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All-triploid offspring in the yellowtail tetra Astyanax altiparanae Garutti & Britski 2000 (Teleostei, Characidae) derived from female tetraploid × male diploid crosses. ZYGOTE 2023; 31:123-128. [PMID: 36617988 DOI: 10.1017/s0967199422000569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
This study aimed to evaluate the ploidy and survival of larvae resulting from crosses between tetraploid females and diploid males of yellowtail tetra Astyanax altiparanae, both females (three diploids and three tetraploids) and males (n = 3 diploids). Breeders were subjected to hormonal induction with pituitary gland extract from common carp fish (Cyprinus carpio). Females received two doses at concentrations of 0.3 and 3.0 mg/kg -1 body weight and at intervals of 6 h. Males were induced with a single dose of 3.0 mg/kg -1 applied simultaneously with the second dose in females. Oocytes from each diploid and tetraploid female were fertilized with semen from the same male, resulting in two crosses: cross 1 (diploid male and diploid female) and cross 2 (diploid male and tetraploid female). The procedures were performed with separate females (diploid and tetraploid) and diploid males for each repetition (n = 3). For ploidy determination, 60 larvae from each treatment were analyzed using flow cytometry and cytogenetic analyses. As expected, flow cytometry analysis showed that progenies from crosses 1 and 2 presented diploid and triploid individuals, respectively, with a 100% success rate. The same results were confirmed in the cytogenetic analysis, in which the larvae resulting from cross 1 had 50 metaphase chromosomes and those from cross 2 had 75 chromosomes. The oocytes have a slightly ovoid shape at the time of extrusion. Diploid oocytes had a size of 559 ± 20.62 μm and tetraploid of 1025.33 ± 30.91 μm. Statistical differences were observed between eggs from crosses 1 and 2 (P = 0.0130). No significant differences between treatments were observed for survival at the 2-cell stage (P = 0.6174), blastula (P = 0.9717), gastrula (P = 0.5301), somite (P = 0.3811), and hatching (P = 0.0984) stages. In conclusion, our results showed that tetraploid females of the yellowtail tetra A. altiparanae are fertile, present viable gametes after stripping and fertilization using the 'dry method', and may be used for mass production of triploids. This is the first report of these procedures within neotropical characins, and which can be applied in other related species of economic importance.
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Yasui GS, Ferreira do Nascimento N, Pereira-Santos M, dos Santos Silva AP, Coelho GCZ, Visintin JA, Porto-Foresti F, Okada Nakaghi LS, Vianna NC, Carvalho GB, Monzani PS, López LS, Senhorini JA. Establishing a model fish for the Neotropical region: The case of the yellowtail tetra Astyanax altiparanae in advanced biotechnology. Front Genet 2022; 13:903990. [PMID: 36531235 PMCID: PMC9749136 DOI: 10.3389/fgene.2022.903990] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 09/09/2022] [Indexed: 12/14/2023] Open
Abstract
The use of model organisms is important for basic and applied sciences. Several laboratory species of fishes are used to develop advanced technologies, such as the zebrafish (Danio rerio), the medaka (Oryzias latipes), and loach species (Misgurnus spp.). However, the application of these exotic species in the Neotropical region is limited due to differences in environmental conditions and phylogenetic distances. This situation emphasizes the establishment of a model organism specifically for the Neotropical region with the development of techniques that may be applicable to other Neotropical fish species. In this work, the previous research efforts are described in order to establish the yellowtail tetra Astyanax altiparanae as a model laboratory species for both laboratory and aquaculture purposes. Over the last decade, starting with artificial fertilization, the yellowtail tetra has become a laboratory organism for advanced biotechnology, such as germ cell transplantation, chromosome set manipulation, and other technologies, with applications in aquaculture and conservation of genetic resources. Nowadays, the yellowtail tetra is considered the most advanced fish with respect to fish biotechnology within the Neotropical region. The techniques developed for this species are being used in other related species, especially within the characins class.
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Affiliation(s)
- George Shigueki Yasui
- Laboratory of Fish Biotechnology, National Center for Research and Conservation of Continental Fish, Chico Mendes Institute of Biodiversity Conservation, Brasília, Brazil
- Department of Animal Reproduction, Faculty of Veterinary Medicine, University of São Paulo, São Paulo, Brazil
- Peixetec Biotecnologia Em Organismos Aquáticos LTDA, São Paulo, Brazil
- Graduate Course of Biological Sciences (Zoology), São Paulo State University, São Paulo, Brazil
| | | | - Matheus Pereira-Santos
- Federal Rural University of Rio de Janeiro, Animal Science Graduate Program, Seropédica, Brazil
| | - Amanda Pereira dos Santos Silva
- Laboratory of Fish Biotechnology, National Center for Research and Conservation of Continental Fish, Chico Mendes Institute of Biodiversity Conservation, Brasília, Brazil
- Graduate Course of Biological Sciences (Zoology), São Paulo State University, São Paulo, Brazil
| | - Geovanna Carla Zacheo Coelho
- Laboratory of Fish Biotechnology, National Center for Research and Conservation of Continental Fish, Chico Mendes Institute of Biodiversity Conservation, Brasília, Brazil
- Graduate Course of Biological Sciences (Zoology), São Paulo State University, São Paulo, Brazil
| | - José Antônio Visintin
- Department of Animal Reproduction, Faculty of Veterinary Medicine, University of São Paulo, São Paulo, Brazil
| | - Fábio Porto-Foresti
- Department of Biological Sciences, São Paulo State University, São Paulo, Brazil
| | | | | | - Gabriela Braga Carvalho
- Laboratory of Fish Biotechnology, National Center for Research and Conservation of Continental Fish, Chico Mendes Institute of Biodiversity Conservation, Brasília, Brazil
- Department of Animal Reproduction, Faculty of Veterinary Medicine, University of São Paulo, São Paulo, Brazil
| | - Paulo Sérgio Monzani
- Laboratory of Fish Biotechnology, National Center for Research and Conservation of Continental Fish, Chico Mendes Institute of Biodiversity Conservation, Brasília, Brazil
- Graduate Course of Biological Sciences (Zoology), São Paulo State University, São Paulo, Brazil
| | - Lucia Suárez López
- Laboratory of Fish Biotechnology, National Center for Research and Conservation of Continental Fish, Chico Mendes Institute of Biodiversity Conservation, Brasília, Brazil
- Graduate Course of Biological Sciences (Zoology), São Paulo State University, São Paulo, Brazil
| | - José Augusto Senhorini
- Laboratory of Fish Biotechnology, National Center for Research and Conservation of Continental Fish, Chico Mendes Institute of Biodiversity Conservation, Brasília, Brazil
