Intertidal sand‐dwelling Peracarid fauna of Stewart Island     

A. A. Fincham 《新西兰海洋与淡水研究杂志》2013,47(1):1-14

Abstract

The distributions of infaunal Peracarida (Crustacea) and their correlation with sediment type, tidal height, and degree of exposure were studied in winter (June) at five beaches on Stewart Island, New Zealand. The beaches were selected lo cover a range of exposures to wind and wave action and substrate sorting. Substrate and infauna samples were taken at four tidal levels from each, with a 0.0625 m² quadrat.

Sieve separation and statistical analysis of the substrate samples indicated predominantly sand‐sized particles from all beaches, with median diameters in the range +1.52 to +2.92 ? (phi) units. Substrates were well sorted throughout the size range: ? quartile deviation ranged from 0.26 to 0.71, skewness from —0.18 to +0.07 ?.

Peracarid fauna was generally abundant, with a maximum of 29 136 per m²sampled in a more sheltered beach. Cumacea was the most abundant group, followed by Amphipoda, Isopoda, and Tanaidacea; dominance followed a similar sequence, being 78%, 19%, 2% and 1% respectively. Frequency of occurrence at the 19 stations was headed by Amphipoda (100%), with Isopoda 53%, Cumacea 32% and Tanaidacea 11%.  相似文献   

大亚湾海域石斑鱼(Epinephelus spp.)寄生单殖吸虫群落结构研究   总被引：1，自引：0，他引：1  

曾碧健  黄建荣  杨廷宝 《海洋与湖沼》2017,48(2):406-414

调查了大亚湾海域13种石斑鱼(Epinephelus spp.)寄生单殖吸虫群落,结果发现有10种鱼感染单殖吸虫,占调查鱼种类的四分之三,检获单殖吸虫16种,隶属于3科5属,其中拟合片虫属(Pseudorhabdosynochus spp.)10种;除鞍带石斑(E.lanceolatus)和拟青石斑(E.fasciatomaculosus)外,8种鱼可分别感染3—7种单殖吸虫;感染单殖吸虫种类最多的是玳瑁石斑(E.quoyanus)达7种,次之是青石斑(E.awoara)和养殖的橙点石斑(E.bleekeri)均感染6种;各单殖吸虫种类中,感染强度最大的是拟合片虫(P.serrani))(棕点石斑,E.fuscoguttatus)128只/尾,次之是石斑拟合片虫(P.grouperi)(青石斑)62只/尾,接下来是斜带拟合片虫(P.coioidesis)(大斑石斑,E.macrospilos)59只/尾和杯阴拟合片虫(P.cupatus)(玳瑁石斑)49只/尾;平均密度最高的是棕点石斑上检获的拟合片虫128只/尾;在检获的16种单殖吸虫中,8种可分别寄生于2种或2种以上石斑鱼,石斑鳞盘虫(Diplectanum grouperi)和拟合片虫在6种石斑鱼上都能检获,符合广寄生单殖吸虫种特征。有5种鱼检查尾数5尾以上的,其中玳瑁石斑单殖吸虫感染率最高62.07%,其内群落的物种丰富度与宿主体长呈显著正相关。  相似文献