DOI: 10.5061/dryad.dd00m
title: Data from: Rapid mobilization of abdominal fat in migrating eared grebes

description: Eared grebes Podiceps nigricollis, like shorebirds and other long-distance
 migrants, lay down large amounts of fat to power their journeys. To
 investigate the pattern of how fat and soft tissue might be mobilized, we
 used grebes killed in migration and applied computed tomography to
 reconstruct how stores in the chest, thorax, and abdomen were reduced as
 body weight decreased. Fat and soft tissue were each mobilized at a
 constant rate through the entire migration. Fat stores in birds embarking
 on migration were greater in the abdomen than thorax than chest. In
 contrast to previous studies indicating that abdominal fat was mobilized
 first, we found that fat from all areas was mobilized concurrently, but
 that abdominal fat was catabolized at a greater rate. We suggest why this
 pattern might be advantageous, consider whether inter-depot differences in
 fat composition might be involved, and note possible energetic
 consequences. Whether our findings pertain to other obese or long distance
 migrants remains to be determined.
description: CTvsEXT fat
 measurementsCTvsEXT_table.csvCT measurements tableCT_Fat_table_complete.csvD06 fat tissue segmentationEared grebe (D-06) downed in Dugway, UT, during Spring migration towards Great Salt Lake. After segmentation in Mimics, jpg files were exported with fat tissue highlighted. Images allowed landmark identification and slice range for each ROI (region of interest) - chest, thorax and abdomen. Also, a txt file with fat area measurement for each slice was generated. Depot fat measurement was calculated by matching ROI slice range and fat values.D06-fat.zipCC43 fat tissue segmentationEared grebe (CC-43) downed in Cedar City, UT, during Fall migration leaving Great Salt Lake. After segmentation in Mimics, jpg files were exported with fat tissue highlighted. Images allowed landmark identification and slice range for each ROI (region of interest) - chest, thorax and abdomen. Also, a txt file with fat area measurement for each slice was generated. Depot fat measurement was calculated by matching ROI slice range and fat values.CC43-fat.zipCC53 fat tissue segmentationEared grebe (CC-53) downed in Cedar City, UT, during Fall migration leaving Great Salt Lake. After segmentation in Mimics, jpg files were exported with fat tissue highlighted. Images allowed landmark identification and slice range for each ROI (region of interest) - chest, thorax and abdomen. Also, a txt file with fat area measurement for each slice was generated. Depot fat measurement was calculated by matching ROI slice range and fat values.CC53-fat.zipCC56 fat tissue segmentationEared grebe (CC-56) downed in Cedar City, UT, during Fall migration leaving Great Salt Lake. After segmentation in Mimics, jpg files were exported with fat tissue highlighted. Images allowed landmark identification and slice range for each ROI (region of interest) - chest, thorax and abdomen. Also, a txt file with fat area measurement for each slice was generated. Depot fat measurement was calculated by matching ROI slice range and fat values.CC56-fat.zipCC67 fat tissue segmentationEared grebe (CC-67) downed in Cedar City, UT, during Fall migration leaving Great Salt Lake. After segmentation in Mimics, jpg files were exported with fat tissue highlighted. Images allowed landmark identification and slice range for each ROI (region of interest) - chest, thorax and abdomen. Also, a txt file with fat area measurement for each slice was generated. Depot fat measurement was calculated by matching ROI slice range and fat values.CC67-fat.zipCC74 fat tissue segmentationEared grebe (CC-74) downed in Cedar City UT, during Fall migration leaving Great Salt Lake. After segmentation in Mimics, jpg files were exported with fat tissue highlighted. Images allowed landmark identification and slice range for each ROI (region of interest) - chest, thorax and abdomen. Also, a txt file with fat area measurement for each slice was generated. Depot fat measurement was calculated by matching ROI slice range and fat values.CC74-fat.zipD05 fat tissue segmentationEared grebe (D-05) downed in Dugway, UT, during Spring migration towards Great Salt Lake. After segmentation in Mimics, jpg files were exported with fat tissue highlighted. Images allowed landmark identification and slice range for each ROI (region of interest) - chest, thorax and abdomen. Also, a txt file with fat area measurement for each slice was generated. Depot fat measurement was calculated by matching ROI slice range and fat values.D05-fat.zipD13 fat tissue segmentationEared grebe (D-13) downed in Dugway, UT, during Spring migration towards Great Salt Lake. After segmentation in Mimics, jpg files were exported with fat tissue highlighted. Images allowed landmark identification and slice range for each ROI (region of interest) - chest, thorax and abdomen. Also, a txt file with fat area measurement for each slice was generated. Depot fat measurement was calculated by matching ROI slice range and fat values.D13-fat.zipD15 fat tissue segmentationEared grebe (D-15) downed in Dugway, UT, during Spring migration towards Great Salt Lake. After segmentation in Mimics, jpg files were exported with fat tissue highlighted. Images allowed landmark identification and slice range for each ROI (region of interest) - chest, thorax and abdomen. Also, a txt file with fat area measurement for each slice was generated. Depot fat measurement was calculated by matching ROI slice range and fat values.D15-fat.zipD16 fat tissue segmentationEared grebe (D-16) downed in Dugway, UT, during Spring migration towards Great Salt Lake. After