{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:BPTSJ2L4KYJUMKAC67GOGTBG7G","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"686f488fe362aa253a0f82f792f9e512ecd9e8248061607f3e35b3dd2ec15789","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.PE","submitted_at":"2015-02-26T01:55:22Z","title_canon_sha256":"e4ed2af8d0372669c8bd060a844b91b7b5078c5b105626158bb23118cffe9ce1"},"schema_version":"1.0","source":{"id":"1502.07413","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.07413","created_at":"2026-05-18T01:23:32Z"},{"alias_kind":"arxiv_version","alias_value":"1502.07413v3","created_at":"2026-05-18T01:23:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.07413","created_at":"2026-05-18T01:23:32Z"},{"alias_kind":"pith_short_12","alias_value":"BPTSJ2L4KYJU","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"BPTSJ2L4KYJUMKAC","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"BPTSJ2L4","created_at":"2026-05-18T12:29:14Z"}],"graph_snapshots":[{"event_id":"sha256:e8da07bc581f107dd01269ee993ea95e4f3ceca1b7f6728c0d539773a5da111c","target":"graph","created_at":"2026-05-18T01:23:32Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"The implementation of effective protected areas is one of the central goals of modern conservation biology. In the context of fisheries management and marine ecosystem conservation, marine reserves often play a significant role to achieve sustainable fisheries management. Consequently, a substantial number of studies have been conducted to establish broad rules for the creation of MPAs, or to test the effects of MPAs in specific regions. However, there still exist many challenges for implementing MPAs that are effective at meeting their goals. Deducing theoretical conditions guaranteeing that ","authors_text":"Nao Takashina","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.PE","submitted_at":"2015-02-26T01:55:22Z","title":"Simple rules for establishment of effective marine protected areas in an age-structured metapopulation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.07413","kind":"arxiv","version":3},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:c0cc43ec909e4ea440e0e5f39a08c930d4956e636fda7e5677f02381c1783c40","target":"record","created_at":"2026-05-18T01:23:32Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"686f488fe362aa253a0f82f792f9e512ecd9e8248061607f3e35b3dd2ec15789","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.PE","submitted_at":"2015-02-26T01:55:22Z","title_canon_sha256":"e4ed2af8d0372669c8bd060a844b91b7b5078c5b105626158bb23118cffe9ce1"},"schema_version":"1.0","source":{"id":"1502.07413","kind":"arxiv","version":3}},"canonical_sha256":"0be724e97c5613462802f7cce34c26f997ce45241119bf7b18c921be35261f1c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0be724e97c5613462802f7cce34c26f997ce45241119bf7b18c921be35261f1c","first_computed_at":"2026-05-18T01:23:32.260958Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:23:32.260958Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ukNNqDkwKAQFrOrsZtS51n5ltyX/6UQh0zwf94xRIjaaZ4Je8u/hZinWLztziu/i+TCNe6iZinxMMLFWnlMlDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:23:32.261600Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.07413","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c0cc43ec909e4ea440e0e5f39a08c930d4956e636fda7e5677f02381c1783c40","sha256:e8da07bc581f107dd01269ee993ea95e4f3ceca1b7f6728c0d539773a5da111c"],"state_sha256":"6454efe3a27a19b370815f40b9af49f77f09b99919bc81414d1ecdda41b24e5b"}