Larval mesopelagic fish assemblages in the Kuroshio–Oyashio transition region of the western North Pacific

Sassa, Chiyuki; Kawaguchi, Kouichi; Taki, Kenji

doi:10.1007/s00227-006-0434-x

Cited by 20 publications

(14 citation statements)

References 21 publications

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“…Although we analyzed pooled data of different annual cohorts over twelve different years to obtain a seasonal picture of reproduction, the GSI of females 20 was remarkably higher during June to August compared with the other months without interannual variations, thus we assume that the spawning season estimated in this study is representative. Based on the occurrence of the larvae and juveniles, D. garmani is considered to spawn from late spring to early autumn in the Kuroshio and the slope waters off central and southern Japan (Sassa and Kawaguchi, 2006;Sassa et al, 2007).…”

Section: Spawning Seasonmentioning

confidence: 99%

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

Sassa

Tanaka

Ohshimo

2016

Deep Sea Research Part I: Oceanographic Research Papers

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Section: Spawning Seasonmentioning

confidence: 99%

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

Sassa

Tanaka

Ohshimo

2016

Deep Sea Research Part I: Oceanographic Research Papers

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“…Being the western boundary currents in the North Pacific, both the Kuroshio and Oyashio Currents have great effects on fisheries, ecosystems and climate (Aoki and Miyashita, 2000;Sakurai et al, 2000;Sakurai, 2007). For O. bartramii larvae that appear in the Kuroshio-Oyashio transition region in the western North Pacific ( Fig.1; Sassa et al, 2007), their distribution and transport patterns from spawning to feeding grounds may be influenced by the Kuroshio meanders. Magnitude of the Oyashio Current can also affect the distribution and abundance of O. bartramii (Shao et al, 2005).…”

Section: The Kuroshio and Oyashio Currentsmentioning

confidence: 97%

A review of interaction between neon flying squid (Ommastrephes bartramii) and oceanographic variability in the North Pacific Ocean

Chen

Qian

et al. 2015

J. Ocean Univ. China

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The neon flying squid (Ommastrephes bartramii) is a short-lived opportunistic species widely distributed in subtropical and temperate waters in the North Pacific Ocean. The life cycle of O. bartramii from planktonic eggs to nektonic adults is closely linked to oceanographic conditions. The fluctuations in O. bartramii abundance and distribution tend to increase and widen continuously due to the heavy influences of ocean-climate events on various spatio-temporal scales. In this study, we reviewed the interaction between O. bartramii and oceanography variability in the North Pacific with respect to large-scale climatic-oceanic phenomena including El Niño, La Niña, Kuroshio, Oyashio and Pacific Decadal Oscillation (PDO), as well as regional environmental variables such as sea surface temperature (SST), sea surface height (SSH), sea surface salinity (SSS), chlorophyll-a (Chl-a) concentration, and plankton density. The population dynamics of O. bartramii is mediated mainly by meso-and large-scale climatic-oceanic events (e.g., Kuroshio and Oyashio Currents) rather than other local environmental conditions (e.g., SST and Chl-a concentration), because all of the oceanographic influences are imposed on the context of large-scale climate changes (e.g., PDO). An unstructured-grid finitevolume coastal ocean model coupled with an individual-based model is proposed to simulate relevant physical-biological oceanographic processes for identifying ocean-climate influence and predicting O. bartramii distribution and abundance in the North Pacific. Future research needs to be focused on improving the knowledge about early life history of O. bartramii and evaluating the relationship between marine physical environment and two separate passive drifting life stages of O. bartramii including free-floating eggs and planktonic paralarvae.

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“…A good biological indicator for observing the role of the geostrophic kinetic energy flux and potential energy anomaly on the zooplankton organisms may be the larvae of the common mesopelagic species ( Vinciguerria lucetia , Diogenichthys laternatus , Benthosema panamense and Triphoturus mexicanus ). Because of their high abundances and widespread distributions, they are important components of the pelagic ecosystem in the Northeastern Pacific Ocean, including the Gulf of California [ 26 – 28 ]. In the Gulf, these larvae have been found to have a strongly heterogeneous distribution from the Midriff Archipelago Region to its southern entrance [ 29 – 31 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of Geostrophic Kinetic Energy on the Distribution of Mesopelagic Fish Larvae in the Southern Gulf of California in Summer/Fall Stratified Seasons

et al. 2016

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Effects of geostrophic kinetic energy flux on the three-dimensional distribution of fish larvae of mesopelagic species (Vinciguerria lucetia, Diogenichthys laternatus, Benthosema panamense and Triphoturus mexicanus) in the southern Gulf of California during summer and fall seasons of stronger stratification were analyzed. The greatest larval abundance was found at sampling stations in geostrophic kinetic energy-poor areas (<7.5 J/m3), where the distribution of the dominant species tended to be stratified. Larvae of V. lucetia (average abundance of 318 larvae/10m2) and B. panamense (174 larvae/10m2) were mostly located in and above the pycnocline (typically ~ 40 m depth). In contrast, larvae of D. laternatus (60 larvae/10m2) were mainly located in and below the pycnocline. On the other hand, in sampling stations from geostrophic kinetic energy-rich areas (> 21 J/m3), where mesoscale eddies were present, the larvae of the dominant species had low abundance and were spread more evenly through the water column, in spite of the water column stratification. For example, in a cyclonic eddy, V. lucetia larvae (34 larvae/10m2) extended their distribution to, at least, the limit of sampling 200 m depth below the pycnocline, while D. laternatus larvae (29 larvae/10m2) were found right up to the surface, both probably as a consequence mixing and secondary circulation in the eddy. Results showed that the level of the geostrophic kinetic energy flux affects the abundance and the three-dimensional distribution of mesopelagic fish larvae during the seasons of stronger stratification, indicating that areas with low geostrophic kinetic energy may be advantageous for feeding and development of mesopelagic fish larvae because of greater water column stability.

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Larval mesopelagic fish assemblages in the Kuroshio–Oyashio transition region of the western North Pacific

Cited by 20 publications

References 21 publications

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

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

A review of interaction between neon flying squid (Ommastrephes bartramii) and oceanographic variability in the North Pacific Ocean

Effects of Geostrophic Kinetic Energy on the Distribution of Mesopelagic Fish Larvae in the Southern Gulf of California in Summer/Fall Stratified Seasons

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