The genus Xenoclarias (Pisces, Siluriformes) in Lake Victoria, with a redescription of Xenoclarias eupogon and notes on the biology of the species
Identifieur interne : 00E245 ( Main/Exploration ); précédent : 00E244; suivant : 00E246The genus Xenoclarias (Pisces, Siluriformes) in Lake Victoria, with a redescription of Xenoclarias eupogon and notes on the biology of the species
Auteurs : J. M. Gee [Ouganda]Source :
- Journal of Zoology [ 0952-8369 ] ; 1975-02.
English descriptors
- KwdEn :
- Accidental ingestion, Allometric variation, Anterior margin, Bagrus docmac, Barbel, Branchiostegal membrane, Caudal, Centrum, Chaoborus larvae, Chironomid, Chironomid larvae, Clarias, Clarias eupogon, Clarias lazera, Commercial fishery, Complex centrum, Considerable difference, Corbet, Cordonne wetherall, Crescentic process, Deep water, Deep water samples, Deeper water, Depth range, Depth zone, Diagrammatic sketch, Dipteran pupae, Dorsal, Dorsal view, East africa, East african, Eastern part, Eupogon, Fish scales, Fisheries research organization, Food types, Further specimens, Genus, Genus xenoclarias, Gill, Greenwood, Head length, High numbers, Holobranchus, Hyaline distally, Hypurals, Inner mandibular barbels, Kavirondo gulf, Lake victoria, Large number, Large sample, Larva, Length classes, Length ratio, Lunar periodicity, Lundberg baskin, Main lake, Mandibular, Maxillary, Maxillary barbels, Minor importance, Morphometric, Morphometric characters, Mouth width, Nasal barbels, Neural arch, Normal distribution, Occipital process, Outer mandibular barbels, Pectoral, Pectoral spine, Pelvic fins, Percentage occurrence figures, Posterior part, Premaxillary tooth band, Present data, Principal rays, Rocky shores, Shallow water, Shallow water samples, Significant element, Sigulu island, Single specimen, Size groups, Small clariid, Solid shading, Standard length, Stomach contents, Suprabranchial, Suprabranchial cavity, Suprabranchial chamber, Swimbladder, Swimbladder capsule, Swimbladder lumen, Times head length, Times length, Transverse duct, Trawl, Tunica externa, Type specimens, Ukerewe island, Victoria, Vomerine tooth bands, Weberian apparatus, Xenoclarias, Xenoclarias eupogon, Xenoclurius eupogon.
- Teeft :
- Accidental ingestion, Allometric variation, Anterior margin, Bagrus docmac, Barbel, Branchiostegal membrane, Caudal, Centrum, Chaoborus larvae, Chironomid, Chironomid larvae, Clarias, Clarias eupogon, Clarias lazera, Commercial fishery, Complex centrum, Considerable difference, Corbet, Cordonne wetherall, Crescentic process, Deep water, Deep water samples, Deeper water, Depth range, Depth zone, Diagrammatic sketch, Dipteran pupae, Dorsal, Dorsal view, East africa, East african, Eastern part, Eupogon, Fish scales, Fisheries research organization, Food types, Further specimens, Genus, Genus xenoclarias, Gill, Greenwood, Head length, High numbers, Holobranchus, Hyaline distally, Hypurals, Inner mandibular barbels, Kavirondo gulf, Lake victoria, Large number, Large sample, Larva, Length classes, Length ratio, Lunar periodicity, Lundberg baskin, Main lake, Mandibular, Maxillary, Maxillary barbels, Minor importance, Morphometric, Morphometric characters, Mouth width, Nasal barbels, Neural arch, Normal distribution, Occipital process, Outer mandibular barbels, Pectoral, Pectoral spine, Pelvic fins, Percentage occurrence figures, Posterior part, Premaxillary tooth band, Present data, Principal rays, Rocky shores, Shallow water, Shallow water samples, Significant element, Sigulu island, Single specimen, Size groups, Small clariid, Solid shading, Standard length, Stomach contents, Suprabranchial, Suprabranchial cavity, Suprabranchial chamber, Swimbladder, Swimbladder capsule, Swimbladder lumen, Times head length, Times length, Transverse duct, Trawl, Tunica externa, Type specimens, Ukerewe island, Victoria, Vomerine tooth bands, Weberian apparatus, Xenoclarias, Xenoclarias eupogon, Xenoclurius eupogon.