- Peixetec Biotecnologia Em Organismos Aquáticos LTDA, São Paulo, Brazil
- Graduate Course of Biological Sciences (Zoology), São Paulo State University, São Paulo, Brazil
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Morphological description of gametes in cave and surface populations of Astyanax mexicanus (De Filippi, 1853). ZYGOTE 2022; 30:719-729. [PMID: 35730544 DOI: 10.1017/s0967199422000223] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The Mexican tetra Astyanax mexicanus presents two contrasting morphs, a widely distributed surface morph and a cave-adapted morph. These cave-adapted morphs have evolved independently from two different lineages (i.e. 'old' and 'new' lineages); therefore, this model system gives a unique opportunity to explore parallel adaptive evolution in biological traits. The present study corresponds to the first morphological description of the Astyanax mexicanus maturation process of the spermatozoa and oocytes, using thermal and hormonal stimuli to promote spermatogenesis and oogenesis, considering surface and cave morphs from both lineages. We corroborate the relevance of thermal and hormonal stimuli to promote gamete maturation. The hormone Ovaprim (GnRHa + Domperidone) is an effective promoter of ovarian development, maturation end in oocytes and spawning in Astyanax mexicanus. The sperm morphology of Astyanax mexicanus includes the sperm head, the midpiece, and tail or flagellum. We found differences in the spermatozoan total length between environments (F = 9.929, P = 0.05) and linages (F = 49.86, P = 0.005). The oocytes showed a spherical conformation with a mean diameter of 822.4 ± 194.1 μm for the surface populations, and 604.6 ± 38.3 µm for the cave populations. The oocyte chorion presents ridges and grooves that are arranged radially towards the micropyle. A plug in the micropyle zone was observed after fertilization, confirmed by the outer membrane of the chorion, which provides some weak adhesiveness to the substrate. We observed differences in chorion thickness between the contrasting environmental conditions. This is the first morphological characterization of the Sótanos Vázquez, Escondido and Tigre, which previous to this study were only known from speleological expeditions, with no previous biological information available.
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da Silva J, Brambila-Souza G, Araujo DDM, Moreira RG. Effects of vitamin A supplementation on ovarian development of Astyanax lacustris (Teleostei: Characidae) during the non-breeding season. Comp Biochem Physiol A Mol Integr Physiol 2021; 265:111132. [PMID: 34968658 DOI: 10.1016/j.cbpa.2021.111132] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 12/11/2021] [Accepted: 12/21/2021] [Indexed: 12/28/2022]
Abstract
Vitamin A (VA) is essential for fish reproduction, however, knowledge of VA requirement of broodstock fish is scarce. We investigated the physiological role of VA supplementation in the ovarian maturation of Astyanax lacustris throughout the non-breeding season. Adult females were distributed in five nutritional treatments, which differed by the amount of VA supplemented in a plant-based diet: T1 = 0, T2 = 1800, T3 = 3600, T4 = 7200, and T5 = 14,400 IU kg-1 of VA for 60 days after a period of 16 days feeding on a diet poor in VA to reduce body VA content. Plasma total lipids (TL), lipoproteins, and 17β-estradiol (E2) levels were measured after 30 and 60 days. Somatic indexes and morphophysiological ovarian parameters were calculated and VA concentration was analyzed in the ovaries and liver after 60 days. VA supplementation did not increase the concentration of this nutrient in the liver and ovaries. E2 plasma level increased in animals fed on 3600 IU kg-1 of VA (T3) after 60 days and females from T5 group presented a higher RF after 60 days. Ovarian development increased after 60 days compared to that after 30 days, confirmed by the higher gonadosomatic index (all groups). The supplementation with the highest VA level increased RF and decreased plasma TL (after 30 days) and low-density lipoprotein (LDL) (after 60 days) concentrations, showing a potential to improve reproduction even during the non-breeding season; however, its nutritional requirements of VA could be higher.
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Affiliation(s)
- Joseane da Silva
- UNESP - Universidade Estadual Paulista - Centro de Aquicultura (CAUNESP), Jaboticabal, SP, Brazil
| | - Gabriela Brambila-Souza
- UNESP - Universidade Estadual Paulista - Centro de Aquicultura (CAUNESP), Jaboticabal, SP, Brazil
| | - Daniel de Magalhães Araujo
- Departamento de Gestão Agropecuária, Instituto Federal de Alagoas, Campus Satuba, Rua 17 de Agosto S/N, Zona Rural, 57120-000 Satuba, AL, Brazil
| | - Renata G Moreira
- Departamento de Fisiologia, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, Trav.14, n° 321, 05508-090 São Paulo, SP, Brazil.
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Postingel Quirino P, da Silva Rodrigues M, da Silva Cabral EM, de Siqueira-Silva DH, Mori RH, Butzge AJ, Nóbrega RH, Ninhaus-Silveira A, Veríssimo-Silveira R. The influence of increased water temperature on the duration of spermatogenesis in a neotropical fish, Astyanax altiparanae (Characiformes, Characidae). FISH PHYSIOLOGY AND BIOCHEMISTRY 2021; 47:747-755. [PMID: 32889598 DOI: 10.1007/s10695-020-00869-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 08/28/2020] [Indexed: 06/11/2023]
Abstract
In view of the established climate change scenario and the consequent changes in global temperature, it is essential to study its effects on animal spermatogenesis. Therefore, the aim of this study was to verify the duration of spermatogenesis at different temperatures. For this purpose, 96 male and adult specimens of Astyanax altiparanae were kept in a closed circulation system with water temperature stabilized at 27 °C and 32 °C. Subsequently, the specimens received pulses of BrdU (bromodeoxyuridine) at a concentration of 100 mg/kg/day for 2 consecutive days, and the samples were collected daily for a period of 15 days. Their testes were removed, fixed, processed in historesin, and sectioned in 3 μm, submitted to hematoxylin/eosin staining and to bromodeoxyuridine immunodetection. Partial results of the optimum temperature experiments allowed the classification of A. altiparanae spermatogenic cells in Aund, Adiff, and type B spermatogonia, spermatocytes, spermatids, and spermatozoa. The duration of spermatogenesis was determined as approximately 6 days for animals at a temperature of 27 °C and 1 day for animals at 32 °C. The elevated temperature was also responsible for increasing cell proliferation, resulting in an increase in the number of spermatocytes, spermatids, spermatozoa, and cell death (cell pyknotic). The duration of spermatogenesis in A. altiparanae was directly affected by the elevated water temperature, causing a reduction in the estimated time of spermatogenesis.
