00623nam a2200205Ia 4500003000600000005001700006008004100023020001800064040002500082082001700107100002100124245006100145260003200206300002700238500005600265650002400321650002400345650002600369650002200395NORSU20240429000744.0240215s9999    xx            000 0 und d  a0-300-02349-9  aNORSU-DumcNORSU-Dum  a591.52632 Z1  aZaret, Thomas M. 0aPredation and Freshwater CommunitiescBy Thomas M. Zaret  bYale University Pressc1980  axiv, 183 pages, 21 cm.  aincludes appendix, bibliographic references & index  aFreshwater ecology.  aPredation (Biology)  aCompetition (Biology)  aNatural selection