碩士 / 國立海洋大學 / 水產養殖學系 / 90 / X-organ sinus gland complex, one of the neurosecretory system of crustaceans, secrets GIH (Gonad-inhibiting hormone) to regulate ovary maturation. Unilateral eyestalk ablation has been used to induce an accelerated ovarian maturation and spawning in bloodstocks. The effects of artificial diets supplemented with steroid hormone on the ovarian maturation and spawning in wild and pond shrimps Penaeus monodon, and the ovarian maturation of pond shrimps Litopenaeus vannamei were investigated in this study.
Wild eyestalk ablated, shrimps P. monodon were fed with oysters and clams, and eyestalk ablated pond shrimps P. monodon were fed four diets with steroid hormones, [17α-hydroxyprogesterone], [progesterone], [17β-estradiol] and [17α-hydroxyprogesterone, progesterone, 17β-estradiol and testosterone] in experiment 1. Adult shrimps treated with fresh food and diets with four steroid hormones had significantly higher spawning , hatching rate and spawning quantity than fed with the other diets. Wild adult shrimps fed with fresh food had a higher spawning rate and number of egg spent than pond adult shrimps. Pond adult shrimps fed with compound steroid hormone diet had a higher hatching rate than the other treatments.
Pond adult P. monodon were divided into five groups of body weight (60g-80g, 80g-100g, 100g-120g, 120g-140g, and 140g-160g) and fed with compound steroid hormone diet in experiment 2. Over 120g of the body weight had significantly higher spawning rate, spawning quantity and hatching rate than the other treatments. Females shrimps over 80g of the body weight had near 200% maturation rate and over 95% hatching rate. 80g of the body weight is the lowest treatment size with the compound steroid hormone diet in this experiment.
Female adult pond L. vannamei with a mean body weight of 25g were fed with compound steroid hormone diet and control diet (conducted no steroid hormone) in experiment 3. All the eyestalk ablated shrimps could reach ovarian maturation. However adult pond L. vannamei were fed with compound steroid hormone diet had a fast and a higher ovarian maturation rate. All females without eyestalk ablation had not found ovarian maturation, with compound steroid hormone diet or control diet treatment.
| Identifer | oai:union.ndltd.org:TW/090NTOU0086014 |
| Date | January 2002 |
| Creators | 洪明欣 |
| Contributors | 冉繁華 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 48 |
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