | - Michiya Matsuyama
- ABRIC, Faculty of Agriculture, Kyushu University, Fukuoka, 819-0395, Japan.
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Katayama Y, Tsukada T, Hyodo S, Sakamoto H, Sakamoto T. Behavioural osmoregulation during land invasion in fish: Prandial drinking and wetting of the dry skin. PLoS One 2022; 17:e0277968. [PMID: 36477197 PMCID: PMC9728915 DOI: 10.1371/journal.pone.0277968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 11/08/2022] [Indexed: 12/12/2022] Open
Abstract
Osmoregulatory behaviours should have evolutionarily modified for terrestrialisation of vertebrates. In mammals, sensations of buccal food and drying have immediate effects on postprandial thirst to prevent future systemic dehydration, and is thereby considered to be 'anticipatory thirst'. However, it remains unclear whether such an anticipatory response has been acquired in the non-tetrapod lineage. Using the mudskipper goby (Periophthalmus modestus) as a semi-terrestrial ray-finned fish, we herein investigated postprandial drinking and other unique features like full-body 'rolling' over on the back although these behaviours had not been considered to have osmoregulatory functions. In our observations on tidal flats, mudskippers migrated into water areas within a minute after terrestrial eating, and exhibited rolling behaviour with accompanying pectoral-fin movements. In aquarium experiments, frequency of migration into a water area for drinking increased within a few minutes after eating onset, without systemic dehydration. During their low humidity exposure, frequency of the rolling behaviour and pectoral-fin movements increased by more than five times to moisten the skin before systemic dehydration. These findings suggest anticipatory responses which arise from oral/gastrointestinal and cutaneous sensation in the goby. These sensation and motivation seem to have evolved in distantly related species in order to solve osmoregulatory challenges during terrestrialisation.
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Affiliation(s)
- Yukitoshi Katayama
- Ushimado Marine Institute, Faculty of Science, Okayama University, Setouchi, Okayama, Japan
- Department of Biomolecular Science, Toho University, Funabashi, Chiba, Japan
- Laboratory of Physiology, Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, Chiba, Japan
- * E-mail:
| | - Takehiro Tsukada
- Department of Biomolecular Science, Toho University, Funabashi, Chiba, Japan
| | - Susumu Hyodo
- Laboratory of Physiology, Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, Chiba, Japan
| | - Hirotaka Sakamoto
- Ushimado Marine Institute, Faculty of Science, Okayama University, Setouchi, Okayama, Japan
| | - Tatsuya Sakamoto
- Ushimado Marine Institute, Faculty of Science, Okayama University, Setouchi, Okayama, Japan
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Zhang H, Liu Y, Qin G, Lin Q. Identification of neurohypophysial hormones and the role of VT in the parturition of pregnant seahorses ( Hippocampus erectus). Front Endocrinol (Lausanne) 2022; 13:923234. [PMID: 35966100 PMCID: PMC9372264 DOI: 10.3389/fendo.2022.923234] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Accepted: 07/06/2022] [Indexed: 11/26/2022] Open
Abstract
Neurohypophysial hormones regulate the reproductive behavior of teleosts; however, their role in the gestation and parturition of ovoviviparous fishes with male pregnancy (syngnathids) remains to be demonstrated. In the present study, the complementary DNA (cDNA) sequences of arginine vasotocin (VT) and isotocin (IT) from the lined seahorse (Hippocampus erectus) were cloned and identified. We observed that the mature core peptides of seahorse VT and IT were conserved among teleosts. In the phylogenic tree, seahorse VT and IT were clustered independently with teleost VT and IT. The tissue distribution patterns of VT and IT were similar, and both were highly expressed in the brain, gills, and gonads. Interestingly, they were also expressed to some extent in the brood pouch. In situ hybridization revealed that VT and IT messenger RNA (mRNA) signals in the brain were mainly located in the preoptic area region of the hypothalamus. Intraperitoneal administration of the VT core peptide to pregnant seahorses induced premature parturition, stimulated gonadotropin release, increased serum estrogen levels, and decreased prolactin secretion. Moreover, VT injection upregulated the mRNA expression of the membrane estrogen receptor in the brood pouch. In summary, neurohypophysial hormones promote premature parturition by regulating estrogen synthesis through the hypothalamus-pituitary-gonad axis.
