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Effect of feeding on the structure of the digestive gland of the tropical sepioid Idiosepius pygmaeus

Citation

Semmens, JM and Moltschaniwskyj, NA and Alexander, G, Effect of feeding on the structure of the digestive gland of the tropical sepioid Idiosepius pygmaeus, Journal of the Marine Biological Association of the UK, 75, (4) pp. 885-897. ISSN 0025-3154 (1995) [Refereed Article]

DOI: doi:10.1017/S0025315400038224

Abstract

The digestive gland of the tropical sepioid Idiosepius pygmaeus (Steenstrup) (Cephalopoda: Idiosepiidae) is characterized by a single cell type which secretes proteinaceous spherical bodies, the secretory spheres. Changes in the structure of the gland with feeding were investigated through a field sampling programme and a laboratory feeding experiment. Specimens were collected in the field on three consecutive days. There was a significant increase in the number of spheres during the day. A laboratory-based night trial showed that numbers of secretory spheres remained high during the night. After feeding there was a rapid and marked increase in the number of secretory spheres, suggesting that upon registering a stimulus the digestive gland secretes large amounts of enzymes. The process is rapid with an increase in the number of secretory spheres detected 30 minutes after feeding. The major peak in numbers of spheres occurred one hour after feeding. A second peak occurred 16 hours after feeding, suggesting that there may be two phases to the digestive cycle. This study examined natural and experimental patterns in the digestive gland and estimated the time involved in the digestive activity of I. pygmaeus. © 1995, Marine Biological Association of the United Kingdom. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Fisheries Sciences not elsewhere classified
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Wild Caught
Objective Field:Fisheries - Wild Caught not elsewhere classified
Author:Semmens, JM (Associate Professor Jayson Semmens)
Author:Moltschaniwskyj, NA (Associate Professor Natalie Moltschaniwskyj)
ID Code:34298
Year Published:1995
Web of Science® Times Cited:12
Deposited By:TAFI - Marine Research Laboratory
Deposited On:2005-07-26
Last Modified:2011-11-17
Downloads:0

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