FAWN
发表于 2025-3-23 12:03:30
https://doi.org/10.1007/978-3-662-59482-7ed in definite segmental posititions. When mature, a precisely located swollen area of the epidermis called a clitellum secretes a cocoon in which the eggs or ova are deposited. These are usually fertilized and there is development within the egg without a free larval stage, the newly- hatched worms resembling the adults.
铁塔等
发表于 2025-3-23 15:37:13
Morphology,ed in definite segmental posititions. When mature, a precisely located swollen area of the epidermis called a clitellum secretes a cocoon in which the eggs or ova are deposited. These are usually fertilized and there is development within the egg without a free larval stage, the newly- hatched worms resembling the adults.
ARK
发表于 2025-3-23 20:30:07
https://doi.org/10.1007/978-3-642-91481-2quare sampling tool, for estimating populations of earthworms by handsorting. He concluded that sixteen sample units of an area of 1/16 m. taken to a depth of 20 cm gave an adequate estimation of a population of medium-sized species. For larger worms and deeper samples, a larger area of deeper sample was required.
filicide
发表于 2025-3-23 23:13:33
Ecology,quare sampling tool, for estimating populations of earthworms by handsorting. He concluded that sixteen sample units of an area of 1/16 m. taken to a depth of 20 cm gave an adequate estimation of a population of medium-sized species. For larger worms and deeper samples, a larger area of deeper sample was required.
Ige326
发表于 2025-3-24 03:50:16
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Flat-Feet
发表于 2025-3-24 09:22:44
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Nebulizer
发表于 2025-3-24 10:58:04
Physiology,any other aspects of their biology. The reader is referred to a comparatively recent text, ‘The Physiology of Earthworms’ by M. S. Laverack (1963), for a more detailed treatment than is possible in the present work.
虚弱的神经
发表于 2025-3-24 17:41:40
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恃强凌弱的人
发表于 2025-3-24 20:14:53
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Dignant
发表于 2025-3-25 01:25:31
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