Publications

 

I. Refereed Journal Articles and Book Chapters

2015

Baker, L.L, Mills Flemming J.E., Jonsen, I.D., Ligard D.C., Iverson S.J., Bowen W.D. (2015) A novel approach to quantifying the spatiotemporal behavior of instrumented grey seals used to sample the environment. Movement Ecology 3(20). DOI: 10.1186/s40462-015-0047-4. [ PDF ]

Bowen, W.D., den Heyer C.E., McMillan J.I., Iverson S.J. (2015) Offspring size at weaning affects survival to recruitment and reproductive performance of primiparous gray seals. Ecology and Evolution 5(7): 1412-1424. DOI: 10.1002/ece3.1450. [ PDF ]

Brown T.M., Iverson S.J., Fisk A.T., MacDonald R.W., Helbing C.C., Reimer K.J. (2015) Local contamination, and not feeding preferences, explains elecated PCB concentration in Labrador ringed seals (Pusa hispida). Science of the Total Environment 515-516: 188-197. DOI: 10.1016/j.scitotenv.2015.02.019. [ PDF ]

Haynes T.B., Schmutz J.A., Bromaghin J.F., Iverson S.J., Padula V.M., Rosenberger A.E. (2015) Diet of yellow-billed loons (Gavia adamsii) in Artic lakes during the nesting season inferred from fatty acid analysis. Polar Biology 38(8): 1239-1247. DOI: 10.1007/s00300-015-1690-3. [ PDF ]

Hussey N.E., Kessel S.T., Aarestrup K., Cooke S.J., Cowley P.D., Fisk A.T., Harcourt R.G., Olland K.N., Iverson S.J., Kocik J.F., Mills Flemming J.E., Whoriskey F.G. 2015. Terrestial animal tracking as an eye on life and planet. Science 348, 1255642. DOI: 10.1126/science.1255642 [ PDF ]

Zeppelin T.K., Johnson D.S., Kuhn C.E., Iverson S.J., Ream R.R. (2015) Stable isotope models predict foraging habitat of northern fur seals (Callorhinus ursinus) in Alaska. PLoS ONE 10(6): e0127615. DOI: 10.1371/journal.pone.0127615. [ PDF ]

2014

Baker L.L., Jonsen I.D., Mills Flemming J.E., Lidgard D.C., Bowen W.D., Iverson S.J., Webber D.M. (2014) Probability of detecting marine predator-prey and species interactions using novel hybrid acoustic transmitter-receiver tags. PLoS ONE 9(6): e98117. DOI: 10.1371/journal.pone.0098117. [ PDF ]

Heaslip S.G., Bowen W.D., Iverson S.J. (2014) Testing predictions of optimal diving theory using animal-borne video from harbour seals (Phoca vitulina concolor). Canadian Journal of Zoology 92(4): 309-318. DOI: 10.1139/cjz-2013-0137. [ PDF ]

Lidgard D.C., Bowen W.D., Jonsen I.D., Iverson S.J. (2014) Predator-borne acoustic transceivers and GPS tracking reveal spatiotemporal patterns of encounters with acoustically tagged fish in the open ocean. Marine Ecology Progress Series 501:157-168. DOI: 10.3354/meps10670. [ PDF ]

Lidgard D.C., Bowen W.D., Jonsen I.D., McConnell B.J., Lovell P., Webber D.M., Stone T., Iverson S.J. (2014) Transmitting species-interaction data from animal- borne transceivers through Service Argos using Bluetooth communication. Methods in Ecology and Evolution 5(9): 864-871. DOI: 10.1111/2014-210X.12235. [ PDF ]

McKinney M.A., Atwood T., Dietz R., Sonne C., Iverson S.J., Peacock E. (2014) Validation of adipose lipid content as a body condition index for polar bears. Ecology and Evolution 4(4):516-527. DOI: 10.1002/ece3.956. [ PDF ]

Sterling J.T., Springer A.M., Iverson S.J., Johnson S.P., Pelland N.A., Johnson D.S., Lea M., Bond N.A. (2014) The sun, moon, wind, and biological imperative- shaping contrasting wintertime migration and foraging strategies of adult male and female northern fur seals (Callorhinus ursinus). PLoS ONE 9(4): e93068. DOI: 10.1371/journal.pone.0093068. [ PFD ]

Stewart C., Iverson S., Field C. (2014) Testing for a change in diet using fatty acid signatures. Environmental and Ecological Statistics 21(4): 775-792. DOI: 10.1007/s10651-014-0280-9. [ PDF ]

Wang S.W., Hollmén T.E., Iverson S.J. (2014) Egg yolk fatty acids as a proxy to quantify diets of a female Spectacled Eiders (Somateria fischeri). Canadian Journal of Zoology 92(5): 453-461. DOI: 10.1139/cjz-2013-0293. [ PDF ]

2013

publication 2McKinney, M.A., Iverson, S.J., Fisk, A.T., Sonne, C., Rigét. F.F., Letcher, R.J., Arts, M.T., Born, E.W., Rosing-Asvid, A., and Dietz, R. (in press) Global change effects on the long-term feeding ecology and contaminant exposures of East Greenland polar bears. Global Change Biology. DOI: 10.1111/gcb.12241. [ PDF ]

Noren, D.P., Budge, S.M., Iverson, SJ, Goebel, ME, Costa, DP, and Williams TM. (in press) Fatty acid mobilization and reduction in water content of blubber from northern elephant seal (Mirounga angustirostris) pups during the postweaning fast. J. Comp Physiol.

