A New Population of the Amphioxus (Branchiostoma belcheri) in the Enshu-Nada Sea in Japan(General)

スポンサーリンク

概要

• 論文の詳細を見る

• The amphioxus, Branchiostoma belcheri, is currently listed in the registry of "Endangered Animals of Japanese Marine and Fresh Water Organisms" issued by the Japan Fisheries Resource Conservation Association. We surveyed a new population of this species in an area near the Irago Channel and the Enshu-Nada Sea in Aichi Prefecture, Japan. This population was originally discovered by a research group of the Aichi Fisheries Research Institute when they were collecting Japanese sand lances (Ammodytes personatus) in this area. Every month from June to November of 1995 with the exception of October, we collected amphioxi and sand lances in an area of about 1 km2 to study the population profile of the amphioxus and the relation between these two animals. The newly discovered population of the amphioxus was suspected to be larger than any other Japanese populations of this species. Animals of this population could be divided into two groups according to body size distribution: those of approximately 20 mm long on the average (termed small) and those of approximately 50 mm long on the average (termed large). No small amphioxus was found in June; 10% or fewer of the animals were of small size in July and August; and about 40% of the animals were of small size in September and November. The breeding season was estimated to last from June (or earlier) to August based on observation of the gonadal size. Amphioxi share a habitat with sand lances, which stay in the sand during the summer dormant period. The newly discovered amphioxus population may provide an important source of material for modern biological researches on Cephalochordata in Japan, although special care for protection of this population should be taken.

• 社団法人日本動物学会の論文
• 1998-10-15

著者

• KUBOKAWA Kaoru

  Ocean Research Institute, University of Tokyo

• Kubokawa Kaoru

  Department Of Molecular Biology Ocean Research Institute The University Of Tokyo

• Azuma Nobuyuki

  Faculty Of Agriculture And Life Science Hirosaki University

• Kubokawa kaoru

  Misaki Marine Biological Station

• TOMIYAMA Minoru

  Marine Resources Research Center. Aichi Fisheries Research Institute

• Kubokawa Kaoru

  Ocean Res. Inst. Univ. Of Tokyo

• Tomiyama Minoru

  Marine Resources Research Center Aichi Fisheries Research Institute

• Tomiyama Minoru

  Marine Resource Research Center Aichi Fisheries Research Institute

• Kubokawa K

  Department Of Molecular Biology Ocean Research Institute The University Of Tokyo

関連論文

• Molecular approach to species identification of eggs with respect to determination of the spawning site of the Japanese eel Anguilla japonica
• ANALYSIS OF SEX STEROID BIOSYNTHESIS IN THE AMPHIOXUS OVARY(Endocrinology,Abstracts of papers presented at the 76^ Annual Meeting of the Zoological Society of Japan)
• Phylogenetic analyses in cetacean species of the family Delphinidae using a short wavelength sensitive opsin gene sequence
• AN ACROSOME REACTION IN SPERMATOZOA FROM THE AMPHIOXUS, BRANCHIOSTOMA BELCHERI(Developmental Biology,Abstracts of papers presented at the 75^ Annual Meeting of the Zoological Society of Japan)
• Acrosome Reaction in Spermatozoa from the Amphioxus Branchiostoma belcheri(Cephalochordata, Chordata)(Physiology)
• Gonadal State of Wild Amphioxus Populations and Spawning Success in Captive Conditions during the Breeding Period in Japan(Ecology)
• ANALYSIS OF SPONTANEOUS SPAWNING OF AMPHIOXUS, BRANCHIOSTOMA BELCHERI, IN THE WATER TANK(Behavior Biology and Ecology)(Proceedings of the Seventy-Third Annual Meeting of the Zoological Society of Japan)
• SELFACT : SPERM MOTILTY-INITIATING SUBSTANCE RELEASED FROM THE SPERM OF AMPHIOXUS(Cell Biology and Morphology)(Proceedings of the Seventy-Third Annual Meeting of the Zoological Society of Japan)
• FIRST OBSERVATION ON SPAWNING OF AMPHIOXUS IN JAPAN(Behavior Biology and Ecology)(Proceeding of the Seventy-Third Annual Meeting of the Zoological Society of Japan)
• A Survey of Amphioxus (Cephalochordata: Branchiostoma belcheri) in the Offing of Misaki
• EST ANALYSIS OF GENE EXPRESSION IN NEURAL TUBE OF AMPHIOXUS(Endocrinology,Abstracts of papers presented at the 74^ Annual Meeting of the Zoological Society of Japan)
• Mitochondrial DNA Variation and Genetic Relationships of Branchiostoma Species from the Pacific and Atlantic Oceans
• Food sources for the bivalve Corbicula japonica in the foremost fishing lakes estimated from stable isotope analysis
• A New Population of the Amphioxus (Branchiostoma belcheri) in the Enshu-Nada Sea in Japan(General)
• CHARACTERIZATION OF CDNA CLONES ENCODING PHOTORECEPTOR PROTEIN(OPSIN) FROM CEPHALOCHORDATE LANCELET(Physiology)(Proceeding of the Seventy-Third Annual Meeting of the Zoological Society of Japan)
• Sex-specific Cortisol and Sex Steroids Responses in Stressed Sockeye Salmon during Spawning Period(Endocrinology)
• FUNCTIONAL CHARACTERISTICS OF TROPONIN IN AMPHIOXUS STRIATED MUSCLE(Cell Biology and Morphology,Abstracts of papers presented at the 76^ Annual Meeting of the Zoological Society of Japan)
• CHARACTERISTICS AND ANALYSIS OF SPAWNING PATTERN IN AMPHIOXUS(Behavior Biology and Ecology,Abstracts of papers presented at the 74^ Annual Meeting of the Zoological Society of Japan)
• FUNCTIONAL ANALYSIS ON DIVERGED RHODOPSINS IN THE AMPHIOXUS(Physiology,Abstracts of papers presented at the 75^ Annual Meeting of the Zoological Society of Japan)
• The Adrenocortical Response to Stress in Male Bush Warblers, Cettia diphone : A Comparison of Breeding Populations in Honshu and Hokkaido, Japan
• DISTRIBUTION OF EPIGONICHTHYS IN COASTS OF SOUTH WEST PACIFIC OCEAN IN JAPAN(Behavior Biology and Ecology)(Proceeding of the Seventy-Third Annual Meeting of the Zoological Society of Japan)
• ULTRASTRUCTURE OF AMPHIOXUS COLLECTED OFF CAPE NOMAMISAKI(Taxonomy and Systematics,Abstracts of papers presented at the 76^ Annual Meeting of the Zoological Society of Japan)
• Effect of temperature, age class, and growth on induction of aestivation in Japanese sandeel (Ammodytes personatus) in Ise Bay, central Japan
• MOLECULAR CLONING OF COMPLEMENTARY DEOXYRIBONUCLEIC ACIDS FOR PITUITARY GLYCOPROTEIN HORMONE α-SUBUNIT PRECURSOR MOLECULES IN AMPHIBIANS AND AUSTRALIAN LUNGFISH
• A FIELD SURVEY ON FLOW CHARACTERISTICS AND ASCENDING OF FISHES IN ICE-HARBOR TYPE FISHWAY OF MITUMENAI HEADWORKS
• EST ANALYSIS IN AMPHIOXUS NERVE CORD
• CLONING OF A MEMBER OF THE SMALL GTP-BINDING PROTEIN FAMILY FROM MASU SALMON BRAIN
• Hatschek's Pit: Its Endocrinological Significance
• Effects of Osmotic Stimulation on Expression of Neurohypophysial Hormone Genes in Pre-Spawning Chum Salmon

もっと見る 閉じる

スポンサーリンク