Preliminary Investigation of Fishery Resources in Lishui Section of Oujiang River

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1 http / /xuebao. jxau. edu. cn Acta Agriculturae Universitatis Jiangxiensis E - mail ndxb7775@ sina. com * % 1 Distoechodon tumirostris Sinibrama macrops Pelteobagrus fulvidraco % % % Margalef D ~ Shannon - Wiener H' Pielou J' / st st Q A Preliminary Investigation of Fishery Resources in Lishui Section of Oujiang River LIAN Qing-ping 1 YUAN Ju-lin 1 ZHANG Ai-ju 1 YAO Zi-liang 2 WANG Kai-wei 2 LU Jun 2 MI Guo-qiang 1* 1. Institute of Freshwater Fisheries of Zhejiang Province Huzhou China 2. Fishery Technology Extension Station in Lishui City Zhejiang Province Lishui China Abstract This paper deals with the survey of fish resources and analysis of species diversity in Lishui section of Oujiang River. Fish were collected monthly at 3 stations in March 2009 June 2009 and February The results showed that a total of fish were collected. The total of 53 species belong to 5 orders 13 families and 41 genera. The species of Cypinifomes has the highest number in population 37 species belong to Cyprinidae accounting for % of total samples. The Siluriformes and Perciformes came in second. The numbers of species of the Anguilliformes and Synbranchiformes were comparatively smaller only 1 species. The dominant species were Distoechodon tumirostris Sinibrama macrops Pelteobagrus fulvidraco accounting for % % and % of the total samples. The characters of the fish fauna can be divided into the marine fishes and freshwater fishes among the catch. The Margalef index was decling during the period from July 2009 to January 2010 the highest being in July The Shannon - Wiener diversity index was invariable throughout the whole year and relatively high in July and August The Pielou evenness C E - mail Lianqp2001@ 163. com * E - mail zjmgq@ 163. com

2 index was inariable throughout the whole year. Hemibarbus laleo Bagridae Siniperca scherzeri Siniperca chuatsi were the main economic species in the Lishui section of Oujiang River. The average density reached ind. /net on June The number of species collected in station 2 was the largest in a year which was 40. The number of species collected in station 3 was the smallest in a year which was 27. Key words in Lishui section of Oujiang River fishery resources diversity km km st ' E 28 18' N st ' E 28 20' N st ' E 28 27' N m 1. 5 m 15 cm 3 cm 220 V ~ h ~ h Fig. 1 1 Sampling stations for collecting fish in Lishui section of Oujiang River % 1. 2 Margalef D Shannon - Wiener H' Pielou J' 8 1 relative density RD RD = n i /N 100%

3 % - 1% ~ 10% - 1% 3 Margalef D = S - 1 /lnn 4 Shannon - Wiener H' = - ΣP i ln P i 5 Pielou J' = H' /lns n i i N S P i i % % 1. 89% % % % % % % % % Fig. 2 2 Monthly changes of species number individual number Distoechodon tumirostris % Sinibrama macrops % Pelteobagrus fulvidraco % Carassius auratus auratus 8. 41% Pseudobagrus albomarginatus 7. 83% Hemibarbus laleo 6. 05% Acrossocheilus kreyenbergii 4. 42% 9 Silurus asotus 0. 89% Cyprinus carpio carpio 0. 81% Culter mongolicus mongolicus 0. 43% % % % ~ % Fig. 3 Monthly changes of the diversity indexes

4 Margalef D Shannon - Wiener H' Pielou J' D H' J' Tab. 1 1 Fish species composition in Lishui section of Oujiang River Species Anguillidae /% Relative density /mm Rang of body length Month Anguilla japonica Cyprinidae Leuciscinae Ctenopharyngodon idella ~ ~ 8 10 ~ 11 2 Mylopharyngodon piceus + Squaliobarbus curriculus + Danioninae Opsariichthys bidens ~ Zacco platypus ~ Culterinae Hemiculterella wui ~ ~ 12 2 Sinibrama macrops ~ ~ 12 1 ~ 2 Erythroculter ilishaeformis ~ ~ Culter mongolicus mongolicus ~ ~ 9 Megalobrama amblycephala + Parabramis pekinensis Xenocyprininae Distoechodon tumirostris ~ ~ 12 1 ~ 2 Xenocypris davidi ~ ~ 9 12 Acheilognathinae Rhodeus sinensis ~ Rhodeus ocellatus ocellatus Hypophthalmichthyinae Aristichthys nobilis ~ 8 Hypophthalmichthys molitrix Barbinae Spinibarbus hollandi + Acrossocheilus kreyenbergii ~ ~ 11 1 ~ 2 Acrossocheilus wenchowensis wenchowensis Cyprininae Cyprinus carpio carpio ~ ~ 12 1 ~ 2 Carassius auratus auratus ~ ~ 12 1 ~ 2 Gobininae Hemibarbus laleo ~ ~ 12 1 ~ 2

5 2 355 Tab. 1 1 Fish species composition in Lishui section of Oujiang River Hemibarbus maculatus ~ Pseudorasbora parva ~ Pseudorasbora elongata ~ Sarcocheilichthys kiangsiensis Sarcocheilichthys nigripinnis ~ Sarcocheilichthys sinensis ~ Belligobio nummifer ~ 12 6 Gnathopogon taeniellus ~ ~ 12 2 Abbottina rivularis Pseudogobio vaillanti vaillanti ~ ~ 11 Cobitidae Cobitis sinensis Misgurnus anguillicaudatus ~ Leptobotia tientaiensis compressicauda ~ Homalopteridae Vanmanenia stenosoma stenosoma Clariidae Clarias fuscus ~ ~ 8 Siluridae Silurus asotus ~ ~ 11 Bagridae Pelteobagrus fulvidraco ~ ~ 11 1 ~ 2 Pelteobagrus vachelli ~ ~ 12 1 ~ 2 Pelteobagrus nudiceps ~ ~ 7 Pseudobagrus albomarginatus Pseudobagrus tenuis ~ ~ 12 1 ~ 2 Ophiocephalidae Channa argus + Symbranchidae Monopterus albus ~ Serranidae Siniperca chuatsi Siniperca scherzeri ~ ~ 11 2 Eleotridae Eleotris oxycephala Odontobutis obscura Gobiidae Rhinogobius giurinus ~ ~ Mastacembelidae Macrognathus aculeatus st. 3

6 st. 1 st % Margalef 29 Margalef D D H' J' % 1% ~ 10% 1% %

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