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Relevant bibliographies by topics / Protopterus

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Dissertations / Theses
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Academic literature on the topic 'Protopterus'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Protopterus"

1

Onwuka, C. N., A. Francis, and F. D. Sikoki. "Length-weight relationship and condition factor of the African lungfish, Protopterus annectens (Owen, 1839) from Orashi and Sombreiro Rivers, Niger Delta, Nigeria." Journal of Aquatic Sciences 31, no. 2C (2017): 587–95. http://dx.doi.org/10.4314/jas.v31i2c.25.

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The length-weight relationship and condition factor of two hundred and seventy-one samples of Protopterus annectens (Owen, 1839) from Orashi and Sombreiro Rivers were investigated. The length-weight relationship calculated for the species gave an average “b” value of 1.0943 which is an indication of negative allometric growth. The fish attained an average length of 44.7 cm and weight of 150.2 g. The Condition factor varied from 0.10 to 0.19 with a mean of 0.15±0.02. This result showed that the rivers provide nourishable environment for the well-being of the fish.Keywords: Length-weight relationship, well-being, negative allometric, Protopterus annectens

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Patel, Monika, Fathima I. Iftikar, Richard W. Smith, Yuen K. Ip, and Chris M. Wood. "Water balance and renal function in two species of African lungfish Protopterus dolloi and Protopterus annectens." Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology 152, no. 2 (2009): 149–57. http://dx.doi.org/10.1016/j.cbpa.2008.09.014.

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Bemis, William E. "Convergent evolution of jaw-opening muscles in lepidosirenid lungfishes and tetrapods." Canadian Journal of Zoology 65, no. 11 (1987): 2814–17. http://dx.doi.org/10.1139/z87-425.

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Lepidosiren and Protopterus have a jaw-opening muscle which is topographically and functionally similar to the depressor mandibulae of salamanders. The similarity is so close that it poses the question whether the lepidosirenid jaw-opening system is homologous to that of tetrapods. New information presented here confirms that the muscle is absent in Neoceratodus forsteri, the living sister species of Lepidosiren and Protopterus, and paleontological evidence shows that the muscle was absent in phylogenetically primitive lungfishes. There are also developmental differences between the mandibular depressor of lepidosirenids and the depressor mandibulae of tetrapods. Based on this, I conclude that the mandibular depressor of lepidosirenids has evolved independently from the functionally equivalent muscle of amphibians.

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SUZUKI, Atsushi, and Kaoru YAMANAKA. "Chromosomes of an African lungfish, Protopterus annectens." Proceedings of the Japan Academy. Ser. B: Physical and Biological Sciences 64, no. 5 (1988): 119–21. http://dx.doi.org/10.2183/pjab.64.119.

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5

Chew, Shit F., and Kum Hiong. "Aestivation and brain of the African lungfish Protopterus annectens." Temperature 1, no. 2 (2014): 82–83. http://dx.doi.org/10.4161/temp.29650.

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Shinohara-Ohtani, Youko, and Yuichi Sasayama. "Unpaired Ultimobranchial Glands of the African Lungfish, Protopterus dolloi." Zoological Science 15, no. 4 (1998): 581–88. http://dx.doi.org/10.2108/0289-0003(1998)15[581:uugota]2.0.co;2.

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Shinohara-Ohtani, Youko, and Yuichi Sasayama. "Unpaired Ultimobranchial Glands of the African Lungfish, Protopterus dolloi." ZOOLOGICAL SCIENCE 15, no. 4 (1998): 581–88. http://dx.doi.org/10.2108/zsj.15.581.

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8

Filogonio, Renato, William Joyce, and Tobias Wang. "Nitrergic cardiovascular regulation in the African lungfish, Protopterus aethiopicus." Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology 207 (May 2017): 52–56. http://dx.doi.org/10.1016/j.cbpa.2016.12.030.

