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Gomes RZ, Paschoalini AL, Weber AA, Santiago KB, Rizzo E, Bazzoli N. Impact of a large dam on reproduction of a non-migratory teleost species, Acestrorhynchus lacustris (Characiformes: Acestrorhynchidae). BRAZ J BIOL 2021; 82:e240894. [PMID: 34105651 DOI: 10.1590/1519-6984.240894] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 11/04/2020] [Indexed: 11/22/2022] Open
Abstract
The release of water from the reservoir hypolimnion, lower concentration of oxygen and the anthropogenic regulation of the river flow, could affect the reproduction of fish, especially migratory species. However, little is known about the effects of these changes in water on non-migratory species. In this sense, the reproduction of Acestrohynchus lacustris was evaluated in two sections of São Francisco River, Minas Gerais, Brazil. Section 1, located immediately downstream from Três Marias Dam (18°09'31.65"S and 45°13'36.00"W) and section 2, located at the confluence of the São Francisco and the Abaeté Rivers (18°02'47.78"S and 45°10'57.95"W). For this, we obtained the physico-chemical parameters of water of each study section. Additionally, biometric data and biological indices of all specimens were measured. Fecundity and follicles diameters were measured in females. Temperature, dissolved oxygen and flow showed lower values in section 1. Fish captured in this section, had lower values of GSI in both sexes, and females presented decreased values of fecundity and follicles diameter. This species showed reproductive activity in the two sections analyzed, however, in section 1 where the temperature and dissolved oxygen presented significant lower values, the reproductive capacity of A. lacustris, was negatively affected.
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Affiliation(s)
- R Z Gomes
- Pontifícia Universidade Católica de Minas Gerais - PUC Minas, Instituto de Ciências Biológicas e da Saúde, Programa de Pós-graduação em Biologia de Vertebrados, Belo Horizonte, MG, Brasil
| | - A L Paschoalini
- Pontifícia Universidade Católica de Minas Gerais - PUC Minas, Instituto de Ciências Biológicas e da Saúde, Programa de Pós-graduação em Biologia de Vertebrados, Belo Horizonte, MG, Brasil
| | - A A Weber
- University of California, Department of Pharmacology, Robert Tukey Lab, San Diego, CA, United States
| | - K B Santiago
- Centro Integrado de Recursos Pesqueiros e Aquicultura de Três Marias - CODEVASF, Três Marias, MG, Brasil
| | - E Rizzo
- Universidade Federal de Minas Gerais - UFMG, Instituto de Ciências Biológicas, Departamento de Morfologia, Laboratório de Ictiohistologia, Belo Horizonte, MG, Brasil
| | - N Bazzoli
- Pontifícia Universidade Católica de Minas Gerais - PUC Minas, Instituto de Ciências Biológicas e da Saúde, Programa de Pós-graduação em Biologia de Vertebrados, Belo Horizonte, MG, Brasil
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Paschoalini AL, Savassi LA, Arantes FP, Rizzo E, Bazzoli N. Heavy metals accumulation and endocrine disruption in Prochilodus argenteus from a polluted neotropical river. Ecotoxicol Environ Saf 2019; 169:539-550. [PMID: 30476816 DOI: 10.1016/j.ecoenv.2018.11.047] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 09/21/2018] [Accepted: 11/11/2018] [Indexed: 05/20/2023]
Abstract
Heavy metals are considered major pollutants of aquatic environments due to the difficulty of metabolization and the bioaccumulative potential in tissues of aquatic organisms, especially fish muscle that is often used as food worldwide. In addition to causing cell damage, some metals such as aluminium (Al), cadmium (Cd), copper (Cu), and lead (Pb) can act as endocrine disrupting chemicals in fish. The Paraopeba and Abaete Rivers are important tributaries of the upper São Francisco River basin, but the Paraopeba River receives, along its course, the discharge of many types of effluents that affect fish species, including widely consumed species such as Prochilodus argenteus. This study evaluated histological and molecular changes caused by chronic exposure to heavy metals in P. argenteus from the Paraopeba River and compared this to fish from the non-impacted Abaete River. Sampled fish from both rivers were used in histological analyses and immunohistochemical assays. The results showed increased incidence of histopathologies and changes in number and morphology of germline cells in both sexes. In addition, up-regulated expression of oestrogens-induced proteins in the liver of males were detected in polluted environment. All the alterations were related to the concentration of metals in water and fish. The high concentration of various metals observed in water and fish from Paraopeba River serves as an alert to the environmental and public health regulatory authorities.