Tucker, S., Stenson, G.B., Bowen, W.D. and Iverson, S.J. (2013) Fueling phocids: Divergent exploitation of primary energy sources and parallel ontogenetic diet switches among three species of subarctic seals. Marine Mammals Science DOI: 10.1111/mms.12009. [ PDF ]

2012

Bowen, W.D. and Iverson, S.J. (2012) Methods of estimating marine mammal diets: a review of validation experiments and sources of bias and uncertainty. Marine Mammal Science DOI: 10.1111/j.1748-7692.2012.00604. [ PDF ]

Heaslip, S.G., Iverson, S.J, Bowen, W.D. and James, M.C. (2012) Jellyfish support high energy intake of leatherback sea turtles (Dermochelys coriacea): video evidence from animal-borne cameras. PLoS ONE 7(3) e33259:1-7. [ PDF ]

Karnovsky, N.J., Hobson, K.A. and Iverson, S.J. (2012) From lavage to lipids: estimating diets of seabirds. Marine Ecology Progress Series 451:263-284. [ PDF ]

Lang, S.L.C., Iverson, S.J. and Bowen, W.D (2012) Primiparous and multiparous females differ in mammary gland alveolar development: implications for milk production. Journal of Experimental Biology 215:2904-2911. [ PDF ]

Lidgard, D.C., Bowen, W.D., Jonsen, I.D. and Iverson, S.J. (2012) Animal-borne acoustic transceivers reveal patterns of at-sea associations in an upper-trophic level predator. PLoS ONE ONE 7(11): e48962. doi:10.1371/journal.pone.0048962. [ PDF ]

pup

2011

Cooke, S.J., Iverson, S.J., Stokesbury, M.J.W., Hinch, S.G., Fisk, A.T., VanderZwaag, D.L., Apostle, R. and Whoriskey, F. (2011) Ocean Tracking Network Canada: a network approach to addressing critical issues in fisheries and resource management with implications for ocean governance. Fisheries 36(12): 583-592 (feature article)PDF ]

Iverson, S.J., Piche, J. and Blanchard, W. (2011) Hawaiian monk seals and their prey. Assessing characteristics of prey species fatty acid signatures and consequences for estimating monk seal diets using quantitative fatty acid signature analysis. NOAA Technical Memorandum NMFS-PIFSC-23, March 2011 (http://www.pifsc.noaa.gov). 137 pp.

Lang, S.L.C., Boness , D.J., Bowen, W.D. and Iverson, S.J. (2011) Primiparous females do not exhibit reduced maternal care in gray seals (Halichoerus grypus). Marine Mammal Science, on-line early. [PDF]

Lang, S.L.C., Iverson, S.J. and Bowen, W.D. (2011) The influence of reproductive experience on milk energy output and lactation performance in the grey seal (Halichoerus grypus). PLoS ONE 6(5)e19487:1-11. [ PDF ]

Parrish, F.A., Howell, E.A., Antonelis, G.A., Iverson, S.J., Littnan, C.L., Parrish, J.D. and Plovina, J.J. (2011) Estimating the carrying capacity of French Frigate Shoals for the endangered Hawaiian monk seal using Ecopath with Ecosim. Marine Mammal Science (early on-line: DOI: 10.1111/j.1748-7692.2011.00502.x). [ PDF ]

Thiemann, G. W., Iverson, S. J. Stirling, I. and Obbard, M. (2011) Individual patterns of prey selection and dietary specialization in an Arctic marine carnivore. Oikos 120(10):1469-1478. [ PDF ]

2010

Boyd, I. L., Bowen, W. D. and Iverson, S. J., editors (2010) Marine Mammal Ecology and Conservation: a Handbook of Techniques. Oxford University Press, Cambridge UK. [ PDF]

Iverson, S.J., Sparling , C., Williams, T., Lang, S.L.C. and Bowen, W.D. (2010) Measuring individual and population energetics in marine mammals. pp. 165-190 in Boyd, I.L., Bowen, W.D. and Iverson, S.J., eds., Marine Mammal Ecology and Conservation: a Handbook of Techniques. Oxford University Press, Cambridge UK. [ PDF ]

Piche, J., Iverson, S.J. and Parrish, F. (2010) Characterization of forage fish and invertebrates in the Northwestern Hawaiian Islands using fatty acid signatures:  species and ecological groups. Marine Ecology Progress Series 418:1-15 (feature article) [ PDF ] [ PDF ]

Tollit , D., Pierce, G., Hobson, K., Bowen W.D. and Iverson, S.J. (2010) Measurement of diet in marine mammals. pp. 191-221 in Boyd, I.L., Bowen, W.D. and Iverson, S.J., eds., Marine Mammal Ecology and Conservation: a Handbook of Techniques. Oxford University Press, Cambridge UK. [ PDF ]

Wang, S.W., Hollmen, T.E. and Iverson, S.J. (2010) Validating quantitative fatty acid signature analysis (QFASA) to estimate diets of threatened spectacled and Steller’s eiders (Somateria fischeri and Polysticta stelleri). J Comp Physiol B 180:125-139. [ PDF ]

2009

publicationsIverson, S.J. (2009) Tracing aquatic food webs using fatty acids: from qualitative indicators to quantitative determination. pp. 281-307 in Lipids in Aquatic Ecosystems. Arts, M.T., Brett, M.T., Kainz , M.J. ( eds .). Springer, New York. [ PDF ]                      

Iverson, S.J. (2009) Blubber. pp. 115-120 in Perrin , W.F., Wursig , B. and Thewissen , H.G.M. (eds.) Encyclopedia of Marine Mammals, 2nd Edition. Academic Press, Elsevier, San Diego. [ PDF

Kelly, J.R., Scheibling, R.E., Iverson, S.J. (2009) Fatty acid tracers for native and invasive macroalgae in an experimental food web. Marine Ecology Progress Series 391:53-63. [ PDF ]

Lang, S.L.C., Iverson, S.J. and Bowen, W.D. (2009) Repeatability in components of lactation performance and the consequences for maternal reproductive success in grey seals (Halichoerus grypus). Ecology 90:2513-2523. [ PDF ]

