CAJ | 학술논문

2010年11月中旬在珠海东澳岛进行管角螺冬季育苗实验,结果表明:在东澳岛11~12月,水温21~24℃,管角螺可以交配、繁殖;在水温16.5~24℃,需45~50 d完成胚胎发育;在水温17~20.5℃,稚螺7 d后能主动摄食投喂的鲜活幼贝饵料,此阶段稚螺壳高日增长0.417 mm,壳宽日增长0.17 mm,体质量日增长0.01 g;刚孵化稚螺厣封壳保水功能不强,耐干露能力较差,温度越高,露空时间越短;细砂底质条件下,稚螺的壳高、壳宽、体质量生长显著高于无底质组(p值<0.05),成活率(75%)也高于无底质组(65%);经过75 d海区网笼培育,稚螺壳高日增长0.236 mm,壳宽日增长0.124 mm,体质量日增长0.033 g,在自然海区培育条件下,稚螺生长较快.
2010년11월중순재주해동오도진행관각라동계육묘실험,결과표명:재동오도11~12월,수온21~24℃,관각라가이교배、번식;재수온16.5~24℃,수45~50 d완성배태발육;재수온17~20.5℃,치라7 d후능주동섭식투위적선활유패이료,차계단치라각고일증장0.417 mm,각관일증장0.17 mm,체질량일증장0.01 g;강부화치라염봉각보수공능불강,내간로능력교차,온도월고,로공시간월단;세사저질조건하,치라적각고、각관、체질량생장현저고우무저질조(p치<0.05),성활솔(75%)야고우무저질조(65%);경과75 d해구망롱배육,치라각고일증장0.236 mm,각관일증장0.124 mm,체질량일증장0.033 g,재자연해구배육조건하,치라생장교쾌.
: The study of the artificial breeding of Hemifusus tuba was carried out in Dong’ao Island, Zhuhai City in November, 2010. The food habits of juvenile H. tuba in different stages, Tolerance of juvenile H. tuba to exposure to drying, effects of different sediment, and the juvenile nursery in natural sea were also studied. The results were as follows:it is feasible that H. tuba breeding in November to December in Dong'ao Island. The course of embryonic development takes 45 to 50 days when the water temperature is between 16.5 and 24℃. After 7 days, The juvenile H. tuba began to feed on live bait actively under the temperature of 17~20.5 .℃ In 30 days, the shell height, shell width, body weight of juvenile H. tuba increased 0.417 mm·d-1, 0.17 mm·d-1, and 0.01g·d-1 respectively; The operculum of early juvenile H. tuba is less capable of preventing water and dry air. The higher the temperature is, the shorter time they can be exposed to air. The juvenile H. tuba under fine sand substrate grow significantly better than those in substrate-free group(P<0.05).The survival rate of fine sand substrate group, which was 75% was higher than that of substrate-free group, which was 65%. After 75 days net cage cultivation in sea, the shell height ,shell width, body weight of juvenile H.tuba increased 0.236 mm·d-1, 0.124 mm·d-1, and 0.033 g·d-1, respectively. The juvenile H.tuba grow faster under the conditions in natural sea.