중국새뱅이(십각目:새뱅이科)의 卵 및 幼生 發生

Kyu Jung CHOE(崔圭檉),Dong Cheol KIM(金東喆) 전남대학교 수산과학연구소 1997 수산과학연구소논문집 Vol.6 No.-

The developmental process of larvae and eggs of the sawtooth caridina, Caridina denticulta sinensis Kemp, were observed. Spawned eggs were oval sphape. The diameter of the eggs was 1.22㎜ (1.08~1.36㎜). The eggs were attached on the abdomen of the shrimps. Fecundities of shrimps ranged from 50 to 120 eggs (mean: 85). The chromatopore was redish, like star and on the yolk. The present species shows the typical larval development of the group of atyids characterized by large egg. The larval hatched from the ovigerous female (23±1℃) over 20 days. Based on morphological characters the egg development was divided into six stages(nuclear division, cleavage, blastula, gastruation, rudiments of embryonic, hatching stage). The post-zoea was 2.85±0.5㎜ and had 7+7 spines on the telson. After about 5 day, the uropods showed completed shape.

순환여과방식에 의한 참전복의 성장

Kyu Jung CHOE(崔圭檉),Young Gu KWAK(郭容求) 전남대학교 수산과학연구소 1998 수산과학연구소논문집 Vol.7 No.-

To promote abalone production in aquaculture, we developed a new recirculatory culture system and its efficiency compared with flowing water system, and investigated of the growth rate of young abalone, Haliotis discus hannai on different kinds of shelters (polycarbonate-magnetic coated: PCM, plastic shelter, poly vinyl chloride: PVC). During experimental periods, range of water quality in recirculatory culture system was as followed, water temperature : 8.3~26.7℃, specific gravity : 1.0223~1.0268, pH : 7.35~8.81, DO : 5.06~5.80 ppm, NH4 : 2.24~4.48 ㎍-at/ l. Growth rate of shell length, 28.3%, of young abalone, H. discus hannai reared on PCM shelter was higher than on plastic shelter 24.3% and PVC shelter 23.7%. In weight ratio of a part to body weight of young abalone, H. discus hannai, meat and shell increasing weight ratio were 1.9% and 0.2%, but visceral weight ratio was decreased 2.1%. Survival rate of abalone, H. discus hannai in experimental periods was 97.33~98.28% in August~September, 98.93~99.30% in October~December, and average survival rate was 98.4%. Survival rate in autumn and winter was higher than in summer.

살조개, protothaca jedoensis의 成長에 따른 形態變異에 對하여

Kyu Jung CHOE(崔圭檉),Jeong KIM(金正) 전남대학교 수산과학연구소 1996 수산과학연구소논문집 Vol.5 No.-

The study on morphological variations of Venus clam, Protothaca jedoensis according to its growth caught at Dumunpo and Baegyang located at the south coast of Korea was carried out from Septemper, 1994 to August, 1995. The obtained results were as follows: 1. The relationship between the shell length and the shell height: Dumunpo clam Y = -0.319 + 0.893X(r = 0.964) Baegyang clam Y = -0.832 + 0.854X(r = 0.954) The relationship between the shell length and the shell breadth: Dumunpo clam Y = -3.817 + 0.645X(r = 0.941) Baegyang clam Y = -1.206 + 0.602X(r = 0.890) The relationship between the shell length and the total weight: Dumunpo clam Y = 0.000157X³ ¹⁸⁵(r = 0.967) Baegyang clam Y = 0.000396X² ⁹³⁰(r = 0.962) 2. As shown in the above products, differences between the shell breadth to the shell length and the total weight to the shell length were remarkable. However, regarding to the shell height to the shell length, no differences have been out. The growth was more rapid at the coast of Dumunpo than at Baegyang. 3. The Venus clam shows quite different characteristics depending on with growing environments. This seems to reflect that the shape of the Venus clam is influenced by its environments.

키조개(Atrina pectinata)의 營養成分-2 - 一般成分과 構成아미노산 組成

Kyu Jung CHOE(崔圭檉) 전남대학교 수산과학연구소 1993 수산과학연구소논문집 Vol.2 No.-

To investigate food components of the pen shell, Atrina pectinata, the collected samples were divided into two groups: smooth shells (Type A) and coarse shells (Type B), and the proximate composition and the amino acid profile of the adductor, and the soft part (except for the adductor) of each group was invertigated. The protein of the adductor was much higher content(18.0-24.0g/100g) than that of the soft part (9.2~11.7g/100g), whereas the moisture content of the adductor was lower than that of the soft part. The fat and lime content of the soft part were higher than those of the adductor rainging from 5.0 to 5.8g/100g. Amino acids were much more contained in the adductor than in the soft part, and the soft part was occupied by aspartic acid, glutamic acid, alanine, leucine, lysine, and arginine, whose content was above 50% of the total amino acid. The highly contained lysine and alanine giving a sweet taste, the glutamic acid giving a savory taste, and the arginine giving a good taste in the flesh were considered to play an important role of a unique taste of the pen shell itself. The proximate composition and amino acid profile of the pen shell showed no apparent difference between Type A and Type B.