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Affiliation(s)
- Huixian Zhang
- Chinese Academy of Science (CAS) Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yali Liu
- Chinese Academy of Science (CAS) Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
| | - Geng Qin
- Chinese Academy of Science (CAS) Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
| | - Qiang Lin
- Chinese Academy of Science (CAS) Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
- University of Chinese Academy of Sciences, Beijing, China
- *Correspondence: Qiang Lin,
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Hormonal regulation of thirst in the amphibious ray-finned fish suggests the requirement for terrestrialization during evolution. Sci Rep 2019; 9:16347. [PMID: 31705012 PMCID: PMC6841719 DOI: 10.1038/s41598-019-52870-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 10/07/2019] [Indexed: 11/27/2022] Open
Abstract
Thirst has evolved for vertebrate terrestrial adaptation. We previously showed that buccal drying induced a series of drinking behaviours (migration to water–taking water into the mouth–swallowing) in the amphibious mudskipper goby, thereby discovering thirst in ray-finned fish. However, roles of dipsogenic/antidipsogenic hormones, which act on the thirst center in terrestrial tetrapods, have remained unclear in the mudskipper thirst. Here we examined the hormonal effects on the mudskipper drinking behaviours, particularly the antagonistic interaction between angiotensin II (AngII) and atrial natriuretic peptide (ANP) which is important for thirst regulation in mammalian ‘forebrain’. Expectedly, intracerebroventricular injection of ANP in mudskippers reduced AngII-increased drinking rate. ANP also suppressed the neural activity at the ‘hindbrain’ region for the swallowing reflex, and the maintenance of buccopharyngeal water due to the swallowing inhibition may attenuate the motivation to move to water. Thus, the hormonal molecules involved in drinking regulation, as well as the influence of buccopharyngeal water, appear to be conserved in distantly related species to solve osmoregulatory problems, whereas hormonal control of thirst at the forebrain might have been acquired only in tetrapod lineage during evolution.
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Katayama Y, Sakamoto T, Takanami K, Takei Y. The Amphibious Mudskipper: A Unique Model Bridging the Gap of Central Actions of Osmoregulatory Hormones Between Terrestrial and Aquatic Vertebrates. Front Physiol 2018; 9:1112. [PMID: 30154735 PMCID: PMC6102947 DOI: 10.3389/fphys.2018.01112] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Accepted: 07/25/2018] [Indexed: 12/15/2022] Open
Abstract
Body fluid regulation, or osmoregulation, continues to be a major topic in comparative physiology, and teleost fishes have been the subject of intensive research. Great progress has been made in understanding the osmoregulatory mechanisms including drinking behavior in teleosts and mammals. Mudskipper gobies can bridge the gap from aquatic to terrestrial habitats by their amphibious behavior, but the studies are yet emerging. In this review, we introduce this unique teleost as a model to study osmoregulatory behaviors, particularly amphibious behaviors regulated by the central action of hormones. Regarding drinking behavior of mammals, a thirst sensation is aroused by angiotensin II (Ang II) through direct actions on the forebrain circumventricular structures, which predominantly motivates them to search for water and take it into the mouth for drinking. By contrast, aquatic teleosts can drink water that is constantly present in their mouth only by reflex swallowing, and Ang II induces swallowing by acting on the hindbrain circumventricular organ without inducing thirst. In mudskippers, however, through the loss of buccal water by swallowing, which appears to induce buccal drying on land, Ang II motivates these fishes to move to water for drinking. Thus, mudskippers revealed a unique thirst regulation by sensory detection in the buccal cavity. In addition, the neurohypophysial hormones, isotocin (IT) and vasotocin (VT), promote migration to water via IT receptors in mudskippers. VT is also dipsogenic and the neurons in the forebrain may mediate their thirst. VT regulates social behaviors as well as osmoregulation. The VT-induced migration appears to be a submissive response of subordinate mudskippers to escape from competitive and dehydrating land. Together with implications of VT in aggression, mudskippers may bridge the multiple functions of neurohypophysial hormones. Interestingly, cortisol, an important hormone for seawater adaptation and stress response in teleosts, also stimulates the migration toward water, mediated possibly via the mineralocorticoid receptor. The corticosteroid system that is responsive to external stressors can accelerate emergence of migration to alternative habitats. In this review, we suggest this unique teleost as an important model to deepen insights into the behavioral roles of these hormones in relation to osmoregulation.
