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Dissertations / Theses on the topic 'Clariidae'

Author: Grafiati
Published: 4 June 2021
Last updated: 26 July 2025

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1

Bevan, David J. (David John). "The effect of dissolved oxygen and water depth on the respiratory behaviour and growth of Clarias macrocephalus (Pisces, Clariidae) /." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65506.

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2

Palhares, Gerson Lopes. "Sistema porta hepático do bagre africano Clarias gariepinus Burchell, 1822 (Clariidae, Siluriformes, Ostariophysii)." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/10/10132/tde-17102006-112001/.

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Estudou-se o sistema porta hepático do bagre africano Clarias gariepinus Burchell, 1822, sob o ponto de vista da anatomia macroscópica e microscópica, utilizando-se várias técnicas anatômicas, que envolveram anestesia, injeção de substâncias recomendadas ao estudo do sistema vascular (látex, nanquim, cloreto de polivinil e substância radiopaca), dissecação, corrosão ou radiografia, conforme a exigência de cada técnica, como meio de compreensão da anatomia vascular do fígado deste peixe. Foram utilizados 16 exemplares do sexo feminino, com comprimento total entre 45 e 53,5 centímetros e massa c
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3

Britz, P. J. (Peter Jacobus) 1959. "Environmental requirements for the hatchery rearing of African catfish Clarias Gariepinus (Pisces: Clariidae) larvae and juveniles." Thesis, Rhodes University, 1988. http://hdl.handle.net/10962/d1001964.

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Inadequate seed production has historically been a factor limiting the commercial culture of Clarias gariepinus. The need to determine the environmental requirements of larvae was identified, in order to facilitate their successful mass rearing in hatcheries. The effects of key environmental factors on the growth, survival and aspects of the behaviour of C. gariepinus larvae and juveniles were investigated under controlled conditions. A strong emphasis was placed on the interpretation of the observed responses in terms of the natural history of the animal. Larvae were obtained by artificially
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4

Uys, Wynand. "Aspects of the nutritional physiology and dietary requirements of juvenile and adult sharptooth catfish, Clarias Gariepinus (Pisces : clariidae)." Thesis, Rhodes University, 1990. http://hdl.handle.net/10962/d1005068.

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Past and current research on the biology and culture of the sharptooth catfish (Clarias gariepinus) has stimulated the development of its commercial production. At the inception of this project in 1985, it was decided that the development of an optimal dry feed was the most important step in developing a more complete culture technology for the species. The objectives of the project were, therefore, to investigate aspects of the nutritional physiology and dietary requirements of the species to provide the necessary information for the formulation of optimum economical feeds. A review of the na
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5

Oellermann, Lawrence Keith. "A comparison of the aquaculture potential of Clarias gariepinus (Burchell, 1822) and its hybrid with Heterobranchus longifilis valenciennes, 1840 in Southern Africa." Thesis, Rhodes University, 1996. http://hdl.handle.net/10962/d1005089.

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The aim of this study was to evaluate the aquaculture potential of a hybrid between the two largest African silurid catfish, Heterobranchus longifilis (HL) and Clarias gariepinus (CG) . A morphometric, meristic and karyological study showed that the hybrid shared some of the physical characteristics of both C. gariepinus and H. longifilis, while its chromosome complement and fundamental number (2N = 54, FN = 95), was intermediate between that of H. longifilis (2N = 52, FN = 92) and C. gariepinus (2N = 56, FN = 97). The HLxCG cross could therefore be regarded as a true hybrid. For the character
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6

Hanika, Susanne [Verfasser], and Bernd [Akademischer Betreuer] Kramer. "Elektrosensorische Beutedetektion beim Afrikanischen Scharfzahnwels Clarias gariepinus (Burchell, 1822; Clariidae, Siluriformes, Teleostei) / Susanne Hanika. Betreuer: Bernd Kramer." Regensburg : Universitätsbibliothek Regensburg, 1997. http://d-nb.info/1026527147/34.

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7

Rouhani, Q. A. "Digestible energy as a criterion for the development of diets for the African sharptooth catfish, Clarias gariepinus (Pisces: Clariidae)." Thesis, Rhodes University, 1993. http://hdl.handle.net/10962/d1005103.

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Based on a number of attributes, the African sharptooth catfish, Clarias gariepinus is an ideal aquaculture species. Much work has been undertaken on developing the technology for the commercial culture of the species inclusive of determining the nutritional requirements for cost effective feed formulation. However, digestible energy (DE) values for specific feed ingredients were unknown. As DE values are not interchangeable between species, this study set out to determine the DE values for conventional and unconventional feed-ingredients for the formulation of an optimal feed. The ultimate go
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8

KERDCHUEN, NANTHAWAT. "L'alimentation artificielle d'un silure africain, heterobranchus longifilis (teleostei : clariidae): incidence du mode d'alimentation et premiere estimation des besoins nutritionnels." Paris 6, 1992. http://www.theses.fr/1992PA066196.

