Biswas Tanima, Bandyopadhyay Probir Kumar
Parasitology Laboratory, Department of Zoology, University of Kalyani, Kalyani, 741235 West Bengal India.
J Parasit Dis. 2014 Sep;38(3):297-301. doi: 10.1007/s12639-012-0230-0. Epub 2013 Jan 23.
The coastal region of West Bengal is bestowed with a wide range of natural forest and aquatic resources. The estuarine complex is a culmination of the interaction of land, sea and freshwater. It offers diverse specialised habitats such as mangroves, non vegetated mudflats, inter tidal zones and reclaimed areas. Such areas are home to a number of terrestrial, freshwater and marine communities. Edible oyster resources in these regions are Crassostrea gryphoides and Saccostrea cucullata, which are the keystone species found in the intertidal zone and can tolerate huge variation of salinity. These are used as food by local people and marketed to earn cash. The population of this species has been declined due to parasitic infection and pollution. There are many protozoan parasites which infect these oysters causing diseases. During survey period, a protozoan parasite of the genus Cristigera have been observed only from the edible oyster Crassostrea gryphoides collected from Kaikhali and Frasergunj among three selected sites namely Kaikhali, Frasergunj and Digha of West Bengal mainly during monsoon and post-monsoon season. Considering such rare and specific prevalence of Cristigera sp, it may be considered as potential bio-indicator.
西孟加拉邦的沿海地区拥有丰富多样的天然森林和水产资源。河口复合体是陆地、海洋和淡水相互作用的产物。它提供了各种特殊的栖息地，如红树林、无植被的泥滩、潮间带和开垦地区。这些地区是许多陆地、淡水和海洋群落的家园。这些地区的可食用牡蛎资源有近江牡蛎和僧帽牡蛎，它们是潮间带的关键物种，能够耐受盐度的巨大变化。当地人将这些牡蛎作为食物，并进行销售以赚取现金。由于寄生虫感染和污染，这些物种的数量已经下降。有许多原生动物寄生虫感染这些牡蛎并导致疾病。在调查期间，仅在西孟加拉邦三个选定地点（即凯哈利、弗拉瑟贡杰和迪加）中的凯哈利和弗拉瑟贡杰采集的可食用近江牡蛎中观察到了一种名为Cristigera属的原生动物寄生虫，主要发生在季风季节和季风后季节。考虑到Cristigera属如此罕见和特定的流行情况，它可被视为潜在的生物指标。