참굴(crassostrea gigas) 유생사육시의 수온 및 수용밀도의 영향에 관하여

Kyu Jung CHOE(崔圭檉),Byoung Hak KIM(金炳鶴) 전남대학교 수산과학연구소 1995 수산과학연구소논문집 Vol.4 No.-

This study was carried out to develop the technique for artificial seedling production of the Pacific oyster (Crassostrea gigas). The larval of pacific oyster were reared at various stocking density (1, 5, 10, 20 inds./㎖) and water temperatures (20, 22, 25, 28℃). The maximum growth and survial rate of the larvae was showed in the stocking density 5~10 inds./㎖ at 25℃.

참전복 방류어장에 출현한 害敵生物의 종조성 및 양적변동

한경호(Kyeong Ho HAN),최규정(Kyu Jung CHOE),박영조(Young Jo PARK),이원교(Won Kyo LEE),신종암(Jong Ahm SHIN),정관식(Kwan Sik JEONG) 전남대학교 수산과학연구소 1998 수산과학연구소논문집 Vol.7 No.-

To determine seasonal fluctuations in abundance and species composition, predatory animals of young abalone, Haliotis discus hannai samples were collected by trammel net from January to December 1997 off Sukbyung in Kyoungsangbuk-do. A total of 1,662 predatory animals were sampled and identified into 49 species, 31 families, 12 orders and 4 phylum. Of the twelve orders, Scorpaniformes, Perciformes, Pleuronectiformes and Tetraodontiforms accounted for approximately 63.39% of the predatory animal fauna in this area. Scorpanidae was dominant representing 5 species. Of 49 species identified, Asterina pectinifera, Ditrema temmincki, Neptunea polycostata, Charybdis japonica, Anthocidaris crassispina, Pugettia quadridens, Hexagrammos otakii, Thammaconus modestus, Hexagrammos agrammus, Hemicentrotus pulcherrimus, Takifugu niphobles and Pleurogrammus azonus accounted for 72.38% of the individuals collected. Paroctopus doflerini, Hexagrammos otakii, Ditrema temmincki, Pleurogrammus azonus, Thammaconus modestus, Hexagrammos agrammus, Conger myriaster, Platycephalus indicus and Halichoeres poecilopterus constituted 84.80% of the total biomass. The number of individuals were larger in spring than in winter. A peak abundance of total individuals occurred in May; the following abundance in June; the lowest abundance in March. The number of species did not showed seasonal variations however, greater biomass was observed from January to March than July to December.

여름철 한국 남해연안 어장에 출현한 浮遊性卵 및 仔稚漁 分布

Kyeong Ho HAN(韓景鎬),Kyu Jung CHOE(崔圭檉),Han Choon YANG(梁漢春),Yong Uk KIM(金容億) 전남대학교 수산과학연구소 1997 수산과학연구소논문집 Vol.6 No.-

This study was carried out during the period of July 24~30, 1997 in order to obtain the information of the surface distributional features of ichthyoplankton in the adjacent waters of South Sea. The dominant fish eggs included the eggs of Engraulis japonicus, Maurolicus mullen and others. The eggs of Engraulis japonicus and Maurolicus mullen were 99.88% and 0.11% of the total eggs abundance, respectively. Nineteen taxa of pelagic larvae were collected. Among them 12 taxa were identified to the species level, and 7 taxa to the genus level. The domninant species was Engraulis japonicus accounting for 86.37% of the total larvae and followed by Gnathagnus elongatus (2.94%). Other major species were Argyrosomus argentatus (1.46%), Gobiidae spp. (1.23%), Paralichthys olivaceus (1.09%) and Auxis spp. (1.02%). These 6 taxa constituted 94.11% of the total larvae collected. The species diversities were low as E. japonicus eggs and larvae were predominant.

