Fish debris abundance and fluxes in sediment core M77/2_024-5

This dataset includes fish vertebrae abundances and fluxes obtained from core M77/2-024-5. Sediment core M77/2-024-5 (11°05.01'S; 78°00.91'W) was collected at 210 meters depth off Peru during Meteor expedition M77/2 in 2008 (Meteor station No. M772/677). Fish debris quantification and identification were determined in 60 samples along core M77/2-024-5 from 1093 to 1388 cm depth corresponding to 110.7 to 137.8 kyr BP. Sediment samples consisted of an average of 41 g of wet material, which yields 16.3 g of dry sediment. The fish vertebrae identification includes the following species/groups: anchovy (Engraulis ringens), goby-like fishes, juvenile fishes, Vinciguerria lucetia, hake (Merluccius gayi peruanus), blue lanternfish (Tarletonbeania crenularis), eel-shaped fish and other unidentified species. The fish debris were quantified and identified with the help of scale and vertebrae collections. The fish debris fluxes (#debris × cm−2 × y-1) were calculated by multiplying the fish debris abundance (number of fish debris x g-1) by the sedimentation rates (cm x y-1) by the dry bulk density (g x cm-3). Finally, the fluxes were multiplied by 1000.

本数据集收录了取自M77/2-024-5沉积物岩芯的鱼类椎骨丰度与通量数据。沉积物岩芯M77/2-024-5（坐标：11°05.01'S，78°00.91'W）于2008年在秘鲁外海210米水深处，由Meteor科考航次M77/2采集完成，对应站位编号为M772/677。研究人员对该岩芯1093~1388 cm深度段的60个沉积物样品完成了鱼残骸的定量分析与种类鉴定，该深度段对应的年代为距今110.7至137.8千年（kyr BP）。每份沉积物样品的湿样平均重量为41克，经烘干处理后可获得16.3克干沉积物。本次鱼类椎骨鉴定涵盖以下物种类群：秘鲁鳀（Engraulis ringens）、虾虎鱼形鱼类、幼鱼、Vinciguerria lucetia、秘鲁海无须鳕（Merluccius gayi peruanus）、蓝灯笼鱼（Tarletonbeania crenularis）、鳗形鱼类以及其他未鉴定物种。鱼残骸的定量与种类鉴定工作依托鳞片与椎骨馆藏标本完成。鱼残骸通量（单位：残骸数·厘米⁻²·年⁻¹）的计算方式为：鱼残骸丰度（单位：鱼残骸数·克⁻¹）×沉积速率（单位：厘米·年⁻¹）×干容重（单位：克·厘米⁻³）。最终，将计算得到的通量值乘以1000以得到最终结果。