| f | { | f | { |
| n | "author": null, | n | "author": "Roeland Bom (Royal Netherlands Institute for Sea |
| "author_email": null, | | Research)", |
| | | "author_email": "roeland.bom@nioz.nl", |
| "code": "7b.b.rd", | | "code": "7b.b.rd", |
| n | "contributor": "NIOZ Royal Netherlands Institute for Sea Research", | n | "contributor": "Royal Netherlands Institute for Sea Research |
| | | (NIOZ)", |
| "creator_user_id": "b2337945-171f-4290-ac80-b7e818b37b1c", | | "creator_user_id": "b2337945-171f-4290-ac80-b7e818b37b1c", |
| "creators": | | "creators": |
| me\":\"Bom\",\"orcid\":\"0000-0001-8180-1958\",\"affiliation\":\"Royal | | me\":\"Bom\",\"orcid\":\"0000-0001-8180-1958\",\"affiliation\":\"Royal |
| Netherlands Institute for Sea | | Netherlands Institute for Sea |
| ndingauthor\":true,\"contactemailaddress\":\"roeland.bom@nioz.nl\"}]", | | ndingauthor\":true,\"contactemailaddress\":\"roeland.bom@nioz.nl\"}]", |
| n | "dataset_persistent_id": "DOI:10.33591/nioz/7b.b.rd", | n | "dataset_persistent_id": "DOI:10.25850/nioz/7b.b.rd", |
| "dates": "[{\"datefrom\":\"1902-01-01 | | "dates": "[{\"datefrom\":\"1902-01-01 |
| 00:00:00.000\",\"dateto\":\"2021-12-31 | | 00:00:00.000\",\"dateto\":\"2021-12-31 |
| 00:00:00.000\",\"type\":\"collected\",\"information\":null}]", | | 00:00:00.000\",\"type\":\"collected\",\"information\":null}]", |
| "deposit_date": "2022-10-24", | | "deposit_date": "2022-10-24", |
| n | "depositor": "Roeland Bom", | n | "depositor": "Roeland Bom (roeland.bom@nioz.nl)", |
| "distribution_date": "2022-10-24", | | "distribution_date": "2022-10-24", |
| "distributor": "Research Data Management(NIOZ Royal Netherlands | | "distributor": "Research Data Management(NIOZ Royal Netherlands |
| Institute for Sea Research)", | | Institute for Sea Research)", |
| n | "doi_date_published": "2022-10-24", | n | "doi_date_published": "2022-10-24T11:03:00", |
| "geographic_coverage": "[{\"place\":\"North | | "geographic_coverage": "[{\"place\":\"North |
| longitude_1\":\"51.5\",\"longitude_2\":\"-4\",\"latitude_1\":\"8\"}]", | | longitude_1\":\"51.5\",\"longitude_2\":\"-4\",\"latitude_1\":\"8\"}]", |
| "groups": [], | | "groups": [], |
| "id": "16251a2e-09d1-4715-90cc-1c641a051072", | | "id": "16251a2e-09d1-4715-90cc-1c641a051072", |
| "isopen": false, | | "isopen": false, |
| "license_title": null, | | "license_title": null, |
| n | "maintainer": null, | n | "maintainer": "Roeland", |
| "maintainer_email": null, | | "maintainer_email": "roeland.bom@nioz.nl", |
| "metadata_created": "2024-10-22T11:48:26.811167", | | "metadata_created": "2024-10-22T11:48:26.811167", |
| n | "metadata_modified": "2024-10-22T11:48:26.811174", | n | "metadata_modified": "2024-11-08T16:40:13.352191", |
| "name": "7bbrd", | | "name": |
| | | recent-changes-in-abundance-of-common-skate-complex-in-the-north-sea", |
| "notes": "Following decades of declines, populations of large fish | | "notes": "Following decades of declines, populations of large fish |
| recently started to increase in the North Sea, presumably due to | | recently started to increase in the North Sea, presumably due to |
| reduced fishing pressure. However, population recovery may be too | | reduced fishing pressure. However, population recovery may be too |
| readily claimed, since standardised sampling of fish stocks commenced | | readily claimed, since standardised sampling of fish stocks commenced |
| only in the 1970s, well after many species had already collapsed. A | | only in the 1970s, well after many species had already collapsed. A |
| true recovery must be seen from a long-term perspective. The | | true recovery must be seen from a long-term perspective. The |
| critically endangered common skate (Dipturus batis, Rajidae) | | critically endangered common skate (Dipturus batis, Rajidae) |
| species-complex is an example of a large-bodied fish that mostly | | species-complex is an example of a large-bodied fish that mostly |
| disappeared before standardised monitoring took place. Here we put the | | disappeared before standardised monitoring took place. Here we put the |
| recent increase in population size into a 120-year perspective, | | recent increase in population size into a 120-year perspective, |
| throughout three geographical divisions in the North Sea. We analysed | | throughout three geographical divisions in the North Sea. We analysed |
| a large range of mostly undisclosed historical data and contemporary | | a large range of mostly undisclosed historical data and contemporary |
