Studies On the Reproduction And Artificial Propagation of Fresh-Water Mussels
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In our eReader you can find the full English version of the book. Read Studies On the Reproduction And Artificial Propagation of Fresh-Water Mussels Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Studies On the Reproduction And Artificial Propagation of Fresh-Water Mussels
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To quickly assess the difficulty of the text, read a short excerpt:
47, pi. xii, of Syinphynota coslata).
The conclusion is inevitable that we have here to do with a species which has no parasitism in its life history, although the presence of hooks and other typical glochidial structures would indicate that it has originated from ancestors which possessed the para- sitic stage like other fresh-water mussels. The cord is undoubtedly to be interpreted as a nutritive adaptation which arises in the marsupium during the early stages of gravidity, since the young em...bryos are at first contained in an unformed viscid matrix and the cords are a later product.
The whole history of this exceptional species warrants a more detailed study, and Miss Young is now engaged in such an investigation. When her work is completed we hope that it may include the entire course of development, the method of formation of the cords, and the rearing of the young mussels during a much longer period than has thus far been possible.
V. ATTEMPT TO REAR GLOCHIDIA IN CULTURE MEDIA.
Since the relation of the glochidium to the fish is essentially a nutritive one, it seemed to us that it should be possible to rear the larvae through the metamorphosis artificially, provided a suitable nutritive medium could be found, and accordingly a series of experiments, with this object in view, were undertaken at our suggestion by one of our students, Mr.
What to read after Studies On the Reproduction And Artificial Propagation of Fresh-Water Mussels?
You can find similar books in the "Read Also" column, or choose other free books by George Lefevre to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
47, pi. xii, of Syinphynota coslata).
The conclusion is inevitable that we have here to do with a species which has no parasitism in its life history, although the presence of hooks and other typical glochidial structures would indicate that it has originated from ancestors which possessed the para- sitic stage like other fresh-water mussels. The cord is undoubtedly to be interpreted as a nutritive adaptation which arises in the marsupium during the early stages of gravidity, since the young em...bryos are at first contained in an unformed viscid matrix and the cords are a later product.
The whole history of this exceptional species warrants a more detailed study, and Miss Young is now engaged in such an investigation. When her work is completed we hope that it may include the entire course of development, the method of formation of the cords, and the rearing of the young mussels during a much longer period than has thus far been possible.
V. ATTEMPT TO REAR GLOCHIDIA IN CULTURE MEDIA.
Since the relation of the glochidium to the fish is essentially a nutritive one, it seemed to us that it should be possible to rear the larvae through the metamorphosis artificially, provided a suitable nutritive medium could be found, and accordingly a series of experiments, with this object in view, were undertaken at our suggestion by one of our students, Mr.
What to read after Studies On the Reproduction And Artificial Propagation of Fresh-Water Mussels?
You can find similar books in the "Read Also" column, or choose other free books by George Lefevre to read onlineMoreLess
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