Hai una foto? Identifica i pesci all'istante con l'app Fishby.
Apri l'appDescrizione
Oncorhynchus nerka, commonly known as Sockeye Salmon, is an anadromous species of salmon native to the northern Pacific Ocean and rivers discharging into it. It is renowned for its vibrant red flesh and distinct life cycle, which typically involves spending 1-3 years in freshwater lakes before migrating to the ocean for 1-4 years, and then returning to its natal freshwater system to spawn. Some populations, known as kokanee, are entirely freshwater-resident.
Caratteristiche fisiche
- Forma del corpo
- torpedo
- Colorazione
- During their marine phase, Sockeye Salmon are typically metallic blue-green on the back and silvery on the sides and belly. As they approach spawning, both sexes undergo a dramatic transformation: their bodies turn brilliant red, and their heads become green. Males develop a pronounced humped back and an elongated, hooked snout (kype).
- Tipo di squame
- cycloid
- Posizione della bocca
- terminal
- Caratteristiche distintive
- Vibrant red spawning coloration with green head, Lack of large spots on back or tail (distinguishing from Chinook, Coho, Pink), Numerous, long, and slender gill rakers (30-40 on the first arch), Relatively small scales compared to body size, Large, prominent eyes
- Pinna dorsale
- Single dorsal fin, soft-rayed, typically with 11-16 rays. An adipose fin is present.
- Pinna caudale
- Moderately forked caudal fin, unspotted.
- Pinna pettorale
- Paired pectoral fins, relatively small.
- Pinne distintive
- Adipose fin present, characteristic of salmonids. Pelvic fins are abdominal.
Consigli per l'identificazione
Spawning Coloration
The most definitive visual cue for adult Sockeye is their brilliant red body and green head during spawning. No other Pacific salmon exhibits this exact coloration.
Absence of Spots
Unlike Chinook, Coho, and Pink Salmon, Sockeye typically lack large, distinct black spots on their back or tail fin. Small, indistinct speckles may be present but are not prominent.
Gill Rakers
A key internal identification feature is the high number (30-40) of long, slender gill rakers on the first gill arch, adapted for filtering plankton. This requires careful examination.
Body Shape (Spawning Males)
Spawning males develop a pronounced humped back and a strongly hooked snout (kype), which is less developed in females and non-spawning individuals.
Habitat
- Tipo di acqua
- freshwater
- Profondità
- Varies significantly. In freshwater lakes, they inhabit pelagic zones. In the ocean, they are typically found in surface waters to moderate depths (0-200m). Spawning occurs in shallow, gravel-bottomed streams or lake shoals.
- Ambiente
- Anadromous, requiring both freshwater (lakes for juvenile rearing, rivers for spawning) and marine (open ocean) environments. Kokanee populations are entirely freshwater-resident, typically in deep, cold lakes.
- Areale geografico
- North Pacific Ocean, from the Sacramento River in California north to the Bering Sea, and west to Hokkaido, Japan, and the Anadyr River in Siberia. Major populations are found in Alaska, British Columbia, and the Pacific Northwest of the United States.
Informazioni sull'acquario
- Livello di cura: expert
- Temperamento: aggressive
- Dieta: carnivore
- Dimensione minima della vasca: Not suitable for home aquaria due to size, migratory needs, and specific environmental requirements.
- Temperatura: 4-14°C (39-57°F) for freshwater stages; variable in marine environment
- Livello di pH: 6.5-8.0
- Durezza: Soft to moderately hard
- Compatibilità: Not compatible with other fish in an aquarium setting due to size, predatory nature, and specific life cycle requirements.
- Requisiti speciali: Requires large, specialized facilities mimicking natural river and lake environments, with strong currents and specific temperature/photoperiod regimes. Not a species for typical aquarists.
Informazioni in natura
- Stato di conservazione: least concern
- Stagionalità: Spawning runs typically occur from late spring through fall, depending on the specific river system and geographic location. Commercial fishing seasons are regulated to coincide with these runs.
- Prezzo di mercato: High, varies seasonally and by region
- Importanza commerciale: high
- Sapore: Rich, distinct salmon flavor, often described as more pronounced than other salmon species.
- Consistenza: Firm, flaky, and moist with high oil content.
- Metodi di cottura: Grilling, Baking, Pan-searing, Smoking, Poaching
- Valore nutrizionale: Excellent source of Omega-3 fatty acids, high in protein, Vitamin D, and B vitamins.
Fatti chiave
The Reddest Salmoninteresting
Sockeye Salmon are famous for their intensely red flesh, which is due to their diet rich in crustaceans containing astaxanthin, a powerful antioxidant pigment.
Lake-Dependent Juvenilesbehavior
Unlike most other Pacific salmon, Sockeye juveniles typically spend 1-3 years rearing in freshwater lakes before migrating to the ocean. This makes healthy lake ecosystems crucial for their survival.
Kokanee: The Landlocked Sockeyeamazing
Some populations of Oncorhynchus nerka are entirely freshwater-resident, never migrating to the ocean. These are known as kokanee salmon and are typically smaller than their anadromous counterparts.
Precise Navigationbehavior
Sockeye Salmon exhibit remarkable homing abilities, navigating thousands of kilometers from the ocean back to their exact natal stream or lake to spawn, often using olfactory cues.
Massive Spawning Runsrecord
Certain Sockeye Salmon runs, such as those in Bristol Bay, Alaska, are among the largest salmon migrations in the world, involving tens of millions of fish.
Informazioni di sicurezza
Sicuro- Livello di sicurezza: safe
- Velenoso: No
- Commestibilità: edible
- Note sul maneggio: Sockeye Salmon are not dangerous to handle. Standard precautions for handling any large fish should be observed, such as avoiding sharp fins and slippery surfaces. During spawning, males can be aggressive towards each other but pose no threat to humans.
Specie simili
Chinook Salmon
Oncorhynchus tshawytscha
Chinook have irregular black spots on their back and both lobes of the caudal fin, and black gums at the base of their teeth. Sockeye lack prominent spots and have white gums. Chinook are generally much larger.
Coho Salmon
Oncorhynchus kisutch
Coho have spots on their back and the upper lobe of the caudal fin, and white gums. Their spawning coloration is typically dark red to maroon, not the bright red and green of Sockeye. Coho have fewer gill rakers (19-25).
Pink Salmon
Oncorhynchus gorbuscha
Pink Salmon have large, oval-shaped spots on their back and entire caudal fin. Spawning males develop a very pronounced hump. They are generally smaller than Sockeye and have much smaller scales.
Chum Salmon
Oncorhynchus keta
Chum Salmon lack distinct spots. Spawning Chum develop vertical bars of green and purple on their sides. They have fewer gill rakers (18-26) and a more pointed snout than Sockeye.
Classificazione scientifica
- Regno
- Animalia
- Phylum
- Chordata
- Classe
- Actinopterygii
- Ordine
- Salmoniformes
- Famiglia
- Salmonidae
- Genere
- Oncorhynchus
- Specie
- Oncorhynchus nerka
Esplora Sockeye Salmon
Identifica pesci ovunque
Gratis su iOS, Android e Web. Identificazione tramite foto, dettagli completi sulle specie e molto altro.