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Iida A, Tsuda N, Yoshida J, Nomura J, Ratanayotha A, Kawai T, Hondo E. Glucose absorption activity and gene expression of sugar transporters in the trophotaenia of the viviparous teleost Xenotoca eiseni. Biochim Biophys Acta Gen Subj 2023; 1867:130464. [PMID: 37717926 DOI: 10.1016/j.bbagen.2023.130464] [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: 07/10/2023] [Revised: 09/07/2023] [Accepted: 09/12/2023] [Indexed: 09/19/2023]
Abstract
In viviparous reproductive systems, nutrient transfer from mother to embryo plays a critical role in the generation of offspring. Herein, we investigated the mother-to-embryo nutrient transfer machinery in the viviparous teleost Xenotoca eiseni, which belongs to the family Goodeidae. The intraovarian embryo absorbs maternal supplements via the hindgut-derived placental structure termed the trophotaenia. Tracer analysis indicated that the trophotaenia can take up glucose analogs in ex vivo cultured embryos. The candidate genes for absorption, sglt1, glut2, atp1a, and atp1b, were determined from published transcriptomes. These genes were expressed in the trophotaenia of X. eiseni embryos. Fluorescent immunohistochemistry of Na+/K+ ATPase indicated the polarity of epithelial cells in the trophotaenia. The presented evidence suggests that the epithelial cell layer transports monosaccharides from the apical membrane of epithelial cells in a basolateral direction. Taken together, this study provides insight into how maternal fish maintain their offspring during gestation and will aid in the development of strategies to improve offspring generation in these fish.
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Affiliation(s)
- Atsuo Iida
- Department of Animal Sciences Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi 464-8602, Japan; Department of Bioresource Sciences, School of Agricultural Sciences, Nagoya University, Nagoya, Aichi 464-8602, Japan.
| | - Natsuho Tsuda
- Department of Bioresource Sciences, School of Agricultural Sciences, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - Junki Yoshida
- Department of Animal Sciences Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - Jumpei Nomura
- Department of Animal Sciences Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - Adisorn Ratanayotha
- Laboratory of Integrative Physiology, Department of Physiology, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan; Department of Anatomy, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkoknoi, Bangkok 10700, Thailand
| | - Takafumi Kawai
- Laboratory of Integrative Physiology, Department of Physiology, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Eiichi Hondo
- Department of Animal Sciences Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi 464-8602, Japan; Department of Bioresource Sciences, School of Agricultural Sciences, Nagoya University, Nagoya, Aichi 464-8602, Japan
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2
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Zhang Y, Reynoso Y, Reznick D, Wang X. Whole Genome Assembly and Annotation of Blackstripe Livebearer Poeciliopsis prolifica. Genome Biol Evol 2023; 15:evad195. [PMID: 37949830 PMCID: PMC10655195 DOI: 10.1093/gbe/evad195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 10/19/2023] [Accepted: 10/22/2023] [Indexed: 11/12/2023] Open
Abstract
The blackstripe livebearer Poeciliopsis prolifica is a live-bearing fish belonging to the family Poeciliidae with high level of postfertilization maternal investment (matrotrophy). This viviparous matrotrophic species has evolved a structure similarly to the mammalian placenta. Placentas have independently evolved multiple times in Poeciliidae from nonplacental ancestors, which provide an opportunity to study the placental evolution. However, there is a lack of high-quality reference genomes for the placental species in Poeciliidae. In this study, we present a 674 Mb assembly of P. prolifica in 504 contigs with excellent continuity (contig N50 7.7 Mb) and completeness (97.2% Benchmarking Universal Single-Copy Orthologs [BUSCO] completeness score, including 92.6% single-copy and 4.6% duplicated BUSCO score). A total of 27,227 protein-coding genes were annotated from the merged datasets based on bioinformatic prediction, RNA sequencing and homology evidence. Phylogenomic analyses revealed that P. prolifica diverged from the guppy (Poecilia reticulata) ∼19 Ma. Our research provides the necessary resources and the genomic toolkit for investigating the genetic underpinning of placentation.
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Affiliation(s)
- Ying Zhang
- Department of Pathobiology, College of Veterinary Medicine, Auburn University, Alabama, USA
| | - Yuridia Reynoso
- Department of Evolution, Ecology and Organismal Biology, University of California, Riverside, California, USA
| | - David Reznick
- Department of Evolution, Ecology and Organismal Biology, University of California, Riverside, California, USA
| | - Xu Wang
- Department of Pathobiology, College of Veterinary Medicine, Auburn University, Alabama, USA
- Center for Advanced Science, Innovation and Commerce, Alabama Agricultural Experiment Station, Auburn, Alabama, USA
- HudsonAlpha Institute for Biotechnology, Huntsville, Alabama, USA
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3
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Zheng B, Lyu L, Wang X, Wen H, Li Y, Li J, Yao Y, Zuo C, Yan S, Xie S, Qi X. Comparative transcriptomic analysis and genome-wide characterization of the Semaphorin family reveal the potential mechanism of angiogenesis around embryo in ovoviviparous black rockfish (Sebastes schlegelii). Gen Comp Endocrinol 2023; 338:114275. [PMID: 36940835 DOI: 10.1016/j.ygcen.2023.114275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 03/16/2023] [Accepted: 03/17/2023] [Indexed: 03/23/2023]
Abstract
To guarantee the quality and survival rate of their offspring, ovoviviparous teleost evolved special characteristics of in vivo fertilization and embryo development. Maternal black rockfish, having over 50 thousand embryos developing within the ovary simultaneously, provided around 40% nutrition throughout oocyte development, while the capillaries around each embryo contributed the rest 60% during pregnancy. Since fertilization, capillaries started to proliferate and developed into a placenta-like structure that covered over half of each embryo. Aimed to characterize the potential mechanism behind, comparative transcriptome analysis of samples collected according to the process of pregnancy. Three important time point in the process, including mature oocyte stage, fertilization and sarcomere period, were chosen for the transcriptome sequencing. Our study identified key pathways and genes involved in the cell cycle as well as DNA replication and repair, cell migration and adhesion, immune, and metabolic functions. Notably, several of the semaphoring gene family members were differently expressed. To confirm the accuracy of these genes, total of 32 sema genes were identified from the whole genome and distinct expression pattern of sema genes was observed in different pregnant stages. Our results revealed a novel insight for further investigating the functions of sema genes in reproduction physiology and embryo processes in ovoviviparous teleost.