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Affiliation(s)
- A L Paschoalini
- Morphology department, Biological Sciences Institute, Federal University of Minas Gerais, UFMG, Belo Horizonte 30161-970, Minas Gerais, Brazil
| | - L A Savassi
- Morphology department, Biological Sciences Institute, Federal University of Minas Gerais, UFMG, Belo Horizonte 30161-970, Minas Gerais, Brazil
| | - F P Arantes
- Post-Graduate Program in Vertebrate Biology, Pontifical Catholic University of Minas Gerais, PUC Minas, Belo Horizonte 30535-610, Minas Gerais, Brazil
| | - E Rizzo
- Morphology department, Biological Sciences Institute, Federal University of Minas Gerais, UFMG, Belo Horizonte 30161-970, Minas Gerais, Brazil
| | - N Bazzoli
- Post-Graduate Program in Vertebrate Biology, Pontifical Catholic University of Minas Gerais, PUC Minas, Belo Horizonte 30535-610, Minas Gerais, Brazil.
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Martins YS, Melo RMC, Campos-Junior PHA, Santos JCE, Luz RK, Rizzo E, Bazzoli N. Salinity and temperature variations reflecting on cellular PCNA, IGF-I and II expressions, body growth and muscle cellularity of a freshwater fish larvae. Gen Comp Endocrinol 2014; 202:50-8. [PMID: 24747484 DOI: 10.1016/j.ygcen.2014.03.047] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Revised: 03/12/2014] [Accepted: 03/25/2014] [Indexed: 12/22/2022]
Abstract
The present study assessed the influence of salinity and temperature on body growth and on muscle cellularity of Lophiosilurus alexaxdri vitelinic larvae. Slightly salted environments negatively influenced body growth of freshwater fish larvae and we observed that those conditions notably act as an environmental influencer on muscle growth and on local expression of hypertrophia and hypeplasia markers (IGFs and PCNA). Furthermore, we could see that salinity tolerance for NaCl 4gl(-)(1) diminishes with increasing temperature, evidenced by variation in body and muscle growth, and by irregular morphology of the lateral skeletal muscle of larvae. We saw that an increase of both PCNA and autocrine IGF-II are correlated to an increase in fibre numbers and fibre diameter as the temperature increases and salinity diminishes. On the other hand, autocrine IGF-I follows the opposite way to the other biological parameters assessed, increasing as salinity increases and temperature diminishes, showing that this protein did not participate in muscle cellularity, but participating in molecular/cellular repair. Therefore, slightly salted environments may provide adverse conditions that cause some obstacles to somatic growth of this species, suggesting some osmotic expenditure with a salinity increment.
