Changes in Sex Steroids, Growth Hormone, and Insulin-Like Growth Factor-I during Ovarian Development in Rainbow Trout Cultured in a Water Recirculating System with Continuous Light

Figures & data

Table 1 Light intensity measured on August 13, 2008, where A–D are different indoor locations, all at arm's length from the edge of the tank wall and 30 cm above the water surface, and outdoor locations were N (north) and S (south) of the building.

	Light intensity (lx)
Time of day	Tank room				Outdoors
(hours)	A	B	C	D	N	S
0510	195	55	38	67	1	1
0635	252	102	73	121	1,265	1,445
1350	1,943	1,577	1,118	1,341	80,000	87,400
1610	1,315	1,100	699	867	67,500	66,000

Figure 1 Rainbow Trout (A) follicle diameter means ± SE (N = 10) as a function of age endpoint. Means with the different letters differ significantly (P ≤ 0.05), and (B) follicle diameters of individual females at three time points, each circle representing a single female.

Figure 2 Ovary of a female Rainbow Trout exhibiting atresia.

Figure 3 Mean ± SE (N = 10) fat and moisture content (%) of viscera of female Rainbow Trout as a function of age endpoint. Means with the different letters (lowercase letters = moisture, uppercase letters = crude fat) differed significantly (P < 0.05).

Figure 4 Mean ± SE (N = 10) plasma concentrations of sex steroids in female Rainbow Trout as a function of age endpoint. Means with the different letters (lowercase letters = E2, uppercase letters = T) differed significantly (P < 0.05).

Figure 5 Mean ± SE (N = 10) plasma concentrations of growth axis hormones in female Rainbow Trout as a function of age endpoint: (A) Plasma GH, and (B) plasma IGF-I. Means with different letters differed significantly (P < 0.05).