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Modifying effects of a cobble substrate on thermal environments and implications for embryonic development in lake whitefish (Coregonus clupeaformis )
Journal of Fish Biology ( IF 2 ) Pub Date : 2020-04-13 , DOI: 10.1111/jfb.14331
Christopher Thome 1, 2 , Taylor Laframboise 1 , Charles Mitz 3 , Eric Clancy 2 , Jacob Bates 1 , Christopher M Somers 4 , Richard G Manzon 4 , Joanna Y Wilson 5 , John M Gunn 2 , Douglas R Boreham 1, 2
Affiliation  

A laboratory flume was constructed to examine substrate effects on aquatic development. The flume was designed as a once through system with a submerged cobble filled corebox. Lake whitefish (Coregonus clupeaformis) embryos and temperature probes were deployed at multiple sites within the cobble and in the open water channel. Embryos were incubated in the flume for two different experimental periods; one to examine substrate impacts during natural lake cooling (37 d: December 5, 2016 - January 10, 2017) and the second to investigate substrate effects while administering a twice weekly 1 h heat shock (51 d: January 11 - March 2, 2017). During incubation, no significant difference was found in the average temperature between locations; however, temperatures were more stable within the cobble. Following both incubation periods, embryos retrieved from the cobble were significantly smaller in both dry mass and body length by up to 20%. These results demonstrate differences between embryos submerged in a cobble substrate and in the open water column, highlighting the need to consider the physical influences from the incubation environment when assessing development effects as part of any scientific study or environmental assessment. This article is protected by copyright. All rights reserved.

中文翻译:

鹅卵石基质对热环境的影响以及对湖白鱼(Coregonus clupeaformis)胚胎发育的影响

建造了一个实验室水槽来检查底物对水生发育的影响。水槽被设计为带有浸入式鹅卵石填充芯盒的单程系统。湖白鱼(Coregonus clupeaformis)胚胎和温度探头被部署在鹅卵石和开阔水道内的多个地点。胚胎在水槽中孵化了两个不同的实验期;第一个用于检查自然湖泊冷却过程中的底物影响(37 天:2016 年 12 月 5 日 - 2017 年 1 月 10 日),第二个用于在每周两次 1 小时热休克(51 天:2017 年 12 月 5 日 - 2 月 2 日)时研究底物影响)。孵化过程中,各地点平均温度无显着差异;然而,鹅卵石内的温度更稳定。在两个潜伏期之后,从鹅卵石中取出的胚胎在干重和体长方面都明显小了 20%。这些结果表明浸没在鹅卵石基质和开放水柱中的胚胎之间存在差异,突出表明在评估发育影响时需要考虑孵化环境的物理影响,作为任何科学研究或环境评估的一部分。本文受版权保护。版权所有。本文受版权保护。版权所有。本文受版权保护。版权所有。
更新日期:2020-04-13
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