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Les conditions optimales d'alimentation et les besoins nutritionnels d'un silure africain, heterobranchus longifilis (teleostei: clariidae), correspondant aux differents stades de l'elevage ont ete etudies. Les essais comparatifs de l'alimentation larvaire ont montre que l'utilisation des proies planctoniques (moina, notamment) ou d'un aliment compose a base de levure et de foie de buf comme aliment de depart permet d'obtenir une survie aussi elevee qu'avec l'artemia, mais avec une croissance plus faible au cours des deux premieres semaines d'elevage. Une amelioration de la croissance est obse
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9

Belão, Thiago de Campos. "Respostas cardiorrespiratórias do teleósteo de respiração aérea, Clarias gariepinus, exposto à hipóxia gradual." Universidade Federal de São Carlos, 2010. https://repositorio.ufscar.br/handle/ufscar/1325.

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Made available in DSpace on 2016-06-02T19:22:53Z (GMT). No. of bitstreams: 1 3162.pdf: 1363154 bytes, checksum: 725b7e9d57697bbcc0ab7a78df25145a (MD5) Previous issue date: 2010-06-25<br>Financiadora de Estudos e Projetos<br>Air-breathing fish are classified as obligatory (when breathing obligatory atmospheric air independently of the water O2 tension) or facultative air-breather (using an air breathing organ ABO -, when theirs gills are not able to extract all O2 necessary to maintain the aerobic mechanisms under hypoxic conditions). The catfish, Clarias gariepinus, is airbreathing fish th
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10

Anseaume, Lemuel. "Contribution à la systématique des Clariidae (Teleostei ; Siluriformes) : révision des genres Dinotopterus Boulenger, 1906, et Bathyclarias Jackson, 1959, endémiques des grands lacs africains." Paris, Muséum national d'histoire naturelle, 2007. http://www.theses.fr/2007MNHN0017.

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Nous proposons une révision, générique et spécifique, des genres de Clariidae Africains Dinotopterus BOULENGER, 1906, endémique du lac Tanganyika, et Bathyclarias JACKSON, 1959, endémique du lac Malawi, déclarés synonymes (Greenwood, 1961). A partir de critères morphométriques, méristiques, ostéologiques et morphologiques, relevés sur 462 spécimens des collections des NHM (GB), MRAC (Belgique), SAIAB (Afrique du Sud) et CU (USA), nos résultats présents confirment un premier travail, de rang générique (Anseaume &amp; Teugels, 1999), conduisant à rejeter la synonymie entre les deux genres et à d
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11

"Sistema porta hepático do bagre africano Clarias gariepinus Burchell, 1822 (Clariidae, Siluriformes, Ostariophysii)." Tese, Biblioteca Digital de Teses e Dissertações da USP, 2004. http://www.teses.usp.br/teses/disponiveis/10/10132/tde-17102006-112001/.

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12

"Die ontogenie en morfologie van die visserale kopspiere van Clarias gariepinus (Burchell) (Clariidae)." Thesis, 2014. http://hdl.handle.net/10210/12769.

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13

PROKEŠOVÁ, Markéta. "Vliv teploty vody a intenzity světla na raný vývoj sumečka afrického v komerčním chovu." Doctoral thesis, 2016. http://www.nusl.cz/ntk/nusl-260866.

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The successful production of quality early fish stages is crucial for artificial rearing fish species. Nevertheless, it is quite a problematic process, because fish as poikilothermic organisms are highly sensitive to various environmental conditions. Moreover, both fish embryos and larvae are more affected by biotic and abiotic factors (such as predation, stocking density, temperature, light, pH, salinity, oxygen saturation, feeding availability, or their interactions) than older juveniles or adults. Most fish processes such as reproduction, metabolism, survival, development and growth can be
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14

PROKEŠOVÁ, Markéta. "Vliv teploty vody na průběh rané ontogeneze u keříčkovce červenolemého (Clarias gariepinus)." Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-136495.

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In the present M. Sc. thesis the effect of water temperature (thermal range: 17.4 - 38.6 °C) on early life history (during interval from egg fertilization to full yolk sac depletion by 50 % of larvae; Fe - Re50) in African catfish (Clarias gariepinus) was examined. Length of the incubation period (i. e. interval from egg fertilization to the moment of hatching of 50 % of individuals; Fe - H50), length of the hatching period (i. e. interval from hatching of 5 % of individuals to hatching of 95 % of individuals; H5 - H95), length of the period up to the first intake of exogenous food (i. e. inte
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15

Van, der Merwe Marinda. "Aspects of heavy metal concentration in the Olifants River, Kruger National Park and the effect of copper on the haematology of Clarias gariepinus (Clariidae)." Thesis, 2014. http://hdl.handle.net/10210/9327.

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M.Sc. (Zoology)<br>The necessity to maintain high water quality standards has become essential not only to man, but also to conserve aquatic life forms. The Olifants, Selati and Letaba Rivers were monitored for water quality variables and metal concentration in water, sediments and muscle, gill, fat, gonads, liver, bile, blood and kidney of the sharp tooth catfish, C. qariepinus. Some of the water quality variables measured were not within the limits of those standards set for the protection of fish and other aquatic life forms. Turbidity seems to be the biggest problem, due to the Phalaborwa
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