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Affiliation(s)
- Bingyan Zheng
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, China
| | - Likang Lyu
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, China
| | - Xiaojie Wang
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, China
| | - Haishen Wen
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, China
| | - Yun Li
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, China
| | - Jianshuang Li
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, China
| | - Yijia Yao
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, China
| | - Chenpeng Zuo
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, China
| | - Shaojing Yan
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, China
| | - Songyang Xie
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, China
| | - Xin Qi
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, China.
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4
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Méndez-Tepepa M, Morales-Cruz C, García-Nieto E, Anaya-Hernández A. A review of the reproductive system in anuran amphibians. ZOOLOGICAL LETTERS 2023; 9:3. [PMID: 36782341 PMCID: PMC9926845 DOI: 10.1186/s40851-023-00201-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 01/18/2023] [Indexed: 06/18/2023]
Abstract
Reproductive biology is an important topic that is well explored in many vertebrates, but information about frogs' reproductive mechanisms could be improved. Therefore, this review aims to provide organized and specific information on frog reproduction. First, we developed schemes that illustrate the general information regarding reproductive biological mechanisms in frogs in a specific way. Then, we described the physiological, histological, and morphological mechanisms of each organ of the reproductive system of male and female frogs. Finally, this manuscript may contribute to a broader understanding of anuran reproductive biology. Since, understanding frogs' reproductive system permits one to make a comparison with reproduction with other anurans.
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Affiliation(s)
- Maribel Méndez-Tepepa
- Centro de Investigación en Genética y Ambiente, Universidad Autónoma de Tlaxcala, Autopista San Martín-Tlaxcala Km 10.5, Ixtacuixtla, 90120, Tlaxcala, Mexico.
| | - Cuauhtémoc Morales-Cruz
- Centro de Investigación en Genética y Ambiente, Universidad Autónoma de Tlaxcala, Autopista San Martín-Tlaxcala Km 10.5, Ixtacuixtla, 90120, Tlaxcala, Mexico
| | - Edelmira García-Nieto
- Centro de Investigación en Genética y Ambiente, Universidad Autónoma de Tlaxcala, Autopista San Martín-Tlaxcala Km 10.5, Ixtacuixtla, 90120, Tlaxcala, Mexico
| | - Arely Anaya-Hernández
- Centro de Investigación en Genética y Ambiente, Universidad Autónoma de Tlaxcala, Autopista San Martín-Tlaxcala Km 10.5, Ixtacuixtla, 90120, Tlaxcala, Mexico
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Whittington CM, Buddle AL, Griffith OW, Carter AM. Embryonic specializations for vertebrate placentation. Philos Trans R Soc Lond B Biol Sci 2022; 377:20210261. [PMID: 36252220 PMCID: PMC9574634 DOI: 10.1098/rstb.2021.0261] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 02/28/2022] [Indexed: 12/20/2022] Open
Abstract
The vertebrate placenta, a close association of fetal and parental tissue for physiological exchange, has evolved independently in sharks, teleost fishes, coelacanths, amphibians, squamate reptiles and mammals. This transient organ forms during pregnancy and is an important contributor to embryonic development in both viviparous and oviparous, brooding species. Placentae may be involved in transport of respiratory gases, wastes, immune molecules, hormones and nutrients. Depending on the taxon, the embryonic portion of the placenta is comprised of either extraembryonic membranes (yolk sac or chorioallantois) or temporary embryonic tissues derived via hypertrophy of pericardium, gill epithelium, gut, tails or fins. These membranes and tissues have been recruited convergently into placentae in several lineages. Here, we highlight the diversity and common features of embryonic tissues involved in vertebrate placentation and suggest future studies that will provide new knowledge about the evolution of pregnancy. This article is part of the theme issue 'Extraembryonic tissues: exploring concepts, definitions and functions across the animal kingdom'.
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Affiliation(s)
- Camilla M. Whittington
- School of Life and Environmental Sciences, The University of Sydney, Heydon-Laurence A08, New South Wales 2006, Australia
| | - Alice L. Buddle
- School of Life and Environmental Sciences, The University of Sydney, Heydon-Laurence A08, New South Wales 2006, Australia
| | - Oliver W. Griffith
- Department of Biological Sciences, Macquarie University, Sydney, New South Wales 2109, Australia
| | - Anthony M. Carter
- Cardiovascular and Renal Research, Institute of Molecular Medicine, University of Southern Denmark, J. B. Winsloews Vej 21, 5000 Odense, Denmark
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Holt WV, Fazeli A, Otero-Ferrer F. Sperm transport and male pregnancy in seahorses: An unusual model for reproductive science. Anim Reprod Sci 2022; 246:106854. [PMID: 34579988 DOI: 10.1016/j.anireprosci.2021.106854] [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: 05/21/2021] [Revised: 09/14/2021] [Accepted: 09/15/2021] [Indexed: 12/14/2022]
Abstract
The Syngnathidae (seahorses and pipefishes) are a group of teleost fishes in which, uniquely, developing embryos are hosted throughout pregnancy by males, using a specialized brood pouch situated on the abdomen or tail. Seahorses have evolved the most advanced form of brood pouch, whereby zygotes and embryos are intimately connected to the host's circulatory system and also bathed in pouch fluid. The pouch is closed to the external environment and has to perform functions such as gaseous exchange, removal of waste and maintenance of appropriate osmotic conditions, much like the mammalian placenta. Fertilization of the oocytes occurs within the brood pouch, but unlike the mammalian situation the sperm transport mechanism from the ejaculatory duct towards the pouch is unclear, and the sperm: egg ratio (about 5:1) is possibly the least of any vertebrate. In this review, there is highlighting of the difficulty of elucidating the sperm transport mechanism, based on studies of Hippocampus kuda. The similarities between seahorse pouch function and the mammalian placenta have led to suggestions that the pouch provides important nutritional support for the developing embryos, supplementing the nutritional functions of the yolk sac provided by the oocytes. In this review, there is a description of the recent evidence in support of this hypothesis, and also emphasis, as in mammals, that embryonic development depends on nutritional support from the placenta-like pouch at important stages of the gestational period ("critical windows").
