• 제목/요약/키워드: Mantle length

검색결과 56건 처리시간 0.022초

오징어, 꼴뚜기류의 성장 및 섭이율과 이료의 전환효율 (On the Growth, Feeding Rates and the Efficiency of Food Conversion for Cuttlefishes and Squids)

  • 최상
    • 한국동물학회지
    • /
    • 제9권2호
    • /
    • pp.12-20
    • /
    • 1966
  • Studies on the rate of growth, the rate of feeding and the efficiency of food conversion on the stage of new-born fries to the near adult size for three species of cuttlefishes , Sepia esculenta, Sepia subaculeata, Sepiella maindroni and two species of squids, Sepioteuthis lessomiana, Euprymna berryi were carried out in the process of artificial raising, and then argued about a feasibility of the propagation of cuttlefishes and squids. 1. The relation between the daily age (D) and the body weight(W) of Sepia exculent is expressed in a logarithmic equation, log W=3.0649 log D-4.2768. The daily rates of growth through 121 days of the raising period were 1.46 per cent for the man시 length and 1.67 percent for the body weight. The raipidest growth of Sepia esculenta is observed at the stage of 1 to 4 cm in the mantle length . At that time the daily rates of growth reach 3.3 to 5.5 percent for the mantle length and 10.4 to 12.0 percent for the body weight, respectively. The growth of Sepia esculenta varies a great deal to the bait. When fed on a dead bait the rates of growth decrease 17 per cent for the mantle length and 26 percent for the body weight compared with those fed on a live bait. 2. The relation between the daily age and the body weight of Sepia subaculeata is expressed in a logarithmic equation, log W=3.7447 log D-4.9003. The daily rates of growth through 110 days of the raising period were 1.63 percent for the mantle length and 1.83 percent for the body weight. The rapidest growth of Selia subaculeata is observed at the stage of 1.5 to 9.0 cm in the mantle length. At that time the daily rates of growth reach 3.1 to 7.4 percent for the mantle length and 6.8 to 16.7 percent for the body weight , respectively. 3. The relation between tehdaily age and the body weight of Sepiella maindroni is expressed in a ogarithmic equation , log W=2.9332 log D-3.8224 . The daily rates of growth through 133 days of the rearing period were 1.39 percent for the mantle length and 1.51 percent for the body weight . The rapidest growth of Sepiella maindroni is observed at the stage of 0.4 to 5.8 cm in the mantle length. At that time the daily rates for growth reach 4.6 to 7.3 percent for the mantle length and 8.5 to 15.4 percent for the body weight , respectively. 4. The daily rates of growth onthe stage of 0.5 to 6.0 comin the mantle length of Sepioteuthis lessoniana were 4.1 to 5.9 percent for the mantle length and 7.1 to 10.7 percent for the body weight . 5. During the rearing period of 31 days immediately after the hatching , the daily rateof feeding of Sepia esculenta marked 11.0 to 39.4 percent (28.2 percent in an average), and the efficiency of food conversion of this species reached 9.0 to 71.0percent (38.7percent in an average). Even at the more growing stage of 4.5to 6.2 cm in the mantle length, the daily rate of feeding of three species of cuttlefishes wee maintained 17.7 percent for Sepia esculenta, 30.8 percent for Sepia subaculeata and 34.7percent for Sepiella maindroni on an average. 6. The efficiency of food coversion of cuttlefishes and squids are larger than those of other fishes, and all the species are rapid in their growth. Four to five months are thought to be enough for their growing into a fair commercial size.

  • PDF

낙지 (Octopus minor)의 성 성숙과 성장 특성 (Sexual Maturity and Growth Characteristics of Octopus minor)

  • 김동수;김재만
    • 한국수산과학회지
    • /
    • 제39권5호
    • /
    • pp.410-418
    • /
    • 2006
  • Sexual maturity and growth characteristics of Octopus minor were investigated in 796 individuals from mud flats in Goorori, Muan-Goon, Korea. Gonadosomatic index (GSI) peaked between June and July in females and between November and January in males. The discrepancy in the index peaks between females and males might result from the earlier sexual maturation of males. The sex ratio was biased toward females (68%) in April and toward males (78%) in September, although the differences were not significant (p>0.05). In females, about 50% of individuals with a mantle length of 70.6 mm were sexually mature versus 100% of individuals with mantle lengths over 80 mm. In females, fecundity was also related to size, ranging from 44 eggs in individuals with a mantle length of 54 mm to 179 eggs in the female with a mantle length of 100.5 mm. The relationship between mantle length (ML) an body weight (BW) was BW=0.008 ML$^{2.2797}$ (n=389, r$^2$=0.83, p<0.01) in males and BW=0.029 ML$^{2.2797}$ (n=407, r$^2$=0.74, p<0.01) in females. Analysis of co-variation showed that the difference in the slopes of the two regression lines was significant (p<0.01). Analysis of mantle length-frequency for each month revealed 1 to 3 normal distribution modes. The growth parameters obtained by fitting the modal progression to the seasonalized von Bertalanffy growth function (VBGF) were ML$\infty$= 112.38 mm, K=1.9, C=0.90, and WP=0.1. The results indicate that the seasonal growth oscillation of the stock is very strong and winter is the season when growth is the slowest.

