Journal article
Morphology of the rectal gland of the spiny dogfish (Squalus acanthias) shark in response to feeding
Canadian journal of zoology, Vol.87(5), pp.440-452
05/2009
Handle:
https://hdl.handle.net/2376/107065
Abstract
The morphology of the rectal gland was examined in spiny dogfish ( Squalus acanthias L, 1758) sharks fasted (1 week) or 6 and 20 h postfeeding. The morphology of the fasted gland showed a pattern reflecting a dormant physiology, with thick gland capsule, thick stratified epithelium, and secretory parenchyma with tubules of small diameter and lumen. The secretory cells of the tubular epithelium were enlarged and irregularly shaped with abnormally condensed or highly vacuolized cytoplasm containing numerous lysosomes. Early-stage apoptotic cells were not uncommon. Secretory cells showed signs of low activity, e.g., mitochondria with weakly stained matrix and small cristae, poorly branched infoldings of basolateral membranes, and microvesicle-free subapical cytoplasm. All characteristics examined changed significantly upon feeding, consistent with increased salt and fluid secretion: the outer capsule muscle layer and the stratified epithelium decreased in diameter; the tubules enlarged; the secretory cells showed extensive development of the basolateral membrane, more mitochondria, and abundant apical microvesicles. Secretory cell apical surface was increased. The minor differences between morphology in 6 and 20 h postfeeding indicated that changes took place rapidly and were complete by 6 h. Our results are discussed in the context of prior studies of metabolism, proteomics, and cellular pathways of gland activation.
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Details
- Title
- Morphology of the rectal gland of the spiny dogfish (Squalus acanthias) shark in response to feeding
- Creators
- Victoria Matey - Department of Biology, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182-4614, USA., Department of Biology, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4K1, Canada., Department of Animal Science, University of California Davis, 1 Shields Avenue, Davis, CA 95616, USA., Division of Marine Biology and Fisheries, Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149, USA., Bamfield Marine Sciences Centre, 100 Pachena Drive, Bamfield, BC V0R 1B0, CanadaChris M Wood - Department of Biology, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182-4614, USA., Department of Biology, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4K1, Canada., Department of Animal Science, University of California Davis, 1 Shields Avenue, Davis, CA 95616, USA., Division of Marine Biology and Fisheries, Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149, USA., Bamfield Marine Sciences Centre, 100 Pachena Drive, Bamfield, BC V0R 1B0, CanadaW. Wesley Dowd - Department of Biology, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182-4614, USA., Department of Biology, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4K1, Canada., Department of Animal Science, University of California Davis, 1 Shields Avenue, Davis, CA 95616, USA., Division of Marine Biology and Fisheries, Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149, USA., Bamfield Marine Sciences Centre, 100 Pachena Drive, Bamfield, BC V0R 1B0, CanadaDietmar Kültz - Department of Biology, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182-4614, USA., Department of Biology, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4K1, Canada., Department of Animal Science, University of California Davis, 1 Shields Avenue, Davis, CA 95616, USA., Division of Marine Biology and Fisheries, Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149, USA., Bamfield Marine Sciences Centre, 100 Pachena Drive, Bamfield, BC V0R 1B0, CanadaPatrick J Walsh - Department of Biology, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182-4614, USA., Department of Biology, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4K1, Canada., Department of Animal Science, University of California Davis, 1 Shields Avenue, Davis, CA 95616, USA., Division of Marine Biology and Fisheries, Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149, USA., Bamfield Marine Sciences Centre, 100 Pachena Drive, Bamfield, BC V0R 1B0, Canada
- Publication Details
- Canadian journal of zoology, Vol.87(5), pp.440-452
- Academic Unit
- Biological Sciences, School of
- Identifiers
- 99900546526901842
- Language
- English
- Resource Type
- Journal article