Validation of annulus formation in white perch otoliths, including characteristics of an invasive population

Figures & data

Table 1. Distribution of white perch ages collected monthly from Sooner Lake, Oklahoma during 2015–2016.

	Age (years)
Month	0	1	2	3	4	5	6	7	8	Monthly total
January	8	21	1	2	2	2	5	2		43
February	17	26	3	1		1	1			49
March	14	38	2	4		11	6	5		80
April		24	7		4	10	10	2	3	60
June		13	1	1		8	2	1		26
July	9	3	1	5	1	5	4	3		31
August	7	10	2	3	4	14	5	5		50
September	10	7	1	1	2	8	4	2		35
October	13	20	2	2	1	17	4	6		65
November	16	33	1	2	3	6	5	2		68
December	16	24	2	4		14	2	2		64
Total	110	219	23	25	17	96	48	30	3	571

Figure 1. Mean marginal increment measurement by month from white perch otoliths for (A) age 1, (B) ages 2–3, (C) ages 4–5, (D) ages 6–8, and (E) pooled ages. Error bars represent the standard error of the mean.

Figure 2. Length-frequency distribution (by 10 mm TL increments) of white perch collected from Sooner Lake, Oklahoma during 2015–2016.

Table 2. Proportional size distribution (PSD) and mean relative weight (W_r; standard deviation) by length categories, and length–weight relationship for white perch collected from Sooner Lake, Oklahoma during 2015–2016.

Category	TL (mm)	N	Mean Wr	PSD
Sub-stock	<130	154	85 (19)	–
Stock	130–199	166	84 (11)	–
Quality	200–249	168	93 (9)	60
Preferred	250–299	79	92 (9)	32
Memorable	300–379	3	84 (7)	1
Trophy	>380	0	–	–
Length–weight relationship		log10(W) = −5.3614 + 3.216 log10(L)

Figure 3. Von Bertalanffy growth curve calculated from otolith age estimates for white perch collected from Sooner Lake, Oklahoma during 2015–2016.

Figure 4. Catch-curve regression and total annual mortality (A) for white perch collected from Sooner Lake, Oklahoma during 2015–2016.