Data Zone
The site was identified as important in 2004 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.
Populations meeting IBA criteria ('trigger species') at the site:| Species | Red List1 | Season | Year(s) | Size | IBA criteria |
|---|---|---|---|---|---|
| Eurasian Wigeon Mareca penelope | LC | winter | 2003 | present | A4i |
1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2004) may differ.
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2004. The most recent assessment (2015) is shown below.
| IBA conservation assessment | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2015 | unfavourable | medium | low |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | habitat | - | |
| State (condition of the trigger species' habitats) | |||
|---|---|---|---|
| Habitat | Quantity (% remaining) | Quality (% carrying capacity) | Result |
| Marine Intertidal | good (> 90%) | poor (40-69%) | unfavourable |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Agricultural expansion and intensification | likely in short term (within 4 years) | some of area/population (10-49%) | moderate to rapid deterioration | medium |
| Response (conservation actions taken for the trigger species and/or their habitats) | |||
|---|---|---|---|
| Protected areas | Management plan | Other action | Result |
| Little/none of site covered (<10%) | A comprehensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species | Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity | low |
| Year | Protected Area | Designation | % overlap with IBA |
|---|---|---|---|
| 1985 | Yoshino | Prefectural Wildlife Protection Area | 13 |
| 2004 | Omiko | 都道府県指定鳥獣保護区 | 9 |
| 2005 | Shikoku saburo bashi | 都道府県指定鳥獣保護区 | 3 |
| 2013 | Common fishery right area(Tokushima) | 共同漁業権区域 | 6 |
| Habitat1 | Habitat detail | % of IBA |
|---|---|---|
| Marine Intertidal | major (>10) | |
| Marine Neritic | major (>10) |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Lower Yoshinogawa river (Japan). Downloaded from
https://datazone.birdlife.org/site/factsheet/lower-yoshinogawa-river-iba-japan on 22/11/2024.