Thiemann, G. W., Iverson, S. J. and Stirling I. (2009) Using fatty acids to study marine mammal foraging: the evidence from an extensive and growing literature. Marine Mammal Science 25:243-249. [ PDF ]

Tucker, S., Bowen, W.D., Iverson, S.J., Blanchard, W. and Stenson, G.B. (2009) Sources of variation in diets of harp (Pagophilus groenlandicus) and hooded (Cystophora cristata) seals estimated from quantitative fatty acid signature analysis (QFASA). Marine Ecology Progress Series 384: 287-302. [ PDF ] Appendix [ PDF ]

Tucker, S., Bowen, W.D., Iverson, S.J. and Stenson, G.B. (2009) Intrinsic and extrinsic sources of variation in the diets of harp (Pagophilus groenlandicus) and hooded (Cystophora cristata) seals revealed by fatty acid profiles. Canadian Journal of Zoology 87:139-151. [ PDF ]

Wang, S.W., Iverson, S.J., Springer, A.M. and Hatch, S.A. (2009) Spatial and temporal diet segregation in northern fulmars (Fulmarus glacialis) breeding in Alaska: insights from fatty acid signatures. Marine Ecology Progress Series 377: 299-307PDF ]

Williams CT, Iverson SJ, Buck CL (2009) The effects of diet and caloric restriction on adipose tissue fatty acid signatures of tufted puffin (Fratercula cirrhata) nestlings. Journal of Comparative Physiology B 179:711-720. [ PDF ]

img030 copy2008

Budge, S.M., Springer, A.M., Iverson, S.J. and Sheffield, G. (2008) Blubber fatty acid composition of bowhead whales, Balaena mysticetus: implications for diet assessment and ecosystem monitoring. Journal of Experimental Marine Biology and Ecology. 359: 40-46. [ PDF ]

Budge, S.M., Wooller, M.J., Springer, A.M., Iverson, S.J., McRoy, C.P., and Divoky, G..J. (2008) Tracing carbon flow in an arctic marine food web using fatty acid-stable isotope analysis. Oecologia 157: 117-129. [ PDF ]

Karnovsky, N. J., Hobson, K. A., Iverson, S.J., Hunt Jr., G. L. and Spear, L. B. (2008) Seasonal changes in diets of seabirds in the North Water Polynya: a multiple-indicator approach. Marine Ecology Progress Series. 357: 291-299. [ PDF ]

Kelly, J.R., Scheibling, R.E., Iverson, S.J. and Gagnon, P. (2008) Fatty acid profiles of sea urchin gonads (Strongylocentrotus droebachiensis) on natural algal diets. Marine Ecology Progress Series 371:1-9. (feature article) [ PDF ]

Nordstrom, C.A., Wilson, L.J. Iverson, S.J. and Tollit, D.J. (2008) Evaluating quantitative fatty acid signature analysis (QFASA) using harbour seals (Phoca vitulina richardsi) in captive feeding studies. Marine Ecology Progress Series 360: 245-263. [ PDF ]

Noren, S.R., Boness, D.J., Iverson, S.J., and Bowen, W.D. (2008) Body condition at weaning affects the duration of the postweaning fast in grey seal (Halichoerus grypus) pups. Physiological and Biochemical Zoology 81: 269-277. [ PDF ]

Thiemann, G. W., Iverson, S. J. and Stirling, I. (2008) Polar bear diets and Arctic marine food webs: insights from fatty acid analyses. Ecological Monographs 78: 591-613. [PDF ]

Thiemann, G. W., Iverson, S. J. and Stirling, I. (2008) Variation in blubber fatty acid composition among marine mammals in the Canadian Arctic. Marine Mammal Science 24: 91-111[ PDF ]

Tucker, S., Bowen, W.D. and Iverson, S.J. (2008) Convergence of diet estimates derived from fatty acids and stable isotopes within individual grey seals. Marine Ecology Progress Series. 354: 267-276. [ PDF ]

Williams, C.T., Iverson, S.J. and Buck, C.L. (2008) Stable isotopes and fatty acid signatures reveal age- and stage-dependent foraging niches in tufted puffins. Marine Ecology Progress Series 363:287-298. [ PDF ]

2007

pic2 copyBeck, C.A., Iverson, S.J., Bowen, W.D. and Blanchard, W. (2007) Sex differences in grey seal diet reflect seasonal variation in foraging behaviour and reproductive expenditure: evidence from quantitative fatty acid signature analysis. Journal of Animal Ecology 76: 490-502. [ PDF ]

Beck, C.A., Rea, L.D., Iverson, S.J., Kennish, J.M., Pitcher, K.W. and Fadely, B.S. (2007) Blubber fatty acid profiles reveal regional, seasonal, age-class and sex differences in the diet of young Steller sea lions in Alaska. Marine Ecology Progress Series 338: 269-280. [ PDF ]

Budge, S.M., Iverson, S.J. and Koopman, H.N. (2007) Reply to Wetzel et al.’s Comment: Identification of fatty acids by picolinyl derivatives. Marine Mammal Science 23:991-992. [ PDF ]

Budge, S.M., Springer, A.M., Iverson, S.J. and Sheffield, G. (2007) Fatty acid biomarkers reveal niche separation in an arctic benthic food web. Marine Ecology Progress Series 336: 305-309. [ PDF ]

Iverson, S. J., Springer, A. M. and Bodkin, J. (2007) Strategies for survival: marine mammals. pp 114-135 in Spies, R. (ed.) Long-term Ecological Change in the Northern Gulf of Alaska. Elsevier Press, Amsterdam.

