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Economic benefits and management implications of reducing the harvest of juvenile mackerel in Korea

  • LEE, Jungsam;KIM, Dae-Young;SEO, Young-Il;KIM, Do-Hoon
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.52 no.4
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    • pp.386-393
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    • 2016
  • It is essential to provide good environment for juvenile fish to grow and spawn in order to keep reproduction mechanism of fisheries resources. However, harvesting juvenile fish deprives adult fish of the opportunity to reproduce, thereby changing self-regulating renewable resources into non-renewable ones and preventing sustainable harvesting as well as reducing fishers' income. We reviewed the catch status of Korea on juvenile mackerel and analyzed how reducing the catch ratio of juvenile mackerel may affect the spawning stock and Korean fishermen's revenue. In addition, we analyzed the problem of caching juvenile mackerel in Korean fisheries and current efforts to protect and reduce the catch ratio of juvenile mackerel in Korea. Furthermore, we suggested future efforts to protect juvenile mackerel. The result of the study showed that reducing the catch ratio of juvenile mackerel from 44.4% to 30.0% would increase fishers' revenue by 60.6 billion KRW. We suggest the changing of purse seine fishery's catching methods from night operation to day operation, relocation of fishing vessels to move to other fishing grounds when fishing vessels meet high density of juvenile mackerel, and consumers' clever choice of consuming adult mackerel in order to accelerate the move toward protecting juvenile mackerel in Korea.

A Study on Janvenile Delinquents' View of Parental Attitudes (비행 청소년의 부모관 인식에 관한 일 연구)

  • 장선경
    • Journal of the Korean Home Economics Association
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    • v.27 no.4
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    • pp.123-137
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    • 1989
  • The purpose of this study is to examine parental attitudes perceived by juvenile delinquents and to provide the basic material on the problem of juvenile delinquency. For this purpose, this study examines 1) the relation-ship between the juvenile delinquents' social demographic characteristics and the juvenile delinquents' view of parental attitudes 2) the correlation between the juvenile delinquents' social demographic characteristics and the content and the motive of delinquency, 3) the content and the motive of delinquency in accordance with the juvenile delinquents' view of parental attitudes. For the subject of this study, 318 juvenile delinquents who were in the custody of the institution in An-Yang were selected, and questionnaire sheets were used. Of 318 questionnaire sheets, 221 sheets were analyzed by statistical methods, and the data were analyzed by frequency, percentage, average, t-test, x-test, and F-test; 1. There is a significant difference in the juvenile delinquents' view of their fathers in accordance with their fathers' age. Namely, the younger the father is, the more the juvenile delinquent wants his father to be less negative. There is a significant difference in the juvenile delinquents' view of their mothers according to the existence of step-sibling. Juveniles with step-siblings deny their mothers' inconsistent attitude more than the juveniles without a step-sibling. 2. The social demographic characteristics influencing the content of juvenile delinquency are juvenile's age, the degree of education, the father's age, the style of possessing house and the region of a dwelling. The motive of delinquency show a significant difference according to the juvenile's age. 3. According to the results of studying the correlation between the view of parental attitudes and the content and the motive of delinquency, there is a significant difference in the father's protective attitude, and the content of delinquency as well as in the mother's positive denial, her rigid control, her inconsistent attitude and the content of delinquency. The subordinate domains are opposite to the traditional conception that the father is stern and the mother is peronssive. Today our society encourages the parents' equal and democratic attitude toward their children and the juvenile's view of parental attitudes is discordant with the reality. The juvenile delinquents' view of parental attitudes reflects the equalitariansim of the contemporary society but is influenced by the traditional view of the parents.

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Physiological Character of Juvenility in Higher Plant (고등식물체에서 유년기의 생리적 특성)

  • 양덕조
    • Proceedings of the Botanical Society of Korea Conference
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    • pp.191-211
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    • 1987
  • Common usage of the concept of juvenility implies that there is one physiological phase, the juvenile phase, which manifests itself in the various morphological and physiological phenomena observed in juvenile higher plants. The juvenile phase is often defined as that time from seed germination until the plant attains the ability to flower regulating such behaviour. This definition precludes plants from flowering in the juvenile phase. It is of major interest, therefore, to identify the physiological controls(Bluehreife) regulating such behavior. The length of the juvenile period in higher plants ranges from one year to over 60 years in different species. The long juvenile period of seedling is the main cause of the long duration of the breeding process. I determined the length of the juvenile period in various plants and its control of phase changes in natural system in relation to factors such as plant size and age, shoot morphology, apex size, root system and phytohormonal and nutritional status is reviewed. From the own experimental and observational evidence available it appears that both hormonal and nutritional factors can be involved in control of juvenility but that a specific juvenile or flowering hormone is not involved. Grafting, ringing, scoring, root pruning and fertilization have been used to accelerate flowering, but in most cases these cultured treatments are only successful on plants that were passed the juvenile phase. It is suggested that there are intrinsic difference between the meristematic cells of the apieces of juvenile and adult shoot, which are thus determined with respect to there development potentialities. The problems associated with the maintenance of the determined state through mitosis are discussed. The properties of transitional forms of Ribes nigrum L. intermediate between the juvenile and adult phase, are descrived and there implications discussed. Analogies are drawn between juvenile phenomena in woody perennials and in herbaceous species.

