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Domínguez-Castanedo O, Valdez-Carbajal S. Developmental ecology in embryos of an estuarine pupfish endemic of the Yucatan peninsula: Survival out of water, metabolic depression, and asynchronous hatching. Dev Dyn 2024. [PMID: 39166847 DOI: 10.1002/dvdy.732] [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: 03/27/2024] [Revised: 07/17/2024] [Accepted: 08/06/2024] [Indexed: 08/23/2024] Open
Abstract
BACKGROUND Theory predicts that drought-resistant embryos with extended incubations are evolutionarily favored in environments with high mortality of larvae but safe for eggs. Here, we experimentally test, under common garden conditions, the effect of three incubation temperatures and media on embryonic developmental length, extended incubation out of the water, survival, metabolic rate, and hatching dynamics in the estuarine pupfish Garmanella pulchra. We also described the morphological changes of embryonic cortical structures related to air exposure. RESULTS We found that embryos incubated out of water in low and medium temperatures present an extended incubation period beyond their hatching capability with a deep metabolic depression. Also, these embryos exhibited a hatching asynchrony not related to water availability. Embryos incubated at high temperatures did not show extended incubation, with decreased probability of survival out of water. Our morphological observations of the embryonic cortical structures reveal that the perivitelline space and hair-like filaments buffer the deleterious drought effects. CONCLUSIONS Our results reveal that G. pulchra possesses life-history traits typical of two separate phenomena: delay hatching and diapause; supporting a true continuum between them, rather than a dichotomy. The evolution of these traits may respond to aerial exposure during low tides in the estuaries of Yucatán they inhabit.
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Affiliation(s)
- Omar Domínguez-Castanedo
- Asociación Mexicana para el Estudio y Conservación de Cyprinodontiformes, Ciudad de Mexico, Mexico
| | - Sharon Valdez-Carbajal
- Maestría en Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Ciudad de Mexico, Mexico
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2
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Walsh MR, Roden C. Fish (eggs) out of water: evolutionary divergence in terrestrial embryonic plasticity in Trinidadian killifish. Proc Biol Sci 2024; 291:20240083. [PMID: 38917866 DOI: 10.1098/rspb.2024.0083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Accepted: 04/29/2024] [Indexed: 06/27/2024] Open
Abstract
Externally laid eggs are often responsive to environmental cues; however, it is unclear how such plasticity evolves. In Trinidad, the killifish (Anablepsoides hartii) is found in communities with and without predators. Here, killifish inhabit shallower, ephemeral habitats in sites with predators. Such shifts may increase the exposure of eggs to air and lead to possible desiccation. We compared egg-hatching plasticity between communities by rearing eggs terrestrially on peat moss or in water. The timing of hatching did not differ between communities when eggs were reared in water. Eggs from sites with predators responded to terrestrial incubation by hatching significantly earlier compared with water-reared eggs. These responses were weaker in sites with no predators. Such divergent trends show that the presence of predators is associated with evolutionary shifts in hatching plasticity. Our results provide evidence for local adaptation in embryonic plasticity at the population scale.