Iverson, S.J., Springer, A.M. and Kitaysky, A.S. (2007) Seabirds as indicators of food web structure and ecosystem variability: qualitative and quantitative diet analyses using fatty acids. Marine Ecology Progress Series 352: 235-244. [ PDF ]

Springer, A.M., Byrd, G.V. and Iverson, S.J. (2007) Hot oceanography: planktivorous seabirds reveal ecosystem responses to heating of the Bering Sea. Marine Ecology Progress Series 352: 289-297. [ PDF ]

Springer, A.M., Iverson, S.J. and Bodkin, J. (2007) Long-term Change: marine mammal populations. pp 352-378 in Spies, R. (ed.) Long-term Ecological Change in the Northern Gulf of Alaska. Elsevier Press, Amsterdam.

Thiemann, G. W., Budge, S. M., Iverson, S. J. and Stirling, I. (2007) Unusual fatty acid biomarkers reveal age- and sex-specific foraging in polar bears (Ursus maritimus). Canadian Journal of Zoology 85: 505-517. [ PDF ]

Thiemann, G.W., Iverson, S.J. and Stirling, I. (2007) Variability in the blubber fatty acid composition of ringed seals (Phoca hispida) across the Canadian Arctic. Marine Mammal Science 23: 241-261. [ PDF ]

Tucker, S., Bowen, W.D. and Iverson, S.J. (2007) Dimensions of diet segregation in a marine carnivore, the grey seal, revealed through stable isotopes of carbon (d13C) and nitrogen (d15N). Marine Ecology Progress Series 339: 271-282. [ PDF ]

Wang, S.W., Iverson, S.J., Springer, A.M. and Hatch, S.A. (2007) Fatty acid signatures of stomach oil and adipose tissue of northern fulmars (Fulmarus glacialis) in Alaska: implications for diet analysis of Procellariiform birds. Journal of Comparative Physiology B 177: 893-903. [ PDF ]

2006

Austin, D., Bowen, W.D., McMillan, J.I. and Iverson, S.J. (2006) Linking movement, diving, and habitat to foraging success in a large marine predator. Ecology 87: 3095-3108. [PDF ]

Bowen, W. D., Beck, C. A., Iverson, S. J., Austin, D. and McMillan, J. I. (2006) Linking predator foraging behaviour and diet with variability in continental shelf ecosystems: grey seals of eastern Canada. Symposium of the Zoological Society of London: Conservation Biology Series 12: 63-81. [ PDF ]

Bowen, W.D., Iverson, S.J., McMillan, J.I., and Boness, D.J. (2006) Reproductive performance in grey seals: age-related improvement and senescence in a capital breeder. J. Animal Ecology 75: 1340-1351. [ PDF ]

Budge, S. M., Iverson, S. J. and Koopman, H. N. (2006) Studying trophic ecology in marine ecosystems using fatty acids: A primer on analysis and interpretation. Marine Mammal Science 22: 759-801. [ PDF ]

Cooper, M. H., Iverson, S. J. and Rouvinen-Watt, K. (2006) Metabolism of dietary cetoleic acid (22:1n-11) in mink (Mustela vison) and grey seals (Halichoerus grypus) studied using radiolabelled fatty acids. Physiological and Biochemical Zoology 79: 820-829. [ PDF ]

Iverson, S. J., Stirling, I. and Lang, S. L. C. (2006) Spatial and temporal variation in the diets of polar bears across the Canadian arctic: indicators of changes in prey populations and environment. Symposium of the Zoological Society of London: Conservation Biology Series 12: 98-117. [ PDF ]

Koopman, H. N., Budge, S. M., Ketten, D. R. and Iverson, S. J. (2006) The topographical distribution of lipids inside the mandibular fat bodies of odontocetes: remarkable complexity and consistency. IEEE Journal of Oceanic Engineering 31: 95-106. [ PDF ]

Thiemann, G.W., Iverson, S.J. and Stirling, I. (2006) Seasonal, sexual, and anatomical variability in the adipose tissue composition of polar bears (Ursus maritimus). Journal of Zoology London 269: 65-76. [ PDF ]

pic04 copy2005

Beck, C. A., Iverson, S.J. and Bowen, W.D. (2005) Blubber fatty acids of grey seals reveal sex differences in diet of a size-dimorphic marine carnivore. Canadian Journal of Zoology 83: 377-388. [ PDF ]

Cooper, M. H., Iverson, S. J. and Heras, H. (2005) Dynamics of blood chylomicron fatty acids in a marine carnivore:  implications for lipid metabolism and quantitative estimation of predator diets.  Journal of Comparative Physiology B 175: 133-145. [ PDF ]

Lang, S. L. C., Iverson, S. J., and Bowen, W. D. (2005) Individual variation in milk composition over lactation in harbour seals (Phoca vitulina) and the consequences of intermittent attendance. Canadian Journal of Zoology 83: 1525-1531. [ PDF ]

Mellish, J. E. and Iverson, S. J. (2005) Postpartum dynamics of reproductive hormones in phocid seals: lactation versus future reproduction. Marine Mammal Science 21: 162-168. [ PDF ]

Noren, S.R., Iverson, S.J. and Boness, D.J. (2005) Development of the blood and muscle oxygen stores in grey seals (Halichoerus grypus): implications for juvenile diving capacity and the necessity of a terrestrial postweaning fast. Physiological and Biochemical Zoology 78: 482-490. [ PDF ]

2004

Budge, S. M., Cooper, M. H. and Iverson, S. J. (2004) Demonstration of the deposition and modification of dietary fatty acids in pinniped blubber using radiolabelled precursors.  Physiological and Biochemical Zoology 77: 682-687. [ PDF ]

Iverson, S. J. (2004) Fat as an ecological tool: bears and seals in temperate and arctic ecosystems. Meridian, the Canadian Polar Commission, pp. 6-10. [ PDF ]

