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Social organization and kinship in the polygynous bat Phyllostomus hastatus

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Summary

  1. 1.

    Social behavior in the bat Phyllostomus hastatus was examined in Trinidad, W.I. over a 26-month period. The studies included (a) long-term observations on marked individuals, (b) the use of allozyme polymorphisms to estimate paternity and the genetic relationships among individuals in social groups, and (c) the investigation of foraging behavior by radio-tracking.

  2. 2.

    Day-roosting cave colonies of this bat are subdivided into highly stable, compact clusters of adult females (mean cluster size=17.9±5.1 females) and less stable bachelor groups. Female clusters are always tended by a single adult male and genetic tests demonstrated that these harem males father most or all of the babies born to the females in clusters. Harem males actively defend female clusters from other males in the roost.

  3. 3.

    Membership in female clusters is extremely stable and the same individuals roost together for years at a time. Harem male tenure can also be very long and several males retained residence in harems through a minimum of three annual reproductive periods. However, harem male turnovers were also frequently observed and in no instance did a change in males result in disruption of the female roosting cluster. Experimentally disrupted harems reconstituted their original memberships even in the absence of males.

  4. 4.

    These stable female clusters are not matrilineal kin groups. Juveniles of both sexes disperse and are not recruited into parental social units. New stable female clusters were formed as cohorts of yearling females drawn from different harems and cave colonies. This was corroborated by independent studies on the age structure of harems. Genetic tests showed that the females comprising any cluster were a genetically random sample of the total adult population.

  5. 5.

    Radio-tracking revealed that each individual has its own foraging area that it utilizes throughout the year. The foraging areas of females belonging to the same cluster were adjacent to one another and apparently segregated into larger cluster-specific areas. Females occasionally foraged within the areas of other females in their roosting cluster, but females from different clusters did not forage near one another. Harem males did not defend female foraging areas and in fact foraged in areas well apart from their harem females.

  6. 6.

    These compact and stable female roosting clusters are the fundamental unit of P. hastatus' social organization, and apparently they facilitate a male strategy of female-defense polygamy. We hypothesize that these stable clusters arise from active cooperative interactions among females on the foraging grounds. The most likely form of cooperation is the sharing of unpredictable food sources among cluster members. In P. hastatus, such behavior has not evolved through nepotism or processes of group selection that require high group stability. All of our observations and the basic biology of this bat suggest that reciprocity is the most likely means by which the system operates. Mutualism and weak altruism may play secondary roles but cannot be evaluated without additional field study.

  7. 7.

    Bachelor groups appear to be much less structured than female clusters, and the possibility of cooperation among bachelors is still open to study.

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References

  • Beard JS (1946) The natural vegetation of Trinidad. Oxford For Mem 20:1–152

    Google Scholar 

  • Bell G (1978) Group selection and structured populations. Am Nat 112:389–399

    Google Scholar 

  • Bertram BCR (1975) Social factors influencing reproduction in wild lions. J Zool London 177:463–482

    Google Scholar 

  • Bertram BCR (1976) Kin selection in lions and in evolution. In: Bateson PPG, Hinde RA (eds) Growing points of ethology. Cambridge University Press, Cambridge, pp 281–301

    Google Scholar 

  • Bertram BRC (1978) Living in groups: predators and prey. In: Krebs JR, Davies NB (eds) Behavioral ecology: An evolutionary approach, chap 3. Blackwell, Oxford

    Google Scholar 

  • Bhatnagar KP, Kallen FC (1974) Cribiform plate of ethmoid, olfactory bulb and olfactory acuity in forty species of bats. J Morphol 142:71–90

    Google Scholar 

  • Bradbury JW (1977a) Social organization and communication. In: Wimsatt WA (ed) The biology of bats, vol III, chap 1. Academic Press, New York

    Google Scholar 

  • Bradbury JW (1977b) Lek mating behavior in the hammer-headed bat. Z Tierpsychol 45:225–255

    Google Scholar 

  • Bradbury JW, Emmons LH (1974) Social organization of some Trinidad bats. I. Emballonuridae. Z Tierpsychol 36:137–183

    Google Scholar 

  • Bradbury JW, Vehrencamp SL (1976a) Social organization and foraging in emballonurid bats. I. Field studies. Behav Ecol Sociobiol 1:337–381

    Google Scholar 

  • Bradbury JW, Vehrencamp SL (1976b) Social organization and foraging in emballonurid bats. II. A model for the determination of group size. Behav Ecol Sociobiol 1:383–404

    Google Scholar 

  • Bradbury JW, Vehrencamp SL (1977a) Social organization and foraging in emballonurid bats. III. Mating systems. Behav Ecol Sociobiol 2:1–17