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GREENWOOD, P. H. "REPRODUCTION IN THE EAST AFRICAN LUNG-FISH PROTOPTERUS AETHIOPICUS HECKEL." Proceedings of the Zoological Society of London 130, no. 4 (2009): 547–67. http://dx.doi.org/10.1111/j.1096-3642.1958.tb00585.x.

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THOMSON, KEITH STEWART. "THE NASAL APPARATUS IN DIPNOI, WITH SPECIAL REFERENCE TO PROTOPTERUS." Proceedings of the Zoological Society of London 145, no. 2 (2009): 207–38. http://dx.doi.org/10.1111/j.1469-7998.1965.tb02015.x.

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Dissertations / Theses on the topic "Protopterus"

1

Seifert, Ashley W. "Respiratory allocation and the resting rate of metabolism in the African lungfish protopterus aethiopicus." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0004562.

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2

El, Attari Ahmed. "Etude du polymorphisme de la myosine chez l'anguille europeenne (anguilla anguilla l. ) et chez un dipneuste africain (protopterus annectens o. )." Paris 5, 1992. http://www.theses.fr/1992PA05S007.

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L'expression des differentes isoformes de la myosine a ete etudiee dans le muscle squelettique au cours de la croissance de l'anguille, et d'un dipneuste africain, le protoptere. Le muscle blanc de l'anguille sub-adulte est caracterise par la presence de trois isomyosines fm1, fm2 et fm3, associees aux trois chaines legeres rapides lc1f, lc2f et lc3f. Fm1, absente au stade vi-al, apparait progressivement aux stades ulterieurs en correlation avec l'augmentation de lc3f. Au stade vi-a1, deux chaines lourdes de type ii-1 et de type ii-2 sont detectees dans le myscle blanc. La chaine lourde de type ii-1 disparait et une troisieme chaine lourde de type ii-3 est observee des le stade vi-b, en meme temps de l'apparition des fibres acido-labiles. Chez le protoptere, l'etude du profil atpasique indique la presence d'un seul type de fibres larvaires dans le muscle axial de la larve, et de quatre types de fibres dans le myscle axial de l'adulte. L'analyse du contenu en isomyosines indique trois isoformes larvaires chez la larve, et des isoformes larvaires et rapides dans le muscle axial de l'adulte. Le muscle des filaments natatoires est compose majoritairement des isoformes rapides et d'une isoforme lente. Les isoformes larvaires, rapides et lente sont associees respectivement a une chaine lourde specifique, hcl, hcf et hcs. Les isoformes larvaires et rapides contiennent lc1f, lc2f et lc3f alors que l'isoforme lente contient lc1s et lc2s.

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HORNER, ANGELA. "THE EFFECTS OF VISCOSITY ON THE AXIAL MOTOR PATTERN AND KINEMATICS OF THE AFRICAN LUNGFISH (PROTOPTERUS ANNECTENS) DURING LATERAL UNDULATORY SWIMMING." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1141413377.

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4

Tostivint, Hervé. "Contribution à l'étude de l'évolution des gènes codant la somatostatine chez les vértébrés : mise en évidence chez les amphibiens et les dipneustes d'un nouveau variant de somatostatine muni d'un résidu proline en position deux." Rouen, 2000. http://www.theses.fr/2000ROUES033.

