CAJ | 학술논문

在实验室条件下,对马氏刺蛇尾(Ophiothrix marenzelleri Koehler)的饵料选择性、摄食率和摄食行为等进行了初步研究。结果表明,马氏刺蛇尾仅能摄食悬浮的有机颗粒,对食物种类没有选择性,但对悬浮颗粒的粒径具有选择性。观测结果显示,其摄食的食物粒径范围为10~1000μm,食物种类包括动植物碎屑、细胞较大的海洋微藻扁藻(Platymonas subcordiformis)和小新月菱形藻(Nitzschia closterium f. minutissima)等。因此,马氏刺蛇尾的食性属杂食性,是蛇尾中食微类群的成员。马氏刺蛇尾不摄食时,常处于静止状态或腕末端翘起；摄食时数条腕翘起在水中摇动,通过腕部的管足摆动将水体中的适宜食物颗粒聚集成球状颗粒运送到口中。小规格马氏刺蛇尾的摄食率显著高于较大规格蛇尾(P<<0.05),马氏刺蛇尾在一昼夜中的摄食高峰出现在8：00~14：00,但是全天均有蛇尾摄食,其昼夜摄食节律属于无明显节律型。
재실험실조건하,대마씨자사미(Ophiothrix marenzelleri Koehler)적이료선택성、섭식솔화섭식행위등진행료초보연구。결과표명,마씨자사미부능섭식현부적유궤과립,대식물충류몰유선택성,단대현부과립적립경구유선택성。관측결과현시,기섭식적식물립경범위위10~1000μm,식물충류포괄동식물쇄설、세포교대적해양미조편조(Platymonas subcordiformis)화소신월릉형조(Nitzschia closterium f. minutissima)등。인차,마씨자사미적식성속잡식성,시사미중식미류군적성원。마씨자사미불섭식시,상처우정지상태혹완말단교기；섭식시수조완교기재수중요동,통과완부적관족파동장수체중적괄의식물과립취집성구상과립운송도구중。소규격마씨자사미적섭식솔현저고우교대규격사미(P<<0.05),마씨자사미재일주야중적섭식고봉출현재8：00~14：00,단시전천균유사미섭식,기주야섭식절률속우무명현절률형。
Ophiuroids are important components of the macrobenthos and marine ecosystem. However, most pre-vious studies have focused on taxonomy and little is known of their biology or ecology. References on ophiuroids in the Chinese literature are both few and dated. This study focused on the food preference, feeding rate, and feeding behavior of Ophiothrix marenzelleri. The objectives were (1) to achieve an understanding of the feeding habits of O. marenzelleri, (2) to supplement the literature on ophiuroids, and (3) to attract people’s attention on the study of ophiuroids. The results revealed that O. marenzelleri can only feed on suspended organic particles through differentiating food particles by size. It can feed on particles ranging in diameter from 10 to 1 000 μm, including Platymonas subcordiformis with diameter of (10.3±1.2) μm and Nitzschia closterium f. minutissima (length, 12?23 μm, width, 2?3 μm). O. marenzelleri is both polyphagic and a member of microphagous group. When the O. marenzelleri were ingesting, their arms swayed in the water. The food was collected and formed into a small food ball by the tube feet at the end of the arm. The food ball was then transported to the mouth and be-came enlarged. When they were not ingesting, the arms were either stationary or cocked at the end. The feeding rate of smaller O. marenzelleri was significantly higher than that of larger ones (P<0.05). A peak in feeding ac-tivity occurred between 8:00?14:00, but there were some O. marenzelleri that ingested food at any time. Therefore, no specific feeding rhythm was observed.