Table 4.
Direct effects of sex steroids demonstrated by in vitro studies using dissociated pituitary cells from teleosts.
| Species | Stages | Synthesis | Secretion | References | |
|---|---|---|---|---|---|
| Lh | Fsh | Lh | |||
| African catfish (Clarias gariepinus) |
mature M | 24 h treatment E2 and T ↓ lhb
48 h treatment: T and E2 ↑ lhb (not DHT) |
(287) | ||
| Atlantic cod (Gadus morhua) |
maturing mix F/M | No effect of T, DHT, or E2 on lhb | T ↑ fshb (not E2 or DHT) | (52) | |
| mature mix F/M | DHT ↑ lhb (not T or E2) | E2 DHT ↑ fshb (not T) | |||
| Post-spawning mix F/M | No effect of T, DHT, or E2 on lhb | T ↓ fshb (not E2 or DHT) | |||
| Black porgy (Acanthopagrus schlegelii) |
mature M | no effects of E2, T, 11-KT on basal levels 11-KT and E2 ↑ Gnrh-induce stimulation |
(69) | ||
| Channel catfish (Ictalurus punctatus) |
mature F | E2 and T ↑ lhb | (266) | ||
| European eel (Anguilla anguilla) |
silver F | T, DHT and 3α-diol ↑ lhb and Lh 24 h treatment: no effect of E2 on lhb or Lh 72 h treatment: E2 ↓ lhb |
T, DHT and 3α-diol ↑ (not E2) | (288) | |
| T ↑ lhb and Lh (not E2) | (289) | ||||
| T and DHT ↑ lhb (not E2) | E2 ↑ fshb (not T or DHT) | (77) | |||
| Goldfish (Carassius auratus) |
mature or sexually regressed | no effect of T on lhb | no effect of T on fshb | (290) | |
| immature | T ↑ lhb | no effect of T on fshb | |||
| Hybrid tilapia (Oreochromis niloticus × O. aureus) |
immature M | No effect of T on lhb | T ↑ fshb | (291) | |
| Marine medaka | mature mix M/F | E2 ↑ lhb | E2 ↑ fshb | (292) | |
| Masu salmon (Oncorhynchus masou) | F and M | E2 and T ↑ lhb (not 11-KT) | E2 and T ↑ (not 11-KT) | (293) | |
| E2 ↑ lhb and Lh | no effect of E2 on fshb or Fsh | (294) | |||
| Nile tilapia (Oreochromis niloticus) |
Maturing F | E2 ↑ lhb | no effect of E2 on fshb | (49) | |
| Rainbow trout (Oncorhynchus mykiss) |
immature | T ↑ Lh | T ↑ | (283) | |
| Adult F | E2 ↑ Gnrh-induce stimulation | (295) | |||
| Immature F | E2 ↑ Gnrh-induce stimulation | (57) | |||
| Ricefield eel (Monopterus albus) |
?? | E2 ↑ lhb | no effect of E2 on fshb | (212) | |
| Zebrafish (Danio rerio) |
mature mix F/M | T and E2 ↑ lhb | T and E2 ↑ fshb | (296) | |