Annual changes in ovarian development stages of farmed female red‐spotted grouper, <i>Epinephelus akaara</i>, and inducing sexual maturity using photoperiod manipulation

Kim, Byeong‐Hoon; Choi, Soyoung; Lee, Young‐Don; Lee, Chi‐Hoon

doi:10.1111/jwas.12913

Cited by 3 publications

(2 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, the deployment of artificial reefs in specific areas to restore fishery resources has been extensively practised both domestically and internationally. Epinephelus akaara mostly inhabits the interior of tubular reefs or the narrow crevices between reefs and the shaded areas covered by reefs, while larger reef models can yield greater fish-gathering effects [ 8 ]. Paralichthys olivaceus prefers to inhabit sandy or rocky areas.…”

Section: Introductionmentioning

confidence: 99%

Habitat Enrichment Causes Changes in Fish Behavioural Characteristics: A Case Study of Sparus latus

Guo,

Chen,

Qin

et al. 2024

Biology

View full text Add to dashboard Cite

To better understand the habitat preferences and behavioural ecology of Sparus latus, we performed an experiment using box-shaped reefs as habitat enrichment materials, allowing us to determine the behavioural strategies and drivers involved in the response to different enrichment structures. The results showed that the first contact time of S. latus was negatively correlated (Pearson’s correlation, p < 0.005) with the distribution rate in the artificial reef area. Enrichment structures affected the habitat preferences of S. latus, and there was a significant difference in the average distribution rate between the control and treatment groups (Adonis, p < 0.001). The opening ratio (Adonis, R2 = 0.36) explained the distribution difference of S. latus better than the opening shape (Adonis, R2 = 0.12). In the absence of an enrichment structure, S. latus remained more active during the daytime, exhibiting poor clustering, while in the presence of an enrichment structure, S. latus exhibited clustered movement at night. The opening ratio was negatively correlated with the average interindividual distance (Spearman’s correlation, p < 0.01) and showed a significant positive correlation with the average distribution rate in the reef area (Spearman’s correlation, p< 0.001), indicating that the reef opening ratio significantly affected the reef-tropism and clustering behaviours of S. latus. The light intensity was negatively correlated with the average distance moved, and the average speed (Spearman’s correlation, p < 0.05) was significantly positively correlated with the reef first contact time (Spearman’s correlation, p < 0.001), indicating that the light intensity affected the exploration and activity patterns of S. latus. These results provide a research basis for analysing the pattern and process of fish proliferation induced by artificial reef habitats

show abstract

Section: Introductionmentioning

confidence: 99%

Habitat Enrichment Causes Changes in Fish Behavioural Characteristics: A Case Study of Sparus latus

Guo,

Chen,

Qin

et al. 2024

Biology

View full text Add to dashboard Cite

show abstract

“…The red spotted grouper, Epinephelus akaara , is widely distributed in China, Japan, Korea, and other Asian countries and is recognized as one of the most important marine fish due to its high-quality meat and good commercial value [ 1 ]. Recently, most studies focused on the effects of environmental factors, such as water temperature and photoperiods [ 2 , 3 ], on the growth and development of this species. However, there are also reports that light spectra can influence the entire life cycle of teleost fish, from embryonic development to sexual maturation [ 4 , 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

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

View full text Add to dashboard Cite

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.

show abstract

Exploring Rearing Water Temperature Conditions for Inducing Body Growth without Water Temperature Stress in Red-Spotted Grouper (Epinephelus akaara)

Kim,

Hur,

Choi

et al. 2023

Ocean Sci. J.

View full text Add to dashboard Cite

Annual changes in ovarian development stages of farmed female red‐spotted grouper, Epinephelus akaara, and inducing sexual maturity using photoperiod manipulation

Cited by 3 publications

References 51 publications

Habitat Enrichment Causes Changes in Fish Behavioural Characteristics: A Case Study of Sparus latus

Habitat Enrichment Causes Changes in Fish Behavioural Characteristics: A Case Study of Sparus latus

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

Exploring Rearing Water Temperature Conditions for Inducing Body Growth without Water Temperature Stress in Red-Spotted Grouper (Epinephelus akaara)

Contact Info

Product

Resources

About