Descrição histológica de gônadas de traíra Hoplias malabaricus (Bloch) (Osteichthyes, Erythrinidae) da barragem do rio Gramame, Alhandra, Paraíba, Brasil

Marques, D. K. S.; Rosa, Ierecê de Lucena; Gurgel, Hélio de Castro Bezerra

doi:10.1590/s0101-81752000000300002

Cited by 21 publications

(24 citation statements)

References 2 publications

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“…5, where female GSI values are highly variable from November to January. This particular reproductive pattern of trahira has been reported by earlier studies (Paiva, 1974;Marques et al, 2001;Bialetzki et al, 2002;Rosso, 2007). The presence of those cohorts was validated by the agreement between the maximum number of observed rings and the number of unimodal components in the ring-frequency distribution.…”

Section: Discussionsupporting

confidence: 86%

“…This kind of population response (countergradient effect) has been found in other fish species (Conover, 1990;Conover & Present, 1990;Power & McKinley, 1997). At lower latitudes where temperature stays over the maximum value for food conversion by the species all the time, thus generating high metabolic rates and more continuous prey consumption, the reproductive season appears to extend from October to June (Barbieri, 1989;Marques et al, 2001) and is influenced by temperature and precipitation (Marques et al, 2001). In pampean lakes, spawning occurs only in the late spring and early summer, at the start of the favorable season for the species.…”

Section: Discussionmentioning

confidence: 56%

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Biology of growth of Hoplias aff. malabaricus (Bloch, 1794) in a shallow pampean lake (Argentina)

Balboni¹,

Colautti

Baigún

2011

Neotrop. ichthyol.

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The trahira Hoplias aff. malabaricus is a top predator in pampean shallow lakes and is highly appreciated by recreational anglers and artisanal fishermen. Trahira growth from Yalca shallow lake was determined by lepidological analysis and age validated by marginal increment. When growth was fitted to the von Bertalanffy model, annual classes exhibited a bimodal pattern as a result of the presence of spring and summer annual cohorts associated with a three month spawning season, each period in turn showing different growth patterns. The trahira population-age structure at Yalca shallow lake showed a truncated profile with very low numbers of large adults and few individuals older than three to four years, thus producing an unbalanced length-structure population. Growth parameters and growth performance were similar to the corresponding parameters estimated for other shallow pampean lakes of the region, but strongly diverged from the data for those populations inhabiting subtropical and tropical environments. Such differences could be accounted for by dissimilarity in metabolic rates associated with thermal differences accompanying seasonal variability among latitudes as well as by the development of adaptive physiologic and demographic responses to cope with the high thermal amplitude and hydrologic instability observed in pampean lakes.A traíra Hoplias aff. malabaricus é um predador de topo encontrado em lagoas rasas nos Pampas, muito apreciada nas pescas comerciais e esportivas. O crescimento da traíra no lago Yalca foi determinado através de análises lepidológicas, validadas a partir do incremento marginal. O crescimento foi ajustado ao modelo de von Bertalanffy, sendo que as classes de tamanho anuais apresentaram padrão bimodal devido à presença de coortes de primavera e verão, associadas à uma longa estação reprodutiva com diferentes padrões de crescimento. A estrutura etária da traíra do lago Yalca apresentou um perfil truncado, com um número pequeno de adultos de maior porte e poucos indivíduos com mais de três ou quatro anos, produzindo uma estrutura em tamanho desbalanceada. Os parâmetros e a performance de crescimento foram similares aos estimados para outros lagos rasos da região, mas fortemente divergentes de populações encontradas em ambientes tropicais e subtropicais. Tais diferenças podem estar relacionadas à diferentes taxas metabólicas associadas à variação térmica sazonal entre latitudes e ao desenvolvimento de respostas adaptativas fisiológicas e demográficas em resposta aos padrões termais altamente variáveis e instabilidade hidrológica observados nos lagos da região dos Pampas.

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Section: Discussionsupporting

confidence: 86%

Section: Discussionmentioning

confidence: 56%

Biology of growth of Hoplias aff. malabaricus (Bloch, 1794) in a shallow pampean lake (Argentina)

Balboni¹,

Colautti

Baigún

2011

Neotrop. ichthyol.

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“…The cystic arrangement of the trahira testis was similar to that found in most teleosts (BILLARD 1986, MIURA 1999, GRIER & NEIDIG 2000 and its histology corresponded to the description given by MARQUES et al (2000). The seminiferous tubule arrangement is of the anastomosing lobular type (PARENTI & GRIER 2004) in which the germinal compartment does not end in the testis periphery but forms highly branched loops or tubules.…”

Section: Discussionsupporting

confidence: 77%

Morphometric evaluation of the spermatogenesis in trahira Hoplias malabaricus (Bloch) (Characiformes, Erythrinidae)

Bizzott

Godinho²

2007

Rev. Bras. Zool.