A Study on the Design and Composition of Victorian Women's Mantle

  • Lee, Sang-Rye;Kim, Hye-Jeong
    • 패션비즈니스
    • /
    • 제14권6호
    • /
    • pp.188-203
    • /
    • 2010
  • This study purposed to identify the design and composition characteristics of mantle through a historical review of its change and development focusing on women's dress. This analysis was particularly focused on the Victorian age because the variety of mantle designs introduced and popularized was wider than ever since ancient times to the present. For this study, we collected historical literature on mantle from ancient times to the $19^{th}$ century and made comparative analysis of design and composition, and for the Victorian age we investigated also actual items from the period. During the early Victorian age when the crinoline style was popular, mantle was of A.line silhouette spreading downward from the shoulders and of around knee length. In the mid Victorian age from 1870 to 1889 when the bustle style was popular, the style of mantle was changed to be three-dimensional, exaggerating the rear side of the bustle skirt. In addition, with increase in women's suburban activities, walking costume became popular and mantle reached its climax. With the diversification of design and composition in this period, the name of mantle became more specific and as a result, mantle, mantelet, dolman, paletot, etc. were used. The styles popular were: it looked like half-jacket and half-cape. Ornaments such as tassels, fur, braids, rosettes, tufts and fringe were attached to create luxurious effects. In the late Victorian age when the hourglass style was in fashion, mantle returned again to plain design emphasizing the details of the shoulders. The results of this study are expected to present motives for the development of contemporary designs, to contribute to the new recognition of the value of mantles, and to open a new research area of clothing history.

한국 불교 영산재 -무복에 관한 연구- (A Study on the Dancing Costumes for the Buddhist Ceremony of 'Spirit Vulture Peak')

  • 이초연
    • 복식
    • /
    • 제19권
    • /
    • pp.141-155
    • /
    • 1992
  • The Buddhist costumes, unlike the ordinary ones, have not been studied comprehensively due to their religious, non-popular and non-social features. In this regard, this paper aimed at reviewing the styles and symbolic Characters of the monks' dancing costumes for the traditional Buddhist ceremony of 'Spirit Vulture Peak'(The Intangible Cultural Asset No.50.) Here, the 'Spirit Vulture Peak Ceremony' is a kind of Buddhist ceremony commemorating the Buddha's preaches on the peak of Mt. Grdhrakuta by means of symbolized ritual and reformation procedures. The methodology of this study depended on the research of literatures, personal observation of the actual ceremony and the discussion with Priest Park Song-am. The dancing style of the Ceremony can be divided into four categories; the cymbal dancing., the drum dancing , the butterfly dancing and the column-beating dancing. And for the dancing costumes, the loose ritual mantle, the long-sleeve robe and the buddhist costume are used; the loose mantle and the long-sleeve robe are for the drum dancing. The style of the loose mantle is rectangular, sewn every odd knot between 5 and 25 ones. According to the record, its color was initially grey or red-yellow, but varied depending on the local rules. The four corners of the loose mantle have a rectangular-cloth embroidery of sky & king patterns, and the center is embroidered with the Sun'Moon designs or 'Om/Nan' letters in the Korean spells. The light of Sun/ Moon designs symbolizing the sky and the earth respectively are indigenous to a particular school in Korea. The long-sleeve robe has a traditional over-coat style. and is called otherwise of if some design is added. The total clothing or dancing costumes for the Ceremony include 'the Dae-ryung (meaning great peake)loose mantle', 'the White Paldad(meaning Chinese Character eight) long-sleeve robe and the peaked hat. The Dae-ryung mantle is a kind of ritual costumes with the shorter length than the ordinary mantles, and has a character 'Ryung' in Chinese spell attached with three to six colors. The White Paldae robe is shorter than the ordinary robes in the total length but longer in the length of sleeves. It is put on over the mantle from the left shoulder, and used often for the butterfly and column-beating dancings. It is hoped that this study will promote the study on the customs and rites of the Buddhism rather than on the thoughts, and contribute to the further studies.

