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 2021-05-01 to 2025-05-01.)

Article	Citations
Changes in Behavior and Diel Melatonin Secretion Toward Estivation in Western Sand Lance, Ammodytes japonicus (Uranoscopiformes, Ammodytidae)	34
Comparative Observation and Analysis of Preference Behavior Based on Three Types of Taxes and Locomotor Activity in the Goldfish, Carassius auratus	24
Topotype-Based Chromosomal Diversity among Five Species of Freshwater Armored Catfishes in the Hypostomus auroguttatus Supergroup (Actinopterygii: Siluriformes)	15
Development of the Pronotal Explanate Margin, a Novel Evolutionary Trait in Tortoise Beetles	11
It Pays to Sit Tight: Stable Night-Time Incubation Increases Hatching Success in Urban and Forest Great Tits, Parus major	9
Ontogenetic Expressions of Sexually Dimorphic Traits in the Skeleton Shrimp Caprella scaura (Crustacea: Amphipoda)	8
Yawning and Its Temperature-Dependent Modulation in Leopard Geckos	7
Endocrine Regulation of Aging in the Fruit Fly Drosophila melanogaster	7
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	6
Population Genetics of the Asian Parti-Colored Bat, Vespertilio sinensis: Insights into Seasonal Migration in the Japanese Archipelago	5
Distribution and Population Genetic Structure of the Hau Giang Medaka, Oryzias haugiangensis, Along the East Coast of the Indochinese Peninsula	5
Timeless Plays an Important Role in Compound Eye-Dependent Photic Entrainment of the Circadian Rhythm in the Cricket Gryllus bimaculatus	5
Characterization of Anthozoan-Specific Opsins from a Reef-Building Coral, Acropora tenuis, as Gq-Coupled Opsins	5
Evaluation of Nitrogen Source Uptake by the Bivalve Nuttallia olivacea Fed with 15N-Labeled Diatoms	5
Embryonic Development of the Gastrodermis in the Coral Acropora tenuis	5
Landscape Genetic Analysis for the Japanese Wild Boar in the Early Expanding Stage in the Hokuriku Region of Japan	5
The Mitochondrial Phosphatase PTPMT1 is Required for the Proper Growth Rate in the Red Flour Beetle, Tribolium castaneum	5
Beautiful Claws of a Tiny Water Bear: a Review and Proposal for Claw Configuration	4
Plain-Body Octopus's (Callistoctopus aspilosomatis) Learning about Objects via Both Visual and Tactile Sensory Inputs: A Pilot Study	4
Immunoreactive Response of Plast-MIPs to Fasting and Their Functional Role in the Reduction of Hemolymph Reducing Sugars in the Brown-Winged Green Bug, Plautia stali	4
The Phylogenetic Position of Branchamphinome (Annelida, Amphinomidae) with a Description of a New Species from the North Pacific Ocean	4
Obituary	4
At-Sea Habitat Use of Rhinoceros Auklets Breeding in the Shelf Region of Eastern Hokkaido	4
Wnt4a Is Indispensable for Genital Duct Elongation but Not for Gonadal Sex Differentiation in the Medaka, Oryzias latipes	4
Morphological Analysis of the Olfactory System of the Pig-Nosed Turtle, Carettochelys insculpta	4

Acetylcholine Inhibits Spontaneous Firing Activity of Terminal Nerve GnRH Neurons in Medaka	4
Molecular Phylogeny and Taxonomy of the Coral Genus Cyphastrea (Cnidaria, Scleractinia, Merulinidae) in Japan, With the First Records of Two Species	4
Volume X-Ray Micro-Computed Tomography Analysis of the Early Cephalized Central Nervous System in a Marine Flatworm, Stylochoplana pusilla	4
New Invasive Leaf Gall-Inducing Wasps Ophelimus cracens sp. nov. and Epichrysocharis burwelli on Eucalypts in Taiwan	4
Symbiotic Algae of Acoel Species in the Seto Inland Sea and Symbiont Selectivity in the Hosts	3
A New Species of Prosadenoporus (Nemertea: Eumonostilifera) from the North-East Coast of the Bay of Bengal, India	3
