| Type | Variable | Description |
| Dependent | Cu | Japanese pond smelt (H. nipponensis) catch 1972-2008 Lake Kasumigaura |
| Cv | Japanese pond smelt (H. nipponensis) catch 1972-2008 Lake Kitaura | |
| Cx | Japanese pond smelt (H. nipponensis) catch 1998-2008 Lake Kasumigaura | |
| Cy | Japanese pond smelt (H. nipponensis) catch 1998-2008 Lake Kitaura | |
| Px | Japanese pond smelt (H. nipponensis) CPUE 1998-2008 Lake Kasumigaura | |
| Py | Japanese pond smelt (H. nipponensis) CPUE 1998-2008 Lake Kitaura | |
| Independent | w | Total phosphorus Lake Kasumigaura |
| z | Total phosphorus Lake Kitaura | |
| b | Grasscarp (C. idellus) Lake Kitaura | |
| l | Global mean land and ocean temperature index (LOTI) for the latitude band 24˚N to 90˚N |