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Affiliation(s)
- Matthew R Walsh
- Department of Biology, University of Texas at Arlington , Arlington, TX 76019, USA
| | - Christopher Roden
- Department of Biology, University of Texas at Arlington , Arlington, TX 76019, USA
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3
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Nikiforov-Nikishin DL, Irkha VA, Kochetkov NI, Kalita TL, Nikiforov-Nikishin AL, Blokhin EE, Antipov SS, Makarenkov DA, Zhavnerov AN, Glebova IA, Smorodinskaya SV, Chebotarev SN. Some Aspects of Development and Histological Structure of the Visual System of Nothobranchius Guentheri. Animals (Basel) 2021; 11:2755. [PMID: 34573720 PMCID: PMC8470241 DOI: 10.3390/ani11092755] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 09/17/2021] [Accepted: 09/19/2021] [Indexed: 12/04/2022] Open
Abstract
In this, work some aspects of the development of the visual system of Nothobranchius guentheri at the main stages of ontogenesis were described for the first time. It was possible to establish that the formation of the visual system occurs similarly to other representatives of the order Cyprinodontiformes, but significantly differs in terms of the individual stages of embryogenesis due to the presence of diapause. In the postembryonic period, there is a further increase in the size of the fish's eyes and head, to the proportions characteristic of adult fish. The histological structure of the eye in adult N. guentheri practically does not differ from most teleost fish living in the same environmental conditions. The study of the structure of the retina showed the heterogeneity of the thickness of the temporal and nasal areas, which indicates the predominant role of peripheral vision. Morphoanatomical measurements of the body and eyes of N. guentheri showed that their correlation was conservative. This indicates an important role of the visual system for the survival of fish in natural conditions, both for the young and adults. In individuals of the older age group, a decrease in the amount of sodium (Na) and an increase in magnesium (Mg) and calcium (Ca) were found in the eye lens. Such changes in the elemental composition of the lens can be a sign of the initial stage of cataractogenesis and disturbances in the metabolism of lens fibers as a result of aging. This allows us to propose N. guentheri as a model for studying the structure, formation, and aging of the visual and nervous systems.
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Affiliation(s)
- Dmitry L. Nikiforov-Nikishin
- Institute of Biotechnology and Fisheries, Moscow State University of Technologies and Management (FCU), 73, Zemlyanoy Val Str., 109004 Moscow, Russia; (D.L.N.-N.); (T.L.K.); (A.L.N.-N.); (A.N.Z.); (I.A.G.); (S.V.S.)
| | - Vladimir A. Irkha
- Scientific Department, Moscow State University of Technologies and Management (FCU), 73, Zemlyanoy Val Str., 109004 Moscow, Russia; (V.A.I.); (S.S.A.)
| | - Nikita I. Kochetkov
- Institute of Biotechnology and Fisheries, Moscow State University of Technologies and Management (FCU), 73, Zemlyanoy Val Str., 109004 Moscow, Russia; (D.L.N.-N.); (T.L.K.); (A.L.N.-N.); (A.N.Z.); (I.A.G.); (S.V.S.)
| | - Tatyana L. Kalita
- Institute of Biotechnology and Fisheries, Moscow State University of Technologies and Management (FCU), 73, Zemlyanoy Val Str., 109004 Moscow, Russia; (D.L.N.-N.); (T.L.K.); (A.L.N.-N.); (A.N.Z.); (I.A.G.); (S.V.S.)
| | - Alexei L. Nikiforov-Nikishin
- Institute of Biotechnology and Fisheries, Moscow State University of Technologies and Management (FCU), 73, Zemlyanoy Val Str., 109004 Moscow, Russia; (D.L.N.-N.); (T.L.K.); (A.L.N.-N.); (A.N.Z.); (I.A.G.); (S.V.S.)
| | - Eduard E. Blokhin
- Federal Research Centre the Southern Scientific Centre of the Russian Academy of Science, Chekhova Ave., 41, 344006 Rostov-on-Don, Russia;
| | - Sergei S. Antipov
- Scientific Department, Moscow State University of Technologies and Management (FCU), 73, Zemlyanoy Val Str., 109004 Moscow, Russia; (V.A.I.); (S.S.A.)
- Department of Biophysics and Biotechnology, Voronezh State University, 1, University Square, 394063 Voronezh, Russia
| | - Dmitry A. Makarenkov
- Institute of Chemical Reagents and High Purity Chemical Substances of the National Research Centre “Kurchatov Institute”, Str. Bogorodsky Val, 3, 107076 Moscow, Russia;
| | - Alexey N. Zhavnerov
- Institute of Biotechnology and Fisheries, Moscow State University of Technologies and Management (FCU), 73, Zemlyanoy Val Str., 109004 Moscow, Russia; (D.L.N.-N.); (T.L.K.); (A.L.N.-N.); (A.N.Z.); (I.A.G.); (S.V.S.)
| | - Irina A. Glebova
- Institute of Biotechnology and Fisheries, Moscow State University of Technologies and Management (FCU), 73, Zemlyanoy Val Str., 109004 Moscow, Russia; (D.L.N.-N.); (T.L.K.); (A.L.N.-N.); (A.N.Z.); (I.A.G.); (S.V.S.)
| | - Svetlana V. Smorodinskaya
- Institute of Biotechnology and Fisheries, Moscow State University of Technologies and Management (FCU), 73, Zemlyanoy Val Str., 109004 Moscow, Russia; (D.L.N.-N.); (T.L.K.); (A.L.N.-N.); (A.N.Z.); (I.A.G.); (S.V.S.)
| | - Sergei N. Chebotarev
- Management Department, Moscow State University of Technologies and Management (FCU), 73, Zemlyanoy Val Str., 109004 Moscow, Russia;
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Chalar C, Clivio G, Montagne J, Costábile A, Lima A, Papa NG, Berois N, Arezo MJ. Embryonic developmental arrest in the annual killifish Austrolebias charrua: A proteomic approach to diapause III. PLoS One 2021; 16:e0251820. [PMID: 34086690 PMCID: PMC8177498 DOI: 10.1371/journal.pone.0251820] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 05/03/2021] [Indexed: 11/18/2022] Open
Abstract
Diapause is a reversible developmental arrest faced by many organisms in harsh environments. Annual killifish present this mechanism in three possible stages of development. Killifish are freshwater teleosts from Africa and America that live in ephemeral ponds, which dry up in the dry season. The juvenile and adult populations die, and the embryos remain buried in the bottom mud until the next rainy season. Thus, species survival is entirely embryo-dependent, and they are perhaps the most remarkable extremophile organisms among vertebrates. The aim of the present study was to gather information about embryonic diapauses with the use of a "shotgun" proteomics approach in diapause III and prehatching Austrolebias charrua embryos. Our results provide insight into the molecular mechanisms of diapause III. Data are available via ProteomeXchange with identifier PXD025196. We detected a diapause-dependent change in a large group of proteins involved in different functions, such as metabolic pathways and stress tolerance, as well as proteins related to DNA repair and epigenetic modifications. Furthermore, we observed a diapause-associated switch in cytoskeletal proteins. This first glance into global protein expression differences between prehatching and diapause III could provide clues regarding the induction/maintenance of this developmental arrest in A. charrua embryos. There appears to be no single mechanism underlying diapause and the present data expand our knowledge of the molecular basis of diapause regulation. This information will be useful for future comparative approaches among different diapauses in annual killifish and/or other organisms that experience developmental arrest.
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Affiliation(s)
- Cora Chalar
- Sección Bioquímica, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Graciela Clivio
- Sección Biología Celular, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Jimena Montagne
- Sección Biología Celular, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Alicia Costábile
- Sección Bioquímica, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Analía Lima
- Unidad de Bioquímica y Proteómica Analíticas, Institut Pasteur Montevideo, Montevideo, Uruguay
- Instituto de Investigaciones Biológicas Clemente Estable, Ministerio de Educación y Cultura, Montevideo, Uruguay
| | - Nicolás G. Papa
- Laboratorio de Biología Molecular de Organismos Acuáticos, Sección Biología Celular, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Nibia Berois
- Laboratorio de Biología Molecular de Organismos Acuáticos, Sección Biología Celular, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - María José Arezo
- Laboratorio de Biología Molecular de Organismos Acuáticos, Sección Biología Celular, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
- * E-mail:
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5
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Zajic DE, Nicholson JP, Podrabsky JE. No water, no problem: stage-specific metabolic responses to dehydration stress in annual killifish embryos. J Exp Biol 2020; 223:jeb231985. [PMID: 32778566 DOI: 10.1242/jeb.231985] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 07/29/2020] [Indexed: 08/26/2023]
Abstract
Annual killifish survive in temporary ponds by producing drought-tolerant embryos that can enter metabolic dormancy (diapause). Survival of dehydration stress is achieved through severe reduction of evaporative water loss. We assessed dehydration stress tolerance in diapausing and developing Austrofundulus limnaeus embryos. We measured oxygen consumption rates under aquatic and aerial conditions to test the hypothesis that there is a trade-off between water retention and oxygen permeability. Diapausing embryos survive dehydrating conditions for over 1.5 years, and post-diapause stages can survive for over 100 days. Diapausing embryos respond to dehydration stress by increasing oxygen consumption rates while post-diapause embryos exhibit the same or reduced rates compared with aquatic embryos. Thus, water retention does not always limit oxygen diffusion. Aerial incubation coupled with hypoxia causes some embryos to arrest development. The observed stage-specific responses are consistent with an intrinsic bet-hedging strategy in embryos that would increase developmental variation in a potentially adaptive manner.
