Measuring species concentration, diversification and dependency in a macro-fishery
| Autor: | Ikerne del Valle, Kepa Astorkiza, Ignacio Díaz-Emparanza |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Statistics and Probability
Economics and Econometrics Income shares 05 social sciences Fish species Time horizon Concentration indices 01 natural sciences 010104 statistics & probability Mathematics (miscellaneous) 0502 economics and business Econometrics Dominance (ecology) Ecosystem 0101 mathematics Macro Social Sciences (miscellaneous) 050205 econometrics Mathematics |
| Zdroj: | Empirical Economics. 52:1689-1713 |
| ISSN: | 1435-8921 0377-7332 |
| Popis: | This paper studies the triad “concentration, diversification and dominance” in an ecosystem $$(\Omega _{t})$$ defined as the macro-fishery comprised by the entire commercial fish species landed in a specific geographical area and time horizon (1986:1–2011:12). This is faced computing alternative monthly concentration indices (CIs) based on the income shares of individual species and, afterwards, analysing the structural features and overall dynamics of the monthly time series related to each of the CIs. Special attention will be paid on categorising not only the long-term cycles, but also the seasonal components found in the series. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink