1,721,011 research outputs found
Dispersal and upstream migration of marked Anguillid eel, Anguilla japonica, elvers in the estuary of the Shuang River, Taiwan.
No full textFishery biology of mackerels with reference to oceanographic conditions in the coastal waters of Sagami Bay, part II fluctuations of catch and the sea conditions.
No full text
Fishery biology of mackerels with reference to oceanographic conditions in the coastal waters of Sagami Bay, part I shoals and movement.
No full textFishery biology of mackerels with reference to oceanographic conditions in the coastal waters of Sagami Bay, part III mechanism of the fluctuations of catches.
No full textSegregative migration of American and European eel as revealed by daily growth increments in otolith
No full textDistribution and abundance of spotted mackerel, Scomber australaicus Cuvier & Valenciennes, in the coastal waters of Japan, 1973-1978.
No full textVariable habitat use by Japanese eel: a behavioral plasticity or a heritable character ?
No full textSpecies identification of Anguilla eels by polymerase chain reaction /restriction fragment length polymorphism analysis of the gonadotropin II-beta subunit gene
No full textGonadotropin II beta-subunit gene (GTH II-β DNA) fragments of nine eel species of the genus Anguilla were amplified with specific oligonucleotides by polymerase chain reaction (PCR), and a single product was obtained from each species. In subsequent restriction fragment length polymorphism (RFLP) analysis of the PCR-amplified GTH II-β DNA, the restriction endonuclease Hpa II, Sph I and Nsi I gave restriction patterns that differed among 3 species, e.g., Anguilla japonica, A. bicolor bicolor and A. anguilla, with other six species of anguillid eels, e.g., A. rostrata, A. australis australis, A. reinhardti, A. celebesensis, A. marmorata, and A. bicolor pacifica. Our results suggest that the PCR/RFLP analysis provides a rapid and convenient method to discriminate eel species
Evidence of Flathead Mullet Mugil cephalus L. Spawning in Waters Northeast of Taiwan
No full textEvidence of flathead mullet Mugil cephalus L.
spawning in waters northeast of Taiwan. Zoological Studies 46(6): 717-725. A new spawning ground for flathead
mullet (Mugil cephalus L.) in waters northeast (NE) of Taiwan was identified using comparisons of the
maturation status of fish to that of well-known spawning grounds in waters southwest (SW) of Taiwan from 20
Nov. 2005 to 12 Jan. 2006. Similarities in hydrographical conditions between the NE and SW waters produced
concurrent oceanic fronts with 20-23°C isothermal lines, temperatures which are suitable for mullet spawning
in both areas. Mean fork length, body weight, the gonadosomatic index, and gonadal maturation of mullet in
the NE waters were all comparable to those in the SW waters in the spawning season around the winter solstice
(21 or 22 Dec.) ± 10 d. The gonadosomatic index of mullet in the NE waters significantly increased from <
0.5 at the beginning of the spawning season to greater than 21.0 for females and 19.0 for males at the peak of
the spawning season. Oocytes were all either late-stage vitellogenic or post-vitellogenic from mid-Dec. to mid-
Jan. In addition, a few individuals with hydrated oocytes or post-ovulatory follicles were also found. This evidence
suggests that waters NE of Taiwan are a suitable spawning ground for the flathead mullet
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