segmentation in Mimics, jpg files were exported with fat tissue highlighted. Images allowed landmark identification and slice range for each ROI (region of interest) - chest, thorax and abdomen. Also, a txt file with fat area measurement for each slice was generated. Depot fat measurement was calculated by matching ROI slice range and fat values.D16-fat.zipD17 fat tissue segmentationEared grebe (D-17) downed in Dugway, UT, during Spring migration towards Great Salt Lake. After segmentation in Mimics, jpg files were exported with fat tissue highlighted. Images allowed landmark identification and slice range for each ROI (region of interest) - chest, thorax and abdomen. Also, a txt file with fat area measurement for each slice was generated. Depot fat measurement was calculated by matching ROI slice range and fat values.D17-fat.zipD18 fat tissue segmentationEared grebe (D-18) downed in Dugway, UT, during Spring migration towards Great Salt Lake. After segmentation in Mimics, jpg files were exported with fat tissue highlighted. Images allowed landmark identification and slice range for each ROI (region of interest) - chest, thorax and abdomen. Also, a txt file with fat area measurement for each slice was generated. Depot fat measurement was calculated by matching ROI slice range and fat values.D18-fat.zipD22 fat tissue segmentationEared grebe (D-22) downed in Dugway, UT, during Spring migration towards Great Salt Lake. After segmentation in Mimics, jpg files were exported with fat tissue highlighted. Images allowed landmark identification and slice range for each ROI (region of interest) - chest, thorax and abdomen. Also, a txt file with fat area measurement for each slice was generated. Depot fat measurement was calculated by matching ROI slice range and fat values.D22-fat.zipD27 fat tissue segmentationEared grebe (D-27) downed in Dugway, UT, during Spring migration towards Great Salt Lake. After segmentation in Mimics, jpg files were exported with fat tissue highlighted. Images allowed landmark identification and slice range for each ROI (region of interest) - chest, thorax and abdomen. Also, a txt file with fat area measurement for each slice was generated. Depot fat measurement was calculated by matching ROI slice range and fat values.D27-fat.zipD34 fat tissue segmentationEared grebe (D-34) downed in Dugway, UT, during Spring migration towards Great Salt Lake. After segmentation in Mimics, jpg files were exported with fat tissue highlighted. Images allowed landmark identification and slice range for each ROI (region of interest) - chest, thorax and abdomen. Also, a txt file with fat area measurement for each slice was generated. Depot fat measurement was calculated by matching ROI slice range and fat values.D34-fat.zipD36 fat tissue segmentationEared grebe (D-36) downed in Dugway, UT, during Spring migration towards Great Salt Lake. After segmentation in Mimics, jpg files were exported with fat tissue highlighted. Images allowed landmark identification and slice range for each ROI (region of interest) - chest, thorax and abdomen. Also, a txt file with fat area measurement for each slice was generated. Depot fat measurement was calculated by matching ROI slice range and fat values.D36-fat.zipG07 fat tissue segmentationEared grebe (G-07) downed in Green River, WY, leaving breeding grounds and migrating towards Great Salt Lake. After segmentation in Mimics, jpg files were exported with fat tissue highlighted. Images allowed landmark identification and slice range for each ROI (region of interest) - chest, thorax and abdomen. Also, a txt file with fat area measurement for each slice was generated. Depot fat measurement was calculated by matching ROI slice range and fat values.G07-fat.zipG10 fat tissue segmentationEared grebe (G-10) downed in Green River, WY, leaving breeding grounds and migrating towards Great Salt Lake. After segmentation in Mimics, jpg files were exported with fat tissue highlighted. Images allowed landmark identification and slice range for each ROI (region of interest) - chest, thorax and abdomen. Also, a txt file with fat area measurement for each slice was generated. Depot fat measurement was calculated by matching ROI slice range and fat values.G10-fat.zipG12 fat tissue segmentationEared grebe (G-12) downed in Green River, WY, leaving breeding grounds and migrating towards Great Salt Lake. After segmentation in Mimics, jpg files were exported with fat tissue highlighted. Images allowed landmark identification and slice range for each ROI (region of interest) - chest, thorax and abdomen. Also, a txt file with fat area measurement for each slice was generated. Depot fat measurement was calculated by matching ROI slice range and fat values.G12-fat.zipG13 fat tissue segmentationEared grebe (G-13) downed in Green River, WY, leaving breeding grounds and migrating towards Great Salt Lake. After segmentation in Mimics, jpg files were exported with fat tissue highlighted. Images allowed landmark identification and slice range for each ROI (region of interest) - chest, thorax and abdomen. Also, a txt file with fat area measurement for each slice was generated. Depot fat measurement was calculated by matching ROI slice range and fat values.G13-fat.zipG14 fat tissue segmentationEared grebe (G-14) downed in Green River, WY, leaving breeding grounds and migrating towards Great Salt Lake. After segmentation in Mimics, jpg files were exported with fat tissue highlighted. Images allowed landmark identification and slice range for each ROI (region of interest) - chest, thorax and abdomen. Also, a txt file with fat area measurement for each slice was generated. Depot fat measurement was calculated by matching ROI slice range and fat values.G14-fat.zip