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Affiliation(s)
- Patricia Postingel Quirino
- Departamento de Biologia e Zootecnia. L.I.NEO - Laboratory of Neotropical Ichthyology, UNESP - Universidade Estadual Paulista "Júlio de Mesquita Filho", Câmpus de Ilha Solteira, Rua Monção, n 226, 15385-000, Ilha Solteira, São Paulo, Brazil.
- Programa de Pós-Graduação em Ciências Biológicas (Zoologia), Instituto de Biociências de Botucatu (UNESP - IBB), R. Prof. Dr. Antonio Celso Wagner Zanin, 250, 18618-689, Botucatu, São Paulo, Brazil.
| | - Maira da Silva Rodrigues
- Departamento de Biologia e Zootecnia. L.I.NEO - Laboratory of Neotropical Ichthyology, UNESP - Universidade Estadual Paulista "Júlio de Mesquita Filho", Câmpus de Ilha Solteira, Rua Monção, n 226, 15385-000, Ilha Solteira, São Paulo, Brazil
| | - Elis Marina da Silva Cabral
- Departamento de Biologia e Zootecnia. L.I.NEO - Laboratory of Neotropical Ichthyology, UNESP - Universidade Estadual Paulista "Júlio de Mesquita Filho", Câmpus de Ilha Solteira, Rua Monção, n 226, 15385-000, Ilha Solteira, São Paulo, Brazil
| | - Diógenes Henrique de Siqueira-Silva
- Instituto de Estudo em Saúde e Biologicas (IESB), Research Group of Reproduction on Amazon Fish (GERPA/LaNec), UNIFESSPA - Universidade Federal do Sul e Sudeste do Para, Folha 31, Quadra 07, Lote especial s/n, 68.507-590, Marabá, Brazil
| | - Ricardo Hideo Mori
- Departamento de Biologia e Zootecnia. L.I.NEO - Laboratory of Neotropical Ichthyology, UNESP - Universidade Estadual Paulista "Júlio de Mesquita Filho", Câmpus de Ilha Solteira, Rua Monção, n 226, 15385-000, Ilha Solteira, São Paulo, Brazil
| | - Arno Juliano Butzge
- Departamento de Morfologia, Reproductive and Molecular Biology Group, UNESP - Universidade Estadual Paulista "Júlio de Mesquita Filho", Câmpus de Botucatu, Instituto de Biociências de Botucatu, R. Prof.Dr. Antonio Celso Wagner Zanin, 250, 18618-689, Botucatu, São Paulo, Brazil
| | - Rafael Henrique Nóbrega
- Departamento de Morfologia, Reproductive and Molecular Biology Group, UNESP - Universidade Estadual Paulista "Júlio de Mesquita Filho", Câmpus de Botucatu, Instituto de Biociências de Botucatu, R. Prof.Dr. Antonio Celso Wagner Zanin, 250, 18618-689, Botucatu, São Paulo, Brazil
| | - Alexandre Ninhaus-Silveira
- Departamento de Biologia e Zootecnia. L.I.NEO - Laboratory of Neotropical Ichthyology, UNESP - Universidade Estadual Paulista "Júlio de Mesquita Filho", Câmpus de Ilha Solteira, Rua Monção, n 226, 15385-000, Ilha Solteira, São Paulo, Brazil
| | - Rosicleire Veríssimo-Silveira
- Departamento de Biologia e Zootecnia. L.I.NEO - Laboratory of Neotropical Ichthyology, UNESP - Universidade Estadual Paulista "Júlio de Mesquita Filho", Câmpus de Ilha Solteira, Rua Monção, n 226, 15385-000, Ilha Solteira, São Paulo, Brazil.
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Influence of temperature on larval ontogenesis of Geophagus brasiliensis (Quoy & Gaimard, 1824) (Pisces: Cichlidae). ZYGOTE 2021; 29:484-489. [PMID: 33829977 DOI: 10.1017/s096719942100023x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Studies on the larval development of fish are essential for conservation and improvements in cultivation techniques. Geophagus brasiliensis popularly known as Cará has potential as a fish of interest in ornamental aquaculture. Wild adults of G. brasiliensis were kept in an aquarium for spontaneous reproduction. Newly hatched larvae were transferred to 5-litre aquaria at 22, 26 and 30°C until total yolk sac resorption. Histological slides were used for biometric analysis and monitoring of larval ontogenesis at different temperatures. Histologically, from the first to the fourth days it was possible to identify myomeres, optic vesicle, yolk syncytial layer, brain, heart and differentiation of the eye layers. From the fourth to the seventh days, it was possible to identify mandibular and gill cartilages, swim bladder, liver, prismatic epithelium with striated border in intestine and renal epithelium. All biometric measurements increased over the days, except height and length of the yolk sac, which gradually decreased until the complete resorption of the yolk sac that occurred on the fifth day at a temperature of 30°C, the sixth day at 26°C and the seventh day at 22°C. Morphological events at 30°C such as the reabsorption of the yolk sac, the appearance of cartilage in the branchial arches and differentiation of the layers of the eyes occurred faster compared with the other temperatures tested. Opening of the mouth and digestive tract occurred at a similar time on the fourth day in all temperatures.