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Affiliation(s)
- William V Holt
- Academic Unit of Reproductive and Developmental Medicine, Department of Oncology and Metabolism, University of Sheffield, Level 4, Jessop Wing, Tree Root Walk, Sheffield S10 2SF, UK.
| | - Alireza Fazeli
- Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Tartu, Estonia; Department of Pathophysiology, Institute of Biomedicine and Translational Medicine, Faculty of Medicine, Tartu University, Tartu, Estonia; Academic Unit of Reproductive and Developmental Medicine, Department of Oncology and Metabolism, Medical School, University of Sheffield, Sheffield, UK
| | - Francisco Otero-Ferrer
- University Institute of Sustainable Aquaculture and Marine Ecosystems (IU ECOAQUA) Scientific and Technological Marine Park, University of Las Palmas de Gran Canaria, 35200, Spain
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7
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Conflict and the evolution of viviparity in vertebrates. Behav Ecol Sociobiol 2022. [DOI: 10.1007/s00265-022-03171-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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8
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The Evolution of Viviparity in Vertebrates. ADVANCES IN ANATOMY, EMBRYOLOGY, AND CELL BIOLOGY 2022; 234:7-19. [PMID: 34694475 DOI: 10.1007/978-3-030-77360-1_2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
In the vertebrate tree of life, viviparity or live birth has independently evolved many times, resulting in a rich diversity of reproductive strategies. Viviparity is believed to be a mode of reproduction that evolved from the ancestral condition of oviparity or egg laying, where most of the fetal development occurs outside the body. Today, there is not a simple model of parity transition to explain this species-specific divergence in modes of reproduction. Most evidence points to a gradual series of evolutionary adaptations that account for this phenomenon of reproduction, elegantly displayed by various viviparous squamates that exhibit placentae formed by the appositions of maternal and embryonic tissues, which share significant homology with the tissues that form the placenta in therian mammals. In an era where the genomes of many vertebrate species are becoming available, studies are now exploring the molecular basis of this transition from oviparity to viviparity, and in some rare instances its possible reversibility, such as the Australian three-toed skink (Saiphos equalis). In contrast to the parity diversity in squamates, mammals are viviparous with the notable exception of the egg-laying monotremes. Advancing computational tools coupled with increasing genome availability across species that utilize different reproductive strategies promise to reveal the molecular underpinnings of the ancestral transition of oviparity to viviparity. As a result, the dramatic changes in reproductive physiology and anatomy that accompany these parity changes can be reinterpreted. This chapter will briefly explore the vertebrate modes of reproduction using a phylogenetic framework and where possible highlight the role of potential candidate genes that may help explain the polygenic origins of live birth.
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Mulder KP, Alarcón-Ríos L, Nicieza AG, Fleischer RC, Bell RC, Velo-Antón G. Independent evolutionary transitions to pueriparity across multiple timescales in the viviparous genus Salamandra. Mol Phylogenet Evol 2021; 167:107347. [PMID: 34763070 DOI: 10.1016/j.ympev.2021.107347] [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: 06/21/2021] [Revised: 10/21/2021] [Accepted: 11/03/2021] [Indexed: 02/07/2023]
Abstract
The ability to bear live offspring, viviparity, has evolved multiple times across the tree of life and is a remarkable adaptation with profound life-history and ecological implications. Within amphibians the ancestral reproductive mode is oviparity followed by a larval life stage, but viviparity has evolved independently in all three amphibian orders. Two types of viviparous reproduction can be distinguished in amphibians; larviparity and pueriparity. Larviparous amphibians deliver larvae into nearby ponds and streams, while pueriparous amphibians deliver fully developed juveniles and thus do not require waterbodies for reproduction. Among amphibians, the salamander genus Salamandra is remarkable as it exhibits both inter- and intraspecific variation in the occurrence of larviparity and pueriparity. While the evolutionary relationships among Salamandra lineages have been the focus of several recent studies, our understanding of how often and when transitions between modes occurred is still incomplete. Furthermore, in species with intraspecific variation, the reproductive mode of a given population can only be confirmed by direct observation of births and thus the prevalence of pueriparous populations is also incompletely documented. We used sequence capture to obtain 1,326 loci from 94 individuals from across the geographic range of the genus, focusing on potential reproductive mode transition zones. We also report additional direct observations of pueriparous births for 20 new locations and multiple lineages. We identify at least five independent transitions from the ancestral mode of larviparity to pueriparity among and within species, occurring at different evolutionary timescales ranging from the Pliocene to the Holocene. Four of these transitions occurred within species. Based on a distinct set of markers and analyses, we also confirm previous findings of introgression between species and the need for taxonomic revisions in the genus. We discuss the implications of our findings with respect to the evolution of this complex trait, and the potential of using five independent convergent transitions for further studies on the ecological context in which pueriparity evolves and the genetic architecture of this specialized reproductive mode.
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Affiliation(s)
- Kevin P Mulder
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Campus de Vairão, Universidade do Porto, 4485-661 Vairão, Portugal; BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Campus de Vairão, 4485-661 Vairão, Portugal; Department of Vertebrate Zoology, National Museum of Natural History, Smithsonian Institution, 1000 Constitution Avenue NW, Washington, DC 20560, USA; Center for Conservation Genomics, Smithsonian Conservation Biology Institute, National Zoological Park, 3001 Connecticut Avenue NW, Washington, DC 20008, USA.
| | - Lucía Alarcón-Ríos
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Campus de Vairão, Universidade do Porto, 4485-661 Vairão, Portugal; BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Campus de Vairão, 4485-661 Vairão, Portugal; Departamento de Biología de Organismos y Sistemas, Universidad de Oviedo UO, Oviedo, Spain
| | - Alfredo G Nicieza
- Departamento de Biología de Organismos y Sistemas, Universidad de Oviedo UO, Oviedo, Spain; Biodiversity Research Institute (IMIB), University of Oviedo-Principality of Asturias-CSIC, 33600 Mieres, Spain
| | - Robert C Fleischer
- Center for Conservation Genomics, Smithsonian Conservation Biology Institute, National Zoological Park, 3001 Connecticut Avenue NW, Washington, DC 20008, USA
| | - Rayna C Bell
- Department of Vertebrate Zoology, National Museum of Natural History, Smithsonian Institution, 1000 Constitution Avenue NW, Washington, DC 20560, USA; Herpetology Department, California Academy of Sciences, 55 Music Concourse Drive, San Francisco, CA 94118, USA
| | - Guillermo Velo-Antón
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Campus de Vairão, Universidade do Porto, 4485-661 Vairão, Portugal; BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Campus de Vairão, 4485-661 Vairão, Portugal; Universidade de Vigo, Grupo GEA, Departamento de Ecoloxía e Bioloxía Animal, Vigo, Spain.
