Social, economic and cultural perspectives of European inland fisheries: review of the EIFAC symposium on fisheries and society     

M. Sipponen  & D. Gréboval 《Fisheries Management and Ecology》2001,8(4-5):283-293

The contributions presented at the EIFAC Symposium on Fisheries and Society in 2000 are reviewed. There have been considerable advances in many sectors of inland fisheries over the past decade. Nowadays the value of inland fisheries to society is generally better understood and increasingly recognized. However, it was recognized that the allocation of fishery resources and their management could still be made more effective through more extensive application of the recent approaches and techniques discussed during the Symposium and reviewed in the paper.  相似文献   

Validation of the accuracy of household reporting of subsistence fishing catch and effort: a Fijian case study   总被引：1，自引：0，他引：1  

C. KUSTER  V. C. VUKI  & L. P. ZANN 《Fisheries Management and Ecology》2006,13(3):177-184

Abstract  The accuracy of household reporting of subsistence fishing catch and effort and seafood consumption on the Fijian island of Ono-i-Lau was studied. A creel survey was carried out concurrently to validate the household survey data. Reported estimates of fishing participation, effort, and fish consumption were not significantly different to the creel survey estimates. Householder's appeared to overestimate the number of fish from the most abundant family Lethrinidae, and underestimate rarer fish. However, there was no significant difference between the reported and observed contribution of the majority of finfish families and invertebrate taxa. The reported and observed catch rate estimates were not significantly different, indicating that Ono-i-Lau villagers are relatively accurate in their estimation of the number and size of fish from recalled catches.  相似文献   

Inland commercial fisheries management in France     

P. Boisneau  & C. Mennesson-Boisneau 《Fisheries Management and Ecology》2001,8(4-5):303-310

The French fisheries management regime is based on public and private ownership of fishing waters associated with a complex multilevel management system. A total of 730 operational commercial inland fisheries were examined by analysis of thematic interviews and questionnaires. Commercial fishermen are beginning to understand the nature of their own activity and its relationship to the concept of sustainable management. Nevertheless, fishermen have to face two major problems: first, they are poorly represented on decision making bodies where anglers are dominant, and secondly their activities are governed by two separate ministries. Opportunities for future development may lie in decision making at the catchment level.  相似文献   

Nutrient digestibility of angling baits for carp, Cyprinus carpio, with implications for groundbait formulation and eutrophication control     

R. ARLINGHAUS  & M. NIESAR 《Fisheries Management and Ecology》2005,12(2):91-97

Abstract  To evaluate the suitability of angling groundbaits as a fish feed and the potential for nutrient loss, the macronutrient digestibility of four groundbaits was investigated in carp, Cyprinus carpio L., using a sieving method of faeces collection and chromic oxide. Apparent digestibility coefficients (ADCs) of protein and lipids were >80% for all angling baits. ADCs of nitrogen-free extracts and phosphorus (P) differed significantly between the test diets, probably because of divergent feed compositions and ingredient treatments. The generally high digestibility estimates indicated that fish feeding on angling groundbait will benefit from this food source. The differences in nutrient digestibility suggested that type of groundbait and ingredient used will have a major effect on potential eutrophication and fish production caused by groundbaiting. The principle of groundbaits to protect the environment should be to minimise the P-content of the groundaits and maximising P-digestibility and P-retention efficiency.  相似文献   

Trends in NE Atlantic landings (southern Portugal): identifying the relative importance of fisheries and environmental variables   总被引：7，自引：1，他引：6  

KARIM ERZINI 《Fisheries Oceanography》2005,14(3):195-209

Time series of commercial landings from the Algarve (southern Portugal) from 1982 to 1999 were analyzed using min/max autocorrelation factor analysis (MAFA) and dynamic factor analysis (DFA). These techniques were used to identify trends and explore the relationships between the response variables (annual landings of 12 species) and explanatory variables [sea surface temperature, rainfall, an upwelling index, Guadiana river (south‐east Portugal) flow, the North Atlantic oscillation, the number of licensed fishing vessels and the number of commercial fishermen]. Landings were more highly correlated with non‐lagged environmental variables and in particular with Guadiana river flow. Both techniques gave coherent results, with the most important trend being a steady decline over time. A DFA model with two explanatory variables (Guadiana river flow and number of fishermen) and three common trends (smoothing functions over time) gave good fits to 10 of the 12 species. Results of other models indicated that river flow is the more important explanatory variable in this model. Changes in the mean flow and discharge regime of the Guadiana river resulting from the construction of the Alqueva dam, completed in 2002, are therefore likely to have a significant and deleterious impact on Algarve fisheries landings.  相似文献   

Relationships between catch and effort in Fijian multispecies reef fisheries subject to different levels of exploitation   总被引：2，自引：0，他引：2  