Abstract
The acquisition of large collections of the catfish Xenoclarias Greenwood from Lake Victoria, East Africa, demonstrated a need for a reappraisal of the taxonomy of the genus. It is suggested that only one species, Xenoclarias eupogon (Norman) is found in the lake but that it is very variable in many of its morphometric characters. The species is redescribed from data obtained for 72 fishes from various localities and depths in the lake. Observations of the food of the fish show it to be almost entirely insectivorous with a preference for Chironomidae over Chaoboridae larvae. Evidence is also put forward to support the view that X. eupogon breeds on or close to rocky shores.
Url:
DOI: 10.1111/j.1469-7998.1975.tb01396.x
Affiliations:
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Le document en format XML
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<sourceDesc><biblStruct><analytic><title level="a" type="main">The genus <hi rend="italic">Xenoclarias</hi>
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and notes on the biology of the species</title>
<author><name sortKey="Gee, J M" sort="Gee, J M" uniqKey="Gee J" first="J. M." last="Gee">J. M. Gee</name>
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<series><title level="j" type="main">Journal of Zoology</title>
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<term>Allometric variation</term>
<term>Anterior margin</term>
<term>Bagrus docmac</term>
<term>Barbel</term>
<term>Branchiostegal membrane</term>
<term>Caudal</term>
<term>Centrum</term>
<term>Chaoborus larvae</term>
<term>Chironomid</term>
<term>Chironomid larvae</term>
<term>Clarias</term>
<term>Clarias eupogon</term>
<term>Clarias lazera</term>
<term>Commercial fishery</term>
<term>Complex centrum</term>
<term>Considerable difference</term>
<term>Corbet</term>
<term>Cordonne wetherall</term>
<term>Crescentic process</term>
<term>Deep water</term>
<term>Deep water samples</term>
<term>Deeper water</term>
<term>Depth range</term>
<term>Depth zone</term>
<term>Diagrammatic sketch</term>
<term>Dipteran pupae</term>
<term>Dorsal</term>
<term>Dorsal view</term>
<term>East africa</term>
<term>East african</term>
<term>Eastern part</term>
<term>Eupogon</term>
<term>Fish scales</term>
<term>Fisheries research organization</term>
<term>Food types</term>
<term>Further specimens</term>
<term>Genus</term>
<term>Genus xenoclarias</term>
<term>Gill</term>
<term>Greenwood</term>
<term>Head length</term>
<term>High numbers</term>
<term>Holobranchus</term>
<term>Hyaline distally</term>
<term>Hypurals</term>
<term>Inner mandibular barbels</term>
<term>Kavirondo gulf</term>
<term>Lake victoria</term>
<term>Large number</term>
<term>Large sample</term>
<term>Larva</term>
<term>Length classes</term>
<term>Length ratio</term>
<term>Lunar periodicity</term>
<term>Lundberg baskin</term>
<term>Main lake</term>
<term>Mandibular</term>
<term>Maxillary</term>
<term>Maxillary barbels</term>
<term>Minor importance</term>
<term>Morphometric</term>
<term>Morphometric characters</term>
<term>Mouth width</term>
<term>Nasal barbels</term>
<term>Neural arch</term>
<term>Normal distribution</term>
<term>Occipital process</term>
<term>Outer mandibular barbels</term>
<term>Pectoral</term>
<term>Pectoral spine</term>
<term>Pelvic fins</term>
<term>Percentage occurrence figures</term>
<term>Posterior part</term>
<term>Premaxillary tooth band</term>
<term>Present data</term>
<term>Principal rays</term>
<term>Rocky shores</term>
<term>Shallow water</term>
<term>Shallow water samples</term>
<term>Significant element</term>
<term>Sigulu island</term>
<term>Single specimen</term>
<term>Size groups</term>
<term>Small clariid</term>
<term>Solid shading</term>
<term>Standard length</term>
<term>Stomach contents</term>
<term>Suprabranchial</term>
<term>Suprabranchial cavity</term>
<term>Suprabranchial chamber</term>
<term>Swimbladder</term>
<term>Swimbladder capsule</term>
<term>Swimbladder lumen</term>
<term>Times head length</term>
<term>Times length</term>
<term>Transverse duct</term>
<term>Trawl</term>
<term>Tunica externa</term>
<term>Type specimens</term>
<term>Ukerewe island</term>
<term>Victoria</term>
