Fishing bait worm supplies in Japan in relation to their physiological traits

Abstract

Saito, H., Kawai, K., Umino, T. and Imabayashi, H. 2014. Fishing bait worm supplies in Japan in relation to their physiological traits. Memoirs of Museum Victoria 71: 279-287. � � Marketresearchwasconductedfrom�2009�to�2013�toinvestigatethesupplyoflivewormsforfishingbaitinJapan.� Weobtained�25�typesoflivefishingbaitworms,�including�16�speciesofpolychaete,�1�speciesofechiuran,�and�1�species� of sipunculid. These were divided into three groups according to their country of origin: 1) worms supplied from native populations,� fivespecies� (Perinereis wilsoni, Hediste diadroma, Kinbergonuphis enoshimaensis, Pseudopotamilla occelata, and Hydroides ezoensis), 2) worms supplied from both native and non-native populations, three species (Marphysa cf. iwamushi, Halla okudai, and Urechis unicinctus), and 3) worms supplied from non-native populations, 10 species�(Perinereis linea, Alitta virens, Nectoneanthes uchiwa, Namalycastis rhodochorde, Glycera nicobarica, Diopatra sugokai, Marphysa cf. tamurai, Marphysa cf. mossambica, Scoletoma heteropoda, and Sipunculus nudus). Salinities in which no mortality of nereid worms occurred was 5-35 psu in Alitta virens, 5-30 psu in Namalycastis rhodochorde, and 10-35 psu in Perinereis linea. Worms living in temperate areas had a wide temperature tolerance of 5-30 °C in Alitta virens, Perinereis linea, Glycera nicobarica, Marphysa cf. iwamushi, and Scoletoma heteropoda. Tropical species (Namalycastis rhodochorde and Marphysa cf. mossambica) could not survive above 20 °C.