S. JENNINGS  N.V.C. POLUNIN 《Fisheries Management and Ecology》1995,2(2):89-101

Abstract The catch-per-unit-effort (CPUE) and value-of-catch-per-unit-effort (VPUE) of reef-associated fish species from six Fijian native fishing grounds ( qoliqoli ) subject to different fishing intensities were determined using records of fishing activity from a voluntary logbook scheme. Line and spear fishing techniques were used for more than half the total fishing time (h person^-1 d^-1) in all qoliqoli , and yet the favoured technique in a given qoliqoli was frequently less efficient (lower CPUE) than other techniques. The popularity of relatively ineffective fishing methods implies that fishermen did not always attempt to maximize their catch rates. To compare fishing effort in different qoliqoli , all effort was rescaled on the basis of its recorded efficiency (measured as multispecies CPUE) and expressed as hours equivalent to boat-based spear fishing over coral by day to catch fish for sale. Total fishing intensity in the six qoliqoli ranged from 72 to 4310 h km^-2 reef year^-1. The relationship between catch and effort was linear at all fishing intensities, suggesting that the qoliqoli were all fished on a sustainable basis. Furthermore, whilst there was a significant difference in CPUE and VPUE between the one or two qoliqoli with lowest fishing intensity and all the others, there were no significant differences between these other qoliqoli in terms of the VPUE of the saleable multispecies boat catch or the CPUE of species from piscivorous and carnivorous genera ( Epinephelus, Lethrinus and Plectropomus ) which the fishermen prefer to catch.  相似文献   

水产品进出口贸易对渔业经济增长的影响——基于沿海地区的面板数据实证分析     

邹欢  武戈 《广东农业科学》2010,37(5):127-131

随着沿海地区经济的不断发展,沿海地区渔业和水产品进出口贸易的发展取得了巨大的成就。以我国沿海地区11个省市2003—2007年的水产品进出口贸易额、固定资产投资额、渔业劳动力和渔业经济产值数据为样本,采用出口扩展型生产函数模型,运用面板数据进行实证分析。实证结果表明:沿海地区各省市水产品出口、进口都对渔业经济增长有正向的拉动作用,且拉动作用的趋势相同。  相似文献   

我国渔业政策与渔业管理问题探讨     

刘克岚  黄硕琳 《上海海洋大学学报》2000,(2):169-171

70年代以来 ,我国黄渤海和东海海域的主要鱼业资源 (ｆｉｓｈｅｒｙｒｅｓｏｕｒｃｅｓ)长期处于衰退状况 ,我国政府意识到海洋资源衰退的时间并不算太晚 ,为此制定和实施了一系列的保持渔业资源的文件和管理法规。建国以来 ,与渔业管理相关的法律、法规性规范性文件达 50 0多件[1] 。表 1　渔船总吨位前 5位的国家 (1 995年 )Ｔａｂ .1　Ｄｅｃｋｅｄｆｉｓｈｉｎｇｖｅｓｓｅｌｓ:ｔｏｐｆｉｖｅｃｏｕｎｔｒｉｅｓｂｙｇｒｏｓｓｔｏｎｎａｇｅ(1 995 )国　　家渔船 (百万吨 )中国 5 .5 5俄罗斯 2 .99日本 1.5 1美国 1.40印度 1.0 8　　…  相似文献   

The fallacy of the missing middle: physics →…→ fisheries     

MICHAEL BAUMANN 《Fisheries Oceanography》1998,7(1):63-65

In this paper I discuss some of the shortcomings of today's marine science in response to a recently published paper by Ann Gargett (1997). Three problem areas have been identified in the field linking climate forcing and fish production: First, the yet-to-be established observational proof for a relationship between the two; Second, the strongly neglected biology of organisms at evolutionary and ecological time scales; and thrird, the disregard for spatial and temporal scales in the discussion of mechanisms and supporting data.  相似文献   

问卷调查折射出的辽宁渔业竞争力问题研究   总被引：2，自引：0，他引：2  

包特力根白乙  刘新山  张健 《渔业经济研究》2009,(4):26-31

针对目前辽宁渔业所面临的竞争环境，借助国际竞争理论设计出含有宏观因素、水产部门产业环境及基础设施、渔业生产管理体制和渔业有关人员力量四大系统的竞争力评价模型并进行了广域问卷调查。结果表明，近年来，辽宁渔业竞争力在很多领域有了一定的提高和增强。但是，在政策制度、管理体制和支撑体系等方面还折射出不少问题，制约着整个渔业竞争力的提升。基于此，提出了建立健全渔业保险制度和渔业贷款制度、提升渔业劳动者技术水平、加强养殖业者自律性、进一步制定渔用柴油油价上涨对策等一系列政策建议。  相似文献