Catch fluctuations of the diamond squid Thysanoteuthis rhombus in the Sea of Japan and models to forecast CPUE based on analysis of environmental factors

Miyahara, Kazutaka; Ota, Taro; Kohno, Naoki; Ueta, Yukio; Bower, John R.

doi:10.1016/j.fishres.2004.10.013

Cited by 21 publications

(26 citation statements)

References 23 publications

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“…During 1998During -2003 annual catches increased to 500-1200 t. Possible causes for this increase include increased fishing effort and increased biomass associated with warmer temperatures in the Sea of Japan; recruitment into the fishery off Hyogo Prefecture in fall is positively related to seawater temperatures 600 km upstream in the Tsushima Strait in June (Fig. 3), and several models incorporating environmental indices near the strait (seawater temperature, salinity and sea level) have been shown to accurately predict CPUE in the fishery (Miyahara et al, 2005). The fishery in the Sea of Japan usually runs from July to February, with highest catches occurring in September-December (Omoto et al, 1998).…”

Section: Sea Of Japanmentioning

confidence: 99%

The diamond squid (Thysanoteuthis rhombus): A review of the fishery and recent research in Japan

Bower

Miyahara²

2005

Fisheries Research

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Section: Sea Of Japanmentioning

confidence: 99%

The diamond squid (Thysanoteuthis rhombus): A review of the fishery and recent research in Japan

Bower

Miyahara²

2005

Fisheries Research

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“…2000; L. vulgaris and L. forbesi in the English Channel, Robin & Denis 1999). Similarly, catch fluctuations of Thysanoteuthis rhombus are closely related with water temperature, salinity and sea level (Miyahara et al 2005). Dawe et al (2007) also documented opposite responses to oceanographic variations of 2 sympatric squid species in the northwest Atlantic Ocean.…”

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confidence: 94%

Bottom-up control of common octopus Octopus vulgaris in the Galician upwelling system, northeast Atlantic Ocean

Otero

Álvarez‐Salgado²,

González³

et al. 2008

Mar. Ecol. Prog. Ser.

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This paper investigates the possible underlying causes of the wide interannual fluctuations in catch of the common octopus Octopus vulgaris Cuvier, 1797 in one of the main small-scale fisheries off the coast of Galicia (northwest Spain). Galicia is at the northern boundary of the Iberian-Canary current upwelling system in the northeast Atlantic Ocean, where local winds induce seasonal upwelling, largely driving the annual cycles of primary and secondary production. We hypothesize that such dynamics are also fundamental for the survival of the planktonic stages of octopus and set the year class strength. We address this hypothesis by investigating the influence of upwelling on time-series of octopus fishery data. Wind stress structure during the spring-summer (prior to the hatching peak) and autumn-winter (during the planktonic stage) was found to affect the early life phase of this species, and explains up to 85% of the total variance of the year-to-year variability of the adult catch. Despite this bottom-up modulation via environmental conditions, our results also provide evidence for a between-cohort density-dependent interaction, probably caused by cannibalism and competition for habitat.KEY WORDS: Octopus vulgaris · Phytoplankton · Zooplankton · Fisheries · Bottom-up control · Upwelling · NE Atlantic Ocean Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 362: [181][182][183][184][185][186][187][188][189][190][191][192] 2008 unclear. Nevertheless, some environment -biology links have been found between recruitment or abundance and sea surface temperature (SST) in different areas (Loligo gahi in the southwest Atlantic, Agnew et al. 2000; L. vulgaris and L. forbesi in the English Channel, Robin & Denis 1999). Similarly, catch fluctuations of Thysanoteuthis rhombus are closely related with water temperature, salinity and sea level (Miyahara et al. 2005). Dawe et al. (2007) also documented opposite responses to oceanographic variations of 2 sympatric squid species in the northwest Atlantic Ocean. However, in other squid species, relationships with oceanographic processes remain unresolved (e.g. Martialia hyadesi, González et al. 1997).The common octopus Octopus vulgaris Cuvier, 1797 is one of the best studied cephalopods worldwide and the subject of an active fishery (see Otero et al. 2005 and references therein); however, little is known about the influence of environmental variability on the dramatic annual fluctuations of octopus catch. Year-to-year changes of this species have been related to coastal retention processes (Faure et al. 2000), water temperature (Balguerías et al. 2002) and rainfall (Sobrino et al. 2002). In Galician waters, the reproductive cycle of O. vulgaris appears to be tuned to seasonality in upwelling. There is one peak of spawning in spring time. The embryonic development lasts up to 4 mo, depending on water temperature, and the hatching peak occurs at the end of summer through the beginning of autumn of a given year (Year t)...