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Alarcón-Ríos L, Velo-Antón G. Multiple paternity in the pueriparous North African fire salamander, Salamandra algira, supports polyandry as a successful mating strategy in low fecundity Salamandra lineages. AMPHIBIA-REPTILIA 2021. [DOI: 10.1163/15685381-bja10075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Abstract
Multiple paternity is widespread in nature and despite costs, it has many associated benefits like increased genetic diversity and fertilization success. It has been described in many viviparous systems, suggesting the existence of some fitness advantages counteracting the inherent costs of viviparity, such as fecundity reduction and high parental investment. Reproductively polymorphic species, like the urodele Salamandra algira, which shows two types of viviparity: larviparity (i.e., delivering aquatic larvae), and pueriparity (i.e., delivering terrestrial metamorphosed juveniles), are suitable systems to study the relationship between reproductive modes and polygamous mating. Here, multiple paternity is confirmed in a pueriparous lineage of S. algira, as previously verified for the pueriparous lineages of the reproductively polymorphic species S. salamandra, suggesting polyandry is a successful mating strategy in pueriparous systems with reduced brood sizes. We discuss the potential benefits of polyandry in the context of viviparity evolution in urodeles.
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Affiliation(s)
- Lucía Alarcón-Ríos
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Campus de Vairão, Universidade do Porto, 4485-661 Vairão, Portugal
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Campus de Vairão, 4485-661 Vairão, Portugal
| | - Guillermo Velo-Antón
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Campus de Vairão, Universidade do Porto, 4485-661 Vairão, Portugal
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Campus de Vairão, 4485-661 Vairão, Portugal
- Universidade de Vigo, Departamento de Ecoloxía e Bioloxía Animal, Grupo de Ecoloxía Animal, Torre Cacti (Lab 97), E-36310, Vigo, Spain
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11
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Saleh-Subaie N, Ramírez-Cruz GA, Zúñiga-Vega JJ. Examination of the Trexler-DeAngelis Model of Maternal Provisioning Reveals That Matrotrophy Is Costly. Front Ecol Evol 2021. [DOI: 10.3389/fevo.2021.690430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The evolution of matrotrophy (post-fertilization maternal provisioning to developing embryos) has been explained through several hypotheses. Trexler and DeAngelis proposed in 2003 a theoretical model that defines the ecological conditions under which matrotrophy would be favored over lecithotrophy (pre-fertilization maternal provisioning). According to this model, matrotrophy offers a selective advantage in environments with abundant and constantly available food, whereas environments with limited and fluctuating food resources should instead promote a lecithotrophic mode of maternal provisioning. This model also proposes that matrotrophy entails the consequence of leaner reproductive females and in turn shorter lifespans. In this study, we examined the Trexler-DeAngelis model using data from 45 populations of five viviparous species from the fish genus Poeciliopsis (family Poeciliidae). We used the matrotrophy index (MI) as a measure of post-fertilization maternal provisioning, and the index of stomach fullness and individual body condition (BC) as proxies for food availability. We also estimated the magnitude of fluctuations in food availability by calculating the temporal variances of these two proxies. Neither abundant nor constantly available food were associated with greater degrees of matrotrophy, which fails to support the predictions of the Trexler-DeAngelis model with respect to the ecological drivers of increased post-fertilization provisioning to embryos. Nonetheless, in all five species we observed that females with greater degrees of matrotrophy had poorer BC compared to females that provided less nutrients to embryos after fertilization. This finding is consistent with one of the expected consequences of advanced matrotrophy according to the Trexler-DeAngelis model, namely, a detriment to the nutritional status of females. Our study provides compelling evidence that gestating females experience a trade-off between post-fertilization provisioning to embryos and self-maintenance, revealing in turn that matrotrophy is a costly reproductive strategy.
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Starck JM, Stewart JR, Blackburn DG. Phylogeny and evolutionary history of the amniote egg. J Morphol 2021; 282:1080-1122. [PMID: 33991358 DOI: 10.1002/jmor.21380] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 05/07/2021] [Accepted: 05/12/2021] [Indexed: 01/02/2023]
Abstract
We review morphological features of the amniote egg and embryos in a comparative phylogenetic framework, including all major clades of extant vertebrates. We discuss 40 characters that are relevant for an analysis of the evolutionary history of the vertebrate egg. Special attention is given to the morphology of the cellular yolk sac, the eggshell, and extraembryonic membranes. Many features that are typically assigned to amniotes, such as a large yolk sac, delayed egg deposition, and terrestrial reproduction have evolved independently and convergently in numerous clades of vertebrates. We use phylogenetic character mapping and ancestral character state reconstruction as tools to recognize sequence, order, and patterns of morphological evolution and deduce a hypothesis of the evolutionary history of the amniote egg. Besides amnion and chorioallantois, amniotes ancestrally possess copulatory organs (secondarily reduced in most birds), internal fertilization, and delayed deposition of eggs that contain an embryo in the primitive streak or early somite stage. Except for the amnion, chorioallantois, and amniote type of eggshell, these features evolved convergently in almost all major clades of aquatic vertebrates possibly in response to selective factors such as egg predation, hostile environmental conditions for egg development, or to adjust hatching of young to favorable season. A functionally important feature of the amnion membrane is its myogenic contractility that moves the (early) embryo and prevents adhering of the growing embryo to extraembryonic materials. This function of the amnion membrane and the liquid-filled amnion cavity may have evolved under the requirements of delayed deposition of eggs that contain developing embryos. The chorioallantois is a temporary embryonic exchange organ that supports embryonic development. A possible evolutionary scenario is that the amniote egg presents an exaptation that paved the evolutionary pathway for reproduction on land. As shown by numerous examples from anamniotes, reproduction on land has occurred multiple times among vertebrates-the amniote egg presenting one "solution" that enabled the conquest of land for reproduction.