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Affiliation(s)
- Y S Martins
- Departamento de Morfologia, Instituo de Ciências Biológicas, Universidade Federal de Minas Gerais, P.O. Box 486, Antônio Carlos 6627, Belo Horizonte, MG 30161-970, Brazil
| | - R M C Melo
- Departamento de Morfologia, Instituo de Ciências Biológicas, Universidade Federal de Minas Gerais, P.O. Box 486, Antônio Carlos 6627, Belo Horizonte, MG 30161-970, Brazil
| | - P H A Campos-Junior
- Departamento de Morfologia, Instituo de Ciências Biológicas, Universidade Federal de Minas Gerais, P.O. Box 486, Antônio Carlos 6627, Belo Horizonte, MG 30161-970, Brazil
| | - J C E Santos
- Hidrobiology and Hatchery Station of Três Marias CODEVASF, P.O. Box 11, Três Marias, MG 39205-000, Brazil
| | - R K Luz
- Laboratório de Aquacultura da Escola de Veterinária da Universidade Federal de Minas Gerais, P.O. Box 567, Antônio Carlos 6627, Belo Horizonte, MG 30123970, Brazil
| | - E Rizzo
- Departamento de Morfologia, Instituo de Ciências Biológicas, Universidade Federal de Minas Gerais, P.O. Box 486, Antônio Carlos 6627, Belo Horizonte, MG 30161-970, Brazil
| | - N Bazzoli
- Programa de Pós-Graduação em Zoologia de Vertebrados da PUC Minas, 500, prédio 41, Belo Horizonte, MG 30525-610, Brazil.
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Santos ML, Sales NG, Arantes FP, Pessali TC, Bazzoli N, Santos JE. Anatomical and histological organization of the testes of the inseminating catfish Trachelyopterus striatulus (Steindachner, 1877) (Siluriformes: Auchenipteridae). Anat Histol Embryol 2013; 43:310-6. [PMID: 24033472 DOI: 10.1111/ahe.12082] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Accepted: 07/01/2013] [Indexed: 11/29/2022]
Abstract
The testicular morphology, spermatogenesis and occurrence of sperm in the ovarian lumen of Trachelyopterus striatulus were studied using anatomical, histological and biometric techniques. A total of 50 catfish (T. striatulus) were captured, measuring 14.9 ± 2.5 cm of standard length, body weight was 81.2 ± 34.5 g and their testes weighed 16.9 ± 6.1 g. The testes of T. striatulus are paired organs, showing two distinct regions: cranial, which shows a compact medial part and with fringes ventrally, and caudal region, which is formed of the seminal vesicle with fringes laterally and two saculiform expansions. The testes presented a length of 35.2 ± 6.9 mm, and the fringes showed a cranial length of 12.1 ± 3.8 mm and caudal length of 6.4 ± 2.6 mm. Histologically, the cranial fringes are spermatogenic and showed cells with significantly different nuclear diameters, ranging from 8.2 ± 1.5 μm (primary spermatogonia) to 1.88 ± 0.3 μm (spermatid). The seminal vesicles and saculiform expansions showed tubules with a simple prismatic secretory epithelium containing spermatozoa and secretion into the lumen. The caudal fringes are exclusively for secretory flow, consisting of tubules with a simple cuboidal epithelium. The common spermatic duct showed a simple cuboidal epithelium and contained spermatozoa with secretion into the lumen. The secretion of the caudal region is acidophilic, with neutral glycoproteins and sialomucin. T. striatulus ovaries showed free spermatozoa or were organized in spermatozeugmata into the ovarian lumen and between the ovuligers lamellae.
