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首页> 外文期刊>Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Animal Science and Biotechnologies >Qualitative and Quantitative Structure of Alosa Populations at the Romanian Black Sea Coast
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Qualitative and Quantitative Structure of Alosa Populations at the Romanian Black Sea Coast

机译：罗马尼亚黑海沿岸Alosa种群的定性和定量结构

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The most important resource traditionally exploited for commercial purposes is the fisheryresource. Marine biological resources are essential for the survival ofhumanity, but, as it is well known, although they are renewable, they are notinfinite and therefore must be managed properly. Fishery resources are affectedboth by the changes occurring in natural environmental conditions and bychanges in environmental conditions as a result of human activities.In the past few years, the anthropogenic causes that led to severe changesin fish populations from the Romanian coast partly persisted, but some haveoccurred with less intensity, as follows:- the environmental conditions in the coastal area are still quite poor,reflected by fishing clusters traveling offshore during the warm season;- the influence of hydrotechnical structures on the Danube on sturgeonbreeding and shad, in general, and Pontic shad, in particular, is maintained; - the use of inappropriate fishing gear and techniques;- illegal fishing of breeding clusters.In the Romanian marine sector, the species structure of catches partlyreflects the fish fauna composition, as the ratio of fished species isconditioned primarily by two factors: the type of fishing gear and the seasonalconditions of forming and maintaining fishing clusters.Fishery research conducted in 2011-2012 mainly aimed at reaching thecorrect knowledge and estimation of the dynamics of the Black Sea potential, inorder to ensure the necessary data volume for stock management and exploitationunder sustainable conditions. This research focused on collecting data andinformation on environmental conditions that directly affect fisheries,seasonal distribution of exploitable clusters, the qualitative and quantitativecomposition of catches, the biology of the main Alosa species caught in the Romanian marine area.The research works performed are meant to lead to the knowledge of thecurrent state of Alosa populationsand were conducted along the entire Romanian Black Sea coast, in almost allfishing points, by organizing both expeditions along the coast (gillnetfishing) and sea surveys (pelagic trawl fishing).The paper refers to the qualitative and quantitative composition ofcatches, as well as the length and weight class structure, age, sex ratio,degree of maturation, length/weight relationship for the Alosa species which populate the Romanian coast, underhydroclimatic conditions specific or the analyzed period.
机译：传统上用于商业目的的最重要资源是渔业资源。海洋生物资源对于人类的生存至关重要，但是，众所周知，尽管它们是可再生的，但它们并不是无限的，因此必须进行适当的管理。渔业资源受到自然环境条件变化和人类活动导致环境条件变化的影响。在过去几年中，导致罗马尼亚沿海鱼类种群发生严重变化的人为原因在某种程度上持续存在，但有些已经发生强度降低的原因如下：-沿海地区的环境条件仍然很差，在温暖的季节被在岸上捕鱼的鱼群所反射;-水力结构对多瑙河对st鱼繁殖和sha鱼以及一般而言庞蒂奇的影响尤其是保持阴影; -使用不适当的捕鱼工具和技术;-非法捕捞繁殖群。在罗马尼亚海洋部门，渔获物的物种结构部分反映了鱼类的动物组成，因为捕鱼种类的比例主要取决于两个因素：捕捞的类型在2011-2012年进行的渔业研究的主要目的是获得对黑海潜力动态的正确认识和估计，以确保在可持续条件下进行种群管理和开发所需的数据量。这项研究的重点是收集直接影响渔业的环境条件的数据和信息，可利用集群的季节性分布，渔获物的定性和定量组成，罗马尼亚海域捕获的主要Alosa物种的生物学信息。据了解Alosa种群的现状，并通过组织沿海探险（刺网捕鱼）和海上调查（远洋拖网捕鱼），在罗马尼亚黑海沿岸的几乎所有捕鱼点进行了调查。数量的组成，以及长度和体重的类别结构，年龄，性别比，成熟度，在罗马尼亚海岸分布的Alosa种类的长度/重量关系，特定的或特定的气候条件下的干旱气候条件。

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