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Affiliation(s)
- Daniel E Zajic
- Department of Biology, Portland State University, PO Box 751, Portland, OR 97207, USA
- Health, Human Performance, and Athletics Department, Linfield University, 900 SE Baker, McMinnville, OR 97128, USA
| | - Jonathon P Nicholson
- Department of Biology, Portland State University, PO Box 751, Portland, OR 97207, USA
| | - Jason E Podrabsky
- Department of Biology, Portland State University, PO Box 751, Portland, OR 97207, USA
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6
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Furness AI, Reznick DN, Tatarenkov A, Avise JC. The evolution of diapause in Rivulus (Laimosemion). Zool J Linn Soc 2018. [DOI: 10.1093/zoolinnean/zly021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Andrew I Furness
- Department of Ecology and Evolutionary Biology, University of California, Irvine, Irvine, CA, USA
| | - David N Reznick
- Department of Biology, University of California, Riverside, Riverside, CA, USA
| | - Andrey Tatarenkov
- Department of Ecology and Evolutionary Biology, University of California, Irvine, Irvine, CA, USA
| | - John C Avise
- Department of Ecology and Evolutionary Biology, University of California, Irvine, Irvine, CA, USA
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7
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Martin KL, Podrabsky JE. Hit pause: Developmental arrest in annual killifishes and their close relatives. Dev Dyn 2017; 246:858-866. [DOI: 10.1002/dvdy.24507] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 04/10/2017] [Accepted: 04/10/2017] [Indexed: 02/03/2023] Open
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8
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Romney AL, Podrabsky JE. Transcriptomic analysis of maternally provisioned cues for phenotypic plasticity in the annual killifish, Austrofundulus limnaeus. EvoDevo 2017; 8:6. [PMID: 28439397 PMCID: PMC5401559 DOI: 10.1186/s13227-017-0069-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 04/14/2017] [Indexed: 12/20/2022] Open
Abstract
Background Genotype and environment can interact during development to produce novel adaptive traits that support life in extreme conditions. The development of the annual killifish Austrofundulus limnaeus is unique among vertebrates because the embryos have distinct cell movements that separate epiboly from axis formation during early development, can enter into a state of metabolic dormancy known as diapause and can survive extreme environmental conditions. The ability to enter into diapause can be maternally programmed, with young females producing embryos that do not enter into diapause. Alternately, embryos can be programmed to “escape” from diapause and develop directly by both maternal factors and embryonic incubation conditions. Thus, maternally packaged gene products are hypothesized to regulate developmental trajectory and perhaps the other unique developmental characters in this species. Results Using high-throughput RNA sequencing, we generated transcriptomic profiles of mRNAs, long non-coding RNAs and small non-coding RNAs (sncRNAs) in 1–2 cell stage embryos of A. limnaeus. Transcriptomic analyses suggest maternal programming of embryos through alternatively spliced mRNAs and antisense sncRNAs. Comparison of these results to those of comparable studies on zebrafish and other fishes reveals a surprisingly high abundance of transcripts involved in the cellular response to stress and a relatively lower expression of genes required for rapid transition through the cell cycle. Conclusions Maternal programming of developmental trajectory is unlikely accomplished by differential expression of diapause-specific genes. Rather, evidence suggests a role for trajectory-specific splice variants of genes expressed in both phenotypes. In addition, based on comparative studies with zebrafish, the A. limnaeus 1–2 cell stage transcriptome is unique in ways that are consistent with their unique life history. These results not only impact our understanding of the genetic mechanisms that regulate entrance into diapause, but also provide insight into the epigenetic regulation of gene expression during development. Electronic supplementary material The online version of this article (doi:10.1186/s13227-017-0069-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Amie L Romney
