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dc.contributor.author
Honji, Renato Massaaki
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dc.contributor.author
Nóbrega, Rafael Henrique
dc.contributor.author
Pandolfi, Matias
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dc.contributor.author
Shimizu, Akio
dc.contributor.author
Borella, María Agustina
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dc.contributor.author
Guimarães Moreira, Renata
dc.date.available
2022-12-27T13:30:00Z
dc.date.issued
2013-05
dc.identifier.citation
Honji, Renato Massaaki; Nóbrega, Rafael Henrique; Pandolfi, Matias; Shimizu, Akio; Borella, María Agustina; et al.; Immunohistochemical study of pituitary cells in wild and captive Salminus hilarii (Characiformes: Characidae) females during the annual reproductive cycle; Springer; SpringerPlus; 2; 1; 5-2013; 1-14
dc.identifier.issn
2193-1801
dc.identifier.uri
http://hdl.handle.net/11336/182500
dc.description.abstract
Freshwater fish that live exclusively in rivers are at particular risk from fragmentation of the aquatic system, mainly the species that migrate upriver for reproduction. That is the case of Salminus hilarii, an important migratory species currently classified as "almost threatened" in the São Paulo State (Brazil), facing water pollution, dam construction, riparian habitat destruction and environmental changes that are even more serious in this State. Additionally, this species show ovulation dysfunction in captivity. Our studies focused on the identification and distribution of the pituitary cell types in the adenohypophysis of S. hilarii females, including a morphometric analysis that compares pituitary cells from wild and captive broodstocks during the reproductive annual cycle. The morphology of adenohypophysial cells showed differences following the reproductive cycle and the environment. In general, optical density suggested a higher cellular activity during the previtellogenic (growth hormone) and vitellogenic (somatolactin) stages in both environments. Additionally, the nucleus/cell ratio analysis suggested that growth hormone and somatolactin cells were larger in wild than in captive females in most reproductive stages of the annual cycle. In contrast, prolactin hormone showed no variation throughout the reproductive cycle (in both environments). Morphometrical analyses related to reproduction of S. hilarii in different environmental conditions, suggest that somatolactin and growth hormone play an important role in reproduction in teleost and can be responsible for the regulation of associated processes that indirectly affect reproductive status.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
GONADOTROPINS
dc.subject
GROWTH HORMONE
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PROLACTIN HORMONE
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REPRODUCTIVE DYSFUNCTION
dc.subject
SOMATOLACTIN HORMONE
dc.subject.classification
Biología Reproductiva
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dc.subject.classification
Ciencias Biológicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Immunohistochemical study of pituitary cells in wild and captive Salminus hilarii (Characiformes: Characidae) females during the annual reproductive cycle
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2022-12-27T11:11:43Z
dc.journal.volume
2
dc.journal.number
1
dc.journal.pagination
1-14
dc.journal.pais
Alemania
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dc.description.fil
Fil: Honji, Renato Massaaki. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Biodiversidad y Biología Experimental y Aplicada. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Biodiversidad y Biología Experimental y Aplicada; Argentina. Universidade de Sao Paulo. Departamento de Fisiología. Instituto de Biociencias; Brasil
dc.description.fil
Fil: Nóbrega, Rafael Henrique. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil
dc.description.fil
Fil: Pandolfi, Matias. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Biodiversidad y Biología Experimental y Aplicada. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Biodiversidad y Biología Experimental y Aplicada; Argentina
dc.description.fil
Fil: Shimizu, Akio. National Research Institute of Fisheries Sciences; Japón
dc.description.fil
Fil: Borella, María Agustina. Universidade do Sao Paulo. Instituto de Ciencias Biomedicas; Brasil
dc.description.fil
Fil: Guimarães Moreira, Renata. Universidade de Sao Paulo. Departamento de Fisiología. Instituto de Biociencias; Brasil
dc.journal.title
SpringerPlus
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1186/2193-1801-2-460
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