Differences in the Egg and Clutch Sizes of the Prawn Macrobrachium nipponense (de Haan) between Brackish and Fresh Waters of a River

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概要

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• The egg and clutch sizes of the prawn Macrobrachium nipponense were compared among local populations distributed from the estuary to the upper waters of a rivei. The prawns were divided into two groups according to the discontinuous differences in their reproductive characters: the estuarine group spawns a great number of small eggs and the upper freshwater group spawns a small number of large eggs. The reproductive effort per spawning expressed as the relative amount of egg matter to body weight was greater in the estuarine group. The berried females were smaller in the upper waters, but egg size had no correlation to body size in each group. The significance of the difference in the reproductive characteristics between the two groups in discussed in regard to the difference in the environmental conditions of the habitat.

• 社団法人日本動物学会の論文
• 1983-03-25

著者

• Mashiko Kazuo

  Department Of Zoology Faculty Of Medicine Teikyo University

• Mashiko Kazuo

  Department Of Zoology Faculty Of Medicine Teikyo Universitey

関連論文

• Evidence of Differentiation between the Estuarine and Upper Freshwater Population Inhabiting the Same Water System in the Long-armed Prawn Macrobrachium nipponense (de Haan)
• On the Relation between Digestibility and Amount of Food Intake of an Eleotrid Goby, Odontobutis obscurus
• Sexual Dimorphism of the Cheliped in the Prawn Macrobrachium nipponense (de Haan) and Its Significance in Reproductive Behavior
• Comparison of Survival and Development between Large and Small Neonates of a Freshwater Prawn under Starvation Conditions(Behavior Biology and Ecology)
• Differences in the Egg and Clutch Sizes of the Prawn Macrobrachium nipponense (de Haan) between Brackish and Fresh Waters of a River

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