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Pinheiro JPS, Lima J, Assis CBD, Branco GS, Gomes AD, Moreira RG. Paternal exposure to aluminum, acidity, and temperature affect fatty acid seminal profile, embryonic and larval development of Astyanax altiparanae. CHEMOSPHERE 2021; 266:128935. [PMID: 33220983 DOI: 10.1016/j.chemosphere.2020.128935] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 11/04/2020] [Accepted: 11/08/2020] [Indexed: 06/11/2023]
Abstract
We investigated the effects of water acidity, temperature, and aluminum (Al) on the fatty acid (FA) seminal profile, reproductive parameters (fertilization and hatching) and embryonic development of Astyanax altiparanae. We treated males with different experimental treatments, corresponding to the combination of water temperature (20 °C; 25 °C), pH (neutral - 7.0; acidic - 5.5), and the absence or presence of Al (0.5 mg L-1). After 96 h, we analyzed the FA profile of semen and performed artificial fertilization in activating medium with neutral pH or activating medium in the same experimental conditions of the males (neutral pH, acidic pH, and Al) to evaluate fertilization and hatching rates and to monitor embryonic development. Polyunsaturated FA percentage decreased in semen of fish from the neutral group, while monounsaturated FA increased in all groups maintained at 20 °C compared to 25 °C. Aluminum exposure decreased the percentage of C20:4n6 and increased the percentage of C22:5n3 at 20 °C. Males exposed to acidic pH and Al showed lower fertilization and hatching rates, as well as increased mortality of embryos and larvae. Moreover, Al favoured a higher percentage of abnormal larvae. Fertilization in Al activating medium harmed the embryos and larvae since fertilization and hatching rates decreased. Finally, temperature influenced fertilization time, hatching rate, and the morphology of embryos and larvae. Males exposed to Al had lower fertilizing capacity, which negatively affected the embryonic development of the species. Furthermore, Al activating medium reduced the number of fertilized oocytes, hatched embryos, and normal larvae. All events were temperature dependent.
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Affiliation(s)
- João Paulo Silva Pinheiro
- Universidade de São Paulo, Instituto de Biociências, Departamento de Fisiologia, Laboratory of Metabolism and Reproduction of Aquatic Organisms - LAMEROA, Matão Street, 14 Lane, Number 101, Room 220, Cidade Universitária, São Paulo, SP, Brazil.
| | - Jennifer Lima
- Universidade de São Paulo, Instituto de Biociências, Departamento de Fisiologia, Laboratory of Metabolism and Reproduction of Aquatic Organisms - LAMEROA, Matão Street, 14 Lane, Number 101, Room 220, Cidade Universitária, São Paulo, SP, Brazil.
| | - Cecília Bertacini de Assis
- Universidade de São Paulo, Instituto de Biociências, Departamento de Fisiologia, Laboratory of Metabolism and Reproduction of Aquatic Organisms - LAMEROA, Matão Street, 14 Lane, Number 101, Room 220, Cidade Universitária, São Paulo, SP, Brazil.
| | - Giovana Souza Branco
- Universidade de São Paulo, Instituto de Biociências, Departamento de Fisiologia, Laboratory of Metabolism and Reproduction of Aquatic Organisms - LAMEROA, Matão Street, 14 Lane, Number 101, Room 220, Cidade Universitária, São Paulo, SP, Brazil.
| | - Aline Dal'Olio Gomes
- Universidade de São Paulo, Instituto de Biociências, Departamento de Fisiologia, Laboratory of Metabolism and Reproduction of Aquatic Organisms - LAMEROA, Matão Street, 14 Lane, Number 101, Room 220, Cidade Universitária, São Paulo, SP, Brazil.
| | - Renata Guimarães Moreira
- Universidade de São Paulo, Instituto de Biociências, Departamento de Fisiologia, Laboratory of Metabolism and Reproduction of Aquatic Organisms - LAMEROA, Matão Street, 14 Lane, Number 101, Room 220, Cidade Universitária, São Paulo, SP, Brazil.
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Embryonic development of the fire-eye-tetra Moenkhausia oligolepis (Characiformes: Characidae). ZYGOTE 2021; 29:194-198. [PMID: 33433308 DOI: 10.1017/s0967199420000647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This study describes the embryonic development of Moenkhausia oligolepis in laboratory conditions. After fertilization, the embryos were collected every 10 min up to 2 h, then every 20 min up to 4 h, and afterwards every 30 min until hatching. The fertilized eggs of M. oligolepis measured approximately 0.85 ± 0.5 mm and had an adhesive surface. Embryonic development lasted 14 h at 25ºC through the zygote, cleavage, blastula, gastrula, neurula, and segmentation phases. Hatching occurred in embryos around the 30-somites stage. The present results contribute only the second description of embryonic development to a species from the Moenkhausia genus, being also the first for this species. Such data are of paramount importance considering the current conflicting state of this genus phylogenetic classification and may help taxonomic studies. Understanding the biology of a species that is easily managed in laboratory conditions and has an ornamental appeal may assist studies in its reproduction to both supply the aquarium market and help the species conservation in nature. Moreover, these data enable the use of M. oligolepis as a model species in biotechnological applications, such as the germ cell transplantation approach.
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Return temperature after heat shock affects the production of tetraploids in the yellowtail tetra Astyanax altiparanae. ZYGOTE 2020; 29:82-86. [PMID: 32969784 DOI: 10.1017/s096719942000043x] [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] [Indexed: 11/07/2022]
Abstract
The aim of this study was to evaluate different post-shock temperatures for tetraploid induction in the yellowtail tetra Astyanax altiparanae. Newly fertilized eggs were divided into four groups, three were submitted to heat shock (40°C for 2 min) at 24 min post-fertilization (mpf) and another group remained without shock (control). Groups submitted to temperature shock were further separated at the following temperatures: 22°C, 26°C and 28°C. Survival among embryonic development was counted and at hatching the ploidy was analyzed by flow cytometry. The results showed that the post-shock temperature affects the parameters analyzed and, therefore, must be considered for optimization of the production of tetraploid in A. altiparanae. Those data are innovative and could be used in future studies of basic biology in this species.
