Is Sexual Size Dimorphism Inherent in the Scallop Patinopecten yessoensis?

Table 1

Patinopecten yessoensis. Wet weight and size parameters of the same aged males and females from the population inhabiting Melkovodnaya Bay. indicates significant differences between parameters at a level (-test). — indicates that data were not compared. Bold marks higher values. is sample size.

Parameters, g	Males	Females
3-year-olds
Total weight	161.9 ± 10.0	159.2 ± 7.7	0.3652
Adductor muscle weight	20.2 ± 1.9	18.4 ± 2.1	0.2650
Shell weight	72.1 ± 5.6	70.8 ± 5.6	0.2542
Remains of soft tissues without gonads	22.1 ± 2.1	18.6 ± 3.0	0.0821
Shell height	106.6 ± 3.1	104.0 ± 3.8	0.2864
Shell length	110.0 ± 4.3	107.8 ± 4.1	0.3246
Shell width	27.5 ± 0.6	25.6 ± 1.2	0.0620
4-year-olds
Total weight	294.7 ± 8.5	285.8 ± 10.5	0.3548
Adductor muscle weight	40.4 ± 1.6	37.7 ± 3.0	0.3673
Shell weight	129.0 ± 5.2	119.8 ± 5.6	0.0734
Remains of soft tissues without gonads	32.5 ± 2.0	30.3 ± 2.3	0.1035
Shell height	123.7 ± 2.9	122.1 ± 3.2	0.4891
Shell length	129.9 ± 3.4	128.5 ± 4.0	0.3468
Shell width	32.5 ± 0.9	31.3 ± 1.1	0.0773
5-year-olds
Total weight	404.8 ± 19.0	402.7 ± 20.2	0.5331
Adductor muscle weight		50.9 ± 3.1	0.0425
Shell weight	199.7 ± 11.3	188.0 ± 11.2	0.1483
Remains of soft tissues without gonads	52.2 ± 2.4	51.7 ± 2.9	0.2115
Shell height	138.2 ± 1.7	137.8 ± 2.7	0.5857
Shell length	146.8 ± 2.1	146.0 ± 2.9	0.7625
Shell width	38.5 ± 0.8	38.0 ± 1.4	0.0598
6-year-olds
Total weight		445.3 ± 13.5	0.0353
Adductor muscle weight	72.0 ± 4.4	65.3 ± 3.1	0.0621
Shell weight		213.8 ± 8.4	0.0432
Remains of soft tissues without gonads	65.9 ± 6.1	62.4 ± 5.5	0.0958
Shell height	146.4 ± 4.8	147.0 ± 4.8	0.5697
Shell length	159.3 ± 5.5	160.5 ± 4.9	0.4627
Shell width	41.3 ± 0.9	42.0 ± 0.9	0.1068
7-year-olds
Total weight	527.3 ± 20.1	489.1 ± 14.5	—
Adductor muscle weight	72.4 ± 4.1	70.1 ± 3.4	—
Shell weight	264.4 ± 10.6	237.6 ± 9.5	—
Remains of soft tissues without gonads	70.7 ± 2.8	67.4 ± 2.8	—
Shell height	147.5 ± 4.0	146.7 ± 4.7	—
Shell length	162.5 ± 7.7	161.7 ± 5.2	—
Shell width	43.8 ± 1.5	43.2 ± 1.9	—
8-year-olds
Total weight		551.2 ± 11.7	0.0413
Adductor muscle weight	75.1 ± 3.9	74.0 ± 3.6	0.3422
Shell weight		271.3 ± 10.1	0.0480
Remains of soft tissues without gonads	63.7 ± 2.0	65.3 ± 1.2	0.1653
Shell height	148.9 ± 4.3	150.4 ± 2.6	0.4897
Shell length	160.0 ± 5.1	163.4 ± 5.0	0.3685
Shell width	44.8 ± 1.6	44.2 ± 0.4	0.3597