Descripción
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.
Registros
Los datos en este recurso de evento de muestreo han sido publicados como Archivo Darwin Core(DwC-A), el cual es un formato estándar para compartir datos de biodiversidad como un conjunto de una o más tablas de datos. La tabla de datos del core contiene 122 registros.
también existen 1 tablas de datos de extensiones. Un registro en una extensión provee información adicional sobre un registro en el core. El número de registros en cada tabla de datos de la extensión se ilustra a continuación.
Este IPT archiva los datos y, por lo tanto, sirve como repositorio de datos. Los datos y los metadatos del recurso están disponibles para su descarga en la sección descargas. La tabla versiones enumera otras versiones del recurso que se han puesto a disposición del público y permite seguir los cambios realizados en el recurso a lo largo del tiempo.
Versiones
La siguiente tabla muestra sólo las versiones publicadas del recurso que son de acceso público.
¿Cómo referenciar?
Los usuarios deben citar este trabajo de la siguiente manera:
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
Derechos
Los usuarios deben respetar los siguientes derechos de uso:
El publicador y propietario de los derechos de este trabajo es Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. En la medida de lo posible según la ley, el publicador ha renunciado a todos los derechos sobre estos datos y los ha dedicado al Dominio público (CC0 1.0). Los usuarios pueden copiar, modificar, distribuir y utilizar la obra, incluso con fines comerciales, sin restricciones.
Registro GBIF
Este recurso ha sido registrado en GBIF con el siguiente UUID: 5dda8525-57e5-4f42-9c61-730a7902c63f. Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node publica este recurso y está registrado en GBIF como un publicador de datos avalado por Ocean Biodiversity Information System.
Palabras clave
Samplingevent; Observation
Contactos
- Originador
- Inspector of Fisheries
- Proveedor De Los Metadatos ●
- Punto De Contacto
Cobertura geográfica
Coastal waters of New Zealand
| Coordenadas límite | Latitud Mínima Longitud Mínima [-39,766, 173,738], Latitud Máxima Longitud Máxima [-35,879, 178,423] |
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Cobertura temporal
| Fecha Inicial / Fecha Final | 1901-02-09 / 1901-05-20 |
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Referencias bibliográficas
- AYSON, L. F. 1901: Report on experimental trawling (1901, New Zealand). Government Printer, Wellington. 1901. 17 pp
Metadatos adicionales
marine, harvested by iOBIS
| Propósito | 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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| Identificadores alternativos | 9fe33bf1-7c71-441d-b241-765f2d65bef6 |
| https://nzobisipt.niwa.co.nz/resource?r=nz_experimental_trawl_1901 |