2021
DOI: 10.4025/actascibiolsci.v43i1.56235
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Reproduction and fecundity of invader of internal insemination Trachelyopterus galeatus in a Neotropical floodplain

Abstract: After the formation of Itaipu Reservoir, the invader Trachelyopterus galeatus colonized the upper Paraná River. Light microscopy was used to describe gametogenesis and the reproductive phases of females and males. The following data were verified: diameter of the oocytes, spawning type, batch fecundity by ovary weight, standard length, and total weight of the fish, along with the regions where this species reproduced in the upper Paraná River floodplain. A total of 470 specimens were collected quarterly in 201… Show more

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