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Affiliation(s)
- Yukitoshi Katayama
- Physiology Section, Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan
| | - Tatsuya Sakamoto
- Ushimado Marine Institute, Faculty of Science, Okayama University, Setouchi, Japan
| | - Keiko Takanami
- Ushimado Marine Institute, Faculty of Science, Okayama University, Setouchi, Japan
- Mouse Genomics Resource Laboratory, National Institute of Genetics, Mishima, Japan
| | - Yoshio Takei
- Physiology Section, Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan
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Drinking by amphibious fish: convergent evolution of thirst mechanisms during vertebrate terrestrialization. Sci Rep 2018; 8:625. [PMID: 29330516 PMCID: PMC5766589 DOI: 10.1038/s41598-017-18611-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 12/12/2017] [Indexed: 12/11/2022] Open
Abstract
Thirst aroused in the forebrain by angiotensin II (AngII) or buccal drying motivates terrestrial vertebrates to search for water, whereas aquatic fish can drink surrounding water only by reflex swallowing generated in the hindbrain. Indeed, AngII induces drinking through the hindbrain even after removal of the whole forebrain in aquatic fish. Here we show that AngII induces thirst also in the amphibious mudskipper goby without direct action on the forebrain, but through buccal drying. Intracerebroventricular injection of AngII motivated mudskippers to move into water and drink as with tetrapods. However, AngII primarily increased immunoreactive c-Fos at the hindbrain swallowing center where AngII receptors were expressed, as in other ray-finned fish, and such direct action on the forebrain was not found. Behavioural analyses showed that loss of buccal water on land by AngII-induced swallowing, by piercing holes in the opercula, or by water-absorptive gel placed in the cavity motivated mudskippers to move to water for refilling. Since sensory detection of water at the bucco-pharyngeal cavity like 'dry mouth' has recently been noted to regulate thirst in mammals, similar mechanisms seem to have evolved in distantly related species in order to solve osmoregulatory problems during terrestrialization.
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Cabrera-Álvarez MJ, Swaney WT, Reader SM. Forebrain activation during social exposure in wild-type guppies. Physiol Behav 2017; 182:107-113. [DOI: 10.1016/j.physbeh.2017.10.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 09/28/2017] [Accepted: 10/11/2017] [Indexed: 12/26/2022]
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Balshine S, Wong MY, Reddon AR. Social motivation and conflict resolution tactics as potential building blocks of sociality in cichlid fishes. Behav Processes 2017; 141:152-160. [DOI: 10.1016/j.beproc.2017.01.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Revised: 12/21/2016] [Accepted: 01/02/2017] [Indexed: 11/16/2022]
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Reddon AR, O'Connor CM, Nesjan E, Cameron J, Hellmann JK, Ligocki IY, Marsh-Rollo SE, Hamilton IM, Wylie DR, Hurd PL, Balshine S. Isotocin neuronal phenotypes differ among social systems in cichlid fishes. ROYAL SOCIETY OPEN SCIENCE 2017; 4:170350. [PMID: 28573041 PMCID: PMC5451842 DOI: 10.1098/rsos.170350] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 04/20/2017] [Indexed: 06/07/2023]
Abstract
Social living has evolved numerous times across a diverse array of animal taxa. An open question is how the transition to a social lifestyle has shaped, and been shaped by, the underlying neurohormonal machinery of social behaviour. The nonapeptide neurohormones, implicated in the regulation of social behaviours, are prime candidates for the neuroendocrine substrates of social evolution. Here, we examined the brains of eight cichlid fish species with divergent social systems, comparing the number and size of preoptic neurons that express the nonapeptides isotocin and vasotocin. While controlling for the influence of phylogeny and body size, we found that the highly social cooperatively breeding species (n = 4) had fewer parvocellular isotocin neurons than the less social independently breeding species (n = 4), suggesting that the evolutionary transition to group living and cooperative breeding was associated with a reduction in the number of these neurons. In a complementary analysis, we found that the size and number of isotocin neurons significantly differentiated the cooperatively breeding from the independently breeding species. Our results suggest that isotocin is related to sociality in cichlids and may provide a mechanistic substrate for the evolution of sociality.
