Ontogeny and embryonic description of Betta splendens, Perciformes (Regan, 1910)

The present study aimed to provide data on the time required for Melanotaenia boesemani to complete embryonic development, and to investigate the influence that incubation at different temperatures caused in this species. The effects of temperature on the time and hatching rate are presented, as well as information related to embryonic development stages. After fertilization, the eggs were kept in incubators at 23, 26, 29 or 32°C and observed at predetermined times until the moment of hatching. Stages of development were identified and classified according to morphological and physiological characteristics. Oil droplets were visualized inside the eggs as well as filament adhesion present at the chorion. Embryonic development was similar to that observed in other species of the genus Melanotaenia with hatching and faster development in higher temperatures.

Section: Discussionsupporting

confidence: 79%

Effect of temperature on embryonic development of Melanotaenia boesemani (Allen and Cross, 1982)

Radael

Cardoso

Andrade

et al. 2015

“…(2009) in his study of Heteropneustes fossilis . The blastula was considered to be late when compared with other species studied, such as Melanotaenia praecox (Radael et al ., 2013), Glossolepis incisus (Ferreira, 2007) and Betta splendens (Duarte et al ., 2012).…”

Section: Discussionmentioning

confidence: 99%

Description of the ontogenic and larval period of discus fish (Symphysodon aequifasciatus)

Mattos

Cardoso

Fosse

et al. 2014

Self Cite

The aim of this study was to describe the embryonic and larval development of discus fish (Symphysodon aequifasciatus), and to determine the time required, hours post fertilization (hpf), for the emergence of various structures. To describe embryonic and larval stages, observations were made at regular periods under an optical microscope and images were taken with a digital camera attached to a microscope. The average temperature reached in the experimental tank was 27.9°C. Important facts in embryonic and larval development are described, such as the closure of the blastopore, which occurred at 31.5 hpf; a period of eruption, which occurred at 58.5 hpf; and a mouth opening, which occurred at 90.5 hpf; and larvae that exhibited oriented swimming and eating exogenous food at 136.5 hpf.

“…At the time of spawning, the male T. leeri puts the eggs into a bubble nest, showing parental care, as seen in Betta splendens and Hoplosternum littorale species (Nakatani et al 2001; Duarte et al 2012).…”

Section: Discussionmentioning

confidence: 99%

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

Pereira

Andrade

Radael

et al. 2016

Self Cite

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.