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Tunny Investigations made in the North Sea on Col. E. T. Peel's Yacht, “St. George,” Summer, 1933. Part I. Biometric Data

  • F. S. Russell (a1)
Abstract

1. Details are given of the types of hooks lost in tunny in the North Sea in the summer of 1933.

2. Data are given on the measurements made on thirty-two large migrating fish caught in the North Sea in August and September, 1933.

3. In certain body proportions the tunny measured differ from those in the G4 Group (200 to 260 cm. in length) given by Heldt for fish from Tunis and by Frade for fish from Algarve on the south coast of Portugal, while in some characters they resemble the Tunis fish and in others the Algarve fish, but all the North Sea fish were between 232 and 271 cm. in length.

4. It was found that there was a tendency for fish with short second dorsal fins to have short first dorsal, anal, and caudal fins, and for those with long second dorsals to have these other three fins long.

5. Measurements were made to supply data on the condition of the fish.

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References
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1. ConseilInternational pour l'Exploration de la Mer (Comité du Plateau Continental Atlantique) et Commission Internationale pour l'Exploration Scientifique de la Mer Méditerranée. Conférence d'Experts pour l'examen des Méthodes Scientifiques et techniques à appliquer à l'étude des poissons de la famille des Thonidés. Comm. Int. Explor. Sci. Mer Médit. Rapp. Proc. Verb., Vol. VII (U.S.), 1932, pp. 4790; and Cons. Perm. Int. Explor. Mer. Rapp. Proc. Verb. Rapport Atlantique, 1931, pp. 92–103, 1933.
2. Frade F. Données Biométriques pour l'Etude du Thon Rouge de l'Algarve (Côte méridionale du Portugal). Bull. de la Soc. Portugaise des Sc. Naturelles, T. XI, No. 7, pp. 89130, 1931.
3. Heldt H. Le Thon Rouge Thunnus thynnus L. Mise à jour de nos connaissances sur ce sujet. Stat. Océanogr. Salammbô. Bull. No. 7, pp. 124, 1927.
4. Heldt H. Contribution à l'Étude des Races de Thons (Thunnus thynnus L.). Caractères Biométriques du Thon Tunisien et Considérations sur sa Croissance. Stat. Ocean. Salammbô. Annales No. IV, 1927, pp. 154.
5. Le Gall J. Contribution à l'etude de la Biologie du Thon Rouge (Thunnus thynnus L.). Sur la présence de Thons Rouges en Mer du Nord et dans l'Atlantique Nord-Est. Cons. Perm. Int. Explor. Mer. Journ. du Cons., Vol. II, No. 3, pp. 309331, 1927.
6. Le Gall J. Le Thon Rouge (Thunnus thynnus L.) en Mer du Nord et dans l'Atlantique Nord-Est. Cons. Perm. Int. Explor. Mer. Journ. du Cons., Vol. IV, No. 2, pp. 200206, 1929.
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Journal of the Marine Biological Association of the United Kingdom
  • ISSN: 0025-3154
  • EISSN: 1469-7769
  • URL: /core/journals/journal-of-the-marine-biological-association-of-the-united-kingdom
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