Biologia reprodutiva de Micropogonias furnieri (Desmarest, 1823) (Teleostei, Sciaenidae): 1. Fator de condição como indicador do período de desova

Isaac-Nahum, Victoria J.; Vazzoler, Anna Emília Amato de Morais

doi:10.1590/s0373-55241983000100006

Cited by 32 publications

(18 citation statements)

References 5 publications

(1 reference statement)

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“…This indicates an accumulation of reserves to accomplish reproduction, and by decreasing drastically during that period, caused by the expenditure of energy in such activity. Similar behavior was observed by Le Cren (1951), Rossi-Wongtschowski (1977), Isaac-Nahum & Vazzoler (1983); Barbieri (1992Barbieri ( , 1995 and Silva et al (2005;2007) in other fish species. The analysis of gonadal maturation confirm the above findings, indicating that the reproductive period of the species begins in September and extends to the end of December, with a peak in November.…”

Section: Discussionsupporting

confidence: 83%

Iheringichthys labrosus (Siluriformes: Pimelodidae) in the Piquiri River, Paraná, Brazil: population structure and some aspects of its reproductive biology

Holzbach¹,

Gubiani

Baumgartner

2009

Neotrop. ichthyol.

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Section: Discussionsupporting

confidence: 83%

Iheringichthys labrosus (Siluriformes: Pimelodidae) in the Piquiri River, Paraná, Brazil: population structure and some aspects of its reproductive biology

Holzbach¹,

Gubiani

Baumgartner

2009

Neotrop. ichthyol.

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“…IsaacNahum & Vazzoler (1983) stated that the intense pace in the development of female gonads usually have a direct influence on total weight and changes to body shape throughout the reproductive cycle.…”

Section: Discussionmentioning

confidence: 99%

Population structure and reproductive biology of Loricariichthys melanocheilus Reis & Pereira, 2000 (Siluriformes: Loricariidae) in the rio Ibicuí, Brazil

Zardo

Behr

2015

Neotrop. ichthyol.

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The objective of this study was to analyze population structure (spatial distribution, seasonal distribution and distribution by length classes, sex ratio and length-weight relationship) and aspects of the reproductive biology of Loricariichthys melanocheilus. Fish were sampled bimonthly using gillnets and trammel nets in lentic and lotic environments in the rio Ibicuí, between the years 2000 and 2001. Were collected 410 specimens: 230 females, 164 males and 16 specimens whose sex could not be determined. A greater number of specimens were collected in October/November and December/January and in lentic environments. The greater length classes had a higher amount of females ( p < 0.05) and the sex ratio in all sampling periods was 1.38 females per male. Both males and females showed positive allometric growth (b = 3.299 and b =3.487, respectively). The highest values for gonadosomatic index (GSI) and gonadal condition factor (K) were observed from August/September and peaked in October/November, just like the highest frequencies of females at maturity stage C (mature), which is indicative that the breeding season occurs at this time.O objetivo deste trabalho foi analisar a estrutura populacional (distribuição espacial, sazonal e por classes de comprimento, proporção sexual e relação peso-comprimento) e aspectos da biologia reprodutiva de Loricariichthys melanocheilus. Os peixes foram amostrados bimestralmente com redes de espera e feiticeiras em ambientes lêntico e lóticos no rio Ibicuí, entre os anos de 2000 e 2001. Foram capturados 410 indivíduos: 230 fêmeas, 164 machos e 16 indivíduos que não foi possível determinar o sexo. Foi capturado um maior número de indivíduos em outubro/novembro e dezembro/janeiro e em ambientes lênticos. As classes de comprimento superiores apresentaram maior quantidade de fêmeas ( p < 0.05) e a proporção sexual em todos os períodos amostrados foi de 1,38 fêmeas para cada macho. Tanto os machos quanto as fêmeas apresentaram crescimento alométrico positivo (b = 3.299 and b =3.487, respectivamente). Os maiores valores do Índice Gonadossomático (IGS) e do fator de condição gonadal (K) foram observados a partir de agosto/setembro, com pico em outubro/novembro, assim com as maiores frequências de fêmeas em estádio de maturação C (maduro), indicando que o período reprodutivo se dá nesta época.

