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Morphometric recognition of two morphs in sterlet (Acipenser ruthenus) population induced by different reproductive behaviour

Identifieur interne : 004B26 ( Istex/Curation ); précédent : 004B25; suivant : 004B27

Morphometric recognition of two morphs in sterlet (Acipenser ruthenus) population induced by different reproductive behaviour

Auteurs : M. Lenhardt [Yougoslavie] ; P. Cakic [Yougoslavie] ; J. Kolarevic [Yougoslavie] ; Z. Gacic [Yougoslavie]

Source :

RBID : ISTEX:96CE3845E61421FD06821B58AC3DF4190D927586

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English descriptors

Abstract

Four species of sturgeons appear in the Yugoslav part of the Danube River. Among them three are anadromous, beluga (Huso huso), Russian sturgeon (Acipenser gueldenstaedtii) and stellate sturgeon (Acipenser stellatus) and migrate to Danube from the Black Sea to spawn. Only sterlet (Acipenser ruthenus) is exclusively freshwater. There are obvious differences between vernal and winter races of anadromous sturgeons, due to their different migratory patterns. Russian ichthyologist Berg (1934) claimed that there are two races (morphs) in the starlet population as well. This stimulated long discussion in Russian and Yugoslav literature, and it was the starting point for our research on sterlet in the Yugoslav part of the Danube River. Morphometric analysis was preformed on 159 individuals caught in Danube River among 1123 and 1173 km, on four localities during September and October 2002. Analysis included 24 morphological and 3 meristic characters. K‐means cluster analysis indicated existence of two different clusters (groups), one with 95 (59·75%) and other with 64 (40·25%) samples. Significant differences were found for preorbital, preoral and prebarbel length. Mean values (in % of head length) for first group were 50·13 ± 1·71, 57·61 ± 1·87, 39·74 ± 2·20 and for second group 53·50 ± 2·46, 62·07 ± 2·20 and 43·30 ± 2·08 respectively. Findings were confirmed by Principal Components & Classification Analysis. These results speak in favour of existence of two morphs in sterlet population, one with long and pointed rostrum (vernal) and other with short rostrum (winter). According to the literature that is probably influenced by different reproductive behaviour (time separation in spawning).

Url:
DOI: 10.1111/j.1095-8649.2003.216bf.x

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ISTEX:96CE3845E61421FD06821B58AC3DF4190D927586