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Affiliation(s)
- J Matthias Starck
- Department of Biology, Ludwig-Maximilians-University Munich, Planegg-Martinsried, Germany
| | - James R Stewart
- Department of Biology, Ludwig-Maximilians-University Munich, Planegg-Martinsried, Germany.,Department of Biological Sciences, East Tennessee State University, Johnson City, Tennessee, USA
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Meiri S, Murali G, Zimin A, Shak L, Itescu Y, Caetano G, Roll U. Different solutions lead to similar life history traits across the great divides of the amniote tree of life. ACTA ACUST UNITED AC 2021; 28:3. [PMID: 33557958 PMCID: PMC7869468 DOI: 10.1186/s40709-021-00134-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 01/15/2021] [Indexed: 02/07/2023]
Abstract
Amniote vertebrates share a suite of extra-embryonic membranes that distinguish them from anamniotes. Other than that, however, their reproductive characteristics could not be more different. They differ in basic ectothermic vs endothermic physiology, in that two clades evolved powered flight, and one clade evolved a protective shell. In terms of reproductive strategies, some produce eggs and others give birth to live young, at various degrees of development. Crucially, endotherms provide lengthy parental care, including thermal and food provisioning—whereas ectotherms seldom do. These differences could be expected to manifest themselves in major differences between clades in quantitative reproductive traits. We review the reproductive characteristics, and the distributions of brood sizes, breeding frequencies, offspring sizes and their derivatives (yearly fecundity and biomass production rates) of the four major amniote clades (mammals, birds, turtles and squamates), and several major subclades (birds: Palaeognathae, Galloanserae, Neoaves; mammals: Metatheria and Eutheria). While there are differences between these clades in some of these traits, they generally show similar ranges, distribution shapes and central tendencies across birds, placental mammals and squamates. Marsupials and turtles, however, differ in having smaller offspring, a strategy which subsequently influences other traits.
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Affiliation(s)
- Shai Meiri
- School of Zoology, Tel Aviv University, 6997801, Tel Aviv, Israel. .,The Steinhardt Museum of Natural History, Tel Aviv University, 6997801, Tel Aviv, Israel.
| | - Gopal Murali
- Mitrani Department of Desert Ecology, The Jacob Blaustein Institutes for Desert Research, Ben Gurion University of the Negev, Midreshet Ben Gurion, Israel
| | - Anna Zimin
- School of Zoology, Tel Aviv University, 6997801, Tel Aviv, Israel
| | - Lior Shak
- School of Zoology, Tel Aviv University, 6997801, Tel Aviv, Israel
| | - Yuval Itescu
- Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), 12587, Berlin, Germany.,Institute of Biology, Freie Universität Berlin, 14195, Berlin, Germany
| | - Gabriel Caetano
- Mitrani Department of Desert Ecology, The Jacob Blaustein Institutes for Desert Research, Ben Gurion University of the Negev, Midreshet Ben Gurion, Israel
| | - Uri Roll
- Mitrani Department of Desert Ecology, The Jacob Blaustein Institutes for Desert Research, Ben Gurion University of the Negev, Midreshet Ben Gurion, Israel
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14
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Abstract
Amphibians represent a diverse group of animals with highly varied behaviors depending on their anatomy, physiology, and ecological niche. Behavioral and welfare issues in amphibians are frequent in captive settings and warrant evaluation. Welfare criteria and clinical diagnostic assays when combined with a comprehension of the natural history of a species are useful tools to improve both the well-being of the individual animal and the population. Correction of environmental factors that affect behavior and, secondarily, survival and reproduction is important in captivity and for the conservation of wild populations.
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Affiliation(s)
- Shannon T Ferrell
- Zoo de Granby, 525, rue Saint-Hubert, Granby, Quebec J2G 5P3, Canada.
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15
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Hagmayer A, Furness AI, Pollux BJA. Parasite infestation influences life history but not boldness behavior in placental live-bearing fish. Oecologia 2020; 194:635-648. [PMID: 33141323 PMCID: PMC7683485 DOI: 10.1007/s00442-020-04795-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 10/24/2020] [Indexed: 11/29/2022]
Abstract
Parasites can negatively affect the reproductive success of hosts. Placental species may be particularly susceptible, because parasite-induced stress during pregnancy could potentially influence embryo development. Here, we examine the consequences of a trematode infestation (black spot disease, BSD) for fetal development and adult behavior in 19 natural populations of the placental live-bearing fish species Poeciliopsis retropinna (Poeciliidae) in Costa Rica. First, we observed substantial variation in parasite infestation among populations which correlated with a number of local environmental conditions (elevation, river width, depth, and flow velocity). Furthermore, we observed substantial variation in parasite infestation among females within populations associated with maternal age and size. We found that the infestation rate significantly influenced embryonic development, with more heavily parasitized females producing smaller and worse-conditioned offspring at birth, possibly, because a costly immune response during pregnancy limits, either directly or indirectly, nourishment to developing embryos. Finally, a behavioral experiment in the field showed that the infestation rate did not affect an individual's boldness. Our study indicates that in placental live-bearing fish parasite infestation leads to reduced embryo provisioning during pregnancy, resulting in a smaller offspring size and quality at birth potentially with negative implications for offspring fitness.
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Affiliation(s)
- Andres Hagmayer
- Experimental Zoology Group, Department of Animal Sciences, Wageningen University, 6708 WD, Wageningen, The Netherlands
| | - Andrew I Furness
- Department of Ecology and Evolutionary Biology, University of California, Irvine, CA, 92697, USA.,Department of Biological and Marine Sciences, University of Hull, Hull, HU6 7RX, UK
| | - Bart J A Pollux
- Experimental Zoology Group, Department of Animal Sciences, Wageningen University, 6708 WD, Wageningen, The Netherlands.
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16
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Schulte LM, Ringler E, Rojas B, Stynoski JL. Developments in Amphibian Parental Care Research: History, Present Advances, and Future Perspectives. HERPETOLOGICAL MONOGRAPH 2020; 34:71-97. [PMID: 38989507 PMCID: PMC7616153 DOI: 10.1655/herpmonographs-d-19-00002.1] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Despite rising interest among scientists for over two centuries, parental care behavior has not been as thoroughly studied in amphibians as it has in other taxa. The first reports of amphibian parental care date from the early 18th century, when Maria Sibylla Merian went on a field expedition in Suriname and reported frog metamorphs emerging from their mother's dorsal skin. Reports of this and other parental behaviors in amphibians remained descriptive for decades, often as side notes during expeditions with another purpose. However, since the 1980s, experimental approaches have proliferated, providing detailed knowledge about the adaptive value of observed behaviors. Today, we recognize more than 30 types of parental care in amphibians, but most studies focus on just a few families and have favored anurans over urodeles and caecilians. Here, we provide a synthesis of the last three centuries of parental care research in the three orders comprising the amphibians. We draw attention to the progress from the very first descriptions to the most recent experimental studies, and highlight the importance of natural history observations as a source of new hypotheses and necessary context to interpret experimental findings. We encourage amphibian parental care researchers to diversify their study systems to allow for a more comprehensive perspective of the behaviors that amphibians exhibit. Finally, we uncover knowledge gaps and suggest new avenues of research using a variety of disciplines and approaches that will allow us to better understand the function and evolution of parental care behaviors in this diverse group of animals.