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Levy-Pereira N, Yasui GS, Evangelista MM, Nascimento NF, Santos MP, Siqueira-Silva DH, Monzani PS, Senhorini JA, Pilarski F. In vivo phagocytosis and hematology in Astyanax altiparanae, a potential model for surrogate technology. BRAZ J BIOL 2020; 80:336-344. [DOI: 10.1590/1519-6984.205893] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 10/31/2018] [Indexed: 01/02/2023] Open
Abstract
Abstract Although the potential of surrogate propagation technology for aquaculture and conservation of Neotropical fish, the poor understanding of the host immune system may results in rejection and destruction of the donor material. Thus, it is necessary to study and to develop methods to evaluate the effects of immunosuppressive drugs employment and to evaluate the immunocompatibility between donor and receptor. Thus, the present study aimed to optimize a methodology to assess in vivo phagocytosis in Astyanax altiparanae using Saccharomyces cerevisiae and to evaluate their hematological response resultant from the inflammatory induction. To this, S. cerevisiae were labeled with Congo red and injected in the coelomic cavity of A. altiparanae at the concentration of 2.5 x 106 cells mL-1. A PBS solution and a non-injected group were kept as control. Fish blood was sampled and the phagocytic capacity and index were determined at 1, 2, 3 and 6 h post-injection (hpi). The yeast injection successfully stimulated phagocytosis, with the best result for phagocytosis assessment after 2 hpi. Moreover, it was achieved a high traceability of phagocytized and non-phagocytized yeast under optic microscopy analysis due to the Congo red labeling. The hematological profile was similar to usually observed in early infections, indicating lymphocyte migration to inflammatory site and increase in number of circulating phagocytes due to natural response to inflammatory stimulus. In conclusion, our method was efficient to assess in vivo phagocytosis in A. altiparanae and will be an important tool to evaluate the efficacy of immunosuppressive drugs in this species. Additionally, these results may serve as support for further studies in fish immunocompetence, both in laboratory and in field conditions.
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Affiliation(s)
- N. Levy-Pereira
- Universidade Estadual Paulista, Brasil; Instituto Chico Mendes de Conservação da Biodiversidade, Brasil
| | - G. S. Yasui
- Instituto Chico Mendes de Conservação da Biodiversidade, Brasil; Universidade Estadual Paulista, Brasil
| | - M. M. Evangelista
- Universidade Estadual Paulista, Brasil; Instituto Chico Mendes de Conservação da Biodiversidade, Brasil
| | | | | | - D. H. Siqueira-Silva
- Universidade de São Paulo, Brasil; Universidade Federal do Sul e Sudeste do Pará, Brasil
| | - P. S. Monzani
- Instituto Chico Mendes de Conservação da Biodiversidade, Brasil; Universidade de São Paulo, Brasil
| | - J. A. Senhorini
- Instituto Chico Mendes de Conservação da Biodiversidade, Brasil; Universidade Estadual Paulista, Brasil
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11
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Irvine SQ. Embryonic canalization and its limits-A view from temperature. JOURNAL OF EXPERIMENTAL ZOOLOGY PART B-MOLECULAR AND DEVELOPMENTAL EVOLUTION 2020; 334:128-144. [PMID: 32011096 DOI: 10.1002/jez.b.22930] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 01/17/2020] [Accepted: 01/21/2020] [Indexed: 02/06/2023]
Abstract
Many animals are able to produce similar offspring over a range of environmental conditions. This property of the developmental process has been termed canalization-the channeling of developmental pathways to generate a stable outcome despite varying conditions. Temperature is one environmental parameter that has fundamental effects on cell physiology and biochemistry, yet developmental programs generally result in a stable phenotype under a range of temperatures. On the other hand, there are typically upper and lower temperature limits beyond which the developmental program is unable to produce normal offspring. This review summarizes data on how development is affected by temperature, particularly high temperature, in various animal species. It also brings together information on potential cell biological and developmental genetic factors that may be responsible for developmental stability in varying temperatures, and likely critical mechanisms that break down at high temperature. Also reviewed are possible means for studying temperature effects on embryogenesis and how to determine which factors are most critical at the high-temperature limits for normal development. Increased knowledge of these critical factors will point to the targets of selection under climate change, and more generally, how developmental robustness in varying environments is maintained.
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Affiliation(s)
- Steven Q Irvine
- Department of Biological Sciences, University of Rhode Island, Kingston, Rhode Island
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12
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Fernandes K, Gomes A, Calado L, Yasui G, Assis D, Henry T, Fonseca A, Pinto E. Toxicity of Cyanopeptides from Two Microcystis Strains on Larval Development of Astyanax altiparanae. Toxins (Basel) 2019; 11:E220. [PMID: 31013880 PMCID: PMC6520764 DOI: 10.3390/toxins11040220] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 03/31/2019] [Accepted: 04/04/2019] [Indexed: 12/27/2022] Open
Abstract
Absorption and accumulation of bioavailable cyanobacterial metabolites (including cyanotoxins) are likely in fish after senescence and the rupturing of cells during bloom episodes. We determined the toxicity of cyanopeptides identified from two strains of Microcystis (M. panniformis MIRS-04 and M. aeruginosa NPDC-01) in a freshwater tropical fish, Astyanax altiparanae (yellowtail tetra, lambari). Aqueous extracts of both Microcystis strains were prepared in order to simulate realistic fish exposure to these substances in a freshwater environment. Both strains were selected because previous assays evidenced the presence of microcystins (MCs) in MIRS-04 and lack of cyanotoxins in NPDC-01. Identification of cyanobacterial secondary metabolites was performed by LC-HR-QTOF-MS and quantification of the MC-LR was carried out by LC-QqQ-MS/MS. MIRS-04 produces the MCs MC-LR, MC-LY and MC-HilR as well as micropeptins B, 973, 959 and k139. NPCD-01 biosynthetizes microginins FR1, FR2/FR4 and SD-755, but does not produce MCs. Larval fish survival and changes in morphology were assessed for 96 h exposure to aqueous extracts of both strains at environmentally relevant concentrations from 0.1 to 0.5 mg (dry weight)/mL, corresponding to 0.15 to 0.74 μg/mL of MC-LR (considering dried amounts of MIRS-04 for comparison). Fish mortality increased with concentration and time of exposure for both strains of Microcystis. The frequencies of morphological abnormalities increased with concentration in both strains, and included abdominal and pericardial oedema, and spinal curvature. Results demonstrate that toxicity was not solely caused by MCs, other classes of cyanobacterial secondary metabolites contributed to the observed toxicity.
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Affiliation(s)
- Kelly Fernandes
- Natural Resources Institute, Federal University of Itajubá, 1303 BPS Avenue, Itajubá, MG 37500-903, Brazil.
