Broodstock Nutrition of Australian Red Claw Crayfish Cherax Quadricarinatus (Von Martens)

A series of experiments were conducted to develop least cost feed formulations for red claw crayfish Cherax quadricarinatus broodstock based on the gonad, egg protein and essential amino acids content . All diets were developed using least cost feedstuffs and a linear interactive and discrete op...

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Main Author:	Asgari, Ladan
Format:	Thesis
Language:	English English
Published:	2004
Subjects:	Crayfish - Australia - Nutrition - Case studies
Online Access:	http://psasir.upm.edu.my/id/eprint/6128/1/FP_2004_13.pdf
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id	my-upm-ir.6128
record_format	uketd_dc
spelling	my-upm-ir.61282023-10-11T02:47:34Z Broodstock Nutrition of Australian Red Claw Crayfish Cherax Quadricarinatus (Von Martens) 2004-01 Asgari, Ladan A series of experiments were conducted to develop least cost feed formulations for red claw crayfish Cherax quadricarinatus broodstock based on the gonad, egg protein and essential amino acids content . All diets were developed using least cost feedstuffs and a linear interactive and discrete optimiser software (LINDO). Prior to evaluation of different formulated diets, the protein and amino acid contents of red claw crayfish broodstock tissues, eggs and newly hatched juvenile under a culture condition were analysed. Increases in ovarian and embryonic proteins content from 10.48 to 65.29 % were observed with the maturation stages of red claw crayfish C. quadricarinatus. These results emphasized the critical role of protein as a main structural component in - maturation. However, amino acid compositions of gonad and embryonic tissue of C. quadricarinatus were generally remained constent with the possible exception of histidine. A comparative study on performance of five dietary protein levels (30-50%) on red claw crayfish was carried out. Based on spawning rate, fecundity, s hatchability and egg size, a range of 40-45% crude protein and 16.72 kJ g-' (400 kcal 100 g-l) energy were the bestloptimal for red claw crayfish broodstock. Eessential amino acids index (EAAI) of all test diets (developed based on available least cost ingredients for red claw crayfish broodstock) were within the best range (0.960-0.996) recommended for crustaceans. Therefore, all test diets were best in terms of protein and essential amino acids sources. In term of biochemical composition, an increase in dietary protein l eve1 was a Iso i ncreased the protein content i n eggs a nd muscle. A positive relationship between dietary protein level and protein contents of eggs and muscle of red claw broodstock was found. A following study later showed that a diet providing 40% protein and 16.72 k~g-('4 00 kcal 100 g-') energy or 45% protein and 14.65 -16.72 kJ g" (350- 400 Kcal 100 gel) energy could support a higher eggs production and hatchability in red claw broodstock. In this study, at a constant dietary protein level, broodstock performance increased with an increase in dietary energy level. Whereas, feeding red claw crayfish brood stock with lower energy diets resulted in a noticeable reduction in spawning rate and a delay of 2-3 weeks in the time of onset of spawning. The extremely low performance of red claw crayfish broodstock fed with low dietary energy content suggested the important role of energy in its reproduction and metabolism. Crayfish - Australia - Nutrition - Case studies 2004-01 Thesis http://psasir.upm.edu.my/id/eprint/6128/ http://psasir.upm.edu.my/id/eprint/6128/1/FP_2004_13.pdf text en public doctoral Universiti Putra Malaysia Crayfish - Australia - Nutrition - Case studies Faculty Agriculture Saad, Che Roos English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
advisor	Saad, Che Roos
topic	Crayfish - Australia - Nutrition - Case studies
spellingShingle	Crayfish - Australia - Nutrition - Case studies Asgari, Ladan Broodstock Nutrition of Australian Red Claw Crayfish Cherax Quadricarinatus (Von Martens)
description	A series of experiments were conducted to develop least cost feed formulations for red claw crayfish Cherax quadricarinatus broodstock based on the gonad, egg protein and essential amino acids content . All diets were developed using least cost feedstuffs and a linear interactive and discrete optimiser software (LINDO). Prior to evaluation of different formulated diets, the protein and amino acid contents of red claw crayfish broodstock tissues, eggs and newly hatched juvenile under a culture condition were analysed. Increases in ovarian and embryonic proteins content from 10.48 to 65.29 % were observed with the maturation stages of red claw crayfish C. quadricarinatus. These results emphasized the critical role of protein as a main structural component in - maturation. However, amino acid compositions of gonad and embryonic tissue of C. quadricarinatus were generally remained constent with the possible exception of histidine. A comparative study on performance of five dietary protein levels (30-50%) on red claw crayfish was carried out. Based on spawning rate, fecundity, s hatchability and egg size, a range of 40-45% crude protein and 16.72 kJ g-' (400 kcal 100 g-l) energy were the bestloptimal for red claw crayfish broodstock. Eessential amino acids index (EAAI) of all test diets (developed based on available least cost ingredients for red claw crayfish broodstock) were within the best range (0.960-0.996) recommended for crustaceans. Therefore, all test diets were best in terms of protein and essential amino acids sources. In term of biochemical composition, an increase in dietary protein l eve1 was a Iso i ncreased the protein content i n eggs a nd muscle. A positive relationship between dietary protein level and protein contents of eggs and muscle of red claw broodstock was found. A following study later showed that a diet providing 40% protein and 16.72 k~g-('4 00 kcal 100 g-') energy or 45% protein and 14.65 -16.72 kJ g" (350- 400 Kcal 100 gel) energy could support a higher eggs production and hatchability in red claw broodstock. In this study, at a constant dietary protein level, broodstock performance increased with an increase in dietary energy level. Whereas, feeding red claw crayfish brood stock with lower energy diets resulted in a noticeable reduction in spawning rate and a delay of 2-3 weeks in the time of onset of spawning. The extremely low performance of red claw crayfish broodstock fed with low dietary energy content suggested the important role of energy in its reproduction and metabolism.
format	Thesis
qualification_level	Doctorate
author	Asgari, Ladan
author_facet	Asgari, Ladan
author_sort	Asgari, Ladan
title	Broodstock Nutrition of Australian Red Claw Crayfish Cherax Quadricarinatus (Von Martens)
title_short	Broodstock Nutrition of Australian Red Claw Crayfish Cherax Quadricarinatus (Von Martens)
title_full	Broodstock Nutrition of Australian Red Claw Crayfish Cherax Quadricarinatus (Von Martens)
title_fullStr	Broodstock Nutrition of Australian Red Claw Crayfish Cherax Quadricarinatus (Von Martens)
title_full_unstemmed	Broodstock Nutrition of Australian Red Claw Crayfish Cherax Quadricarinatus (Von Martens)
title_sort	broodstock nutrition of australian red claw crayfish cherax quadricarinatus (von martens)
granting_institution	Universiti Putra Malaysia
granting_department	Faculty Agriculture
publishDate	2004
url	http://psasir.upm.edu.my/id/eprint/6128/1/FP_2004_13.pdf
_version_	1783725686883614720

Broodstock Nutrition of Australian Red Claw Crayfish Cherax Quadricarinatus (Von Martens)

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