  • PDF

한국해역에 분포하는 오징어의 계군분석 2. 형태학적 분석 (Population Analysis of the Common Squid, Todarodes pacificus Steenstrup in Korean Waters 2. Morphological analysis)

  • 김영혜;강용주;백철인
    • 한국수산과학회지
    • /
    • 제30권5호
    • /
    • pp.903-905
    • /
    • 1997
  • Morphological differences were studied using the analysis of covariance between various partial length and mantle length of the common Todarodes pacificus by cohorts in the Korean waters. Analysis of seven morphological characters proved that each cohort has no sexual differences, except significant sexual differences only in the Summer cohort in term of relative growth between mantle length and body weight. The three cohorts represent significant differences in morphological characters.

  • PDF

한국해역에 분포하는 오징어의 계군분석 -1. 군의 분리- (Population Analysis of the Common Squid, Todarodes pacificus Steenstrup in Korean Waters -1. Separation of Population-)

  • 김영혜;강용주
    • 한국수산과학회지
    • /
    • 제28권2호
    • /
    • pp.163-173
    • /
    • 1995
  • 본 연구는 1991년 2월부터 1992년 7월까지 우리 나라 해역에 분포하는 오징어에 대해 외투장 조성과 생식소 발달 상태에 의해 하계군, 추계군 및 동계군과 같이 세 군으로 분리하였다. 오징어의 크기와 성숙에 관한 축적된 지견에 근거하여 외투장 조성에서 군을 분리시, 채집시의 외투장과 생식소 발달 상태를 오징어의 크기와 성숙에 관한 연구자의 축적된 지견과 비교하여 분리한 군과 Tanaka(1956)의 방법을 적용하여 분리한 군이 가장 잘 일치하는 것을 알 수 있었다. 그러나 Bhattacharya(1967)와 Cassie (1954)의 방법에 의해 분리된 군과는 잘 일치하지 않았다.

  • PDF

북부 동중국해 살오징어(Todarodes pacificus) 유생분포의 계절특성 (Seasonal Characteristics of Todarodes pacificus Paralarval Distribution in the Northern East China Sea)

  • 김중진;김철호;이준수;김수암
    • 한국수산과학회지
    • /
    • 제47권1호
    • /
    • pp.59-61
    • /
    • 2014
  • We conducted eight surveys in the northern East China Sea (ECS) in winter (February - April), summer (July), and autumn (October) 2004-2009, to investigate the seasonal distribution of T. pacificus. A total of 482 paralarvae, ranging in mantle length (ML) from 1.0 - 17.0 mm, were collected at 73 out of 181 stations. There were higher numbers of paralarvae during the winter and summer months than in the autumn. There was significant seasonal variation in the paralarval mantle lengths; mantle lengths were longer in winter (April) than in summer (July). The position of oceanic fronts in the study area played an important role in restricting paralarval distribution along the inshore edge of the Tsushima Warm Current (TWC). When the TWC expanded to western Jeju Island in winter and autumn, the paralarval distribution range extended to include western Jeju Island. However, when the TWC was located southeast of Jeju Island in the summer, paralarvae were distributed along the frontal zone off southeast Jeju Island. Sites at which paralarval mantle length was <2.0 mm ML indicated that the spawning ground were likely to be within the northern ECS in winter and summer, but north of the study area in autumn.

제주도 연안에 분포하는 창꼴뚜기(Loligo edulis)의 자원생물학적 연구 (Fisheries Biology of Swordtip Squid, Loligo edulis in Jeju Island, Korea)

  • 강현정;김영혜;이은희;이동우;장대수
    • 한국패류학회지
    • /
    • 제25권1호
    • /
    • pp.23-28
    • /
    • 2009
  • 2006년 6월부터 11월까지 매월 1회씩 제주도 귀덕, 신산, 김녕, 강정 연안에서 정치망에 의해 채집된 창꼴뚜기를 대상으로 창꼴뚜기의 생식생물학적 특성에 관하여 연구하였다. 조사기간 동안 총 759 개체의 창꼴뚜기 중에서 암컷은 429 개체, 수컷은 330 개체로 나타났다. 암컷의 경우, 조사 기간 중 미숙, 중숙, 성숙, 완숙기의 개체들이 혼재하여 출현하였으며 산란이 가능한 완숙 개체는 조사기간 중 초기인 6월을 제외하고 모든기간에 걸쳐 관찰되었고, 11월에 출현비율이 가장 높았다. 수컷도 조사기간 중 미숙, 중숙, 성숙, 완숙기의 개체들이 혼재하여 출현하됐으며 생식소의 숙도가 방정이 가능한 성숙단계이상의 개체는 전 기간에 걸쳐 관찰되었고 완숙기의 개체는 암컷과 같이 11월에 출현비율이 가장 높았다. 창꼴뚜기가 산란에 참여하는 군성숙외투장을 알아본 결과 성숙외투장은 17.1cm 로 추정되었다.

