Ontogenetic difference of beak elemental concentration and its possible application in migration reconstruction for Omma
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Ontogenetic difference of beak elemental concentration and its possible application in migration reconstruction for Ommastrephes bartramii in the North Pacific Ocean Zhou Fang1, 3, 4, 5, Bilin Liu1, 3, 4, 5, Xinjun Chen1, 2, 3, 4, 5*, Yong Chen6 1 College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China 2 Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine
Science and Technology (Qingdao) , Qingdao 266237, China 3 National Engineering Research Center for Oceanic Fisheries, Shanghai Ocean University, Shanghai 201306, China 4 Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources of Ministry of Education, Shanghai Ocean
University, Shanghai 201306, China 5 Key Laboratory of Oceanic Fisheries Exploration, Ministry of Agriculture, Shanghai 201306, China 6 School of Marine Sciences, University of Maine, Orono, Maine 04469, USA
Received 9 February 2018; accepted 15 November 2018 © Chinese Society for Oceanography and Springer-Verlag GmbH Germany, part of Springer Nature 2019
Abstract
The migration route of oceanic squid provides critical information for us to understand their spatial and temporal variations. Mark-recapture and electronic tags tend to be problematic during processing. Cephalopod hard structures such as the beak, containing abundant ecological information with stable morphology and statolithlike sequences of growth increments, may provide information for studying spatio-temporal distribution. In this study, we developed a method, which is based on elemental concentration of beaks at different ontogenetic stages and sampling locations, to reconstruct the squid migration route. We applied this method to Ommastrephes bartramii in the North Pacific Ocean. Nine trace elements were detected in the rostrum sagittal sections (RSS) of the beak using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). For those elements, significant differences were found between the different ontogenetic stages for phosphorus (P), copper (Cu) and zinc (Zn). Sodium (Na), P and Zn were chosen as indicators of sea surface temperature (SST) and a regression model was estimated. The high probability of occurrence in a particular area represented the possible optimal squid location based on a Bayesian model. A reconstructed migration route in this study, combining all the locations at different ontogenetic stages, was consistent with that hypothesized in previous studies. This study demonstrates that the beak can provide useful information for identifying the migration routes of oceanic squid. Key words: Ommastrephes bartramii, beak, trace element, ontogenetic stage, migration route Citation: Fang Zhou, Liu Bilin, Chen Xinjun, Chen Yong. 2019. Ontogenetic difference of beak elemental concentration and its possible application in migration reconstruction for Ommastrephes bartramii in the North Pacific Ocean. Acta Oceanologica Sinica, doi: 10.1007/s13131-019-1431-5
1 Introduction The cephalopod, an important oceanic i
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