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Affiliation(s)
- M L Santos
- Programa de Pós-graduação em Zoologia de Vertebrados da PUC Minas, Av. Dom José Gaspar, 500, Coração Eucarístico, 30.535-610, Belo Horizonte, Minas Gerais, Brazil
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Arantes FP, Borçato FL, Sato Y, Rizzo E, Bazzoli N. Reproduction and embryogenesis of the mandi-amarelo catfish,Pimelodus maculatus(Pisces, Pimelodidae), in captivity. Anat Histol Embryol 2012; 42:30-9. [DOI: 10.1111/j.1439-0264.2012.01160.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2011] [Accepted: 04/01/2012] [Indexed: 11/29/2022]
Affiliation(s)
- F. P. Arantes
- Programa de Pós-Graduação em Zoologia de Vertebrados; Pontifícia Universidade Católica de Minas Gerais; PUC Minas; Belo Horizonte; Minas Gerais (MG); 30535-610; Brasil
| | - F. L. Borçato
- Programa de Pós-Graduação em Zoologia de Vertebrados; Pontifícia Universidade Católica de Minas Gerais; PUC Minas; Belo Horizonte; Minas Gerais (MG); 30535-610; Brasil
| | - Y. Sato
- Estação de Hidrobiologia e Piscicultura de Três Marias; Companhia de Desenvolvimento dos Vales do São Francisco e Parnaíba (CODEVASF); C.P. 11; Três Marias; Minas Gerais; 39205-000; Brasil
| | - E. Rizzo
- Laboratório de Ictiohistologia; Departamento de Morfologia; Universidade Federal de Minas Gerais (UFMG); C.P. 486; Minas Gerais; 30161-970; Brasil
| | - N. Bazzoli
- Programa de Pós-Graduação em Zoologia de Vertebrados; Pontifícia Universidade Católica de Minas Gerais; PUC Minas; Belo Horizonte; Minas Gerais (MG); 30535-610; Brasil
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Perini VR, Sato Y, Rizzo E, Bazzoli N. Comparative Analysis of the Oocytes and Early Development of Two Species of Curimatidae Teleost Fish. Anat Histol Embryol 2012; 42:40-7. [DOI: 10.1111/j.1439-0264.2012.01162.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Accepted: 04/01/2012] [Indexed: 11/26/2022]
Affiliation(s)
- V. R. Perini
- 1; Departamento de Morfologia; Universidade Federal de Minas Gerais (UFMG); P.O. Box 486; Belo Horizonte; Minas Gerais; 30161-970; Brazil
| | - Y. Sato
- Estação de Hidrobiologia e Piscicultura de Três Marias; Companhia de Desenvolvimento dos Vales do São Francisco e Parnaíba; P.O. Box 11; Três Marias; Minas Gerais; 39205-000; Brazil
| | - E. Rizzo
- 1; Departamento de Morfologia; Universidade Federal de Minas Gerais (UFMG); P.O. Box 486; Belo Horizonte; Minas Gerais; 30161-970; Brazil
| | - N. Bazzoli
- Programa de Pós-graduação em Zoologia de Vertebrados; Pontifícia Universidade Católica de Minas Gerais; PUC Minas, Av. Dom José Gaspar, 500; Belo Horizonte; Minas Gerais; 30535-610; Brazil
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Alberto Weber A, Sato Y, Enemir Santos J, Rizzo E, Bazzoli N. Eggs Ultrastructure and Early Development of Franciscodoras marmoratus (Pisces: Doradidae). Anat Histol Embryol 2011; 41:177-83. [DOI: 10.1111/j.1439-0264.2011.01121.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2011] [Accepted: 11/06/2011] [Indexed: 11/28/2022]
Affiliation(s)
- A. Alberto Weber
- Programa de Pós-graduação em Zoologia de Vertebrados; Pontifícia Universidade Católica de Minas Gerais; Brazil. Av. Dom José Gaspar, 500; 30535-610; Belo Horizonte; Minas Gerais; Brazil
| | - Y. Sato
- Estação de Hidrobiologia e Piscicultura de Três Marias; Companhia de Desenvolvimento dos Vales do São Francisco e do Parnaíba; 39205-000; Três Marias; Minas Gerais; Brazil
| | - J. Enemir Santos
- Programa de Pós-graduação em Zoologia de Vertebrados; Pontifícia Universidade Católica de Minas Gerais; Brazil. Av. Dom José Gaspar, 500; 30535-610; Belo Horizonte; Minas Gerais; Brazil
| | - E. Rizzo
- Departamento de Morfologia; Instituto de Ciências Biológicas; Universidade Federal de Minas Gerais; UFMG; 30161-970; Belo Horizonte; Minas Gerais; Brazil
| | - N. Bazzoli
- Programa de Pós-graduação em Zoologia de Vertebrados; Pontifícia Universidade Católica de Minas Gerais; Brazil. Av. Dom José Gaspar, 500; 30535-610; Belo Horizonte; Minas Gerais; Brazil
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Honorato-Sampaio K, Santos GB, Bazzoli N, Rizzo E. Observations on the seasonal breeding biology and fine structure of the egg surface in the white piranha Serrasalmus brandtii from the São Francisco River basin, Brazil. J Fish Biol 2009; 75:1874-1882. [PMID: 20738655 DOI: 10.1111/j.1095-8649.2009.02422.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
In the Juramento Reservoir, south-eastern Brazil, the white piranha Serrasalmus brandtii showed a prolonged reproductive season, with evidence for multiple spawning and a reproductive peak associated with seasonal rains. The egg surface exhibited a honeycomb-like pore canal arrangement and an adhesive apparatus surrounding the micropyle. Electron microscopic analysis suggests a role for the micropylar cell and neighbouring follicular cells in secretion of substances for egg attachment.