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Affiliation(s)
- Lisa M. Schulte
- Goethe University Frankfurt, Faculty of Biological Sciences, Max-von-Laue-Strasse 13, 60438Frankfurt, Germany
| | - Eva Ringler
- Messerli Research Institute, University of Veterinary Medicine Vienna, Medical University of Vienna, University of Vienna, Veterinaerplatz 1, A-1210Vienna, Austria
- University of Vienna, Department of Integrative Zoology, Althanstrasse 14, A-1090Vienna, Austria
| | - Bibiana Rojas
- University of Jyvaskyla, Department of Biology and Environmental Science, P.O. Box 35, 40014, Jyväskylä, Finland
| | - Jennifer L. Stynoski
- Colorado State University, Department of Biology, 200 W. Lake Street, Fort Collins, CO, 48823USA
- Instituto Clodomiro Picado, Universidad de Costa Rica, Dulce Nombre de Coronado, San José, Costa Rica
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17
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Whittington CM, Friesen CR. The evolution and physiology of male pregnancy in syngnathid fishes. Biol Rev Camb Philos Soc 2020; 95:1252-1272. [PMID: 32372478 DOI: 10.1111/brv.12607] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Revised: 04/09/2020] [Accepted: 04/09/2020] [Indexed: 12/24/2022]
Abstract
The seahorses, pipefishes and seadragons (Syngnathidae) are among the few vertebrates in which pregnant males incubate developing embryos. Syngnathids are popular in studies of sexual selection, sex-role reversal, and reproductive trade-offs, and are now emerging as valuable comparative models for the study of the biology and evolution of reproductive complexity. These fish offer the opportunity to examine the physiology, behavioural implications, and evolutionary origins of embryo incubation, independent of the female reproductive tract and female hormonal milieu. Such studies allow us to examine flexibility in regulatory systems, by determining whether the pathways underpinning female pregnancy are also co-opted in incubating males, or whether novel pathways have evolved in response to the common challenges imposed by incubating developing embryos and releasing live young. The Syngnathidae are also ideal for studies of the evolution of reproductive complexity, because they exhibit multiple parallel origins of complex reproductive phenotypes. Here we assay the taxonomic distribution of syngnathid parity mode, examine the selective pressures that may have led to the emergence of male pregnancy, describe the biology of syngnathid reproduction, and highlight pressing areas for future research. Experimental tests of a range of hypotheses, including many generated with genomic tools, are required to inform overarching theories about the fitness implications of pregnancy and the evolution of male pregnancy. Such information will be widely applicable to our understanding of fundamental reproductive and evolutionary processes in animals.
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Affiliation(s)
- Camilla M Whittington
- The University of Sydney, School of Life and Environmental Sciences, Sydney, New South Wales, 2006, Australia.,The University of Sydney, Sydney School of Veterinary Science, Sydney, New South Wales, 2006, Australia
| | - Christopher R Friesen
- The University of Wollongong, School of Earth, Atmospheric and Life Sciences, Faculty of Science, Medicine and Health, Wollongong, New South Wales, 2522, Australia.,Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Wollongong, New South Wales, 2522, Australia
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18
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Farmer CG. Parental Care, Destabilizing Selection, and the Evolution of Tetrapod Endothermy. Physiology (Bethesda) 2020; 35:160-176. [PMID: 32293231 DOI: 10.1152/physiol.00058.2018] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Parental care has evolved convergently an extraordinary number of times among tetrapods that reproduce terrestrially, suggesting strong positive selection for this behavior in the terrestrial environment. This review speculates that destabilizing selection on parental care, and especially embryo incubation, drove the convergent evolution of many tetrapod traits, including endothermy.
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Affiliation(s)
- C G Farmer
- Trinity College Dublin, Dublin, Ireland; and University of Utah, Salt Lake City, Utah
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19
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Hagmayer A, Furness AI, Reznick DN, Dekker ML, Pollux BJA. Predation risk shapes the degree of placentation in natural populations of live-bearing fish. Ecol Lett 2020; 23:831-840. [PMID: 32166847 PMCID: PMC7187176 DOI: 10.1111/ele.13487] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 02/04/2020] [Accepted: 02/14/2020] [Indexed: 12/01/2022]
Abstract
The placenta is a complex life‐history trait that is ubiquitous across the tree of life. Theory proposes that the placenta evolves in response to high performance‐demanding conditions by shifting maternal investment from pre‐ to post‐fertilisation, thereby reducing a female’s reproductive burden during pregnancy. We test this hypothesis by studying populations of the fish species Poeciliopsis retropinna in Costa Rica. We found substantial variation in the degree of placentation among natural populations associated with predation risk: females from high predation populations had significantly higher degrees of placentation compared to low predation females, while number, size and quality of offspring at birth remained unaffected. Moreover, a higher degree of placentation correlated with a lower reproductive burden and hence likely an improved swimming performance during pregnancy. Our study advances an adaptive explanation for why the placenta evolves by arguing that an increased degree of placentation offers a selective advantage in high predation environments.
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Affiliation(s)
- Andres Hagmayer
- Department of Animal Sciences, Wageningen University, 6708 WD, Wageningen, Netherlands
| | - Andrew I Furness
- Department of Ecology and Evolutionary Biology, University of California, Irvine, CA, 92697, USA.,Department of Biological and Marine Sciences, University of Hull, HU6 7RX, Hull, UK
| | - David N Reznick
- Department of Biology, University of California, Riverside, CA, 92521, USA
| | - Myrthe L Dekker
- Department of Animal Sciences, Wageningen University, 6708 WD, Wageningen, Netherlands
| | - Bart J A Pollux
- Department of Animal Sciences, Wageningen University, 6708 WD, Wageningen, Netherlands
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20
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Alarcón-Ríos L, Nicieza AG, Kaliontzopoulou A, Buckley D, Velo-Antón G. Evolutionary History and Not Heterochronic Modifications Associated with Viviparity Drive Head Shape Differentiation in a Reproductive Polymorphic Species, Salamandra salamandra. Evol Biol 2019. [DOI: 10.1007/s11692-019-09489-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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21
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Abstract
Parental care is extremely diverse across species, ranging from simple behaviours to complex adaptations, varying in duration and in which sex cares. Surprisingly, we know little about how such diversity has evolved. Here, using phylogenetic comparative methods and data for over 1300 amphibian species, we show that egg attendance, arguably one of the simplest care behaviours, is gained and lost faster than any other care form, while complex adaptations, like brooding and viviparity, are lost at very low rates, if at all. Prolonged care from the egg to later developmental stages evolves from temporally limited care, but it is as easily lost as it is gained. Finally, biparental care is evolutionarily unstable regardless of whether the parents perform complementary or similar care duties. By considering the full spectrum of parental care adaptations, our study reveals a more complex and nuanced picture of how care evolves, is maintained, or is lost. Parental care can take many forms but how this diversity arises is not well understood. Here, the authors compile data for over 1300 amphibian species and show that different forms of care evolve at different rates, prolonged care can be easily reduced, and biparental care is evolutionarily unstable.