| sources. A reconstruction of Dutch commercial landings data confirms | | sources. A reconstruction of Dutch commercial landings data confirms |
| that the species used to be very abundant between 1902 \u2013 1920, | | that the species used to be very abundant between 1902 \u2013 1920, |
| and shows how it steadily declined from 1920 onwards until it got | | and shows how it steadily declined from 1920 onwards until it got |
| extirpated around 1970. Based on a quantitative analysis of | | extirpated around 1970. Based on a quantitative analysis of |
| standardized catch numbers from fishery-independent surveys time we | | standardized catch numbers from fishery-independent surveys time we |
| conclude that the current abundance of the species is still below | | conclude that the current abundance of the species is still below |
| historical baselines and represents a local recovery at most. We | | historical baselines and represents a local recovery at most. We |
| further demonstrate a prominent and consistent pattern in | | further demonstrate a prominent and consistent pattern in |
| size-distribution, with larger (mature) individuals only occurring in | | size-distribution, with larger (mature) individuals only occurring in |
| the northern North Sea. A large dataset on historical stomach contents | | the northern North Sea. A large dataset on historical stomach contents |
| from the central North Sea confirmed the diet of young common skate, | | from the central North Sea confirmed the diet of young common skate, |
| which consisted predominantly of shrimps. Our review exemplifies the | | which consisted predominantly of shrimps. Our review exemplifies the |
| importance of marine historical ecology to deduce the natural richness | | importance of marine historical ecology to deduce the natural richness |
| of the North Sea.", | | of the North Sea.", |
| "num_resources": 0, | | "num_resources": 0, |
| "num_tags": 1, | | "num_tags": 1, |
| "organization": { | | "organization": { |
| "approval_status": "approved", | | "approval_status": "approved", |
| "created": "2024-10-22T06:06:56.074257", | | "created": "2024-10-22T06:06:56.074257", |
| "description": "", | | "description": "", |
| "id": "bed2a893-3895-450b-bf4b-c74318003b1b", | | "id": "bed2a893-3895-450b-bf4b-c74318003b1b", |
| "image_url": | | "image_url": |
| z.nl/application/files/1216/8924/5333/NIOZ-logo_witte_randi-2023.svg", | | z.nl/application/files/1216/8924/5333/NIOZ-logo_witte_randi-2023.svg", |
| "is_organization": true, | | "is_organization": true, |
| "name": "nioz", | | "name": "nioz", |
| "state": "active", | | "state": "active", |
| "title": "Royal Netherlands Institute for Sea Research", | | "title": "Royal Netherlands Institute for Sea Research", |
| "type": "organization" | | "type": "organization" |
| }, | | }, |
| "owner_org": "bed2a893-3895-450b-bf4b-c74318003b1b", | | "owner_org": "bed2a893-3895-450b-bf4b-c74318003b1b", |
| "private": false, | | "private": false, |
| n | "production_date": "2022-10-24T11:03:00", | n | "production_date": "2022-10-24", |
| "relationships_as_object": [], | | "relationships_as_object": [], |
| "relationships_as_subject": [], | | "relationships_as_subject": [], |
| "resources": [], | | "resources": [], |
| "state": "active", | | "state": "active", |
| "subject": "Earth and Environmental Sciences", | | "subject": "Earth and Environmental Sciences", |
| "tags": [ | | "tags": [ |
| { | | { |
| "display_name": "Dipturus batis Dipturus intermedius Marine | | "display_name": "Dipturus batis Dipturus intermedius Marine |
| historical ecology Shifting baselines Number per swept a", | | historical ecology Shifting baselines Number per swept a", |
| "id": "cd59ded3-875c-45b4-98de-1c940fa350ea", | | "id": "cd59ded3-875c-45b4-98de-1c940fa350ea", |
| "name": "Dipturus batis Dipturus intermedius Marine historical | | "name": "Dipturus batis Dipturus intermedius Marine historical |
| ecology Shifting baselines Number per swept a", | | ecology Shifting baselines Number per swept a", |
| "state": "active", | | "state": "active", |
| "vocabulary_id": null | | "vocabulary_id": null |
| } | | } |
| ], | | ], |
| "title": "A long-term view on recent changes in abundance of common | | "title": "A long-term view on recent changes in abundance of common |
| skate complex in the North Sea", | | skate complex in the North Sea", |
| "type": "dataset", | | "type": "dataset", |
| t | "url": "https://dataportal.nioz.nl/doi/10.33591/nioz/7b.b.rd", | t | "url": "https://doi.org/10.25850/nioz/7b.b.rd", |
| "version": "1" | | "version": "1" |
| } | | } |