Maturity and Spawning of the Marbled Flounder Pseudopleuronectes yokohamae off the Coast of Pohang, East Sea

Kim, So Ra; Kee, Hyung; Lee, Jae Bong; Lee, Hae Won; Yang, Jae Hyeong; Baek, Hea Ja; Kim, Sung Tae

doi:10.5657/kfas.2016.0367

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…In the present study, MMP of 1-year cryopreserved sperm using extender-1 combined with 15% Me 2 SO or 12% GLY showed a significant value similar to MMP values of 7-day cryopreserved sperm and those of fresh sperm. Kim et al ( 2016 ) reported the effects of long-term (3-year) cryopreservation on MMP of seven-band grouper. However, the present study demonstrated that post-thaw motility of cryopreserved sperm was similar to that of fresh sperm, which could explain the absence of difference in MMP between fresh and sperm cryopreserved (7 days and 1 year) using extender-1 + 15% Me 2 SO or extender-1 + 12% GLY.…”

Section: Discussionmentioning

confidence: 99%

“…Although aquaculture technology for this species has been developed in Japan (Lucas et al, 2019 ), it has not been reported from other countries yet. Gonadal maturity occurs earlier in males than in females of this species (Kim et al, 2016 ), making its hatchery production difficult. Cryopreserved sperm can solve this problem by supplying sperm during hatchery production (Hassan et al, 2017 ; Gheller et al, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

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Vital Analysis of Cryopreserved Sperm of Marbled Flounder, Pseudopleuronectes yokohamae

et al. 2021

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The marbled flounder (Pseudopleuronectes yokohamae) is a commercial flatfish in East Asia. The aim of this study was to improve its sperm cryopreservation protocol based on the vitality assessment of 7-day and 1-year cryopreserved sperm. Four extenders (extender-1: sucrose solution; extender-2: glucose solution; extender-3: fish Ringer's solution; and extender-4: modified fish Ringer's solution) were tested with a combination of five cryoprotectants (CPAs) (dimethyl sulfoxide: Me2SO; glycerol: GLY; ethylene glycol: EG; propylene glycol: PG; and methanol: MeOH) at four different concentrations (5, 10, 12, and 15%). Fluorescent technique was applied to detect the plasma membrane integrity (PMI), mitochondrial membrane potential (MMP), and DNA integrity of fresh and cryopreserved sperm specimens. Fresh sperm was diluted at a ratio of 1:2 (sperm:extender). Post-thaw motility of sperm cryopreserved using 15% Me2SO along with either extender-1 (86.0 ± 5.2%) or extender-2 (85.7 ± 7.1%) was similar (p > 0.05) to that of fresh sperm. Sperm cryopreserved using 12% GLY combined with extender-1 (83.67 ± 6.7%) or extender-2 (83.3 ± 4.7%) showed a similar motility to those cryopreserved with 15% Me2SO, but significantly lower from fresh sperm. The type of straw (0.25 or 0.50 mL) did not show any significant difference (p > 0.05) in post-thaw sperm motility. The highest values of PMI and MMP were observed for 7-day cryopreserved sperm using extender-1 in combination with 15% Me2SO (91.0 ± 2.9% and 90.0 ± 2.0%, respectively) or 12% GLY (90.0 ± 1.3% and 90.0 ± 4.6%, respectively). These results were similar to those of fresh sperm (95.3 ± 2.1% and 92.9 ± 2.5%, respectively). PMI and MMP of 1-year cryopreserved sperm using extender-1 in combination with 15% Me2SO (90.3 ± 2.5% and 89.3 ± 2.1%, respectively) or 12% GLY (90.0 ± 4.4% and 88.7 ± 2.2%, respectively) were significantly similar (p > 0.05) to those of fresh sperm. Sperm DNA integrity did not reveal any significant difference (p > 0.05) between fresh and cryopreserved (7-day and 1-year) sperm. Based on the assessed sperm vitality indicators, a cryopreservation protocol using extender-1 in combination with 15% Me2SO or 12% GLY has potential for hatchery as well as to create a germplasm bank.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Vital Analysis of Cryopreserved Sperm of Marbled Flounder, Pseudopleuronectes yokohamae

et al. 2021

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Optimal mesh size of traps for marbled flounder (Pseudopleuronectes yokohamae) based on biological and economic factors

Koo,

Kwon

2024

Fisheries Management Eco

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Gear selectivity is crucial in fisheries management because it influences the size and species of fish caught, with traditional methods often basing optimal mesh size on the mature length of a target species. However, to ensure sustainable fisheries, both biological aspects of resource protection and fishing operation efficiency must be considered. This study aimed to determine the ideal mesh size for trap fishing of marbled flounder (Pseudopleuronectes yokohamae) in Gyeongsangnam‐do, South Korea, by using biological and economic factors for sustainable fisheries management. We sampled fish caught in traps of varying mesh sizes (35, 50, 65, 80, and 100 mm) and developed two models based on fish maturity, bycatch ratio, and CPUE. Model 1 used a maturity criterion of 17.8 cm, and Model 2 used the legal minimum length limit of 20 cm. Net selectivity curves indicated that the optimal mesh size ranged 50–65 mm based only on a minimum mature body length of 17.8 cm. In contrast, the optimal mesh size based on both biological and economic factors ranged 57.5–90 mm. Our findings could guide policymakers in enhancing marble flounder population management strategies through policy adjustments in mesh size and gear restrictions.

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Maturity and spawning of the pointhead flounder, <i>Hippoglossoides pinetorum</i> in the coastal waters off Gangwon-do, East Sea

Yang¹,

Cho²,

Kim³

et al. 2018

J. Korean Soc. Fish. Technol.

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Maturity and Spawning of the Marbled Flounder Pseudopleuronectes yokohamae off the Coast of Pohang, East Sea

Abstract: Pleuronectes yokohamae , Pseudopleuronectes yokohamae (Ji et al., in press).

Cited by 3 publications

References 10 publications

Vital Analysis of Cryopreserved Sperm of Marbled Flounder, Pseudopleuronectes yokohamae

Vital Analysis of Cryopreserved Sperm of Marbled Flounder, Pseudopleuronectes yokohamae

Optimal mesh size of traps for marbled flounder (Pseudopleuronectes yokohamae) based on biological and economic factors

Maturity and spawning of the pointhead flounder, <i>Hippoglossoides pinetorum</i> in the coastal waters off Gangwon-do, East Sea

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