Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
권호 표지

Early Osteological Development of the Larvae and Juveniles in Sevenband Grouper, Epinephelus septemfasciatus (Pisces: Serranidae)

능성어 (Epinephelus septemfasciatus) 자치어의 골격발달

  • Park, Jong Youn (Aquaculture Management Division, Aquaculture Research Institute, NFRDI) ;
  • Hong, Chang Gi (Southwest Sea Fisheries Research Institute, NFRDI) ;
  • Cho, Jae Kwon (Aquaculture Management Division, Aquaculture Research Institute, NFRDI) ;
  • Son, Maeng Hyun (Southwest Sea Fisheries Research Institute, NFRDI) ;
  • Han, Kyeong Ho (Chonnam National University, Department of Aqualife Science) ;
  • Park, Jae Min (Gyeongsangbuk-do Native Fish Business Center)
  • 박종연 (국립수산과학원 양식관리과) ;
  • 홍창기 (남서해수산연구소 해역산업과) ;
  • 조재권 (국립수산과학원 양식관리과) ;
  • 손맹현 (남서해수산연구소 해역산업과) ;
  • 한경호 (전남대학교 양식생물학전공) ;
  • 박재민 (경상북도 토속어류산업화센터)
  • Received : 2015.07.03
  • Accepted : 2015.09.23
  • Published : 2015.09.30
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Abstract

This research has been launched in order to observe the osteological development of sevenband grouper, Epinephelus septemfasciatus larvae and juveniles and will be used for the basic data of phylogenetically systematics research. We got some samples of larvae and juveniles from a adult fish which belongs to the sea cage in Geomun-do, Yeosu-si, Jeolla-namdo province, and we have watched them. The average of breeding water temperature was $21.5{\sim}24.5^{\circ}C$ (average $23.0{\pm}1.5^{\circ}C$). In yolk-sac larvae just after hatching, ossification was not observed at all, and when the average total length reached 2.66 mm, the premaxillary and maxillary forming the upper jaw, dentary forming the lower jaw, and parasphenoid forming the skull base were ossified. In addition, the preopercle and opercle forming the opercular region began to be ossified. The caudal skeleton supporting the caudal fin is built with the caudal complex consisting of the malleus and incus. Until the average total length reached 2.59 mm, ossification did not occur at all and the urostyle bent at 45-degree angle. As to the ossification of the pterygiophore, when the average total length was 6.12 mm, the first interhemal spine began to be ossified in articulation with two spines of the anal fin, and the synapse also began to be ossified in articulation with two spines of the dorsal fin. When the average total length was 21.9 mm, individuals with completed ossification of the interhemal spines and synaptic clefts began to appear.

본 연구는 능성어 자치어의 골격발달을 관찰하여 분류학적 연구의 기초자료로 이용하고자 실시하였다. 자치어는 전남 여수시 거문도에 위치한 해상가두리에서 사육하던 어미로부터 채란하여 사육한 것을 대상으로 관찰하였다. 자치어의 사육 수온범위는 $21.5{\sim}24.5^{\circ}C$ (평균 $23.0{\pm}1.5^{\circ}C$)였다. 부화 직후의 난황을 가진 자어는 골화가 전혀 이루어지지 않았고, 평균 전장 2.66 mm에 달하면 윗턱을 구성하는 전상악골과 주상악골이 골화되었고, 아래턱을 구성하는 치골이 골화하였으며, 두개골의 기저를 형성하는 부설골이 골화하였다. 새개부를 형성하는 전새개골과 주새개골의 골화가 시작되었다. 꼬리지느러미를 지지하는 미골은 추골과 골편으로 이루어진 미골복합체로 구성된다. 평균 전장 2.59 mm까지는 전혀 골화가 일어나지 않았고, 미부봉상골이 $45^{\circ}$로 휘어져 있다. 담기골의 골화는 평균 전장 6.12 mm에 첫 번째 혈관간극이 뒷지느러미 2개의 가시와 관절되어 가장 먼저 골화가 시작되고, 신경간극 또한 등 지느러미 2개의 가시와 관절되어 골화하기 시작하였으며, 혈관간극과 신경간극은 평균 전장 21.9 mm에 골화가 완료되는 개체가 출현하였다.

Keywords

References

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