Detritivory in the mangrove sesarmid crab parasesarma erythodactyla
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: Detritivory in the mangrove sesarmid crab parasesarma erythodactyla
Detritivory in the mangrove sesarmid crab parasesarma erythodactyla
Detritivory in the mangrove sesarmid crab Parasesartna erythtfdactylaThi Hong Hanh Bui. B.Sc. (Hons.) UNSW, M.Sc. NƯSGriffith School of EnvironmentGri Detritivory in the mangrove sesarmid crab parasesarma erythodactyla iffith Sciences GroupGriffith UniversitySubmitted in fulfilment of the requirements of the degree ofDoctor of Philosophy41852ABSTRACTSesarmid crabs have important ecological roles in the mangroves of the Indo-west-Pacific biogeographic region. By processing large amount of leaf litter, these crabs r Detritivory in the mangrove sesarmid crab parasesarma erythodactyla etain organic matter in the mangroves, increase the rate of mineralisation, and fuel additional trophic links with the processed material. However, thDetritivory in the mangrove sesarmid crab parasesarma erythodactyla
e dietary composition of the mangrove scsannids is still a controversy. Gul content analyses suggest a dominant contribution of mangrove leaf litter iDetritivory in the mangrove sesarmid crab Parasesartna erythtfdactylaThi Hong Hanh Bui. B.Sc. (Hons.) UNSW, M.Sc. NƯSGriffith School of EnvironmentGri Detritivory in the mangrove sesarmid crab parasesarma erythodactyla In addition, ability of the sesannid crabs to obtain sufficient nutrition from mangrove litter, which is rich in structural carbon (cellulose) but poor in other nutrients such as nitrogen, has been questioned. The overarching goal of this thesis was to fill these gaps of knowledge in detritivory of Detritivory in the mangrove sesarmid crab parasesarma erythodactyla the mangrove sesarmids, using Parasesarma erythodactyia (Hess, 1865). the dominant shredder in subtropical Australian mangroves, as an animal model.TDetritivory in the mangrove sesarmid crab parasesarma erythodactyla
he role of mangrove leaf liner in the diet ofp. erythodactyia was evaluated though a series of feeding experiments. Using natural abundance and dual-lDetritivory in the mangrove sesarmid crab Parasesartna erythtfdactylaThi Hong Hanh Bui. B.Sc. (Hons.) UNSW, M.Sc. NƯSGriffith School of EnvironmentGri Detritivory in the mangrove sesarmid crab parasesarma erythodactyla weeks), and assimilated mangrove carbon and nitrogen at the efficiency of 36% and 56.6%. respectively. Experimentally determined carbon and nitrogen trophic discrimination values (Ao1;c and AÔ1?N) between p. erythodactyla and its three potential food sources, namely mangrove leaf litter, microphyto Detritivory in the mangrove sesarmid crab parasesarma erythodactyla benthos and prawn muscle, were significantly different fiom the global mean values (-+1 for AỒ1 c and +3 for Ao 'N) commonly used for interpretation oDetritivory in the mangrove sesarmid crab parasesarma erythodactyla
f stable isotope data on mangrove food webs. The close proximity between AS1 ■ĩC(crob.mftnsfwei determined by this study (+5.45%O ) and rhe differenceDetritivory in the mangrove sesarmid crab Parasesartna erythtfdactylaThi Hong Hanh Bui. B.Sc. (Hons.) UNSW, M.Sc. NƯSGriffith School of EnvironmentGri Detritivory in the mangrove sesarmid crab parasesarma erythodactyla alues may apply to other mangrove sesarmids feeding on mangrove litter. Dietan' composition calculated by the IsoConc mixing model based on trophic discrimination values determined in this study supports a dominant contribution of mangrove leaf litter to the crab's diet (89% in terms of biomass). To Detritivory in the mangrove sesarmid crab parasesarma erythodactyla gether, these results reinforce the notion that sesarmid crabs are the key initial processor of mangrove primary production, particularly in the Indo-Detritivory in the mangrove sesarmid crab parasesarma erythodactyla
