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Development of digestive secretions in white sturgeon juveniles (Acipenser transmontanus) |
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| Authors: | R K Buddington S I Doroshov |
| Affiliation: | 1. Department of Biology, University of Ottawa, Ottawa K1N 6N5, ON, Canada;2. Department of Zoology, University of British Columbia, Vancouver V6T 1Z4, BC, Canada;3. Bamfield Marine Sciences Centre, Bamfield V0R 1B0, BC, Canada;1. MARBEC, Université Montpellier, UM-CNRS-IRD-IFREMER, cc 092, Place E. Bataillon, 34095 Montpellier, Cedex 05, France;2. Department of Anatomy, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kawasaki 216-8511, Japan;1. Department of Biological Sciences, University of Alberta, 11455 Saskatchewan Drive, Edmonton, Alberta T6G 2E9, Canada;2. Bamfield Marine Science Centre, Bamfield, BC, Canada |
| Abstract: | Development of the digestive enzyme complement corresponded with this species' carnivorous habits and a natural dietary shift at metamorphosis from larval pelagic zooplanktivory to benthic carnivory. During the first developmental stanza when the digestive tract was differentiating and the larvae were dependent on endogenous nutritional reserves, digestive enzyme concentrations were low. Initiation of gastric secretion (pepsin and acid) was concomitant with onset of exogenous feeding. Highest amylolytic and lipolytic activities were recorded from feeding larvae prior to their metamorphosis to juveniles. |
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