Are Silver tipped tetras aggressive?

What kind of fish has no adipose fin?

The genus Hasemania is one of the few in the family Characidae in which members do not possess an adipose fin. This species is ubiquitous in most dealers’ tanks and is one of the best choices for the newcomer to fishkeeping.

Are adipose fins mechanosensitive in Corydoras aeneus?

However, adipose fins have evolved repeatedly within Teleostei, suggesting adaptive function. Recently, adipose fins were proposed to function as mechanosensors, detecting fluid flow anterior to the caudal fin. Here we test the hypothesis that adipose fins are mechanosensitive in the catfish Corydoras aeneus.

What are adipose fins?

Adipose fins are enigmatic second dorsal fins found on approximately 6000 species of teleost fishes [ 1 ], or about 10% of vertebrate species [ 2 ]. In general, adipose fins are smaller than other fins and lack associated musculature and skeleton [ 3 ].

Does the adipose fin of the brown trout have sensory innervation?

Later, consistent with Reimchen & Temple’s hypothesis [ 7 ], it was found that the adipose fin of the brown trout, Salmo trutta (Linnaeus 1758), has sensory innervation [ 8 ].

Does amputation of the adipose fin affect caudal fin kinematics during steady swimming?

This hypothesis was first articulated by Reimchen & Temple [ 7 ], who found that the amputation of the adipose fin of the steelhead trout, Oncorhynchus mykiss (Walbaum 1792), caused altered caudal fin kinematics during steady swimming that suggest reduced swimming efficiency [ 7 ].

What kind of fish has adipose fin clips?

Only a few fish have an adipose fin, which is a tiny, fleshy fin located beneath the larger dorsal fin. These fish include trout, salmon, and catfish. The majority of trout and salmon with adipose fin clips also have a coded-wire tag in their snout.

Are adipose fins mechanosensors of Teleostei?

However, adipose fins have evolved repeatedly within Teleostei, suggesting adaptive function. Recently, adipose fins were proposed to function as mechanosensors, detecting fluid flow anterior to the caudal fin.

Is the adipose fin of Corydoras aeneus mechanosensitive?

The adipose fin of Corydoras aeneusdevelops from the larval fin fold and is mechanosensitive. In 2016 Ann. Meeting of the Society of Integrative and Comparative Biology, 6 January, Portland, OR.

Is the adipose fin a precaudal sensor?

Neural activity, recorded from nerves that innervate the fin, was shown to encode information on both movement and position of the fin membrane, including the magnitude of fin membrane displacement. Thus, the adipose fin of C. aeneusis mechanosensitive and has the capacity to function as a ‘precaudal flow sensor’.

What are adipose fins in fish?

Adipose fins are enigmatic second dorsal fins found on approximately 6000 species of teleost fishes [1], or about 10% of vertebrate species [2]. In general, adipose fins are smaller than other fins and lack associated musculature and skeleton [3].

What is the adipose fin innervated by?

In C. aeneus, adipose fin nerves enter the fin posterior to the fin spine (figure 1b) and ramify repeatedly into the adipose fin membrane, with branches organized approximately parallel to the actinotrichia. Open in a separate window Figure 1. The adipose fin of C. aeneusis innervated.

Does adipose fin amputation affect caudal fin kinematics in trout?

In the steelhead trout (O. mykiss), the effect of adipose fin amputation on caudal fin kinematics is most pronounced under turbulent conditions, suggesting fin function is related to altered flows [7].

Does turbulent flow stimulate adipose fin kinematics?

Vortices and turbulent flow could also stimulate adipose fins. In the steelhead trout (O. mykiss), the effect of adipose fin amputation on caudal fin kinematics is most pronounced under turbulent conditions, suggesting fin function is related to altered flows [7].

Did the amputation of the adipose fin of the steelhead trout alter kinematics?

This hypothesis was first articulated by Reimchen & Temple [7], who found that the amputation of the adipose fin of the steelhead trout, Oncorhynchus mykiss(Walbaum 1792), caused altered caudal fin kinematics during steady swimming that suggest reduced swimming efficiency [7].

Why do trout have their adipose fin cut off?

It is frequently clipped off to mark hatchery-raised fish, though data from 2005 showed that trout with their adipose fin removed have an 8% higher tailbeat frequency. Additional information released in 2011 has suggested that the fin may be vital for the detection of, and response to, stimuli such as touch, sound and changes in pressure.

What is adipose fin in fish?

An adipose fin consists of a small to elongated fleshy or fatty structure without fin ray supports, located dorsally between the rayed dorsal fin and caudal (tail) fin. It is present in most ostariophysan fishes.

Is adipocyte development in farmed fish adipose?

Adipocyte development is well conserved among vertebrates, and this conservation has facilitated the rapid characterization of several adipogenesis models in fish. This Review presents the main findings of adipogenesis research based in primary cultures of the preadipocytes of farmed fish species.

Is the adipose fin a sensory organ?

They found that for species in moving waters (streams and rivers), an adipose fin was more often present than for species in low-flow environments, such as lakes. Although the specifics of how the fin might work were still unsubscribed, this work was critical toward supporting the notion of the adipose fin as a sensory organ.

Does fin-clipping affect the survival of fish?

In my experience, the age of the fish and the stress put on the fish when handled/clipped, along with the amount of forage fish present in the fish’s environment play a role in survival. Fin-clipping juvenile fish (such as fingerlings) results in lower survival rates than clipping mature fish.

Where does the adipose fin develop in Corydoras aeneus?

Copeia 1965, 194–206. ( doi:10.2307/1440724) Crossref , Google Scholar Stewart TA, Aiello BA, Ho RK, Hale ME. 2016 The adipose fin of Corydoras aeneus develops from the larval fin fold and is mechanosensitive.

Are adipose fins precaudal flow sensors?

Recently, it was proposed that adipose fins function as ‘precaudal flow sensors’ [7,8].

Are adipose fins mechanosensitive?

We tested the hypothesis that adipose fins are mechanosensitive by conducting multi-unit recordings from nerves entering the adipose fin while the fin membrane was deflected laterally by a probe attached to a linear actuator.

Are there differences in the chronology of differentiation among Teleostei species?

Thus, although there are differences in the chronology of the differentiation among species of Teleostei, the processes involved are quite similar and culminate in the formation of analogous structures in the different fishes. Therefore, these data showed here can be applied to the most different groups of Teleostei fish.

What is the skeletal structure of a teleost fish?

Their skeletal structure has evolved towards greater lightness. While teleost bones are well calcified, they are constructed from a scaffolding of struts, rather than the dense cancellous bones of holostean fish. In addition, the lower jaw of the teleost is reduced to just three bones; the dentary, the angular bone and the articular bone.

What is the scientific name of Teleostei?

Teleostei / tɛliːˈɒstiːaɪ / (Greek: teleios “complete” + osteon “bone”), members of which are known as teleosts / ˈtɛliːɒsts /, is by far the largest infraclass in the class Actinopterygii, the ray-finned fishes, containing 96% of all extant species of fish. Teleosts are arranged into about 40 orders and 448 families.