Iverson, S. J., Field, C., Bowen, W. D. and Blanchard, W. (2004) Quantitative fatty acid signature analysis: a new method of estimating predator diets. Ecological Monographs 74: 211-235. [ PDF ]

Thiemann, G.W., Budge, S.M., Bowen, W.D. and Iverson, S.J. (2004) Comment on Grahl-Nielsen et al. (2003) “Fatty acid composition of the adipose tissue of polar bears and of their prey: ringed seals, bearded seals and harp seals”. Marine Ecology Progress Series. 281: 297-301. [ PDF ]

Thiemann, G, W., Budge, S. M. and Iverson, S. J. (2004) Determining blubber fatty acid composition: a comparison of in situ direct and traditional methods. Marine Mammal Science 20: 284-295. [ PDF ]

2003

Beck, C.A., Bowen, W. D. and Iverson, S.J. (2003) Sex differences in the seasonal patterns of energy storage and expenditure in a phocid seal. Journal of Animal Ecology. 72:280-291. [ PDF ]

Beck, C. A., Bowen, W. D., McMillan, J. I. and Iverson, S. J. (2003) Sex differences in the diving behaviour of a size-dimorphic capital breeder: the grey seal. Animal Behaviour 66: 777-789. [ PDF ]

Beck, C. A., Bowen, W. D., McMillan, J. I. and Iverson, S. J. (2003) Sex differences in diving at multiple temporal scales in a size-dimorphic capital breeder. Journal of Animal Ecology 72: 979-993. [ PDF ]

Bowen, W. D., Ellis, S. L., Iverson, S. J. and Boness, D. J. (2003) Maternal and newborn life-history traits during periods of contrasting population trends: implications for explaining the decline of harbour seals, Phoca vitulina, on Sable Island. Journal of Zoology London 261: 155-163. [ PDF ]

Budge, S. M. and Iverson, S. J. (2003) Quantitative analysis of fatty acid precursors in marine samples: direct conversion of wax ester alcohols and dimethylacetals to fatty acid methyl esters. Journal of Lipid Research 44: 1802-1807. [ PDF ]

Koopman, H. N., Iverson, S. J. and Read, A. J. (2003) High concentrations of isovaleric acid in the fats of odontocetes: variation and patterns of accumulation in blubber vs. stability in the melon. Journal of Comparative Physiology 173: 247-261. [ PDF ]

Muelbert, M. M. C., Bowen, W. D. and Iverson, S. J. (2003) Weaning mass affects changes in body composition and food intake in harbour seal pups during the first month of independence. Physiological and Biochemical Zoology 76: 418-427. [ PDF ]

2002

img029 copyBudge, S. M., Iverson, S. J., Bowen, W. D. and Ackman, R. G. (2002) Among- and within-species variation in fatty acid signatures of marine fish and invertebrates on the Scotian Shelf, Georges Bank and southern Gulf of St. Lawrence. Canadian Journal of Fisheries and Aquatic Sciences 59: 886-898. [ PDF ]

Iverson, S.J. (2002) Blubber. pp. 107-112 in Perrin , W.F., Wursig , B. and Thewissen , H.G.M. (eds.) Encyclopedia of Marine Mammals. Academic Press, San Diego.

Iverson, S. J., Frost, K. J. and Lang, S. (2002) Fat content and fatty acid composition of forage fish and invertebrates in Prince William Sound, Alaska: factors contributing to among and within species variability. Marine Ecology Progress Series 241: 161-181. [ PDF ]

2001

Bowen, W. D., Ellis, S. L., Iverson, S. J. and Boness, D. J. (2001) Maternal effects on offspring growth rate and weaning mass in harbour seals. Canadian Journal of Zoology 79: 1088-1101. [ PDF ]

Bowen, W. D., Iverson, S. J., Boness, D. J. and Oftedal, O. T. (2001) Foraging effort, food intake and lactation performance depend on maternal mass in a small phocid seal. Functional Ecology 15: 325-334. [ PDF ]

Hood, W. R., Kunz, T. J., Oftedal, O. T., Iverson, S. J., LeBlanc, D.and Seyjagat, J. (2001) Interspecific and intraspecific variation in proximate, mineral, and fatty acid composition of milk in Old World fruit bats (Chiroptera: Pteropodidae). Physiological and Biochemical Zoology 74: 134-146. [ PDF ]

Hooker, S. K., Iverson, S. J., Ostrom, P. and Smith, S. C. (2001) Aspects of diet in northern bottlenose whales in the Gully as inferred through fatty acid and stable isotope analyses of biopsy samples. Canadian Journal of Zoology 79: 1442-1454. [ PDF ]

Iverson, S.J., Lang, S. and Cooper, M. (2001) Comparison of the Bligh and Dyer and Folch methods for total lipid determination in a broad range of marine tissue. Lipids 36:1283-1287. [ PDF ]

Iverson, S. J., MacDonald, J. and Smith, L. K. (2001) Changes in diet of free-ranging black bears in years of contrasting food availability revealed through milk fatty acids. Canadian Journal of Zoology 79: 2268-2279. [ PDF ]

Mellish, J. E. and Iverson, S. J. (2001) Blood metabolites as indicators of nutrient utilization in fasting, lactating phocid seals: does depletion of nutrient reserves terminate lactation? Canadian Journal of Zoology 79: 303-311. [ PDF ]

fat seal2000

Alston-Mills, B., Iverson, S. J., and Thompson, M. P. (2000) A comparison of the composition of milks from Meishan and crossbred pigs. Livestock Production Science. 63: 85-91. [PDF ]

Beck, C.A., Bowen, W. D. and Iverson, S. J. (2000) Seasonal changes in buoyancy and diving behaviour of adult grey seals. Journal of Experimental Biology 203: 2323-2330. [ PDF ]