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22
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Lourenço A, Gonçalves J, Carvalho F, Wang IJ, Velo‐Antón G. Comparative landscape genetics reveals the evolution of viviparity reduces genetic connectivity in fire salamanders. Mol Ecol 2019; 28:4573-4591. [DOI: 10.1111/mec.15249] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 08/22/2019] [Accepted: 09/16/2019] [Indexed: 01/07/2023]
Affiliation(s)
- André Lourenço
- Departamento de Biologia Faculdade de Ciências Universidade do Porto Porto Portugal
- CIBIO/InBIO Centro de Investigação em Biodiversidade e Recursos Genéticos da Universidade do Porto Instituto de Ciências Agrárias de Vairão Vairão Portugal
| | - João Gonçalves
- CIBIO/InBIO Centro de Investigação em Biodiversidade e Recursos Genéticos da Universidade do Porto Instituto de Ciências Agrárias de Vairão Vairão Portugal
| | - Filipe Carvalho
- CIBIO/InBIO Centro de Investigação em Biodiversidade e Recursos Genéticos da Universidade do Porto Instituto de Ciências Agrárias de Vairão Vairão Portugal
- Department of Zoology and Entomology School of Biological and Environmental Sciences University of Fort Hare Alice South Africa
| | - Ian J. Wang
- Department of Environmental Science, Policy, and Management University of California Berkeley CA USA
| | - Guillermo Velo‐Antón
- CIBIO/InBIO Centro de Investigação em Biodiversidade e Recursos Genéticos da Universidade do Porto Instituto de Ciências Agrárias de Vairão Vairão Portugal
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23
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Abstract
Vitellogenin (Vtg), a yolk nutrient protein that is synthesized in the livers of female animals, and subsequently carried into the ovary, contributes to vitellogenesis in oviparous animals. Thus, Vtg levels are elevated during oogenesis. In contrast, Vtg proteins have been genetically lost in viviparous mammals, thus the yolk protein is not involved in their oogenesis and embryonic development. In this study, we identified Vtg protein in the livers of females during the gestation of the viviparous teleost, Xenotoca eiseni Although vitellogenesis is arrested during gestation, biochemical assays revealed that Vtg protein was present in ovarian tissues and lumen fluid. The Vtg protein was also detected in the trophotaeniae of the intraovarian embryo. Immunoelectron microscopy revealed that Vtg protein is absorbed into intracellular vesicles in the epithelial cells of the trophotaeniae. Furthermore, extraneous Vtg protein injected into the abdominal cavity of a pregnant female was subsequently detected in the trophotaeniae of the intraovarian embryo. Our data suggest that the yolk protein is one of the matrotrophic factors supplied from the mother to the intraovarian embryo during gestation in X. eiseni.
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24
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Blackburn DG. The oviparous olm: Analysis & refutation of claims for viviparity in the cave salamander Proteus anguinus (Amphibia: Proteidae). ZOOL ANZ 2019. [DOI: 10.1016/j.jcz.2019.05.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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25
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Genetic introgression among differentiated clades is lower among clades exhibiting different parity modes. Heredity (Edinb) 2019; 123:264-272. [PMID: 30833744 DOI: 10.1038/s41437-019-0201-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 12/19/2018] [Accepted: 01/20/2019] [Indexed: 11/08/2022] Open
Abstract
Mechanisms leading to sympatric speciation are diverse and may build up reproductive isolation. Reproductive isolation among differentiated clades may exist due to genetic incompatibilities, sexual selection, differences in parity mode, reduced post-zygotic survival or reproductive success of hybrids. Here, we test whether differences in parity mode lead to reproductive isolation by investigating introgression in Zootoca vivipara, a lizard species exhibiting oviparous and viviparous reproduction. We measured introgression in transects spanning different viviparous clades, different oviparous subclades, transects containing oviparous and viviparous clades, and transects within the same subclade (control transects). Introgression in transects spanning oviparous and viviparous clades was one order of magnitude smaller than transects spanning the same reproductive mode and no statistical differences existed between transects spanning the same reproductive mode and control transects. Among types of transects, no significant differences existed in genetic and geographic distances, nor number of detected alleles. Moreover, hybrids were detected in all types of transects, showing that parity mode alone does not necessarily lead to complete reproductive isolation, which suggests that reinforcement may play an important role. The evolution of different parity modes together with reinforcement may thus promote reproductive isolation and rapid speciation, potentially explaining why only six of the almost 40,000 vertebrates belonging to groups consisting of viviparous and oviparous species exhibit bimodal reproduction.
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26
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Morrison KR, Ngo V, Cardullo RA, Reznick DN. How fish eggs are preadapted for the evolution of matrotrophy. Proc Biol Sci 2018; 284:rspb.2017.1342. [PMID: 29167357 DOI: 10.1098/rspb.2017.1342] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 10/19/2017] [Indexed: 11/12/2022] Open
Abstract
Teleost fishes evolved livebearing via egg retention 14 times. Matrotrophy has evolved within 12 of those lineages. By contrast, squamate reptiles evolved livebearing over 115 times, but only two to four of those lineages are known to have evolved matrotrophy. Is the discrepancy between these organisms in the probability of this transition caused by differences in their eggs? We show that the eggs of oviparous species in the superorder Atherinomorpha can acquire small organic molecules from their surrounding environment against a concentration gradient via mechanisms of active transport. Uptake rates were inhibited by competing radiolabelled amino acids against unlabelled versions of themselves. Transport was non-specific as uptake rates were similar for l-leucine and its biologically uncommon enantiomer d-leucine. Eggs are also capable of transporting larger microspheres across the membrane, but transport is inhibited at temperatures below 4°C, suggesting active transport occurs via pinocytosis. Conflict theory predicts that the ability of the egg to acquire maternal resources will facilitate the embryo-parent arms race that leads to the evolution of matrotrophy following the transition to livebearing. The shelled eggs of amniotes lack such access to maternal resources when retained in the evolution of viviparity.
