Effect of dietary soybean lecithin on reproductive performance of Chinese mitten crab Eriocheir sinensis (H. Milne-Edwards) Broodstock

Abstract

The effect of increasing levels of dietary phospholipids (PL) on the ovarian development and reproductive performance of Chinese mitten crab Eriocheir sinensis were investigated using four semipurified formulated diets supplemented with 0%, 1.2%, 2.4%, and 3.6% PL. Four groups of 40 females, with an average individual body weight of 95-120 g, were fed the experimental diets for a period of 7 months. Male crabs were introduced into the female rearing system in March, and mating, spawning, and egg hatching occurred in the following month. After 10 weeks of feeding, females fed the diet with 2.4% PL had a significantly higher gonadosomatic index (GSI) than females fed the diet with 0% PL, whereas females fed the diet with 1.2% PL had a significantly higher hepatic moisture content and lower hepatic lipid content than the other groups (P \ 0.05). After mating, the spawning rate was higher among females fed diets with 3.6% and 2.4% PL (95% and 92%, respectively) compared with females fed diets with 0% and 1.2% PL (both 81%). The results showed that egg production (total number of eggs/female) and fecundity increased with increasing dietary PL level, with females fed diets with 0% and 1.2% PL supplementation having significantly lower values than females fed the diet with 3.6% PL (P \ 0.05). In conclusion, our results suggest that dietary PL supplementation has a positive effect on ovarian development and reproductive performance of E. sinensis broodstock. Further study should aim to investigate the optimal PL level in the broodstock diet of E. sinensis in respect to offspring quality.

Effect of dietary HUFA on tissue fatty acid composition and reproductive performance of Chinese mitten crab Eriocheir sinensis (H. Milne-Edwards) broodstock

“…The results of the present study showed that there were significant decrease in the HSI, hepatopancreatic lipid content with concomitant increase in the GSI, ovarian lipid and dry matter content in the process of ovarian development. This is in line with the observations by Cheng et al (1998aCheng et al ( , b, 1999, Wen et al (2001) and Sui et al (2009), reconfirming that the hepatopancreatic lipid reserves are transferred to the developing ovaries during the ovarian maturation of the female E. sinensis. Therefore, it is not surprising that in this study, the dietary HUFA level significantly affected the fatty acid composition (particularly total HUFA content) of the hepatopancreas, ovary, and eggs for all treatments.…”

Effects of dietary soybean lecithin on gonadal development and vitellogenin mRNA expression in the female redclaw crayfishCherax quadricarinatus(von Martens) at first maturation

“…Similar results have been observed for other decapods, including L. vannamei (Palacios, Ibarra & Racotta ), Macrobrachium rosenbergii (Cavalli, Tamtin, Lavens & Sorgeloos ) and E. sinensis (Sui et al . ). The decreased trend of HSI with increasing amounts of GSI confirmed this notion in the present study.…”

“…Similar results of higher dietary SL resulting in higher GSI have also been observed in Marsupenaeus japonicus (Alava, Kanazawa, Teshima & Sakamoto ) and E. sinensis (Sui et al . ). These results suggest that a diet containing 6.5% fish oil, with no supplemental lecithin, may be sufficient for the growth and survival of C. quadricarinatus adults, and increased amounts of dietary SL may be used to improve ovarian development.…”

“…The positive effect of dietary soybean lecithin (SL) on ovarian development and reproductive performance has been reported in several crustacean broodstocks, including Penaeus monodon (Millamena, Primavera, Pudadera & Caballero ), Litopenaeus vannamei (Cahu, Guillaume, Stephan & Chim ) and Eriocheir sinensis (Wu, Cheng, Sui, Zeng, Southgate & Yang ; Sui et al . ). Although a previous study has been conducted on the SL requirements of juvenile redclaw crayfish (Thompson, Muzinic, Christian, Webster, Manomaitia & Rouse ), no information exists on the role of dietary SL in broodstock maturation to date.…”

Breeding and fecundity of the sub-Antarctic crab Halicarcinus planatus (Crustacea: Hymenosomatidae) in the Deseado River estuary, Argentina

“…Diez & Lovrich (2009) hypothesize that the difference recorded in the fecundity is because the primiparous females produced fewer eggs as a result of their smaller size during the adolescent stage. Another factor to consider is the nutritional status, which is strongly related to the production of eggs (Wen et al, 2002;Djunaidah et al, 2003;Sui et al, 2008). Also, a positive relationship was found between the fecundity and CW of mature females.…”