Hydroacoustic studies on the commercially important squid Sthenoteuthis oualaniensis in the South China Sea

Zhang, Jun; Chen, Zuozhi; Chen, Guobao; Peng, Zhang; Qiu, Yongsong; Zhuang, Yao

doi:10.1016/j.fishres.2015.05.003

Cited by 21 publications

(6 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There were habitat differences between the winter and summerautumn stocks, further increasing the difference in the spatial distribution of the stocks. Based on an acoustic analysis, Zhang et al found that in the South China Sea, under natural conditions, the 10-50 m layer is the water layer in which squid mainly gather, and this matches the 25 m water layer chosen in this study [49]. These findings indicate that this water layer is a suitable habitat for the squid population.…”

Section: Habitat Changes Across Life History Stagessupporting

confidence: 78%

Migration Route of Sthenoteuthis oualaniensis in the South China Sea Based on Statolith Trace Element Information

Fan,

Fang,

et al. 2023

Animals

Self Cite

View full text Add to dashboard Cite

Sthenoteuthis oualaniensis (Lesson, 1830) is a pelagic species with a complex population structure and wide migration range. The trace elements in statoliths are effective indicators for reconstructing the life history of an individual. In this study, the trace elements in statoliths were determined via laser ablation inductively coupled plasma mass spectrometry, and a multiple regression tree (MRT) model was used to trace the migration of S. oualaniensis and identify its potential habitats in the South China Sea. Na, Mg, Fe, Sr, and Ba were the effective trace elements, with significant differences found among stocks (p < 0.05). The MRT was divided into five clusters representing five life history stages. The Mg:Ca and Sr:Ca ratios decreased initially and increased thereafter, and the Mg:Ca, Sr:Ca, and Ba:Ca ratios differed significantly among the stages of the life history in each stock (p < 0.05). The hatching water temperatures for the winter and summer–autumn spawning populations were 28.05–28.88 °C (temperature at 25 m) and 27.15–27.92 °C (temperature at 25 m). The winter stock hatched in the southern South China Sea, and the larvae then migrated northwest during the summer monsoon. The summer–autumn stocks hatched in the northern South China Sea, and the larvae migrated southward under the mesoscale closed anticyclonic circulation in the northern South China Sea. These results provide insight into the migration of S. oualaniensis in the South China Sea.

show abstract

Section: Habitat Changes Across Life History Stagessupporting

confidence: 78%

Migration Route of Sthenoteuthis oualaniensis in the South China Sea Based on Statolith Trace Element Information

Fan,

Fang,

et al. 2023

Animals

Self Cite

View full text Add to dashboard Cite

show abstract

“…The South China Sea (SCS) is rich in fishery resources as the largest epicontinental sea in China (Qiu et al, 2008;Zhang et al, 2015), and has formed three traditional fishing areas including north, middle and south fishing area (Chu et al, 2002). And estimating oceanic primary productivity from satellite data becomes more and more significant for areas with large spatio-temporal scale .…”

Section: Introductionmentioning

confidence: 99%

Zone statistics of the oceanic primary productivity for the traditional fishing areas of the open South China Sea based on MODIS products

Zhou¹

2017

Appl Ecol Env Res

View full text Add to dashboard Cite

Abstract. The South China Sea is one of the most important fishing grounds in China and is also a traditional fishing ground. In order to determine the primary productivity products suitable for various traditional fishing areas, this paper is based on three models of VGPM, Eppley-VGPM and CbPM, we estimate the primary and the average monthly data of marine primary productivity in 8 days, a detailed analysis of the differences in 2006-2015 of these products which the traditional fishing areas in the South China Sea on the interannual and seasonal variation and spatial distribution. The results showed: 1) the years of large interannual variability which three models are estimated to obtain are between 2008 and 2012. At the same time, it has been found that these 5 years is also a frequent occurrence of ENSO events, but the specific regulatory mechanisms need to be further studied, 2) data products estimated by each model which reflected the seasonal pattern of each fishing area have inconsistency, 3) the three models can be used to estimate the characteristics which the coastal and estuarine areas are higher than the open sea area, and deep sea basin is the lowest in space, however the NPP values estimated by the three models are quite different, and the highest estimated value is by Eppley-VGPM model.

