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Bibliography of the Maurice Lamontagne Institute

Hélène DIONNE

GREGOIRE, F., H. DIONNE, C. LÉVESQUE, 1994. Fat content of Atlantic mackerel (Scomber scombrus L.) in 1991 and 1992. Can. Ind. Rep. Fish. Aquat. Sci., 220, 69 p .

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The fat content of mackerel (Scomber scombrus) in the Gulf of St. Lawrence changes greatly throughout the season. The lowest values are found at the beginning of the season, before the spawn, and the highest values during the fall. The fat content also changes with the size of the fish. For example, during the fall, the biggest fishes are also the fastest. The fat accumulation is faster for the biggest fishes in such a way that the difference in fat, between these fishes and mackerel of a lower size, increases during the season. There is no increase of the fat content for the immature fishes. On the other hand, there is an inverse relationship between fat and water contents. The fat and water contents sum increases with high values of fat content. Seasonal cycle of the fat content for the northern population is different from the southern population cycle. Minimum and maximum values are identical, except that there is a lag between the two cycles. The fat content could be helpful, at a certain specific time during the season, to recognize the population of origin.

GRÉGOIRE, F., H. DIONNE, C. LÉVESQUE, 1994. Contenu en gras chez le maquereau bleu (Scomber scombrus L.) en 1991 et 1992. Rapp. can. ind. sci. halieut. aquat., 220, 79 p .

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The fat content of mackerel (Scomber scombrus) in the Gulf of St. Lawrence changes greatly throughout the season. The lowest values are found at the beginning of the season, before the spawn, and the highest values during the fall. The fat content also changes with the size of the fish. For example, during the fall, the biggest fishes are also the fastest. The fat accumulation is faster for the biggest fishes in such a way that the difference in fat, between these fishes and mackerel of a lower size, increases during the season. There is no increase of the fat content for the immature fishes. On the other hand, there is an inverse relationship between fat and water contents. The fat and water contents sum increases with high values of fat content. Seasonal cycle of the fat content for the northern population is different from the southern population cycle. Minimum and maximum values are identical, except that there is a lag between the two cycles. The fat content could be helpful, at a certain specific time during the season, to recognize the population of origin.