Epicatechin Alters the Activity of a Neuron Necessary for Long-Term Memory of Aerial Respiratory Behavior in Lymnaea stagnalis	3
Feeding Strategy of Wild Japanese Martens (Martes melampus) in Northern Japan	3
A Predator-Elicited Vocalization in Male Japanese Bush Warblers: Temporal and Spatial Singing Patterns in Relation to Presence of Conspecific Females	3
The Growth Zones of Test Plates in Four Spatangoid Echinoid Species: Irregular Pattern	3
Molecular Characterization and Tissue Distribution of Calcineurin Regulatory B Subunit during the Prevention of Diapause in the Silkworm, Bombyx mori	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
Food Habits of the Japanese Dormouse in the Yatsugatake Mountains, Japan	3
Management of Nuisance Macromoths in Expressways through Academic-Industrial Collaboration: Light Trap Designed on the Basis of Moths' Preferences for Light Attributes	3
Possible Role of Polarized Light Information in Spatial Recognition in the Cricket Gryllus bimaculatus	3
A Taxonomic List of Sea Spiders (Arthropoda, Pycnogonida) from Japanese Waters	3
Three New Earthworm Species of the Genera Amynthas and Metaphire (Oligochaeta: Megascolecidae) From Leshan, China	3
Visual Perception of Density and Density-Dependent Growth in Medaka (Oryzias latipes): A Suitable Model for Studying Density Effects in Fish	3
New Records of Azooxanthellate Scleractinian Corals (Cnidaria: Anthozoa) from Sagami Bay and Suruga Bay, Japan	3
Canonical and Non-Canonical Functions of Erythropoietin and Its Receptor in Mature Nucleated Erythrocytes of Western Clawed Frog, Xenopus tropicalis	3
A New Heteronemertean Genus with Variable Potential of Anterior Regeneration for Species Formerly Belonging to Lineus (Nemertea: Pilidiophora)	3
The Bryozoan Cauloramphus magnus (Cheilostomata: Calloporidae) in Northern Japan Includes Multiple, Co-occurring Cryptic Species	3
Genetic Analysis Reveals Dispersal Patterns of Japanese Serow in Two Different Habitats of a Mountainous Region	3
Transcriptomes of Giant Sea Anemones from Okinawa as a Tool for Understanding Their Phylogeny and Symbiotic Relationships with Anemonefish	3
Phenotypic Plasticity of Salamander Hatchlings in the Pre-Feeding Stage in Response to Future Prey	3
A Manually Curated Gene Model Set for an Ascidian, Ciona robusta (Ciona intestinalis Type A)	3
Association of Aquaporin 7 and 9 with Obesity and Fatty Liver in db/db Mice	3
Circadian Rhythm and Endocrinological Control on the Swimming and Sand Burrowing Behaviors of Japanese Sand Lances Ammodytes spp. (Uranoscopiformes, Ammodytidae)	2
Metabolic Water As a Route for Water Acquisition in Vertebrates Inhabiting Dehydrating Environments	2
Fusceulimoides kohtsukai gen. et sp. nov., a Minute Eulimid Gastropod Parasitic on the Little Brittle Star Ophiactis savignyi in Central Japan	2
A New Polychaete, Scolelepis (Parascolelepis) Brunnea sp. nov. (Annelida: Spionidae), from Korea	2
The Compound Eye Regulates Free-Running Period and Stability of the Circadian Locomotor Rhythm in the Cricket Gryllus bimaculatus	2
Dynamics of Laterality in the Cuttlefish Sepia recurvirostra through Interactions with Prey Prawns	2
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
Temporal Changes in Demography and Genetic Diversity of Oriental Storks at the Stage of Long-Term Captive Propagation and Reintroduction Initiation	2
Ovarian Development and Larval Release of the Hermit Crab Clibanarius eurysternus (Hilgendorf, 1879) (Decapoda: Anomura: Diogenidae) in Okinawa, Japan	2
Occurrence of Cruzia tentaculata Larvae in the Land Snail Megalobulimus abbreviatus—Influence of Natural Parasite Load on Snail Physiology	2
Metabolic and Hormonal Changes Associated with Vitellogenesis in Salvator merianae Lizards	2
