Investigation of movement and factors influencing post-release survival of line-caught coral reef fish using recreational tag-recapture data

Six species of line-caught coral reef fish (Plectropomus spp., Lethrinus miniatus, Lethrinus laticaudis, Lutjanus sebae, Lutjanus malabaricus and Lutjanus erythropterus) were tagged by members of the Australian National Sportsfishing Association (ANSA) in Queensland between 1986 and 2003. Of the 14,757 fish tagged, 1607 were recaptured and we analysed these data to describe movement and determine factors likely to impact release survival. All species were classified as residents since over 80% of recaptures for each species occurred within 1 km of the release site. Few individuals (range 0.8–5%) were recaptured more than 20 km from their release point. L. sebae had a higher recapture rate (19.9%) than the other species studied (range 2.1–11.7%). Venting swimbladder gases, regardless of whether or not fish appeared to be suffering from barotrauma, significantly enhanced (P < 0.05) the survival of L. sebae and L. malabaricus but had no significant effect (P > 0.05) on L. erythropterus. The condition of fish on release, subjectively assessed by anglers, was only a significant effect on recapture rate for L. sebae where fish in “fair” condition had less than half the recapture rate of those assessed as in “excellent” or “good” condition. The recapture rate of L. sebae and L. laticaudis was significantly (P < 0.05) affected by depth with recapture rate declining in depths exceeding 30 m. Overall, the results showed that depth of capture, release condition and treatment for barotrauma influenced recapture rate for some species but these effects were not consistent across all species studied. Recommendations were made to the ANSA tagging clubs to record additional information such as injury, hooking location and hook type to enable a more comprehensive future assessment of the factors influencing release survival.     

肉免专门化新品系的利用与推广

肉兔专门化新品系（ 以下简称Ａ 系兔）是经四川省畜牧科学研究院连续九年、六个世代的选育，供作母系亲本利用的中型肉兔专门化品系。多年来在农村饲养条件下推广利用结果表明：Ａ 系兔在农村养兔户的平均胎产仔数８－１ ±１－２ 只，年平均产仔７－１ ±０－８４ 胎，年产仔数达５７－５ 只的高水平。与引进的齐卡兔配套生产的商品兔，农村条件下产仔数达８－４３ ±１－９６ 只，９０ 日龄重达２－４５ ±０－３８ｋｇ，明显高于省内“七·五”期间比利时兔×本地兔或加利福尼亚兔×本地兔，以及“八·五”期间齐卡兔改良本地兔的生产效果。Ａ 系兔现已在全国１８ 个省及四川省内１２０ 余个县推广利用。     

单片机在线控制系统

本文阐述了单片机在线控制系统的一般模式及设计方法，并给出一种实用的单片机温度控制系统 。     

边、内行小麦的灌浆特性以及与产量的关系

本试验对适期播种的小麦和晚茬麦的边、内行灌浆特性的研究表明：边行小麦的千粒重、灌浆速率明显高于内行，随时间的推移，差距逐渐加大，到灌浆中期达最大值，灌浆后期又缩小；测产结果，边行比内行产量显著增加。     

影响西瓜F1代种子数量的遗传因素

用种子数量不同、千粒重不同的亲本进行杂交组配，通过对双亲及F1代种子数量的调查，发现F1代种子数量的多少与双亲种子数量关系不大，而与双亲种子千粒重差别的大小关系密切，双亲种子千粒重差别越大，F1代种子数量越少。从而指出选育少籽F1代的方法。     

实施大西线调水解决有关国际问题的思考

为了解决大西线南水北调有关国际问题，查阅了有关法规和文献，介绍了雅鲁藏布江、怒江和澜沧江下游流径的国家，国际河流水资源分配的基本方法与模式。认为实施大西线南水北调不存在国际惯例的障碍，并建议中国政府应做好国际河流水资源分配和前期准备工作与研究。     

濮临输油管道一泵到底输油工艺分析

濮临输油管道随着中原油田原油产量的不断下降,其输油量也逐年降低。为解决输油量与输油泵不匹配问题,通常采用阀门节流方法,但节流会造成能源损失,为减少节流造成的能源损失,提高企业经济效益,濮临线提出了一泵到底的输油工艺,并于1995年4月进行了运行。给出了能源损失和经济损失的计算公式。通过对两站单泵运行和一泵到底运行时的能源损失值和经济损失值的对比分析,可知一泵到底输油工艺不仅减少了(火用)损失,而且还节约了经济费用。     

我国玉米骨干自交系形态性状的鉴定与评价

通过对我国玉米54份骨干自交系的植株性状、产量性状及生育期性状的分析评价,筛选出了各单个性状表现优良与较差的自交系,分析了四大杂优类群间在形态性状方面的差异,为我国玉米种质的改良与创新提供了依据。     

线椒新品种黔椒5号的选育

黔椒5号是以H29—2为母本、H32—1为父本配制的干鲜两用型辣椒新品种,于2010年5月通过贵州省农作物审定委员会审定。该品种单果鲜质量19130g,果长16．14cm,果宽2．06cm,属线形果,且果面光滑、果形均匀,商品性较好。鲜椒干物质含量23．1％,VC180mg／100g,辣椒碱0．048％,二氢辣椒碱0．0022％,味辣,品质佳;田间抗逆性强,结果性好,早熟,高产;适合贵州辣椒栽培区及省外气候奈件相似的地区栽培。     

温度对籼型温敏核不育系2301S育性的影响

1999年和 2 0 0 0年分期播栽试验 ,研究了温度对籼型温敏核不育系 2 30 1S自交不育度和花粉败育类型的影响。结果表明 :2 30 1S的育性转换低温敏感期在花粉母细胞形成期至减数分裂期 ,约在抽穗前 17～ 11d ;生长早期的持续高温对其育性表达有一定的补偿作用 ;导致 2 30 1S自交不育的育性转换和无花粉败育类型转换的起点温度分别是 2 3℃和 2 7℃。