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Surviving in the Dark: The Complexities of Nocturnal Animal Behavior...
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Surviving in the Dark: The Complexities of Nocturnal Animal Behavior and Adaptation

A special issue of Animals (ISSN 2076-2615). This special issue belongs to the section "Wildlife".

Deadline for manuscript submissions: closed (31 December 2024) | Viewed by 9904

Image courtesy of 1 Will Hall; 2,3,5 Aconk; 4 Carlos Carrapato; 6 Diogo Oliveira; (1. Nycticebus javanicus, 2. Paradoxurus musanga javanicus, 3. Vivvericula indica, 4. Lynx pardinus, 5. Prionailurus javanensis, 6. Miniopterus schreibersii)

Special Issue Editors

Dr. Luísa Rodrigues

E-Mail Website
Guest Editor
Instituto da Conservação da Natureza e das Florestas, Lisbon, Portugal
Interests: bats; wildlife; conservation; monitoring; conservation education
Prof. Dr. Anna Nekaris

E-Mail Website1 Website2
Guest Editor
Department of Anthropology and Primate Conservation, Oxford Brookes University, Oxford OX3 0BP, UK
Interests: animal welfare; mammal conservation; nocturnal animals; spatial ecology; density and distribution of mammals; feeding ecology; home range; illegal wildlife trade; taxonomy; conservation education; bioacoustics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The field of nocturnal animal behaviour and adaptation is a fascinating, developing area focusing on the ecological and biorhythmic changes in species that need or prefer to be awake during the night.

Recent advances in methodologies have significantly improved the ability to study and understand some of these changes. These include field-based methods, which allow for us to collect more detailed data than ever before; analytical methods, which allow for us to interpret these data; and genetic and taxonomic methods, which allow for us to reveal more cryptic nocturnal animals.

The world, and consequently, all natural values, have been influenced by climate change and anthropogenic changes, posing additional difficulties in understanding some biological adaptations. Scientists have an even more difficult task to distinguish between normal biological adaptations and those influenced by climate- or other human-mediated effects, such as artificial light at night.

Overall, this Special Issue intends to provide a comprehensive overview of the current state-of-the-art in nocturnal animal behaviour and adaptation, and new methodologies to study them.

We welcome high-quality and original research or review papers that address new insights on these topics.

Dr. Luísa Rodrigues
Prof. Dr. Anna Nekaris
Guest Editors

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Animals is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • nocturnal species
  • nocturnal behaviour
  • nocturnal adaptation
  • biorhythmic changes
  • cryptic species
  • climate change
  • bats
  • amphibians
  • marsupials
  • primates
  • birds
  • reptiles
  • conservation

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Published Papers (6 papers)