show abstract

“…Because of the continuous decline of offshore fisheries in recent years, fishing efforts are more often moving into deep water in the central and southern South China Sea. The main commercial fish species, including Yellowfin Tuna Thunnus albacares, Bigeye Tuna T. obesus, Skipjack Tuna Katsuwonus pelamis, Kawakawa Euthynnus affinis, Frigate Mackerel Auxis thazard, Bullet Mackerel A. rochei, and carangid species, are under greater fishing pressure than ever before (Zhang et al 2016a(Zhang et al , 2016b. Stock assessments are a basic way to guide effective management to maintain fishery sustainability.…”

Section: Discussionmentioning

confidence: 99%

“…In this fishery, lamps function as a fish‐aggregating device (Figure 2). The main commercial fish species caught by this fishery in deeper waters of the South China Sea are tuna (family Scombridae) and tuna‐like species and scads (dominated by Mackerel Scad Decapterus macarellus and Shortfin Scad D. macrosoma ) (Zhang et al 2016a; Su et al 2018). These fish stocks are made up of highly migratory species and are exploited by several countries around the South China Sea (Zhang et al 2016b; Tadjuddah et al 2017; Su et al 2018; Silooy et al 2021).…”

Section: Introductionmentioning

confidence: 99%

The initial assessment of an important pelagic fish, Mackerel Scad, in the South China Sea using data‐poor length‐based methods

Xu,

Zhang,

Panhwar

et al. 2023

Mar Coast Fish

View full text Add to dashboard Cite

ObjectiveScads Decapterus spp. occur widely throughout tropical, subtropical, and temperate oceans and are both economically and ecologically important species. They are among the main commercial fish species caught by the light falling‐net fishery in the South China Sea, which is dominated by Mackerel Scad Decapterus macarellus and Shortfin Scad D. macrosoma. Stock assessment is an approach used to guide effective management and maintain fishery sustainability.MethodsTwo data‐poor methods, namely length‐based Bayesian biomass estimation and length‐based spawning potential ratio, were applied to assess the status of Mackerel Scad, the most dominant Decapterus species in the South China Sea. Electronic length–frequency analysis was used to estimate von Bertalanffy growth parameters (asymptotic length Linf and growth coefficient K) to serve as priors.ResultThe results show the estimated Linf and K of Mackerel Scad in the South China Sea as 36.0 cm and 0.37/year, respectively. Estimated natural mortality was 0.74/year, and mean fork length at 50% sexual maturity was 24.29 cm. Length‐based Bayesian biomass estimation analysis showed that the estimated relative stock size had decreased from 1.3 in 2012–2014 to 0.7 in 2019–2021, indicating an overfished status. Length‐based spawning potential ratio analysis showed that the estimated spawning potential ratio for this fishery decreased from 13% to 12%, which is significantly below the limit reference point of 20%.ConclusionOur results obtained through length‐based methods indicate the lower SPR of Mackerel Scad stock was due to catching an excess of juveniles. Therefore, we highlight the need to increase the minimum mesh size in the fishing nets and strengthen international cooperation for conserving this shared stock in the South China Sea.

show abstract

Hydroacoustic studies on the commercially important squid Sthenoteuthis oualaniensis in the South China Sea

Cited by 21 publications

References 39 publications

Migration Route of Sthenoteuthis oualaniensis in the South China Sea Based on Statolith Trace Element Information

Migration Route of Sthenoteuthis oualaniensis in the South China Sea Based on Statolith Trace Element Information

Zone statistics of the oceanic primary productivity for the traditional fishing areas of the open South China Sea based on MODIS products

The initial assessment of an important pelagic fish, Mackerel Scad, in the South China Sea using data‐poor length‐based methods

Contact Info

Product

Resources

About