OOIR: Observatory of International Research

Papers

(The median citation count of Zoological Science is 1. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2021-09-01 to 2025-09-01.)

Article	Citations
Changes in Behavior and Diel Melatonin Secretion Toward Estivation in Western Sand Lance, Ammodytes japonicus (Uranoscopiformes, Ammodytidae)	39
Comparative Observation and Analysis of Preference Behavior Based on Three Types of Taxes and Locomotor Activity in the Goldfish, Carassius auratus	27
Development of the Pronotal Explanate Margin, a Novel Evolutionary Trait in Tortoise Beetles	18
It Pays to Sit Tight: Stable Night-Time Incubation Increases Hatching Success in Urban and Forest Great Tits, Parus major	12
Ontogenetic Expressions of Sexually Dimorphic Traits in the Skeleton Shrimp Caprella scaura (Crustacea: Amphipoda)	10
Embryonic Development of the Gastrodermis in the Coral Acropora tenuis	9
Yawning and Its Temperature-Dependent Modulation in Leopard Geckos	9
Timeless Plays an Important Role in Compound Eye-Dependent Photic Entrainment of the Circadian Rhythm in the Cricket Gryllus bimaculatus	8
Consistent Negative Correlations between Parasite Infection and Host Body Condition Across Seasons Suggest Potential Harmful Impacts of Salmincola markewitschi on Wild White-Spotted Charr, Salvelinus	7
Endocrine Regulation of Aging in the Fruit Fly Drosophila melanogaster	7
Topotype-Based Chromosomal Diversity among Five Species of Freshwater Armored Catfishes in the Hypostomus auroguttatus Supergroup (Actinopterygii: Siluriformes)	7
Cnidopsins Characterized as Bistable Opsins From a Reef-Building Coral, Acropora tenuis	7
Landscape Genetic Analysis for the Japanese Wild Boar in the Early Expanding Stage in the Hokuriku Region of Japan	6
Population Genetics of the Asian Parti-Colored Bat, Vespertilio sinensis: Insights into Seasonal Migration in the Japanese Archipelago	6
The Mitochondrial Phosphatase PTPMT1 is Required for the Proper Growth Rate in the Red Flour Beetle, Tribolium castaneum	5
Volume X-Ray Micro-Computed Tomography Analysis of the Early Cephalized Central Nervous System in a Marine Flatworm, Stylochoplana pusilla	5
Obituary	5
Acetylcholine Inhibits Spontaneous Firing Activity of Terminal Nerve GnRH Neurons in Medaka	5
Distribution and Population Genetic Structure of the Hau Giang Medaka, Oryzias haugiangensis, Along the East Coast of the Indochinese Peninsula	5
Wnt4a Is Indispensable for Genital Duct Elongation but Not for Gonadal Sex Differentiation in the Medaka, Oryzias latipes	5
Morphological Analysis of the Olfactory System of the Pig-Nosed Turtle, Carettochelys insculpta	5
The Phylogenetic Position of Branchamphinome (Annelida, Amphinomidae) with a Description of a New Species from the North Pacific Ocean	5
Evaluation of Nitrogen Source Uptake by the Bivalve Nuttallia olivacea Fed with 15N-Labeled Diatoms	5
Characterization of Anthozoan-Specific Opsins from a Reef-Building Coral, Acropora tenuis, as Gq-Coupled Opsins	5
New Invasive Leaf Gall-Inducing Wasps Ophelimus cracens sp. nov. and Epichrysocharis burwelli on Eucalypts in Taiwan	5

Luticola nematophagus gen. et sp. nov. (Platyhelminthes: Rhabdocoela), a Terrestrial Ascophorine Flatworm from China and Its Biological Characteristics	5
Molecular Phylogeny and Taxonomy of the Coral Genus Cyphastrea (Cnidaria, Scleractinia, Merulinidae) in Japan, With the First Records of Two Species	4
Food Habits of the Japanese Dormouse in the Yatsugatake Mountains, Japan	4
Beautiful Claws of a Tiny Water Bear: a Review and Proposal for Claw Configuration	4
Epicatechin Alters the Activity of a Neuron Necessary for Long-Term Memory of Aerial Respiratory Behavior in Lymnaea stagnalis	4
Canonical and Non-Canonical Functions of Erythropoietin and Its Receptor in Mature Nucleated Erythrocytes of Western Clawed Frog, Xenopus tropicalis	4
A New Heteronemertean Genus with Variable Potential of Anterior Regeneration for Species Formerly Belonging to Lineus (Nemertea: Pilidiophora)	4
Ascidian Larvae Prefer Hydrophobic Substrates for Settlement	4
A New Species of Prosadenoporus (Nemertea: Eumonostilifera) from the North-East Coast of the Bay of Bengal, India	4
