Protected species bycatch in New Zealand fisheries

Versão mais recente publicado por Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node em Feb 12, 2020 Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node

Seabirds, marine mammals, and turtles are caught during commercial fishing operations within the New Zealand Exclusive Economic Zone. In order to monitor the impacts of fishing on these species, New Zealand government observers on fishing vessels record any protected species bycatch incidents that occur. Observer data on protected species captures are maintained by the Ministry for Primary Industries, with identification of captured animals carried out by the Department of Conservation. The data have been summarised in a series of reports, with the most recent report covering the period from 2002–03 to the end of the 2008–09 fishing year (Abraham and Thompson 2011b).

This dataset provides a summary of protected species bycatch in trawl and longline fisheries, from the 2002–03 to 2012–13 fishing year (fishing years run from October 1 to September 30).

Observers are only present on some fishing vessels. To estimate total captures in a fishery, it is necessary to use statistical methods to extrapolate from the observed fishing to the unobserved fishing. The total observable captures are an estimate of the captures that would have been reported, had observers been present on all fishing vessels. There may be additional mortalities (such as birds that are struck by fishing gear but not brought on board the vessel) that are not recorded by observers. These are referred to as ‘cryptic mortalities’ and are not included in the estimates of total captures, nor is there any evaluation of potential survival of seabirds recorded as captured but subsequently released alive. The methods used for the estimation follow those described in technical reports on bycatch estimation for seabirds (Abraham and Thompson 2011a, Abraham et al. 2013), and marine mammals (Thompson et al. 2013).

####Notes about some Fields: - **fishing_year** the fishing year of the capture. Fishing years run from 1 October to 30 September; - **datetime** the date and time of the capture. All times are in New Zealand Standard Time (GMT+12); - **status** whether the animal was alive or dead; - **identification** how the identification was made (necropsy: by necropsy of the dead animal; photograph: from an expert inspection of a photograph of the capture; imputation: imputed by correcting the observer code using necropsy and photographic identifications of other captures with the same observer identification; as reported by the observer); - **method** the fishing method (surface longline; bottom longline; trawl; set net; or purse seine); - **target** the target species reported by the fisher; - **vessel_size** the length class of the vessel (a range in m).

Registros de Dados

Os dados deste recurso de ocorrência foram publicados como um Darwin Core Archive (DwC-A), que é o formato padronizado para compartilhamento de dados de biodiversidade como um conjunto de uma ou mais tabelas de dados. A tabela de dados do núcleo contém 10,307 registros.

Este IPT armazena os dados e, portanto, serve como um repositório de dados. Os dados e os metadados do recurso estão disponíveis para download no seção de downloads. A tabela de versões lista outras versões do recurso que foram disponibilizadas ao público e permite o rastreamento das alterações realizadas no recurso ao longo do tempo.

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Versões

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Como citar

Pesquisadores deveriam citar esta obra da seguinte maneira:

Abraham E R, Thompson F N (2016): Protected species bycatch in New Zealand fisheries. v1.6. Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. Dataset/Occurrence. https://nzobisipt.niwa.co.nz/resource?r=protected_species_bycatch_nz&v=1.6

Direitos

Pesquisadores devem respeitar a seguinte declaração de direitos:

O editor e o detentor dos direitos deste trabalho é Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. Crown copyright ©. Copyright material on the Protected Species Captures website is protected by copyright owned by the Ministry for Primary Industries on behalf of the Crown. Unless indicated otherwise for specific items or collections of content (either below or within specific items or collections), this copyright material is licensed for re-use under a Creative Commons Attribution (CC-BY) 4.0 License. In essence, you are free to copy, distribute and adapt the material, as long as you attribute it to Ministry for Primary Industries and abide by the other licence terms.

GBIF Registration

Este recurso foi registrado no GBIF e atribuído ao seguinte GBIF UUID: f55751e3-ac05-4f11-b70f-7b81cb397452.  Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node publica este recurso, e está registrado no GBIF como um publicador de dados aprovado por Ocean Biogeographic Information System.

Palavras-chave

Occurrence; Observation

Contatos

Quem criou esse recurso:

E. R. Abraham
CEO
Dragonfly Data Science PO Box 27535 6141 Wellington New Zealand NZ
http://www.dragonfly.co.nz/
F. N. Thompson
co-author
Dragonfly Data Science PO Box 27535 6141 Wellington NZ
http://www.dragonfly.co.nz/

Quem pode responder a perguntas sobre o recurso:

Edward Abraham
CEO
Dragonfly Data Science PO Box 27535 6141 Wellington New Zealand NZ
http://www.dragonfly.co.nz/

Quem preencher os metadados:

Edward Abraham
CEO
Dragonfly Data Science PO Box 27535 6141 Wellington New Zealand NZ
http://www.dragonfly.co.nz/

Quem mais foi associado com o recurso:

Usuário
Kevin Mackay

Cobertura Geográfica

New Zealand Exclusive Economic Zone

Coordenadas delimitadoras Sul Oeste [-57, -165], Norte Leste [-24, 157]

Cobertura Temporal

Data Inicial / Data final 2002-10-01 / 2016-09-30

Citações bibliográficas

  1. Abraham E. R., Thompson F. N. (2014). Captures of turtles in trawl fisheries, in the New Zealand Exclusive Economic Zone, from 2002–03 to 2012–18. https://data.dragonfly.co.nz/psc/v20140201/turtles/trawl/all-vessels/eez/all/
  2. Abraham E. R., Thompson F. N. (2014). Captures of all birds in trawl fisheries, in the New Zealand Exclusive Economic Zone, from 2002–03 to 2012–18. https://data.dragonfly.co.nz/psc/v20140201/birds/trawl/all-vessels/eez/all/
  3. Abraham E. R., Thompson F. N. (2014). Captures of whales and dolphins in trawl fisheries, in the New Zealand Exclusive Economic Zone, from 2002–03 to 2012–18. https://data.dragonfly.co.nz/psc/v20140201/whales-and-dolphins/trawl/all-vessels/eez/all/
  4. Abraham E. R., Thompson F. N. (2014). Captures of New Zealand sea lion in trawl fisheries, in the New Zealand Exclusive Economic Zone, from 2002–03 to 2012–18. https://data.dragonfly.co.nz/psc/v20140201/new-zealand-sea-lion/trawl/all-vessels/eez/all/
  5. Abraham E. R., Thompson F. N. (2014). Captures of New Zealand fur seal in trawl fisheries, in the New Zealand Exclusive Economic Zone, from 2002–03 to 2012–18. https://data.dragonfly.co.nz/psc/v20140201/new-zealand-fur-seal/trawl/all-vessels/eez/all/
  6. Abraham E. R., Thompson F. N. (2014). Captures of other seals in trawl fisheries, in the New Zealand Exclusive Economic Zone, from 2002–03 to 2012–18. https://data.dragonfly.co.nz/psc/v20140201/other-seals/trawl/all-vessels/eez/all/

Metadados Adicionais

marine, harvested by iOBIS

Identificadores alternativos f55751e3-ac05-4f11-b70f-7b81cb397452
https://nzobisipt.niwa.co.nz/resource?r=protected_species_bycatch_nz