    Google Scholar 

  • Bradbury JW, Vehrencamp SL (1977b) Social organization and foraging in emballonurid bats. IV. Parental investment patterns. Behav Ecol Sociobiol 2:19–29

    Google Scholar 

  • Brewer GJ (1970) An introduction to isozyme techniques. Academic Press, New York

    Google Scholar 

  • Brown JL (1978) Avian communal breeding systems. Annu Rev Ecol Syst 9:123–155

    Google Scholar 

  • Bush GL (1975) Modes of animal speciation. Annu Rev Ecol Syst 6:339–364

    Google Scholar 

  • Bush GL, Case SM, Wilson AC, Patton JL (1977) Rapid speciation and chromosomal evolution in mammals. PNAS 74:3942–3946

    Google Scholar 

  • Charlesworth B (1979) A note on the evolution of altruism in structured demes. Am Nat 113:601–605

    Google Scholar 

  • Chepko-Sade BD, Sade DS (1979) Patterns of group splitting within matrilineal kinship groups. Behav Ecol Sociobiol 5:68–86

    Google Scholar 

  • Clutton-Brock TH, Harvey PH (1977) Primate ecology and social organization. J Zool London 183:1–39

    Google Scholar 

  • Cochran WW (1967) 145–160 MH7 beacon (tag) transmitter for small animals. AIBS-BIAC Information Module M-15. AIBS Bioinstrumentation Advisory Council, Washington, DC

    Google Scholar 

  • Cohen D, Eshel I (1976) On the founder effect and the evolution of altruistic traits. Theor Popul Biol 10:276–302

    Google Scholar 

  • Eberhard MJW (1975) The evolution of social behavior by kin selection. Q Rev Biol 50:1–33

    Google Scholar 

  • Eisenberg J (1966) The social organization of mammals. Handb Zool 10:1–92

    Google Scholar 

  • Emlen ST, Oring LW (1977) Ecology, sexual selection, and the evolution of mating systems. Science 197:215–223

    Google Scholar 

  • ffrench R (1973) A guide to the birds of Trinidad and Tobago. Livingston Publishing, Wynnewood, PA

    Google Scholar 

  • Goodwin GG, Greenhall AM (1961) A review of the bats of Trinidad and Tobago. Bull Am Mus Nat Hist 122:195–301

    Google Scholar 

  • Hamilton WD (1964) The genetical evolution of social behavior. J Theor Biol 7:1–16

    Google Scholar 

  • Harcourt AH (1979) Social relationships among adult female mountain gorillas. Anim Behav 27:251–264

    Google Scholar 

  • James CJW (1977) Studies on reproduction in the bat Phyllostomus hastatus in Trinidad, Wl. Ph D thesis, University of the West Indies, St Augustine, Trinidad, WI

  • Jarman PJ (1974) The social organization of antelope in relation to their ecology. Behavior 48:215–267

    Google Scholar 

  • Jones JK Jr, Carter DC (1976) Annotated checklist, with keys to subfamilies and genera. In: Baker RJ, Jones Jr JK, Carter CD (eds) Biology of bats of the new world family Phyllostomatidae, part I. Special publication no. 10: The museum. Texas Tech University Press, Lubbock

    Google Scholar 

  • Kimura M, Ohta T (1971) Theoretical aspects of population genetics. Monographs in population biology. Monograph no. 4. Princeton University Press, Princeton

    Google Scholar 

  • Klingel H (1965) Notes on the biology of the plains zebra (Equus qugga). East Afr Wildl J 3:86–88

    Google Scholar 

  • Klingel H (1967) Soziale organisation und verhalten freilebender steppenzebras. Z Tierpsychol 24:580–624

    Google Scholar 

  • Klingel H (1972) Social behavior of African Equidae. Zool Afr 7:175–186

    Google Scholar 

  • Koeppl JW, Slade NA, Hoffman RS (1975) A bivariate home range model with possible application to ethological data analysis. J Mammal 56:81–90

    Google Scholar 

  • Kruuk H (1978) Foraging and spacial organisation of the european badger (Meles meles). Behav Ecol Sociobiol 4:75–89

    Google Scholar 

  • Laws RM, Parker ISC, Johnstone RCB (1975) Elephants and their ecology: the ecology of elephants in N. Bunyoro, Uganda. Clarendon Press, Oxford

    Google Scholar 

  • Levene H (1949) On a matching problem arising in genetics. Ann Math Stat 20:91–94

    Google Scholar 

  • Matessi C, Jayakar SD (1976) Conditions for the evolution of altruism under Darwinian selection. Theor Popul Biol 9:360–387

