Predation differences between wild and hatchery-reared tiger puffer Takifugu rubripes juveniles in a salt pond mesocosm

Shimizu, Daisuke; Sakiyama, Kazutaka; Sakakura, Yoshitaka; Takatani, Tomohiro; Takahashi, Yuichiro

doi:10.2331/suisan.73.461

Cited by 12 publications

(34 citation statements)

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“…Therefore, we also compared swimming depths of wild and hatchery-reared juveniles immediately after release into a smallscale experimental tank (33.5 cm deep). Additionally, because the tiger puffer is known to have a characteristic of benthic dwelling, we observed post-release behavior of hatchery-reared juveniles that had been acclimated in a tank with a sandcovered bottom for 7 days (conditioned, Shimizu et al, 2007). Wild juveniles swam around the bottom and often showed bottom-dwelling behavior, but hatchery-reared juveniles swam mostly in the water column.…”

Section: Further Comparison Of Hatchery-reared and Wild Juvenilesmentioning

confidence: 99%

“…Data show the average frequency (%) of fish observed at the following depths: the open column shows data for the surface area (0 cm to 10.5 cm in depth), the shaded column shows data for the middle area (10.5 cm to 21.5 cm), and the closed column shows data for the bottom area (21.5 cm to 33.5 cm). Numbers in parentheses denote replicates; alphabet letters indicate statistical significance (a > b, Fisher's PLSD test, p < 0.05) (redrawn from Shimizu et al, 2007). reviews in fisheries science vol. 16 nos.…”

Section: Figurementioning

confidence: 99%

“…Therefore, three release trials (II-IV) were performed to compare the post-release mortality of hatchery-reared and wild juveniles in the pond during 2003-2005. These trials were conducted both in the presence and absence of predators (Table 2; Shimizu et al, 2007). We marked all fish using VIE tags to facilitate discrimination of wild and hatchery-reared juveniles ( Figure 2).…”

Section: Comparison Of Wild and Hatchery-reared Juveniles Stocked Intmentioning

confidence: 99%

“…This article reviews mainly two articles (Shimizu et al, 2006(Shimizu et al, , 2007 that describe development of tiger puffer, Takifugu rubripes, release technology using a mesocosm. We discuss the This pond experiences tidal seawater exchange using the range of the tides.…”

Section: Introductionmentioning

confidence: 99%

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Quantitative Evaluation of Post-Release Mortality Using Salt Pond Mesocosms: Case Studies of Hatchery and Wild Juvenile Tiger Puffer

Shimizu¹,

Sakiyama

Sakakura

et al. 2008

Reviews in Fisheries Science

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Quantitative approaches in release trials are typically used to evaluate fish quality for release. However, release trials under natural conditions include masking factors in their experimental designs. To streamline the experimental design of release, we used a semi-natural environment: a salt pond mesocosm (5,300 m 2 ). This article reviews recent findings related to comparison of post-release mortality, behavior, and physiological conditions between wild and hatchery-reared juveniles of the tiger puffer (Takifugu rubripes), which were released into the mesocosm with or without predators (sea bass, Lateolabrax sp.). Results of release trials in the mesocosm suggested that hatchery-reared juveniles were more easily preyed upon than wild juveniles, and that predation occurred shortly after release, decreasing thereafter. Results revealed differences in swimming depth after release and different accumulations of tetrodotoxin (TTX) in reared and wild fish. Predation shortly after release and behavioral defects in hatchery-reared juveniles, such as changes in swimming behavior and feeding behavior, might be the main causes of mortality in this species' stock enhancement programs.

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Section: Further Comparison Of Hatchery-reared and Wild Juvenilesmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Section: Comparison Of Wild and Hatchery-reared Juveniles Stocked Intmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Quantitative Evaluation of Post-Release Mortality Using Salt Pond Mesocosms: Case Studies of Hatchery and Wild Juvenile Tiger Puffer

Shimizu¹,

Sakiyama

Sakakura

et al. 2008

Reviews in Fisheries Science

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“…Non-toxic hatchery-reared juveniles of T. rubripes, in comparison with toxic wild juveniles, are affected by predation more easily (Shimizu et al 2006(Shimizu et al , 2007. This could be due to the difference in their swimming behavior and/or presence/absence of TTX.…”

Section: -3 Other Functionsmentioning

confidence: 99%

Toxins of Pufferfish—Distribution, Accumulation　Mechanism, and Physiologic Functions

Arakawa¹,

Takatani²,

Taniyama³

et al. 2017

Aqua-BioSci. Monogr. (ABSM)