Ellis, S. L., Bowen, W. D., Boness, D. J. and Iverson, S. J. (2000) Maternal effects on offspring mass and stage of development at birth in the harbour seal, Phoca vitulina. Journal of Mammalogy 81: 1143-1156. [ PDF ]

Kirsch, P. E., Iverson, S. J. and Bowen W. D.  (2000) Effect of a low-fat diet on body composition and blubber fatty acids in captive harp seals (Phoca groenlandica). Physiological and Biochemical Zoology 73: 45-59. [ PDF ]

Layton, H., Rouvinen, K. and Iverson, S. J. (2000) Body composition in mink (Mustela vison) kits during 21-42 days postpartum using estimates of hydrogen isotope dilution and direct carcass analysis. Comparative Biochemistry and Physiology A 126: 295-303. [ PDF ]

Logan, M. S., Iverson, S. J., Ruzzante, D. E., Walde, S. J., Machi, P. J., Alonso, M. F. and Cussac, V. E. (2000) Long term diet differences between morphs in trophically polymorphic Percichthys trucha populations from the southern Andes.  Biological Journal of the Linnean Society 69: 599-616. [ PDF ]

Mellish, J. E., Iverson, S. J. and Bowen, W. D. (2000) Metabolic compensation during high energy output in fasting, lactating grey seals (Halichoerus grypus): metabolic ceilings revisited. Proceedings of the Royal Society, London B 267: 1245-1251. [PDF ]

1999

Bowen, W. D., Beck, C. A. and Iverson, S. J. (1999) Bioelectrical impedance analysis as a means of estimating total body water in grey seals. Canadian Journal of Zoology 77: 418-422. [ PDF ]

Bowen, W. D., Boness, D. J. and Iverson, S. J. (1999) Diving behaviour of lactating harbour seal females and their pups during maternal foraging trips. Canadian Journal of Zoology 77: 978-988. [ PDF ]

Mellish, J. E., Iverson, S. J. and Bowen, W. D. (1999) Individual variation in maternal energy allocation and milk production in grey seals and consequences for pup growth and weaning characteristics. Physiological and Biochemical Zoology 67:677-690. [PDF ]

Mellish, J. E., Iverson, S. J., Bowen, W. D. and Hammill, M. O. (1999) Fat transfer and energetics during lactation in the hooded seal: the roles of tissue lipoprotein lipase in milk fat secretion and pup blubber deposition. Journal of Comparative Physiology B 169: 377-390. [ PDF ]

Smith, S., Iverson, S. J. and Bowen, W. D. (1999) Reply; Fatty acid signatures and classification trees:  new tools for investigating the foraging ecology of seals. Canadian Journal of Fisheries and Aquatic Sciences 56: 2224-2226. [ PDF ]

1998

Bowen, W. D., Boness D. J. and Iverson, S. J. (1998) Estimation of body water in harbour seals:  how useful is bioelectrical impedance analysis? Marine Mammal Science 14: 765-777. [ PDF ]

Bowen, W. D. and Iverson, S. J. (1998) Estimation of total body water in pinnipeds using hydrogen-isotope dilution. Physiological Zoology 71: 329-332. [ PDF ]

Coltman, D., Bowen, W. D., Iverson, S. J. and Boness, D. J. (1998) The energetics of male reproduction in an aquatically mating pinniped: the harbour seal. Physiol. Zool. 71: 387-399. [ PDF ]

Kirsch, P. E., Iverson, S. J., Bowen, W. D., Kerr, S. and Ackman, R. G. (1998) Dietary effects on the fatty acid signatures of whole Atlantic cod (Gadus morhua). Canadian Journal of Fisheries and Aquatic Sciences 55:1378-1386. [ PDF ]

1997

Coltman, D., Bowen, W. D., Boness, D. J. and Iverson, S. J. (1997) Balancing foraging and reproduction in the male harbour seal:  an aquatically mating pinniped.  Animal Behaviour 54: 663-678. [ PDF ]

Iverson, S. J., Arnould, J. P. Y. and Boyd, I. L. (1997) Milk fatty acid signatures indicate both major and minor shifts in diet of lactating Antarctic fur seals. Canadian Journal of Zoology 75: 188-197. [ PDF ]

Iverson, S. J., Frost, K. J. and Lowry, L. L. (1997) Fatty acid signatures reveal fine scale structure of foraging distribution of harbor seals and their prey in Prince William Sound, Alaska. Marine Ecology Progress Series 151: 255-271. [ PDF ]

Smith, S., Iverson, S. J. and Bowen, W. D. (1997) Fatty acid signatures and classification trees:  new tools for investigating the foraging ecology of seals. Canadian Journal of Fisheries and Aquatic Sciences 54: 1377-1386. [ PDF ]

1993 – 1996

sara publicationsKoopman, H. N., Iverson, S. J. and Gaskin, D. E. (1996) Stratification and age-related differences in blubber fatty acids of the male harbour porpoise (phocoena phocoena).  Journal of Comparative Physiology 165: 628-639. [ PDF ]

Boness, D. J., Bowen, W. D. and Iverson, S. J. (1995) Does male harassment of females contribute to reproductive synchrony in the grey seal by affecting maternal performance?  Behavioral Ecology and Sociobiology 36: 1-10.

Iverson, S. J., Hamosh, M. and Bowen, W. D. (1995). Lipoprotein lipase activity and its relationship to high milk fat transfer during lactation in grey seals. Journal of Comparative Physiology 165: 384-395. [ PDF ]

Iverson, S.J. and Oftedal , O.T. (1995) Phylogenetic and ecological variation in the fatty acid composition of milks. pp 789-827 in Jensen, R.G. (ed.) The Handbook of Milk Composition. Academic Press, Inc., Orlando.