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Affiliation(s)
- K Honorato-Sampaio
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, C P 486, 30161-970 Belo Horizonte, Minas Gerais, Brazil
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Santos H, Thomé R, Arantes F, Sato Y, Bazzoli N, Rizzo E. Ovarian follicular atresia is mediated by heterophagy, autophagy, and apoptosis in Prochilodus argenteus and Leporinus taeniatus (Teleostei: Characiformes). Theriogenology 2008; 70:1449-60. [DOI: 10.1016/j.theriogenology.2008.06.091] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2008] [Revised: 06/12/2008] [Accepted: 06/18/2008] [Indexed: 11/26/2022]
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Santos HB, Sato Y, Moro L, Bazzoli N, Rizzo E. Relationship among follicular apoptosis, integrin β1 and collagen type IV during early ovarian regression in the teleost Prochilodus argenteus after induced spawning. Cell Tissue Res 2008; 332:159-70. [DOI: 10.1007/s00441-007-0540-1] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2007] [Accepted: 10/22/2007] [Indexed: 10/22/2022]
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Ribeiro VMA, Bazzoli N, Maria TA, Santos GB. Ultrastructural changes in female hepatocytes during ovarian maturation of Steindachnerina insculpta (Pisces: Curimatidae). BRAZ J BIOL 2006; 66:957-62. [PMID: 17299931 DOI: 10.1590/s1519-69842006000600002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
During gonadal maturation the females of Steindachnerina insculpta, a teleost of the Furnas reservoir, Minas Gerais, Brazil, show low hepatosomatic and high gonadossomatic indexes, suggesting possible transference of hepatic substances to the ovaries. In comparison to the resting phase, in the maturation/mature one the hepatocytes show greater development of both smooth and rough endoplasmic reticula, increased electron density in the mitochondria, and glycogen scattered throughout the cytoplasm. In both resting and maturation/mature phases, the hepatic parenchyma contains melanomacrophagic centers that consist of degenerating cellular debris and are surrounded by capsules formed by cells, resembling fibroblasts, joined by desmosomes. No physiological relation of these centers with ovarian maturation was found.
