A5001232152- Crustacean biology and ecology
- Marine and fisheries research
- Aquaculture Nutrition and Growth
- Cephalopods and Marine Biology
- Fish biology, ecology, and behavior
- Chemical synthesis and alkaloids
- Coral and Marine Ecosystems Studies
- Fish Biology and Ecology Studies
- Marine Biology and Ecology Research
- Physiological and biochemical adaptations
- Fish Ecology and Management Studies
- Turtle Biology and Conservation
- Veterinary Pharmacology and Anesthesia
- Neurobiology and Insect Physiology Research
- Genetic diversity and population structure
- Avian ecology and behavior
- Marine Biology and Environmental Chemistry
- Algal biology and biofuel production
- Identification and Quantification in Food
- Aquatic life and conservation
- Plant and animal studies
- Parasite Biology and Host Interactions
- Reproductive biology and impacts on aquatic species
- Aquatic Ecosystems and Phytoplankton Dynamics
- Wildlife Conservation and Criminology Analyses
Tokyo University of Marine Science and Technology
2018-2025
Research Institute of Environment, Agriculture and Fisheries, Osaka Prefecture
2017-2019
Japan Fisheries Research and Education Agency
2007-2015
Tamano General Medical College
2010
BC Research (Canada)
1977
Abstract Limb autotomy is a common phenomenon among decapod crustaceans, with chelipeds being the appendages most frequently lost. The loss of can reduce mating success in males, as they play crucial role mate competition. Little known, however, about effects cheliped on reproductive performance female decapods. This laboratory study investigated number spawns, well and body size newly hatched larvae, females subjected to different conditions porcellanid crab Petrolisthes japonicus (De Haan,...
<title>Abstract</title> Post-capture defense is one of the antipredator tactics enabling prey animals to escape from predators after being captured. However, even with a successful escape, it likely that animal will suffer latent damage, reducing its post-escape survival and growth, due physical chemical contact accompanying predatory attack. Here, following engulfing attacks by fish subsequent rejection (escape because post- capture defense), effects on growth paralarvae <italic>Octopus...
Despite recent advances in culture technology for East Asian common octopus Octopus sinensis paralarvae using upwelling systems, securing suitable feed the is an unresolved issue. The zoea of swimming crab Portunus trituberculatus a good candidate paralarval because high fecundity adult females. To investigate effects supplying P. zoeae and their feeding method on paralarvae, we cultured with different combination ratios Artemia (10:0, 7:3, 5:5, 3:7 0:10), or without supplementing rotifers...
The red swamp crayfish Procambarus clarkii is native to northeastern Mexico and the south-central USA, it has expanded its distribution worldwide negatively impacted ecosystems in invaded regions. dynamics of P. populations have been studied as basis for development effective control measures against this invasive alien species. Adult males exhibit a cyclical dimorphism between two sexual morphotypes; reproductive form I large chelae non-reproductive II small chelae. However, whether females...
We evaluated the genetic diversity and demographic history of terrestrial hermit crabs Birgus latro Coenobita brevimanus using mtDNA COI sequence data (573 bp). Tissue samples from 163 individuals B. 63 C. were collected at 11 four localities in North-Western Pacific Region, respectively. Haplotype was high similar (0.8809) (0.9222). Nucleotide higher (0.01088) than (0.00404). No genealogical structure observed haplotypes whereas haplotype clades found brevimanus. Weak but significant...
We investigated the seasonal variability in fecundity and egg size a Petrolisthes japonicus population by monthly sampling for one year on an intertidal cobble boulder shore Boso Peninsula, Japan. Fecundity (number of eggs per brood) was determined ovigerous females with non-eyed or eyed early (May June), middle (July) late (August September) breeding periods. The long short diameters were measured, volume calculated. positively correlated female body found to be greater period than Egg loss...
Abstract Terrestrial hermit crabs in the family Coenobitidae (genera Coenobita and Birgus ) must migrate onto land after completing a pelagic larval stage ocean. Better knowledge of emigration behavior would assist conservation management coenobitid populations by helping identify protect habitats they need to complete their life cycles. We cultured laboratory‐born individuals five species ( cavipes , C. purpureus rugosus violascens, latro from megalopae early juveniles (first, second,...
Cheliped dimorphism is common in decapod crustaceans, and many decapods have a pair of different-sized chelipeds, i.e., one side being larger (major) than the other (minor), phenomenon known as heterochely. Anomuran crabs from family Porcellanidae exhibit true crab-like body shape, with relatively large chelipeds for their size, they show sexual size (i.e., males chelipeds). However, very little about heterochely porcellanid crabs. Therefore, we aim to elucidate cheliped crab Petrolisthes...
The present study aimed to elucidate the population dynamics of land hermit crabs on coast Boso Peninsula, Chiba Prefecture, Japan, which is northern limit their geographical distribution. We conducted monthly field surveys at four sites from April 2012 December 2014 and visually searched for crabs. Laboratory experiments were also evaluate overwintering ability two species, Coenobita purpureus C. rugosus, detected during surveys; adult laboratory-raised juveniles exposed low-temperature...
The occurrence of morphologically immature megalopae, which retain zoeal features such as dorsal spines and furcae telson, is closely correlated with larval mass mortality during seed production the swimming crab Portunus trituberculatus in Japanese hatcheries. To determine cause megalopal morphology, zoeae were reared various supplementary schedules density diets (rotifer, Artemia phytoplanktons including Chlorella vulgaris Nannochloropsis oculata). In addition, to assess relationship...
Abstract Replicating maternal care and incubating octopus embryos artificially is advantageous to improve access embryonic stages, split share broods, reduce the required space culture large quantities of embryos. However, without female adequate rearing systems, risk bacterial fungal infections can be high. This study evaluated potential effects low‐concentration sodium hypochlorite (NaOCl) as a disinfectant on survival, hatchling growth. Embryos holobenthic octopus, Amphioctopus fangsiao ,...
Abstract We investigated post-settlement growth patterns and sexual dimorphism in the carapace, pelon, cheliped dimensions of varunid crab Gaetice depressus (De Haan, 1833). reared crabs laboratory from hatching through megalopae to first tenth instars, measurements were made exuviae or specimens that successively molted. The males larger than females all instars. molt increments carapace width (CW) length (CL) did not differ between sexes; former decreased with growth, especially up ~3–4...