Oocytes of The Endangered Gray Catfish (Surubim-Do-Paraiba) Submitted to Different Conservation Protocols.

Background: The gray catfish known as Surubim-do-Paraíba (Steindachneridion parahybae), which is endemic to the Paraíba do Sul river basin, is on the red list of Brazilian fauna threatened with extinction and the cryopreservation of germ cells of this fish is needed in support of conservation.

Objective: We aimed to assess the effect of storage temperature on S. parahybae mature and immature oocytes.

Reproductive strategies and chromosomal aberrations affect survival in the Rivuliid fish .

Rivulidae comprises a family of fish largely distributed in Brazil that includes 201 species, of which 125 are considered endangered. This fact emphasizes the need for development of conservation strategies including studies on genetics and reproduction. In this paper, we describe aspects of biology and reproduction of the rivuliid species Hypsolebias sertanejo.

Erratum to "Chilling sensitivity of (Siluriformes: Pimelodidae) oocytes in different cryoprotectants" [7C (June 2019) 100046].

[This corrects the article DOI: 10.1016/j.vas.

Chilling sensitivity of (Siluriformes: Pimelodidae) oocytes in different cryoprotectants.

The viability of post-thaw fish oocytes can be affected by different stages of the freezing process, such as cryoprotectant toxicity, cold sensitivity, freezing curves and thawing. Therefore, these steps need to be investigated for the development of a protocol. In the present study, the aim was to investigate chilling sensitivity at different oocyte stages of .

Colossoma macropomum females can reproduce more than once in the same reproductive period.

The aim of the present study was to evaluate induced reproduction in Colossoma macropomum females at the beginning of the reproductive period and 75 days after the first spawning in which reproduction was induced. The experiment was conducted in Nova Mutum, MT, Brazil. Eight 4-year-old C.