<term>Vomerine tooth bands</term>
<term>Weberian apparatus</term>
<term>Xenoclarias</term>
<term>Xenoclarias eupogon</term>
<term>Xenoclurius eupogon</term>
</keywords>
<keywords scheme="Teeft" xml:lang="en"><term>Accidental ingestion</term>
<term>Allometric variation</term>
<term>Anterior margin</term>
<term>Bagrus docmac</term>
<term>Barbel</term>
<term>Branchiostegal membrane</term>
<term>Caudal</term>
<term>Centrum</term>
<term>Chaoborus larvae</term>
<term>Chironomid</term>
<term>Chironomid larvae</term>
<term>Clarias</term>
<term>Clarias eupogon</term>
<term>Clarias lazera</term>
<term>Commercial fishery</term>
<term>Complex centrum</term>
<term>Considerable difference</term>
<term>Corbet</term>
<term>Cordonne wetherall</term>
<term>Crescentic process</term>
<term>Deep water</term>
<term>Deep water samples</term>
<term>Deeper water</term>
<term>Depth range</term>
<term>Depth zone</term>
<term>Diagrammatic sketch</term>
<term>Dipteran pupae</term>
<term>Dorsal</term>
<term>Dorsal view</term>
<term>East africa</term>
<term>East african</term>
<term>Eastern part</term>
<term>Eupogon</term>
<term>Fish scales</term>
<term>Fisheries research organization</term>
<term>Food types</term>
<term>Further specimens</term>
<term>Genus</term>
<term>Genus xenoclarias</term>
<term>Gill</term>
<term>Greenwood</term>
<term>Head length</term>
<term>High numbers</term>
<term>Holobranchus</term>
<term>Hyaline distally</term>
<term>Hypurals</term>
<term>Inner mandibular barbels</term>
<term>Kavirondo gulf</term>
<term>Lake victoria</term>
<term>Large number</term>
<term>Large sample</term>
<term>Larva</term>
<term>Length classes</term>
<term>Length ratio</term>
<term>Lunar periodicity</term>
<term>Lundberg baskin</term>
<term>Main lake</term>
<term>Mandibular</term>
<term>Maxillary</term>
<term>Maxillary barbels</term>
<term>Minor importance</term>
<term>Morphometric</term>
<term>Morphometric characters</term>
<term>Mouth width</term>
<term>Nasal barbels</term>
<term>Neural arch</term>
<term>Normal distribution</term>
<term>Occipital process</term>
<term>Outer mandibular barbels</term>
<term>Pectoral</term>
<term>Pectoral spine</term>
<term>Pelvic fins</term>
<term>Percentage occurrence figures</term>
<term>Posterior part</term>
<term>Premaxillary tooth band</term>
<term>Present data</term>
<term>Principal rays</term>
<term>Rocky shores</term>
<term>Shallow water</term>
<term>Shallow water samples</term>
<term>Significant element</term>
<term>Sigulu island</term>
<term>Single specimen</term>
<term>Size groups</term>
<term>Small clariid</term>
<term>Solid shading</term>
<term>Standard length</term>
<term>Stomach contents</term>
<term>Suprabranchial</term>
<term>Suprabranchial cavity</term>
<term>Suprabranchial chamber</term>
<term>Swimbladder</term>
<term>Swimbladder capsule</term>
<term>Swimbladder lumen</term>
<term>Times head length</term>
<term>Times length</term>
<term>Transverse duct</term>
<term>Trawl</term>
<term>Tunica externa</term>
<term>Type specimens</term>
<term>Ukerewe island</term>
<term>Victoria</term>
<term>Vomerine tooth bands</term>
<term>Weberian apparatus</term>
<term>Xenoclarias</term>
<term>Xenoclarias eupogon</term>
<term>Xenoclurius eupogon</term>
</keywords>
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<front><div type="abstract" xml:lang="en">The acquisition of large collections of the catfish Xenoclarias Greenwood from Lake Victoria, East Africa, demonstrated a need for a reappraisal of the taxonomy of the genus. It is suggested that only one species, Xenoclarias eupogon (Norman) is found in the lake but that it is very variable in many of its morphometric characters. The species is redescribed from data obtained for 72 fishes from various localities and depths in the lake. Observations of the food of the fish show it to be almost entirely insectivorous with a preference for Chironomidae over Chaoboridae larvae. Evidence is also put forward to support the view that X. eupogon breeds on or close to rocky shores.</div>
</front>
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<affiliations><list><country><li>Ouganda</li>
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