نتایج جستجو برای: gill histopathology

تعداد نتایج: 33176  

Journal: :Archives and Records 2021

Journal: :American journal of physiology. Regulatory, integrative and comparative physiology 2001
G A Fines J S Ballantyne P A Wright

In elasmobranch fishes, urea occurs at high concentrations (350-600 mM) in the body fluids and tissues, where it plays an important role in osmoregulation. Retention of urea by the gill against this huge blood-to-water diffusion gradient requires specialized adaptations to the epithelial cell membranes. Experiments were performed to determine the mechanisms and structural features that facilita...

2016
Edward J Catapane Michael Nelson Trevon Adams Margaret A Carroll

Gill lateral cells of Crassostrea virginica are innervated by the branchial nerve, which contains serotonergic and dopaminergic fibers that regulate cilia beating rate. Terminal release of serotonin or dopamine results in an increase or decrease, respectively, of cilia beating rate in lateral gill cells. In this study we used the voltage sensitive fluorescent probe DiBAC4(3) to quantify changes...

Journal: :American journal of physiology. Regulatory, integrative and comparative physiology 2007
Goro Nishimoto Go Sasaki Eishin Yaoita Masaaki Nameta Huiping Li Kyoko Furuse Hidehiko Fujinaka Yutaka Yoshida Akihisa Mitsudome Tadashi Yamamoto

Hagfish (Eptatretus burgeri) are agnathous and are the earliest vertebrates still in existence. Pavement cells adjacent to the mitochondria-rich cells show orthogonal arrays of particles (OAPs) in the gill of hagfish, a known ultrastructural morphology of aquaporin (AQP) in mammalian freeze-replica studies, suggesting that an AQP homolog exists in pavement cells. We therefore cloned water chann...

Journal: :Comparative biochemistry and physiology. Toxicology & pharmacology : CBP 2008
Yung-Che Tseng Pung-Pung Hwang

A sufficient and timely energy supply is a prerequisite for the operation of iono- and osmoregulatory mechanisms in fish. Measurements of whole-fish or isolated-gill (or other organs) oxygen consumption have demonstrated regulation of the energy supply during acclimation to different osmotic environments, and such regulation is dependent on species, the situation of acclimation or acclimatizati...

2005
Janaina Rigonato Mário Sérgio Mantovani Berenice Quinzani Jordão

The comet assay was used to study the sensitivity of the widely distributed freshwater bivalve mollusk Corbicula fluminea to the DNA-damaging alkylating-agent methylmethane sulfonate (MMS). This study was undertaken to ascertain if C. fluminea is a good bioindicator of pollutants in aquatic environments and identify which C. fluminea tissue is most effective and practical for genotoxicity studi...

Journal: :The Journal of experimental biology 2007
Laetitia Serrano Kenneth M Halanych Raymond P Henry

Two isoforms of the enzyme carbonic anhydrase (CA) in the blue crab gill, CasCAg and CasCAc, were identified, sequenced, and found to match the membrane-associated and cytoplasmic isoforms, respectively. The membrane-associated isoform is present in much higher levels of mRNA expression in both anterior and posterior gills in crabs acclimated to high salinity (35 p.p.t.), but expression of the ...

Journal: :The International journal of developmental biology 1999
T Suzuki A S Srivastava T Kurokawa

Hox genes are expressed in domains with clear anterior borders exhibiting 3'-->5' hierarchy in hindbrain and in the pharyngeal area commonly in vertebrate embryos. Teleost embryos form seven pharyngeal arches, the mandibular arch, hyoid arch and the gill arches 1-5. We previously reported that, in Japanese flounder (Paralichthys olivaceus) embryos, Hoxd-4 is expressed from rhombomere 7 to the s...

Journal: :Journal of fish biology 2015
J T Kelly D T Lerner M F O'Dea A M Regish M Y Monette J P Hawkes K H Nislow S D McCormick

Field studies were conducted to determine levels of gill aluminium as an index of acidification effects on migrating Atlantic salmon Salmo salar smolts in the north-eastern U.S.A. along mainstem river migration corridors in several major river basins. Smolts emigrating from the Connecticut River, where most (but not all) tributaries were well buffered, had low or undetectable levels of gill alu...

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