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Keywordsunit) is defined as the amount of toxin required to kill a 20-g male mouse within 30 min after intraperitoneal administration], and the minimum lethal dose (MLD) for humans is estimated to be approximately 10000 MU (ª2 mg) (Noguchi and Ebesu 2001).The main symptoms of human intoxication include numbness of lips, tongue and the limbs, paresthesia, dysarthria, respiratory distress, and death is caused by respiratory failure in the most critical cases (Noguchi and Ebesu 2001). According to Toda et al. (2012), 651 incidents of TTX poisoning due to pufferfish have occurred in Japan, involving 976 patients and 56 deaths during the 22 years from 1989 to 2010. Many cases occurred during the winter season in coastal prefectures of the Seto Inland Sea, with "komonfugu" Takifugu poecilonotus, "mafugu" Takifugu porphyreus, "higanfugu" Takifugu pardalis, "shosaifugu" Takifugu Abstract Our many years of studies have provided a lot of information regarding distribution, accumulation mechanism, and physiologic functions of the natural toxins harbored by pufferfish. We detected tetrodotoxin (TTX) and/or its derivatives in several species of aquatic organisms including marine bacteria. This, along with the fact that pufferfish became non-toxic when they were reared with non-toxic feed, indicated that the toxification of pufferfish is of exogenous origin. Subsequently, we revealed by various TTX administration experiments using non-toxic cultured pufferfish that the TTX administered into the muscle or digestive tract rapidly transferred to the liver and skin, and that the toxin transfer to the gonads was largely different between male and female, suggesting the involvement of maturation in the internal kinetics of TTX. On the other hand, we visualized micro-distribution of TTX in the tissues of various TTX-bearing organisms using an immunohistochemical technique, giving a crucial insight to elucidate physiologic functions of TTX including the function as a defensive or offensive agent. Furthermore, we found that Southeast Asian freshwater pufferfish possess paralytic shellfish poison (PSP) as a main toxin, and that boxfish and Bangladeshi freshwater pufferfish bear a palytoxin (PLTX)-like toxin, and cause a rhabdomyolysis, which overturned the common sense that pufferfish toxin equals TTX.

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Administration of tetrodotoxin protects artificially raised juvenile tiger puffer Takifugu rubripes from predators

et al. 2016

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We examined the effects of tetrodotoxin (TTX) administration to the artificially-raised tiger puffer Takifugu rubripes juveniles on the survival after release into a mesocosm with predators in order to clarify the ecological significance of TTX. Artificial pellets containing 3 different concentrations of TTX (0 as control, 7, 14 MU/g•diet) were fed to non-toxic artificially-raised T. rubripes juveniles for 10 days. TTX accumulation in the various tissues of fish was detected except for control diet group, and TTX administration did not affect survival or growth of the fish. Then, a hundred fish from each diet group were released together into a salt-pond mesocosm (2,650 m 2) with predators (Lateolabrax sp.) for 5 days. Survival after release was significantly higher in the fish fed with TTX both 7 MU/g•diet (62 %) and 14 MU/g•diet (74 %) than the control fish (32 %).

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Predation differences between wild and hatchery-reared tiger puffer Takifugu rubripes juveniles in a salt pond mesocosm

Cited by 12 publications

References 12 publications

Quantitative Evaluation of Post-Release Mortality Using Salt Pond Mesocosms: Case Studies of Hatchery and Wild Juvenile Tiger Puffer

Quantitative Evaluation of Post-Release Mortality Using Salt Pond Mesocosms: Case Studies of Hatchery and Wild Juvenile Tiger Puffer

Toxins of Pufferfish—Distribution, Accumulation　Mechanism, and Physiologic Functions

Administration of tetrodotoxin protects artificially raised juvenile tiger puffer Takifugu rubripes from predators

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Predation differences between wild and hatchery-reared tiger puffer Takifugu rubripes juveniles in a salt pond mesocosm

Cited by 12 publications

References 12 publications

Quantitative Evaluation of Post-Release Mortality Using Salt Pond Mesocosms: Case Studies of Hatchery and Wild Juvenile Tiger Puffer

Quantitative Evaluation of Post-Release Mortality Using Salt Pond Mesocosms: Case Studies of Hatchery and Wild Juvenile Tiger Puffer

Toxins of Pufferfish—Distribution, Accumulation Mechanism, and Physiologic Functions

Administration of tetrodotoxin protects artificially raised juvenile tiger puffer Takifugu rubripes from predators

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Toxins of Pufferfish—Distribution, Accumulation　Mechanism, and Physiologic Functions