| Title | Predator-prey interactions in the South Georgia marine ecosystem |
| Author | Reid, K. |
| Source | 184p. |
| Publication Date | 2002 |
| Notes | In English. Ph.D. thesis. GeoRef Acc. No: 300794 |
| Index Terms | Atlantic Ocean--South Atlantic; Atlantic Ocean Islands--South Georgia; Southern Ocean; Arthropoda; Atlantic Ocean; Atlantic Ocean Islands; Aves; biomass; Bird Island; Chordata; climate change; Crustacea; ecology; ecosystems; Euphausia superba; food chains; habitat; interspecific relations; Invertebrata; Malacostraca; Mandibulata; models; Otariidae; population dynamics; predation; reproduction; Scotia Sea Islands; South Atlantic; South Georgia; statistical distribution; Tetrapoda; trophic analysis; Vertebrata |
| Abstract | Presents results of multi-year analysis of krill in diet of seabirds and seals at Bird Island, South Georgia from 1980- 2000, and uses length frequency distribution to examine pattern of inter- and intra-annual changes in population structure of krill. Krill in diet of predators was found to be reliable and consistent representation of structure of krill population at scales of 100s of km, enabling construction of conceptual model of krill population processes to predict abundance and structure of krill population in following year and subsequent effects on reproductive performance of krill-dependent predators. Discusses changes in performance of predators and population dynamics of krill which indicate substantial change in marine ecosystem around South Georgia over last 20 years, and evaluates implications for understanding and managing marine resources. |
| Publication Type | monograph |
| Record ID | 88754 |