MORPHOLOGY AND TROPHIC PARTITIONING IN SOME THAI STREAM FISHES IN THONGPHAPHUM

Name: BELINDA M.S. WARD-CAMPBELL

ThaSH: MORPHOLOGY

ThaSH: STREAM FISH

ThaSH: DIET

ThaSH: ECOMORPHOLOGY

ThaSH: มหาวิทยาลัยบูรพา -- สาขาวิชาชีววิทยา

Abstract: The objectives of this study, based on the ecomorphological principle that morphology influences resource use, are three-frold. the frist objective was to exmine ontogenetic shifts in diet and mirphology within a dominant predatory species Channa gachua.. the second objective was to examine difference in feeding ecology and morphology amongst the dominant family of Cyprinidae. The final objective was to examine the morphological and dietary differences among common riffle-dwelling fishes. The diet of C.gachua was examined in relation to mass, mouth and body morphlogy and intestine legth to examine the corresponding changes in diet with mirphology. Cluster analysos was performed on the prey-specufuc abybdabec vakyes of the dicgtary items, and yielded four size-classes based on diet. There was a shift from ditritus and smaller benthic invertebrates in the diet of the frrst size-class, to amainly piscivorous dict in the fourth size-class as well a steep increase in mass at the onset of piscivory. No significant change in relative intestine length was found with ontogeny,and the average relative intestine length value for C.gachua indicated primarily carnivorous feeding habits habits throughout throughout ontogeny.Ontogeneitic changes inmouth dimensions account primarily forthe shift in diet, however, the ontogenetic change in body morphology is of secondary importance. The diet of seven coexosting cypronods was examined in conjunction with morphological characters of the mouth and body, in Kanchanburi, Thailand,Rasbora caudimaculata, Osteochilus hasselti, Cyclocheilichthys apolgon,Garra fuliginosa, Danio acrostomus, Systomus binotatus, and Mystacoleucas marginatus were all found coexisting in riffle habitats.Overall dietaty overlap was low, and diets ranged from detritus and algae for O. hasselti and G. fuliginosa through benthic invertebrates for C.apogon,S binotatus and M.marginatus, to terrestrial tinvertebrates for R. caudimaculata and D.acrostomus.Principal component analysis (PCA)elucidated the clear separation of. O hasselti and G.fuliginosa, as well as differences inmorphology of the other five species.Canonical corespondenec analysis (CCA)described relationships between the mirphological characters and the diets of the seven species.Motphological characters. in particular mouth height and position body width and depth.and digestive tract length,accounted for differences in diet in the seven Cyprinids. allowing them to coexist.Morphological characteristics were examined in tandem in tandem with intesting content analysis for five species of co-existing freshwater fish in Thailand. Rasbora caudimaculata,schistura desmotes, Dermogenys pusillus,Xenentodon cacila and Monopterus albus are all found in riffle habitats in Thai streams.Rcaudimaculata,S desmotes and D. pusillus feed predominantly on ephemeropterans,hymenopterrans and dipterans.X.cancila feeds predominantly on fish. and larger aquatic invertebrates such as odonata and M. albus feeds on detritus as well as invertebrate prey such as crustaceans and odonata. Intestine length, mouth height, mouth width,eye position and mouth orientation varied among all five species.Canonical analysis of discriminance of mouth height, width and intestine length showed a clear dispersion of species,whic was supported by intestine content,Murphology, in particular differences in mouth dimensions, accounted for differences in diet among the five species,allowing them to co-exist.

Burapha university. Library

Address: ชลบุรี (Chonburi)

Email: buulibrary@buu.ac.th

Name: F.W.H. Beamish

Role: Advisory Committee

Name: Kashane Chalermwat

Role: Committee

Name: Vipoosit Manthachitra

Role: Committee

Created: 2004

Modified: 2550-01-22

วิทยานิพนธ์/Thesis

application/pdf

ISBN: 9749743977

tha

DegreeName: พยาบาลศาสตรมหาบัณฑิต

Level: ปริญญาโท

Descipline: ชีววิทยา

Grantor: มหาวิทยาลัยบูรพา

©copyrights มหาวิทยาลัยบูรพา

ลำดับที่.	ชื่อแฟ้มข้อมูล	ขนาดแฟ้มข้อมูล	จำนวนเข้าถึง	วัน-เวลาเข้าถึงล่าสุด
1	title.pdf	181.32 KB	16	2018-11-03 10:23:49
2	chapter1.pdf	66.33 KB	18	2018-11-03 10:24:24
3	chapter2.pdf	185.89 KB	10	2018-05-19 17:54:28
4	chapter3.pdf	266.02 KB	13	2018-05-19 17:54:29
5	chapter4.pdf	369.94 KB	15	2025-04-08 13:21:27
6	chapter5.pdf	273.1 KB	16	2025-04-08 13:21:11
7	bibliography.pdf	197.89 KB	9	2018-05-19 17:54:31
8	appendix.pdf	260.17 KB	14	2018-05-19 17:54:32

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