【摘要】 在实验室饲养的条件下 ,研究了正颤蚓在 1 5℃、2 0℃、2 5℃水温的生长发育和繁殖过程。结果表明正颤蚓从其受精卵在蚓茧内发育 ,孵出生长到产卵 ,在 1 5℃水温需 1 0 0— 1 2 3d ,在 2 0℃水温需 70— 90d ,在 2 5℃水温需 48— 64d。蚓自蚓茧内孵出后的 1 65d生长期内 ,其1 5℃、2 0℃、2 5℃水温的体重生长回归方程分别是 :W =6 87/ [1 +1 36 48·exp(- 0 0 61 2·t) ];W =5 99/ [1 +1 1 8 8·exp(- 0 0 91 8·t) ];W =6 82 / [1 +1 35 2 8·exp(- 0 1 389·t) ]。其1 5℃、2 0℃、2 5℃水温的体长生长回归方程分别是 :L =58 3/ [1 +1 3 58·exp(- 0 0 384·t) ];L=51 3/ [1 +1 1 83·exp(- 0 0 566·t) ];L =54 4/ [1 +1 2 6·exp(- 0 0 872·t) ]。其 1 5℃、2 0℃、2 5℃水温的体重与体长关系的回归方程分别是 :W =3 1 0 72·L1 .9486;W =2 92 2 8·L1 .9781 ;W =2 672 5·L1 .9875。更多还原

【Abstract】 The growth and reproduction of Tubifex tubifex have been studied in laboratory cultures at different water temperatures (15℃,20℃,25℃). The life cycle of T. tubifex , takes 100 to 123 days in experimental culture at 15℃,70 to 90 days at 20℃ and 48 to 64 days at 25℃. During the experimental period (165 days as maximum observed), the regression formula describing the growth of weight of animals at 15℃ is :W=6 87/[1+136.48·exp(-0.0612t)],at 20℃: W=5.99/[1+118.8·exp(-0.0918t)] and at 25℃: W=6 82/[1+135.28·exp(-0.1389t)]. The regression formula describing the growth of length of animals at 15℃ is: L=58.3/[1+13.58·exp(-0.0384t)], at 20℃: L=51.3/[1+ 11.83·exp (-0.0566t)] and at 25℃: L=54.4/[1+12.6·exp(-0.0872t)]. The regression formula describing the relationship between weight and length of animals at 15℃ is: W= 3.1072L 1.9486 , at 20℃: W=2.9228L 1.9781 and at 25℃: W=2.6725L 1.9875 . In addition, the relationship between growth of animals and water temperature was discussed.更多还原