說明
The object of the 1901 expedition was to continue the experimental survey of the coasts of New Zealand which was commenced the previous year, with the object of ascertaining what extent of trawling grounds exist in certain localities off the coast of the North Island, and to acquire information on the distribution of food-fishes, and assist the fishing industry by placing the information gained on record for the guidance of those interested. The expedition took place from February to May 1901 and covered the North Island and the northern part of the South Island.
The steam-trawler "Doto" (C. A. Nielsen, captain and trawling-master), which had been used for similar experiments in 1900, was chartered from the Nelson Fishing Company for a period of eight weeks initially, but extended to four months. 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.
Fishing gear carried onboard included: trawl-nets—one manila-twine net, 60 ft. head-line, 45 ft. spread, and 65 ft. length; two cotton nets, 70 ft. head-line, 60 ft. spread, and 85 ft. depth; one pair of spare otter boards; one purse Seine net; one bottom dredge; hooks and lines.
資料紀錄
此資源sampling event的資料已發佈為達爾文核心集檔案（DwC-A），其以一或多組資料表構成分享生物多樣性資料的標準格式。 核心資料表包含 122 筆紀錄。
亦存在 1 筆延伸集的資料表。延伸集中的紀錄補充核心集中紀錄的額外資訊。 每個延伸集資料表中資料筆數顯示如下。
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版本
以下的表格只顯示可公開存取資源的已發布版本。
如何引用
研究者應依照以下指示引用此資源。:
Ayson L F, Mackay K (2025). Experimental trawling off New Zealand, 1901. Version 1.1. Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. Samplingevent dataset. https://nzobisipt.niwa.co.nz/resource?r=nz_experimental_trawl_1901&v=1.1
權利
研究者應尊重以下權利聲明。:
此資料的發布者及權利單位為 Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node。 To the extent possible under law, the publisher has waived all rights to these data and has dedicated them to the Public Domain (CC0 1.0). Users may copy, modify, distribute and use the work, including for commercial purposes, without restriction.
GBIF 註冊
此資源已向GBIF註冊，並指定以下之GBIF UUID: 5dda8525-57e5-4f42-9c61-730a7902c63f。 Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node 發佈此資源，並經由Ocean Biodiversity Information System同意向GBIF註冊成為資料發佈者。
關鍵字
Samplingevent; Observation
聯絡資訊
- 出處
- Inspector of Fisheries
- 元數據提供者 ●
- 連絡人
地理涵蓋範圍
Coastal waters of New Zealand
| 界定座標範圍 | 緯度南界 經度西界 [-39.766, 173.738], 緯度北界 經度東界 [-35.879, 178.423] |
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時間涵蓋範圍
| 起始日期 / 結束日期 | 1901-02-09 / 1901-05-20 |
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引用文獻
- AYSON, L. F. 1901: Report on experimental trawling (1901, New Zealand). Government Printer, Wellington. 1901. 17 pp
額外的詮釋資料
marine, harvested by iOBIS
| 目的 | Summarising the results of the experiments, the results show that there is a wide distribution of fish round the coast, and that they exist in large numbers in certain places. The fact that they are not plentiful upon some first-class trawling-bottom is probably due to their migratory habit, which is influenced by the food-supply, and this in turn being influenced, too, by the state of the weather, tides, and currents so that before anything definite could be arrived at in regard to a permanent fish-supply from trawling; a series of experiments upon the same ground at stated intervals is a necessity. Upon this point Mr. A. Hamilton, of the Otago University, said, in his report on the 1900 expedition, referring to one species only, "In this case, as in many others, it is desirable that returns of the kinds of fish taken on the same grounds should be available for each month in the year." And Alying (1900) stated that, "As the migrations of fish are affected by temperatures, tides, and weather conditions, the extent of the fish-supply in any locality can only be ascertained correctly by having each locality fished at different seasons, so that areas mentioned in this report as showing good trawling-bottom, but with a very poor supply of fish at the time they were prospected, may at another season prove to be prolific fishing-grounds." The desirability of making further experiments is therefore obvious, and the results of those already made are not in this sense discouraging, for out of 122 hauls made at as many different places, gurnard were captured in 104 of them, snapper in ninety (sometimes in very large numbers), dog-fish in sixty three (only one or two at a time), lemon-soles in fifty, flounders in forty, soles in thirty-four, crayfish in eighteen, trevally in fifteen, tarakihi in fourteen, moki in ten, and so on. The experience of 1901 expedition was similar to that of the one conducted in 1900 in one respect—viz., that wherever the coast-line was prospected the best results were obtained in from 5 to 25 fathoms, and there appears to be no exception to this rule, although, of course, fish may be taken in small quantities outside these limits. It will be seen from the appended list of fish taken at the various stations that the most marketable kinds were always the most numerous, and that the variety was quite extensive enough to satisfy ordinary requirements. |
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| 替代的識別碼 | 9fe33bf1-7c71-441d-b241-765f2d65bef6 |
| https://nzobisipt.niwa.co.nz/resource?r=nz_experimental_trawl_1901 |