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The effect of Group art therapy with ceramics on aggression and impulse of juvenile delinquent

  • Nah, Eun Jeong;Ryu, Jung Mi
    • Journal of the Korea Society of Computer and Information
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    • v.21 no.8
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    • pp.85-94
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    • 2016
  • The purpose of this research is to clarify the effect that group art therapy with ceramics affects aggression and impulse for juvenile delinquent. The experimental domain of this study was implemented with 24 juvenile delinquent suspended from protective dispositions for them who were in long-term juvenile sheltered housing about for 12 years. These subjects were selected from among juvenile delinquent between 14 to 20 years age who were entrusted from court to the Juvenile Protection Education Institute located in G area. 12 people were randomly assigned each experimental domain and control domain; experimental group was implemented group art therapy with ceramics whereas there was anything to control group. The program was designed once a week and 90minutes each 12 sessions. The result of this study show that control group at variable related aggression was not significantly changed at posttest. In case of experimental group, here was significantly changed as a whole, also sub factor such as physical aggression showed considerable change so that the first hypothesis was supported In addition, experimental group showed the considerable change at sub factor of motor impulsiveness so that the second hypothesis was supported whereas control group at impulse variable was not significantly changed during pretest and posttest. This study results conclude that the juvenile delinquent participating group art therapy with ceramics represents the effect on reduction of aggression and motor impulsiveness. We expect this result will be used as further base line data for juvenile delinquent.

The Case Study on the Creation and the Use of the Bibliotherapy Program for the Correctional Education of Juvenile Delinquents: Focus on the Juvenile Correctional School at P City (비행 청소년 교정교육을 위한 독서치료 프로그램 개발 및 적용 사례 연구 - P소년원을 중심으로 -)

  • Kim, Soo-Kyoung
    • Journal of Korean Library and Information Science Society
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    • v.41 no.2
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    • pp.27-60
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    • 2010
  • The purpose of this study is to discuss about problems exposed as operating of bibliotherapy program and to find way to vitalize bibliotherapy as a correctional education for juvenile delinquents. The institutionalized youths of juvenile correctional school at P city which have been chosen as the sample representatives for planning, implementing, accessing and analyzing this program. The analysed results of the program show that points are to be considered: (1) Priority should be given to self-motivated youths when selecting participants. (2) Setting up as a regular program at juvenile correctional school. (3) To be necessary active participation, individual program should be provided in abreast of group program. (4) Creating adequate environment in other to ensure continuous self-healing for bibliotherapy (5) To create of professional bibliotherapy programs specialized for juvenile delinquents (6) Bases for Cooperation between the Ministry of Justice and The National Central Library, and between local juvenile corrective institutions and local libraries (7) Ultimately, To found a library at juvenile correctional schools.

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A Study on the Comparative Analysis of Brassiere Pattern between Girl Students and Adults (청소년 여학생(靑少年 女學生)과 성인 여성(成人 女性)의 브래지어 패턴 비교연구(比較硏究))

  • Sohn, Hee-Soon;Cha, Su-Joung
    • Journal of Fashion Business
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    • v.10 no.4
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    • pp.95-113
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    • 2006
  • This study was conducted comparative analysis of juvenile brassiere and adult brassiere to identify the problems of brassieres on the market. The raw data for this study was processed by SPSS 10.1 version(statistical software) and the results of this study can be summarized as follows. 1) The result of comparative analysis of juvenile brassiere and adult brassiere pattern is that each pattern showed no difference. 2) The results of the comparative analysis of juvenile and adult brassiere pattern in wing's length and angle is that even though there are some difference between juvenile and adult in side line inclination of brassiere. there is no setting difference but size of that brassiere. 3) The result of a comparative analysis pattern and cup size measurement of juvenile brassiere and adult brassiere is that even though the adult cup girth and angle is bigger than the juvenile because adults have more protrusive and bigger volume and well developed breast, some case rather the adult's cup angle is smaller than the juvenile as brand. And as we grow up to be a woman, difference of lower breast girth and breast girth are become big while difference of upper breast girth and breast girth are become small for that reason upper cup must be lower and lower cup must be higher but there is almost no difference between adult and juvenile. 4) The result of a comparative analysis of juvenile brassiere and adult brassiere bust point of the pattern is that adult brassiere's distance between bust points 6.12cm, and juvenile's 5.6cm, there are only 0.52cm difference between two products and just 0.4cm, size grading. These results are explained that even though when grow up to be a woman the distance between two bust points become to be long and breast toward out side but brassiere size don't vary with body characteristic.

