El estudio de los aspectos reproductivos y de la ontogenia de los peces migradores es de gran importancia en piscicultura, especialmente cuando se trata de especies nativas, resaltándose los patrones de crecimiento y desarrollo. El objetivo del presente trabajo fue hacer una compilación del conocimiento actual de la ontogenia de sábalo, Prochilodus lineatus, en las fases de embrión y larva, bajo ambientes fóticos variables y desde la perspectiva de la capacidad adaptativa del fenotipo. Además, se revisaron casos de otras especies bajo cultivo o con potencial productivo. Así, la utilización de los cambios en los regímenes de luz y oscuridad han permitido acelerar o retrasar la reproducción y las tasas de crecimiento, así como el desarrollo embrionario y larval en peces. No obstante, los datos se encuentran dispersos y en algunos casos existen vacíos de información sobre estas...

The study of reproductive aspects and ontogeny of migratory fish is relevant in pisciculture, especially when it is related to native species, emphasizing the patterns of growth and development of these taxa. The present research aimed to make a compilation of current knowledge on the ontogeny of sabalo, Prochilodus lineatus, in embryonic and larval stages, under varying photic environments and the adaptive capacity of the phenotype. Besides, the cases of other species currently cultivated or potentially productive in this stages were reviewed. Thus, the manipulation of light and darkness regimes has allowed to move forward or backwards the onset of reproduction and improve growth rates, as well as the embryonic and larval development in fish. Nevertheless, data is dispersed and in some cases there are information gaps, especially on migratory fish species in Brazil, including the sabalo...

The optimal temperature range (RTO) and critical temperatures (CTmax, CTMin) of the respiratory rate (TR), and feeding (CA) and self-defence (CD) behaviour of Bothrops asper in captivity conditions were determined. Adult snakes (n=10) with a size of 137.2±17.2 cm and weight of 829.0±378.9 g were used and subjected to experimental temperatures between 10 and 40 °C and gradual changes of 3 °C per minute, except for catching their feed (4 °C per week). The RTO was between 21 and 31 °C for TR (22.9±5.1 resp/min), 27 to 31 °C and 26 to 30 °C for CA and CD, respectively. CTmax and CTMin were 39 °C and 15.5 °C for TR, 34.7 °C and 20 °C for CA and 33 °C and 21.7 °C for CD, respectively. Temperatures and ecophysiological variables were correlated in most cases (R=0.67, p=0.000), with a higher sensitivity to high thermal recordings. These data showed that temperature acts as a modul...

The optimal temperature range (RTO) and critical temperatures (CTmax, CTMin) of the respiratory rate (TR), and feeding (CA) and self-defence (CD) behaviour of Bothrops asper in captivity conditions were determined. Adult snakes (n=10) with a size of 137.2±17.2 cm and weight of 829.0±378.9 g were used and subjected to experimental temperatures between 10 and 40 °C and gradual changes of 3 °C per minute, except for catching their feed (4 °C per week). The RTO was between 21 and 31 °C for TR (22.9±5.1 resp/min), 27 to 31 °C and 26 to 30 °C for CA and CD, respectively. CTmax and CTMin were 39 °C and 15.5 °C for TR, 34.7 °C and 20 °C for CA and 33 °C and 21.7 °C for CD, respectively. Temperatures and ecophysiological variables were correlated in most cases (R=0.67, p=0.000), with a higher sensitivity to high thermal recordings. These data showed that temperature acts as a modul...