Ministère des Pêches et des Océans, Institut Maurice-Lamontagne C. P. 1000, Mont-Joli, Québec, G5H 3Z4 Canada.
J Fish Biol. 2009 Jun;74(9):1970-84. doi: 10.1111/j.1095-8649.2009.02292.x.
This study describes catches of Anguilla rostrata glass eels and associated oceanographic conditions in the St Lawrence Estuary and Gulf. Ichthyoplankton survey data suggest that they enter the Gulf primarily in May, migrate at the surface at night, and disperse broadly once they have passed Cabot Strait. They arrive in estuaries beginning at about mid-June and through the month of July. Migration extends west up to Québec City, in the freshwater zone of the St Lawrence Estuary, 1000 km west of Cabot Strait. Anguilla rostrata glass eels travel between Cabot Strait and receiving estuaries at a straight-line ground speed of c. 10-15 km day(-1). Catches of fish per unit effort in estuaries in the St Lawrence system are much lower than those reported for the Atlantic coast of Canada. Low abundance of A. rostrata glass eels in the St Lawrence system may be due to cold surface temperatures during the migration period which decrease swimming capacity, long distances from the spawning ground to Cabot Strait and from Cabot Strait to the destination waters (especially the St Lawrence River), complex circulation patterns, and hypoxic conditions in bottom waters of the Laurentian Channel and the St Lawrence Estuary.
本研究描述了安圭拉鳗玻璃幼鱼的捕捞情况和圣劳伦斯河口和海湾的相关海洋条件。浮游幼鱼调查数据表明，它们主要在 5 月进入海湾，夜间在水面洄游，一旦通过卡博特海峡就广泛分散。它们大约在 6 月中旬开始进入河口，并持续到 7 月。洄游一直延伸到魁北克市，在圣劳伦斯河口的淡水区，距离卡博特海峡以西 1000 公里。安圭拉鳗玻璃幼鱼在卡博特海峡和接收河口之间的直线地速约为 10-15 公里/天。圣劳伦斯系统中河口的鱼类单位捕捞量远低于加拿大大西洋沿岸的报告。安圭拉鳗玻璃幼鱼在圣劳伦斯系统中的数量较少可能是由于洄游期间的表层水温较低，降低了游泳能力，从产卵场到卡博特海峡以及从卡博特海峡到目的地水域（特别是圣劳伦斯河）的距离较长，复杂的环流模式以及劳伦森海峡和圣劳伦斯河口底层水域的缺氧条件。
