Developmental changes in the resting strategies of killer whale mothers and their calves in managed care from birth to 36 months

in Behaviour
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The development of cetacean sleep has not been explored fully. Questions such as whether cetacean mothers regulate their offspring’s resting behaviour and do resting behaviours change over the course of cetacean development remain unanswered. To address these questions, an investigation of the resting strategies and activity levels for four killer whale (Orcinus orca) calves and their mothers in managed care during free-swim conditions was conducted during the first three years of life. A series of interrelated hypotheses were assessed using three independent sets of archived data (24 h behaviour records, video recordings, and instantaneous sampling) collected from two facilities. Together, the results indicated that mothers adjusted their activity levels based on their calves’ current level of development. Floating, often a preferred resting behaviour, was rarely observed during the first post-parturition month for any of the mother–calf pairs. Rather, the mother–calf pairs tended to display fast-moving mother–calf swims with frequent trajectory changes as the calf gained swimming proficiency. Although floating occurred more frequently over time for all pairs, all four killer whale mother–calf pairs displayed a preference for a slower-paced pattern swim (i.e., swim-rest). Calves preferred to rest with their mothers over resting with others or independently. The similarities in resting strategies displayed by the killer whale mother–calf pairs housed in independent facilities without temporal overlap emphasizes the conserved nature and development of these strategies in a precocial cetacean species with extended maternal care.

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References

AsperE.D.YoungW.G.WalshM.T. (1988). Observations on the birth and development of a captive-born killer whale. — Int. Zoo Yb. 27: 295-304.

BairdR.W. (2000). The killer whale: foraging specializations and group hunting. — In: Cetacean societies: field studies of dolphins and whales ( MannJ.ConnorR.C.TyackP.L.WhiteheadH., eds). The University of Chicago Press, Chicago, IL, p.  127-153.

CockcroftV.RossG.J.B. (1990). Observations on the early development of a captive bottlenose dolphin calf. — In: The bottlenose dolphin ( LeatherwoodS.ReevesR.R., eds). Academic Press, San Diego, CA, p.  461-478.

FlaniganW.F. (1974). Nocturnal behavior of captive small cetaceans. I: the bottlenosed porpoise, Tursiops truncatus. — J. Sleep Res. 3: 84.

FordJ.K.B. (2002). Killer whale Orcinus orca. — In: Encyclopedia of marine mammals ( PerrinW.F.WursigB.ThewissenJ.G.M., eds). Academic Press, New York, NY, p.  669-676.

FosterE.A.FranksD.W.MazziS.DardenS.K.BalcombK.C.FordJ.K.CroftD.P. (2012). Adaptive prolonged postreproductive life span in killer whales. — Science 337: 1313.

GibsonQ.A.MannJ. (2008). Early social development in wild bottlenose dolphins: sex differences, individual variation and maternal influence. — Anim. Behav. 76: 375-387.

GnoneG.BenoldiC.BonsignoriB.FognaniP. (2001). Observations of rest behaviors in captive bottlenose dolphins (Tursiops truncatus). — Aquat. Mamm. 27: 29-33.

GnoneG.MoriconiT.GambiniG. (2006). Activity and sleep in dolphins. — Nature 441: E10-E11.

GoleyP.D. (1999). Behavioral aspects of sleep in Pacific white-sided dolphins (Lagenorhynchus obliquidens, Gill 1865) 1. — Mar. Mamm. Sci. 15: 1054-1064.

GreeneW.E.Melillo-SweetingK.DudzinskiK.M. (2011). Comparing object play in captive and wild dolphins. — Int. J. Comp. Psychol. 24: 292-306.

GuarinoS.HillH.SigmanJ. (2016). Development of sociality and emergence of independence in a killer whale calf (Orcinus orca). — Zoo Biol. 36: 11-20.

GubbinsC.McCowanB.LynnS.HooperS.ReissD. (1999). Mother-infant spatial relations in captive bottlenose dolphins, Tursiops truncatus. — Mar. Mamm. Sci. 15: 751-765.

