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B e a ch shell m olltISks of ls e a nd O s ak a Bays, s o uth w c ste rtl H o n sh u,

Ja pan

】Ⅶ E R C Y V E R A R O P R E C I O

h p a rtial h lfillm e nt of t he r equ i r e m e nts

fo rth e deg r e e of

M [a ste r of Scie t) c e E d u c atioTI

M ie t 加iv e r sity

G r adt) ate S ch o ol of E dt) c atio 皿

D epa rt m e nt of E a rt h Scie n c e

Ja n u a ry 2 8,2 00 8

A J) V I S E R :

D R . Y tlT A E A tIO N D A

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別 紙 様 式3

重 大学 院教 育学研 究 科

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別 紙 様 式4

重 大教 育学研 究

科 教 科 教 Op R ECIO M E RC Y V E R A R

A bstra ct: Al ong wi th T ok y o B ay, Is e a nd Os aka 8 ays of

s outh w e ster n H o nsh u are repre s entativ e one s in Japan . I c olle cted s a nd

be a ch sb d )s at rI Ve are a s(S a m ba sh i, Ch i yoz aki, TstI Z t) mi ga t) r a, G ote m ba ,

a nd G on tIShj) of t he w e ste r n c oa st of ls e B ay betw e en M ay 20 04 an d A pri)

2 007; t ho s e at t hre e a re a s(N ishi kino ha m a, H akotsuku ri, atld T a r ui) of t he

s o utheaster II C o a st Of O s aka B ay betw e en A tlg u St 20 0 6 a nd Ju n e 2 0 0 7. A

total of $ 1 spe cie s ar e i de nti r)ed at 13 )o c alitie s of the w e ster n c o a st of Is e

Bay, a nd 1 0 5 spe cie s at 1 0 lo c alitie s of t he s o ut he a stern c o a st of O s aka

Bay. Six alien spe cie s ar e re c ognized: CllePidula o t lyX So we rb y , P o m q c e a can aLt

'

ciLEd a (L a m ar ck), Pe m a v L'm 'dk's (L in n a et )s), X e n o stTObu s s ec w l.S

(La m a rc k), M u etTIIx p ete chL

'd L

'

s (La m ar ck) alld C w bL'c ula P u m L

'

n e a

( M 白.ller).

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T A B L E O F C O N T E N T S

L I S T O F T A B L E S L I S T O F F I G U R E S L I S T O F P L A T E S

A C K N O W L E D G M E N T S A B S T R A C T

1 .I N T R O D U C T I O N 2 . M E T H O D O F S T U D Y

3 . R E S U L T S A N D D I S C U S S I O N

3 .1 S pe cie sdive r sity of Is e a nd Os aka be a ch shells

3 .2 C om pa ris o n of &equ e n cy a nd distri butio n

3 .3 Al ie n or n o n native spe cie s

3 .4 M ollus c an a s s emb lage sin th e s and be a che s of Is e B ay 3 .5 M ollu s c a n a s s e mb lage sinthe s a nd be a che s of Os aka Bay

3 .6 S yste m atic n ote s ofs o m eim po rta nt spe cie s

4. S U M Y R E F E R E N C E S

page

ⅤトV l l 1

v i ii ix

1 2 5 6 2 4 2 5 9 4 2 5 2 7 3 3 3 3 3 4 3 6 3 6 3 7 3 9 7 0 9 5 9 6 9 9

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L ist of Tab le s

Tab le 1. O c c u r r e n c e s of be a ch shells ofthe w e ste rn c o a st of Is e B ay. Tab le2 . O c cu rr e n c e s of be a ch shells ofthe s o uthe a ste rn c o a st of

O s aka B ay.

Tab le3 . C o mparis o n oftaxo n o mi c c o m po sitio n ofbe a ch shell M ollusksbetw e en Is e an d O s aka B ay .

T ab le4a. R elativ el y domi n a nt spe cie sin ls e B ay . T ab le4 b . Relativ el y do mi na nt spe cie sin Os aka Bay. T ab le5a. Sim ps on

'

s index(n total nu mber of ind ividuals of a

partic ular spe cie s; N total nu m ber of indi vi du als of all

spe cie sin ls e Bay .

T ab le5 b .S imps o n'sIndex(n total n u mber of indivi du als of a

Pa rticularspe cie s;N total nu mber of indivi du als of all

spe cie sin O s aka B ay .

T able6 . N u m ber of indivi duals(pe r1 0 sq. m) of ls e a nd O s aka B ays.

3 0 3 2

8 8

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L ist of F i gure s

F ig.1 . M ap of ls e B ay showl ng th e s a m pling lo cal itie s and w ate r

deps(in m ete r s).

F i g.2 . M ap of Os aka B ay sho w i ngthe s a mp ling lo c alitie s an d w ate r

dep 血s(in m eters).

F i g3a M ap show i ng thelo c atio n of Sam ba shi be a ch, Y ok k ai ch i C ity.