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“…Tamaki (1987) reported that fishing conditions for diamond squid Thysanoteuthis rhombus in the Sea of Japan could be forecasted based on flow pattern and strength of the Tsushima Current, and water temperature on fishing grounds, but he did not clearly quantify any of these relationships. Miyahara et al (2005) analyzed the fluctuation of T. rhombus and developed models to forecast catch per unit effort (CPUE) based on environmental factors.The neon flying squid Ommastrephes bartramii is an oceanic cephalopod widely distributed in subtropical and temperate waters of the world (Roper et al 1984). It supports a major commercial squid fishery in the northwest Pacific Ocean.…”

mentioning

confidence: 99%

Influence of surface oceanographic variability on abundance of the western winter-spring cohort of neon flying squid Ommastrephes bartramii in the NW Pacific Ocean

Cao¹,

Chen²,

Chen³

2009

Mar. Ecol. Prog. Ser.

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Abundance of the Ommastrephes bartramii winter-spring cohort fluctuated greatly from 1995 to 2004. To understand how abundance was influenced by sea surface conditions, we examined the variations in the proportion of thermal habitats with favourable sea surface temperature (SST). The SST data of both the spawning and feeding grounds were used to calculate the monthly proportion of favourable-SST areas (PFSSTA). Catch per fishing day per fishing boat (catch per unit effort, CPUE) of the Chinese mainland squid-jigging fleet was used as squid abundance index. The relationships between CPUE and monthly PFSSTA at spawning and feeding grounds were analyzed, and the relationship between CPUE and selected PFSSTA was quantified with a multiple linear regression model. Results showed that February PFSSTA at the spawning ground and August to November PFSSTA at the feeding ground could account for about 60% of the variability in O. bartramii abundance between 1995 and 2004, that February was the most important period influencing squid recruitment during the spawning season, and that feeding ground PFSSTA during the fishing season would influence CPUE by causing squid to aggregate. Our forecast model was found to perform well when we compared the model-predicted CPUEs and the average CPUEs observed during August to November in 2005 and 2006 from the Chinese squid-jigging fishery. KEY WORDS: Sea surface temperature · Abundance index · Ommastrephes bartramii · Northwest Pacific Ocean Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 381: [119][120][121][122][123][124][125][126][127] 2009 their favourable-SST areas for larval development (Sakurai et al. 2000). As a result, environmental indices are increasingly being used to predict recruitment strength in squid (Agnew et al. 2002). Tamaki (1987) reported that fishing conditions for diamond squid Thysanoteuthis rhombus in the Sea of Japan could be forecasted based on flow pattern and strength of the Tsushima Current, and water temperature on fishing grounds, but he did not clearly quantify any of these relationships. Miyahara et al. (2005) analyzed the fluctuation of T. rhombus and developed models to forecast catch per unit effort (CPUE) based on environmental factors.The neon flying squid Ommastrephes bartramii is an oceanic cephalopod widely distributed in subtropical and temperate waters of the world (Roper et al. 1984). It supports a major commercial squid fishery in the northwest Pacific Ocean. Japan began the commercial fishery in 1974 after catches of the Japanese common squid Todarodes pacificus dropped sharply during the early 1970s; Korea and Taiwan, ROC, followed suit. In the late 1980s, with the development of a drift-netting fishery, annual catch increased rapidly. Estimated annual catch varied from 150 000 to 350 000 t in the 1980s and 1990s (Bower & Ichii 2005). Mainland China started a small-scale commercial neon flying squid fishery in 1994; since then the fishery has expanded greatly. The annual catch...

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Catch fluctuations of the diamond squid Thysanoteuthis rhombus in the Sea of Japan and models to forecast CPUE based on analysis of environmental factors

Cited by 21 publications

References 23 publications

The diamond squid (Thysanoteuthis rhombus): A review of the fishery and recent research in Japan

The diamond squid (Thysanoteuthis rhombus): A review of the fishery and recent research in Japan

Bottom-up control of common octopus Octopus vulgaris in the Galician upwelling system, northeast Atlantic Ocean

Influence of surface oceanographic variability on abundance of the western winter-spring cohort of neon flying squid Ommastrephes bartramii in the NW Pacific Ocean

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