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| Registros recuperados: 233 | |
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| Porumb, Loan I.. |
| Feeding of the S. sprattus was studied comparatively with the dynamics of the zooplanktonic trophic base. In April, the sprat consumed 1,459 t of zooplankton, especially Acartia clausi (84 per cent). Zooplanktonic productivity was 30 per cent due to Acartia clausi, and the sprat consumed 56 per cent of this copepod production. In April, the wt growth of the sprat was 115 t. In May, the sprat consumed 6.201 t of zooplankton, that resulted in a fish production of 492 t. A clausi contributed 36.41 per cent to the zooplankton production and the sprat fed on copepods at a level of 93 per cent. In June, only 1,094 t of zooplankton resulted in a fish production of 87 t. Zooplanktonic production was 60 per cent due to A. clausi, and only 12 per cent of this was... |
| Tipo: Text |
Palavras-chave: Romania; Black Sea; Meroplankton; Copepoda; Zooplankton; Feeding; Sprattus sprattus. |
| Ano: 1973 |
URL: http://archimer.ifremer.fr/doc/1973/publication-2164.pdf |
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| Renzi, M.A.. |
| The "abadejo" is one of the species that has been traditionally exploited in the Argentine Sea. Although the capture was not very important, it has been increased in the last years. In this work, the structure of the concentration areas of summer, spring and winter distribution and other biological items were analyzed, basing on the data collected during cruises effected by R/V "Walther Herwing" and R/V "Shinkai Maru" in these waters during 1978/79. Winter and spring distribution patterns showed the highest concentrations located between 41º and 48º SL, specially on the slope. Summer distribution pattern showed the concentration areas located between 43º30' and 48º30' LS shifted rather to the coast when comparing to the previous one. During the winter, in... |
| Tipo: Theses and Dissertations |
Palavras-chave: Geographical distribution; Population structure; Feeding; Length-weight relationships; Stomach content; Diets; Seasonal distribution. |
| Ano: 1982 |
URL: http://hdl.handle.net/1834/5028 |
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| Rosecchi, E; Nouaze, Y. |
| Compound indices are often used in the analysis of fish stomach contents to characterize diet. Five of these indices, combining two or three measures of prey importance: weight, abundance and frequency of occurrence, are mathematically compared in this work. Data from a feeding study of sparid fish show that different indices can produce different results. Four classifications of food, in terms of preferences, are applied to Sparidae, compared and discussed. A new method of classifying the prey of fish into groups is proposed. It characterizes the main items in the diet, whatever feeding index is chosen for the analysis. |
| Tipo: Text |
Palavras-chave: Quantitative distribution; Weight; Predation; Stomach content; Feeding. |
| Ano: 1985 |
URL: http://archimer.ifremer.fr/doc/1985/publication-1773.pdf |
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| Registros recuperados: 233 | |
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