- Department of Biology, Portland State University, P.O. Box 751, Portland, OR 97207 USA
| | - Jason E Podrabsky
- Department of Biology, Portland State University, P.O. Box 751, Portland, OR 97207 USA
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9
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Cerdà J, Chauvigné F, Finn RN. The Physiological Role and Regulation of Aquaporins in Teleost Germ Cells. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 969:149-171. [DOI: 10.1007/978-94-024-1057-0_10] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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10
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Domínguez-Castanedo O, Uribe MC, Rosales-Torres AM. Morphological development of the structures related to annualism in the ovarian follicle of the killifishMillerichthys robustus(Costa,1995) (Teleostei: Cyprinodontiformes). J Morphol 2016; 277:1219-30. [DOI: 10.1002/jmor.20570] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Revised: 05/16/2016] [Accepted: 05/26/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Omar Domínguez-Castanedo
- Programa de Doctorado en Ciencias Biológicas y de la Salud; Universidad Autónoma Metropolitana; Unidad Xochimilco México
| | - Mari Carmen Uribe
- Laboratorio de Biología de la Reproducción, Depto de Biología Comparada, Facultad de Ciencias; Universidad Nacional Autónoma de México; Coyoacán México
| | - Ana María Rosales-Torres
- Laboratorio Bioquímica de la Reproducción, Depto. de Producción Agrícola y Animal; Universidad Autónoma Metropolitana-Xochimilco; Coyoacán México
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11
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Hand SC, Denlinger DL, Podrabsky JE, Roy R. Mechanisms of animal diapause: recent developments from nematodes, crustaceans, insects, and fish. Am J Physiol Regul Integr Comp Physiol 2016; 310:R1193-211. [PMID: 27053646 PMCID: PMC4935499 DOI: 10.1152/ajpregu.00250.2015] [Citation(s) in RCA: 140] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Accepted: 03/11/2016] [Indexed: 01/22/2023]
Abstract
Life cycle delays are beneficial for opportunistic species encountering suboptimal environments. Many animals display a programmed arrest of development (diapause) at some stage(s) of their development, and the diapause state may or may not be associated with some degree of metabolic depression. In this review, we will evaluate current advancements in our understanding of the mechanisms responsible for the remarkable phenotype, as well as environmental cues that signal entry and termination of the state. The developmental stage at which diapause occurs dictates and constrains the mechanisms governing diapause. Considerable progress has been made in clarifying proximal mechanisms of metabolic arrest and the signaling pathways like insulin/Foxo that control gene expression patterns. Overlapping themes are also seen in mechanisms that control cell cycle arrest. Evidence is emerging for epigenetic contributions to diapause regulation via small RNAs in nematodes, crustaceans, insects, and fish. Knockdown of circadian clock genes in selected insect species supports the importance of clock genes in the photoperiodic response that cues diapause. A large suite of chaperone-like proteins, expressed during diapause, protects biological structures during long periods of energy-limited stasis. More information is needed to paint a complete picture of how environmental cues are coupled to the signal transduction that initiates the complex diapause phenotype, as well as molecular explanations for how the state is terminated. Excellent examples of molecular memory in post-dauer animals have been documented in Caenorhabditis elegans It is clear that a single suite of mechanisms does not regulate diapause across all species and developmental stages.
