Biology of Surgeonfish Acanthurus-nigrofuscus with emphasis on changeover in diet and annual gonadal cycles
Biology of Surgeonfish Acanthurus-nigrofuscus with emphasis on changeover in diet and annual gonadal cycles
复制标题
刺猬鱼的生物学，重点是饮食和年度性腺周期的改变
DOI：
--
复制
发表时间：
1987
期刊：
影响因子：
--
通讯作者：
Arthur H. Myrberg
中科院分区：
文献类型：
--
作者：
L. Fishelson;Linn W. Montgomery;Arthur H. Myrberg
对亚喀巴湾珊瑚礁沿着的黑褐刺尾鱼（Acanthuridae，Teleostei）的摄食生物学和繁殖策略进行了为期3年的研究，并在那里形成了食藻鱼类的主要生物量。这种刺尾鱼的饮食是基于从生长在潮下带岩石表面的草皮群落中选择的藻类。在一些站点A.黑褐属形成鱼群，每天从珊瑚礁的夜间避难所迁移到潮间带的觅食地点，迁移距离为500至600米。在夏季，主要食物是棕色和红色的藻类;在冬季，茂盛的绿色藻类。这种转变似乎为脂肪的积累和性腺活动的复发提供了食物基础，这些活动始于3月至4月1日。繁殖发生在大型学校的2000至2500鱼和选定的网站，持续从5月至9月。产卵发生每天从1800至1830小时，之后的鱼离开他们的夜间避难所。性腺活动高峰在7 ~ 8月，此后排卵前、后闭锁小体明显增多。在雌性产卵后的性腺中，精原细胞的包囊出现并保持到2 - 3月恢复正常活动。组织学证据和可能的解释，这种现象提供。
A 3 yr study was conducted on the feeding biology and reproductive strategies of Acanthurus nigrofuscus (Acanthuridae, Teleostei) found along the coral reefs of the Gulf of Aqaba and forming there the major biomass of algivorous fish. The diet of this surgeonfish is based on algae selected from turf communities growing on subtidal rocky surfaces. At some sites A. nigrofuscus form schools that migrate daily from nocturnal refuges in coral reefs to foraging sites on the intertidal, covering distances of 500 to 600 m. During summer the main food items are brown and red algae; in winter, lush green algae. This changeover appears to provide the food-base for accumulation of fat and recrudescence of gonadal activity initiating in March-Apnl. Reproduction occurs in large schools of 2000 to 2500 fish and on selected sites, continuing from May to September. Spawning occurs daily from 1800 to 1830 h, after which the fish depart for their night refuges. Peak of gonadal activity is in July-August, after whch an increase of pre- and postovulatory atretic bodes is prominent. In female post-spawned gonads, cysts of spermatogonia appear and remain until renewed normal activity in February-March. Histological evidence and possible explanation of this phenomenon are provided.