HighfillL.E.KuczajS.A.II (2007). Do bottlenose dolphins (Tursiops truncatus) have distinct and stable personalities?Aquat. Mamm. 33: 380-389.

HillH. (2009). The behavioral development of two beluga calves during the first year of life. — Int. J. Comp. Psychol. 22: 234-253.

HillH.CampbellC. (2014). The frequency and nature of allocare by a group of belugas (Delphinapterus leucas) in human care. — Int. J. Comp. Psychol. 27: 501-514.

HillH.GreerT.SolangiM.KuczajS.A. (2007). All mothers are not the same: maternal styles in bottlenose dolphins (Tursiops truncatus). — Int. J. Comp. Psychol. 20: 35-54.

HillH.CarderD.A.RidgwayS.H. (2008). Vigilance in female bottlenose dolphins (Tursiops sp.) before and after calving. — Int. J. Comp. Psychol. 21: 35-57.

HillH.CampbellC.DaltonL.OsbornS. (2013). The first year of behavioral development and maternal care of beluga (Delphinapterus leucas) calves in human care. — Zoo Biol. 32: 565-570.

KrasnovaV.V.Bel’kovichV.M.ChernetskyA.D. (2006). Mother-infant spatial relations in wild beluga (Delphinapterus leucas) during postnatal development under natural conditions. — Biol. Bull. 33: 53-58.

KrasnovaV.V.Bel’kovichV.M.ChernetskyA.D. (2009). Formation of behavior in the White Sea beluga calf, Delphinapterus leucas, during early postnatal ontogenesis. — Russ. J. Mar. Biol. 35: 53-59.

KuczajS.A.IIEskelinenH.C.JonesB.L.Borger-TurnerJ.L. (2015). Gotta go, mom’s calling: dolphin (Tursiops truncatus) mothers use individually distinctive acoustic signals to call their calves. — Anim. Behav. Cogn. 2: 88-95.

LyaminO.PryaslovaJ.LanceV.SiegelJ. (2005). Animal behaviour: continuous activity in cetaceans after birth. — Nature 435: 1177.

LyaminO.PryaslovaJ.KosenkoP.SiegelJ. (2007). Behavioral aspects of sleep in bottlenose dolphin mothers and their calves. — Physiol. Behav. 92: 725-733.

LyaminO.I.MangerP.R.RidgwayS.H.MukhametovL.M.SiegelJ.M. (2008). Cetacean sleep: an unusual form of mammalian sleep. — Neurosci. Biobehav. Rev. 32: 1451-1484.

MannJ.ConnorR.C.BarreL.M.HeithausM.R. (2000). Female reproductive success in bottlenose dolphins (Tursiops sp.): life history, habitat, provisioning, and group-size effects. — Behav. Ecol. 11: 210-219.

MannJ.SmutsB. (1998). Natal attraction: allomaternal care and mother-infant separations in wild bottlenose dolphins. — Anim. Behav. 55: 1097-1113.

MannJ.SmutsB. (1999). Behavioural development in wild bottlenose dolphin newborns (Tursiops sp.). — Behaviour 136: 529-566.

MannJ.Watson-CappsJ.J. (2005). Surviving at sea: ecological and behavioural predictors of calf mortality in Indian Ocean bottlenose dolphins, Tursiops sp.Anim. Behav. 69: 899-909.

McBrideA.KritzlerH. (1951). Observations of pregnancy, parturition, and post-natal behavior in the bottlenose dolphin. — J. Mammal. 32: 251-266.

McCormickJ.G. (1969). Relationship of sleep, respiration, and anesthesia in the porpoise: a preliminary report. — Proc. Natl. Acad. Sci. USA 62: 697-703.

MilesJ.A.HerzingD.L. (2003). Underwater analysis of the behavioural development of free-ranging Atlantic spotted dolphin (Stenella frontalis) calves (birth to 4 years of age). — Aquat. Mamm. 29: 363-377.

