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首页> 外文期刊>Bulletin de la Societe Zoologique de France >EURYDICE DOLLFUSI MONOD, 1930, CRUSTACE ISOPODE INTERSTITIEL : DESCRIPTION, NOTES SUR L'ETHOLOGIE ET L'ECOLOGIE DE L'ESPECE
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EURYDICE DOLLFUSI MONOD, 1930, CRUSTACE ISOPODE INTERSTITIEL : DESCRIPTION, NOTES SUR L'ETHOLOGIE ET L'ECOLOGIE DE L'ESPECE

机译：EURYDICE DOLLFUSI MONOD，1930年，同位异形体的间断：描述，物种的生态学和生态学注释

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摘要

Eurydice dollfusi is an interstitial isopod Crustacean. It was recorded for the first time in Tunisia by DELAMARE DEBOUTTEVILLE in 1953. We have collected it, numerously, in north of Cap Gammarth (Gulf of Tunis). The morphological differences between the different species of the genus Eurydice are always appreciated with difficulty; therefore a detailed description of the species is given. The main morphological features of the species are: 1. the epimeral plates of sixth and seventh thoracic segments are prolonged into a spine; 2. the triangular shape of the pleotelson and the ornamentation of the setaa of the posterior margin; 3. the reduced length of uropods. These discriminate features has permitted us to establish a key to rapidly determine the different species of the genus Eurydice recorded in the Maghreb. Ethology. The Tunisian species has a double life: a nocturnal pelagic marine life and a diurnal interstitial life. The rhythm of activity is maintained in laboratory during a few days. Examination of the stomach contents has revealed the presence of crustacean fragments, annelid setae and chloroplasts. Swimming is very fast, by means of beating pleopods. The animals show numerous branched chromatophores on the tergal surface of the body ; these chromatophores contain a black pigment which display or contracts according to the environmental conditions. The study of chromatic behaviour of adults was carried out under artificial conditions; it showed that complexe display of dark pigment is obtained in 110 minutes. Ecology. The animals' distribution in the sand, according to depth, has been studied. We found that Eurydice are completely absent below depth of 30 centimetres. A granulo-metric analysis of the sand' samples is composed of grains was carried out to characterize diameter between 125 and 250 micrometers. The percentage of calcite present in 20 milligrams of sand sample is 24,5%. Using X-rays technique, in this same sample, we have determined the percentage of two other minerals, quartz (72%) and feldspath (3,5%).
机译：Eurydice dollfusi是一种间质的等足类甲壳动物。 1953年，DELAMARE DEBOUTTEVILLE在突尼斯首次录制了该唱片。我们在Cap Gammarth（突尼斯湾）北部收集了很多唱片。人们总是很难理解Eurydice属不同物种之间的形态差异。因此，对该物种进行了详细描述。该物种的主要形态特征是：1.第六和第七胸椎节段的椎板延长成脊柱； 2.褶皱的三角形形状和后缘刚毛的装饰； 3.减少了足足的长度。这些有区别的特征使我们能够建立一个关键，以快速确定马格里布记录的Eurydice属的不同物种。民族学。突尼斯物种具有双重生命：夜间中上层海洋生物和昼间间隙生物。在实验室中保持几天的活动节奏。胃内容物的检查表明存在甲壳类碎片，肘节菌和叶绿体。游泳是非常快的，可以通过打动脚足类动物来实现。这些动物在人体的总表面上显示出许多分支的染色体;这些色谱包含一种黑色颜料，该黑色颜料会根据环境条件显示或收缩。对成年人色行为的研究是在人工条件下进行的。结果表明，在110分钟内即可得到深色颜料的复合显示。生态。根据深度研究了动物在沙子中的分布。我们发现在30厘米以下深度完全没有Eurydice。对由颗粒组成的沙子样品进行了粒度分析，以表征直径在125至250微米之间。存在于20毫克砂样品中的方解石百分比为24.5％。使用X射线技术，在同一样本中，我们确定了其他两种矿物质的百分比，石英（72％）和长石（3.5％）。

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