  • PDF

채낚기어업에서의 살오징어(Todarodes pacificus) 장기 어획변동과 생태학적 특성 변화 (Changes in the Ecological Characteristics of Todarodes pacificus associated with Long-term Catch Variations in Jigging Fishery)

  • 조민진;김중진;양재형;김창신;강수경
    • 한국수산과학회지
    • /
    • 제52권6호
    • /
    • pp.685-695
    • /
    • 2019
  • To assess the state of Todarodes pacificus fisheries, we examined changes in major fishing and ecological characteristics by comparing jigging fishery data between high (HCLP, 1996-2000) and low (LCLP, 2013-2017) catch level periods. The peak catch occurred in October during the HCLP compared with December during the LCLP. The average catch per unit effort was higher during the HCLP (1.3 tons/jigging vessel) than LCLP (1.0 ton/jigging vessel). During the HCLP, fishing grounds were highly concentrated in the southwestern East Sea and Yamato bank, whereas during the LCLP, the distribution of grounds extended to the South Sea, West Sea, and northern East Sea (near Russian waters) at a low density. Water temperatures in the main fishing ground in the southwestern East Sea were higher at 0, 50, and 100 m depths during the LCLP than HCLP. Meanwhile, the average mantle length of catches decreased from 23.5 cm during the HCLP to 22.21 cm during the LCLP. The mantle length at 50% maturity also decreased between the two periods from 22.06 (HCLP) to 18.77 cm (LCLP). These findings will help guide future management strategies for T. pacificus.

2015년 하계 및 추계 동해 남서해역에서 출현하는 살오징어 (Todarodes pacificus) 유생의 분포 양상 (Distribution of Common Squid Todarodes pacificus Larvae in the Southwestern Part of the East Sea in Summer and Autumn, 2015)

  • 김윤하;신동훈
    • 해양환경안전학회지
    • /
    • 제25권2호
    • /
    • pp.220-228
    • /
    • 2019
  • 동해 남서해역에서의 살오징어 유생 출현 특성을 파악하기 위해 2015년 8, 9, 11월 여수 근해부터 평해 연안까지 총 35개 정점에서 IKMT 네트(망목 : $500{\mu}m$)를 사용하였으며, 초기 생활단계의 주요 해양환경 인자인 수온은 CTD(SBE9plus)로 관측하였다. 유생의 월별 외투장 자료의 통계처리를 위하여 SPSS software(ver. 12.0)를 이용하였다. 채집된 살오징어 유생의 개체수는 총 228개체로 외투장 범위는 1.4 - 21.9 mm였다. 유생밀도 범위는 8월에 $0.2-5.2inds./1,000m^3$, 9월에 $0.1-3.2inds./1,000m^3$, 11월에 $0.3-7.9inds./1,000m^3$로 나타났다. 전반적으로 유생은 연안측 정점보다 조사해역의 동남부인 부산 근해에서 더 높은 밀도를 보였다. 8, 9, 11월의 유생출현률은 각각 64.3 %, 62.9 %, 68.6 %였다. 평균외투장 범위는 5.24 - 5.68 mm였으며, 월별 평균외투장은 유의한 차이를 나타내지 않았다(p > 0.05). 또한 외투장 분포에서 4 - 5 mm 구간의 유생이 최다 출현빈도를 보였다. 유생이 채집된 정점에서 유생의 생존이 가능한 수온대가 8월에는 대부분의 정점에서 표층부터 약 20 m 부근까지 유생이 서식하기에 부적합한 수온대가 존재하였던 반면, 9월과 11월에는 표층부터 유생이 서식하기 적합한 수온대가 형성되었다. 또한 얕은 수심의 연안쪽 정점에서는 표층에서 저층까지 적수온대가 형성되었으며, 100 m 이상의 깊은 수심의 외양쪽 정점에서는 표층부터 수온약층의 상층부까지 유생의 생존가능한 수온대가 형성되었다.