    Google Scholar 

  • Maynard Smith J (1964) Group selection and kin selection. Nature 201:1145–1147

    Google Scholar 

  • Maynard Smith J (1976) Group selection. Q Rev Biol 52:277–283

    Google Scholar 

  • McClintock MK (1971) Menstrual synchrony and suppression. Nature 229:244–245

    Google Scholar 

  • McCracken GF, Bradbury JW (1977) Paternity and genetic heterogeneity in the polygynous bat, Phyllostomus hastatus. Science 198:303–306

    Google Scholar 

  • McNab BK (1969) The economics of temperature regulation in neotropical bats. Comp Biochem Physiol 31:227–268

    Google Scholar 

  • Morrison DW (1978) Lunar phobia in a neotropical fruit bat, Artibeus jamaicensis (Chiroptera: Phyllostomatidae). Anim Behav 26:852–855

    Google Scholar 

  • Packer C (1977) Reciprocal altruism in Papio anubis. Nature 265:441–443

    Google Scholar 

  • Pusey AE (1978) Intercommunity transfer of chimpanzees in Gombe National Park. In: Hamburg DA (ed) Perspectives on human evolution (great apes), vol 6. Staples Press/Benjamin, New York

    Google Scholar 

  • Schaffer WM (1978) A note on the theory of reciprocal altruism. Am Nat 112:250–253

    Google Scholar 

  • Selander RK (1970) Behavior and genetic variation in natural populations. Am Zool 10:53–66

    Google Scholar 

  • Selander RK, Smith MH, Yang SV, Johnson WE, Gentry JB (1971) Biochemical polymorphism and systematics in the genus Peromyscus. I. Variation in the old field mouse. Stud Genet 6 (Univ Texas Publ no 7103)

  • Sherman PW (1977) Nepotism and the evolution of alarm calls. Science 197:1246–1253

    Google Scholar 

  • Siegel S (1956) Nonparametric statistics for the behavioral sciences. McGraw-Hill, New York

    Google Scholar 

  • Sokal RR, Rohlf FJ (1969) Biometry. Freeman, San Francisco

    Google Scholar 

  • Southwood TRE (1968) Ecological methods. Methuen, London

    Google Scholar 

  • Sussman LN (1976) Paternity testing by blood grouping, 2nd ed. Thomas, Springfield, IL

    Google Scholar 

  • Suthers RA (1970) Vision, olfaction and taste. In: Wimsatt WA (ed) The biology of bats, vol II, chap 5. Academic Press, New York

    Google Scholar 

  • Thomas SP (1975) Metabolism during flight in two species of bats, Phyllostomus hastatus and Pteropus gouldii. J Exp Biol 63:273–295

    Google Scholar 

  • Trivers RL (1971) The evolution of reciprocal altruism. Q Rev Biol 46, 35–57

    Google Scholar 

  • Trivers RL, Willard DE (1972) Natural selection of parental ability to vary the sex ratio of offspring. Science 179:90–91

    Google Scholar 

  • Wade MJ (1977) An experimental study of group selection. Evolution 31:134–153

    Google Scholar 

  • Wade MJ (1979) The evolution of social interactions by family selection. Am Nat 113:399–417

    Google Scholar 

  • Williams GC (1966) Adaptation and natural selection. Princeton University Press, Princeton

    Google Scholar 

  • Williams TC, Williams JM (1967) Radio tracking of homing bats. Science 155:1435–1436

    Google Scholar 

  • Williams TC, Williams JM (1970) Radio tracking of homing and feeding flights of a neotropical bat, Phyllostomus hastatus. Anim Behav 18:302–309

    Google Scholar 

  • Wilson AC, Bush GL, Case SM, King MC (1975) Social structuring of mammalian populations and rate of chromosomal evolution. PNAS 72:5061–5065

    Google Scholar 

  • Wilson DS (1975) A theory of group selection. PNAS 72:143–146

    Google Scholar 

  • Wilson DS (1975) Structured demes and the evolution of group-advantageous traits. Am Nat 111:157–185

    Google Scholar 

  • Wilson DS (1979) Structured demes and trait-group variation. Am Nat 113:606–610

    Google Scholar 

  • Wilson DS (1980) The natural selection of populations and communities. Benjamin/Cummings Publishing, Menlo Park, CA

    Google Scholar 

  • Wilson EO (1975) Sociobiology: The new synthesis. The Belknap Press, Cambrige, MA

    Google Scholar 

  • Wrangham RW (1977) Feeding behavior of chimpanzees in Gombe National Park, Tanzania. In: Cluton-Brock TH (ed) Primate ecology. Academic Press, London, pp 504–538

    Google Scholar 

Download references

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McCracken, G.F., Bradbury, J.W. Social organization and kinship in the polygynous bat Phyllostomus hastatus . Behav Ecol Sociobiol 8, 11–34 (1981). https://doi.org/10.1007/BF00302840

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