A Case Report of Systemic Type Juvenile Idiopathic Arthritis with Night Fever (야간 발열을 동반하는 전신형(Systemic type) 소아기 류마티스 관절염(Juvenile Idiopathic Arthritis; JIA) 환아 증례보고)

  • Yoo, Chang-Kil;Lee, Yun-Ju
    • The Journal of Pediatrics of Korean Medicine
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    • v.24 no.3
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    • pp.68-75
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    • 2010
  • Objectives: This study is to report a case that has an effective result to systemic type juvenile idiopathic arthritis patient with an oriental medicine treatment. Methods: We treated the patient with an oriental medicine and tapered down with the western medicine. We followed up the laboratory blood tests every two or three months and through telephone at least six days in a week. Results: The symptoms of systemic type juvenile idiopathic arthritis were vanished and the patient maintains his condition with oriental medicine treatment after discontinued all Disease-Modifying Antirheumatic Drugs(DMARDs). His ESR, CRP levels and other blood test results were back to normal range. Now he is in clinical remission status. Conclusions: According to the result, the oriental medicine treatment is considered to be effective on the systemic juvenile idiopathic arthritis and further studies will be needed with more cases.

Factors Influencing to the Quality of Life of the Juvenile Delinquents in the Juvenile Justice Process (사법처리과정 청소년의 삶의 질에 영향을 미치는 요인)

  • Nam, Mi-Ahe
    • Korean Journal of Social Welfare
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    • v.58 no.1
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    • pp.265-290
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    • 2006
  • The purposes of this study are: First, to investigate how the juvenile delinquents in the juvenile justice process evaluate their quality of life. Second, to examining which factors influence their quality of life. To accomplish these purposes, this study used sample of 570 juvenile delinquents in Seoul, Busan, Daejeon who are in the process of the juvenile justice and used the Korean Version of WHOQOL-BREF (brief version of WHO quality of life measure). To examine this purpose, Mean, standard deviation, t-test, One way ANOVA, multiple regression were conducted. The results are as follows: 1) juvenile delinquent in the process of the juvenile justice have complex problems and needs, and their quality of life are lower than the civil in the psychological, social relations, environment domain. 2) The factors influencing their quality of life in the general domain are stigma by parent, violent, undemocratic treatment in the process of the juvenile justice, family income level. But the factors of each domain of quality of life differ to some extent. Statistically significant factors of physical health domain are violent, undemocratic treatment in the process of the juvenile justice, first arrest time, stigma by others, sex, juvenile justice process. Significant factors of psychological health domain are delinquency frequency, stigma by parent, stigma by others, first arrest time, family income level, sex. Significant factors of social relations domain are first arrest time, stigma by parent, delinquency frequency, family income level, stigma by friend. Environment is significantly influenced by family income level, stigma by parent, sex, delinquency frequency, juvenile justice process.

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Effect of Juvenile Fish Predation on the Zooplankton Community in the Large Regulated Nakdong River, South Korea (저수지화 성향을 띤 낙동강에서 치어 섭식이 동물플랑크톤 군집에 미치는 영향)

  • Chang, Kwang-Hyeon;Hwang, Soon-Jin;Jang, Min-Ho;Kim, Hyun-Woo;Jeong, Kwang-Seuk;Joo, Gea-Jae
    • Korean Journal of Ecology and Environment
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    • v.34 no.4
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    • pp.310-318
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    • 2001
  • In the large regulated Nakdong River, the Predation effect of juvenile fish on the zooplankton community was evaluated by gut and stomach analyses of fish in 1999. Juvenile fish of five species showed high density from May to early June when river discharge was low and water body became stagnant. During this period, large rotifers, Asplanchna spp. and Brachionus spp. declined and the decrease of cladoceran (Moina micrura and Bosminopsis deitersi) density was also obeserved. At this time, small rotifers including Polyarthra spp. reached maximum density. Gut analysis of fish demonstrated that small-sized juvenile fish (< 15 mm in total length)preferred large rotifers as well as cladocerans, while large sized fish (> 15 mm)selected only cladocerans. On the other hand, juvenile Micropterus salmoides of which size was larger than other juvenile fish consumed not only zooplankton but also other small juvenile fish. Based on these results, the decline of large rotifers and cladocerans during early summer in the river seems to be result of predation by juvenile fish. However, the period when juvenile fish maintained their high density was as short as one month and the decreased density of cladocera rapidly recovered as soon as juvenile fish became scarce. Such a short period of juvenile fish devel-opment in the river can be attributed to the consumption of juvenile fish by the young-of-the-year cohorts as well as adults of M. salmoides. The high trophic state of the river might permit the rapid recovery of the cladoceran community. The predation impact of juvenile fish in the Nakdong River seems to be affected by the existence of piscivore as well as high trophic status.

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