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Affiliation(s)
- Adam R. Reddon
- Department of Biology, McGill University, Montreal, Quebec, Canada
- Department of Psychology, Neuroscience and Behaviour, McMaster University, Hamilton, Ontario, Canada
| | - Constance M. O'Connor
- Department of Psychology, Neuroscience and Behaviour, McMaster University, Hamilton, Ontario, Canada
- Wildlife Conservation Society Canada, Thunder Bay, Ontario, Canada
| | - Erin Nesjan
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Jason Cameron
- Department of Psychology, University of Alberta, Edmonton, Alberta, Canada
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Jennifer K. Hellmann
- Department of Evolution, Ecology, and Organismal Biology, The Ohio State University, Columbus, OH, USA
- Department of Animal Biology, University of Illinois, Urbana-Champaign, IL, USA
| | - Isaac Y. Ligocki
- Department of Evolution, Ecology, and Organismal Biology, The Ohio State University, Columbus, OH, USA
- Department of Neurobiology, Physiology and Behavior, University of California Davis, Davis, CA, USA
| | - Susan E. Marsh-Rollo
- Department of Psychology, Neuroscience and Behaviour, McMaster University, Hamilton, Ontario, Canada
| | - Ian M. Hamilton
- Department of Evolution, Ecology, and Organismal Biology, The Ohio State University, Columbus, OH, USA
- Department of Mathematics, The Ohio State University, Columbus, OH, USA
| | - Douglas R. Wylie
- Department of Psychology, University of Alberta, Edmonton, Alberta, Canada
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Peter L. Hurd
- Department of Psychology, University of Alberta, Edmonton, Alberta, Canada
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Sigal Balshine
- Department of Psychology, Neuroscience and Behaviour, McMaster University, Hamilton, Ontario, Canada
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Meylan S, Lallemand F, Haussy C, Bleu J, Miles D. Arginine vasotocin inhibits social interactions and enhances essential activities in male common lizards (Zootoca vivipara). Gen Comp Endocrinol 2017; 243:10-14. [PMID: 27570058 DOI: 10.1016/j.ygcen.2016.08.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 07/18/2016] [Accepted: 08/24/2016] [Indexed: 11/26/2022]
Abstract
Arginine vasotocin (AVT) is known to play an important role in the regulation of social behavior in a number of vertebrate species. Nevertheless, the relationship between AVT and intraspecific interactions appears complex and in some cases contradictory. Moreover, AVT influences other behaviors, which are not primarily social including exploratory behavior, locomotion and thermoregulation. Some of these behavioral effects may be side-effects from a general influence of AVT on physiology. Indeed AVT can regulate metabolism and osmoregulation. Because most studies have been conducted using mammals and birds, its role in modulating behavior in other vertebrate groups is largely unknown. In this study we examined the effect of AVT on the social behavior of male common lizards, Zootoca vivipara. Moreover, considering the variety of pathways AVT could be involved in, we investigated its consequences on thermoregulatory behavior and physiological performance. In mid-June 2010, 74 males were captured from field sites (Mont-Lozère, South-eastern France) and kept in the laboratory for three weeks to obtain behavioral (reaction to conspecific odors, thermoregulation) and physiological (endurance, testosterone level) measurements. We demonstrated that injection of AVT reduced testosterone level and affected social behavior in different ways depending on the size of an individual. Specifically, small males injected with AVT were less attracted by conspecific odors than small control males, and no effect was detected in large males. Moreover, AVT promoted thermoregulatory behavior and enhanced endurance. These results are concordant with previous results obtained in this species in studies on stress suggesting that AVT may act through its influence on corticosterone secretion.
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Affiliation(s)
- Sandrine Meylan
- Institut d'Ecologie et des Sciences de l'Environnement de Paris (iEES Paris) - UPMC-CNRS, Bat. A, 7ème étage, quai Saint Bernard, 75252 Paris Cedex 05, France; ESPE de Paris-Université Paris Sorbonne, 10 rue Molitor, 75016 Paris, France.
| | - Félix Lallemand
- Institut d'Ecologie et des Sciences de l'Environnement de Paris (iEES Paris) - UPMC-CNRS, Bat. A, 7ème étage, quai Saint Bernard, 75252 Paris Cedex 05, France
| | - Claudy Haussy
- Institut d'Ecologie et des Sciences de l'Environnement de Paris (iEES Paris) - UPMC-CNRS, Bat. A, 7ème étage, quai Saint Bernard, 75252 Paris Cedex 05, France
| | - Josefa Bleu
- Institut d'Ecologie et des Sciences de l'Environnement de Paris (iEES Paris) - UPMC-CNRS, Bat. A, 7ème étage, quai Saint Bernard, 75252 Paris Cedex 05, France
| | - Donald Miles
- Department of Biological Sciences, Ohio University, 131 Life Sciences Building, Athens, OH 4570, USA
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Perrone R, Silva A. Vasotocin increases dominance in the weakly electric fish Brachyhypopomus gauderio. ACTA ACUST UNITED AC 2016; 110:119-126. [PMID: 27940222 DOI: 10.1016/j.jphysparis.2016.12.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 11/22/2016] [Accepted: 12/01/2016] [Indexed: 11/26/2022]
Abstract
Animals establish social hierarchies through agonistic behavior. The recognition of the own and others social ranks is crucial for animals that live in groups to avoid costly constant conflicts. Weakly electric fish are valuable model systems for the study of agonistic behavior and its neuromodulation, given that they display conspicuous electrocommunication signals that are generated by a very well-known electromotor circuit. Brachyhypopomus gauderio is a gregarious electric fish, presents a polygynous breeding system, morphological and electrophysiological sexual dimorphism during the breeding season, and displays a typical intrasexual reproduction-related aggression. Dominants signal their social status by increasing their electric organ discharge (EOD) rate after an agonistic encounter (electric dominance). Subordinates only occasionally produce transient electric signals (chirps and offs). The hypothalamic neuropeptide arginine-vasotocin (AVT) and its mammalian homologue, arginine- vasopressin (AVP) are key modulators of social behavior across vertebrates. In this study, we focus on the role of AVT on dominance establishment in Brachyhypopomus gauderio by analyzing the effects of pharmacological manipulations of the AVT system in potential dominants. AVT exerts a very specific direct effect restricted only to EOD rate, and is responsible for the electric dominance. Unexpectedly, AVT did not affect the intensity of aggression in either contender. Nor was the time structure affected by AVT administration. We also present two interesting examples of the interplay between contenders by evaluating how AVT modulations, even when directed to one individual, affect the behavior of the dyad as a unit. First, we found that V1a AVT receptor antagonist Manning Compound (MC) induces a reversion in the positive correlation between dominants' and subordinates' attack rates, observed in both control and AVT treated dyads, suggesting that an endogenous AVT tone modulates aggressive interactions. Second, we confirmed that AVT administered to dominants induces an increase in the submissive transient electric signals in subordinates.
