Spirulina commonly known as arthrosporic is a small, multicellular, blue, green, spiral, filamentous, photosynthetic alga that naturally grows in alkaline water. Spirulina which means "small spiral". Its high protein content (about 65-70%), this is the added value of biochemical components, essential fatty-acids (for example: 9T-Linolenic-Acid), carotenoids, Phycobilin-proteins, polysaccharide, Vitamins-(except Vit-B12), also it contains: Minerals-and attractive compounds made it a lower for fat, calorie, and free cholesterol origin exporter for-protein (1,2). Spirulina has one of the main features of high protein content can be considerable as a traditional kind of protein (3,4). Algae due to lack of cellulose in the cell walls is easily digested may be due to that greater than 85% of this protein is digestible and absorption after (18 h.) (5). Decreased natural-resources, high price of fishmeal and fluctuations in world market supply have led to suitable-alternatives-(such-as plant-sources) for replacement of fishmeal in the used aqua-culture feed. However, vegetarian diets usually contain highly-levels of-fiber, -starch, insoluble carbohydrates (CHO), and anti-nutrients that affect the growth and digestibility of fish (6, 7); For these-reasons, replacing fish meal with plant proteins is limited. Thus, partial or complete replacements of fish or soybean diets from algae meals in aquaculture systems have gained an increasing-trend in recent years (8). This research aims to study the effect of DXN-spirulina and combination of folic acid +VitB6+ Vit.B12 on reproductive efficiency in female rabbits.
Materials and Methods
In this experimental, rabbits for this study were included: 30 adult female rabbits are randomly divided into three groups as the following:
Gr. I (control): 10 Adult female rabbits orally administered distilled water (5 ml/animal) by gavage daily for 30 days. Gr. II (DXN-spirulina): 10 ADULT female rabbits were orally administered DXN-spirulina (0.5 gm/ kg BW) dissolved in 5ml distilled water by gavage daily for 30 days. Gr. III (folic acid+B6+B12): 10 Adult female rabbits were orally administered of folic acid+B6+B12 (2.5 +50 +1 mg/Kg BW) dissolved in 5 ml distilled water by gavage daily for 30 days. At the end of the treatment period, 2 untreated males (two males/ group) were naturally mated with treated females.
Hormones assay (Enzyme-Linked Immunosorbent Assay "ELISA"):The basic principle of this method according to (9).
Estimation of Follicle Stimulating Hormone concentration (FSH): The FSH enzyme immunoassay principle is acted upon a solid phase enzyme linked immunosorbent test. The estimation of FSH concentration by using an enzyme test kit (Human GmbH.53020 Wiesbaden. Germany gesellschafts for biochemical and diagnostic mbH). (10).
Estimation of Luteinizing Hormone (LH) concentration (ng/ml): The direct antigen ELISA detection by using the high affinity of biotin for streptavidin which has been covered on the surface of microtiter wells. This method done by used a LH enzyme test kit (Human GmbH.53020 Wiesbaden. Germany gesellechalf for biochemical and diagnostic mbH). The procedure is similar to described in the procedure method of FSH- test kit except LH- enzyme conjugate (11).
Estimation of Estradiol (E2) Concentration (pg./ml): The measurement of serum concentration is generally regarded; kit was used (Monobind Inc. lake forest CA 92630, USA) (12). The Estimation of Progesterone Concentration (ng/ml): The measurement of serum progesterone concentration was used Kit (Monobind progesterone ELISA Kit, Inc. Lake Forest CA 92630, USA) (12). Experimental II- Reproductive efficiency: The remainder female rabbits (4 females’ groups) from experiment I (12 female rabbits) were mated with healthy mature male rabbits (6-8 months age), one male rabbit was mated with two female rabbit to evaluate the fertility rate. Statistical Analysis: Expressed the results as mean ± standard deviation (M±SD), the experiments analyzed by using One-way ANOVA by SPSS (Special Program for Statistical System) version 22.0. The least significant difference test (LSD) was used to determine the differences between groups in ANOVA-test, the level significant set on (p< 0.05) (13).
Result:
Effect of DXN-spr. and comb. of (FA +B12 +B6) on the reproductive hormone in mature female rabbits: The effect of DXN-spr. and combination of (F. A+B6+B12) on female reproductive hormone represented in table (1). The estrogen concentrations appeared no significant difference between all groups, while the progesterone concentration showed significant (P<0.05) decreased in combination Gr. (GIII) as compared to the control group and DXN-spr. group when showed no significant differences between it. Also, the testosterone hormones appeared no significant differences in all groups. Also, the data about the FSH and LH concentration results showed reported in table (1), that appears significant (P<0.05) decreased in group GIII more than the other two groups, as showed no significant differences between Gr. I (control) and group that administration DXN- spr. (GII).
Effect of DXN-spr. and combination of (FA. +B6+B12) on reproductive efficiency in mature female rabbits of experimental: The data of reproductive efficiency after mating of adult female rabbits with adult healthy males, fertility rate and number of fertility female increased in Gr. II (DXN-Spr.) compared with other groups. Also showed increased significantly (P<0.05) in the weight of newborn and % of fertility in this group compared to control and combination groups (Table 2).
the spr. elevation the iron content in blood of pregnancy rats during the first 10 days from pregnancy (26) and also other observation by other researchers who that reported the blood volume and red cell volume of material which increment significantly at the end of pregnancy period to meet the elevation iron demand of fetus development (27). Spr. have good hematopoietic nutrients were adequate to meet the higher demands of lactation and pregnancy in group of spr. due to its content of essential component (26). In the present study, the results showed positively effect of supplementation spr. on reproductive efficiency by increased number of pregnancy female rabbits and number of fetus and fertility% (table 2), these agreement with that reported by (28), the reproductive performance parameters increased but not significantly but increased in total and live litter size and also weight of birth treated with spr. Also (29) whom reported that fertility of rabbits significantly affected in treated with spr. and also with lycopene addition but enhance in litter weight and size of birth fed algae compared to group of control. Fertility efficiency: After 30 days of treatment, the mating of remaining mature female rabbits with healthy male rabbits for study the reproductive efficiency. The results appeared significant improvement in number and percentage of female fertility and also in number of new born and increment weight of new born in group of DXN-spr. these results occurred may be due to enhance in hormonal reproductive concentration in table (1). The DXN-spr. positively efficiency on reproductive by increased fertility of female and number of fetuses after administration of spr. these results agreement with result reported by James et al. (30) Which feeding different levels of spr. to fish and showed increased in fertility and growth performance and also who reported that these parameters positively increased when increased the level of spr.
conflict of Interest
The author(s) declared that there is no conflict of interest.
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