| [effects of macro-jellyfish abundance dynamics on fishery resource structure in the yangtze river estuary and its adjacent waters]. | based on the bottom trawl survey data in may 2007 and may and june 2008, this paper analyzed the effects of the abundance dynamics of macro-jellyfish on the species composition, distribution, and abundance of fishery resource in the yangtze river estuary and its adjacent waters. from may 2007 to june 2008, the average catch per haul and the top catch per haul of macro-jellyfish increased, up to 222.2 kg x h(-1) and 1800 kg x h(-1) in june 2008, respectively. the macro-jellyfish were mainly distr ... | 2011 | 22384604 |
| [distribution of nekton stock density and its community structure in taiwan strait in summer and autumn]. | this research was conducted based on the bottom trawl surveys in summer and autumn. an analysis on the stock density and community structure of nekton in taiwan straits indicated that the average stock density was 8.50 kg x h(-1) in summer and 6.94 kg x h(-1) in autumn. the species number was 80 in summer and 91 in autumn, and the abundance, species diversity index, and evenness index were all higher in autumn than in summer. the average species diversity index was 2.0466 in summer and 2.3964 in ... | 2005 | 16422520 |
| [spatial heterogeneity of trichiurus japonicus and small-scale fish in east china sea and their spatial relationships]. | based on the investigation at 121 positions in east china sea in 2001 autumn, this paper analyzed the spatial heterogeneity of hairtail (trichiurus japonicus) and seven kinds of small-scale fish (setipinna taty, collichthys lucidus, champsodon capensis, amblychaeturichthys hexanema, acropoma japonicum, benthosema pterotum and apogon lineatus), and the spatial relationships among them. the results indicated that the semivariogram curve of hairtail was very similar to those of apogon lineatus, amb ... | 2005 | 16011172 |