perca fluviatilis - dbsm .pdf/percaflu.pdfhabitat slow flowing rivers, deep lakes and ponds, but...

Perca fluviatilis

Foto: Pietro Ceccuzzi

Taxonomy (from NCBI)Kingdom: Animalia

Phylum: ChordataSubphylum: Vertebrata

Superclass: Osteichthyes -- bony fishes, Class: Actinopterygii spiny rayed fishes

Subclass: Neopterygii -- neopterygiansInfraclass: Teleostei

Superorder: AcanthopterygiiOrder: Perciformes

Suborder: PercoideiFamily: Percidae

Genus: Perca Linnaeus, 1758 -- yellow perchesSpecies: Perca fluviatilis Linnaeus, 1758

http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&id=8168&lvl=3&p=mapview&p=has_linkout&p=blast_url&p=genome_blast&lin=f&keep=1&srchmode=1&unlock

http://www.itis.usda.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=202423














Morphological featuresMax. length: 51.0 cm; Max. weight: 4,5 g; Max. reported age: 22 years.

Morphology: Greenish-yellow body with scales, with 5-9 darker transversal bands on sides. Rayed spines: 14-20 dorsal, with 13-16 soft rays; 7-10 anal soft rays. The first dorsal fin is gray and greater, second dorsal and pectoral yellow, others fins reddish. Skeleton with 39-42 vertebrae.

2 cm


HabitatSlow flowing rivers, deep lakes and ponds, but also common in the Baltic Sea. Usually found near submersed obstacles. Temperature: 10 – 22°C.

The Baltic sea near Stockholm

Foto: A.G. Cattaneo

Lago Maggiore near Varese, Italy F oto

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Geographical distribution: Europe and Siberia (native). Originally absent in Italy, Spain, Greece and Great Britain, hasbeen successfully introduced since XVIII century (from 1860 in Italy). Largely cultured for commercial purposals also in the Southern hemisphere (Australia).

Feeding and BehaviourPredator: • Larval stage: zooplankton.• Juvenile and adult life: zooplankton, zoobenthos and nekton.

Can be predated by Anguilla anguilla, Sander lucioperca and other fishes.

Swimming type: carangiform, by movements of body and of the caudal fin. Speed: 0,5-1 m/h.

Reproduction

Southern hemisphere).Eggs: in jelly matrix and in ribbons 1 m long and bound to a substratum.

Reproduction: dioecism, external fertilization, polyandria.Spawning: in open waters, once a year in spring (autumn in the


Early development: fertilized eggs


Eggs: white,spherical, embeddedin a jelly and whitish matrix.(The picture shows eggs 14 hours after fertilization).

Early development: egg with embryo

Eggs hatch in 8–16 days after deposition.Larvae develop in 37 days at 13°C.Dry weight:• 164 µg at hatching• 11600 µg at metamorphosis.


Young adults

1 cm Foto: Pietro Ceccuzzi

Younger individuals are gray, withtraversal bands on sides darker thanin adult.Lateral shape ismore elongated.Sex, determined since birth, can be identified at 1+.

Fully developed adult

(2 cm)


Body symmetric,cross section compressed,lateral shape short and deep.Head is convex,mouth terminal.Age range:2-3 y (M)3-5 y (F)

Links and sourcesNCBIFish BaseITIS, Integrated Taxonomy Information System



http://www.fishbase.org/Summary/SpeciesSummary.cfm?GenusName=Perca&SpeciesName=fluviatilis

http://www.fishbase.org/Summary/SpeciesSummary.cfm?GenusName=Perca&SpeciesName=fluviatilis



perca fluviatilis - dbsm .pdf/percaflu.pdfhabitat slow flowing rivers, deep lakes and ponds, but...

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