本文選題：漁業(yè)資源　切入點：群落結(jié)構(gòu)　出處：《南方水產(chǎn)科學(xué)》2017年02期

【摘要】：根據(jù)2015年11月珠江口南沙海域的漁業(yè)資源調(diào)查資料,對該海域秋季漁業(yè)資源群落組成、優(yōu)勢種和生物多樣性等群落結(jié)構(gòu)特征進行了初步研究。結(jié)果表明,該海域共出現(xiàn)漁業(yè)生物40種,以魚類和甲殼類為主。其中,底層魚類21種,中上層魚類3種,甲殼類16種。相對重要性指數(shù)(IRI)可用來度量物種的生態(tài)優(yōu)勢度,秋季優(yōu)勢種類有亨氏仿對蝦(Parapenaeopsis hungerfordi)和銳齒(Charybdis acuta)2種(IRI≥1 000)。該區(qū)域內(nèi)各站位質(zhì)量漁獲率為0.63~11.15 kg·h~(-1),平均為4.23 kg·h~(-1);尾數(shù)漁獲率為84~885尾·h~(-1),平均為433尾·h~(-1)。Shannon-Wiener多樣性指數(shù)(H')為2.07,Margalef豐富度指數(shù)(D)為1.64,Peilou均勻度指數(shù)(J')為0.59。分析表明,該海域漁獲物以小型經(jīng)濟甲殼動物和經(jīng)濟幼魚為主,漁獲個體偏小,總體上多樣性空間差異不大。與該區(qū)域2002年同月份的調(diào)查數(shù)據(jù)相比,目前漁獲物多樣性下降明顯,群落結(jié)構(gòu)相對簡單。
[Abstract]:Based on the survey data of fishery resources in Nansha area of Pearl River Estuary in November 2015, the community structure characteristics of fishery resources in autumn, such as community composition, dominant species and biodiversity, were preliminarily studied. There are 40 species of fishery organisms in this area, including 21 species of bottom fish, 3 species of pelagic fish and 16 species of crustaceans. The relative importance index (IRI) can be used to measure the ecological dominance of species. The dominant species in autumn were Parapenaeopsis hungerfordii and Charybdis acuta)2 species 鈮，

本文編號：1670733