Wiley

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Nuclear basic protein changes during spermiogenesis in the longnose skate and the spiny dogfish
Wiley - Tập 212 Số 3 - Trang 423-433 - 1980
Niels C. Bols, S.A. Boliska, J. B. Rainville, Harold E. Kasinsky
AbstractNuclear shape and the organization of nuclei within the seminiferous follicles have been used to divide spermiogenesis in the longnose skate, Raja rhina, into eight stages and in the spiny dogfish, Squalus acanthias, into seven stages. Cytochemical techniques for basic proteins reveal that as spermatid nuclei begin to elongate they have the somatic histone complement, and as they complete ... hiện toàn bộ
On the diversity of sperm histones in the vertebrates: II. A cytochemical study of the basic protein transitions during spermiogenesis in the cartilaginous fish Hydrolagus colliei
Wiley - Tập 198 Số 1 - Trang 109-113 - 1976
Niels C. Bols, Harold E. Kasinsky
AbstractSpermiogenesis in the ratfish (Hydrolagus colliei) is characterized by unusual changes in the basic proteins of the nucleus. Cytochemical analysis indicates that early spermatids in this cartilaginous fish contain the somatic type of histones. However, late spermatids contain the salmon type of sperm histone whereas spermatozoa display the mouse/grasshopper type designated by Bloch ('69). ... hiện toàn bộ
The time course of seawater acclimation in Fundulus heteroclitus L.
Wiley - Tập 228 Số 1 - Trang 33-39 - 1983
William F. Jacob, Malcolm H. Taylor
AbstractSerum Na+ and osmolality increased significantly within 12–24 hours after transfer of Fundulus heteroclitus to seawater (SW) but returned to freshwater (FW) levels after 4 days in SW. Na+K+‐adenosine triphosphatase (ATPase) remained low during the first 2 days in SW but increased to a level characteristic of fully acclimated fish within 4 days. Serum cortisol did not display a marked eleva... hiện toàn bộ
Fish gill morphology: inside out
Wiley - Tập 293 Số 3 - Trang 192-213 - 2002
Jonathan M. Wilson, Pierre Laurent
AbstractIn this short review of fish gill morphology we cover some basic gross anatomy as well as in some more detail the microscopic anatomy of the branchial epithelia from representatives of the major extant groups of fishes (Agnathans, Elasmobranchs, and Teleosts). The agnathan hagfishes have primitive gill pouches, while the lampreys have arch‐like gills similar to the higher fishes. In the la... hiện toàn bộ
Na+, Cl−, Ca2+ and Zn2+ transport by fish gills: retrospective review and prospective synthesis
Wiley - Tập 293 Số 3 - Trang 264-283 - 2002
William S. Marshall
AbstractThe secondary active Cl− secretion in seawater (SW) teleost fish gills and elasmobranch rectal gland involves basolateral Na+,K+‐ATPase and NKCC, apical membrane CFTR anion channels, and a paracellular Na+‐selective conductance. In freshwater (FW) teleost gill, the mechanism of NaCl uptake is more controversial and involves apical V‐type H+‐ATPase linked to an apical Na+ channel, apical Cl... hiện toàn bộ
Dynamics of Na+,K+,2Cl− cotransporter and Na+,K+‐ATPase expression in the branchial epithelium of brown trout (Salmo trutta) and atlantic salmon (Salmo salar)
Wiley - Tập 293 Số 2 - Trang 106-118 - 2002
Christian K. Tipsmark, Steffen S. Madsen, Michel Seidelin, Akim Stypinsky Christensen, Christopher P. Cutler, Gordon Cramb
AbstractThe dynamics of branchial Na+,K+,2Cl− cotransporter (NKCC) and Na+,K+‐ATPase (NKA) expression were investigated in brown trout and Atlantic salmon during salinity shifts and the parr‐smolt transformation, respectively. In the brown trout, Western blotting revealed that NKCC and NKA abundance increased gradually and in parallel (30‐ and ten‐fold, respectively) after transfer to seawater (SW... hiện toàn bộ
Dual functional and structural properties of the interhyoideus muscle of the bullfrog tadpole (Rana catesbeiana)
Wiley - Tập 176 Số 2 - Trang 193-218 - 1971
Norman Gradwell, B. Walcott
AbstractEvidence is presented for the existence of two different types of striated muscle fiber in discrete contiguous bundles in the interhyoideus muscle of the bullfrog tadpole. These tow types of muscle fiber share certain properties with conventional slow and fast contracting muscle of other vertebrates. The continuous, rhythmic activity of the pink fibers drives the buccal force pump, whereas... hiện toàn bộ
Effect of sensory input from the tongue on jaw movement in normal feeding in the opossum
Wiley - Tập 250 Số 3 - Trang 233-243 - 1989
A.J. Thexton, A. W. Crompton
AbstractOpossums were presented with solid and liquid foods. The movements of the jaw and tongue were recorded cineradiographically together with recordings of the EMG activity in muscles opening the jaw and moving the base of the tongue (hyoid). The jaw opening in each cycle was in two stages–01 and 02; 01 had a constant amplitude irrespective of the food ingested. Ingestion of liquid (which invo... hiện toàn bộ
RNA in Cecropia moth ovaries: Sites of synthesis, transport, and storage
Wiley - Tập 170 Số 1 - Trang 1-23 - 1969
Sylvia B. Pollack, William H. Telfer
AbstractAzure B staining of Cecropia moth ovarian follicles indicated that the pattern of RNA concentrations characteristic of vitellogenic oocytes is disrupted by a gross redistribution and dispersion, beginning with the final discharge of the cytoplasm of the nurse cells into the oocyte. The cytoplasmic redistribution is largely complete two days later when chorion formation begins, the germinal... hiện toàn bộ
The regulation of ovulation in the tsetse‐fly, Glossina pallidipes Austen
Wiley - Tập 177 Số 4 - Trang 447-454 - 1971
Thomas R. Odhiambo
AbstractThe tsetse‐fly female matures a single oocyte at a time. It ovulates this into the uterus, where it hatches, develops into a fully‐grown larva, and is later larviposited by the mother. It is only then that the next mature oocyte is ovulated, and the whole sequence is repeated. Thus, in this insect, it is possible to differentiate clearly four processes of egg production: (1) oogenesis, (2)... hiện toàn bộ
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