한국해양학회지

The Korean Society of Oceanography (한국해양학회)
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Studies on the Spanish Mackerel Populations (1) Age Determination

삼치 자원에 대한 연구 (1) 연령사정

  • 김완수 (서울대학교 문리과대학 해양학과)
  • Published : 1970.06.01
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Abstract

This work concerns age studies of the spanish mackerel by vertebrae. The spanish mackerel samples were obtained mainly from Yosoo and Inchon regions during July to December, 1969. A total of 292 fish was collected during the present study. Except the vertebrae, the incremental growth is found to be vague or complicated on the most bony parts in spanish mackerel. The spanish mackerel has 50 vertebrae, and the size of vertebra varies according to its position. After several studies, therefore, sample centrum was selected from the 23rd vertebra throughout the present study. Sample centrum was then stained with Alizarin Red S. and examined under binocular stereoscopic microscope illuminated by reflected light. The surface of the centrum shows many ring-marks running parallel to the edge. The ring-marks were counted and the measurements of centrum radius (R) and radii of the ring-marks (r$\_$i/) were made by eyepiece micrometer. From available data, the average of each ring-mark radius was found to be; r$\_$1/=2.05mm, r$\_$2/=3.11mm, r$\_$3/=4.05mm, r$\_$4/=4.89mm, r$\_$5/=5.70mm and r$\_$6/=6.47mm, respectively. The mean fork length at the time of ring-mark formation was calculated to be; l$\_$1/=297.6mm, l$\_$2/= 390.1mm, l$\_$3/=472.2mm, l$\_$4/=545.5mm, l$\_$5/=616.2mm, and l$\_$6/= 683.4mm, respectively.

삼치, Scomberomorus niphonius (Cuvier et Valenciennes), 는 우리나라 수출전략어종중 가장 중요한 위치를 차지하고 있는 어종의 하나이며 1968년도 삼치총어획고는 7,590 M/T으로서 7억1천4백여만원선에 달하였으며 이중 거의 전량이 수출되고 있다. 이와같이 경제적 위치가 높은 어종인데도 불구하고 삼치자원에 대한 조사연구보고는 전혀 없어 이 자원에 대한 조사연구가 절실히 요망되어 왔었다. 필자는 자원해석을 행함에 있어서 무엇보다 기분적인 지견이 되는 성장과 년령과의 관계를 구명하기 위한 제1차 조사작업으로 삼치의 년령사정법에 관한 문제를 취급하였다. 1969년에 발생한 서남해안 일대의 코레라 사태와 제한된 연구기간등으로 인한 계절적 자료의 부족으로 상기목적에 적합한 표분을 계통적으로 수집하기 못해 완전한 검토는 못하였지만 일부 1969년도 자료를 분석한 결과 춘추골로서 년령사정이 가능하다는 것을 알게 되어 이에 그 개요를 보고한다.

Keywords

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