F ig3 b Oc cu 汀 e n C e Of be a ch shells at Sa mba sh i be a ch and sketch

oftilebe a ch.

F ig.4a. M ap show ing thelo c atio n of C hi yozak i be a ch,S u z uka C ity . F igs.4 b . O c currenc e s ofbe a ch shells at C hi yozakibe a cll and sketch

ofthebe a ch.

F ig.5a. M ap sho w i ng thelo c atio n of Ts uz u m lga ur abe a ch .

F ig.5b .O c cu汀 e n C e S Ofbe a ch shells at Tsu z um lga urabe a ch an d

sketcb ofthebe a ch .

F ig.6a. M ap show ing thelo c atio n of G ote mbabe a ch, Ts u C ity F ig6 b O c c urr e n c e of be a ch shells at G ote mba be a ch a nd sketch

ofthe be a ch.

F ig7a M ap showing thelo c ation of G onu sh i be a ch, M ats u s ak a C ity

page

V l

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page F i g7 b O c cu rr e n c e ofbe a ch shells at G o n u sh i be a ch a nd sketch of

ebe a cbー.

F i g 8a M ap showing the lo c atio n of N ish ik in oha m abe a ch, K aiz uka C ity F i g 8 b O c ct m enc e s of be a ch shells at N ish ik in oha m a be a ch and sketch

of th e be a ch .

F ig 9a M ap sho w ing thelo c atio n of T ar uimi nami be a ch,T ar ui C ity F i g.9 b O c c u m nc e of be a ch shells at T ar uimi n ami be a ch aJld sketch

ofthebe a ch.

F i g 1 0a. M ap sho w m gthelo c ation of H ak ots ukuri be a ch, Se n n a n C ity F i g 1 0 b O c cu rr enc e of be a ch shells at H akots ukuri be a ch an d sketch

of the be a ch.

F ig1 1 G o nush i be a ch a nd sketch ofthe s a nd be a ch sho w lngthe sho r eline

a nd qu adrat(1 0 m 2)p loIIed in the s e a shore.

F i g1 2 A B S pe cie sA re a C u rv e of be a ch shells of ls e B ay a nd Osa ka B ay F i g.1 3 A B C olle ctio n ofbe a ch shells of Is e a nd Os aka B ays

F i g 1 4 C o m po sitio n at cla s sle v el in Is e and Os akabays F i g. 1 5a. S pe cific c o m po sitio n in Sa m ba shi be a ch(Lo c s 1, 2,3).

F i g .1 5 b. S pe cific c o mpo sitio nin C hi yozak i be a ch(L o c 4) A

F i g .1 5c.S pe cific c o m po sitionin Ts uzu mi ga ura be a ch(Lo c s5,6,7)

F i g .1 5d. S pe cific c o mpo sitio n in G ote m ba be a ch(L o c s 8,9,1 0).

F ig .1 5e.S pe cific C O mPO Sitio nin G o nush i be a ch(Lo c s1 I, 1 2,1 3)

2 2

2 3 2 4 8 3 8 7 9 1 9 1 9 2 9 2 9 3

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F i g. 1 6a.S pe cific co mp o sitionin N ish ik inoha m abe ach(L o c s1,2 ,3, 4),

F i g .1 6 b. S pe cific c o mpo sitionin T a ruiminami(L o c sL5 ,6,7)I

F i g .1 6c.S pecific c o m po sitionin H akots uku ri be a ch(L oc s8,9,1 0)I

L ist of P late s

Is e Bay be a ch shells

P late 1 3 a nd P late exp lanatio n

O s aka Bay be a ch shells

P late 4 15 and P late explanation

7 ト7 6

7 7 8 2

viii

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A C K N O W t E D G M E N T S

M y sin c e r e st th anks to m y ad vis o r Pr of Y utak a H o nda fo r his patie n c e wi th m e

duri ng the s e p a st tw o ye a r s and critic al re ad ing of the m a n us c rlPtI als o wi sh to tha nk prof. N obu n ari Ito and Taich ir o G oto fo r their val u ab le c o m m e nts a nd help . M y he artfelt

gr atitudetothe Soroptlmistlnte rn ado n al of M iefortheirfin ancial s up po rtI a m indebted to p rof. E m eritu s N obutaka Ito for h is tru st and enc ou rage m e nt. M y spe cial th a nks to

R odri go Pe chon forh is help during my spe cim en c olle ction and te chnic al advic e s,to my family fo r their un failing s up port and prayer s,to all m y 丘ie nds for their unde r stan ding

and c o n c e rn a nd to alltho s e who in one w ay o r a n oth e r had exte nded their help in the

f

u lfillm ent of m y ptO S ein c o m l ng tO Jap m A bo v e all I tha nk the Lo rd Al mig hty fo r t

h e gi of str eng th a nd c o urage

1 Ⅹ

参照

Outline

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