Iverson, S. J., Oftedal, O. T., Bowen, W. D., Boness, D. J. and Sampugna, J. (1995) Prenatal and postnatal transfer of fatty acids from mother to pup in the hooded seal. Journal of Comparative Physiology 165: 1-12.[ PDF ]

Oftedal , O.T. and Iverson, S.J. (1995) Phylogenetic variation in the gross composition of milks. pp 749-789 in Jensen, R.G., Thompson, M.P. and Jenness , R. (eds.) The Handbook of Milk Composition. Academic Press, Inc., Orlando.

Bowen, W. D., Oftedal, O. T., Boness, D. J. and Iverson. S. J. (1994) The effect of maternal age and other factors on birth mass in harbour seals. Canadian Journal of Zoology 72: 8-14. [ PDF ]

Hamosh, M., Iverson, S. J., Kirk, C, K, and Hamosh, P. (1994) Milk lipids and neonatal fat digestion: relationship between fatty acid composition, endogenous and exogenous digestive enzymes and digestion of milk fat. World Rev. Nutr. Diet 75: 86-91.

Iverson, S. J. (1993) Milk secretion in marine mammals in relation to foraging: can milk fatty acids predict diet? Symposium of the Zoological Society of London, 66: 263-291. [PDF ]

Iverson, S. J., Bowen, W. D., Boness, D. J. and Oftedal, O. T. (1993) The effect of maternal size and milk energy output on pup growth in grey seals (Halichoerus grypus). Physiological Zoology 66: 61-88. [ PDF ] [ PDF]

1987 – 1992

Boness, D. J., Bowen, W. D., Iverson, S. J. and Oftedal, O. T. (1992) Influence of storms and maternal size on mother-pup separations and fostering in the harbor seal, Phoca vitulina.  Canadian Journal of Zoology 70: 1640-1644. [ PDF ]

Iverson, S.J., Kirk, C.L. and Hamosh M. (1992) Digestion of milk fat in the newborn: in vitro studies greatly underestimate the in vivo extent of intragastric lipolysis . pp 401-407 in Picciano , M.F. and Walsh, M. (eds.) Mechanisms Regulating Lactation and Infant Nutrient Utilization. John Wiley & Sons, Inc., NY.

Iverson, S. J. and Oftedal, O. T. (1992) Fatty acid composition of black bear (Ursus americanus) milk during and after the period of winter dormancy. Lipids 27: 940-943. [ PDF ]

Iverson, S. J., Sampugna, J. and Oftedal, O. T. (1992) Positional specificity of gastric hydrolysis of n-3 polyunsaturated fatty acids of seal milk triglycerides. Lipids 27: 870-878. [ PDF ]

Iverson, S. J., Kirk, C. L., Hamosh, M. and Newsome, J. (1991) Milk lipid digestion in the neonatal dog:  the combined actions of gastric and bile salt stimulated lipases. Biochimica et Biophysica Acta 1083: 109-119. [ PDF – abstract ]

Iverson, S.J., Oftedal , O.T. and Boness, D.J. (1991) The effects of El Nino on pup development in the California sea lion ( Zalophus californianus ). 2. Milk intake. pp. 180-184 in Trillmich , F. and Ono, K.A. (eds.) Ecological Studies: Pinnipeds and El Nino. Springer- Verlag , Berlin Heidelberg.

Kirk, C. L., Iverson, S. J. and Hamosh, M. (1991) Lipase and pepsin activities in the stomach mucosa of the suckling dog. Biology of the Neonate 59:78-85.

Oftedal , O.T. and Iverson, S.J. (1987) Hydrogen isotope methodology for measurement of milk intake and energetics of growth in suckling pinnipeds . pp. 67 – 96 in Huntley, A.C., Costa, D.P., Worthy, G.A.J. and Castellini , M.A. (eds.) Approaches to Marine Mammal Energetics . Society for Marine Mammalogy Special Publication No. 1. Allen Press, Lawrence, KS.

Oftedal, O. T., Iverson S. J. and Boness, D. J. (1987) Milk and energy intakes of suckling California sea lion (Zalophus californianus) pups in relation to sex, growth and predicted maintenance requirements. Physiological Zoology 60: 560-575. [ PDF ]

pic5 copyII. Other Publications, Proceedings and Reports

Wang, S.W., Hollmen, T.E. and Iverson, S.J. (2009) Estimating diets of two species of threatened sea ducks, the Steller’s eider (Polysticta stelleri) and the spectacled eider (Somateria fischeri): validation of novel diet assessment techniques. North Pacific Research Board Final Report 724, 56 p.

Springer, A.M., Iverson S.J. and Kitaysky, A.S. (2008) Regime Forcing and Ecosystem Response in the Bering Sea (ReFER): Phase II. NPRB Project No. 320 Final Report. 160 pp.

Springer, A.M., Ream, R.R. and Iverson, S.J. (2008) Seasonal foraging strategies and consequences for northern fur seals at colonies with opposite population trends – Year 2. North Pacific Research Board Final Report Project 514, 65 p.

Iverson, S.J. (2007) Milk composition and lactation strategies across mammalian taxa: implications for hand-rearing neonates. Proceedings of the Nutrition Advisory Group. Seventh Conference on Zoo and Wildlife Nutrition: 1-7.

Iverson, S.J., Piche, J. and Blanchard, W. (2006) Hawaiian monk seals and their prey in the Northwestern Hawaiian Islands: assessing characteristics of prey species fatty acid signatures and consequences for estimating monk seal diets using quantitative fatty acid signature analysis (QFASA). NOAA/NMFS Report, Honolulu, HA. 146 pp.

Banks, A., Iverson, S.J., Springer, A.M., Ream, R.R., Sterling, J. and Fadely, B. (2005) Consequences of Fur Seal Foraging Strategies (COFFS). North Pacific Research Board Final Project Report, 16 pp.

Iverson, S. J. (2004) Fat as an ecological tool: bears and seals in temperate and arctic ecosystems. Meridian, the Canadian Polar Commission, pp. 6-10.

