魚群數量 的英文怎麼說
中文拼音 [yúqúnshǔliáng]
魚群數量
英文
number of school-
Meanwhile, the study also shows that the diversity of studied cave animals is inversely proportional to human population density and water quality ; and bio - diversity, to some extent, is proportional to soil fertility and amount of chemical fertilizer, but inversely when excessive ; the correlativity between bio - diversity and vegetation cover rate is not obvious, when ground vegetation is strongly interfered by human being ; the amount of diestrammena marmorata is proportional to the d iversity of plant, and inversely proportional to soil fertility, and in a way, to water quality ; and the correlativity between community and water quality and soil fertility, and between water quality and the amount of mosquito and fly, is not as good as expected. the author points out that diestrammena marmorata, bat, mosquito, fly, oreolalaxrhohostig metus ( or cudata ), and fish can be chosen as in
同時，研究還表明：調查洞穴的物種多樣性與人口密度、水質成負相關；在一定范圍內，物種多樣性與化肥施用量、土壤肥力成正相關，超過一定的值則成負相關;在人類對地表植被的高強度作用下，物種多樣性與植被覆蓋率的相關性不明顯;蚊蠅數量與土壤肥力基本上呈正相關;斑灶馬數量與植物種數呈正相關，斑灶馬數量與在一定水質范圍內與水質呈負相關，與土壤肥力呈負相關;群落數與水質和土壤肥力、蚊蠅數量與水質都不能表現較好的相關性;研究認為，可以選擇斑灶馬、蝙蝠、蚊蠅、紅點囊蟾（或有尾類） 、魚類等作為指示動物對洞穴環境進行監測。The order euphausiacea consists of 86 or 87 species distributed over the ocean of the world, plays an important role in marine ecosystem, particularly in southern ocean, and is the key link of marine primarily productivity and higher trophic levels. krill fisheries are relatively recent developments. 47 species belonging to seven genera of two families in krill were recorded in china seas
磷蝦是一類大型的海洋浮遊動物，數量大，分佈廣，是海洋浮遊動物的重要類群之一，在海洋生態系統中具有重要地位，尤其在南大洋，是維系海洋初級生產者與更高營養階的主要環節之一；同時，磷蝦又是許多經濟魚類的主要餌料，近年來，磷蝦作為新興的漁業資源正引起人們的高度重視。Until the new study, scientists had estimated the number of venomous fish species largely from medical records of fish - human encounters, not on biological or evolutionary species surveys
在此項研究之前，科學家們很大程度上是從受到有毒魚類攻擊的人群的醫學記錄來估計有毒魚類的數量，而不是通過生物學和遺傳學的調查This a nimal could not be found in the branches flowing into dongting lake now
長江江豚在洞庭湖的分佈范圍主要集中在從城陵磯到鯰魚口一帶，其種群數量大致為100 150頭。That is whygovernments try to limit the amount of fish taken out of the sea
正因為如此，各國政府盡可能地限制從海洋捕撈魚群的數量。In alaska, salmon populations are faltering as melting permafrost pours mud into rivers, burying the gravel the fish need for spawning
在阿拉斯加， ?魚群的數量正在逐漸減少，因為永久凍土層融化帶入大量的泥土到河中，覆蓋了?魚產卵所需的碎石。Multivariate morphometrics was conducted on the endemic asian genus sinibrama wu, 1939 in east asia in order to investigate the morphological variations among the 4 nominal species and subspecies known from south china. principal component analysis ( pca ) was performed respectively for seven meristic and thirty - two morphometric characters that were based on 224 specimens
運用多變量形態度量學方法，研究東亞特有魚類類群?華鯿屬魚類的形態差異，對其在分類學上存在疑問的物種的不同地理居群的18個框架測量距離、 14個常規測量距離和7個可數性狀進行了主成分分析。Macrophyte played important role in the distribution of fish community. biomass of fishes in the macrophyte regions was significantly higher than in the regions without macrophyte
水生植被是小型魚類群落分佈的主要影響因子，有水草的區域魚類數量顯著比無水草的區域多。Theresearchers also examined whether the recovery was sufficient to makethe protected areas more resilient to storms and changes intemperature, but the results were not statistically significant
研究人員也檢驗了魚群數量的恢復是否足以令保護區更有效地抵禦暴風雨的侵襲和溫度變化帶來的影響，但檢驗結果未達到統計上的顯著水平。In january, worldwide regulators meeting in japan adopted a plan aimed at slowing the decline in global tuna stocks by reining in illegal fishing, controlling the growth of fleets and sharing data on stock assessments
各國管理單位在一月于日本舉行的會議中，為減緩全球黑鮪魚數量下滑而訂定了計畫，即控制非法捕魚、控管魚群生長及分享魚群數量的估計資料。Marine reserves, where no - fishing is allowed, have been shown to allow fish populations to recover from overfishing in many countries, but those on coral communities in tung ping chau have shown no change in diversity, abundance or biomass since the park was established
不少國家在設立禁止捕魚的海岸保護區后，都能令以往因過度捕魚而下跌的魚類種群數目回升。但是自海岸公園成立以來，東坪洲的珊瑚群落扶養的魚類種群不論在多樣性數量或生物量方面均無改變。分享友人