caa a22 4500 469098007 CHVBK 20180323133036.0 cr unu---uuuuu 170328e19920801xx s 000 0 eng 10.1007/BF00317778 doi (NATIONALLICENCE)springer-10.1007/BF00317778 Hill Cathy Department of Zoology, Stockholm University, S-106 91, Stockholm, Sweden aut Interactions between year classes in the benthic amphipod Monoporeia affinis [Elektronische Daten] effects on juvenile survival and growth [Cathy Hill] Summary: The effect of 1-year-old Monoporeia (=Pontoporeia) affinis on the survival and growth of young of the year was studied in laboratory experiments. Amphipods were kept in jars with sediment and a continuous supply of cooled water for 3 months. Adults or juveniles were added to a control density of juveniles. Juvenile mortality increased at higher total densities, and was greater when adults were present. The mean length and dry weight of juveniles decreased at higher densities, but adults did not have a greater effect than juveniles. These density-dependent effects are probably caused by competition for food within and between year classes. Thus, a high abundance of juveniles or adults could reduce the recruitment of juveniles into the adult year-class the following year, and the suppression of juvenile growth could lower fecundity. The results of this experiment support the hypothesis, inferred from field data from the Baltic Sea and Swedish lakes, that intraspecific interactions contribute to fluctuations in the abundance of populations of M. affinis. Springer-Verlag, 1992 Density dependence nationallicence Intraspecific competition nationallicence Laboratory experiments nationallicence Monoporeia (=Pontoporeia) nationallicence Population fluctuations nationallicence Oecologia Springer-Verlag 91/2(1992-08-01), 157-162 0029-8549 91:2<157 1992 91 442 https://doi.org/10.1007/BF00317778 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00317778 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Hill Cathy Department of Zoology, Stockholm University, S-106 91, Stockholm, Sweden aut NATIONALLICENCE 773 0- Oecologia Springer-Verlag 91/2(1992-08-01), 157-162 0029-8549 91:2<157 1992 91 442 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer