This study examines the distribution and taxonomy of sea horses in South Korea, specifically sea horses that were caught in the Southern Sea, centering on Yeosu, South Korea. Specimen collection methods The samples were collected by set net, skimming nets, dragnets, and landing nets on a boat, as we...
This study examines the distribution and taxonomy of sea horses in South Korea, specifically sea horses that were caught in the Southern Sea, centering on Yeosu, South Korea. Specimen collection methods The samples were collected by set net, skimming nets, dragnets, and landing nets on a boat, as well as scuba diving. A total of 128 sea horses belonging to three species were collected. To investigate the exact distribution pattern, the catch per unit effort and the population density per $1,000m^2$ were calculated for each site in the Southern Sea. The result shows the highest catch by set nets was 29 sea horses a day in Site B at Dolsan-eup, Port Impo, and the highest catch by scuba diving was 8 sea horses a day in Site B at Gijang-gun, Busan. The highest population density was 61.2 sea horses in the coast of Gijang-gun, Busan. Genetic information analysis and morphological analysis were performed for determination of species. As a result, four Hippocampus trimaculatus, (flat-faced sea horses), 45 Hippocampus coronatus (Crowned sea horses), and 79 Hippocampus mohnikei (Japanese sea horses) were distinguished.
This study examines the distribution and taxonomy of sea horses in South Korea, specifically sea horses that were caught in the Southern Sea, centering on Yeosu, South Korea. Specimen collection methods The samples were collected by set net, skimming nets, dragnets, and landing nets on a boat, as well as scuba diving. A total of 128 sea horses belonging to three species were collected. To investigate the exact distribution pattern, the catch per unit effort and the population density per $1,000m^2$ were calculated for each site in the Southern Sea. The result shows the highest catch by set nets was 29 sea horses a day in Site B at Dolsan-eup, Port Impo, and the highest catch by scuba diving was 8 sea horses a day in Site B at Gijang-gun, Busan. The highest population density was 61.2 sea horses in the coast of Gijang-gun, Busan. Genetic information analysis and morphological analysis were performed for determination of species. As a result, four Hippocampus trimaculatus, (flat-faced sea horses), 45 Hippocampus coronatus (Crowned sea horses), and 79 Hippocampus mohnikei (Japanese sea horses) were distinguished.
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문제 정의
It seems that there is an urgent need for investigating the distribution and taxonomy of sea horses inhabiting the Southern Sea of South Korea in order to keep track of the sea horse population in South Korea. Therefore, this study was conducted to obtain basic data for sea horses in the Southern Sea of South Korea as a basis for a series of forthcoming research. Through morphological and genetic analyses, this study strives to understand the domestic distribution of South Korean sea horses that have been designated as protected animals and arerapidly decreasing in number around the world.
This study seeks to investigate the current status of sea horses in South Korea to help preservation efforts of sea horses, which are rapidly decreasing in number around the globe. To obtain data for sea horses in South Korea, sea horses were captured in the Southern Sea, and their distribution, morphology, and genetic characteristics were analyzed.
제안 방법
When the captured sea horses were counted by location, the highest number of sea horses were found to have been caught in sites A and B, where 85 sea horses belonging to three species were caught. For a more accurate examination of the distribution pattern, the population density and CPUE were calculated. The CPUE was analyzed by catching method because different environments required different catching methods.
This study seeks to investigate the current status of sea horses in South Korea to help preservation efforts of sea horses, which are rapidly decreasing in number around the globe. To obtain data for sea horses in South Korea, sea horses were captured in the Southern Sea, and their distribution, morphology, and genetic characteristics were analyzed. sea horses were collected over 20 incidents in five months, between July 8 and November 16, 2015, around Yeosu using set nets, skimming nets, dragnets, landing nets, and scuba diving.
대상 데이터
Sea horses were caught 20 times between July 8 and November 16, 2014 in the Southern Sea, South Korea, including Yeosu in Jeollanam-do area. A total of 128 sea horses belonging to three species were collected, consisting of 4 flat-faced sea horses (Hippocampus trimaculatus), 45 crowned sea horses (Hippocampus coronatus), and 79 Japanese sea horses (Hippocampus mohnikei). The Japanese sea horses and flat-faced sea horses were mostly caught with set nets, while the crowned sea horses were caught with scuba diving and skimming nets in the coasts.
To ensure safety in transporting and to reduce travel time and distance, the investigation was centralized to the shores near Yeosu, where the researchers’ facility (Hanwha Aquaplanet, Yeosu) is located. Eight sites for specimen collection were selected, including Port Impo in Dolsan-eup; Samseom Village in Anpo-ri, Hwayang-myeon; Nam-myeon, Ando-ri; Gijang-gun, Busan; and Sangju Beach in Namhae-do. The selected locations, their GPS coordinates, and satellite images are provided in [Table 1].
For definite classification, 11 sea horses belonging to three species were sent to the Fish Laboratory of the Marine Biology Department of Pukyong National University. The captured sea horses were classified as Morphological Analysis and Genetic Analysis.
Sea horses were caught 20 times between July 8 and November 16, 2014 in the Southern Sea, South Korea, including Yeosu in Jeollanam-do area. A total of 128 sea horses belonging to three species were collected, consisting of 4 flat-faced sea horses (Hippocampus trimaculatus), 45 crowned sea horses (Hippocampus coronatus), and 79 Japanese sea horses (Hippocampus mohnikei).
The material and thickness of the structures were selected to allow the sea horses to wrap their tails around the structures, and artificial aquatic plants and 5×5 mm meshes were used for the structures.
To ensure safety in transporting and to reduce travel time and distance, the investigation was centralized to the shores near Yeosu, where the researchers’ facility (Hanwha Aquaplanet, Yeosu) is located.
성능/효과
sea horses were collected over 20 incidents in five months, between July 8 and November 16, 2015, around Yeosu using set nets, skimming nets, dragnets, landing nets, and scuba diving. As a result, 128 sea horses belonging to three species were captured, consisting of 4 Hippocampus trimaculatus, 45 Hippocampus coronatus, and 79 Hippocampus mohnikei. In the deep seas of 20 m deep or deeper, mostly H.
As a result, the 11 captured sea horses were found to be 6 H. coronatus, 2 H. trimaculatus, and 3 H. mohnikei. In [Fig.
The genetic analysis results for the 11 sea horses revealed that they belonged to three species: c1-5 were H. coronatus, t1-2 were H. trimaculatus, and m1-3 were H. mohnikei.
후속연구
coronatus. Considering that three species were captured in the coasts of Yeosu, more intensive research in more diverse areas and water depths will be necessary based on the results of this study.
In the future, the characteristics of sea horses based on preferred habitats need to be explored in other coastal regions of South Korea according to the water environments. Such further study is hoped to help reveal the distribution patterns of sea horses in South Korea and their morphological characteristics.
Therefore, this study was conducted to obtain basic data for sea horses in the Southern Sea of South Korea as a basis for a series of forthcoming research. Through morphological and genetic analyses, this study strives to understand the domestic distribution of South Korean sea horses that have been designated as protected animals and arerapidly decreasing in number around the world.
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