west-Pacific. where mangrove sesannids are most diverse and abundant.Unlike other detritivores. sesarmid crabs are capable of assimilating fresh mangrDetritivory in the mangrove sesarmid crab Parasesartna erythtfdactylaThi Hong Hanh Bui. B.Sc. (Hons.) UNSW, M.Sc. NƯSGriffith School of EnvironmentGri Detritivory in the mangrove sesarmid crab parasesarma erythodactyla ld exploit this low-quality food source, however, remains unclear. Using a molecular approach. I showed that mangrove detritivorous crabs are physiologically adapted to utilizing cellulose-rich mangrove detritus, the most abundant carbon source in this ecosystem, by possessing endogenous cellulose h Detritivory in the mangrove sesarmid crab parasesarma erythodactyla ydrolysis enzymes. Direct evidence of endogenous cellulase production not only in p. erythodactyla but also in other crabs of Sesarmidae, Varunidae, MDetritivory in the mangrove sesarmid crab parasesarma erythodactyla
acrophthalmidae. Heloeciidae, and Ocypodidae families is presented. The cDNA sequences encoding endo-p-1.4-glucanase. one of the key enzymes required Detritivory in the mangrove sesarmid crab Parasesartna erythtfdactylaThi Hong Hanh Bui. B.Sc. (Hons.) UNSW, M.Sc. NƯSGriffith School of EnvironmentGri Detritivory in the mangrove sesarmid crab parasesarma erythodactyla demonstrated that the essential amino acid Threonine, Isoleucine, and Phenylalanine and the long-chain polyunsaturated fatty acid, docosahexaenoic acid (DHA), could be de novo synthesized in p. erythodactyla. possibly with assistance from its gut microflora. In addition to nutrients derived from an Detritivory in the mangrove sesarmid crab parasesarma erythodactyla imal and microphytobenthos food, these de novo synthesisediiinutrients represent a subsidy for the nitrogen and I.C-PUFA deficient mangrove litter dieDetritivory in the mangrove sesarmid crab parasesarma erythodactyla
t of the crab.f indings of this study rc-affirm the important role of the scsannid crabs in mangrove organic matter dynamics. Through the sesarmid linDetritivory in the mangrove sesarmid crab Parasesartna erythtfdactylaThi Hong Hanh Bui. B.Sc. (Hons.) UNSW, M.Sc. NƯSGriffith School of EnvironmentGri Detritivory in the mangrove sesarmid crab parasesarma erythodactyla values, supporting the nutrition of fauna in the mangrove and connected habitats.STATEMENT OF ORIGINALITYThis work has not previously been submitted for a degree or diploma in any university. To the best of my knowledge and belief, the thesis contains no material previously published or written by a Detritivory in the mangrove sesarmid crab parasesarma erythodactyla nother person except where due reference is made in the thesis itself.Thi Hong Hanh BuiVTABLE OF CONTENTSABSTRACT.....................................Detritivory in the mangrove sesarmid crab parasesarma erythodactyla
.........................iiSTATEMENT OF ORIGINALITY...............................................VLIST OF FIGURES....................................Detritivory in the mangrove sesarmid crab Parasesartna erythtfdactylaThi Hong Hanh Bui. B.Sc. (Hons.) UNSW, M.Sc. NƯSGriffith School of EnvironmentGri Detritivory in the mangrove sesarmid crab parasesarma erythodactyla ..............XACKNOWLEDGEMENTS......................................................xiCHAPTER 1. INTRODUCTION................................................11.1Genera 1 overview...............................................11.2Role of sesarmid crabs in tropical mangrove ecosystems..........31.3Fe Detritivory in the mangrove sesarmid crab parasesarma erythodactyla eding ecology of grapsoid crabs...............................71.4Parasesaima erythodactyla - the dominant sesarmid crab in the eastern AustralianDetritivory in the mangrove sesarmid crab Parasesartna erythtfdactylaThi Hong Hanh Bui. B.Sc. (Hons.) UNSW, M.Sc. NƯSGriffith School of EnvironmentGriDetritivory in the mangrove sesarmid crab Parasesartna erythtfdactylaThi Hong Hanh Bui. B.Sc. (Hons.) UNSW, M.Sc. NƯSGriffith School of EnvironmentGriGọi ngay
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