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Affiliation(s)
- Keenan R Morrison
- Department of Biology, University of California, Riverside, CA 92507, USA
| | - Vyvian Ngo
- Department of Biology, University of California, Riverside, CA 92507, USA
| | - Richard A Cardullo
- Department of Biology, University of California, Riverside, CA 92507, USA
| | - David N Reznick
- Department of Biology, University of California, Riverside, CA 92507, USA
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27
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Warne RW, Catenazzi A. Pouch brooding marsupial frogs transfer nutrients to developing embryos. Biol Lett 2017; 12:rsbl.2016.0673. [PMID: 28120810 DOI: 10.1098/rsbl.2016.0673] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Accepted: 10/05/2016] [Indexed: 11/12/2022] Open
Abstract
Marsupial frogs have a unique reproductive mode in which females carry eggs enclosed in a sealed dorsal brood pouch. While most anurans are considered to be oviparous with lecithotrophic eggs, the extensively vascularized membrane of the brood pouch in marsupial frogs suggests potential opportunities for nutrient transfer. We tested for matrotrophy in the live-bearing Gastrotheca excubitor (Hemiphractidae), through feeding insects labelled with a 13C-fatty acid and a 15N-amino acid to brooding marsupial frogs. We observed significant increases of δ13C and δ15N in both maternal pouch tissues and embryos, suggesting nutrient transfer. Embryo dry mass also increased with developmental stage, providing further direct evidence for matrotrophy. These results suggest that in addition to gas exchange, the vascularized brood pouch membrane of G. excubitor also enables maternal nutrient transfer. This finding revealed a suspected but untested trait in the evolution of parental care in marsupial frogs, in contrast to previous work on Gastrotheca species that release tadpoles, and suggests greater complexity in reproductive and provisioning modes than previously thought.
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Affiliation(s)
- Robin W Warne
- Department of Zoology, Southern Illinois University, 1125 Lincoln Drive, Carbondale, IL 62901-6501, USA
| | - Alessandro Catenazzi
- Department of Zoology, Southern Illinois University, 1125 Lincoln Drive, Carbondale, IL 62901-6501, USA
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28
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Sandberger-Loua L, Müller H, Rödel MO. A review of the reproductive biology of the only known matrotrophic viviparous anuran, the West African Nimba toad, Nimbaphrynoides occidentalis. ZOOSYST EVOL 2017. [DOI: 10.3897/zse.93.10489] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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29
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Multiple paternity in a viviparous toad with internal fertilisation. Naturwissenschaften 2016; 103:51. [PMID: 27262290 DOI: 10.1007/s00114-016-1377-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 05/16/2016] [Accepted: 05/25/2016] [Indexed: 10/21/2022]
Abstract
Anurans are renowned for a high diversity of reproductive modes, but less than 1 % of species exhibit internal fertilisation followed by viviparity. In the live-bearing West African Nimba toad (Nimbaphrynoides occidentalis), females produce yolk-poor eggs and internally nourish their young after fertilisation. Birth of fully developed juveniles takes place after 9 months. In the present study, we used genetic markers (eight microsatellite loci) to assign the paternity of litters of 12 females comprising on average 9.7 juveniles. In 9 out of 12 families (75 %), a single sire was sufficient; in three families (25 %), more than one sire was necessary to explain the observed genotypes in each family. These findings are backed up with field observations of male resource defence (underground cavities in which mating takes place) as well as coercive mating attempts, suggesting that the observed moderate level of multiple paternity in a species without distinct sperm storage organs is governed by a balance of female mate choice and male reproductive strategies.
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30
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Kupfer A, Maxwell E, Reinhard S, Kuehnel S. The evolution of parental investment in caecilian amphibians: a comparative approach. Biol J Linn Soc Lond 2016. [DOI: 10.1111/bij.12805] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexander Kupfer
- Staatliches Museum für Naturkunde Stuttgart; Rosenstein 1 Stuttgart 70191 Germany
- Institut für Biochemie und Biologie; Allgemeine Zoologie und Evolutionsgenomik; Universität Potsdam; Karl-Liebknecht-Strasse 24-25 Haus 26 Potsdam 14476 Germany
- Institut für Spezielle Zoologie und Evolutionsbiologie mit Phyletischem Museum; Friedrich Schiller-Universität Jena; Erbertstrasse 1 Jena 07743 Germany
| | - Erin Maxwell
- Staatliches Museum für Naturkunde Stuttgart; Rosenstein 1 Stuttgart 70191 Germany
| | - Sandy Reinhard
- Institut für Spezielle Zoologie und Evolutionsbiologie mit Phyletischem Museum; Friedrich Schiller-Universität Jena; Erbertstrasse 1 Jena 07743 Germany
- Naturhistorisches Museum; Thüringer Landesmuseum Heidecksburg; Schlossbezirk 1 Rudolstadt 07407 Germany
| | - Susanne Kuehnel
- Institut für Spezielle Zoologie und Evolutionsbiologie mit Phyletischem Museum; Friedrich Schiller-Universität Jena; Erbertstrasse 1 Jena 07743 Germany
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31
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Pewhom A, Chumnanpuen P, Muikham I, Chatchavalvanich K, Srakaew N. Microscopic structures of the ovary and female genital ducts of Supachai's caecilian,Ichthyophis supachaiiTaylor, 1960 (Amphibia: Gymnophiona). ACTA ZOOL-STOCKHOLM 2015. [DOI: 10.1111/azo.12139] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Akkanee Pewhom
- Department of Zoology; Faculty of Science; Kasetsart University; Bangkok 10900 Thailand
| | - Pramote Chumnanpuen
- Department of Zoology; Faculty of Science; Kasetsart University; Bangkok 10900 Thailand
| | - Itsares Muikham
- Department of Zoology; Faculty of Science; Kasetsart University; Bangkok 10900 Thailand
| | | | - Nopparat Srakaew
- Department of Zoology; Faculty of Science; Kasetsart University; Bangkok 10900 Thailand
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32
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Blackburn DG, Starck JM. Morphological specializations for fetal maintenance in viviparous vertebrates: An introduction and historical retrospective. J Morphol 2015; 276:E1-16. [DOI: 10.1002/jmor.20410] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2015] [Accepted: 05/11/2015] [Indexed: 12/18/2022]
Affiliation(s)
- Daniel G. Blackburn
- Department of Biology; and Electron Microscopy Center; Trinity College; Hartford Connecticut 06106
| | - J. Matthias Starck
- Department of Biology; University of Munich; D-82152 Planegg-Martinsried Germany
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