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Affiliation(s)
- Steven C Hand
- Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana;
| | - David L Denlinger
- Departments of Entomology and Evolution, Ecology and Organismal Biology, Ohio State University, Columbus, Ohio
| | - Jason E Podrabsky
- Department of Biology, Portland State University, Portland, Oregon; and
| | - Richard Roy
- Department of Biology, McGill University, Montréal, Québec, Canada
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12
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Furness AI, Reznick DN, Springer MS, Meredith RW. Convergent evolution of alternative developmental trajectories associated with diapause in African and South American killifish. Proc Biol Sci 2016; 282:rspb.2014.2189. [PMID: 25631993 DOI: 10.1098/rspb.2014.2189] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Annual killifish adapted to life in seasonally ephemeral water-bodies exhibit desiccation resistant eggs that can undergo diapause, a period of developmental arrest, enabling them to traverse the otherwise inhospitable dry season. Environmental cues that potentially indicate the season can govern whether eggs enter a stage of diapause mid-way through development or skip this diapause and instead undergo direct development. We report, based on construction of a supermatrix phylogenetic tree of the order Cyprinodontiformes and a battery of comparative analyses, that the ability to produce diapause eggs evolved independently at least six times within African and South American killifish. We then show in species representative of these lineages that embryos entering diapause display significant reduction in development of the cranial region and circulatory system relative to direct-developing embryos. This divergence along alternative developmental pathways begins mid-way through development, well before diapause is entered, during a period of purported maximum developmental constraint (the phylotypic period). Finally, we show that entering diapause is accompanied by a dramatic reduction in metabolic rate and concomitant increase in long-term embryo survival. Morphological divergence during the phylotypic period thus allows embryos undergoing diapause to conserve energy by shunting resources away from energetically costly organs thereby increasing survival chances in an environment that necessitates remaining dormant, buried in the soil and surrounded by an eggshell for much of the year. Our results indicate that adaptation to seasonal aquatic environments in annual killifish imposes strong selection during the embryo stage leading to marked diversification during this otherwise conserved period of vertebrate development.
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Affiliation(s)
- Andrew I Furness
- Department of Biology, University of California, Riverside, CA 92521, USA
| | - David N Reznick
- Department of Biology, University of California, Riverside, CA 92521, USA
| | - Mark S Springer
- Department of Biology, University of California, Riverside, CA 92521, USA
| | - Robert W Meredith
- Department of Biology and Molecular Biology, Montclair State University, Montclair, NJ 07043, USA
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13
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Furness AI. The evolution of an annual life cycle in killifish: adaptation to ephemeral aquatic environments through embryonic diapause. Biol Rev Camb Philos Soc 2015; 91:796-812. [DOI: 10.1111/brv.12194] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 04/13/2015] [Accepted: 04/22/2015] [Indexed: 02/01/2023]
Affiliation(s)
- Andrew I. Furness
- Department of Biology; University of California; Riverside CA 92521 U.S.A
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14
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Furness AI, Lee K, Reznick DN. Adaptation in a variable environment: Phenotypic plasticity and bet-hedging during egg diapause and hatching in an annual killifish. Evolution 2015; 69:1461-1475. [DOI: 10.1111/evo.12669] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Accepted: 04/10/2015] [Indexed: 01/19/2023]
Affiliation(s)
- Andrew I. Furness
- Department of Biology; University of California; Riverside California 92521
| | - Kevin Lee
- Department of Biology; University of California; Riverside California 92521
| | - David N. Reznick
- Department of Biology; University of California; Riverside California 92521
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15