Temperature Acclimation and Cold Tolerance in Caenorhabditis Elegans are Regulated by Multiorgan Coordination	2
Lineid Heteronemerteans (Nemertea: Pilidiophora) from Sagami Bay, Japan, with Some Proposals for the Family-Level Classification System	2
Ovarian Follicle Development in Ascidians	2
Sperm Size Decreases With Increasing Pheomelanin Pigmentation but Not With the Amount of Glutathione in the Barn Swallow	2
A New Species of the Blind Cave Loach Genus Protocobitis (Cypriniformes: Cobitidae), Protocobitis longicostatus sp. nov., from Guangxi, China	2
Analysis of Genetic Structure and Genetic Diversity in Japanese Black Kite Population Using mtDNA	2
Time-Comparator Neural Circuits of Gymnotiform Electric Fishes	2
Satellite Tracking of Migration Routes of the Eastern Buzzard (Buteo japonicus) in Japan through Sakhalin	2
Contrasting Size Distributions among the Wing Spots of a Pierid Butterfly Suggest Different Selective Histories	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
CRISPR-Cas9-Mediated Gene Knockout in a Non-Model Sea Urchin, Heliocidaris crassispina	2
Are Amphibian Eggs a Precious Food Resource for Cynops pyrrhogaster (Amphibia: Urodela) in Spring?	2

Convergent Gene Duplication in Arctic and Antarctic Teleost Fishes	2
Acoustic Characteristics of Songs in a Recently Established Population of the Japanese Bush Warbler on an Oceanic Island	2
Photoperiodism of Diapause Induction in the Silkworm, Bombyx mori	2
Oxytocin/Vasopressin-Like Peptide in the Central Nervous System and Ovaries of the Mud Crab Scylla olivacea	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
Phototaxis in Two Shallow-Water Zeuxo Species (Crustacea: Tanaidacea)	1
Steller Sea Lion (Eumetopias jubatus) at Tuleny Island, Russia in Autumn 2018: Abundance, Composition, and Entanglement	1
Male Guppies Recognize Familiar Conspecific Males by Their Face	1
A CatSper-Uninvolved Mechanism to Induce Forward Sperm Motility in the Internal Fertilization	1
Use of Visual Information by Ant Species Occurring in Similar Urban Anthropogenic Environments	1
A Relaxin-Like Gonad-Stimulating Peptide Appears in the Early Development of the Starfish Patiria pectinifera	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
Decreased Diversity and Abundance of Marine Invertebrates at CO2 Seeps in Warm-Temperate Japan	1
Description of a New Species of Hua (Gastropoda: Semisulcospiridae) from Guizhou, China, Based on Morphology and Molecular Evidence	1
Sacculina-Induced Morphological Feminization in the Grapsid Crab Pachygrapsus crassipes	1
Periodic Stretching of Cultured Myotubes Enhances Myofibril Assembly	1
Cloning and Characterization of Cyp7a1 and Cyp27a1 Genes from the Non-Parasitic Japanese Lamprey Lethenteron reissneri	1
Immunohistochemical Characterization of the Development of Long Photoreceptor Cells in the Lamprey Retina	1
CD34 is Expressed in Endothelial Cells in Embryonic Testes and is Additionally Expressed in Non-Endothelial Cells in Postnatal Mouse Testes	1
Teratorn and Its Related Elements – a Novel Group of Herpesviruses Widespread in Teleost Genomes	1
Host Size Selection in the Ectoparasite Tachaea chinensis (Isopoda: Corallanidae) under Laboratory Conditions	1
A New Species of Small Water Strider in the Genus Microvelia (Hemiptera: Heteroptera: Veliidae) from Aichi Prefecture, Honshu, Japan	1
Environmental Adaptation in Animals	1
CRISPR/Cas9- and Single-Stranded ODN-Mediated Knock-In in Silkworm Bombyx mori	1
Polydendrorhynchus amaleshii sp. nov., a New Species With Branched Proboscis (Nemertea: Heteronemertea) From the North-East Coastal Bay of Bengal	1
