Freshwater migration and feeding habits of juvenile temperate seabass Lateolabrax japonicus in the stratified Yura River estuary, the Sea of Japan

Fuji, Taiki; Kasai, Atsushi; Suzuki, Keita W.; Ueno, Masahiro; Yamashita, Yoh

doi:10.1007/s12562-010-0258-y

Cited by 26 publications

(30 citation statements)

References 20 publications

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“…High turbidity can also result from eutrophication and increased input of fine sediments induced by anthropogenic activities, as reported in Hiroshima Bay [3] and the Baltic Sea [4,5]. Larval fishes, such as ayu Plecoglossus altivelis altivelis, anchovy Engraulis japonicus, red sea bream Pagrus major, and seabass Lateolabrax japonicus, often utilize such turbid coastal areas as nursery habitat [6][7][8][9][10][11][12]. Ayu larvae have a shirasu (i.e., an elongate and transparent form of) larval period, and their densities tend to be higher in turbid areas than in clear waters [13].…”

Section: Introductionmentioning

confidence: 99%

Effects of turbidity on survival of larval ayu and red sea bream exposed to predation by jack mackerel and moon jellyfish

et al. 2011

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We conducted laboratory experiments to examine the effects of turbidity on the survival of red sea bream Pagrus major and ayu Plecoglossus altivelis altivelis larvae when exposed to either visual (jack mackerel juveniles) or tactile (moon jellyfish) predators. The experiments were conducted in 30-l tanks with three different levels of turbidity obtained by dissolving 0, 50, or 300 ppm kaolin. Predators were introduced to the experimental tanks followed by larvae of either red sea bream (mean ± standard deviation 6.1 ± 0.3 to 11.4 ± 2.1 mm standard length) or ayu (6.6 ± 0.3 and 24.4 ± 1.8 mm). When exposed to jack mackerel, the mean survival rate of larvae was significantly higher in 300 ppm treatments compared with the other turbidity levels. When exposed to moon jellyfish, however, there was a less marked difference in the survival rates among different turbidity treatments. Survival rates of ayu larvae exposed to moon jellyfish were generally lower than those of red sea bream. Our study indicates that anthropogenic increases of turbidity may increase the relative impact of jellyfish predation on fish larvae.

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Section: Introductionmentioning

confidence: 99%

Effects of turbidity on survival of larval ayu and red sea bream exposed to predation by jack mackerel and moon jellyfish

et al. 2011

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“…After the onshore transport, early juveniles at the size of c . 20 mm standard length (SL) are distributed in the freshwater zone of the Yura River estuary as well as in the various coastal areas of Tango Bay in April and reside there until July (Fuji et al ., , ).…”

Section: Methodsmentioning

confidence: 99%

Importance of estuarine nursery areas for the adult population of the temperate seabass Lateolabrax japonicus, as revealed by otolith Sr:Ca ratios

Fuji

Kasai

Ueno

et al. 2016

Fisheries Oceanography

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Otolith Sr:Ca ratios were used to evaluate the contribution of estuarine nursery areas to the temperate seabass (Lateolabrax japonicus) population in Tango Bay, the Sea of Japan. Otolith Sr:Ca ratios of juveniles collected from freshwater, brackish and coastal areas were analysed to determine a criterion for distinguishing whether individuals used estuarine or coastal areas as nurseries. Otolith Sr:Ca ratios of adult seabass collected around Tango Bay were also analysed to detect the records of salinity that juveniles experienced and to estimate the contribution of each habitat. Sr:Ca ratios of the edges of otoliths of juveniles from freshwater areas were 2.4 9 10 À3 in average, which were significantly lower than those of juveniles collected from a coastal area (4.9 9 10 À3 in average) owing to differences in salinity conditions among these areas. Based on the threshold criterion determined by this difference, 39 out of 107 (36%) adult seabass were estimated to have used the estuary as a nursery during their juvenile stage according to their Sr:Ca chronologies. Despite the small area covered by estuarine nurseries compared with coastal waters, the Yura River estuary contributed considerably to the adult seabass population. This indicates estuaries play an important role as nurseries for seabass juveniles, and it should be noted that the estuaries are important nurseries to conserve the stocks of coastal fishes.

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“…Juvenile temperate seabass and Japanese flounder use the shallow coastal waters of Tango Bay from April to autumn as a nursery ground and mainly consume mysids (Maeda 2002, Fuji et al 2010, Islam et al 2010, Take no 2010. Because the juveniles of both of these fishes prefer epibenthic to sand-burrowing mysids as prey items (Hirota et al 1990, Fuji et al 2010, Takeno 2010, O. japonica is likely to be the dominant prey for the juveniles of these two commercially valuable fish in this area.…”

Section: Ecological Significance Of Mysid Population Dynamicsmentioning

confidence: 99%

“…Because the juveniles of both of these fishes prefer epibenthic to sand-burrowing mysids as prey items (Hirota et al 1990, Fuji et al 2010, Takeno 2010, O. japonica is likely to be the dominant prey for the juveniles of these two commercially valuable fish in this area. However, the maximum density of O. japonica recorded in this study ranged from 100 to 200 ind.…”

Section: Ecological Significance Of Mysid Population Dynamicsmentioning

confidence: 99%

“…This species dominates the mysid community in Tango Bay, the western part of Wakasa Bay in the Sea of Japan, and is one of the main food items of juvenile Japanese flounder Paralichthys olivaceus (Temminck & Schlegel, 1846), temperate seabass Lateolabrax japonicus (Cuvier, 1828), and sand shrimp Crangon uritai Hayashi & Kim, 1999(Minami 1982, Fuji et al 2010, Antonio et al 2011.…”

Section: Introductionmentioning

confidence: 99%

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Population dynamics and reproductive biology of the mysid <i>Orientomysis japonica</i> in Tango Bay, Japan

Akiyama

Ueno

Yamashita

2015

Plankton Benthos Res

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Abstract:The mysids, Orientomysis spp., are common in shallow coastal waters and estuaries in Japan, and are reported to be one of the main prey items for juveniles of many commercially important fish species. Some studies have suggested that the seasonal dynamics of mysids are an important factor determining the biomass and production structure of demersal fish communities. In this study, seasonal variation in the population structure and reproductive traits of Orientomysis japonica Marukawa, 1928 were investigated in Tango . Juveniles and immature individuals dominated the population (>80%) in spring and decreased in summer (<50%). Brooding females were captured year-round with mean body lengths ranging from 6.9 (August 2007) to 13.1 mm (February 2008). Body lengths of brooding females were negatively correlated with temperature. Brood size ranged from 1 to 102 and increased with female body length. The body sizes of all embryonic/larval stages within the marsupium were also negatively correlated with temperature. These results suggest that numerous large offspring released by the highly reproductive overwintering generation led to density increases and the maintenance of a high population density, while conversely, the summer-autumn generation exhibited repetitive shortterm reproduction under high temperatures.

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Freshwater migration and feeding habits of juvenile temperate seabass Lateolabrax japonicus in the stratified Yura River estuary, the Sea of Japan

Cited by 26 publications

References 20 publications

Effects of turbidity on survival of larval ayu and red sea bream exposed to predation by jack mackerel and moon jellyfish

Effects of turbidity on survival of larval ayu and red sea bream exposed to predation by jack mackerel and moon jellyfish

Importance of estuarine nursery areas for the adult population of the temperate seabass Lateolabrax japonicus, as revealed by otolith Sr:Ca ratios

Population dynamics and reproductive biology of the mysid <i>Orientomysis japonica</i> in Tango Bay, Japan

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