The moment of tooth: rate, fate and pattern of Pacific lingcod dentition revealed by pulse-chase

The moment of tooth: rate, fate and pattern of Pacific lingcod dentition revealed by pulse-chase
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牙齿的时刻:脉搏追踪揭示太平洋灵鳕牙列的速率、命运和模式

DOI:
10.1098/rspb.2021.1436
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发表时间:
2021
期刊:
Proceedings of the Royal Society B: Biological Sciences
影响因子:
--
通讯作者:
Cohen, K. E.
Cohen, K. E.
中科院分区:
--
文献类型:
--
作者:
Carr, E. M.;Summers, A. P.;Cohen, K. E.

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多骨软骨和硬骨鱼类的牙齿替换率很难确定,因为缺乏明显的图案和保存标本足够长的时间来观察替换。脉冲追踪是一种荧光技术,可以对正在发育的矿化组织进行不同的着色。我们提出了长齿蛇(ophiodon elongatus,太平洋伶鳕)口腔和咽部滞留的牙齿替换率和位置数据。我们评估了20条鱼的1万多颗牙齿,发现每天更换大约两颗牙齿(占牙齿的3.6%)。一颗牙齿在牙齿电池中平均存放27天。下咽颌(LPJ)的置换率较高。我们发现喂食鱼和非喂食鱼的替换率没有差异,这表明喂食不是牙齿替换的驱动因素。灵鳕鱼的牙齿有大小和位置的决定;一个地方的小牙齿不会长成大牙齿,即使附近的大牙齿掉了。我们还发现,相对于前部,LPJ后部的置换率增加。我们认为灵鳕鱼的牙齿在发育过程中不会在颌骨中迁移;它们的牙齿大小和位置是决定的,在它们的功能位置长出。
Tooth replacement rates of polyphyodont cartilaginous and bony fishes are hard to determine because of a lack of obvious patterning and maintaining specimens long enough to observe replacement. Pulse-chase is a fluorescent technique that differentially colours developing mineralized tissue. We presentin situtooth replacement rate and position data for the oral and pharyngeal detentions ofOphiodon elongatus(Pacific lingcod). We assessed over 10 000 teeth, in 20 fish, and found a daily replacement rate of about two teeth (3.6% of the dentition). The average tooth is in the dental battery for 27 days. The replacement was higher in the lower pharyngeal jaw (LPJ). We found no difference between replacement rates of feeding and non-feeding fish, suggesting feeding was not a driver of tooth replacement. Lingcod teeth have both a size and location fate; smaller teeth at one spot will not grow into larger teeth, even if a large tooth nearby is lost. We also found increased rates of replacement at the posterior of the LPJ relative to the anterior. We propose that lingcod teeth do not migrate in the jaw as they develop; their teeth are fated in size and location, erupting in their functional position.
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