- School of Pharmaceutical Sciences, University of Sao Paulo, 580 Professor Lineu Prestes Avenue, São Paulo, SP 05508-000, Brazil.
| | - Andreia Gomes
- Natural Resources Institute, Federal University of Itajubá, 1303 BPS Avenue, Itajubá, MG 37500-903, Brazil.
- Federal Institute of Education Science and Technology of Rio de Janeiro, Washington Luis Highway, Niteroi, RJ 24310-000, Brazil.
| | - Leonardo Calado
- National Center for Research and Conservation of Continentals' Fish-CEPTA, SP-201 (Pref. Euberto Nemésio Pereira de Godoy-Motorway), Km 6.5, Pirassununga, SP 13630-970, Brazil.
- Faculty of Technology, State University of Campinas, 1888 Paschoal Marmo Street, Limeira, SP 13484-332, Brazil.
| | - George Yasui
- National Center for Research and Conservation of Continentals' Fish-CEPTA, SP-201 (Pref. Euberto Nemésio Pereira de Godoy-Motorway), Km 6.5, Pirassununga, SP 13630-970, Brazil.
| | - Diego Assis
- Bruker Daltonics Corporation, Condomínio BBP-Barão de Mauá, Atibaia, SP 12954-260, Brazil.
| | - Theodore Henry
- Institute of Life and Earth Sciences (ILES), Center for Marine Biodiversity & Biotechnology (CMBB), The School of Energy, Geoscience, Infrastructure and Society (EGIS), Heriot-Watt University, Edinburgh EH14 4AS, UK.
| | - Ana Fonseca
- Natural Resources Institute, Federal University of Itajubá, 1303 BPS Avenue, Itajubá, MG 37500-903, Brazil.
| | - Ernani Pinto
- School of Pharmaceutical Sciences, University of Sao Paulo, 580 Professor Lineu Prestes Avenue, São Paulo, SP 05508-000, Brazil.
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13
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Branco GS, Melo AG, Ricci JMB, Digmayer M, de Jesus LWO, Habibi HR, Nóbrega RH. Effects of GnRH and the dual regulatory actions of GnIH in the pituitary explants and brain slices of Astyanax altiparanae males. Gen Comp Endocrinol 2019; 273:209-217. [PMID: 30098316 DOI: 10.1016/j.ygcen.2018.08.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 08/01/2018] [Accepted: 08/02/2018] [Indexed: 02/04/2023]
Abstract
The pituitary gonadotropins, Fsh (follicle-stimulating hormone) and Lh (luteinizing hormone), regulate testicular development and functions in all vertebrates. At the pituitary, different signaling systems regulate the synthesis and secretion of the gonadotropins, such as the hypothalamic neuropeptides GnRH (gonadotropin-releasing hormone) and GnIH (gonadotropin-inhibitory hormone). While GnRH exerts stimulatory roles, the actions of GnIH remain controversial for many teleost species. Therefore, the aim of this study was to evaluate the in vitro effects of chicken GnRH2 (cGnRH2) and zebrafish GnIH-3 (zGnIH-3) on the male gonadotropin and GnRH system expression using pituitary explants and brain slices from a neotropical species with economical and ecological relevance, Astyanax altiparanae. Our results showed that in males, cGnRH2 increased fshb and lhb mRNA levels in the pituitary explants. Interestingly, zGnIH-3 has no effect on basal gonadotropin expression, however zGnIH-3 decreased the cGnRH2-induced fshb and lhb transcripts in male pituitary explants. In the male brain slices, zGnIH-3 showed stimulatory effects, increasing gnrh2 mRNA levels. Overall, our results suggested that GnIH seems to have dual regulatory actions on gonadotropin and GnRH2 expression of A. altiparanae males. This study provided basic information on endocrine regulation of A. altiparanae reproduction, and the obtained results will expand our knowledge, improving the reproductive management of this economically important freshwater species.
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Affiliation(s)
- Giovana Souza Branco
- Aquaculture Center of São Paulo State University (CAUNESP), São Paulo State University (UNESP), Jaboticabal Campus, Jaboticabal, Brazil; Reproductive and Molecular Biology Group, Department of Morphology, Institute of Biosciences, São Paulo State University (UNESP), Botucatu Campus, Botucatu, Brazil
| | - Aline Gomes Melo
- Reproductive and Molecular Biology Group, Department of Morphology, Institute of Biosciences, São Paulo State University (UNESP), Botucatu Campus, Botucatu, Brazil
| | - Juliana M B Ricci
- Reproductive and Molecular Biology Group, Department of Morphology, Institute of Biosciences, São Paulo State University (UNESP), Botucatu Campus, Botucatu, Brazil
| | - Melanie Digmayer
- Reproductive and Molecular Biology Group, Department of Morphology, Institute of Biosciences, São Paulo State University (UNESP), Botucatu Campus, Botucatu, Brazil
| | - Lázaro W O de Jesus
- Institute of Biological Sciences and Health, Federal University of Alagoas - A. C., Simões Campus, Maceió, Brazil
| | - Hamid R Habibi
- Department of Biological Sciences, University of Calgary, Calgary, Canada
| | - Rafael Henrique Nóbrega
- Reproductive and Molecular Biology Group, Department of Morphology, Institute of Biosciences, São Paulo State University (UNESP), Botucatu Campus, Botucatu, Brazil.
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In vivo storage of oocytes leads to lower survival, increased abnormalities and may affect the ploidy status in the yellowtail tetra Astyanax altiparanae. ZYGOTE 2018; 26:471-475. [PMID: 30419996 DOI: 10.1017/s0967199418000527] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
SummaryIn this study we analyzed whether the in vivo storage of oocytes (time after ovulation until fertilization) affects the survival and the ploidy status of the yellowtail tetra Astyanax altiparanae. Fish were induced to spawn and, after ovulation, a small aliquot was stripped and immediately fertilized (positive control group). Subsequently, aliquots (~150 oocytes) were stripped and fertilized at various time points of 60, 120, 180 or 240 min. Developmental stages, abnormalities, survival and the ploidy status of the hatched larvae were examined. As expected, in the control group, 100% of the larvae were diploid. Conversely, triploid individuals were observed just at the 60 min treatment time point (0.6%). In vivo storage of oocytes also influenced the survival rates (P < 0.05); the 180 and 240 min samples, respectively, presented lower survival rates at gastrula (50.10±6.26% and 40.92±5.32%), and somite (17.80±5.14% and 4.41±2.76%) stages and lower hatching rates (12.01±4.04% and 4.41±2.76%). A higher percentage (99.27±0.40%) of normal larvae and only a few abnormal larvae (0.73±0.40%) were observed in the control group (P = 0.0000). This observation did not differ from that observed at the 60 min treatment point (P = 0.9976). A significant increase in the percentage of abnormalities was observed in the other treatments, and, after 240 min, the highest percentage of abnormal larvae was seen (P=0.0024; 83.33±16.67%). In conclusion, we showed that oocyte ageing had a significant effect on survival and may affect the ploidy status in A. atiparanae.
