Distribution, body size and maturation pattern of the blue-lined octopus &lt;i&gt;Hapalochlaena&lt;/i&gt; cf &lt;i&gt;fasciata&lt;/i&gt; in Japan

Yamate, Yuta; TOYOMASU, NANA; Takegaki, Takeshi

doi:10.2331/suisan.22-00001

Cited by 3 publications

(3 citation statements)

References 12 publications

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“…Only one of H. fasciata on the coast of Jeju Island in Korea was reported until 2010, but the octopuses were reportedly widely distributed up to that point along the Japanese coast. Recently, a similar geographic distribution on the basis of live specimen collection from Japanese coasts was also reported by Yamate et al [21]. These previous studies demonstrated that the blue-lined octopus recently shifted its distribution northward within the Japanese coast, but there were no observations in Korea.…”

Section: Distribution Of Blue-lined Octopus On the Korean Coastsupporting

confidence: 76%

“…In our previous study, we found that the octopus was most frequently observed in the spring season (April) on the Japanese coast in the East/Japan Sea [3]. Yamate et al [21], however, reported that relatively large numbers of octopuses were captured along the southeast and southwest coasts of Japan during the fall and winter seasons. Thus, the blue-lined octopuses are found throughout the year on the Korean and Japanese coasts, but there was no clear pattern in the seasonal occurrence among the three studies, including the present study.…”

Section: Distribution Of Blue-lined Octopus On the Korean Coastmentioning

confidence: 83%

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Tetrodotoxin and the Geographic Distribution of the Blue-Lined Octopus Hapalochlaena fasciata on the Korean Coast

Kim

Cho

et al. 2023

Toxins

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The genus Hapalochlaena, including the blue-lined octopus Hapalochlaena fasciata (H. fasciata), is highly toxic. Venomous, blue-lined octopuses were recently found in Korea, but their toxicity, toxin composition, and distribution remain largely unknown. Here we estimated the geographic distribution of the organisms along the Korean coast and clarified their toxicity. Tetrodotoxin (TTX) was present in all three specimens of H. fasciata examined, although the toxicity varied largely between individuals. The mean TTX concentration in the whole body of the three specimens was 6.5 ± 2.2 μg/g (range 3.3–8.5 μg/g). Among the body parts examined, the salivary glands exhibited the highest concentration (22.4 ± 9.7 μg/g). From 2012 to 2021, 26 individuals were obtained nearly every month from different regions of the Korean coast. A non-fatal case of a blue-lined octopus bite was reported along the Korean coast in June 2015. This is the first report on the widespread distribution of blue-lined octopuses on the Korean coast and TTX detection. The widespread distribution of the TTX-bearing H. fasciata along the Korean coast within the temperate zone indicates that the species may soon become a serious health issue in Korea. The toxicity of this species is also a potentially significant human health risk.

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Section: Distribution Of Blue-lined Octopus On the Korean Coastsupporting

confidence: 76%

Section: Distribution Of Blue-lined Octopus On the Korean Coastmentioning

confidence: 83%

Tetrodotoxin and the Geographic Distribution of the Blue-Lined Octopus Hapalochlaena fasciata on the Korean Coast

Kim

Cho

et al. 2023

Toxins

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“…The blue-lined octopus Hapalochlaena cf. fasciata is a small octopus that has been reported to be distributed in Australia, Korea, and Japan [ 15 , 16 , 17 , 18 ]. The blue-ringed octopus contains TTX throughout the body, including the posterior salivary glands (PSGs), gonads, and arms, with the PSGs being the most highly toxic organ [ 15 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Tetrodotoxin Profiles in Xanthid Crab Atergatis floridus and Blue-Lined Octopus Hapalochlaena cf. fasciata from the Same Site in Nagasaki, Japan

Zhang

Yamate

Takegaki

et al. 2023

Toxins

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The xanhid crab Atergatis floridus and the blue-lined octopus Hapalochlaena cf. fasciata have long been known as TTX-bearing organisms. It has been speculated that the TTX possessed by both organisms is exogenously toxic through the food chain, since they are reported to have geographic and individual differences. The source and supply chain of TTX for both of these organisms, however, remain unclear. On the other hand, since crabs are one of the preferred prey of octopuses, we focused our attention on the relationship between the two species living in the same site. The aim of this study was to determine TTX concentrations and TTX profiles of A. floridus and H. cf. fasciata, collected simultaneously in the same site, and examine the relationship between them. Although there were individual differences in the TTX concentration in both A. floridus and H. cf. fasciata, the toxin components commonly contained 11-norTTX-6(S)-ol in addition to TTX as the major components, with 4-epiTTX, 11-deoxyTTX, and 4,9-anhydroTTX as the minor components. The results suggest that octopuses and crabs in this site acquire TTX from common prey, including TTX-producing bacteria and/or may have a predator–prey relationship.

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Hapalochlaena lunulata, greater blue-ringed octopus

Williams,

Caldwell

2024

Octopus Biology and Ecology

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Distribution, body size and maturation pattern of the blue-lined octopus <i>Hapalochlaena</i> cf <i>fasciata</i> in Japan

Cited by 3 publications

References 12 publications

Tetrodotoxin and the Geographic Distribution of the Blue-Lined Octopus Hapalochlaena fasciata on the Korean Coast

Tetrodotoxin and the Geographic Distribution of the Blue-Lined Octopus Hapalochlaena fasciata on the Korean Coast

Tetrodotoxin Profiles in Xanthid Crab Atergatis floridus and Blue-Lined Octopus Hapalochlaena cf. fasciata from the Same Site in Nagasaki, Japan

Hapalochlaena lunulata, greater blue-ringed octopus

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