Описание
A trawling expedition undertaken on behalf of the Government during the autumn and early winter months of 1900. The object of the expedition was to make an experimental survey of the coasts of the New Zealand, especially in the neighbourhood of the more thickly populated centres, to ascertain what extent of trawling-grounds existed, what varieties of marketable fish were obtainable in the different localities, to prove whether the conditions necessary for carrying on successful trawling existed in certain localities within workable distance of the best markets; and, if so, to place the information on record for the guidance of those interested in the trawling industry; and generally to acquire information on the distribution of food-fishes, etc., in the sea surrounding these Islands.
To carry out the experimental trawling operations the Government chartered the steam-trawler "Doto" owned by B. A. Petersen and Co., of Napier. The "Doto" was originally built for a steam-yacht, but was subsequently bought by Captain Nielsen, for Messrs. Petersen and Co., in Sydney and taken over to Napier, where she was fitted out and used as a trawler. She is a composite vessel of 28 tons gross register, 66 ft. in length, 12 ft. beam, draught 6 ft. 6 in., and fifteen horse power nominal. The vessel was fitted with the otter-trawl, which while quite as effective can be much more easily and quickly put down and picked up than the beam trawl, and is therefore altogether better suited for the short tows required for experimental work.
Записи данных
Данные этого sampling event 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 154 записей.
Также в наличии 1 таблиц с данными расширений. Записи расширений содержат дополнительную информацию об основной записи. Число записей в каждой таблице данных расширения показано ниже.
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:
Ayson L F, Mackay K (2025). Experimental trawling off New Zealand, 1900. Version 1.1. Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. Samplingevent dataset. https://nzobisipt.niwa.co.nz/resource?r=nz_experimental_trawl_1900&v=1.1
Права
Исследователи должны соблюдать следующие права:
Публикующей организацией и владельцем прав на данную работу является Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. Насколько это возможно по закону, издатель отказался от всех прав на эти данные и посвятил их Public Domain (CC0 1.0). Пользователи могут без ограничений копировать, изменять, распространять и использовать работу, в том числе в коммерческих целях.
Регистрация в GBIF
Этот ресурс был зарегистрирован в GBIF, ему был присвоен следующий UUID: 9fe33bf1-7c71-441d-b241-765f2d65bef6. 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
Samplingevent; Observation
Контакты
- Originator
- Inspector of Fisheries
- Metadata Provider ●
- Point Of Contact
Географический охват
Coastal waters of New Zealand
| Ограничивающие координаты | Юг Запад [-47,186, 167,426], Север Восток [-39,778, 175,177] |
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Временной охват
| Дата начала / Дата окончания | 1900-03-10 / 1900-06-07 |
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Библиографические ссылки
- AYSON, L. F. 1900: Report on experimental trawling (1900, New Zealand). Government Printer, Wellington. 1900. 17 pp.
Дополнительные метаданные
marine, harvested by iOBIS
| Цель | Results obtained at different Localities. In Pegasus Bay and off Banks Peninsula good results were obtained, both with regard to the character of the bottom for trawling and supply of fish. The net was picked up at No. 2 Station off a rocky bottom near Motonau Island; but with that one exception the bottom at all the other trawling-and sounding-stations was either sand, soft sand, or mud; while market fish were plentiful and of good quality. This area being well sheltered and close to Lyttelton Harbour should be a profitable trawling-ground. A ready market for large quantities of fish would be found in Christchurch, the inland towns, and among the shipping at Lyttelton. From Banks Peninsula to the Waitaki River there is a considerable extent of good trawling ground. Shingle banks, however, exist at intervals, extending from close inshore out to 20 fathoms. Beyond the 20-fathom line the bottom, as far as tested, was soft sand, broken shell, and mud. These stony banks are probably formed by the stones and shingle brought down by the four large rivers that flow into the ocean along this range of coast. By reference to the map it will be seen that a large area of sand bottom was found off Timaru, this, although good trawling-bottom at the time it was worked, yielded only a moderate supply of the best market fish; it is probable, however, that at some other season good fish may be plentiful. From the Waitaki River to Moeraki light we found an uneven bottom. Shingle banks exist off the Waitaki and at intervals south to Oamaru, with patches of sand bottom between. These shingle banks extend from the shore out to in places 20 fathoms, beyond that depth the bottom was similar to what we found further north, being soft sand, shell, and mud. To the south of Oamaru reefs exist with a considerable extent of sand bottom between. Even where good bottom was found very few fish were taken in the trawl-net. Uneven bottom was found from Moeraki to abreast of Waikouaiti—soundings taken showed the bottom in places to be sand, but when the net was put down it soon got foul of rooks. In Blueskin Bay .and to the north of the Otago Peninsula an even sand bottom was found with fish fairly plentiful. In Blueskin Bay flat-fish were taken in considerable quantities. Owing to unfavourable weather, both going to and returning from the South, very little work could be done off Taieri Beach and in Molyneux Bay. In Toitoi Bay the gravelly bottom extends well in shore, but a good piece of trawling-bottom was found off the mouth of the Mataura River with fish in considerable quantities. Riverton Bay has a considerable extent of good bottom with flat-fish plentiful. There are, however, patches of gravel, and rocks exist well into the bay. The result of our operation in Tewaewae Bay were eminently satisfactory. Splendid even bottom was found wherever soundings were made or the net was put down, while large quantities of flat-fish were taken at every haul of the net. Soles were particularly plentiful, also a considerable number of flounders and turbot. The survey made of the bays and inlets round Stewart Island shows that the extent of trawling-grounds round the Island is limited. Soundings made showed an uneven bottom, patches of sand with rocks jutting out here and there. In Mason Bay a sand bottom was found, but the net came up at every haul full of weed and with very few fish. Although Cloudy Bay was not, owing to bad weather, as carefully prospected as was intended, the results obtained from what we were able to do were satisfactory. Good bottom was found all over, with fish fairly plentiful. In Tasman and Golden Bays rough bottom was only found at one station (136). A mud bottom was found all over out to the line of sounding- and trawling-stations from D'Urville Island to off Farewell Spit. The best hauls of fish taken during the cruise were made here, while our best market fish were well represented, including flounders, soles, John dory, hake, gurnard, schnapper, moki, tarakihi, and oysters were taken up in the trawl-net in different parts of the bays. The bad weather experienced, and the short time available, owing to the expiration of the charter of the "Doto" prevented Wanganui Bight and the coast south to Kapiti Island from being properly tested. |
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| Альтернативные идентификаторы | 9fe33bf1-7c71-441d-b241-765f2d65bef6 |
| https://nzobisipt.niwa.co.nz/resource?r=nz_experimental_trawl_1900 |