The occurrence of pipefishes and seahorses (family Syngnathidae)was studied in Urado Estuary,Kochi Prefecture,from April to October 2004.A total of 28 specimens of five species in three genera were collected from intertidal sandy-mud flats in the southern region of Urado Estuary.The occurrence of two species,which are endangered in Kochi Prefecture,Syngnathus schlegeli and Hippichthys(Hippichthys)spicifer, was conifirmed.The former was discovered in Urado Estuary for the first time in over 20 years.Twelve specimens of Hippocampus kuda, a species known from the Ryukyu Islands southward in Japan,were collected from April to October.A single,male H.(H.)spicifer carried eggs in its blood pouch,whilst female of other species had fully
developed ovaries.These facts strongly suggest that spawning and nurturing
of syngnathid fishes occur in Urado Estuary.
Bulletin of the Shikoku Institute of Natural History NO.2
The ectoparasites of wild mammals, obtained recently in Kochi Prefecture, are listed. These parasites include the scabies mites Sarcoptes scabiei, and the tick species Amblyomma testudinarium and Haemaphysalis formosensis on the wild boar Sus scrofa. Tick species H.flava and H.longicornis, and two unidentified species of insect were found on the raccoon dog Nyctereutes procyonoides. The bat fly species Brachytarsina kanoi, Phthiridium hindli, Penicillidia jenynsii and Nycteribia parvula, and the mite species Spinturnix myoti and Ichoronyssus miniopteri were found on the bat species Rhinolophus ferrumequinum, Myotis macrodactylus, and Miniopterus fuliginosus.
In this study eighteen coastal fish species which were previously unknown or poorly known in Kochi Prefecture,southern Japan have been collected from 13 localities. Previously most of these species have only ever been recorded in warmer subtropical water of Japan. On the basis of this study six species have been added to ichthyofauna of Kochi Prefecture:Festucalex erythraeus, Scorpaenodes guamensis, Stegastes fasciolatus, Cheilinus trilobatus, Acanthurus maculices and Rhinecanthus verrucosus. The specimens of Plectorhinchus gibbosus, S.fasciolatus,S.fasciolatus,C.trilobatus and A.maculiceps represent the most northerly records for each of these species.
In this study ,the occurrence of the following three small crabs species(Domecia glabra,Tetralia glaberrima and Tetralia nigrolineata)associated with Acropora sp. have been reported in Shimizu Port(32°45′N，132°57′E）Kochi Prefecture.Domecia glabra and T.nigrolineata were reported for the first time in the kochi Prefecture.In addition,the recorded for T.nigrolineata represented the most northely record for this species.The specimens of T.glaberrima collected from outside Tosa Bay represented the second record of this species from Kochi Prefecture.New Japanese names for Domeciidae and Tetraliidae have been proposed,and the Japanese names for T.glaberrima and T.nigrolineata were discussed.
土佐清水市清水港内のイシサンゴ類Acropora sp. から得られた３種のカニ類
The distributions of eight crab species belonging to five genera in the
families,Hymenosomat idea,Pilumnidae and Varunidae,were studied on the
basis of 1390 specimens collected in 2003 and 2004 from brackish waters
in the rivers and estuaries in Kochi Prefecture,in southern Japan.Halicarcinus messor(Hymenosomatidae),Pilumnopeus marginatus(Pilumnidae)and Ptychoganthus capillidigitatus(Varunidae) were recorded for the first time in the Kochi Prefecture.A total 192 specimens confirmed the widespread occurrence of Neorhynchoplax okinawaensis(Hymenosomatidae) in the study area.Prior to this study only five individuals of N. okinawaensis had been recorded as Halicarcinus orientalis from Urado Estuary,in Kochi City.Pilumnopeus makianus and Ptychognathus ishii were common species in this estuary,but the precise distributions of these species were unknown prior to this study. Specimens of two varunid species,Acmaeopleura toriumii and A.pavula,were also collected. The presence of these species suggested that the
brackish water crab fauna in the present study area contained rare Japanese
species,that were similar to those found on the western coast of the Kii