Introduction

China is a country with more than 4 million km2 of marine waters, including the Bohai Sea, Yellow Sea, East China Sea and South China Sea. These cover a diverse variety of climatic environments, ranging from temperate, through subtropical to equatorial tropical. This ecological environment is complex and diverse, and seasonal climatic variations can be quite dramatic. The large coastal regions provide rich fishery resources for China, with more 3,000 species of marine fishes reported (Zhu, 1998). Due to the variety of ecological environments and fish stocks, these waters harbour large numbers of parasitic worms.

Our knowledge of the trematode parasites of Chinese marine fishes and their distribution is still limited. Tseng (1933) was the first investigator; he described eight species of digeneans of marine fishes from off Tsingtao, Shandong Province, China. Subsequently, no further investigations were made on the digenean fauna of marine fishes of China until the work of Ku & Shen (1964a). Since 1964, Gu & Shen (19761985), Liu (19932003b), Shen (19821995), Shen & Qiu (1995); Tang (1981), Wang (19801991), among others, published many studies of the digeneans of Chinese marine fishes, such that 630 species of have now been reported.

The purpose of this paper is to list the known digeneans from off the coasts of China and summarise data on their hosts, distribution in Chinese waters and records.

Methods

Table 1 was compiled from original papers. The parasite species are presented in alphabetical order under family, subfamily (where appropriate) and genus. Their hosts, geographical location of the records and references to the records and (where appropriate) original descriptions of the species are also listed. The classification of parasites and all of the valid scientific names of the fish hosts have been updated according to the three volumes of the ‘CABI Keys to the Trematoda’ (Gibson et al., 2002; Jones et al., 2005; Bray et al., 2008) and ‘FishBase’ (Froese & Pauly, 2009), respectively.

Table 1 Digenean parasites of marine fishes reported from Chinese waters

Mention of a digenean and its host species in this paper does not necessarily imply that we agree with its validity or identification.

Comments

From this list, it is clear that digenean parasites in Chinese marine waters have a variety of different levels of host-specificity. The majority have a single fish host, with some having two or three final hosts, but there are 13 known definitive hosts for Erilepturus hamati (Yamaguti, 1934).

As mentioned above, there are various ecological environments and fish hosts off the coast of China. The species of parasite listed above likely represent only a proportion of the marine digenean fauna of China. Much more effort will be required in order to describe and record the entire trematode fauna of marine fishes in this region.