Reproductive seasonality of the detritivorous fish Cyphocharax abramoides (Kner, 1958) (Characiformes: Curimatidae) in flooded rivers of the eastern Amazon

Comparing three methods to estimate the average size at first maturity: A case study on a Curimatid exhibiting polyphasic growth

“…Similar to others species from the genus Cyphocharax, C. abramoides presents multiple spawning events throughout the year, with one peak related to pluviometric period (Hashiguti, Rocha, & Montag, 2017).…”

“…According to Hashiguti et al (2017), the gonads of both sexes are macroscopically different regarding colour pattern, size, consistency and vascularisation for each gonadal development stage and the macroscopic identification can be used to classify gonadal stages.…”

“…We first considered the classical approaches: a logistic model using the total length according to a proportion of mature fishes that were classified in two different ways, (a) by determining the gonadal stage macroscopically; and (b) by using the GSI as proxy of sexual maturity. Similar to others species from the genus Cyphocharax, C. abramoides presents multiple spawning events throughout the year, with one peak related to pluviometric period (Hashiguti, Rocha, & Montag, 2017). The proposed methods were applied using data of Cyphocharax abramoides (Kner, 1858), a detritivorous Amazonian Curimatidae chosen for its abundance (Ayres- Santos, Freitas, & Montag, 2018), monthly reproduction, and well identifiable gender and maturation status.…”

Reproductive biology of Silver Croaker (Plagioscion squamosissimus) species of fishery importance in the Lower Amazon, Pará, Brazil

“…According to Godinho et al (2010) the reproductive period of P. squamosissimus is similar to most tropical freshwater fish, where gonads are mature at the time of river level rise. Lowe-McConnell (1999), Agostinho et al (2004), Bailly et al (2008), Hashiguti et al (2017) also affirm that the period of rising waters is the most favorable for spawning because it provides a greater supply of shelter and food for the offspring, as this reproductive strategy should ensure the survival of as many offspring as possible.…”

Age, growth, reproductive biology and mortality of Cranoglanis multiradiatus , a threatened freshwater fish in Hainan Island, China

“…The variation of GSI correlated with water temperature during months with high mean water temperatures. Water temperature and rainfall are important factors influencing fish spawning (Hashiguti et al, 2017). May to October is the rainy season in Hainan Island, the water temperature during the spawning season ranged from 20.3℃ to 32℃, with mean of 27.48℃.…”