Predation rates by North Sea cod (Gadus morhua) - Predictions from models on gastric evacuation and bioenergetics
Links
- More information: Publisher Index Page (via DOI)
- Open Access Version: Publisher Index Page
- Download citation as: RIS | Dublin Core
Abstract
We compared four different methods for estimating predation rates by North Sea cod (Gadus morhua). Three estimates, based on gastric evacuation rates, came from an ICES multispecies working group and the fourth from a bioenergetics model. The bioenergetics model was developed from a review of literature on cod physiology. The three gastric evacuation rate models produced very different prey consumption estimates for small (<0.5 kg) and large (>2 kg) fish. For most size and age classes, the bioenergetics model predicted food consumption rates intermediate to those predicted by the gastric evacuation models.
Using the standard ICES model and the average population abundance and age structure for 1974–1989, annual prey consumption by the North Sea cod population (age ≥1) was 840 kilotons. The other two evacuation rate models produced estimates of 1020 and 1640 kilotons, respectively. The bioenergetics model estimate was 1420 kilotons. The major differences between models were due to consumption rate estimates for younger age groups of cod.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Predation rates by North Sea cod (Gadus morhua) - Predictions from models on gastric evacuation and bioenergetics |
| Series title | ICES Journal of Marine Science |
| DOI | 10.1006/jmsc.1996.0010 |
| Volume | 53 |
| Issue | 1 |
| Year Published | 1996 |
| Language | English |
| Publisher | Oxford Academic |
| Contributing office(s) | Upper Midwest Environmental Sciences Center |
| Description | 8 p. |
| First page | 107 |
| Last page | 114 |
| Google Analytic Metrics | Metrics page |