Effect of temperature during embryonic development and first feeding of Trichogaster leeri larvae

Abstract

Temperature is an environmental factor that influences the development of fish, and when changed abruptly can lead to high mortality. Some species of fish are influenced by this factor, exhibiting a longer time for embryonic development and time to first feeding. This study aims to evaluate the effect of water temperature on embryonic and larval development up to first feeding, to describe the time in hours post fertilization (hpf) of the emergence of different structures and to determine the best hatching rate and survival of animals under different treatments. Five different egg incubation temperatures were used (24, 26, 28, 30 or 32°C, respectively). The eggs were observed at regular intervals of 30 min up to 24 h, every 2 h until 48 h and every 4 h until the display of first feeding in all treatments. Embryonic development was longer for eggs incubated at 24°C and the best results for hatching rate and survival of spawning efficiency were at 28°C. We recommend that incubation of Trichogaster leeri eggs is carried out at 28°C up to the first feeding of larvae.

Effect of temperature on embryonic development and first exogenous feeding of goldfish Carassius auratus (Linnaeus, 1758)

“…As was the case in the present study, Pype et al (2015), working with zebrafish (D. rerio), also observed a decrease in hatching time with increasing temperature until the maximum tolerated limit was reached. Pereira et al (2016) and Radael et al (2016) also reported a decrease in hatching time with increasing temperature in Trichogaster leeri and Melanotaenia boesemani, respectively; however, in contrast to the present experiment, they did not determine the maximum limit tolerated by these species.…”

“…As was the case in the present experiment, an acceleration of the time of occurrence of events related to temperature increases has been reported for other freshwater teleost species (Radael et al, 2016;Pereira et al, 2016). The delay in the occurrence of events during embryogenesis correlated with a temperature decrease may be due to the effect of temperature on cell division through the mitotic cycle.…”

“…Within this context, the data of the present experiment only permit to state that, after fertilization, the temperature does not affect egg size. Pereira et al (2016) also did not observe any difference in the diameter of T. leeri eggs incubated at different temperatures.…”

“…For fish, during embryonic stage, there is a temperature range that promotes better development and hatching rate, a characteristic that may vary among different species (Radael et al, 2016;Thépot and Jerry, 2015;Pereira et al, 2016). When the issue of the influence of temperature is considered by the fish production chain, the environment can be controlled to meet the demands of the species.…”

Effects of simulating warming and heat waves on behaviour and survival after reproductive in Rana dybowskii

“…An essential sign of frog survival is the capacity to resume eating following hibernation [39]. Temperature may have an impact on the timing of the rst meal following postreproductive activity [47]. Many temperate frogs experience short-term postreproductive dormancy and fasting; certain species, including R. chensinensis, may not enter postreproductive dormancy.…”