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Research

30 pages, 3121 KiB  
Article
Sensory Reconstruction of the Fossil Lorisid Mioeuoticus: Systematic and Evolutionary Implications
by Holly E. Anderson, Adam Lis, Ingrid Lundeen, Mary T. Silcox and Sergi López-Torres
Animals 2025, 15(3), 345; https://doi.org/10.3390/ani15030345 - 25 Jan 2025
Viewed by 246
Abstract
The fossil record of lorises and pottos (family Lorisidae) potentially dates back to the late Oligocene of Namibia, but a later moderate diversification of this family occurred during the Miocene of Africa and Asia. In the African Miocene, the family Lorisidae is represented [...] Read more.
The fossil record of lorises and pottos (family Lorisidae) potentially dates back to the late Oligocene of Namibia, but a later moderate diversification of this family occurred during the Miocene of Africa and Asia. In the African Miocene, the family Lorisidae is represented solely by one genus: Mioeuoticus. The phyletic position of Mioeuoticus has been a source of debate, as it has been suggested to belong to either the stem of the family Lorisidae or to be further nested within lorisids, as a sister to the African potto clade (subfamily Perodicticinae). Reconstructing the internal sensory anatomy of Mioeuoticus shipmani (KNM-RU 2052) could shed some light on this debate and possibly clarify how modern lorisoid olfactory and visual sensitivity and locomotor abilities evolved. Here, we collected data from the nasal turbinals, bony labyrinths, and orbits of Mioeuoticus shipmani from the early Miocene of Rusinga Island, Kenya. These results are consistent with Mioeuoticus, having developed typical modern lorisid behaviour (i.e., slow locomotion, nocturnal activity pattern) and olfactory abilities consistent with modern representatives. However, the arrangement of the nasal turbinals shows an intermediate state between lemuroids and lorisoids that is most consistent with a basal position of Mioeuoticus within the family Lorisidae or even the superfamily Lorisoidea. Full article
(This article belongs to the Special Issue Surviving in the Dark: The Complexities of Nocturnal Animal Behavior and Adaptation)
20 pages, 4295 KiB  
Article
Effective Survey Methods for the Elusive Data Deficient Black Flying Squirrel (Aeromys tephromelas) in Sabah, Malaysia Facilitate First Vocalisation Record
by Sapphire Hampshire and Priscillia Miard
Animals 2024, 14(22), 3323; https://doi.org/10.3390/ani14223323 - 19 Nov 2024
Viewed by 1051
Abstract
Flying squirrels are nocturnal, gliding relatives of tree and ground squirrels (order Sciuridae). Despite 49 species existing, literature on Asiatic flying squirrels is scarce, thus they are overlooked in conservation action plans. Recently, three species of giant flying squirrel (Aeromys tephromelas, [...] Read more.
Flying squirrels are nocturnal, gliding relatives of tree and ground squirrels (order Sciuridae). Despite 49 species existing, literature on Asiatic flying squirrels is scarce, thus they are overlooked in conservation action plans. Recently, three species of giant flying squirrel (Aeromys tephromelas, Petaurista petaurista and Aeromys thomasi) were observed during a nocturnal mammal survey at the Rainforest Discovery Centre (RDC), an Eco centre at the edge of the Kabili-Sepilok forest reserve in Sepilok, Sabah (Malaysia, Borneo). The survey (February–March 2023) incorporated the use of red LED spotlighting, thermal imaging and bioacoustic recording during systematic along-line point counts. This is the first report on flying squirrel ecology in Sabah and the first focused publication on the ‘giant’ black flying squirrel (A. tephromelas), categorised by the IUCN as Data Deficient. The most notable result was the first documentation of a black flying squirrel vocalisation event (106 calls at a frequency range of 0.75–2.69 kHz and mean duration of 1.4 s). Although call function was not determined, this result sheds light on a previously unknown part of their ecology. These results stress the urgency for further research on the black flying squirrel to evaluate their current extinction risk, considering deforestation is prevalent across most of their distribution. Full article
(This article belongs to the Special Issue Surviving in the Dark: The Complexities of Nocturnal Animal Behavior and Adaptation)
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13 pages, 1438 KiB  
Article
Evaluating the Use of Chemical Weapons for Capturing Prey by a Venomous Mammal, the Greater Slow Loris (Nycticebus coucang)
by Grace Fuller, Wirdateti and K. A. I. Nekaris
Animals 2024, 14(10), 1438; https://doi.org/10.3390/ani14101438 - 11 May 2024
Viewed by 1609
Abstract
Few mammals are venomous, including one group of primates—slow (Nycticebus spp.) and pygmy (Xanthonycticebus spp.) lorises. Hypotheses for the evolutionary function of venom in these primates include defense from predators or ectoparasites, communication or competition with conspecifics, and the capture of [...] Read more.
Few mammals are venomous, including one group of primates—slow (Nycticebus spp.) and pygmy (Xanthonycticebus spp.) lorises. Hypotheses for the evolutionary function of venom in these primates include defense from predators or ectoparasites, communication or competition with conspecifics, and the capture of prey. We tested the prey capture hypothesis in 75 trials with 22 wild-caught greater slow lorises (N. coucang) housed in a rescue center in Java, Indonesia. We experimentally offered the slow lorises arthropod prey items varying in size, escape potential, and toxicity and recorded venom-related and predatory behaviors using live and video observations. The slow lorises visually targeted arthropod prey, approached it quickly and efficiently, and captured it with a manual grasping motion. They rarely performed venom-related behaviors and seemed to do so in a defensive context. The slow lorises exhibited little variation in pre-capture behavior as a function of prey size or escape potential. In response to noxious prey, the slow lorises performed tongue-flicking and other investigative behaviors that indicate they are using chemosensory input to assess prey characteristics. These data suggest it is unlikely that slow lorises use chemical weapons to subdue arthropod prey and may support, instead, a defensive function for slow loris venom. Full article
(This article belongs to the Special Issue Surviving in the Dark: The Complexities of Nocturnal Animal Behavior and Adaptation)
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11 pages, 1119 KiB  
Article
Population Abundance and Density Estimates of Poorly Documented Near-Threatened Calabar Angwantibo (Arctocebus calabarensis) in Oban Hills Region
by James Kehinde Omifolaji, Sunday Opeyemi Adedoyin, Emmanuel Tersea Ikyaagba, Tauheed Ullah Khan, Victor Abiodun Ojo, Yiming Hu, Abideen Abiodun Alarape, Saka Oladunni Jimoh and Huijian Hu
