Effects of Different Light Spectra on the Oocyte Maturation in Grass
                    Puffer Takifugu niphobles

Choi, Soyoung; Kim, Byeong‐Hoon; Hur, Sung‐Pyo; Lee, Chi-Hoon; Lee, Young‐Don

doi:10.12717/dr.2018.22.2.175

Cited by 5 publications

(3 citation statements)

References 17 publications

(19 reference statements)

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“…Eight 0.72 W LEDs with a light intensity of about 580 lux were placed 22-25 cm above the water surface, and the irradiance at the water surface was maintained at approximately 14 W/m 2 (Figure 1). puffer, T. rubripes [27], and on maturation in grass puffer [21]. The to determine the effects of various light spectra on growth and g juvenile red spotted grouper.…”

Section: Experimental Fish and Conditionsmentioning

confidence: 99%

“…The effects of light spectra on maturation and reproduction are directly achieved by altering the secretion of gonadotropins (GtHs) in the pituitary gland, which has been reported in the European perch, Perca fluviatilis [ 20 ], and grass puffer, Takifugu niphobles [ 21 ]. Two types of GtHs, follicle-stimulating hormone (FSH) and luteinizing hormone (LH), are regulated by gonadotropin-releasing hormone (GnRH) in the hypothalamus [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

“…Shin, Habibi, and Choi [ 25 ] and Choi et al [ 26 ] reported the effects of light spectra on the reproduction-related hormones in the BP axis in goldfish, Carassius auratus . In our recent study, we showed that light spectra had great effects on growth in tiger puffer, T. rubripes [ 27 ], and on maturation in grass puffer [ 21 ]. Therefore, this study aimed to determine the effects of various light spectra on growth and gonadal development in juvenile red spotted grouper.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Various LED Light Spectra on Growth, Gonadal Development, and Growth-/Reproduction-Related Hormones in the Juvenile Red Spotted Grouper, Epinephelus akaara

Zou

Zeng

et al. 2023

Animals

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The light spectrum is a key environmental cue involved in growth and reproduction in teleosts. This study investigated the effects of exposure on juvenile red spotted grouper exposed to white (control), red (590 nm), blue (480 nm), and green (520 nm) light-emitting diodes (LEDs) (12 h light:12 h dark) for two months. The body weight (BW), total length (TL), condition factor (CF), weight gain rate (WGR), gonadosomatic index (GSI), and hepatosomatic index (HSI) were assessed. Gonadal development was observed. The gene expression of growth-related hormones, such as growth hormone (GH), pre-pro-somatostatin-I (PSS-I), neuropeptide Y (NPY), and CCK, and of reproduction-related hormones, such as Kiss1, Kiss2, GPR54, sbGnRH, FSHβ, and LHβ, was analyzed. The results showed that the fish in the white LED group exhibited the best BW, TL, CF, WGR, and HSI after one or two months. The fish exposed to white LEDs showed the best growth after two months, but no significant differences in GH levels were detected. Contrarily, the expression levels of the PSS-I significantly increased (p < 0.05) in fish from the white group, suggesting the complex regulation of GH production and the limited effects of PSS-I on the inhibition of GH synthesis and somatic growth. The significantly increased NPY levels in the four LED groups (p < 0.05) indicated that these four LED spectra were effective in stimulating food intake and energy homeostasis. After two months, the gonads developed from chromatin nucleolar-stage oocytes to perinucleolar-stage oocytes in the four LED groups. The gene expression of Kiss2 and GPR54 in the four LED groups and of sbGnRH in the white and blue LED groups significantly increased when compared to that in the initial group (p < 0.05), while there were no significant differences in FSHβ and LHβ expression in the four LED groups. These results suggest that FSH and LH may not play important roles in gonadal development in juvenile red spotted grouper that are exposed to these four LED spectra.

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Section: Experimental Fish and Conditionsmentioning

confidence: 99%