南方水产科学
南方水產科學
남방수산과학
South China Fisheries Science
2015年
5期
76-81
,共6页
许友伟%陈作志%范江涛%张俊
許友偉%陳作誌%範江濤%張俊
허우위%진작지%범강도%장준
南沙西南陆架%种类组成%多样性指数%底拖网渔获物
南沙西南陸架%種類組成%多樣性指數%底拖網漁穫物
남사서남륙가%충류조성%다양성지수%저타망어획물
southwestern continent shelf of Nansha area%species composition%biodiversity index%catch of bottom trawl
根据2013年对南沙西南陆架海域的4个航次底拖网调查数据,分析了渔获组成及生物多样性指数。结果显示,4个航次调查期间共收集并记录渔获物251种,其中鱼类202种、头足类16种、甲壳类33种,渔获种类夏季最多,冬季最少。根据计算相对重要性指数( IRI ),短尾大眼鲷( Priacanthus macracanthus )、剑尖枪乌贼(Uroteuthis edulis)和多齿蛇鲻(Saurida tumbil)为优势种(IRI≥500);深水金线鱼(Nemipterus bathybius)、蛇鲭(Gemphylus serpens)、黑(Lophiomus setigerus)、大头狗母鱼(Trachinocephalus myops)、带鱼(Trichiurus leptu-rus)、花斑蛇鲻(Saurida undosquamis)和长体圆#(Decapterus macrosoma)等为主要种(100≤IRI<500)。聚类分析表明春秋季的优势物种结构相似性较高。丰富度指数( D)在夏季达到最高,冬季最低;多样性指数( H′)夏季最高,最小值出现在秋季;均匀度指数(J′)秋季最低,其他3个季节变化不大;优势度指数(λ)秋季最高,夏季最低。
根據2013年對南沙西南陸架海域的4箇航次底拖網調查數據,分析瞭漁穫組成及生物多樣性指數。結果顯示,4箇航次調查期間共收集併記錄漁穫物251種,其中魚類202種、頭足類16種、甲殼類33種,漁穫種類夏季最多,鼕季最少。根據計算相對重要性指數( IRI ),短尾大眼鯛( Priacanthus macracanthus )、劍尖鎗烏賊(Uroteuthis edulis)和多齒蛇鯔(Saurida tumbil)為優勢種(IRI≥500);深水金線魚(Nemipterus bathybius)、蛇鯖(Gemphylus serpens)、黑(Lophiomus setigerus)、大頭狗母魚(Trachinocephalus myops)、帶魚(Trichiurus leptu-rus)、花斑蛇鯔(Saurida undosquamis)和長體圓#(Decapterus macrosoma)等為主要種(100≤IRI<500)。聚類分析錶明春鞦季的優勢物種結構相似性較高。豐富度指數( D)在夏季達到最高,鼕季最低;多樣性指數( H′)夏季最高,最小值齣現在鞦季;均勻度指數(J′)鞦季最低,其他3箇季節變化不大;優勢度指數(λ)鞦季最高,夏季最低。
근거2013년대남사서남륙가해역적4개항차저타망조사수거,분석료어획조성급생물다양성지수。결과현시,4개항차조사기간공수집병기록어획물251충,기중어류202충、두족류16충、갑각류33충,어획충류하계최다,동계최소。근거계산상대중요성지수( IRI ),단미대안조( Priacanthus macracanthus )、검첨창오적(Uroteuthis edulis)화다치사치(Saurida tumbil)위우세충(IRI≥500);심수금선어(Nemipterus bathybius)、사청(Gemphylus serpens)、흑(Lophiomus setigerus)、대두구모어(Trachinocephalus myops)、대어(Trichiurus leptu-rus)、화반사치(Saurida undosquamis)화장체원#(Decapterus macrosoma)등위주요충(100≤IRI<500)。취류분석표명춘추계적우세물충결구상사성교고。봉부도지수( D)재하계체도최고,동계최저;다양성지수( H′)하계최고,최소치출현재추계;균균도지수(J′)추계최저,기타3개계절변화불대;우세도지수(λ)추계최고,하계최저。
According to the bottom trawl survey data in southwestern continent shelf of Nansha area in different seasons of 2013,we analyzed the species composition and biodiversity indices. We collected 251 species,including 202 fish species,16 cephalopod species and 33 crustacean species. The total number of species of catch composition was the highest in summer and the lowest in winter. According to the index of relative importance( IRI),the dominant species were Priacanthus macracanthus,Uroteuthis edulis and Saurida tumbil,whose IRIs were higher than 500;the main species were Nemipterus bathybius,Gemphylus serpens,Lophiomus setigerus,Trachinocephalus myops,Trichiurus lepturus,Saurida undosquamis,Decapterus macrosoma,and so on,whose IRIs were 100~500. Cluster analysis indicates that the dominant species structure was more similar between spring and autumn. The Margalef richness index( D)reached the maximum in summer but the the the minimum in winter;the Shannon-Weiner diversity index( H′) reached the maximum in summer but the minimum in autumn;Pielou index( J′)reached the minimum in autumn,but there was little difference among the other three seasons;dominance index(λ )reached the maximum in autumn but the minimum in sum-mer.