Reproduction of the jack mackerel, Trachurus japonicus Temminck et Schlegel in the coastal waters around Jeju Island, Korea: Maturation and spawning

Kee, Hyung; Lee, Jae Bong; Sukyung, Kang; Chang, Dae Soo; Choi, Jung Hwa

doi:10.3796/ksft.2009.45.4.243

Cited by 14 publications

(5 citation statements)

References 2 publications

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“…18% , (Scomber japonicus), (Trachurus japonicus), (Sardinops melanosticus), (Scomberomorus niphonius) (Lee and Kim, 2011 , 2010). (Ann, 1973;Sohn, 1993), (Cha et al, 2009), (Shin, 1981), (Huh and Cha, 1998), , (Kim, 1970), (Cho, 1981), (Kim et al, 2010) . (2 ) (Fig.…”

Section: 서 론mentioning

confidence: 99%

Age and Growth of Jack Mackerel Trachurus japonicus off Jeju Island, Korea

Lee¹,

Sukyung²,

Jung³

et al. 2016

Korean Journal of Fisheries and Aquatic Sciences

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The age and growth of jack mackerel Trachurus japonicus caught by large purse seine fishery were studied during August 2004 and May 2005. Otoliths of 472 fish were observed under reflected light, and translucent zones made on the post-rostrum axis were regarded as annual marks. Monthly changes in the marginal index indicated that the translucent zone was formed once a year, mainly in March-April, which was coincident with the peak spawning time of jack mackerel. The estimated ages were 0-6 years, corresponding to a fork length (FL) range of 13 to 38 cm. Most obtained individuals were 2-year-old fish, followed by 1-year-old fish. The mean fork length at age from otolith reading (sex combined) was applied to the von Bertalanffy equation and growth parameters were estimated: L ∞ = 38.29 cm FL, k = 0.31 years -1 , t 0 = -0.81 years.

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Section: 서 론mentioning

confidence: 99%

Age and Growth of Jack Mackerel Trachurus japonicus off Jeju Island, Korea

Lee¹,

Sukyung²,

Jung³

et al. 2016

Korean Journal of Fisheries and Aquatic Sciences

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“…In haul03, Japanese jack mackerel was the predominantly recorded species with an estimated population of 1149 ind./km 3 (94.5%). In this regard, we believe that the collected mackerel had gathered for spawning, as Japanese jack mackerel inhabit depths of between 10 and 100 m [24] and the main spawning season of these mackerel in the seas around Jeju extends from March to July [25]. However, given that 50% of Japanese jack mackerel females are known to have a mature body length of 26.6 cm [25], it is considered that not all Japanese jack mackerel collected at this time were engaged in spawning.…”

Section: Discussionmentioning

confidence: 99%

A Comparative Assessment of Mid-Water Trawl and Deep Vision for Investigating Fishery Resources in the Coastal Waters off Jeju Island, Korea

Lee

Yoon

et al. 2022

Applied Sciences

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Acoustic-trawl surveys use trawl sampling to identify aquatic species. The Deep Vision stereo camera system collects images of fish passing through trawl extensions. We conducted a survey using Deep Vision with a mid-water trawl to identify and measure the lengths of domestic fish species in October 2020 and July 2021 in coastal waters off Jeju Island, Korea. We identified 86.4% of 22 species captured from images and estimated the lengths of 40% of the identified fish. A comparison of species numbers identified by mid-water trawl and Deep Vision revealed that, with the exception of three species with fewer than five individuals, identification was consistent. Our results indicate that the combined use of Deep Vision and mid-water trawl can be an eco-friendly and effective approach of examining the spatial distribution and size of fish species.

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“…japonicus and Tr. japonicus [65,66]. Those same species are also abundant at adjacent near-coastal waters of southeastern Korea during the spring and summer [56,67].…”

Section: Discussionmentioning

confidence: 99%

Fish Assemblage Structure Comparison between Freshwater and Estuarine Habitats in the Lower Nakdong River, South Korea

Park

Riedel²,

et al. 2020

JMSE

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Variabilities of biological communities in lower reaches of urban river systems are highly influenced by artificial constructions, alterations of flow regimes and episodic weather events. Impacts of estuary weirs on fish assemblages are particularly distinct because the weirs are disturbed in linking between freshwater and estuarine fish communities, and migration successes for regional fish fauna. This study conducted fish sampling at the lower reaches of the Nakdong River to assess spatio-temporal variations in fish assemblages, and effects of estuary weir on structuring fish assemblage between freshwater and estuary habitats. In total, 20,386 specimens comprising 78 species and 41 families were collected. The numerical dominant fish species were Tachysurus nitidus (48.8% in total abundance), Hemibarbus labeo (10.7%) and Chanodichthys erythropterus (3.6%) in the freshwater region, and Engraulis japonicus (10.0%), Nuchequula nuchalis (7.7%) and Clupea pallasii (5.2%) in the estuarine site. The fish sampled were primarily small species or the juveniles of larger species at the estuary region, while all life stages of fishes were observed at the freshwater habitats. The diversity patterns of fish assemblages varied greatly according to study site and season, with higher trends at estuarine sites during the warm-rainy season. No significant difference in diversity between freshwater and estuarine sites during the cold-dry season were found. Multivariate analyses of fish assemblage showed spatial and seasonal differences of assemblage structures. Higher effects of between-site variability but not within seasonal variability at each site were observed. Variations in assemblage structures were due to different contributions of dominant species in each habitat. Common freshwater species characterized the fish assemblage in the freshwater region, while marine juveniles were significantly associated with the estuarine habitat. The results from the ecological guild analyses showed distinct ecological roles for freshwater and marine species, and overlapping roles for fish sampled at the fishways. The lower reaches of the Nakdong River are an important ecosystem for both freshwater and marine juveniles. Nakdong River estuarine residents and migrant fishes, however, have been negatively affected by the construction of the weir (gravity dam), due to the obstruction to migration from and to freshwater habitats. Conservation and management policies aimed at minimizing anthropogenic influences on estuary ecosystems should focus on evaluating ecological functions of estuary weirs.

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Reproduction of the jack mackerel, Trachurus japonicus Temminck et Schlegel in the coastal waters around Jeju Island, Korea: Maturation and spawning

Cited by 14 publications

References 2 publications

Age and Growth of Jack Mackerel Trachurus japonicus off Jeju Island, Korea

Age and Growth of Jack Mackerel Trachurus japonicus off Jeju Island, Korea

A Comparative Assessment of Mid-Water Trawl and Deep Vision for Investigating Fishery Resources in the Coastal Waters off Jeju Island, Korea

Fish Assemblage Structure Comparison between Freshwater and Estuarine Habitats in the Lower Nakdong River, South Korea

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