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The Erythrinidae trahira, Hoplias malabaricus (Bloch, 1794), is widespread throughout South America river basins. We determined Sertoli cell supporting capacity (ratio of primary spermatocytes: Sertoli cells and spermatids: Sertoli cells), meiotic index (ratio of spermatids: primary spermatocytes) and the number of spermatogonial mitotic generations of this fish. The fish were captured in the Igarapava reservoir, Grande River, Alto Paraná River basin, Brazil. Testis fragments of three sexually mature trahiras were fixed in 5% buffered glutaraldehyde solution and embedded in glycol methacrylate. Serial sections of 2 and 3 µm in thickness were stained with 0.5% toluidine blue. Histological counts from cysts of primary spermatocytes and spermatids revealed, respectively, 326 ± 99 and 468 ± 73 nuclei of these cells. Sertoli cell supporting capacity was considerably higher for spermatids (113.3 ± 16:1) when compared to primary spermatocytes (71 ± 5:1). Between eight and ten spermatogonial generations were formed to give rise to primary spermatocytes. These values were within the generation range of those already found in freshwater teleosts of external fertilization. Correlation between the number of Sertoli cells and primary spermatocytes per cyst, and Sertoli cells and spermatids per cyst were statistically significant (p < 0.05).

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“…Other studies, conducted in different regions throughout South America, showed that the period of reproduction is variable for the species. Reproduction may occur during months of high rainfall in some sites (e.g., state of São Paulo, Brazil, Caramaschi & Godinho, 1982;Barbieri, 1989;Argentina, Matkovic & Pisanó, 1989b;Domanico et al 1993;central Amazonia, Brazil, Araújo-Lima & Bittencourt, 2001; State of Paraíba, Brazil, Marques et al, 2001), such as the data registered in this study for the south Pantanal, but also during periods of drought and lower temperatures in other regions (upper Paraná river floodplain, States of Paraná and Mato Grosso do Sul, Brazil, Bialetzki et al, 2002).…”

Section: Discussionmentioning

confidence: 99%

Spawning and parental care in Hoplias malabaricus (Teleostei, Characiformes, Erythrinidae) in the Southern Pantanal, Brazil

Prado¹,

Gomiero

Froehlich

2006

Braz. J. Biol.

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Herein we describe spawning and egg guarding in the erythrinid fish Hoplias malabaricus observed in the southern Pantanal (19° 34' S and 57° 00' W), state of Mato Grosso do Sul, Brazil. Nests were depressions built on sandy soil in flooded areas, and contained a mean of 8,197 ± 2,204 eggs (N = 4); the mean diameter of eggs was 1.44 ± 0.09 mm (N = 400). Among 11 nests observed, eight were guarded by males and three by the pair. One male remained in the nest for six days, and two pairs remained guarding the eggs for at least three days before being captured. Females (N = 2) captured in the nest contained oocytes in their ovaries. Our observations suggest that male parental care is the normal form of parental care in H. malabaricus, but biparental care also seems to occur. No presente estudo, descrevemos os comportamentos de desova e cuidado parental para um membro da referida família, Hoplias malabaricus, os quais foram observados no Pantanal sul (19° 34' S e 57° 00' W), Estado de Mato Grosso do Sul, Brasil. As desovas foram observadas no início da cheia, depositadas em ninhos construídos em substrato arenoso em áreas alagadas. As desovas continham, em média, 8.197 ± 2.204 ovos (N = 4); o diâmetro médio dos ovos foi de 1,44 ± 0,09 mm (N = 400). Entre 11 ninhos observados, oito foram guardados por machos e em três observamos o casal. Um macho permaneceu no ninho por seis dias, e dois casais foram observados por três dias no ninho até serem capturados. As fêmeas (N = 2) capturadas nos ninhos continham óvulos nos ovários. O cuidado parental em Hoplias malabaricus é normalmente exercido pelos machos, mas nossas observações sugerem que o cuidado biparental pode ocorrer de forma facultativa.Palavras-chave: reprodução, cuidado parental, Hoplias malabaricus, Erythrinidae, Pantanal.

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Descrição histológica de gônadas de traíra Hoplias malabaricus (Bloch) (Osteichthyes, Erythrinidae) da barragem do rio Gramame, Alhandra, Paraíba, Brasil

Cited by 21 publications

References 2 publications

Biology of growth of Hoplias aff. malabaricus (Bloch, 1794) in a shallow pampean lake (Argentina)

Biology of growth of Hoplias aff. malabaricus (Bloch, 1794) in a shallow pampean lake (Argentina)

Morphometric evaluation of the spermatogenesis in trahira Hoplias malabaricus (Bloch) (Characiformes, Erythrinidae)

Spawning and parental care in Hoplias malabaricus (Teleostei, Characiformes, Erythrinidae) in the Southern Pantanal, Brazil

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