At-Sea Habitat Use of Rhinoceros Auklets Breeding in the Shelf Region of Eastern Hokkaido	4
Symbiotic Algae of Acoel Species in the Seto Inland Sea and Symbiont Selectivity in the Hosts	4
Feeding Strategy of Wild Japanese Martens (Martes melampus) in Northern Japan	4
The Bryozoan Cauloramphus magnus (Cheilostomata: Calloporidae) in Northern Japan Includes Multiple, Co-occurring Cryptic Species	4
Are Amphibian Eggs a Precious Food Resource for Cynops pyrrhogaster (Amphibia: Urodela) in Spring?	3
Temperature Acclimation and Cold Tolerance in Caenorhabditis Elegans are Regulated by Multiorgan Coordination	3
Management of Nuisance Macromoths in Expressways through Academic-Industrial Collaboration: Light Trap Designed on the Basis of Moths' Preferences for Light Attributes	3
A Taxonomic List of Sea Spiders (Arthropoda, Pycnogonida) from Japanese Waters	3
Association of Aquaporin 7 and 9 with Obesity and Fatty Liver in db/db Mice	3
Sperm Size Decreases With Increasing Pheomelanin Pigmentation but Not With the Amount of Glutathione in the Barn Swallow	3
The Compound Eye Regulates Free-Running Period and Stability of the Circadian Locomotor Rhythm in the Cricket Gryllus bimaculatus	3
A New Polychaete, Scolelepis (Parascolelepis) Brunnea sp. nov. (Annelida: Spionidae), from Korea	3
The Growth Zones of Test Plates in Four Spatangoid Echinoid Species: Irregular Pattern	3
Transcriptomes of Giant Sea Anemones from Okinawa as a Tool for Understanding Their Phylogeny and Symbiotic Relationships with Anemonefish	3
New Records of Azooxanthellate Scleractinian Corals (Cnidaria: Anthozoa) from Sagami Bay and Suruga Bay, Japan	3
Phenotypic Plasticity of Salamander Hatchlings in the Pre-Feeding Stage in Response to Future Prey	3
Visual Perception of Density and Density-Dependent Growth in Medaka (Oryzias latipes): A Suitable Model for Studying Density Effects in Fish	3
CRISPR-Cas9-Mediated Gene Knockout in a Non-Model Sea Urchin, Heliocidaris crassispina	3
Convergent Gene Duplication in Arctic and Antarctic Teleost Fishes	3
Not Ancient But Neotenic: Neotenactis amateras gen. et sp. nov., the First Record of a Gonactiniid Anemone from the North Pacific (Cnidaria: Anthozoa: Enthemonae)	3
Genetic Analysis Reveals Dispersal Patterns of Japanese Serow in Two Different Habitats of a Mountainous Region	3
A Manually Curated Gene Model Set for an Ascidian, Ciona robusta (Ciona intestinalis Type A)	3
Three New Earthworm Species of the Genera Amynthas and Metaphire (Oligochaeta: Megascolecidae) From Leshan, China	3
A Predator-Elicited Vocalization in Male Japanese Bush Warblers: Temporal and Spatial Singing Patterns in Relation to Presence of Conspecific Females	3
Molecular Identification and Genetic Variation of Rattus Species From Oil Palm Plantations of Malaysia Based on Mitochondrial Cytochrome Oxidase Subunit I (COI) Gene Sequences	2
Analysis of Genetic Structure and Genetic Diversity in Japanese Black Kite Population Using mtDNA	2
Circadian Rhythm and Endocrinological Control on the Swimming and Sand Burrowing Behaviors of Japanese Sand Lances Ammodytes spp. (Uranoscopiformes, Ammodytidae)	2
Teratorn and Its Related Elements – a Novel Group of Herpesviruses Widespread in Teleost Genomes	2
Corrigenda	2
A New Species of the Blind Cave Loach Genus Protocobitis (Cypriniformes: Cobitidae), Protocobitis longicostatus sp. nov., from Guangxi, China	2
Satellite Tracking of Migration Routes of the Eastern Buzzard (Buteo japonicus) in Japan through Sakhalin	2
Metabolic Water As a Route for Water Acquisition in Vertebrates Inhabiting Dehydrating Environments	2
Metabolic and Hormonal Changes Associated with Vitellogenesis in Salvator merianae Lizards	2
Ovarian Follicle Development in Ascidians	2
Lineid Heteronemerteans (Nemertea: Pilidiophora) from Sagami Bay, Japan, with Some Proposals for the Family-Level Classification System	2
Oxytocin/Vasopressin-Like Peptide in the Central Nervous System and Ovaries of the Mud Crab Scylla olivacea	2
Effect of Natural Seasonal Changes in Photoperiod and Temperature on Immune Function in Striped Hamsters	2
CD34 is Expressed in Endothelial Cells in Embryonic Testes and is Additionally Expressed in Non-Endothelial Cells in Postnatal Mouse Testes	2
