乌龟的年龄与生长

Age and growth in reeves' turtle Chinemys reebesii Gray

对人工养殖的乌龟Chinemysreebesii群体的年龄与生长进行了研究。在自然温度和人工饲养条件下, 乌龟的生长方程为W=10 194e1 716A (r=0 9819)。乌龟的年龄 (A) 与体重 (W)、背甲长(L1 )、背甲宽 (L2 )、体高 (H)、腹甲长 (L3 )、腹甲宽 (L4 ) 密切相关: L1 =3 506A-0 696 (r=0 9953), L2 =2 182A+0 274 (r=0 9970), H=1 429A+0 097 (r=0 9970), L3 =3 4525A+2 1779(r=0 9959), L4 =1 557A+1 2609 (r=0 9971); 背甲长与体重的回归方程为W=0 3063L12 7626 (r=0 9998), P<0 001; 背甲宽与体重的回归方程为W=0 3439L23 201 (r=0 9999), P<0 001; 体高与体重的回归方程为W=1 6148H3 1172 (r=0 9999), P<0 001; 腹甲长与体重的回归方程为W=0 4934L32 6431 (r= 0 9998), P< 0 001; 腹甲宽与体重的回归方程为W = 2 0671L42 9558 (r=0 9995), P<0 001。背甲长与腹甲长的线性回归方程为L1 = 1 0366L3 +0 3348 (r=0 9999), P<0 001。不同年龄段乌龟的生长速度不同, 其相对增长率较快的是在 0+ ~1+龄和 1+ ~2+龄两个年龄段, 在这期间体重分别增长了 332 76%和 406 47%; 在其绝对增长率中, 体重增长最快的是在 3+ ~4+龄, 增长了 454 08g, 但其背 (腹) 甲长 (宽) 及体高增长较快的却是在 1+ ~2+龄和 3+

Age and growth were investigated in cultured reeves' turtle Chinemys reebesii Gray at natural temperature in Guangdong Province. The results indicated that the turtle had a growth curve of W=10.194e^(1.716A)(r=0.9819). There were significant relationships among age (A), weight (W), carapace length (L_(1)), carapace width (L_(2)), body height (H), plastron length (L_(3)) and plastron width (L_(4)), which were W =10.194e^(1.716A),r=0.9819; L_(1 )= 3.506A-0.696,r=0.9953; L_(2 )= 2.182A+0.274,r=0.9970;H = 1.429A+0.097,r=0.9970; L_(3 )= 3.4525A+2.1779,r=0.9959;L_4= 1.557A+1.2609,r=0.9971; W=0.3063L^(2.7626)_1,r=0.9998, P<0.001;W=0.3439L_2^(3.201),r=0.9999, P<0.001; W=1.6148H^(3.1172),r=0.9999, P<0.001; W = 0.4934L_3^(2.6431),r=0.9998,P<0.001; W= 2.0671L^(2.9558)_4,r=0.9995, P<0.001; L_1= 1.0366L_(3)+0.3348,r=0.9999,P<0.001. The turtle had different growth rates at different ages with high relative growth at 0^(+)-1^(+) and 1^(+)-2^(+) year old, increasing by 76% and 47% in body weight. The turtle had good absolute growth at 3^(+) -4^(+) year old in body weight. There was high instant absolute growth in a carapace, plastron and body height at 1^(+)-2^(+) and 3^(+) -4^(+) year old.