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Johansson J, Kristensen NP, Nilsson JÅ, Jonzén N. The eco-evolutionary consequences of interspecific phenological asynchrony - a theoretical perspective. OIKOS 2014. [DOI: 10.1111/oik.01909] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Jacob Johansson
- Dept of Biology, Ecology Building; Lund Univ.; SE-22362 Lund Sweden
| | | | - Jan-Åke Nilsson
- Dept of Biology, Ecology Building; Lund Univ.; SE-22362 Lund Sweden
| | - Niclas Jonzén
- Dept of Biology, Ecology Building; Lund Univ.; SE-22362 Lund Sweden
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16
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Brown CA, Green CC. Metabolic and embryonic responses to terrestrial incubation of Fundulus grandis embryos across a temperature gradient. JOURNAL OF FISH BIOLOGY 2014; 84:732-747. [PMID: 24588641 DOI: 10.1111/jfb.12348] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Revised: 01/16/2014] [Accepted: 01/16/2014] [Indexed: 06/03/2023]
Abstract
This study simulated terrestrial incubation and measured rates of embryogenesis, nitrogen elimination, heart rate, lactate production, maximum length of time a hatch could be delayed and developmental responses of terrestrially incubated Gulf killifish Fundulus grandis embryos at temperatures ranging from 20 to 30° C. Temperature had a positive relationship with rate of embryogenesis, but a negative relationship with extent of extended incubation. The 30° C treatment reached embryonic maturity 6 days before the 20° C treatment. Embryos hatched between intervals of 240 and 336, 144 and 288, 96 and 240 and 96 and 192 h after reaching developmental maturity for the 20, 23, 26 and 30° C treatments. Significantly higher concentrations of total nitrogen, in the form of ammonia and urea, were recorded in the 20 and 30° C treatments. While temperature significantly influenced lactate and ATP concentrations, no significant influence of time of incubation was detected. Terrestrial embryos displayed an ability to develop quickly during embryogenesis and prolong incubation for an extended period of time after reaching embryonic maturity. This adaptation may be a life-history trait used to minimize asynchronous hatching, cannibalism and cohort size heterogeneity.
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Affiliation(s)
- C A Brown
- Louisiana State University Agricultural Center, Aquaculture Research Station, 2410 Ben Hur Road, Baton Rouge, LA 70820, U.S.A
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The effects of hypoxia and temperature on metabolic aspects of embryonic development in the annual killifish Austrofundulus limnaeus. J Comp Physiol B 2014; 184:355-70. [PMID: 24510219 DOI: 10.1007/s00360-014-0803-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Revised: 12/30/2013] [Accepted: 01/13/2014] [Indexed: 10/25/2022]
Abstract
Embryos of Austrofundulus limnaeus are exceptional in their ability to tolerate prolonged bouts of complete anoxia. Hypoxia and anoxia are a normal part of their developmental environment. Here, we exposed embryos to a range of PO2 levels at two different temperatures (25 and 30 °C) to study the combined effects of reduced oxygen and increased temperature on developmental rate, heart rate, and metabolic enzyme capacity. Hypoxia decreased overall developmental rate and caused a stage-specific decline in heart rate. However, the rate of early development prior to the onset of organogenesis is insensitive to PO2. Increased incubation temperature caused an increase in the developmental rate at high PO2s, but hindered developmental progression under severe hypoxia. Embryonic DNA content in pre-hatching embryos was positively correlated with PO2. Citrate synthase, lactate dehydrogenase, and phosphoenolpyruvate carboxykinase capacity were all reduced in embryos developing under hypoxic conditions. Embryos of A. limnaeus are able to develop normally across a wide range of PO2s and contrary to most other vertebrates severe hypoxia is not a teratogen. Embryos of A. limnaeus do not respond to hypoxia through an increase in the capacity for enzymatic activity of the metabolic enzymes lactate dehydrogenase, citrate synthase, or phosphoenolpyruvate carboxykinase. Instead they appear to adjust whole-embryo metabolic capacity to match oxygen availability. However, decreased DNA content in hypoxia-reared embryos suggests that cellular enzymatic capacity may remain unchanged in response to hypoxia, and the reduced capacity may rather indicate reduced cell number in hypoxic embryos.
