Reproductive biology of Oligosarcus argenteus (Gunther, 1864) adult males and description of the gonadal maturation stages

Matt, Sérgio Luis Pinto da; Gomes, Marcos de Lucca Moreira; Andrade, Dálcio Ricardo de

doi:10.1590/s1516-89132009000100016

Cited by 6 publications

(7 citation statements)

References 24 publications

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“…The morphological characterization of C. kelberi testes as lobular type, phylogenetically corroborates with Parenti & Grier (2004) results, who propose this testicular type as a synapomorphic character present in all surviving Neoteleost, just like the results obtained for other species of the orders Perciformes, Scorpaeniformes and Synbranchiformes, which represent more derived taxa when compared to Characiformes, Cypriniformes, and Siluriformes, whose testes were classified as anastomosing tubular (Selman & Wallace, 1986 Muñoz et al, 2002;Lo Nostro et al, 2003b;Arias et al, 2004, Dadzie & Abou-Seedo, 2004Parenti & Grier, 2004;Thacker & Grier, 2005;Nobrega & Quágio-Grassiotto, 2007;Spadella et al, 2008;Matta et al, 2009;Leal et al, 2009;Martins et al, 2010;Muñoz et al, 2010).…”

Section: Discussionsupporting

confidence: 84%

Reproductive cycle of the Neotropical cichlid yellow peacock bass Cichla kelberi: A novel pattern of testicular development

et al. 2013

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The present study describes the testicular maturation phases (associating the germ cells development and the morphological changes suffered by the germinal epithelium along the whole year), and the testicular morphology in the yellow peacock bass Cichla kelberi, relating it to other species. For this purpose, 78 specimens were studied according conventional techniques of light microscope. The testes in C. kelberi were classified as unrestricted spermatogonial lobular, an apomorphic characteristic in the recent groups of Teleost. Furthermore, were defined five testicular maturation phases: Preparatory phase; Early Germinal Epithelium Development; Mid Germinal Epithelium Development; Late Germinal Epithelium Development and; Regression. Similar classifications were described to other species indicating that the testicular classifications based on this propose, can be applied to lots of fishes. However, besides it similarity, the testicular reproductive cycle of C. kelberi follows a different pattern in the Regression phase, on which the gonadal restructuration and the spermatogonial proliferation gathers at the same time. So, the testes in C. kelberi never return to the Preparatory phase to start a new reproductive cycle, being this one present only at the first reproductive cycle in this species. This fact also explains the absence of individuals totally spent after their first reproductive cycle.O presente estudo descreve as fases de maturação testicular (associando o desenvolvimento das células germinativas e as alterações morfológicas sofridas pelo epitélio germinativo ao longo do ano), e a morfologia testicular do tucunaré amarelo Cichla kelberi, relacionando a outras espécies. Com este propósito, 78 indivíduos foram estudados de acordo com técnicas convencionais para microscopia de luz. Os testículos em C. kelberi foram classificados como lobular espermatogonial irrestrito, uma característica apomórfica encontrada nos grupos recentes dos teleósteos. Além disso, cinco fases de maturação testicular foram definidas para C. kelberi: Fase Preparatória; Desenvolvimento Inicial do epitélio germinativo; Desenvolvimento Intermediário do epitélio; Desenvolvimento Final do epitélio germinativo e Regressão. Classificações similares foram descritas para outras espécies, indicando que a classificação gonadal baseada nesta proposta, pode ser aplicada a muitas espécies de peixes. Entretanto, apesar desta similaridade, o ciclo reprodutivo testicular de C. kelberi segue um padrão diferente na fase de Regressão, na qual a reestruturação gonadal e a proliferação espermatogonial ocorrem ao mesmo tempo. Deste modo, os testículos em C. kelberi nunca retornam à fase Preparatória para começar um novo ciclo reprodutivo nesta espécie. Este fato também explica a ausência de indivíduos totalmente esgotados após seu primeiro ciclo reprodutivo.

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Section: Discussionsupporting

confidence: 84%

Reproductive cycle of the Neotropical cichlid yellow peacock bass Cichla kelberi: A novel pattern of testicular development

et al. 2013

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“…Apparently, this presence can act as a spermatogenic cell reposition source, as suggested by other authors (Burns et al 1995;Matta et al 2009). Given the fact that spermatogonia were always observed throughout the year, namely during the breeding season, it seems that L. pholis males are capable of multiple spawning episodes, as already observed for other Blenniidae (Qasim 1956;Shackley and King 1977;Carrassón and Bau 2003;Shibata and Kohda 2007;Gil et al 2010).…”

Section: Discussionmentioning

confidence: 56%

“…Our methodology was similar to the one proposed by Matta et al (2009), with minor alterations. Briefly, in each male, 5 images were taken in each of two different testis sections (10 fields per individual).…”

