Описание
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 2019–20 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).
Записи данных
Данные этого occurrence ресурса были опубликованы в виде Darwin Core Archive (DwC-A), который является стандартным форматом для обмена данными о биоразнообразии в виде набора из одной или нескольких таблиц. Основная таблица данных содержит 12 078 записей.
Данный экземпляр IPT архивирует данные и таким образом служит хранилищем данных. Данные и метаданные ресурсов доступны для скачивания в разделе Загрузки. В таблице версий перечислены другие версии ресурса, которые были доступны публично, что позволяет отслеживать изменения, внесенные в ресурс с течением времени.
Версии
В таблице ниже указаны только опубликованные версии ресурса, которые доступны для свободного скачивания.
Как оформить ссылку
Исследователи должны дать ссылку на эту работу следующим образом:
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
Права
Исследователи должны соблюдать следующие права:
Публикующей организацией и владельцем прав на данную работу является Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.
Регистрация в GBIF
Этот ресурс был зарегистрирован в GBIF, ему был присвоен следующий UUID: 2cd1e1df-4881-404e-8303-31d42e304fb4. Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node отвечает за публикацию этого ресурса, и зарегистрирован в GBIF как издатель данных при оподдержке Ocean Biodiversity Information System.
Ключевые слова
Occurrence; Occurrence
Контакты
- Originator
- Originator
- Metadata Provider ●
- Point Of Contact
Географический охват
New Zealand Exclusive Economic Zone
| Ограничивающие координаты | Юг Запад [-57, -165], Север Восток [-24, 157] |
|---|
Временной охват
| Дата начала / Дата окончания | 2002-10-01 / 2020-09-30 |
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Библиографические ссылки
- 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/
- 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/
- 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/
- 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/
- 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/
- 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/
Дополнительные метаданные
marine, harvested by iOBIS
| Альтернативные идентификаторы | f55751e3-ac05-4f11-b70f-7b81cb397452 |
|---|---|
| https://nzobisipt.niwa.co.nz/resource?r=protected_species_bycatch_nz |