[Morphological variations and discrimination of medium form of the purple flying squid Sthenoteuthis oualaniensis in the central and southern South China Sea].

From 3177 specimens of purple flying squid Sthenoteuthis oualaniensis collected in 2012 and 2013 in the central and southern South China Sea, the morphological indicators including mantle length (ML), arm length-I (AL1), arm length-2 (AL2), arm length-3 (AL3), arm length-4 (AL4), tentacle length (TL), fin length (FL) and fin width (FW) were measured. The morphological variations among the squid species were analyzed using principal component analysis. Results showed that the medium form could be distinguished into cohort I and cohort II which accounted for 69% and 31% of the total, respectively.

Changes of the Macrobenthic Faunal Community with Stand Age of a Non-native Mangrove Species in Futian Mangrove National Nature Reserve, Guangdong, China.

, a non-native superior rapidly growing mangrove species with wide environmental tolerance, has been introduced to Futian National Nature Reserve in Shenzhen, Guangdong, China, for mangrove restoration since 1993. However, the community structure of the associated macrobenthic fauna, a vital component of energy ow and nutrient recycling, remains obscure. The present study analyzed the macrobenthic faunal community, associated habitat characteristics and physico-chemical properties of sediment in rehabilitated forests at stand ages of 8, 9, 14, 16 and 20 years from November 2014 to May 2015.

Heavy metals in fish tissues/stomach contents in four marine wild commercially valuable fish species from the western continental shelf of South China Sea.

The concentrations of heavy metals (Cd, Pb, Cr, Ni, Cu and Zn) were determined in four commercially valuable fish species (Thunnus obesus, Decapterus lajang, Cubiceps squamiceps and Priacanthus macracanthus), collected in the western continental shelf of the South China Sea. Concentrations of Cd, Pb, Cr, Ni, Cu, and Zn in fish muscles were 0.006-0.

Polycyclic aromatic hydrocarbons in surface sediments and marine organisms from the Daya Bay, South China.

Polycyclic aromatic hydrocarbons (PAHs) were investigated in the marine ecosystem of the Daya Bay, South China. The PAH concentrations ranged from 340 to 710 ng/g dry weight in the sediments and from 110 to 520 ng/g wet weight in marine organisms, respectively. The dominant compounds were three- and four-ring PAHs in the sediments (53%-89%) and two- and three-ring PAHs in the marine species (67%-94%), respectively.

Fuzzy comprehensive assessment of heavy metals and Pb isotopic signature in surface sediments from a bay under serious anthropogenic influences: Daya Bay, China.

The fuzzy comprehensive assessment was undertaken to evaluate the marine sediment quality in Daya Bay, China based on the monitoring data of 2015 and China National Standard for Marine Sediment Quality (GB 18668-2002). The results demonstrated that the average metal concentrations (mg/kg) were 0.08 (Cd), 51.

Heavy metal concentrations in wild fishes captured from the South China Sea and associated health risks.

Heavy metal concentrations were measured in 29 marine wild fish species from the South China Sea. Concentrations (wet weight) were 0.51-115.

[Effects of PM2.5 exposure on Klebsiella pneumoniae clearance in the lungs of rats].

Objective: To investigate the effects of PM2.5 exposure on susceptibility to Klebsiella infection and bacterial clearance, and to discuss its possible mechanisms.

Methods: Eighty-six healthy male SD rats were randomly divided into 4 groups: a control group, a Klebsiella pneumoniae infection group(infection group), a PM2.

[Residues and risk assessment of polycyclic aromatic hydrocarbons in the surface sediments and marine organisms from Dapeng Bay, Shenzhen].

In order to assess contamination by polycyclic aromatic hydrocarbons (PAHs), surface sediments and marine organism samples of fish, shrimp and shellfish were collected from the Dapeng Bay, Shenzhen in October 2011. Concentrations fof sixteen priority PAHs were determined by gas chromatography and mass spectrometry (GC-MS). The total concentrations of PAHs (Sigma PAHs ) ranged from 216.

Complete mitochondrial genome of the sixbar grouper Epinephelus sexfasciatus (Perciformes: Epinephelidae).

In this study, we presented the complete mitogenome for the sixbar grouper Epinephelus sexfasciatus. The complete mitogenome of E. sexfasciatus is 16,786 bp in length with the typical mitochondrial gene order and composition in vertebrates.

Levels, composition profiles and sources of polycyclic aromatic hydrocarbons in surface sediments from Nan'ao Island, a representative mariculture base in South China.

Levels, composition profiles and sources of 16 polycyclic aromatic hydrocarbons (PAHs) in surface sediments from Nan'ao Island, one of the largest mariculture bases in South China were investigated. The total PAHs concentrations ranged from 265.49 to 951.

Complete mitochondrial genome of the threespot grouper Epinephelus trimaculatus.

We present the complete mitochondrial genome of the three-spot grouper Epinephelus trimaculatus (16,761 bp) in this study. The gene order and orientation in E. trimaculatus were the same as the typical vertebrates.

Complete mitochondrial genome of the black-dotted grouper Epinephelus stictus.

The complete mitochondrial genome of the black-dotted grouper Epinephelus stictus was first determined in this study. It is 16,524 bp in length, including 13 protein-coding genes, two ribosomal RNA genes, 22 transfer RNA genes and one control region, with the typical gene arrangement in vertebrates. There are some variations in the initiate and terminal codons among 13 protein-coding genes.

[Variation characteristics of macrobenthos productivity in Daya Bay of South China Sea].

Based on the 7 cruises survey data collected from 63 research stations in the Daya Bay of South China Sea in January and July 1988 and in March, May, September and December 2004, the variation characteristics of the abundance, biomass, productivity, and P/B value of macrobenthos in the two years were analyzed by using Brey's empirical formula. The results showed that in 2004, the mean productivity and P/B value of macrobenthos in study area were 10.22 g AFDM x m(-2) x a(-1) and 0.