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@INPROCEEDINGS{Abdullah:910717,
      author       = {Abdullah, I. and Decasien, A. and Taylor, C. and Mcniff, G.
                      and Longtin, A. and Barone, C. and Snyder, A and Loganathan,
                      A. and Wahed, Z. and Pipa, Z. and Herold, Christina and
                      Amunts, Katrin and Sherwood, C.},
      title        = {{C}omparison of {T}emporal {C}ortex {C}ytoarchitectural
                      {V}ariability {A}cross {P}rimates},
      reportid     = {FZJ-2022-04087},
      year         = {2022},
      abstract     = {Primates with larger brains tend to possess a greater
                      number of distinct cortical areas, but there are limited
                      data from systematic quantita-tive analysis of
                      cytoarchitectural variation across the cortex of different
                      species. The current study aimed to determine if brain size
                      covaries with cellular distributions across the cortical
                      surface. Greater cytoarchitectural differentiation might
                      indicate increased modularity of cortical func-tion. Our
                      preliminary sample included coronal histological sections of
                      the temporal lobe from Indri indri, Lagothrix lagotricha,
                      Saguinus midas, and Saimiri sciureus. The temporal lobe
                      contains cortical areas that function in higher-order
                      audi-tory processing and visual object recognition. The
                      cortex was sampled from c200 equidis-tantly-located sites in
                      each brain from sections representing the entire
                      rostrocaudal axis of the temporal lobe. From each site,
                      characteristics of cellular distributions were quantiܪed
                      using image analysis procedures to obtain data on vertical
                      changes from the top of layer II to bottom of layer VI in:
                      1) the proportion of cell proܪles versus neuropil space
                      (grey level) and 2) the size distri-bution and density of
                      cell proܪles. Results showed that the coefܪcient of
                      variation in cortical grey level increased with brain size
                      (rho"0.95, P"0.05). Variation in cell proܪle sizes tended
                      to decrease, but not signiܪcantly (rho"-0.80, P"0.20). We
                      found no consistent rostrocaudal gradient of variation in
                      these aspects of cytoarchitecture across temporal lobe
                      sections in the sample. Further analyses will incorporate a
                      greater range of primates. These studies will contribute to
                      our understanding of developmental mechanisms in shaping
                      primate cortical structure.Same-sex sexual behavior in wild
                      woolly monkeys (Lagothrix lagotricha poeppigii)LAURA A.
                      ABONDANO1, KELSEY M. ELLIS2 and ANTHONY DI
                      FIORE1,31Department of Anthropology, University of Texas at
                      Austin, 2Department of Anthropology, Miami University,
                      3Tiputini Biodiversity Station, College of Biological and
                      Environmental Sciences, Universidad San Francisco de
                      QuitoStudies of sexual behaviors and reproductive
                      strat-egies have often focused on interactions between
                      different-sex dyads, potentially underestimating the
                      frequency of same-sex sexual behavior (SSSB) among animal
                      species. However, SSSB is ubiquitous across the animal
                      kingdom, and, among primates, there are a variety of species
                      that commonly display SSSB (e.g., bonobos, macaques,
                      capuchins). Here, we present novel data on same-sex mounting
                      behavior, one type of SSSB, in wild woolly monkeys
                      (Lagothrix lagotricha poeppigii) living in a pristine
                      tropical rainforest in the Ecuadorian Amazon. Between 2014
                      and 2018, we recorded data on sexual behaviors among adult
                      and subadult individuals in four neighboring social groups.
                      Of 279 observed cases of mounting, ܪve $(1.8\%)$ were among
                      same-sex dyads (four female-female and one male-male).
                      Interestingly, all ܪve cases involved at least one subadult
                      individual, suggesting that in woolly monkeys SSSB may be
                      used as an exper-imental or learning strategy for subadults
                      prior to reaching sexual maturity as adults. However,
                      further investigations are needed to better under-stand the
                      function of SSSB in woolly monkeys. With this study, we hope
                      to grow the compara-tive data set to better understand the
                      function of non-conceptive sexual behaviors, including SSSB,
                      among animals including primates.},
      month         = {Mar},
      date          = {2022-03-23},
      organization  = {91st Annual Meeting of the American
                       Associatin of Biological
                       Anthropologists, Denver (USA), 23 Mar
                       2022 - 1 Apr 2022},
      cin          = {INM-1},
      cid          = {I:(DE-Juel1)INM-1-20090406},
      pnm          = {5251 - Multilevel Brain Organization and Variability
                      (POF4-525)},
      pid          = {G:(DE-HGF)POF4-5251},
      typ          = {PUB:(DE-HGF)1},
      UT           = {WOS:000772245500002},
      url          = {https://juser.fz-juelich.de/record/910717},
}