Section: Methodsmentioning

confidence: 99%

The annual cycle of spermatogenesis in Lipophrys pholis (Blenniidae), a recently proposed sentinel species for pollution monitoring

et al. 2011

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Since reproductive parameters are common endpoints in pollution monitoring, the description of the spermatogenesis of Lipophrys pholis, a recently proposed sentinel species, is of critical importance. Mature males were used to determine the annual maturation cycle, using a stereological approach. The spermatogenic cycle was classified into three stages: early spermatogenesis (May), mid spermatogenesis (September), and spawning (November and January). The testes were asynchronously arranged with various cell types observable during all seasons, although in different proportions. Gonadosomatic index and spermatozoa proportions confirmed the established reproductive season. Differences between the sampled populations and those from septentrional locations are discussed, namely the absence of ''resting'' and ''spent'' periods.

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“…The stereological approach was designed based on point counting (Freere and Weibel 1967), using a Nikon microscope (Elipse 80i) equipped with a charge-coupled device camera (DS cooled camera Head DS-5Mc) able to record 4.9 megapixel digital images. The methodology was similar to the one proposed by Matta et al (2009), with minor alterations. Briefly, in each female, 5 images were taken in each of 2 different areas of the ovary (10 fields per individual).…”

Section: Methodsmentioning

confidence: 99%

The annual cycle of oogenesis in the shanny, <i>Lipophrys pholis</i> (Pisces: Blenniidae)

Ferreira¹,

Santos²,

Reis-Henriques³

et al. 2012

Sci. Mar.

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SUMMARY:Lipophrys pholis has been shown to be responsive to a variety of environmental contaminants, some of them able to impair reproduction. Description of the normal cycle of oogenesis of this newly proposed sentinel species is important since this data may function as a baseline for comparison in ecotoxicological studies, among other applications. Based on histological observations, L. pholis ovarian development in adult is asynchronous, and 7 ovarian germ cells can be described (oogonia, early and late perinuclear oocytes, cortical-alveolar oocytes, early vitellogenic oocytes, vitellogenic oocytes and spawning oocytes). Using a stereological approach together with the morphologic characteristics of ovarian cells, the ovarian cycle of L. pholis was divided into 3 maturation stages: early oogenesis (May); mid-oogenesis (September), and spawning (November to January). Ovarian cell proportions and gonadosomatic index confirmed that the reproductive period of L. pholis near the southern limit of distribution of the species occurs during cold-water periods, between November and May. The collected data will help to fill some of the gaps in information that still exist on L. pholis oogenesis, thus allowing a better integration of this species as a sentinel for the detection of contaminants in European coastal waters.Keywords: Lipophrys pholis, sentinel species, intertidal, oogenesis, gonadal development. RESUMEN: Ciclo anual de oogénesis en Lipophrys phoLis (Pisces: Blenniidae). -En trabajos recientes, se ha visto que Lipophrys polis es sensible a diversos contaminantes medioambientales, algunos de los cuales pueden afectar a la reproducción. La descripción del ciclo normal de oogénesis de esta nueva propuesta de especie centinela es importante, ya que serviría como referencia para futuros estudios toxicológicos, entre otras aplicaciones. En base a observaciones histológicas, se pueden describir siete estados de los oocitos (oogonia, estado perinuclear temprano y tardío, estado cortico-alveolar, vitelogénesis temprana, vitelogénesis y oocitos desovados). Desde un enfoque estereológico, junto con las características morfológicas de las células ováricas, el ciclo ovárico de L. polis se ha dividido en tres estados de maduración: oogénesis temprana (mayo), oogénesis media (septiembre) y desove (de noviembre a enero). Las proporciones de las células ováricas y el índice gonadosomático, confirmaron que el periodo reproductivo de L. polis, en el límite meridional de distribución de la especie, se produce durante los periodos de agua fría, entre noviembre y mayo. Los datos obtenidos ayudarán a cubrir algunas de las lagunas que todavía existen en el conocimiento de la ovogénesis de L. pholis, permitiendo, por tanto, una mejor integración de esta especie como centinela para la detección de contaminantes en las aguas costeras europeas.

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Reproductive biology of Oligosarcus argenteus (Gunther, 1864) adult males and description of the gonadal maturation stages

Abstract: Oligosarcus argenteus belongs to the

Cited by 6 publications

References 24 publications

Reproductive cycle of the Neotropical cichlid yellow peacock bass Cichla kelberi: A novel pattern of testicular development

Reproductive cycle of the Neotropical cichlid yellow peacock bass Cichla kelberi: A novel pattern of testicular development

The annual cycle of spermatogenesis in Lipophrys pholis (Blenniidae), a recently proposed sentinel species for pollution monitoring

The annual cycle of oogenesis in the shanny, <i>Lipophrys pholis</i> (Pisces: Blenniidae)

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