Publications by authors named "Peng-Wei Tseng"
Since females grow faster in penaeid shrimp, all-female aquaculture was proposed. Environmental conditions in the Pacific white shrimp did not found to affect genetic sex determination (ZZ/ZW system). The androgenic gland (AG)-secreting insulin-like androgenic gland hormone (IAG) is a key controlling factor in crustacean male differentiation.
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- - The study focuses on how the brain-pituitary-testis axis influences male development and hinders female traits in black porgy fish, exploring the unclear feedback between gonadal hormones and brain signals.
- - Experiments included short-term sex steroid treatments and surgical gonadectomy, revealing that male fish showed the highest levels of gths transcripts, while hormone treatments increased pituitary lhb transcripts.
- - Findings suggest that exogenous sex steroids impact gths transcription related to gonadal development, and gonadectomy doesn’t significantly change brain signaling gene expression, indicating a communication link between the testis and brain for male fate management.
Unlike gonochoristic fishes, sex is fixed after gonadal differentiation (primary sex determination), and sex can be altered in adults (secondary sex determination) of hermaphroditic fish species. The secondary sex determination of hermaphroditic fish has focused on the differences between testicular tissue and ovarian tissue during the sex change process. However, comprehensive studies analyzing ovarian tissue or testicular tissue independently have not been performed.
View Article and Find Full Text PDFEstrogen has a pivotal role in early female differentiation and further ovarian development. Aromatase (Cyp19a) is responsible for the conversion of androgens to estrogens in vertebrates. In teleosts, cyp19a1a and it paralog cyp19a1b are mainly expressed in the ovary and hypothalamus, respectively.
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