Iverson, S. J., Stewart, B. S. and Yochem, P. K. (2003) Captive Validation and Calibration of Fatty Acid Signatures in Blubber as Indicators of Prey in Hawaiian Monk Seal Diet.  NOAA Technical Report, San Diego, CA, 22 pp.

Iverson, S. J. and Springer, A. M. (2002) Estimating Seabird Diets Using Fatty Acids: Protocol Development and Testing of ReFER Hypotheses. Report to the National Pacific Marine Research Program, University of Alaska, Fairbanks, 27 pp.

Iverson, S.J. and Beck, C. A. (2002) Hawaiian monk seals and prey species in the Northwest Hawaiian Islands: Report on quantitative fatty acid signature analysis. NMFS, NOAA, Honolulu, Hawaii, April 2002. 150 pp.

Iverson, S. J. (2000) Hawaiian monk seals and prey species in the Northwestern Hawaiian Islands: report on quantitative fatty acid signature analysis. NOAA technical report, Honolulu, HA. 90 pp.

Iverson, S. J., Lang, S. L. C. and Thiemann, G. W. (2000) Hawaiian monk seals and prey species in the Northwestern Hawaiian Islands: addendum to the May 2000 report on quantitative fatty acid signature analyses. NOAA technical report, Honolulu, Hawaii. 50 pp.

398 copy copyIverson, S. J., K. J. Frost and S. Lang. (1999) The use of fatty acid signatures to investigate foraging ecology and food webs in Prince William Sound, Alaska:  harbor seals and their prey.  Pages 39-101 in Monitoring, habitat use, and trophic interactions of harbor seals in Prince William Sound, Alaska. Annual Report to the Exxon Valdez Oil Spill Trustee Council. Restoration Study 98064. Alaska Department of Fish and Game, Division of Wildlife Conservation, Fairbanks, AK.

Springer, A., Baily, K., Bowen, W. D., Boyd, I., Estes, J., Iverson, S. J., and Piatt, J. (1999) Steller sea lion Feeding Ecology Workshop Review. Seattle, WA, Feb. 1999: 40 pp.

Williams, T. M., Boness, D. J., Bowen, W. D., Boyd, I., Croll, D., Horning, M., Iverson, S. J., Calkins, D. and Didier, A. (1999) Steller sea lion Physiology Workshop Review. Seattle, WA, Feb. 1999: 34 pp.

Iverson, S. J. (1998) Results of fatty acid signature analyses of Hawaiian monk seals and potential prey species. NOAA technical report, Honolulu, HA. 45pp.

Frost, K. A., Lowry, L. L., Ver Hoef, J. M., Iverson, S. J. and Gotthardt (1998) Monitoring, habitat use, and trophic interactions of harbor seals in Prince William Sound, Alaska. Exxon Valdez Oil Spill Restoration Project Annual Report (Restoration Study 97064), Fairbanks, Alaska, 149 pp.

Iverson, S. J., Frost, K. A., Lang, S. Field, C. and Blanchard, W. (1998) The use of fatty acid signatures to investigate foraging ecology and food webs in Prince William Sound, Alaska:  Harbour seals and their prey. Exxon Valdez Oil Spill Restoration Project Annual Report (Restoration Project 97064), Fairbanks, Alaska, Appendix A., 82 pp.

Baker, J., Becker, P., Boveng, P., Frost, K., Iverson S., et. al. (1997) Harbor seal investigations in Alaska. Annual Report, NOAA Grant NA57FX0367, 291 pp.

Frost, K. A., Lowry, L. L., Ver Hoef, J. M. and Iverson, S. J. (1997) Monitoring, habitat use, and trophic interactions of harbor seals in Prince William Sound, Alaska. Exxon Valdez Oil Spill Restoration Project Annual Report (Restoration Study 96064), Fairbanks, Alaska, 114 pp.

Hammill, M. O., Kingsley, M. C. S., Lesage, V. and Iverson, S. J. (1997) Assessing diet in beluga and harbour seals using stable isotopes and fatty acid composition of the blubber.  Annual Report, Parks Canada.

Frost, K. A., Lowry, L. L., Small, R. J. and Iverson, S. J. (1996) Monitoring, habitat use, and trophic interactions of harbor seals in Prince William Sound, Alaska. Exxon Valdez Oil Spill Restoration Project Annual Report (Restoration Project 95064), Fairbanks, Alaska, 87 pp.

Iverson, S. J. and Frost, K. A. (1996) The use of fatty acid signatures to investigate foraging ecology and food webs in Prince William Sound, Alaska: Harbor seals and their prey.  Exxon Valdez Oil Spill Restoration Project Annual Report (Restoration Project 95064), Fairbanks, Alaska, Appendix A., 44 pp.

Ono, K. A., Boness, D. J., Oftedal, O. T. and Iverson, S. J. (1993) The effects of El Nino on mother-pup biology in the California sea lion. Recent Advances in California Islands Research: Proceedings of the Third California Islands Symposium.

Hamosh, M., Iverson, S. J., Mehta, N. R., Spear, M. L. and Bitman, J. (1992) Lipids in human milk and their digestion by the newborn infant. in J. Ghisolfi and G. Putet, eds., Essential Fatty Acids and Infant Nutrition. John Libbey Eurotext, Paris.

Boness, D. J., Oftedal, O. T., Ono, K. A. and Iverson, S. J. (1983) Maternal investment, lactation and pup development in the California sea lion on San Nicolas Island: some preliminary results. In Biennial Mugu Lagoon/ San Nicolas Island Ecological Research Symposium, 1983.

Iverson, S. J. (1985) California sea lions: a report from the field. Zoogoer 14: 10-15.

Iverson, S. J. (1982) Breeding white tigers. Zoogoer 11: 5-12.