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Developmental changes in foregut functioning of packhorse lobster, Jasus (Sagmariasus) verreauxi (Decapoda : Palinuridae), phyllosoma larvae

Citation

Cox, SL and Johnston, DJ, Developmental changes in foregut functioning of packhorse lobster, Jasus (Sagmariasus) verreauxi (Decapoda : Palinuridae), phyllosoma larvae, Marine and Freshwater Research, 55, (2) pp. 145-153. ISSN 1323-1650 (2004) [Refereed Article]

DOI: doi:10.1071/MF03175

Abstract

The development of foregut structure and digestive function was examined in Jasus (Sagmariasus) verreauxi phyllosomas (instars 1-13) using resin histology and video analysis. Early instar (1-3) phyllosoma had very simple anterior foreguts with little differentiation into ventral and dorsal chambers, no filter press and small lateral comb-row setae. By mid instars (4-7), the filter press had developed and ventral and dorsal chambers of the foregut were distinct. The number and robustness of lateral setae had increased and a dense mat of anterior floor setae had formed. The filter press became increasingly complex in later-instar (8-13) larvae and dense robust lateral comb-row setae, main brushes and a thick mat of anterior floor setae forming longitudinal channels had developed by this stage. The mechanism of food digestion remained similar between instars but changes in foregut structures suggest that the degree of internal mastication, filtration and capacity to sort and mix particles improved with age. This research has implications for artificial diet development in crustacean culture and understanding dietary shifts during larval development.

Item Details

Item Type:Refereed Article
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Aquaculture
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Aquaculture
Objective Field:Fisheries - Aquaculture not elsewhere classified
Author:Johnston, DJ (Dr Danielle Johnston)
ID Code:29853
Year Published:2004
Web of Science® Times Cited:12
Deposited By:TAFI - Aquaculture
Deposited On:2004-08-01
Last Modified:2005-05-02
Downloads:0

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