양식산 볼락, Sebastes inermis Cuvier의 성장 특성

Abstract

본 연구의 목적은 양식산 볼락, Sebastes inermis Cuvier의 자·치어 시기부터 성어에 이르기까지의 성장 특성을 조사하여, 본 종에 대한 수산생물학적 연구 및 양식기술개발을 위한 기초 자료를 제공하는데 있다. 이를 위하여 250마리의 어미로부터 생산된 동일한 일령의 자어를 대상으로 산출 직후부터 1,350일째까지의 성장 특성을 조사하였다. 볼락에 있어서 산출 후 경과 일수(days after parturition, X)에 대한 전장(total length,TL)의 성장은 TL=0.0217X (r2=0.8867), 그리고 체중(body weight, BW)의 성장은 BW=0.0001X2+0.0713X (r2=0.9858)의 관계가 있었다. 또한 전장에 대한 체중의 상대성장은 BW=0.0072TL3.4373 (r2=0.9945)의 관계가 있는 것으로 나타났다. 산출 후 경과일수(X)에 따른 눈지름(eye diameter, ED) 성장은 ED=-2E-5X2+0.0326X (r2=0.9886; X, 산출 후 기일)의 관계식에 따랐다. 전장에 대한 두장(head length, HL), 주둥이길이(snout length, SL) 눈지름(ED), 후두부길이(postorbital head length, PHL)와의 관계는 각각 HL=0.2652TL (r2=0.9758), SL=0.0613TL (r2=0.9602), ED=0.0752TL (r2=0.9715), 및 PHL=0.2652TL (r2=0.9501)로 나타났다.

The objective of this study is to elucidate the growth pattern of dark-banded rockfish, Sebastes inermis Cuvier, produced by aquaculture in Korea. Larvae from 250 maternal full-sibs were reared until 1,350 days after parturition. During the rearing period, growth equations on days after parturition (X) to the total length (TL) and body weight (BW) were estimated as TL=0.0217X (r2=0.8867) and BW=0.0001X2+0.0713X (r2=0.9858), respectively. The relationship between BW and TL was BW=0.0072TL3.4373 (r2=0.9945). An increases in the eye diameter (ED) of dark-banded rockfish larvae on days after parturition (X) could be expressed as ED=-2E-5X2+0.0326X (r2=0.9886). Relative growth equations on TL to head length (HL), snout length (SL), ED and postorbital head length (PHL) were calculated as HL=0.2652TL (r2=0.9758), SL=0.0613TL (r2=0.9602), ED=0.0752TL (r2=0.9715) and PHL=0.2652TL (r2=0.9501), respectively. Since there were few reports on the long-term growth experiment of this species due to difficulties in rearing techniques, results of this study would give a useful information to the biology and commercial culture techniques of dark-banded rockfish.