Transcriptome Analysis in a Scleractinian Coral, Acropora tenuis, during the Spawning Season With Reference to the Gonadal Condition	1
Observations on Predation in Paranthura japonica Richardson, 1909 (Isopoda: Cymothoida: Paranthuridae)	1
Morphological Study of Left–Right Head Asymmetry in Doubledaya bucculenta (Coleoptera: Erotylidae: Languriinae)	1
Electromyography of Flight Muscles in Free-Flying Chestnut Tiger Butterfly, Parantica sita	1
Genetic Disruption of cyp21a2 Leads to Systemic Glucocorticoid Deficiency and Tissues Hyperplasia in the Teleost Fish Medaka (Oryzias latipes)	1
Tima nigroannulata (Cnidaria: Hydrozoa: Eirenidae), a New Species of Hydrozoan from Japan	1
Growth-Promotion Effects of Dissolved Amino Acids in Three Species of Hynobius Salamander Hatchlings	1
Phylogeographic History of Endangered Hokuriku Salamander, Hynobius takedai (Amphibia: Caudata)	1
Guiding Light: Mechanisms and Adjustments of Environmental Light Interpretation with Insights from Platynereis dumerilii and Other Selected Examples	1
A New Species of Sea Whip Gorgonian-Associated Zoantharian (Cnidaria: Anthozoa: Hexacorallia: Parazoanthidae) from the Ryukyu Islands, Japan, with Subgeneric Subdivision of Genus Umimayanthus	1
Cloning and Expression Analysis of TGF-β Type I Receptor Gene in Hyriopsis cumingii	1
In Vitro Phagocytosis of Different Dinoflagellate Species by Coral Cells	1
Medaka Terb1 Mutant Displays Defects of Synaptonemal Complex Formation and Sexual Difference in Gametogenesis	1
Ancient Admixture in Freshwater Halfbeaks of the Genus Nomorhamphus in Southeast Sulawesi	1
Microfocus X-Ray Computed Tomography of Paraplanocera oligoglena (Platyhelminthes: Polycladida) with an Evaluation of Histological Sections After Scanning	1
Taxonomic Accounts and Phylogenetic Positions of the Far East Asian Centipedes Scolopocryptops elegans and S. curtus (Chilopoda: Scolopendromorpha)	1
New Species of Lower-Shelf to Upper-Slope Ctenostome Bryozoans from Pacific Japan, with a Family Range Extension	1
Establishment of a New Model Sea Anemone for Comparative Studies on Cnidarian-Algal Symbiosis	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
First Record of Elasmobranch Hosts for the Gnathiid Isopod Crustacean Thaumastognathia: Description of Thaumastognathia bicorniger sp. nov.	1
Developmental Staging of Sexual Egg Formation in Daphnia pulex: Unmated Females Resorb Meiotic Oocytes to Resist Starvation	1
Patterns of Sexual Dimorphism, Static Allometry, and Modularity in the Skull of the Ethiopian White-Footed Mouse, Stenocephalemys albipes (Rodentia: Muridae)	1
Comparative Phylogenetic Study on Host Newts (Caudata: Salamandridae) and Parasitic Mites (Acariformes: Hydrachnidia: Hygrobatidae) in East and Southeast Asia	1
Analysis of Genetic Structure and Genetic Diversity in Japanese Grey-Headed Lapwing Population Using mtDNA	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
Dive Deep: Bioenergetic Adaptation of Deep-Sea Animals	1
Update on Feeding Regulation by Ghrelin in Birds: Focused on Brain Network	1
Corrigenda	1
Effect of Natural Seasonal Changes in Photoperiod and Temperature on Immune Function in Striped Hamsters	1
Comparative Study of Gamma Radiation Tolerance between Desiccation-Sensitive and Desiccation-Tolerant Tardigrades	1
A New Species of Pseudostrandesia Savatenalinton and Martens, 2009 (Ostracoda, Crustacea) Collected from Two Pet Shops in Central Japan: an Alien Species?	1
Ontogenetic Expression of Aquaporins in the Kidney and Urinary Bladder of the Japanese Tree Frog, Dryophytes japonicus	1
Segment-Dependent Gene Expression Profiling of the Cartilaginous Fish Nephron Using Laser Microdissection for Functional Characterization of Nephron at Segment Levels	1