Biomass fluctuation of two dominant lanternfish Diaphus garmani and D. chrysorhynchus with environmental changes in the East China Sea

Distributions and assemblages of larval fish in the East China Sea during the northeasterly and southwesterly monsoon seasons of 2008

“…Nakabo (2002) indicated that this adult species mainly inhabits deep oceanic waters, whereas its larvae are pelagic, abundant in the Kuroshio Current and offshore waters. In general, larvae are pelagic plankton, sensitive to environmental changes (Ohshimo et al, 2012), and their survival depends on the availability of food and suitable temperature. Moreover, Parmesan and Yohe (2003) also indicated that the current context of marked environmental changes may affect the species distributions, natural resources, and biodiversity.…”

Comparative reproductive biology of three dominant myctophids of the genus Diaphus on the slope region of the East China Sea

“…chrysorhynchus, and D. watasei are three of the most abundant myctophids on the slope region of the ECS, off the western coast of Kyushu Island (Yamada et al, 1986;Ohshimo et al, 2012;C. Sassa, unpublished data), and their distribution extends along the slope off the Pacific coast of central and southern Japan (Kawaguchi, 1977;Kawaguchi and Shimizu, 1978).…”

“…Sassa, unpublished data), and their distribution extends along the slope off the Pacific coast of central and southern Japan (Kawaguchi, 1977;Kawaguchi and Shimizu, 1978). Based on acoustic methods, the biomass of D. garmani and D. chrysorhynchus is estimated in the order of several tens of thousands to several hundreds of thousands of metric tons on the ECS slope, off western Kyushu Island (Ohshimo et al, 2012), reflecting the high prey productivity (Longhurst, 2006). Diaphus garmani is categorized as a middle-sized myctophid, reaching approximately 60 mm standard length (SL), while D. chrysorhynchus and D. watasei as large-sized species, reaching 120 mm and 170 mm SL, respectively (Kawaguchi and Shimizu, 1978).…”

“…Diaphus garmani and D. chrysorhynchus are diel vertical migrants and distribute in the benthopelagic layer between 300 and 600 m during the daytime and between 20 and 100 m at night on the slope regions (Clarke, 1973;Kawaguchi and Shimizu, 1978;Ohshimo et al, 2012;Tanaka et al, 2013). On the other hand, D. watasei remains in the benthopelagic layer during both day and night at a depth of 300-600 m over the slope regions, although a small proportion of the juveniles and immature individuals (<100 mm SL) migrate up to 20-100 m layer at night (Nafpaktitis, 1978;Kawaguchi and Shimizu, 1978;Gartner et al, 1997;Yamada et al, 2007;C.…”

Feeding ecology of two lanternfishes Diaphus garmani and Diaphus chrysorhynchus

“…Myctophids are abundant both on the continental shelf and on the continental slope of the ECS. Recent studies have shown that Garman's lanternfish Diaphus garmani Gilbert 1906 and golden‐nosed lanternfish Diaphus chrysorhynchus Gilbert & Cramer 1897 are abundant and dominant myctophids on the continental slope of the ECS, off western Kyushu (Ohshimo, ; Ohshimo et al ., ), whereas skinnycheek lanternfish Benthosema pterotum (Alcock 1890) is abundant over the continental shelf of the ECS (Yamada et al ., ; Sassa et al ., ). Diaphus garmani is one of the most dominant myctophids in the western tropical and subtropical waters of the Pacific Ocean including the Kuroshio, and the slope waters off southern Japan (Sassa et al ., 2003, 2004 a , b ; Brodeur & Yamamura, ; Sassa & Kawaguchi, ), and D. chrysorhynchus is mainly distributed in the slope waters of the North Pacific Ocean (Gjøsaeter & Kawaguchi, ; Brodeur & Yamamura, ).…”