+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Developmental changes in specific gravity in the early stages of the Japanese flounder Paralichthys olivaceus

, : Developmental changes in specific gravity in the early stages of the Japanese flounder Paralichthys olivaceus. Nippon Suisan Gakkaishi. September; 605: 617-623

The specific gravities of larvae and juveniles of the Japanese flounder Paralichthys olivaceus were measured in a series of saline solutions of different specific gravities. The specific gravity increased gradually from 1.022 to 1.028 in the egg and prelarval stages and markedly from 1.028 to 1.060 in the postlarval period. It remained nearly constant after the completion of metamorphosis. In the early postlarval period, a diel change in specific gravity was detected temporarily, viz, day-increase and night-decrease, which was induced by a photocycle. The specific gravity of larvae reduced with decreasing specific gravity of the ambient water. From these results, it is suggested that ontogenetic changes in the buoyancy of larvae and juveniles of the flounder control their habitat transition. However, it seems to be necessary for the larvae having negative buoyancy, even at the pelagic phase, to swim actively upwards to maintain position in the water column and migrate vertically.


DOI: 10.2331/suisan.60.617

Other references

Hirschberg, G.G.; Froetscher, L.; Naeim, F., 1979: Iliolumbar syndrome as a common cause of low back pain: diagnosis and prognosis. Most cases of low back pain fall into the category of nonspecific low back pain in which no specific pathology can be detected by x-ray, laboratory tests, or biopsy. In the authors' experience about 50% of the patients falling into this group...

Manzoor I Khuda M.; Serajuddin A.S.M.; Anwarul Islam M.M.; Dey H.B., 1976: Scientific grading of jute part 6 determination of fats and waxes in the different grades of white and tossa variety of jute. Bangladesh Journal of Scientific & Industrial Research 11(1-4): 51-55

Efimova, E.V.; A.Z.ubi, A.M.; Kaithamana, S.; Dogan, R.E.; Martinez, O.; Prabhakar, B.S., 2002: Differential effects of IG20 and its splice isoform, DENN-SV, on cell proliferation and apoptosis. We recently cloned a novel human cDNA designated IG20. Further analysis indicated that there are at least seven different isoforms that are expressed in various combinations in both normal and cancer cells and tissues. The gene is located on chrom...

Wu, X-Bo.; Na, R-Hua.; Wei, S-Shan.; Zhu, J-Song.; Peng, H-Juan., 2013: Distribution of tick-borne diseases in China. As an important contributor to vector-borne diseases in China, in recent years, tick-borne diseases have attracted much attention because of their increasing incidence and consequent significant harm to livestock and human health. The most commonl...

Capua, I.; Terregino, C.; Cattoli, G.; Toffan, A., 2004: Increased resistance of vaccinated turkeys to experimental infection with an H7N3 low-pathogenicity avian influenza virus. A trial was performed to establish whether turkeys vaccinated against avian influenza with a vaccine containing a strain with a heterologous neuraminidase to the challenge virus required a higher infectious dose to develop infection than naïve bi...

Anto K.F.; Janardhan A.S., 1997: Metamorphic evolution of southern granulite terrain with special reference to Kambam Valley granulites and their link to Pan-African tectonothermal event. Gondwana Research Group Miscellaneous Publication 5: 9

Tejani, A.; Stablein, D.M.; Harmon, W.E.; Fine, R.N.; Alexander, S.R.; Kohaut, E.C., 1998: Dramatic improvement in cadaver donor graft survival of North American children. Journal of the American Society of Nephrology 9(PROGRAM AND ABSTR ISSUE): 701A, Sept

Anonymous, 2011: The genome sequence of Desulfatibacillum alkenivorans AK-1 a blueprint for anaerobic alkane oxidation. Desulfatibacillum alkenivorans AK-1 serves as a model organism for anaerobic alkane biodegradation because of its distinctive biochemistry and metabolic versatility. The D. alkenivorans genome provides a blueprint for understanding the genetic sys...

Gracia Jover, S.; Pérez Cañas, C.; Vavken, E., 1967: A case of meningitis cause by Salmonella javiana. Revista Latinoamericana de Microbiologia Y Parasitologia 9(1): 15-17

Latham, L., 1992: The diploma in profession studies in midwifery/advanced diploma in midwifery by distance learning. Learning at a distance. Midwives Chronicle 105(1254): 202-203