Temperature sensitivity of skeletal ontogeny in Oreochromis mossambicus
Temperature sensitivity of skeletal ontogeny in Oreochromis mossambicus
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DOI：
10.1111/j.0022-1112.2004.00505.x
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发表时间：
2004-10-01
影响因子：
2
通讯作者：
Power, DM
中科院分区：
文献类型：
--
作者：
Campinho, MA;Moutou, KA;Power, DM
在莫桑比克罗非鱼 Oreochromis mossambicus 中评估了骨骼个体发育对温度的敏感性，并使用培养温度操作（22、27 和 32 摄氏度）来确定年龄或长度是否给出了最适合标准化的指标。莫桑比克罗非鱼幼虫的生长由两个生长阶段组成：初始的快速生长阶段，随后是较慢的生长阶段。无论培养温度如何，软骨形成都发生在第一个快速生长阶段，而骨化则在第二个较慢生长阶段开始。骨化发生的事件顺序和速率对温度比软骨形成更敏感。累积计数为骨骼个体发生提供了有用的发育指标；总体而言，尽管标准长度（log(10)L(S)）是骨化完成的更好指标，但年龄（有效天数）可以最好地估计软骨形成和骨化开始期间的发育状态。重要功能结构的发育时间，例如对呼吸、摄食和游泳很重要的梅克尔软骨、鳃弓、中心和锁骨，在所有温度下都得到很好的保存，可能是硬骨鱼发育阶段的良好指标。 (C) 2004 年不列颠群岛渔业协会。
Sensitivity of skeletal ontogenesis to temperature was assessed in Mozambican tilapia Oreochromis mossambicus and Culture temperature manipulations (22, 27 and 32degrees C) were used to establish if age or length gave the most suitable metric For standardization. Oreochromis mossambicus larval growth was composed of two growth stanzas: an initial period of rapid growth, followed by a slower growth phase. Irrespective of culture temperature chondrogenesis occurred during the first rapid growth phase and ossification was initiated during the second slower growth phase. The sequence of events and rate at which ossification Occurred was much more sensitive to temperature than chondrogenesis. Cumulative counts provide a useful developmental index for skeletal ontogenesis; overall, age (effective days-degrees) gave the best estimation of developmental status during chondrogenesis and the initiation of ossification, although standard length (as log(10)L(S)) was a better metric for completion of ossification. The timing of development of functionally important structures, such as Meckel's cartilage, the branchial arches, the centra and the cleithrum important for breathing, feeding and swimming, was well conserved at all temperatures and may be a good index of teleost developmental stages. (C) 2004 The Fisheries Society of the British Isles.