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Carotenoids in the tiger prawn Penaeus esculentus during ovarian maturation

Carotenoids in the tiger prawn Penaeus esculentus during ovarian maturation 227 123 123 3 3 W. Dall D. M. Smith L. E. Moore Division of Fisheries CSIRO Marine Laboratories P.O. Box 120 4163 Cleveland Queensland Australia Abstract Female Penaeus esculentus Haswell were collected by 15 to 20 min duration trawls during 1990. Carotenoids were analysed in the digestive gland, abdominal muscle, the remainder of the body (hereafter called “integument”) and ovary of prawns in Stage 2 through Stage 4 (fully mature) of maturation. The only oxycarotenoids (xanthophylls) identified were astaxanthins or astaxanthin esters; occasionally low levels of β-carotene were detected in the digestive gland. The concentrations of astaxanthin monoesters (AM) and diesters (AD) were highest, with only minor amounts of free astaxanthins (Ast), except in the maturing ovaries, where free astaxanthins predominated (up to 80% of the total carotenoid). Of the total carotenoid, 82 to 94% was in the integument, but at maturity the digestive gland contained 10.7±3.4% and the ovary 5.6±0.9% of the total carotenoid. Only the ovary increased in mass during maturation, reaching up to 5.2% of total prawn mass. During this period, digestive gland concentrations of AM, AD and Ast all increased (tota 20 to 120 μg g -1 ); levels in the muscle and integument varied little throughout maturation (total ∼0.4 and 100 μg g -1 , respectively); ovary AM levels remained low throughout (1.5 to 1.2 μg g -1 ), AD increased from only 2 to 5 μg g -1 , but Ast increased from 2 to 34 μg g -1 . Apart from the ovary, AM concentrations were the most variable. In common with other decapod Crustacea, the maturing ovary of P. esculentus contained high levels of carotenoids, indicating that these may have an important role in early development. The natural diet of P. esculentus includes a variety of carotenoids, but except for a little β-carotene, the digestive gland, where absorption occurs, contained astaxanthins, with only an occasional trace of β-carotene. This suggests that the conversion of dietary carotenoids to astaxanthin occurs soon after ingestion. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Marine Biology Springer Journals

Carotenoids in the tiger prawn Penaeus esculentus during ovarian maturation

Marine Biology , Volume 123 (3) – Sep 1, 1995

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References (25)

Publisher
Springer Journals
Copyright
Copyright © 1995 by Springer-Verlag
Subject
Life Sciences; Biomedicine general; Oceanography; Ecology; Microbiology; Zoology
ISSN
0025-3162
eISSN
1432-1793
DOI
10.1007/BF00349222
Publisher site
See Article on Publisher Site

Abstract

227 123 123 3 3 W. Dall D. M. Smith L. E. Moore Division of Fisheries CSIRO Marine Laboratories P.O. Box 120 4163 Cleveland Queensland Australia Abstract Female Penaeus esculentus Haswell were collected by 15 to 20 min duration trawls during 1990. Carotenoids were analysed in the digestive gland, abdominal muscle, the remainder of the body (hereafter called “integument”) and ovary of prawns in Stage 2 through Stage 4 (fully mature) of maturation. The only oxycarotenoids (xanthophylls) identified were astaxanthins or astaxanthin esters; occasionally low levels of β-carotene were detected in the digestive gland. The concentrations of astaxanthin monoesters (AM) and diesters (AD) were highest, with only minor amounts of free astaxanthins (Ast), except in the maturing ovaries, where free astaxanthins predominated (up to 80% of the total carotenoid). Of the total carotenoid, 82 to 94% was in the integument, but at maturity the digestive gland contained 10.7±3.4% and the ovary 5.6±0.9% of the total carotenoid. Only the ovary increased in mass during maturation, reaching up to 5.2% of total prawn mass. During this period, digestive gland concentrations of AM, AD and Ast all increased (tota 20 to 120 μg g -1 ); levels in the muscle and integument varied little throughout maturation (total ∼0.4 and 100 μg g -1 , respectively); ovary AM levels remained low throughout (1.5 to 1.2 μg g -1 ), AD increased from only 2 to 5 μg g -1 , but Ast increased from 2 to 34 μg g -1 . Apart from the ovary, AM concentrations were the most variable. In common with other decapod Crustacea, the maturing ovary of P. esculentus contained high levels of carotenoids, indicating that these may have an important role in early development. The natural diet of P. esculentus includes a variety of carotenoids, but except for a little β-carotene, the digestive gland, where absorption occurs, contained astaxanthins, with only an occasional trace of β-carotene. This suggests that the conversion of dietary carotenoids to astaxanthin occurs soon after ingestion.

Journal

Marine BiologySpringer Journals

Published: Sep 1, 1995

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