Ancient Admixture in Freshwater Halfbeaks of the Genus Nomorhamphus in Southeast Sulawesi	2
Ovarian Development and Larval Release of the Hermit Crab Clibanarius eurysternus (Hilgendorf, 1879) (Decapoda: Anomura: Diogenidae) in Okinawa, Japan	2
Photoperiodism of Diapause Induction in the Silkworm, Bombyx mori	2

Transcriptome Analysis Reveals the Alternative Splicing Changes in the Immune-Related Genes of the Giant Panda (Ailuropoda melanoleuca), in Response to the Canine Distemper Vaccine	2
Acoustic Characteristics of Songs in a Recently Established Population of the Japanese Bush Warbler on an Oceanic Island	2
Contrasting Size Distributions among the Wing Spots of a Pierid Butterfly Suggest Different Selective Histories	2
Fusceulimoides kohtsukai gen. et sp. nov., a Minute Eulimid Gastropod Parasitic on the Little Brittle Star Ophiactis savignyi in Central Japan	2
Growth, Feeding, and Age of the Inshore Hagfish, Eptatretus burgeri	2
Host Size Selection in the Ectoparasite Tachaea chinensis (Isopoda: Corallanidae) under Laboratory Conditions	2
Comparative Study of Gamma Radiation Tolerance between Desiccation-Sensitive and Desiccation-Tolerant Tardigrades	2
Medaka Terb1 Mutant Displays Defects of Synaptonemal Complex Formation and Sexual Difference in Gametogenesis	2
In Vitro Phagocytosis of Different Dinoflagellate Species by Coral Cells	2
Temporal Changes in Demography and Genetic Diversity of Oriental Storks at the Stage of Long-Term Captive Propagation and Reintroduction Initiation	2
Occurrence of Cruzia tentaculata Larvae in the Land Snail Megalobulimus abbreviatus—Influence of Natural Parasite Load on Snail Physiology	2
Time-Comparator Neural Circuits of Gymnotiform Electric Fishes	2
Dynamics of Laterality in the Cuttlefish Sepia recurvirostra through Interactions with Prey Prawns	2
Sinking Down or Floating Up? Current State of Taxonomic Studies on Marine Invertebrates in Japan Inferred from the Number of New Species Published between the Years 2003 and 2020	2
Radula and Shell Microstructure Variations are Congruent with a Molecular Estimate of Shallow-Water Japanese Chitons	1
Sacculina-Induced Morphological Feminization in the Grapsid Crab Pachygrapsus crassipes	1
Functional Analysis of a Juvenile Hormone Inducible Transcription Factor, Krüppel homolog 1, in the Bean Bug, Riptortus pedestris	1
Early Gonadal Differentiation in the Viviparous Red Stingray: Histological Characterization of Sexual Dimorphism	1
Defensive and Offensive Behavioral Interactions between Shelter-Building Caterpillars and Hunting Wasps	1
Phototaxis in Two Shallow-Water Zeuxo Species (Crustacea: Tanaidacea)	1
An Indirect Cost of Male-Male Aggression Arising from Female Response	1
Microfocus X-Ray Computed Tomography of Paraplanocera oligoglena (Platyhelminthes: Polycladida) with an Evaluation of Histological Sections After Scanning	1
Phylogenetics and Population Genetics of the Asian House Shrew, Suncus murinus–S. montanus Species Complex, Inferred From Whole-Genome and Mitochondrial DNA Sequences, with Special Reference to the Ry	1
Cloning and Expression Analysis of TGF-β Type I Receptor Gene in Hyriopsis cumingii	1
Comparative Phylogenetic Study on Host Newts (Caudata: Salamandridae) and Parasitic Mites (Acariformes: Hydrachnidia: Hygrobatidae) in East and Southeast Asia	1
Description of a New Species of Hua (Gastropoda: Semisulcospiridae) from Guizhou, China, Based on Morphology and Molecular Evidence	1
Populations of the Intertidal Crab Macrophthalmus banzai are Not Grouped by Latitude: Taiwan Population is Genetically Closer to the Populations in the Japanese Mainland Than the Ryukyu Islands	1
Patterns of Sexual Dimorphism, Static Allometry, and Modularity in the Skull of the Ethiopian White-Footed Mouse, Stenocephalemys albipes (Rodentia: Muridae)	1
A Relaxin-Like Gonad-Stimulating Peptide Appears in the Early Development of the Starfish Patiria pectinifera	1
Observations on Predation in Paranthura japonica Richardson, 1909 (Isopoda: Cymothoida: Paranthuridae)	1
Live Freshwater Parasite, Salmincola californiensis (Copepoda: Lernaeopodidae), on the Gills of an Ocean-Migrating Steelhead Trout (Oncorhynchus mykiss) and Discussion on the Origin and Survival of th	1