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15
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Embryonic development of teleost Brycon orbignyanus. ZYGOTE 2018; 26:294-300. [PMID: 30223908 DOI: 10.1017/s0967199418000229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Brycon orbignyanus is an important large teleost that is currently on the list of endangered species, therefore studies on its reproductive biology and embryology are fundamental to help species conservation and recovery. The objective of this research was to characterize the events that occur during extrusion, fertilization and embryonic development of the species. The samples were collected at predetermined times, fixed and processed for light microscopy and scanning electron microscopy. The greenish oocytes were spherical, had translucent chorion and a mean diameter of 1.3±0.11 mm. The eggs had well defined animal and vegetative poles approximately 18 min post-fertilization. Stages from 2 to 128 blastomeres occurred between 20 min and 3 h post-fertilization (hPF), when the morula was characterized. The blastula stage was observed between 2 and 3 hPF, and the gastrula between 3 and 7 hPF, when the embryonic shield emerged and the cellular migration with the consequent formation of epiblast and hypoblast. At 8 hPF, the formation of the neural tube, above the notochord and the encephalic region, was observed, delimiting the forebrain, mesencephalon and rhombencephalon regions. From 11 hPF onward, the optic vesicle was formed close to the forebrain and the embryo tail was well developed. The optic vesicle was observed from 12 hPF onward, and the tail showed an intense movement that culminated with the rupture of the chorion and consequent hatching of the larva at 13 hPF and 27°C.
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Synchronizing developmental stages in Neotropical catfishes for application in germ cell transplantation. ZYGOTE 2018; 26:135-148. [DOI: 10.1017/s0967199418000035] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
SummaryThe aim of this study was to describe the effect of temperature on the fertilization, early developmental stages, and survival rate of two Neotropical catfishes Pimelodus maculatus and Pseudopimelodus mangurus. After fertilization, the eggs were incubated at 22°C, 26°C, and 30°C, which resulted in fertilization rates of 96.95 ± 1.79%, 98.74 ± 0.76%, and 98.44 ± 0.19% for P. maculatus and 96.10 ± 1.58%, 98.00 ± 0.63%, and 94.60 ± 2.09% for P. mangurus, respectively. For P. maculatus, hatching occurred after 22 h 30 min post-fertilization at 22°C, 16 h 30 min at 26°C, and 11 h 20 min at 30°C, and the hatching rates were 43.87 ± 7,46%, 57.57 ± 17.49%, and 53.63 ± 16.27%, respectively. For P. mangurus, hatching occurred after 28 h 30 min post-fertilization at 22°C and 17 h 30 min at 26°C with respective hatching rates of 45.4 ± 21.02% and 68.1 ± 12.67%. For this species, all embryos incubated at 30°C died before hatching. Additionally, for P. maculatus, the larvae from the lower (22°C) and higher temperatures (30°C) presented increased abnormality rates, as observed in the head, tail and yolk regions. The lowest abnormality rate was detected at 26°C, which was considered the optimal incubation temperature for both species. The developed protocol enables the manipulation of embryonic development, which is important for the application of reproductive biotechniques, including chimerism and chromosome-set manipulation. The data obtained here are also important for the surrogate propagation of this species as P. mangurus was recently categorized as an endangered fish species.
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17
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Short-term storage of the oocytes affects the ploidy status in the yellowtail tetra Astyanax altiparanae. ZYGOTE 2018; 26:89-98. [DOI: 10.1017/s0967199417000739] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
SummaryIn fish, many factors can affect reproduction during in vitro fertilization, therefore determination of the factors that affect affecting gamete quality is needed. However, few studies have focused on gamete quality and the ploidy status. This study was conducted to elucidate whether oocyte storage can affect ploidy status, survival, and embryo viability in the characid species Astyanax altiparanae. Oocytes were stored in Dulbecco's phosphate-buffered saline (PBS) at 26°C, then aliquots were fertilized immediately after extrusion (control) and also after 60, 120, 180, and 240 min of storage. Fertilization and hatching rates were measured, and the developmental stages were analyzed at each stage before describing the main abnormalities. Ploidy status was analyzed by flow cytometry and blood smear. In the control group, 100% of the samples were diploid. After treatment for 60 min, 95.56 ± 4.44% samples were diploid and 4.44 ± 4.44% were triploid. After 120 min, 94.44 ± 9.62% of the samples was diploid and 5.56 ± 5.56% were triploid; 100% of the samples were diploid after 180 min and, after 240 min, there was no survival. In other treatments, the highest percentage of hatching was after 60 min (88.93 ± 5.15%; P = 0.015), and treatment with 180 min storage resulted in the highest percentage of abnormal larvae (95.76 ± 12.67%; P = 0.012). These results show that oocyte storage can affect ploidy status and may be an interesting parameter for analysis in studies on chromosome set manipulation and micromanipulation.
