Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"Swim-bladder"”.
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Examining swim bladder inflation failure as a toxicological endpoint in Japanese medaka (Oryzias latipes)
Inadequate swim bladder inflation, while not being lethal itself, can have serious long-term effects on fish populations. Many environmental contaminants can inhibit swim bladder inflation of larval fish. Understanding how swim bladder inflation failure due to pollutant exposure occurs and …
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The Development and Role of Peripheral Auditory Structures in <i>Otocinclus affinis</i>
… pterotic bone) adjacent to their bi-lobed swim bladder. Since the swim bladders and the compound pterotic may act as an external ear for hearing in this taxon, I hypothesized that these swim bladders structures have an acoustical functional in the loricariid <i>Otocinclus affinis</i>. In …
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DISPERSAL MECHANISMS OF EMBRYONIC AND LARVAL BURBOT (LOTA LOTA)
… startle responses increased significantly after swim bladder inflation. From 30 - 75 dpf, larvae displayed no phototactic light preference. Younger larvae chose warmer temperature zones initially, preferring colder temperatures as they aged. Larvae performed positive rheotaxis after swim bladder …
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Sound Production in Two Loricariid Catfishes
… sounds via pectoral spine stridulation and/or swim bladder compression using sonic muscles attached to the swim bladder. The sound production capabilities and characteristics in Loricariidae, the largest catfish family, have not been well examined. Sounds produced by two loricariid catfish …
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Effects of Barotrauma on Four Species of Pacific Rockfishes (<i>Sebastes Spp.</i>)
… (genus <em>Sebastes</em>), have closed swim bladders that help them regulate their buoyancy. When anglers catch these fish and reel them to the surface, gases within their swim bladder expand due to the decrease in pressure. This can cause their swim bladder to over inflate––a condition …
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Helminth infections of the European eel Anguilla Anguilla in the United Kingdom
… nematodes (prevalence = 33.6%), the swim bladder nematode Anguillicoloides crassus (prevalence = 25.0%), acanthocephalans (prevalence = 30.0%) and cestodes (prevalence = 9.3%). Seven identified helminth species; the pathogenic pseudodactylids P. anguillae and P. bini, the pathogenic …
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Effects of benzo[a]pyrene and CYP19a1b knockdown on zebrafish development
… including body length, optic vesicle size, swim bladder inflation, pericardial and abdominal edema, and incidence of normal larval tail shape and these effects were reversed by exogenous E2-cotreatment. Decreased incidence of normal pectoral fins was only impacted by BaP exposure. In …
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Functional Morphology of the Sphyrnid Shark Cephalofoil: an Assessment of the Hydrodynamic Lift Hypothesis Using Computational Fluid Dynamics
… may produce beneficial dynamic lift as the shark swims (in similar fashion to the cambered wings found on many modern-day aircraft). As sharks do not possess a swim bladder, part of their energy intake is expended on simply maintaining vertical station in the water column. If indeed the …
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Early liver formation in zebrafish: a molecular and morphological approach
… - liver, pancreas, and the inner lining of the swim bladder - are derived from the endodermal germ layer. In zebrafish the digestive system starts out as a rod at the embryonic midline, which subsequently becomes patterned and outgrowth of its associated organs occurs. Liver formation can be …
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Caratterizzazione strutturale e funzionale dei sistemi emoglobinici di due specie di pesci (Mugil cephalus e Ophisurus serpens) e di due varianti emoglobiniche umane (HbRoma e HbF-SS-Monserrato)
… anodic Hbs may be involved in pumping O2 in the swim bladder in order to maintain the neutral buoyancy of the fish. The natural hemoglobin variants are very important to evaluate how an amino acid replacement could perturb the hemoglobin molecule and alter its function, whereas the comparative …
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Morphological, ethological and genomic discrimination of functional stocks of spotted grunter, an estuarine-dependent fish
… pharyngeal teeth, which are amplified by the swim bladder. These sounds are species specific in terms of a number of acoustic properties. With respect to turbidity, it was hypothesised that the acoustic properties of voicings or vocalisations of spotted grunter from turbid environments would …
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Development of broodstock conditioning-, induced spawning-, and hatchery methods for the South African spotted grunter (Pomadasys commersonnii)
… no cannibalism was observed. Inflation of the swim bladder was observed at five DPH, until termination of the rearing trial (seven DPH). The survival of larvae was low in all treatments, and this was attributed to culture contamination with an opportunistic and pathogenic microbial species …
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Instantaneous continental-shelf scale sensing of cod with Ocean Acoustic Waveguide Remote Sensing (OAWRS)
… were also measured from which we estimated the swimbladder resonance frequencies of local cod via a harmonic oscillator model that includes the effects of damping, the cod's swim bladder air volume at a given neutral buoyancy depth as well as changes to this volume for deviations from neutral …