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Tingaud-Sequeira A, Lozano JJ, Zapater C, Otero D, Kube M, Reinhardt R, Cerdà J. A rapid transcriptome response is associated with desiccation resistance in aerially-exposed killifish embryos. PLoS One 2013; 8:e64410. [PMID: 23741328 PMCID: PMC3669298 DOI: 10.1371/journal.pone.0064410] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Accepted: 04/12/2013] [Indexed: 11/21/2022] Open
Abstract
Delayed hatching is a form of dormancy evolved in some amphibian and fish embryos to cope with environmental conditions transiently hostile to the survival of hatchlings or larvae. While diapause and cryptobiosis have been extensively studied in several animals, very little is known concerning the molecular mechanisms involved in the sensing and response of fish embryos to environmental cues. Embryos of the euryhaline killifish Fundulus heteroclitus advance dvelopment when exposed to air but hatching is suspended until flooding with seawater. Here, we investigated how transcriptome regulation underpins this adaptive response by examining changes in gene expression profiles of aerially incubated killifish embryos at ∼100% relative humidity, compared to embryos continuously flooded in water. The results confirm that mid-gastrula embryos are able to stimulate development in response to aerial incubation, which is accompanied by the differential expression of at least 806 distinct genes during a 24 h period. Most of these genes (∼70%) appear to be differentially expressed within 3 h of aerial exposure, suggesting a broad and rapid transcriptomic response. This response seems to include an early sensing phase, which overlaps with a tissue remodeling and activation of embryonic development phase involving many regulatory and metabolic pathways. Interestingly, we found fast (0.5–1 h) transcriptional differences in representatives of classical “stress” proteins, such as some molecular chaperones, members of signalling pathways typically involved in the transduction of sensor signals to stress response genes, and oxidative stress-related proteins, similar to that described in other animals undergoing dormancy, diapause or desiccation. To our knowledge, these data represent the first transcriptional profiling of molecular processes associated with desiccation resistance during delayed hatching in non-mammalian vertebrates. The exceptional transcriptomic plasticity observed in killifish embryos provides an important insight as to how the embryos are able to rapidly adapt to non-lethal desiccation conditions.
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Affiliation(s)
- Angèle Tingaud-Sequeira
- Institut de Recerca i Tecnologia Agroalimentàries (IRTA)-Institut de Ciències del Mar, CSIC, Barcelona, Spain
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Berois N, Arezo MJ, Papa NG, Clivio GA. Annual fish: developmental adaptations for an extreme environment. WILEY INTERDISCIPLINARY REVIEWS-DEVELOPMENTAL BIOLOGY 2012; 1:595-602. [PMID: 23801535 DOI: 10.1002/wdev.39] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Annual fish are freshwater teleosts found in South America and Africa that are exposed to an extremely variable environment. They develop and reproduce in seasonal ponds that dry during the summer eliminating the entire adult population. Remarkably, desiccation-resistant embryos survive in these dry ponds that hatch during the next rainy season when the ponds are recreated. Among vertebrates, they represent one of the most remarkable extremophiles. They share several features with other fish models; however, they exhibit unique traits related to their peculiar life cycle. Epiboly is temporally and spatially uncoupled from organogenesis, and the embryos can undergo reversible developmental arrests (diapauses). These attributes make them a useful model to study diverse topics in developmental biology using a comparative and evolutionary approach. In this article, different aspects related to annual fish biology, taxonomy and phylogenetic considerations, reproductive strategy, and developmental characteristics with special focus on arrests, are summarized. The current challenge is to document and determine the factors that generate such high diversity and unique adaptations of annual fish. To understand this complexity, interdisciplinary approaches are being employed taking into consideration evolutionary biology, ethology, reproductive strategies, regulation of developmental mechanisms, and senescence.
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Affiliation(s)
- Nibia Berois
- Sección Biología Celular, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay.
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