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Xavier PLP, Senhorini JA, Pereira-Santos M, Fujimoto T, Shimoda E, Silva LA, Dos Santos SA, Yasui GS. A Flow Cytometry Protocol to Estimate DNA Content in the Yellowtail Tetra Astyanax altiparanae. Front Genet 2017; 8:131. [PMID: 28993791 PMCID: PMC5622163 DOI: 10.3389/fgene.2017.00131] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 09/06/2017] [Indexed: 11/28/2022] Open
Abstract
The production of triploid yellowtail tetra Astyanax altiparanae is a key factor to obtain permanently sterile individuals by chromosome set manipulation. Flow cytometric analysis is the main tool for confirmation of the resultant triploids individuals, but very few protocols are specific for A. altiparanae species. The current study has developed a protocol to estimate DNA content in this species. Furthermore, a protocol for long-term storage of dorsal fins used for flow cytometry analysis was established. The combination of five solutions with three detergents (Nonidet P-40 Substitute, Tween 20, and Triton X-100) at 0.1, 0.2, and 0.4% concentration was evaluated. Using the best solution from this first experiment, the addition of trypsin (0.125, 0.25, and 0.5%) and sucrose (74 mM) and the effects of increased concentrations of the detergents at 0.6 and 1.2% concentration were also evaluated. After adjustment of the protocol for flow cytometry, preservation of somatic tissue or isolated nuclei was also evaluated by freezing (at −20°C) and fixation in saturated NaCl solution, acetic methanol (1:3), ethanol, and formalin at 10% for 30 or 60 days of storage at 25°C. Flow cytometry analysis in yellowtail tetra species was optimized using the following conditions: lysis solution: 9.53 mM MgCl2.7H20; 47.67 mM KCl; 15 mM Tris; 74 mM sucrose, 0.6% Triton X-100, pH 8.0; staining solution: Dulbecco's PBS with DAPI 1 μg mL−1; preservation procedure: somatic cells (dorsal fin samples) frozen at −20°C. Using this protocol, samples may be stored up to 60 days with good accuracy for flow cytometry analysis.
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Affiliation(s)
- Pedro L P Xavier
- National Center for Research and Conservation of Continental Fish, Chico Mendes Institute of Biodiversity ConservationPirassununga, Brazil
| | - José A Senhorini
- National Center for Research and Conservation of Continental Fish, Chico Mendes Institute of Biodiversity ConservationPirassununga, Brazil
| | | | | | - Eduardo Shimoda
- Department of Pharmacy, Cândido Mendes UniversityRio de Janeiro, Brazil
| | - Luciano A Silva
- Department of Veterinary Medicine, University of Sao PauloPirassununga, Brazil
| | | | - George S Yasui
- National Center for Research and Conservation of Continental Fish, Chico Mendes Institute of Biodiversity ConservationPirassununga, Brazil
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19
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Stereological analysis of gonads from diploid and triploid fish yellowtail tetra Astyanax altiparanae (Garutti & Britski) in laboratory conditions. ZYGOTE 2017; 25:537-544. [DOI: 10.1017/s0967199417000399] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
SummaryThis study aimed to examine the gonadal morphology of diploid and triploid fish through stereological analysis. Triploid individuals were obtained after temperature shock (40°C for 2 min) at 2 min post-fertilization and reared until 175 days post-fertilization (dpf). Intact eggs were used to obtain the diploids. Gonads were collected for histological analysis at 83, 114, 144 and 175 dpf. Diploid females and males presented normal oogenesis and spermatogenesis through all the experimental period. Conversely, stereological analysis revealed that triploid females were sterile and oogonia were the prevalent cell type in the ovaries. Triploid males presented increased amounts of spermatocyte cysts and a large area of lumen when compared with diploids and in addition the amount of spermatozoa was lower than that observed for diploids. However, some triploid males presented spermatogenesis similar to diploids. Therefore, we concluded that triploidization is an interesting alternative to produce sterile individuals in A. altiparanae.
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de Siqueira-Silva DH, Dos Santos-Silva AP, Bashiyo-Silva C, Rodrigues MS, Vicentini CA, Ninhaus-Silveira A, Veríssimo-Silveira R. Testicular Structure and Seminal Pathway in the Yellowtail Tetra Astyanax altiparanae
(Characiforms: Characidae). Anat Histol Embryol 2017; 46:342-346. [DOI: 10.1111/ahe.12275] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Accepted: 04/07/2017] [Indexed: 11/26/2022]
Affiliation(s)
- D. H. de Siqueira-Silva
- Faculdade de Ciências da Saúde e Biologicas - FACISB; Instituto de estudos em Saúde e Biologicas - IESB; UNIFESSPA - Universidade Federal do Sul e Sudeste do Pará; Folha 31, quadra 07, Lote especial s/n - Nova Marabá Marabá Para 68507-590 Brazil
| | - A. P. Dos Santos-Silva
- Departamento de Biologia e Zootecnia; L.I.NEO - Laboratório de Ictiologia Neotropical; Campus de Botucatu; Programa de Pós-Graduação em Ciências Biológicas (Zoologia); UNESP - Univ. Estadual Paulista; Av: Brasil, Centro, N° 56 Ilha Solteira São Paulo 15385000 Brazil
| | - C. Bashiyo-Silva
- Departamento de Biologia e Zootecnia; L.I.NEO - Laboratório de Ictiologia Neotropical; Campus de Botucatu; Programa de Pós-Graduação em Ciências Biológicas (Zoologia); UNESP - Univ. Estadual Paulista; Av: Brasil, Centro, N° 56 Ilha Solteira São Paulo 15385000 Brazil
| | - M. S. Rodrigues
- Departamento de Biologia e Zootecnia; Faculdade de Engenharia de Ilha Solteira; L.I.NEO - Laboratório de Ictiologia Neotropical; UNESP - Univ. Estadual Paulista; Av: Brasil, Centro, N° 56. Ilha Solteira São Paulo 15385000 Brazil
| | - C. A. Vicentini
- Departamento de Ciências Biológicas; LAMOA - Laboratório de Morfologia de Organismos; Campus de Bauru; UNESP - Univ. Estadual Paulista ‘Júlio de Mesquita Filho’; Av. Eng. Luiz Edmundo Carrijo Coube, N°14-01 Bauru São Paulo 17033-360 Brazil
| | - A. Ninhaus-Silveira
- Departamento de Biologia e Zootecnia; L.I.NEO - Laboratório de Ictiologia Neotropical; Campus de Ilha Solteira; UNESP - Univ. Estadual Paulista; Av: Brasil, Centro, N° 56. Ilha Solteira São Paulo 15385000 Brazil
| | - R. Veríssimo-Silveira
- Departamento de Biologia e Zootecnia; L.I.NEO - Laboratório de Ictiologia Neotropical; Campus de Ilha Solteira; UNESP - Univ. Estadual Paulista; Av: Brasil, Centro, N° 56. Ilha Solteira São Paulo 15385000 Brazil
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