R. Yukami

Density-dependent attributes of schooling in small pelagic fishes

The paper examines density-dependent schooling behaviors in three small pelagic fish species, finding species-specific relationships between population density and school characteristics.

Stronger density-dependent growth of Japanese sardine with lower food availability: Comparison of growth and zooplankton biomass between a historical and current stock-increase period in the western North Pacific

The paper compares density-dependent growth of Japanese sardine in the western North Pacific during a historical stock-increase period and the current period, finding stronger density dependence in the 2010s linked to lower food availability.

Length-length and length-weight relationships for four small pelagic fishes in the Kuroshio-Oyashio current system

The paper estimates length-length and length-weight relationships for four small pelagic fish species in the Kuroshio-Oyashio current system using measurements from 2020 surveys.

Intra- and inter-specific density dependence of body condition, growth, and habitat temperature in chub mackerel (Scomber japonicus)

This study examines how density dependence affects body condition, growth, and habitat temperature in chub mackerel, finding that conspecific and heterospecific abundance negatively impact body condition more than temperature.

Spatio-temporal spawning patterns and early growth of Japanese sardine in the western North Pacific during the recent stock increase

This study examines changes in spawning patterns and early growth of Japanese sardine during a stock increase, finding that shifts in spawning areas and hatch dates correlate with recruitment success.

Spatio-temporal model reduces species misidentification bias of spawning eggs in stock assessment of spotted mackerel in the western North Pacific

The paper uses a spatio-temporal model to reduce species misidentification bias in spotted mackerel stock assessment by incorporating chub mackerel egg density effects.