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Affiliation(s)
- V M A Ribeiro
- Graduate Program in Zoology of Vertebrates, Pontifical Catholic University, Belo Horizonte, Minas Gerais, Brazil
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Santos JE, Padilha GEV, Bomcompagni-Júnior O, Santos GB, Rizzo E, Bazzoli N. Ovarian follicle growth in the catfish Iheringichthys labrosus (Siluriformes: Pimelodidae). Tissue Cell 2006; 38:303-10. [PMID: 16996098 DOI: 10.1016/j.tice.2006.07.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2006] [Revised: 07/13/2006] [Accepted: 07/27/2006] [Indexed: 11/30/2022]
Abstract
The morphofunctional organisation of the female reproductive system, the oocyte growth and the follicular envelope ultrastructure were studied by the first time in the catfish Iheringichthys labrosus from Upper Paraná River basin, Southeastern Brazil, in order to contribute to the knowledge of the reproductive behaviour strategies of this species. As in other Neotropical freshwater siluriforms, the ovaries are of the cystovarian type, the oocytes develop in an asynchronous pattern and mature oocytes are released in clusters in the ovarian lumen, being transported through the oviduct to the urogenital papilla. During the primary growth, nuclear material is transported to the ooplasm, forming the yolk nucleus, where proliferate membranous organelles. The onset of the zona radiata formation occurs during the late perionucleolar stage with the deposition of the outer layer. At the vitellogenic stage, this envelope reaches 6.35+/-0.84microm of thickness, being constituted by three distinct layers crossed by pore-canals containing oocyte and follicular cells processes. Cytochemical analyses evidence neutral glycoproteins in cortical alveoli, yolk globules and zona radiata. Follicular cells with squamous shape during the primary growth acquire synthetic activity at the secondary growth, reaching 37.82+/-4.72mum in height at the mature vitellogenic follicles. These cells accumulate sulphated polysaccharides in large electron-lucent vesicles during the vitellogenic stage which are possibly secreted to form a mucous coat at the egg surface. These evidences suggest that I. labrosus may have adhesive eggs as also detected in other Neotropical freshwater Siluriformes.
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Affiliation(s)
- J E Santos
- Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Brazil, P.O. Box 486, 30 161-970 Belo Horizonte, Minas Gerais, Brazil
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Gonçalves TL, Bazzoli N, Brito MFG. Gametogenesis and reproduction of the matrinxã Brycon orthotaenia (Günther, 1864) (Pisces: Characidae) in the São Francisco river, Minas Gerais, Brazil. BRAZ J BIOL 2006; 66:513-22. [PMID: 16862307 DOI: 10.1590/s1519-69842006000300018] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2004] [Accepted: 08/11/2004] [Indexed: 11/21/2022] Open
Abstract
The gametogenesis and reproduction of the matrinxã, Brycon orthotaenia in the São Francisco river, Pirapora Region, Minas Gerais, were studied from December, 1998 to November, 1999. The matrinxã B. orthotaenia is an endemic species in the São Francisco river basin in Brazil and important for commercial fishing. The size of the 1st gonadal maturation, indicated by the total length of the smallest spent males and spawned female, was 32.0 and 40.5 cm respectively. Reproduction occurred from October to January, when high frequencies of females and males at an advanced ripening/mature stage and spawned females were found. The short spawning period and histological characteristics of spawned ovaries containing only oocytes in stages of initial development, along with post-ovulatory and atresic follicles, indicated that Brycon orthotaenia presents total spawning.
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Affiliation(s)
- T L Gonçalves
- Programa de Pós-Graduação em Zoologia de Verterbrados, Pontíficia Universidade Católica de Minas Gerais - PUC Minas, Av. Dom José Gaspar, 500, Coração Eucarístico, Prédio 41, CEP 30535-610, Belo Horizonte, Minas Gerais, Brazil
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Brito M, Bazzoli N. Reproduction of the surubim catfish (Pisces, Pimelodidae) in the São Francisco River, Pirapora Region, Minas Gerais, Brazil. ARQ BRAS MED VET ZOO 2003. [DOI: 10.1590/s0102-09352003000500018] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The reproductive biology of the surubim, P. coruscans of the São Francisco River, in the Pirapora region was studied from December/98 to November/99. Reproduction occurred between October and January with high frequency of fishes in the advanced ripening/mature and spawned/spent stages along with higher values of the gonadosomatic index. Macroscopic and microscopic analyses indicated that P. coruscans presents total spawning. The reproductive period coincided with highest rainfall and water turbidity values in the region. The smallest male captured had a total length of 63.3cm and the smallest female 92.0cm in total length. The largest male in the maturation stage was recorded to be 97.0cm and the largest female 144.1cm in total length. Surubim were more frequently captured than females, at a proportion of approximately one female to three males. The gonadosomatic, hepatosomatic, stomach repletion, and coelomic fat indexes, as well as the condition factor were related to stages of the reproductive cycle.