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La somatostatine est un peptide de 14 acides aminés (SS-14) qui, en tant que neuromédiateur ou neurohormone exerce de multiples effets, aussi bien dans le cerveau que dans les organes périphériques. Initialement isolée chez les mammifères, la SS-14 a ensuite été retrouvée, sans modification de séquence, dans tous les groupes de vertébrés. Divers variants de somatostatine, issus de gènes distincts, ont été par ailleurs mis en évidence chez plusieurs espèces de poissons. Toutefois, chez les tétrapodes, il était généralement admis qu'il n'existait qu'un seul gène de somatostatine. A l'occasion du présent travail, nous remettons en cause cette conception en montrant l'existence chez la grenouille Rana ridibunda de deux gènes distincts de somatostatine. Le premier code la SS-14 classique (SS1), tandis que le second code le variant [Pro2, Met13]SS-14 (SS2). Par ailleurs, nous mettons en évidence, chez le dipneuste Protopterus annectens, l'équivalent du gène SS2, qui code pour un nouveau variant de séquence [Pro2]SS-14. Le caractère orthologue des SS2 de grenouille et de dipneuste s'appuie sur les observations suivantes : I) la présence dans la séquence des deux peptides d'un résidu proline en position 2 ; II) un taux de similitude relativement élevé entre les séquences de leurs précurseurs ; III) une expression de leurs gènes presque exclusivement limitée au système nerveux central, contrairement aux gènes de type SS1 qui sont également exprimés dans le pancréas et le tractus gastro-intestinal. L'existence d'un gène SS2 à la fois chez les amphibiens et chez les dipneustes montre que la duplication dont ce gène est issu est antérieure à l'émergence des tétrapodes. De telles conclusions sont confortées par la présence, récemment établie, d'une PSS2 chez les téléostéens. Par ailleurs, la découverte chez les mammifères de la cortistatine, un nouveau peptide visiblement apparenté à la SS2, montre que le gène de la PSS2 existe probablement chez tous les ostéichthyens.

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Criswell, Katharine Elizabeth. "The comparative osteology and phylogenetic relationships of lepidosirenid lungfishes." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-05-3540.

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Lepidosirenidae is a clade of freshwater lungfishes that comprise the South American Lepidosiren paradoxa and four African species of the genus Protopterus. These two genera have been geographically separated since the Early Cretaceous break-up of Gondwana, but they share similar biology and skeletal morphology. The lepidosirenid species traditionally were distinguished by a combination of features such as head-to-body ratios, the number of pairs of vertebral ribs, and the presence or absence of external gills, but there are no published discrete skeletal characteristics and no published comparative studies including all extant species. I used High Resolution X-Ray Computed Tomography (CT), X-Ray photography, and alcohol-preserved, cleared-and-stained, and dry skeletal specimens from museum collections to describe the skeletal morphology of all species of lepidosirenid lungfishes in a comparative context. I digitally disarticulated the bones in each CT scan to compile a comprehensive comparative atlas of the cranial and pectoral elements of all extant lungfish. I discovered that the anocleithrum in Lepidosiren paradoxa, which was previously thought to be lacking, is actually present. I also identified skeletal differences between species in the frontoparietal, parasphenoid, supraorbital, and suboperculum. I incorporated those characters into the first morphological phylogenetic analysis to determine the interrelationships of the lepidosirenids. I also used previously published molecular sequence data from the ribosomal RNA gene 16s to run combined morphological and molecular phylogenetic analyses. To generate phylogenetic hypotheses using different types of data and different methods of determining phylogeny, I employed the maximum parsimony, maximum likelihood, and Bayesian inference methods. Lepidosirenidae is monophyletic in almost all analyses, Protopterus is monophyletic in each analysis, and Protopterus annectens and Protopterus aethiopicus are sister taxa in every analysis. The phylogenetic positions of Protopterus dolloi and Protopterus amphibius are incongruent in many of the analyses, which indicates that further examination of the skeletal variation and addition of molecular sequences of different genes is needed. Based on the comparative morphological atlas and the phylogenetic analyses, questions of lepidosirenid biogeography, morphological variation within lungfish, and better identification of lungfish fossils can now be investigated in a more rigorous context.<br>text

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6

Mlewa, Chrisestom Mwatete. "Biology of the African lungfish Protopterus aethiopicus Heckel 1851, and some aspects of its fishery in Lake Baringo, Kenya /." 2003.

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Book chapters on the topic "Protopterus"

1

"Hearing in the African Lungfi sh, Protopterus annectens." In The Biology of Lungfishes. CRC Press, 2016. http://dx.doi.org/10.1201/b10357-24.

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2

Icardo, José. "The Gut and Associated Organs in the African Lungfish Protopterus annectens." In Phylogeny, Anatomy and Physiology of Ancient Fishes. CRC Press, 2015. http://dx.doi.org/10.1201/b18798-11.

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