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<term>Freshwater</term>
<term>Freshwater laboratory</term>
<term>Freshwater mussels</term>
<term>Functional response</term>
<term>Future studies</term>
<term>Gadus morhua</term>
<term>Gasterosteus</term>
<term>Gasterosteus aculeatus</term>
<term>Genetic basis</term>
<term>Genetic differences</term>
<term>Gill chamber</term>
<term>Girardinichthys multiradiatus</term>
<term>Goby</term>
<term>Greater numbers</term>
<term>Growth rate</term>
<term>Guppy</term>
<term>Habitat</term>
<term>Habitat choice</term>
<term>Habitat preference</term>
<term>Hatchery</term>
<term>Hatchery fish</term>
<term>Helsinki</term>
<term>Homing behaviour</term>
<term>Honest signal</term>
<term>Host behaviour change</term>
<term>Important fish species</term>
<term>Individual differences</term>
<term>Individual fish</term>
<term>Internal fertilization</term>
<term>Intraspecific variability</term>
<term>Isle</term>
<term>Juvenile atlantic salmon</term>
<term>Juvenile sticklebacks</term>
<term>Karlskrona archipelago</term>
<term>Knipowitschia panizzae</term>
<term>Kyoto japan</term>
<term>Kyoto university</term>
<term>Laboratory experiments</term>
<term>Laboratory studies</term>
<term>Lake tana</term>
<term>Large males</term>
<term>Larger males</term>
<term>Larval dispersal</term>
<term>Late afternoon</term>
<term>Leeds</term>
<term>Life cycle</term>
<term>Light environments</term>
<term>Light intensities</term>
<term>Light intensity</term>
<term>Littoral zone</term>
<term>Louis compton miall building</term>
<term>Lowestoft</term>
<term>Lowestoft laboratory</term>
<term>Main building</term>
<term>Male</term>
<term>Male competition</term>
<term>Male mating success</term>
<term>Male sticklebacks</term>
<term>Marine biology</term>
<term>Marine ecology</term>
<term>Marine science</term>
<term>Marine species</term>
<term>Mating success</term>
<term>Mating system</term>
<term>Mating systems</term>
<term>Migratory behaviour</term>
<term>Model species</term>
<term>Model system</term>
<term>Mosquito fish</term>
<term>Mussel</term>
<term>Natural populations</term>
<term>Natural resources</term>
<term>Neighbour</term>
<term>Nemachilus angorae</term>
<term>Nest opening</term>
<term>Network theory</term>
<term>Nocturnal foraging excursions</term>
<term>Normal distribution model</term>
<term>Normal stickleback males</term>
<term>Norwich</term>
<term>Nova scotia</term>
<term>Olfactory</term>
<term>Olfactory cues</term>
<term>Olfactory sensitivity</term>
<term>Original group</term>
<term>Other fish families</term>
<term>Other guppies</term>
<term>Other hand</term>
<term>Oviposition</term>
<term>Oviposition choices</term>
<term>Oviposition decisions</term>
<term>Oxygen levels</term>
<term>Pakefield road</term>
<term>Paper abstracts</term>
<term>Parablennius tentacularis</term>
<term>Paralichthys olivaceus</term>
<term>Parasite</term>
<term>Parasitic</term>
<term>Park place</term>
<term>Parr</term>
<term>Physiological condition</term>
<term>Piscivorous barbus</term>
<term>Plaice</term>
<term>Poecilia reticulata</term>
<term>Pool habitat</term>
<term>Population biology</term>
<term>Population densities</term>
<term>Population differences</term>
<term>Population dynamics</term>
<term>Population structure</term>
<term>Predation</term>
<term>Predator</term>
<term>Predator attack</term>
<term>Predator inspection</term>
<term>Predator inspection behaviour</term>
<term>Present data</term>
<term>Present study</term>
<term>Prey</term>
<term>Prey selection</term>
<term>Prey size</term>
<term>Putative prey</term>
<term>Queen mary</term>
<term>Recent work</term>
<term>Reproductive</term>
<term>Reproductive behaviour</term>
<term>Reproductive success</term>
<term>Resource competition</term>
<term>Results show</term>
<term>Rhodeus sericeus</term>
<term>River discharge</term>
<term>Salmo salar</term>
<term>Salmo trutta</term>
<term>Salmon</term>
<term>Salmon parr</term>
<term>Salmonid</term>
<term>Same time</term>
<term>Secondary males</term>
<term>Several species</term>
<term>Sexual selection</term>
<term>Shallow waters</term>
<term>Shoal</term>
<term>Shoaling</term>
<term>Shoaling behaviour</term>
<term>Shoaling tendency</term>
<term>Significant differences</term>
<term>Single males</term>
<term>Small groups</term>
<term>Sneaker males</term>
<term>Social behaviour</term>
<term>Social interactions</term>
<term>Social networks</term>
<term>Southern population</term>
<term>Species ranges</term>
<term>Sperm</term>
<term>Sperm cloud</term>
<term>Sperm competition</term>
<term>Sperm competition dynamics</term>
<term>Sperm expenditure</term>
<term>Sponge substrata</term>
<term>Stickleback</term>
<term>Stickleback gasterosteus aculeatus</term>
<term>Stream transport</term>
<term>Substrate embeddedness</term>
<term>Succursale centre ville</term>
<term>Testis</term>
<term>Tidal</term>
<term>Tidal streams</term>
<term>Trait</term>
<term>Transport mechanism</term>
<term>Trout</term>
<term>Turbot</term>
<term>Unfamiliar fish</term>
<term>Unfamiliar groups</term>
<term>Unknown individuals</term>
<term>Vertebrate</term>
<term>Vertebrate models</term>
<term>Vertebrate zoology</term>
<term>Visual cues</term>
<term>Visual isolation</term>
<term>Wageningen institute</term>
<term>Wales aberystwyth</term>
<term>Water flow rate</term>
<term>Water temperature</term>
<term>Water velocity</term>
<term>Wavelength spectrum</term>
<term>West mains road</term>
<term>Western australia</term>
<term>Wide range</term>
<term>Wild populations</term>
<term>Yellow stingray</term>
<term>Yellowfin shiner</term>
<term>Yugoslav part</term>
<term>Zoology</term>
<term>Zooplankton</term>
<term>Zooplankton density</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr">
<term>Aquiculture</term>
<term>Biologie</term>
<term>écologie</term>
<term>Poisson</term>
<term>Ressource alimentaire</term>
<term>Eau douce</term>
<term>Habitat</term>
<term>Ressource naturelle</term>
<term>Dynamique de la population</term>
<term>Comportement social</term>
<term>Zoologie</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front>
<div type="abstract" xml:lang="en">Four species of sturgeons appear in the Yugoslav part of the Danube River. Among them three are anadromous, beluga (Huso huso), Russian sturgeon (Acipenser gueldenstaedtii) and stellate sturgeon (Acipenser stellatus) and migrate to Danube from the Black Sea to spawn. Only sterlet (Acipenser ruthenus) is exclusively freshwater. There are obvious differences between vernal and winter races of anadromous sturgeons, due to their different migratory patterns. Russian ichthyologist Berg (1934) claimed that there are two races (morphs) in the starlet population as well. This stimulated long discussion in Russian and Yugoslav literature, and it was the starting point for our research on sterlet in the Yugoslav part of the Danube River. Morphometric analysis was preformed on 159 individuals caught in Danube River among 1123 and 1173 km, on four localities during September and October 2002. Analysis included 24 morphological and 3 meristic characters. K‐means cluster analysis indicated existence of two different clusters (groups), one with 95 (59·75%) and other with 64 (40·25%) samples. Significant differences were found for preorbital, preoral and prebarbel length. Mean values (in % of head length) for first group were 50·13 ± 1·71, 57·61 ± 1·87, 39·74 ± 2·20 and for second group 53·50 ± 2·46, 62·07 ± 2·20 and 43·30 ± 2·08 respectively. Findings were confirmed by Principal Components & Classification Analysis. These results speak in favour of existence of two morphs in sterlet population, one with long and pointed rostrum (vernal) and other with short rostrum (winter). According to the literature that is probably influenced by different reproductive behaviour (time separation in spawning).</div>
</front>
</TEI>
</record>

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