Thermal influence on the embryonic development and hatching rate of the flameback pygmy angelfish Centropyge aurantonotus eggs

Abstract

SummaryThe flameback pygmy angelfish Centropyge aurantonotus, highly appreciated and valued by the aquarium market, is heavily harvested and traded. Temperature is one of the abiotic factors that has the most influence on fish development, especially in the early stages of life. For captive production, it is essential to know the appropriate environmental parameters for each species. In this sense, this study aimed to evaluate the influence of temperature on the embryonic development and hatching rates of C. aurantonotus incubated at six different temperatures (20, 22, 24, 26, 28, 30°C). Embryonic development events were very similar in terms of morphological and chronological characteristics compared with other species of the genus Centropyge. Incubation time was inversely proportional to temperature. The treatment at 22°C required twice the time of that required by 30°C treatment for hatching to occur. The best incubation temperature range was 24–28°C. Values below 22°C and at 30°C showed lower hatching rates compared with other treatments. Based on these results, the recommended temperature at which to incubate C. aurantonotus eggs is between 24–28°C.

The first successful land-based larviculture of narrow-barred Spanish mackerel (Scomberomorus commerson) and the assessment of optimal water conditions for larval survival using response surface methodology

“…Numerous studies have demonstrated the notable in uence of water quality parameters, speci cally temperature and salinity, on the hatching of sh eggs and the survival of larvae in marine environments (Chiu and Leu 2021; Groover et al 2021; Mendonça et al 2020). The present study focused on evaluating the larval survival of S. commerson up to the 3 dph, a critical period coinciding with the depletion of the yolk sac and the commencement of feeding, to mitigate the impact of starvation on larval viability (Chiu and Leu 2021; Chiu et al 2023).…”

“…During the early developmental stages of marine sh, temperature and salinity play critical roles in in uencing their growth, development, viability, and survival (Mendonça et al 2020; Chiu and Leu 2021; Groover et al 2021;Jin et al 2022). Typically, in efforts to determine the optimal temperature and salinity conditions for speci c marine sh, researchers expose fertilized eggs to different temperature and salinity levels.…”

Captive Reproductive Behavior, Spawning, and Early Development of White-Barred Goby Amblygobius phalaena (Valenciennes, 1837) and Examined Larval Survival and Viability at Different Water Temperatures and Salinities

“…In other studies on marine ornamental fish, it has been shown that when the water temperature increases over 30 • C, there is a negative effect on the larvae, such as in I. ornatus (exhibiting a lower SAI at 32 • C) [16], dwarf hawkfish Cirrhitichthys falco (exhibiting a lower SAI and higher deformity at 30-32 • C) [35], longfin batfish Platax teira, and bluestreak cleaner wrasse Labroides dimidiatus (demonstrating a lower hatching rate and yolk sac volume at 30-33 • C) [33,34]. In studies on Melanurus wrasse Halichoeres melanurus and flameback pygmy angelfish Centropyge aurantonotus, lower survival and hatching rates were found at water temperatures of 22 • C [36], 22 • C, and 30 • C [75]. Therefore, the optimal range of incubation water temperature was species-specific.…”

The influence of salinity on egg incubation and early larval development of the flameback angelfish Centropyge aurantonotus

“…This mortality is possibly associated with morphological and physiological limitations of the angelfishes larvae, such as reduced body and mouth size, and specific nutritional requirements (Baensch, 2017), making the first exogenous feeding difficult. Furthermore, abiotic factors, such as temperature (Mendonça, Ikebata, et al, 2019; Mendonça, Mattos, et al, 2019), photoperiod (Holt & Riley, 2001) and salinity (Olivotto et al, 2017), influence the development of the dwarf angelfishes embryo and yolk sac larvae.…”