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Affiliation(s)
- Rossana Perrone
- Unidad Bases Neurales de la Conducta, Instituto de Investigaciones Biológicas Clemente Estable, Avenida Italia 3318, CP 11600 Montevideo, Uruguay.
| | - Ana Silva
- Unidad Bases Neurales de la Conducta, Instituto de Investigaciones Biológicas Clemente Estable, Avenida Italia 3318, CP 11600 Montevideo, Uruguay; Laboratorio de Neurociencias, Facultad de Ciencias, Universidad de la República, Iguá 4225, CP 11400 Montevideo, Uruguay.
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Sakamoto T, Nishiyama Y, Ikeda A, Takahashi H, Hyodo S, Kagawa N, Sakamoto H. Neurohypophysial Hormones Regulate Amphibious Behaviour in the Mudskipper Goby. PLoS One 2015; 10:e0134605. [PMID: 26230718 PMCID: PMC4521927 DOI: 10.1371/journal.pone.0134605] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Accepted: 07/12/2015] [Indexed: 12/15/2022] Open
Abstract
The neurohypophysial hormones, arginine vasotocin and isotocin, regulate both hydromineral balance and social behaviors in fish. In the amphibious mudskipper, Periophthalmus modestus, we previously found arginine-vasotocin-specific regulation of aggressive behavior, including migration of the submissive subordinate into water. This migration also implies the need for adaptation to dehydration. Here, we examined the effects of arginine vasotocin and isotocin administration on the amphibious behavior of individual mudskippers in vivo. The mudskippers remained in the water for an increased period of time after 1-8 h of intracerebroventricular (ICV) injection with 500 pg/g arginine vasotocin or isotocin. The 'frequency of migration' was decreased after ICV injection of arginine vasotocin or isotocin, reflecting a tendency to remain in the water. ICV injections of isotocin receptor antagonist with arginine vasotocin or isotocin inhibited all of these hormonal effects. In animals kept out of water, mRNA expression of brain arginine vasotocin and isotocin precursors increased 3- and 1.5-fold, respectively. Given the relatively wide distribution of arginine vasotocin fibres throughout the mudskipper brain, induction of arginine vasotocin and isotocin under terrestrial conditions may be involved also in the preference for an aquatic habitat as ligands for brain isotocin receptors.
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Affiliation(s)
- Tatsuya Sakamoto
- Ushimado Marine Institute, Faculty of Science, Okayama University, Ushimado, Setouchi, 701-4303, Japan
| | - Yudai Nishiyama
- Ushimado Marine Institute, Faculty of Science, Okayama University, Ushimado, Setouchi, 701-4303, Japan
| | - Aoi Ikeda
- Ushimado Marine Institute, Faculty of Science, Okayama University, Ushimado, Setouchi, 701-4303, Japan
| | - Hideya Takahashi
- Ushimado Marine Institute, Faculty of Science, Okayama University, Ushimado, Setouchi, 701-4303, Japan
| | - Susumu Hyodo
- Laboratory of Physiology, Atmosphere and Ocean Research Institute, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8564, Japan
| | - Nao Kagawa
- Department of Life Science, Faculty of Science and Technology, Kinki University, Higashiosaka, Osaka, 577-8502, Japan
| | - Hirotaka Sakamoto
- Ushimado Marine Institute, Faculty of Science, Okayama University, Ushimado, Setouchi, 701-4303, Japan
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