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paperback. Condizione: New. Paperback. Pub Date: 2021-02-01 Pages: 32 Language: English Publisher: Shanghai Foreign Language Education Press A curious little star wants to know what the sun looks like.?When the moon called the stars to go to bed. the little star hid under the clouds and waited quietly.?Gradually. the sun rose. and a colorful world appeared in front of the little star.…

Microcondylaea bonellii is a freshwater mussel with a restricted distribution area that faces a serious decline. Presently, little is known about its biology and ecology. Data on reproduction, growth and habitat of a population living in a stream in northeastern Italy were collected in the years 1990-2003. The species is a short-time breeder with eggs and larvae present in its marsupia from April to June; it is capable of consecutive brooding. It releases infectious larvae in the form of conglutinates, i.e. distinct worm-like objects with glochidia embedded in a fi lamentous matrix. The host fish range is supposedly narrow but direct observations are lacking. The preferred bottom substratum are stable banks of fine to coarse-grained sand, eventually overgrown by higher water plants. The growth pattern of the study population appears to be unchanged for over a century. Identification of host fishes and preservation of favourable substratum conditions are the main factors for the conservation of the species. 9 pp., 6 figs, 4.…