Animals 2024, 14(9), 1374; https://doi.org/10.3390/ani14091374 - 2 May 2024
Cited by 1 | Viewed by 1530
Abstract
Population abundance and density estimates play important roles in biodiversity conservation assessment and can lead to prioritization of conservation efforts, strategies, and management. The Calabar angwantibo (Arctocebus calabarensis) is a poorly studied, Near-Threatened nocturnal, arboreal mammal species occurring only in the [...] Read more.
Population abundance and density estimates play important roles in biodiversity conservation assessment and can lead to prioritization of conservation efforts, strategies, and management. The Calabar angwantibo (Arctocebus calabarensis) is a poorly studied, Near-Threatened nocturnal, arboreal mammal species occurring only in the lowland moist tropical rainforest blocks of southeastern Nigeria and southwestern Cameroon. Like other arboreal nocturnal mammals, there are gaps in knowledge of the distribution and abundance of this species, which may be facing population declines due to habitat loss and hunting. In this study, we investigated the abundance and density of A. calabarensis in the Oban Hills Region of Nigeria. We conducted systematic distance sampling survey along 32 transects in different habitats in a 1227 km of survey efforts. A total of 41 sightings of A. calabarensis were detected, resulting in an abundance of 7345 individuals (95% CI = 1.51–4.37) with an estimated density of 2.57 animals/km2. The estimated population abundance is 6515 individuals in closed-canopy forests and 830 individuals in secondary forests, with encounter rates of 0.52 individual/km2 and 0.60 individuals/km2 in the closed canopy and secondary forest habitats. The global estimates encounter rate of A. calabarensis across the habitat types is 0.33 individuals/km2 and population abundance of 4456 individuals. Our findings indicate that the A. calabarensis populations can adapt to low changes in forest habitat modifications resulting from increasing and widespread forest disturbance by human-dominated activity, which is giving way to forest clearance for agriculture cultivation and infrastructural development. Our findings help to fill a knowledge gap regarding this species and may help establish a baseline for future management, population monitoring, and conservation of the cryptic population of A. calabarensis in Cross-Sanaga Forests. Full article
(This article belongs to the Special Issue Surviving in the Dark: The Complexities of Nocturnal Animal Behavior and Adaptation)
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14 pages, 4151 KiB  
Article
The Spatial Niche and Influencing Factors of Desert Rodents
by Xin Li, Na Zhu, Ming Ming, Lin-Lin Li, Fan Bu, Xiao-Dong Wu, Shuai Yuan and He-Ping Fu
Animals 2024, 14(5), 734; https://doi.org/10.3390/ani14050734 - 27 Feb 2024
Viewed by 1356
Abstract
Resource partitioning may allow species coexistence. Sand dunes in the typical steppe of Alxa Desert Inner Mongolia, China, consisting of desert, shrub, and grass habitats, provide an appropriate system for studies of spatial niche partitioning among small mammals. In this study, the spatial [...] Read more.
Resource partitioning may allow species coexistence. Sand dunes in the typical steppe of Alxa Desert Inner Mongolia, China, consisting of desert, shrub, and grass habitats, provide an appropriate system for studies of spatial niche partitioning among small mammals. In this study, the spatial niche characteristics of four rodents, Orientallactaga sibirica, Meriones meridianus, Dipus sagitta, and Phodopus roborovskii, and their responses to environmental changes in the Alxa Desert were studied from 2017 to 2021. Using the capture-mark-recapture method, we tested if desert rodents with different biological characteristics and life history strategies under heterogeneous environmental conditions allocate resources in spatial niches to achieve sympatric coexistence. We investigated the influence of environmental factors on the spatial niche breadth of rodents using random forest and redundancy analyses. We observed that the spatial niche overlap between O. sibirica and other rodents is extremely low (overlap index ≤ 0.14). P. roborovskii had the smallest spatial niche breadth. Spatial niche overlap was observed in two distinct species pairs, M. meridianus and D. sagitta, and P. roborovskii and D. sagitta. The Pielou evenness index of rodent communities is closely related to the spatial distribution of rodents, and the concealment of habitats is a key factor affecting the spatial occupation of rodents. Full article
(This article belongs to the Special Issue Surviving in the Dark: The Complexities of Nocturnal Animal Behavior and Adaptation)
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17 pages, 1027 KiB  
Article
Reaction to Novel Objects and Fecal Glucocorticoid Metabolite Levels in Two Species of Nocturnal Geckos
by Gloria Fernández-Lázaro, Roberto Latorre, Juan Carlos Fontanillas Pérez and Isabel Barja
Animals 2023, 13(21), 3384; https://doi.org/10.3390/ani13213384 - 31 Oct 2023
Cited by 3 | Viewed by 1885
Abstract
Many reptiles are maintained in captivity and heavily traded, although welfare measures for many species are not well established and are under-researched compared to other animals. In this study, we focused on two of these species: crested geckos (Correlophus ciliatus) and [...] Read more.
Many reptiles are maintained in captivity and heavily traded, although welfare measures for many species are not well established and are under-researched compared to other animals. In this study, we focused on two of these species: crested geckos (Correlophus ciliatus) and leopard geckos (Eublepharis macularius). To better interpret their behavior in captivity, the individual reaction to novel objects and the fecal glucocorticoid metabolite levels were measured in an attempt to identify the potential correlation between them. Also, we explored if some characteristic of the objects (e.g., color, shape, or smell) resulted in being more attractive to some species and/or individuals. Equivalent responses to different objects were not obtained for all the geckos, the behavioral response being highly individual and context-dependent, although modulated by the species. Individuals which manipulated earlier and interacted longer with novel objects showed lower basal fecal corticosterone metabolite (FCM) levels. Differences according to the species suggested that crested geckos have significantly greater and more variable FCM levels than leopard geckos. Our results can help to understand the reaction of geckos to novelty and have the potential to serve in their welfare assessment, although more studies are needed to proper establish welfare protocols. Full article
(This article belongs to the Special Issue Surviving in the Dark: The Complexities of Nocturnal Animal Behavior and Adaptation)
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