화태도 양식장 주변해역의 계절별 수질변동 특성

조현서(Hyeon Seo CHO),최규정(Kyu Jung CHOE) 전남대학교 수산과학연구소 1995 수산과학연구소논문집 Vol.4 No.-

Hwatae island is located in the southern entrance of Kamak bay,and the aquaculture area around it is a productive sea. The seasonal characteristics of water quality was studied from Feb.,1994 to Oct.,1994 around aquaculture area in Hwatae island.The results are as follows: 1) The characteristics of water quality around aquaculture area showed that autochthonous contribution was higher than that from neighbor sea area as Kamak bay and western-south sea. 2) Chemical oxygen demand(COD) was the lowest mean value of 0.92㎎/ℓ on surface of autumn season in the range of 0.27~1.58,while it was the highest of 1.68㎎/ℓ on bottom of spring season in the range of 0.65~2.80㎎/ℓ.And,which mean that almost area studied is in the eutrophic environment. 3) Nutrients were the lowest value on both layer of spring season except nitrogen on bottom layer of same season. 4) N/P ratios were lower than 16 of Redfield ratio in the almost season with the range of 4.51~11.25 except of bottom layer at spring and summer season. It mean that nitrogen is more limiting constituent than phosphorous in the growth of phytoplankton. 5) Eutrophication indices were high in the almost season expect summer in the range of 0~1.37. If mean that wide area of aquaculutre around Hwatae island is in the condition of eutrophication.And,chemical oxygen demand was considerable parameter to determine eutrophication index in the almost season,while dissolved inorganic nitrogen(DIN) and dissolved inorganic phosphorous(DIP) were the same in the winter and spring,and autumn, respectively.

한국산 밀어 ( Rhinogobius brunneus ) 의 산란습성 , 란발생 및 자어의 형태발달

한경호(Kyeong Ho Han),김용억(Yong Uk Kim),최규정(Kyu Jung Choe) 한국수산과학회 1998 한국수산과학회지 Vol.31 No.1

e spawning behavior, development of eggs and larvae of the Korea freshwater goby, Rhinogobius brunneus(Temminck et Schlegel) were studied. The eggs were spawned as a one-layer mass, hanging from the underside of a small pebble, and guarded by one male. The eggs were elliptic, about 1.48㎜ in length and 0.65㎜ in breadth, with a round top and a somewhat flat base with glutinous fibers. Hatching in the indoor tank with 17.0℃ in mean water temperature started from the 146 hours after fertilization. In the late developing stages, the embryo moved and freely changed its head to face the free tip of the chorion(normal egg) or to the basal end with a boundle of adhesive filaments (agrippa egg). Newly-hatched larvae were 3.10-3.30㎜ in total length (mean: 3.22㎜), and mouth and anus were not yet open. Melanophores were present on the air-bladder, around the anus, and on the ventral part of the caudal region. The larva 3-4 days old transformed to postlarval stage, and they were 3.30-3.85㎜ in total length (mean: 3.60㎜). As yolk sac and oil globules werw nearly absorbed, mouth and anus were open, and they fed rotifers actively. In 20-22 days after hatching, the larvae grew to 5.85㎜ in TL, and the caudal notochord flex at 45°.

가막만에서 살포식 및 수하식 양식에 따른 피조개(Scapharca broughtonii)의 성장과 생존율

최상덕(Sang Duk CHOI),김양섭(Yang Seop KIM),우찬열(Chan Yeoul Woo),이용한(Yong Han LEE),조주현(Ju Houn Jo),김두용(Doo Yong KIM),최규정(Kyu Jung CHOE) 전남대학교 수산과학연구소 2000 수산과학연구소논문집 Vol.9 No.-

A hanging and bottom culture experiment of ark shells, Scapharca broughtonii, one of the edible clams, was carried out in Kamark Bay of southern of Korea to find the state of growth and any problems which influence them from May to December 1999. At sampling station, water temperature, specific gravity, pH, DO, PO₄-P, DIN and COD were 10.2~25.8℃, 1.0200~1.0262, 7.71~8.94㎎/ℓ, 0.001~0.015㎎/ℓ, 0.006~0.074㎎/ℓ and 0.40~2.03㎎/ℓ, respectively. And the habitat sediment was composed of mud. Seed shells at an average length of 2.2mm(1.4~3.1mm), height of 1.2mm(0.7~1.3mm) were planted on bottom and hanging May 1999. The growth rate of seeds in bottom was batter then in hanging. For seven months, an average shell length, shell height, shell breadth, total weight of ark shells cultured in hanging attained to 41.9mm, 32.2mm, 24.5mm and 18.9g, respectively. And an average shell length, shell height, shell breadth, total weight of ark shells cultured in bottom were gained to 63.6mm, 49.6mm, 40.3mm and 67.5g, respectively. It showed that the state of growth was favorable. But the survival rate of seeds in hanging(61.5%) was batter then in bottom(83.7%).