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| Summary | Australian Sea Lion (Neophoca cinerea) is an endemic species that feeds on benthic dwelling fish, cephalopods, crustaceans and sharks - and as a higher trophic level predator is used in this case as a proxy for ecosystem health. | |
|---|---|---|
| Project | SESMAD | |
| Subtype | Natural Resource Unit | |
| Sector | Marine protected areas | |
| Biotic | Yes | |
| Explanation | ||
| Commons Aggregation | Population | |
| Explanation | ||
| Commons Boundaries | ||
| Explanation | Australian endemic species restricted to South and Western Australia. It has known breeding grounds, and foraging grounds are though to extend across a large proportion of the shelf adjacent to south Australia. | |
| Commons Indicator | ["Ecosystem health and/or biodiversity"] | |
| Explanation | A higher trophic level species found to eat benthic dwelling fish, cephalopods, crustaceans and sharks (McIntosh et al. 2006). | |
| Commons Unit Size | Medium (3) | |
| Explanation | Males can become very large, 185–225 cm in length and weighing 180–250 kg. Females are smaller, 130–185 cm at in length and weighing 65–100 kg. | |
| Environmental Medium | Oceanic | |
| Explanation | ||
| Inter Annual Predictability | Moderate (2) | |
| Explanation | Supra-annual breeding cycle of 17-18 months = pupping seasons do not occur at the same time each year, making predictions difficult (Shaughnessy et al. 2011) | |
| Intra Annual Predictability | Moderate (2) | |
| Explanation | Duration of pupping season varies between colonies (from 5 - 8 months) - complicate assessing abundance (Shaughnessy et al. 2011) | |
| Commons Renewability | Renewable (1) | |
| Explanation | ||
| Productivity | Poorly productive (1) | |
| Explanation | Lower level of fecundity when compared to annually breeding pinnipeds, such as the conspecific NZ fur seal | |
| Commons Accessibility | Very accessible (3) | |
| Explanation | Known haul out and breeding sites on land, and also often in near shore areas where fishing and recreational activities take place | |
| Commons Heterogeneity | Moderate (2) | |
| Explanation | ||
| Commons Mobility | Medium (2) | |
| Explanation | ||
| Commons Spatial Extent | ||
| Explanation | ||
| Technical Substitute | No | |
| Explanation | ||