Discussion of methods of investigating the food of fishes,with reference to a preliminary study of the prey of Gobiusculus flavescens (Gobiidae) |
| |
Authors: | J Berg |
| |
Institution: | (1) Zoologisches Institut der Universität Hamburg, Hamburg, Germany (FRG);(2) Zoologisches Museum der Universität Hamburg, Hamburg, Germany (FRG) |
| |
Abstract: | The validity, reliability and practicability of different methods for the investigation of stomach contents of a small, plankton-eating fish are discussed. Tests demonstrated the problems related to mass and volume measurements of planktonic food. Several nutrition indices, particularly Hynes's frequency of occurrence are criticized. A logarithmic version of Shorigin's index is proposed as a replacement for Ivlev's food selection index. A preliminary study on the food of Gobiusculus flavescens (Fabricius), sampled in July, 1975 at Helgoland, provides some numerical information on the composition of its stomach contents and food preference. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|