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Anchoa lyolepis, commonly known as Manjuba or Dusky Anchovy, is a small, schooling pelagic fish belonging to the family Engraulidae. It is characterized by its slender, elongated body and a prominent snout that extends beyond its lower jaw. This species plays a crucial ecological role as a forage fish in its marine and estuarine habitats.
Características físicas
- Formato do corpo
- elongated
- Coloração
- Silvery sides with a distinct, often iridescent, lateral stripe that runs from the operculum to the caudal fin. Dorsal surface is typically greenish-blue to brownish. Fins are generally translucent.
- Tipo de escama
- cycloid
- Posição da boca
- inferior
- Características distintivas
- Snout projecting significantly beyond the tip of the lower jaw., Maxilla (upper jaw bone) extends posteriorly to or beyond the posterior margin of the preoperculum., A prominent, often silvery, lateral stripe., Relatively small size, typically not exceeding 15 cm in total length.
- Nadadeira dorsal
- Single dorsal fin, typically located slightly posterior to the midpoint of the body. Composed of 12-15 soft rays.
- Nadadeira caudal
- Deeply forked caudal fin, characteristic of fast-swimming pelagic species.
- Nadadeira peitoral
- Relatively short pectoral fins, typically with 12-14 rays.
- Nadadeiras características
- Pelvic fins are small and located abdominally, anterior to the dorsal fin origin.
Dicas de identificação
Snout Projection
The most reliable distinguishing feature is the snout extending noticeably beyond the lower jaw. This is a key characteristic of the genus Anchoa.
Maxilla Length
Observe the maxilla; in Anchoa lyolepis, it extends to or beyond the posterior margin of the preoperculum, but typically not as far as in some other Anchoa species.
Lateral Stripe
The presence of a distinct, often silvery or iridescent, lateral stripe is a good indicator, though its prominence can vary.
Body Shape and Size
Its slender, elongated body and small adult size (usually under 15 cm) help differentiate it from larger clupeiforms.
Habitat
- Tipo de água
- saltwater
- Profundidade
- Typically found in shallow coastal waters, estuaries, and lagoons, from the surface down to about 50 meters.
- Ambiente
- Prefers turbid, nutrient-rich waters over sandy or muddy bottoms. Often found in large schools in open water or near shorelines.
- Distribuição geográfica
- Western Atlantic Ocean, from Massachusetts (USA) south to Santa Catarina (Brazil), including the Gulf of Mexico and the Caribbean Sea.
Informações sobre aquário
- Nível de cuidado: expert
- Temperamento: peaceful
- Alimentação: filter_feeder
- Tamanho mínimo do aquário: 200 gallons
- Temperatura: 22-28°C (72-82°F)
- Nível de pH: 8.1-8.4
- Dureza da água: 8-12 dKH
- Compatibilidade: Best kept in species-specific tanks or with other very small, peaceful planktivores. Avoid housing with predatory fish.
- Requisitos especiais: Requires a very large, well-established aquarium with excellent filtration and strong water flow to simulate natural schooling conditions. Live planktonic food is essential for long-term survival. Highly sensitive to water quality fluctuations and stress.
Informações no ambiente natural
- Estado de conservação: least concern
- Sazonalidade: Spawning typically occurs during warmer months, leading to higher abundance in coastal waters. Availability for fisheries can vary seasonally.
- Preço de mercado: Low to moderate, depending on region and demand for bait or direct consumption.
- Importância comercial: medium
- Sabor: Mild, slightly oily, delicate flavor.
- Textura: Soft, flaky, and tender.
- Métodos de preparo: Fried, Pickled, Salted, Used in fish pastes or sauces
- Valor nutricional: Rich in Omega-3 fatty acids, protein, and essential vitamins and minerals.
Fatos principais
Forage Fishbehavior
Anchoa lyolepis is a critical forage fish, forming a vital link in marine food webs by converting plankton into biomass consumed by larger predators such as larger fish, seabirds, and marine mammals.
Schooling Behaviorbehavior
This species forms dense schools, a common anti-predator strategy that also aids in feeding efficiency and reproduction.
Nocturnal Vertical Migrationbehavior
Manjuba often exhibits diel vertical migration, moving to shallower waters at night to feed on zooplankton and descending to deeper waters during the day to avoid visual predators.
Rapid Life Cycleinteresting
Like many small pelagic fish, Anchoa lyolepis has a relatively short lifespan and rapid reproductive cycle, allowing its populations to recover quickly from environmental fluctuations or fishing pressure.
Bait Fishinteresting
Due to its abundance and schooling behavior, Manjuba is frequently used as live or dead bait in recreational and commercial fisheries for larger predatory fish.
Informações de segurança
Seguro- Nível de segurança: safe
- Venenoso: Não
- Comestibilidade: edible
- Observações de manuseio: No specific handling precautions are required. They are small, non-aggressive fish. Handle gently if caught for bait or consumption to avoid damage.
Espécies similares
Striped Anchovy
Anchoa hepsetus
Anchoa hepsetus typically has a longer maxilla that extends well beyond the preoperculum, often reaching the gill opening. Its lateral stripe is usually more pronounced and often wider than in A. lyolepis. A. hepsetus also tends to be slightly larger on average.
Bay Anchovy
Anchoa mitchilli
Anchoa mitchilli is generally smaller and more robust-bodied than A. lyolepis. Its maxilla is shorter, usually not extending beyond the preoperculum. The lateral stripe in A. mitchilli is often less distinct or absent, especially in smaller individuals.
Common Anchovy
Engraulis encrasicolus
While not typically overlapping in the same primary geographic range, Engraulis encrasicolus (found in the Eastern Atlantic and Mediterranean) has a shorter, blunter snout and a less pronounced lateral stripe compared to Anchoa species. Its body is also generally more rounded.
Classificação científica
- Reino
- Animalia
- Filo
- Chordata
- Classe
- Actinopterygii
- Ordem
- Clupeiformes
- Família
- Engraulidae
- Gênero
- Anchoa
- Espécie
- Anchoa lyolepis
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