Rachel L. Jacobs

ORCID: 0000-0001-6075-7767
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About
Contact & Profiles
Research Areas
  • Primate Behavior and Ecology
  • Animal Behavior and Reproduction
  • Amphibian and Reptile Biology
  • Wildlife Ecology and Conservation
  • Animal Vocal Communication and Behavior
  • Molecular Biology Techniques and Applications
  • Identification and Quantification in Food
  • Retinal Development and Disorders
  • Olfactory and Sensory Function Studies
  • Evolution and Paleontology Studies
  • Pleistocene-Era Hominins and Archaeology
  • Photoreceptor and optogenetics research
  • Engineering Technology and Methodologies
  • Neural dynamics and brain function
  • Salivary Gland Tumors Diagnosis and Treatment
  • Archaeology and Natural History
  • Bat Biology and Ecology Studies
  • Computational and Text Analysis Methods
  • Veterinary Pharmacology and Anesthesia
  • Advanced Chemical Sensor Technologies
  • Language and cultural evolution
  • Evolutionary Psychology and Human Behavior
  • Animal Ecology and Behavior Studies
  • Meat and Animal Product Quality
  • Medical and Biological Sciences

George Washington University
2016-2022

United States Fish and Wildlife Service
2018-2019

Ashland (United States)
2018-2019

Université de Fianarantsoa
2016-2017

Stony Brook University
2007-2016

Long-term research of known individuals is critical for understanding the demographic and evolutionary processes that influence natural populations. Current methods individual identification many animals include capture tagging techniques and/or researcher knowledge variation in phenotypes. These can be costly, time-consuming, may impractical larger-scale, population-level studies. Accordingly, animal lineages, long-term projects are often limited to only a few taxa. Lemurs, mammalian...

10.1186/s40850-016-0011-9 article EN cc-by BMC Zoology 2017-01-23

Abstract Background Lymphatic malformations can present as a floor of the mouth mass, they are rare vascular lesions, presenting most frequently in head and neck region mostly at birth or before 2 years age. Clinical diagnostic findings make differential diagnosis with other masses, such ranulas, difficult. Case presentation We case 7-year-old girl sudden swelling without infectious characteristics. Clinically after imaging, was compatible ranula. After sublingual sialadenectomy, recurrence...

10.1186/s43163-025-00756-z article EN cc-by The Egyptian Journal of Otolaryngology 2025-01-21

Some primate populations include both trichromatic and dichromatic (red–green colour blind) individuals due to allelic variation at the X-linked opsin locus. This polymorphic trichromacy is well described in day-active New World monkeys. Less known about vision Malagasy lemurs, but, unlike monkeys, only some lemurs are polymorphic, while others dichromatic. The evolutionary pressures underlying these differences unknown, but aspects of species ecology, including activity pattern,...

10.1098/rsbl.2017.0050 article EN Biology Letters 2017-03-01

Prolemur simus (the greater bamboo lemur) is the most abundant lemur in northern subfossil sites of Madagascar. Living populations still persist, but low numbers within a diminished range, making it one critically endangered lemurs. Over past twenty years scientists have searched south- and central-eastern rain forests Despite surveys that encompass over 500 km2, less than 75 animals been found, with recent total count 60. More encouraging 2007 two new containing P. were found: Mahasoa an...

10.1896/052.023.0102 article EN Primate Conservation 2008-11-01

ABSTRACT Primate evolutionary morphologists have argued that selection for life in a fine branch niche resulted grasping specializations are reflected the hallucal metatarsal (Mt1) morphology of extant “prosimians”, while transition to use relatively larger, horizontal substrates explains apparent loss such characters anthropoids. Accordingly, these morphological characters—Mt1 torsion, peroneal process length and thickness, physiological abduction angle—have been used reconstruct ability...

10.1002/ajpa.22652 article EN American Journal of Physical Anthropology 2014-11-05

Color vision in primates is variable across species, and it represents a rare trait which the genetic mechanisms underlying phenotypic variation are fairly well-understood. Research on primate color has largely focused adaptive explanations for observed variation, but remains unclear why some species have trichromatic or polymorphic while others red-green blind. Lemurs, particular, highly variable. While polymorphic, many closely-related strictly dichromatic. We provide first...

10.1371/journal.pone.0149664 article EN cc-by PLoS ONE 2016-03-09

Rationale Trade in rhinoceros horn is regulated or banned internationally recognition of its impact on wild populations worldwide. Enforcement the laws and regulations depends successfully identifying when violations occur, which complicated by presence alternative/imitation keratin (e.g., bovid keratin). In this study, we assess potential for Direct Analysis Real Time (DART) ionization paired with Time‐Of‐Flight Mass Spectrometry (DART‐TOFMS) to classify different types from four taxonomic...

10.1002/rcm.8285 article EN Rapid Communications in Mass Spectrometry 2018-09-19

Genetic analyses of parentage sometimes reveal that "socially monogamous" (pair-living) species do not reside in strict family groups. Circumstances such as adult turnovers and extra-pair copulations, among others, may result non-nuclear families. These genetic relationships within groups have implications for interpreting social behaviors. Red-bellied lemurs (Eulemur rubriventer) live generally comprising an male-female pair plus immatures, early a relatively small sample suggested they...

10.1002/ajp.22738 article EN American Journal of Primatology 2018-02-01

Abstract Conservation plans aiming to reduce the threat of illegal wildlife trade increasingly recognize need for multifaceted approaches that include both enhanced enforcement and demand reduction initiatives. Both are complex issues involve understanding consumer motives. Pangolins represent some most heavily trafficked species, largely due high their scales use in traditional medicines. Recent media reports also suggest is related purported presence analgesic tramadol scales. We examined...

10.1111/csp2.82 article EN cc-by Conservation Science and Practice 2019-07-04

Abstract Objectives Hair (i.e., pelage/fur) is a salient feature of primate (including human) diversity and evolution—serving functions tied to thermoregulation, protection, camouflage, signaling—but wild pelage evolution remains relatively understudied. Specifically, assessing multiple hypotheses across distinct phylogenetic scales essential but rarely conducted. We examine whole body hair color density variation Indriidae ( Avahi , Indri Propithecus )—a lineage that, like humans, exhibits...

10.1002/ajpa.24508 article EN American Journal of Physical Anthropology 2022-03-08

Abstract Objectives Hair (i.e., pelage/fur) is a salient feature of primate (including human) diversity and evolution— serving functions tied to thermoregulation, protection, camouflage, signaling—but wild pelage evolution remains relatively understudied. Specifically, assessing multiple hypotheses across distinct phylogenetic scales essential but rarely conducted. We examine whole body hair color density variation Indriidae ( Avahi , Indri Propithecus )—a lineage that, like humans, exhibits...

10.1101/2021.10.16.464615 preprint EN cc-by-nc-nd bioRxiv (Cold Spring Harbor Laboratory) 2021-10-17
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