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Larval transport pathways from three prominent sand lance habitats in the Gulf of Maine
Fisheries Oceanography ( IF 2.6 ) Pub Date : 2022-03-15 , DOI: 10.1111/fog.12580
Justin J. Suca 1, 2, 3, 4 , Rubao Ji 1 , Hannes Baumann 5 , Kent Pham 6, 7 , Tammy L. Silva 8 , David N. Wiley 8 , Zhixuan Feng 1, 9 , Joel K. Llopiz 1
Affiliation  

Northern sand lance (Ammodytes dubius) are among the most critically important forage fish throughout the Northeast US shelf. Despite their ecological importance, little is known about the larval transport of this species. Here, we use otolith microstructure analysis to estimate hatch and settlement dates of sand lance and then use these measurements to parametrize particle tracking experiments to assess the source–sink dynamics of three prominent sand lance habitats in the Gulf of Maine: Stellwagen Bank, the Great South Channel, and Georges Bank. Our results indicate the pelagic larval duration of northern sand lance lasts about 2 months (range: 50–84 days) and exhibit a broad range of hatch and settlement dates. Forward and backward particle tracking experiments show substantial interannual variability, yet suggest transport generally follows the north to south circulation in the Gulf of Maine region. We find that Stellwagen Bank is a major source of larvae for the Great South Channel, while the Great South Channel primarily serves as a sink for larvae from Stellwagen Bank and Georges Bank. Retention is likely the primary source of larvae on Georges Bank. Retention within both Georges Bank and Stellwagen Bank varies interannually in response to changes in local wind events, while the Great South Channel only exhibited notable retention in a single year. Collectively, these results provide a framework to assess population connectivity among these sand lance habitats, which informs the species' recruitment dynamics and impacts its vulnerability to exploitation.

中文翻译:

缅因湾三个著名的沙矛栖息地的幼虫运输路径

北沙枪(Ammodytes dubius) 是美国东北部大陆架最重要的饲料鱼之一。尽管它们具有生态重要性,但对该物种的幼虫运输知之甚少。在这里,我们使用耳石微结构分析来估计沙枪的孵化和沉降日期,然后使用这些测量来参数化粒子跟踪实验,以评估缅因湾三个主要沙枪栖息地的源汇动态:Stellwagen Bank、Great南海峡和乔治银行。我们的研究结果表明,北部沙矛的中上层幼虫持续时间约为 2 个月(范围:50-84 天),并表现出广泛的孵化和定居日期。前向和后向粒子跟踪实验显示出显着的年际变化,但建议运输通常遵循缅因湾地区从北向南的环流。我们发现 Stellwagen Bank 是 Great South Channel 幼虫的主要来源,而 Great South Channel 主要作为 Stellwagen Bank 和 Georges Bank 幼虫的水槽。保留可能是乔治银行幼虫的主要来源。Georges Bank 和 Stellwagen Bank 内的留存率每年都会因当地风事件的变化而变化,而大南海峡仅在一年内表现出显着的留存率。总的来说,这些结果为评估这些沙矛栖息地之间的种群连通性提供了一个框架,这为该物种的招募动态提供了信息,并影响了其对开发的脆弱性。我们发现 Stellwagen Bank 是 Great South Channel 幼虫的主要来源,而 Great South Channel 主要作为 Stellwagen Bank 和 Georges Bank 幼虫的水槽。保留可能是乔治银行幼虫的主要来源。Georges Bank 和 Stellwagen Bank 内的留存率每年都会因当地风事件的变化而变化,而大南海峡仅在一年内表现出显着的留存率。总的来说,这些结果为评估这些沙矛栖息地之间的种群连通性提供了一个框架,这为该物种的招募动态提供了信息,并影响了其对开发的脆弱性。我们发现 Stellwagen Bank 是 Great South Channel 幼虫的主要来源,而 Great South Channel 主要作为 Stellwagen Bank 和 Georges Bank 幼虫的水槽。保留可能是乔治银行幼虫的主要来源。Georges Bank 和 Stellwagen Bank 内的留存率每年都会因当地风事件的变化而变化,而大南海峡仅在一年内表现出显着的留存率。总的来说,这些结果为评估这些沙矛栖息地之间的种群连通性提供了一个框架,这为该物种的招募动态提供了信息,并影响了其对开发的脆弱性。保留可能是乔治银行幼虫的主要来源。Georges Bank 和 Stellwagen Bank 内的留存率每年都会因当地风事件的变化而变化,而大南海峡仅在一年内表现出显着的留存率。总的来说,这些结果为评估这些沙矛栖息地之间的种群连通性提供了一个框架,这为该物种的招募动态提供了信息,并影响了其对开发的脆弱性。保留可能是乔治银行幼虫的主要来源。Georges Bank 和 Stellwagen Bank 内的留存率每年都会因当地风事件的变化而变化,而大南海峡仅在一年内表现出显着的留存率。总的来说,这些结果为评估这些沙矛栖息地之间的种群连通性提供了一个框架,这为该物种的招募动态提供了信息,并影响了其对开发的脆弱性。
更新日期:2022-03-15
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