黄渤海区张网渔业

来源 :渔业科学进展 | 被引量 : 0次 | 上传用户:jiangjuexin
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
2010年6~7月,利用抽样调查方法对黄渤海区32个主要渔港、渔村的张网渔业进行了实地调查和现场测量。依据调查资料并结合2009年度河北、辽宁、山东以及天津三省一市的渔具渔法调查报告、1983~2009年中国渔业年鉴中记载的张网捕捞产量分类统计资料,对黄渤海区的张网渔业进行了研究。结果表明,1998年张网产量最高,达90.43万t,贡献率为17.18%,此后逐年波动下降。当前,张网是黄渤海区捕捞作业的重要渔具渔法之一,处在第3位,年产量为38.15万t,贡献率为10.49%。目前在黄渤海区进行捕捞作业的张网共有4个型、7个式、19种张网网型、总量69万顶。辽宁省的张网数量占三省一市张网数量的53.54%,主要分布在辽东湾作业;河北省的张网数量占24.69%,主要分布在渤海湾作业;山东省的张网数量占23.08%,主要分布在日照至烟台近海作业。其中以捕捞海蜇、虾类和小杂鱼为主的并列单片张网占54.51%;以捕捞毛虾为主的双锚竖杆张网占16.12%。大多数张网的最小网目尺寸均在4~30mm之间。综合分析表明,张网在黄渤海区渔业中所占比重较大、选择性较差、最小网目尺寸偏小,不利于黄渤海区渔业资源可持续利用。 From June to July 2010, a sample survey was conducted to survey and measure the net fisheries of 32 major fishing ports and fishing villages in the Huang-Bohai Sea area. Based on the survey data and the 2009 survey report of fishing tackle fishing methods in Hebei, Liaoning, Shandong and Tianjin provinces and municipalities and the classification statistics of net fishing yield recorded in China Fisheries Almanac from 1983 to 2009, Were studied. The results show that in 1998 the highest net output reached 904,300 t, the contribution rate was 17.18%, and then decreased year by year. Currently, Zhangwang is one of the major fisheries fishing methods in the fishing operation in the Yellow Sea and Bohai Sea, ranking No. 3 with an annual output of 381,500 tons and a contribution rate of 10.49%. There are currently four types of fishing nets in the Yellow Sea and the Bohai Sea area, seven types and 19 types of netting, with a total volume of 690,000. Liaoning Province accounted for 53.54% of the total number of Zhangwangs in three provinces and one city, mainly distributed in Liaodong Bay; the number of Zhangwangs in Hebei Province accounted for 24.69%, mainly distributed in Bohai Bay; the number of Zhangwangs in Shandong Province accounted for 23.08% , Mainly distributed in Rizhao to Yantai offshore operations. Among them, 54.51% were monolithic jellyfish dominated by jellyfish, shrimp and small trash fish, and 16.12% were double-anchored vertical pole net with fishing shrimp. Most webs have a minimum mesh size between 4 and 30mm. Comprehensive analysis shows that Zhangwang has a large proportion of fishery in the Yellow Sea and Bohai Sea, a poor selectivity and a small minimum size of the meshes, which is unfavorable to the sustainable utilization of fishery resources in the Yellow Sea and the Bohai Sea.
其他文献
乳腺纤维腺脂肪瘤又称乳腺错构瘤[1],很少见.本科采用钼靶X线与CT相结合诊断乳腺纤维腺脂肪瘤3例,现回顾性地予以总结,旨在提高对本病的认识,并探讨钼靶X线与CT相结合在诊断
从蒲公英被风吹起的那一刻,就代表着它又开始了旅行的一生。风娃娃笑嘻嘻地跑来,带走了一颗蒲公英的小种子。小种子并不害怕。它听着小溪的歌唱,好奇地探望着。它看见了一位
教学方法是教师为完成教学任务所采用的手段,教学改革在很大程度上就是教学方法的改革,直接关系到能否达到预期的教学效果。为了让学生能更积极地参与教学过程,通过有限的课
患者男,54岁,5月前无诱因出现咳嗽,伴少量白色泡沫痰,无咯血、胸痛、发热,自服抗炎药物治疗效果差.症状渐加重,当地医院检查发现右上肺占位.为进一步诊治住入本院.
“爸爸是船,妈妈是帆,载着小小的我,驶向金色的彼岸……”我的耳畔又响起了这首美丽的童谣。我爸爸平时工作很忙,经常不在家,但他非常关心我的学习。在我眼里,爸爸是一位慈父
对伴有某些危险因素的258例高血压病人,采用随机对照研究法,分成药物阶梯治疗组和耳穴按摩治疗组进行治疗性观察研究,治疗12周,药疗纽与耳穴组总有效率分别为61%及54%,排除不依
经皮经肝穿刺胆汁引流术(PTBD)是恶性梗阻性黄疸常见姑息性治疗方法[1].本院自1997-08-2007-08对78例有完整资料的恶性梗阻性黄疸患者行PTBD术,术后治疗效果满意,现总结如下.
在从事英语教学的十几年里,当我每次揣着精心备好的教案走进课堂时,心里总是充满信心和期待,因为我相信,自己的备课很认真、很仔细而且有所创新,我的英语课堂一定会达到令人
7th Nov, 2011 Sunny Monday "Ring(铃响)..." the clock is ringing. It's time to get up.
为进一步提高农村经济发展效率,同时也促使农民能够提升文化水平,构建有效的农家书屋是非常必要的,作为相关工作人员,应该重视互联网时代发展机遇,积极把“互联网+”模式引入