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Affiliation(s)
- M.F.G. Brito
- Pontifícia Universidade Católica de Minas Gerais
| | - N. Bazzoli
- Pontifícia Universidade Católica de Minas Gerais
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Santos JE, Bazzoli N, Rizzo E, Santos GB. Morphofunctional organization of the male reproductive system of the catfish Iheringichthys labrosus (Lütken, 1874) (Siluriformes:Pimelodidae). Tissue Cell 2001; 33:533-40. [PMID: 11949789 DOI: 10.1054/tice.2001.0207] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
An anatomical, histological and ultrastructural study was made of the reproductive system and spermatogenesis of Iheringichthys labrosus. The testis are digitiform and consist of a sperm atogenic cranial region, a spermatogenic/secretory medial (transition) region, and a strictly secretory caudal region. The cranial region represents 66% of the total length of the maturing testis and its fringes or lobes have a length of 5.59 + 0.73 mm. The medial and caudal regions represent each 17% of the testicular length and their fringes have a length of 5.37 +/- 0.69 mm and 3.12 +/- 0.38 mm, respectively. Histologically, the cranial region of the testis is made up of seminiferous tubules with spermatogenic cells contained in cysts. These cells undergo synchronous development, inside the cysts where spermatogenesis is completed. The secretory caudal region does not constitute an individualized gland. Ultrastructurally, its secretory cells have a vesiculous nucleus and a cytoplasm with abundant dilated cisternae of rough endoplasmic reticulum. The caudal region produces a glycoproteic secretion and exhibits variable electron density during maturation. During the resting period, these cells are poor in synthesis organelles. The spermatozoa are of the primitive type, with a round head (1.56 +/- 0.11 microm), a rudimentary middle piece, and a long flagellum with a 9 + 2 axonemal arrangement.
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Affiliation(s)
- J E Santos
- Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
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Abstract
The gametogenesis of Bryconops affinis was studied by light, transmission and scanning electron microscopy. The spermatogenesis is semi-cystic and spermatids are released into the lumen of seminiferous tubules, where spermiogenesis is completed. Spermatozoa have an ovoid head, a rudimentary middle piece with a small number of mitochondria and long flagellum (primitive spermatozoa). The Sertoli and Leydig cells show secretory activity during spermatogenesis. By the end of this phenomenon, the Sertoli cells phagocytize the residual spermatozoa, while the Leydig cells show involuted characteristics. With regard to the oogenesis process, the oocyte development was divided into four stages based on the cytological characteristics of the oocyte and its surrounding layers. Ultrastructural analysis revealed that the zona pellucida is formed during the previtellogenic stage. Specializations associated to the outer layer of the zona pellucida may be related to the egg's adherence to the substrata.
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Affiliation(s)
- R F Andrade
- Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
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17
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Abstract
This is the first evidence of programmed cell death, or apoptosis, occurring in the postovulatory follicle (POF) of teleost fish. Females of Astyanax bimaculatus lacustris were submitted to induced ovulation through injecting pituitary extract. Ultrastructural analyses of POFs at time intervals varying from zero to four days postspawning showed several characteristic events of the apoptosis. Typical apoptotic figures, such as nucleus with chromatin condensation underlying the nuclear envelope in a crescent pattern and apoptotic bodies at different stages of formation and reabsorption, were observed in the follicular cells a few days after the onset of the postovulatory period. The results indicated that apoptosis is the major mechanism responsible for the elimination of the follicular cells in the POFs of A. bimaculatus lacustris during ovarian recovery postspawning. It is suggested that POFs might be used as an experimental model in dynamic studies involving cell death in teleosts.
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Affiliation(s)
- C D Drummond
- Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
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