A Chinese White Dolphin (Sousa chinesis) was found to strand in a beach in Xiamen on February 2, 2002. For investigating the causes of this death, pathological anatomy was carried out on February 21, 2002 on site, and...A Chinese White Dolphin (Sousa chinesis) was found to strand in a beach in Xiamen on February 2, 2002. For investigating the causes of this death, pathological anatomy was carried out on February 21, 2002 on site, and age determination and other histological pathology analyses were carried out in laboratory later. This specimen was 1.92 m long, and weighted 78 kg. The age was estimated as 1.5 years as an infancy individual. The body shape looked normal, except some skin was off because of decomposing. One fish was found in the stomach. No other fatal pathological changes were found in respiratory, digestive, reproductive and other systems. But, several bloody areas were found underneath the skin, and especially on the surface of the brain. Based on the results above, it is considered that this dolphin was killed by explosion for cleaning up the navigation channel that happened in the area several days before the specimen was found. For protecting the dolphins in this area, some conservation measures are proposed.展开更多
One hundred and eighty-one boat surveys were conducted within 150 days between February and December, 2004 in Xiamen waters, which covered an area about 700 km2. A total of 102 separate sightings were recorded. Habita...One hundred and eighty-one boat surveys were conducted within 150 days between February and December, 2004 in Xiamen waters, which covered an area about 700 km2. A total of 102 separate sightings were recorded. Habitat selection (i.e., water depth, tidal conditions, and distance offshore) were analyzed by using selection frequency and x2-test. The results showed high level of selection for water depth under 20 meters and distance offshore within 1 000 meters, whereas no significant selection was found for tide level, water temperature or tide direction. In addition, for the purpose of providing fundamental information for conservation and management, the utilization of different sections of Xiamen waters was discussed. Furthermore, Xiamen west harbour and waters from Jiyu to Wuyu were identified as the ‘key habitats’ and Dadeng waters may serve as a ‘sanctuary’ for the Xiamen population.展开更多
文摘A Chinese White Dolphin (Sousa chinesis) was found to strand in a beach in Xiamen on February 2, 2002. For investigating the causes of this death, pathological anatomy was carried out on February 21, 2002 on site, and age determination and other histological pathology analyses were carried out in laboratory later. This specimen was 1.92 m long, and weighted 78 kg. The age was estimated as 1.5 years as an infancy individual. The body shape looked normal, except some skin was off because of decomposing. One fish was found in the stomach. No other fatal pathological changes were found in respiratory, digestive, reproductive and other systems. But, several bloody areas were found underneath the skin, and especially on the surface of the brain. Based on the results above, it is considered that this dolphin was killed by explosion for cleaning up the navigation channel that happened in the area several days before the specimen was found. For protecting the dolphins in this area, some conservation measures are proposed.
文摘One hundred and eighty-one boat surveys were conducted within 150 days between February and December, 2004 in Xiamen waters, which covered an area about 700 km2. A total of 102 separate sightings were recorded. Habitat selection (i.e., water depth, tidal conditions, and distance offshore) were analyzed by using selection frequency and x2-test. The results showed high level of selection for water depth under 20 meters and distance offshore within 1 000 meters, whereas no significant selection was found for tide level, water temperature or tide direction. In addition, for the purpose of providing fundamental information for conservation and management, the utilization of different sections of Xiamen waters was discussed. Furthermore, Xiamen west harbour and waters from Jiyu to Wuyu were identified as the ‘key habitats’ and Dadeng waters may serve as a ‘sanctuary’ for the Xiamen population.
