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| 光照周期对曼氏无针乌贼(Sepiella japonica)繁殖、性类固醇激素系统及生长性能的调控作用 |
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平洪领1, 王天明1, 刘立芹1, 史会来2, 胡逍宇1, 吕振明1, 杨静文1, 迟长凤1, 刘慧慧1, 黄伟1, 顾忠旗3, 吴常文1
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1.浙江海洋学院 国家海洋设施养殖工程技术研究中心 舟山 316004;2.浙江省海洋水产研究所 舟山 316004;3.浙江省嵊泗县海洋科技研究所 舟山 202450
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| 摘要: |
| 养殖条件下的性早熟、个体小型化是影响曼氏无针乌贼(Sepiella japonica)的养殖效益的重要因素。为探讨养殖条件下曼氏无针乌贼性早熟的可能因素, 本文探讨了3 种不同光照周期(23D: 1L;12D: 12L; 1D: 23L)对其繁殖性能及个体生长的影响。结果表明: 光照周期对曼氏无针乌贼的繁殖性能总体影响不大, 除长光照周期(1D:23L)下, 睾酮(T)、雌二醇(E2)等激素水平有较显著的降低外(P<0.05), 光照对乌贼繁殖时间、性腺重及性腺发育指数等指标均无明显影响。但光照周期对曼氏无针乌贼生长却有明显影响, 在胴长、体重、瞬时生长率(IGR)及肥满度等生长指标上均呈现出短光照组>中光照组>长光照的趋势。短光照组雌乌贼在体重、瞬时生长率和肥满度, 雄乌贼在胴长等指标上, 均显著优于长光照组(P<0.05)。该结果表明光照周期可作为影响曼氏无针乌贼生长性能的重要因素, 在今后的养殖条件优化中应加以考虑。 |
| 关键词: 曼氏无针乌贼 光周期 生长 繁殖 |
| DOI：10.11693/hyhz20141200356 |
| 分类号: |
| 基金项目:浙江省自然科学基金项目, LY13C190001 号; 国家支撑计划课题, 2011BAD13B08 号; 浙江省科研院所专项, 2015F50055 号;国家自然科学基金项目, 31101937 号; 浙江省海洋与渔业局项目, 浙海渔计(2012)83 号。 |
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| EFFECT OF PHOTOPERIOD ON REPRODUCTON, SEX STEROID HORMONE SYSTEM AND GROWTH PERFORMANCE OF CUTTLEFISH SEPIELLA JAPONICA |
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PING Hong-Ling1, WANG Tian-Ming1, LIU Li-Qin1, SHI Hui-Lai2, HU Xiao-Yu1, LÜ Zhen-Ming1, YANG Jing-Wen1, CHI Chang-Feng1, LIU Hui-Hui1, HUANG Wei1, GU Zhong-Qi3, WU Chang-Wen1
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1.Zhejiang Ocean University, National Engineering Research Center for Marine Aquaculture, Zhoushan 316004, China;2.Marine Fisheries Research Institute of Zhejiang, Zhoushan 316004, China;3.Institute of Marine Sciences and Technology of Shengsi, Zhoushan 202450, China
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| Abstract: |
| Prematuration and miniaturization in cultured cuttlefish Sepiella japonica have largely affected the farming industries in China. To cope with the problem, we examined the effect of photoperiod on the reproductive and growth performance of S. japonica for the first time. Three photoperiods (23D:1L; 12D:12L; 1D:23L) were set. Results show that photoperiod had generally no obvious effect on the sexual maturation of S. japonica, or on the reproductive performance parameters, such as spawning time, gonad size, and gonad somatic index (GSI) of both sex. However, significant decrease in testis testosterone (T) and ovary estradiol (E2) contents were found in S. japonica in the long light group (23D:1L), and the growth performance was affected significantly by photoperiod. The body length, body weight, instantaneous growth rate (IGR) and relative fatness of both sex in shorter light group (23D:1L) were generally greater than that in medium light group (12D:12L) and even more much greater than that in the long light group (1D:23L). However, significant advantage was only found in body weight, IGR, and relative fatness of female, and body length of male in the short light group (23D:1L) compared to that of the long light group (P<0.05). Therefore, photoperiod affected the growth performance of S. japonica in aquaculture and should be adjusted for optimization. |
| Key words: Sepiella japonica photoperiod reproductive performances growth |