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| Fishery Resources in Waters of Dalian Seal Nature Reservation Zone |
| TIAN Jia-shen,HAN Jia-bo,ZHANG Ming,LI Hua-lin,LU Zhi-chuang |
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Abstract T he fishery resources survey in Dalian seal nature reservation zone and the adjacent sea area were conducted at 15 sampling stations on later March of 2012 by underground trawling to evaluate the community structure and spatial patterns of heterogeneity of nekton .A total of 34 nektons were collected during the survey ,belonging to 9 orders including 17 fish species ,9 shrimp species ,6 crab species and 2 cephalopod species .However ,29 nektons were found in reservation zone including 16 species of fish ,12 crustaceans and 1 cephalopod ,and 24 nektons were collected in the adjacent area including 11 species of fish ,12 crustaceans and 1 cephalopod . A total of 17 species nektons showed single-species catch proportion of more than 1% of the total catches in number ,16 species in the reservation zone and 10 species in the adjacent area .There were 4 species nektons showing single-species density of over 1% in both the reservation zone and the adjacent area .In the reservation zone ,the richness indices (Margaler) was ranged from 1 .01 to 2 .36 ,with an average of 1 .52 ,the species diversity indices (Shannon-Wiener) from 1 .27 to 3 .39 ,with an average of 2 .458 ,and the evenness indices (Pielou) 0 .38~0 .91 ,with an average of 0 .71 .In adjacent sea area ,the richness indices was found between 0 .94 and 1 .63 ,with an average of 1 .37 ,the species diversity index 1 .50~2 .71 ,with an average of 1 .998 ,and the evenness indices 0 .38 ~ 0 .78 , with an average of 0 .573 , showing the higher species diversity index in the reservation than in other areas .
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Received: 25 November 2013
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