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“…A interpretação macroscópica deste material baseou-se na literatura corrente (ISAAC-NAHUM & VAZZOLER 1983;VAZZOLLER 1996;BAZZOLl & GODINHO 1991;MA-ZZONE & CARAMASCHl 1997).…”

Section: Methodsunclassified

Indicadores reprodutivos de Parauchenipterus striatulus (Steindachner) (Pisces, Auchenipteridae) na Represa de Ribeirão das Lajes, Rio de Janeiro, Brasil

et al. 1999

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ABSTRACT. Reproductive indicators of Paraucheniplerus slrialu/us (Steindachner) (Pisces, Auchenipteridae) in the Ribeirão das Lajes reservoir, Rio de Janeiro, Brasil. Parauchenipterus striatulus is a representative of the freshwater catfish with wide distribution in the South America region. Despite of being a very abundant fish in rivers and reservoirs of this region, little is known about its biology and ecology. ln Ribeirão das Lajes reservoir (22°42'S -22°50'S, 43°53'-44°05'W, Rio de Janeiro), the Rio de Janeiro state's largest hydroelectric reservo ir, this species is very abundant, representing about40% ofthe total experimental lish catches using gil l nets. This papel' aims to assess aspects of the reproductive cycle of this species descri bing the gonadal stages, gonadosomatic index, weight-Iength relationship and condition factor. Fish sampling were calTied out bi-monthly, between April 1996 and May 1997. Gill nets used were 100 m long, 4 m high with mesh size between 25 and 65 mm. Macroscopic analysis of339 individuaIs were performed for the detelmination of 5 maturation stages, for both sexes (immature, maturation I, maturation II , ripe, spawned (females) and emptied (males). The gonadosomatic index for both sexes was higher from October to March, suggesting a long spawning period while the condition factor was higher Irom February to June, showing an inverse relationship between these two parameters. Wei~ht-Iength relationship for males was W= 0,0095L 3 ,0862 and for females W= 0,0116L 3 . 126, and no significant differences were shown between sex with reference to the alometry coefticient. KEY WORDS. Auchenipteridae, length-weight relationship, reproduction, condition factor, gonadosomatic index, reservoir A família Auchenipteridae, à qual pertence Parauchenipterus striatllllls (Steindachner, 1876), vulgarmente conhecido como cangati ou cumbaca, encontrase distribuída em rios de água doce de toda a região neotropical da América do Sul tropical estendendo-se desde a Argentina até o Panamá (NELSON 1976). É o único representante desta família encontrada na região da Represa Hidrelétrica de Ribeirão das Lajes e pouco se conhece sobre sua condição e biologia reprodutiva apesar de ser uma das mais abundantes com cerca de 40% do total das capturas experimentais.

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Biologia reprodutiva de Micropogonias furnieri (Desmarest, 1823) (Teleostei, Sciaenidae): 1. Fator de condição como indicador do período de desova

Cited by 32 publications

References 5 publications

Iheringichthys labrosus (Siluriformes: Pimelodidae) in the Piquiri River, Paraná, Brazil: population structure and some aspects of its reproductive biology

Iheringichthys labrosus (Siluriformes: Pimelodidae) in the Piquiri River, Paraná, Brazil: population structure and some aspects of its reproductive biology

Population structure and reproductive biology of Loricariichthys melanocheilus Reis & Pereira, 2000 (Siluriformes: Loricariidae) in the rio Ibicuí, Brazil

Indicadores reprodutivos de Parauchenipterus striatulus (Steindachner) (Pisces, Auchenipteridae) na Represa de Ribeirão das Lajes, Rio de Janeiro, Brasil

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