MukhametovL.M. (1984). Sleep in marine mammals. — Exp. Brain Res. Suppl. 8: 227-238.

NorenS.R. (2008). Infant carrying behaviour in dolphins: costly parental care in an aquatic environment. — Funct. Ecol. 22: 284-288.

NorenS.R.EdwardsE.F. (2011). Infant position in mother–calf dolphin pairs: formation locomotion with hydrodynamic benefits. — Mar. Ecol. Progr. Ser. 424: 229-236.

NorenS.R.BiedenbachG.EdwardsE.F. (2006). Ontogeny of swim performance and mechanics in bottlenose dolphins (Tursiops truncatus). — J. Exp. Biol. 209: 4724-4731.

NorenS.R.RedfernJ.V.EdwardsE.F. (2011). Pregnancy is a drag: hydrodynamics, kinematics and performance in pre-and post-parturition bottlenose dolphins (Tursiops truncatus). — J. Exp. Biol. 214: 4151-4159.

NorrisK.S.WursigB.WellsR.S.WursigM. (1994). The Hawaiian spinner dolphin. — University of California Press, Berkeley, CA.

OlesiukP.F.EllisG.M.FordJ.K. (2005). Life history and population dynamics of northern resident killer whales (Orcinus orca) in British Columbia. — Canadian Science Advisory Secretariat Research Document 2005/045. Fisheries and Oceans Canada, Pacific Biological Station, Nanaimo, BC.

ReidK.MannJ.WeinerJ.R.HeckerN. (1995). Infant development of two aquarium bottlenose dolphins. — Zoo Biol. 14: 135-147.

RidgwayS.H. (2002). Asymmetry and symmetry in brain waves from dolphin left and right hemispheres: some observations after anesthesia, during quiescent hanging behavior, and during visual obstruction. — Brain Behav. Evol. 60: 265-274.

SekiguchiY.KohshimaS. (2003). Resting behaviors of captive bottlenose dolphins (Tursiops truncatus). — Phys. Behav. 79: 643-653.

SekiguchiY.AraiK.KohshimaS. (2006). Sleep behaviour: sleep in continuously active dolphins. — Nature 441: E9-E11.

SiegelJ.M. (2005). Clues to the functions of mammalian sleep. — Nature 431: 1264-1271.

TriversR.L. (1974). Parent-offspring conflict. — Am. Zool. 14: 249-264.

WeihsD. (2004). The hydrodynamics of dolphin drafting. — J. Biol. 3: 1-23.

Figures

  • Changes in activity level swims from 1 month pre-parturition to 1 month post-parturition using 24 h behavioural observation instantaneous sampling data from Facility A. The graph represents the estimated mean percent of time the killer whale mother spent at each activity level 1 month before birth as compared to the estimated mean percent of time the killer whale mother–calf pair spent at each activity level during the first month after the birth of the calf.

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  • Changes in activity level swims according to time of day (AM vs PM) for the pregnant female killer whale 1 month pre-parturition (a) and for the killer whale mother–calf pair 1 month post-parturition (b) at Facility A. The y-axis indicates the mean percent of time the mother (a) or the mother–calf pair (b) spent swimming at each activity level.

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  • Mean percent of time the killer whale mother–calf pair at Facility A spent swimming at each activity level over the first 7 weeks post-parturition.

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  • Developmental changes for mother–calf and independent calf swims at Facility A at 6 month intervals from 1 month until 36 months post-parturition. (a) Mean percent of time the calf spent swimming with her mother at each activity level. (b) Mean percent of time the calf spent swimming independently at each activity level.

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  • Developmental changes in estimated mean percent of time 3 killer whale calves at Facility B spent swimming at each activity level at 6 month intervals from 1 month until 36 months post-parturition.

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  • Estimated mean percent of time 3 killer whale calves at Facility B spent swimming at each activity level every month for the first year of life.

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