Ulteriori informazioni
All those who think that bivalves are boring are in the best company. Karl von Frisch is reported to have turned the pages more quickly in texts where bivalves were treated because, according to him, they literally lack any behaviour. The fact that they can filtrate huge amounts of water, burrow into the sedi ment, actively swim, drill holes into rocks and boats or detect shadows with the aid of pretty blue eyes located on the rim of their mantle obviously left v. Frisch unimpressed. Why, then, a book on the large freshwater mussels (Naiads or Unionoida), which on first sight are much less spectacular than the marine ones? The main reason is that they are keepers of secrets which they reveal only on close and careful inspection. This is not only true for the pearls some species produce and which over centuries have contributed to the treasures of bishops and kings, but particularly for their ecology: their life cycles are linked with those of fishes, some can occur in incredible densities and some can live for more than 100 years. Thus, the presence or absence of naiads in a lake or stream has manifold implications.
Sommario
This volume comprises 22 chapters and is divided into the following sections:
Systematics and Distribution;
Life History Strategies;
Populations and Communities; Evolutionary Biology;
Mussels and Environment;
Synopsis.
Riassunto
All those who think that bivalves are boring are in the best company. Karl von Frisch is reported to have turned the pages more quickly in texts where bivalves were treated because, according to him, they literally lack any behaviour. The fact that they can filtrate huge amounts of water, burrow into the sedi ment, actively swim, drill holes into rocks and boats or detect shadows with the aid of pretty blue eyes located on the rim of their mantle obviously left v. Frisch unimpressed. Why, then, a book on the large freshwater mussels (Naiads or Unionoida), which on first sight are much less spectacular than the marine ones? The main reason is that they are keepers of secrets which they reveal only on close and careful inspection. This is not only true for the pearls some species produce and which over centuries have contributed to the treasures of bishops and kings, but particularly for their ecology: their life cycles are linked with those of fishes, some can occur in incredible densities and some can live for more than 100 years. Thus, the presence or absence of naiads in a lake or stream has manifold implications.
Testo aggiuntivo
From the reviews "... Hier wird eine aktuelle Synopse des Wissens über die Biologie der großen Süßwassermuscheln = Najaden verfügbar gemacht, wie sie in dieser Vollständigkeit bislang nicht bekannt war. Dafür ist den Autoren zu danken. Der Band sollte in keiner wissenschaftlichen Bibliothek fehlen, ebenso nicht in der von Najadenforschern und Malakozoologen sowie der Nautrschutzverwaltung." (Mainzer Naturwissenschaftliches Archiv Vol. 39, 2001)
Relazione
From the reviews "... Hier wird eine aktuelle Synopse des Wissens über die Biologie der großen Süßwassermuscheln = Najaden verfügbar gemacht, wie sie in dieser Vollständigkeit bislang nicht bekannt war. Dafür ist den Autoren zu danken. Der Band sollte in keiner wissenschaftlichen Bibliothek fehlen, ebenso nicht in der von Najadenforschern und Malakozoologen sowie der Nautrschutzverwaltung." (Mainzer Naturwissenschaftliches Archiv Vol. 39, 2001)