Transcriptome Analysis in a Scleractinian Coral, Acropora tenuis, during the Spawning Season With Reference to the Gonadal Condition	1
Mfge8 Knockout Affects Tail Resorption Speed During Xenopus Metamorphosis	1
CRISPR/Cas9- and Single-Stranded ODN-Mediated Knock-In in Silkworm Bombyx mori	1
Contents	1
Taxonomic Accounts and Phylogenetic Positions of the Far East Asian Centipedes Scolopocryptops elegans and S. curtus (Chilopoda: Scolopendromorpha)	1
Guiding Light: Mechanisms and Adjustments of Environmental Light Interpretation with Insights from Platynereis dumerilii and Other Selected Examples	1
Ontogenetic Expression of Aquaporins in the Kidney and Urinary Bladder of the Japanese Tree Frog, Dryophytes japonicus	1
Polydendrorhynchus amaleshii sp. nov., a New Species With Branched Proboscis (Nemertea: Heteronemertea) From the North-East Coastal Bay of Bengal	1
Cloning and Characterization of Cyp7a1 and Cyp27a1 Genes from the Non-Parasitic Japanese Lamprey Lethenteron reissneri	1
Evaluation of Visual and Tactile Perception by Plain-Body Octopus (Callistoctopus aspilosomatis) of Prey-Like Objects	1
Environmental Adaptation in Animals	1
Decreased Diversity and Abundance of Marine Invertebrates at CO2 Seeps in Warm-Temperate Japan	1
Analysis of Genetic Structure and Genetic Diversity in Japanese Grey-Headed Lapwing Population Using mtDNA	1
Co-Occurrence of Gastropods of the Genus Melanella (Mollusca: Eulimidae) Parasitizing the Black Sea Cucumber Holothuria leucospilota in Central Japan: Implications for Their Geographic Distribution an	1
Electromyography of Flight Muscles in Free-Flying Chestnut Tiger Butterfly, Parantica sita	1
Morphological Study of Left–Right Head Asymmetry in Doubledaya bucculenta (Coleoptera: Erotylidae: Languriinae)	1
Segment-Dependent Gene Expression Profiling of the Cartilaginous Fish Nephron Using Laser Microdissection for Functional Characterization of Nephron at Segment Levels	1
First Record of the Deep-Sea Sea Spider Bathypallenopsis californica (Arthropoda: Pycnogonida) from the Northwestern Pacific, with a Note on an Attached Crinoid	1
Environmentally Dependent Alteration of Reproductive Strategies and Juvenile Hormone Signaling in Daphnia (Crustacea: Cladocera)	1
Periodic Stretching of Cultured Myotubes Enhances Myofibril Assembly	1
Anemonefish Chromatophore Distribution and Organization Revealed by TEM Studies	1
Establishment of a New Model Sea Anemone for Comparative Studies on Cnidarian-Algal Symbiosis	1
Constant Light, Pdp1, and Tim Exert Influence on Free-Running Period of Locomotor Rhythms in the Cricket Gryllus bimaculatus	1
A New Species of Small Water Strider in the Genus Microvelia (Hemiptera: Heteroptera: Veliidae) from Aichi Prefecture, Honshu, Japan	1
A CatSper-Uninvolved Mechanism to Induce Forward Sperm Motility in the Internal Fertilization	1
Growth-Promotion Effects of Dissolved Amino Acids in Three Species of Hynobius Salamander Hatchlings	1
Mate Discrimination Using Chemical Cues by Male Guppies	1
Use of Visual Information by Ant Species Occurring in Similar Urban Anthropogenic Environments	1
New Species of Lower-Shelf to Upper-Slope Ctenostome Bryozoans from Pacific Japan, with a Family Range Extension	1
Phylogeographic History of Endangered Hokuriku Salamander, Hynobius takedai (Amphibia: Caudata)	1
Male Guppies Recognize Familiar Conspecific Males by Their Face	1
First Record of Elasmobranch Hosts for the Gnathiid Isopod Crustacean Thaumastognathia: Description of Thaumastognathia bicorniger sp. nov.	1
Genetic Disruption of cyp21a2 Leads to Systemic Glucocorticoid Deficiency and Tissues Hyperplasia in the Teleost Fish Medaka (Oryzias latipes)	1
Dive Deep: Bioenergetic Adaptation of Deep-Sea Animals	1
Developmental Staging of Sexual Egg Formation in Daphnia pulex: Unmated Females Resorb Meiotic Oocytes to Resist Starvation	1
Update on Feeding Regulation by Ghrelin in Birds: Focused on Brain Network	1
Fecal DNA Metabarcoding Analyses Imply Seasonally Opportunistic Feeding by the Japanese Marten, Martes melampus (Mammalia: Carnivora), in Southwestern Honshu Island, Japan	1