Bonanomi Sara, Pellissier Loïc, Therkildsen Nina Overgaard, Hedeholm Rasmus Berg, Retzel Anja, Meldrup Dorte, Olsen Steffen Malskær, Nielsen Anders, Pampoulie Christophe, Hemmer-Hansen Jakob, Wisz Mary Susanne, Grønkjær Peter, Nielsen Einar Eg
Section for Marine Living Resources, National Institute of Aquatic Resources, Technical University of Denmark, Vejlsøvej 39, 8600 Silkeborg, Denmark.
Greenland Climate Research Centre, Greenland Institute of Natural Resources, Kivioq 2, PO Box 570, 3900, Nuuk, Greenland.
Sci Rep. 2015 Oct 22;5:15395. doi: 10.1038/srep15395.
Fishing and climate change impact the demography of marine fishes, but it is generally ignored that many species are made up of genetically distinct locally adapted populations that may show idiosyncratic responses to environmental and anthropogenic pressures. Here, we track 80 years of Atlantic cod (Gadus morhua) population dynamics in West Greenland using DNA from archived otoliths in combination with fish population and niche based modeling. We document how the interacting effects of climate change and high fishing pressure lead to dramatic spatiotemporal changes in the proportions and abundance of different genetic populations, and eventually drove the cod fishery to a collapse in the early 1970s. Our results highlight the relevance of fisheries management at the level of genetic populations under future scenarios of climate change.
捕鱼和气候变化影响着海洋鱼类的种群动态，但人们普遍忽视的是，许多物种是由基因上不同的本地适应种群组成的，这些种群可能对环境和人为压力表现出独特的反应。在这里，我们利用存档耳石中的DNA，结合鱼类种群和基于生态位的模型，追踪了西格陵兰岛80年的大西洋鳕鱼（Gadus morhua）种群动态。我们记录了气候变化和高捕鱼压力的相互作用如何导致不同遗传种群的比例和丰度发生巨大的时空变化，并最终在20世纪70年代初导致鳕鱼渔业崩溃。我们的结果凸显了在气候变化的未来情景下，在遗传种群层面进行渔业管理的重要性。
