Diversification of brain and sense organ morphology in antarctic dragonfishes (Perciformes: Notothenioidei: Bathydraconidae)

  title={Diversification of brain and sense organ morphology in antarctic dragonfishes (Perciformes: Notothenioidei: Bathydraconidae)},
  author={Joseph T. Eastman and Michael J Lannoo},
  journal={Journal of Morphology},
In the subzero shelf waters of Antarctica, fishes of the perciform suborder Notothenioidei dominate the fish fauna and constitute an adaptive radiation and a species flock. The 16 species of dragonfishes of the family Bathydraconidae live from surface waters to nearly 3,000 m and have the greatest overall depth range among notothenioid families. We examined the anatomy and histology of the brain, retina, and cephalic lateral line system of nine bathydraconid species representing 8 of the 11… 

Brain and sensory organ morphology in Antarctic eelpouts (perciformes: Zoarcidae: Lycodinae)

The anatomy and histology of the brains, cranial nerves, olfactory apparatus, cephalic lateral lines, taste buds, and retinas of three Antarctic zoarcid species, representing three of the nine genera from this region, are documented.

Brain and sense organ anatomy and histology of two species of phyletically basal non‐Antarctic thornfishes of the Antarctic suborder Notothenioidei (Perciformes: Bovichtidae)

The South Atlantic bovichtids Bovichtus diacanthus, the klipfish from tide pools at Tristan da Cunha, and Cottoperca gobio, the frogmouth from the Patagonian shelf and Falkland Islands are focused on.

Brain and sense organ anatomy and histology of the Falkland Islands mullet, Eleginops maclovinus (Eleginopidae), the sister group of the Antarctic notothenioid fishes (Perciformes: Notothenioidei)

At the level of organ system morphology, perciform brain and sensory systems are suitable for conditions on the Antarctic shelf, with only minor alterations in structure in directions exhibited by other fish groups inhabiting deep water.

Brain and sense organ anatomy and histology in hemoglobinless Antarctic icefishes (Perciformes: Notothenioidei: Channichthyidae)

The anatomy and histology of the neural structures, the brain and sensory systems of channichthyids show little that is remarkable compared to other fishes, and exhibit little diversification within the family.

Divergence of brain and retinal anatomy and histology in pelagic antarctic notothenioid fishes of the sister taxa Dissostichus and Pleuragramma

Although Dissostichus and Pleuragramma are sympatric in the water column, their brains and retinae are highly divergent and reflect the influences of both phylogeny and ecological partitioning of the pelagic realm.

Neuromorphological disparity in deep-living sister species of the Antarctic fish genus Trematomus

The morphology is unequivocally differentiating for habitat depths and conclusively documents a shift toward reliance on non-visual senses in T. loennbergii, consistent with collection data indicating this species lives at greater depths than T. lepidorhinus.

Aspects of the morphology of phyletically basal bovichtid fishes of the Antarctic suborder Notothenioidei (Perciformes)

Histology indicates that Balushkin’s antesupracleithral organ is the thymus, a lymphoid organ that involutes with age in notothenioids, and a new ocular character complex first recognized here reinforces the phyletically basal position of bovichtids.

Life history traits of rare Antarctic dragonfishes from the Weddell Sea

Abstract The life history traits of bathydraconids, deep-living fishes distributed all around the Antarctic continent, are poorly known. In particular, very few data are available on the relatively

Comparative gross encephalon morphology in Callichthyidae (Teleostei: Ostariophysi: Siluriformes)

The conditions observed on the encephalons examined suggest that representatives of Callichthyidae have great taste perception and processing, while Corydoradinae stand out for visual acuity and callichthyinae for mechanoreception processing subunits, and the results indicate that the en head has important features for systematic studies of the family bringing greater resolution to current phylogenetic hypotheses.

The evolution of complex brains and behaviors in African cichlid fishes

The effects of both social organization and the physical environment, specifically habitat complexity, on the brains and behavior of highly visual African cichlid fishes are explored, drawing on examples from primates and birds where appropriate.



Anatomy and histology of the brain and sense organs of the antarctic plunderfish dolloidraco longedorsalis (perciformes: notothenioidei: artedidraconidae), with comments on the brain morphology of other artedidraconids and closely related harpagiferids

The anatomy and histology of the brain and special sense organs of Dolloidraco are presented and compared to the brains of other artedidraconids, closely related harpagiferids, and more generally to other notothenioids; the role of pedomorphy in producing simplified brain morphologies is discussed.

Diversification of brain morphology in antarctic notothenioid fishes: Basic descriptions and ecological considerations

Notothenioid brains are more similar to the brains of temperate perciforms than to the unusual brains of cave‐dwelling and deep‐sea fishes.

Morphology of the brain and sense organs in the snailfish Paraliparis devriesi: Neural convergence and sensory compensation on the Antarctic shelf

The Antarctic snailfish Paraliparis devriesi (Liparidae) is an epibenthic species, inhabiting depths of 500–650 m in McMurdo Sound, and shares well‐developed olfactory systems, an enlarged preoptic‐hypophyseal axis, and subependymal expansions.

Anatomy and histology of the brain and sense organs of the Antarctic eel cod Muraenolepis microps (Gadiformes; Muraenolepididae)

Although the waters of the Antarctic shelf are cold, dark, and deep, brain and sense organ morphology in Muraenolepis are remarkably free of extreme specialization.

Fish Brains: Evolution and Anvironmental Relationships

The development of cognitive skills (spatial learning, problem solving) in fish seems to be associated with visual orientation and well-structured habitats, and how habitats relate to the relative importance of different sensory faculties is asked.

Ocular morphology in antarctic notothenioid fishes

  • J. Eastman
  • Environmental Science
    Journal of morphology
  • 1988
Ocular morphology of the eyes of 18 species revealed ocular morphology that was generally similar to that of coastal fishes elsewhere in the world, and unlike that of deep sea fishes living in perpetual darkness.

Adaptations for cryopelagic life in the antarctic notothenioid fish Pagothenia borchgrevinki

The retina had many cones indicating the eye was adapted to both diurnal and nocturnal vision and the values of the fineness ratio and the indices of trunk shape and flatness suggested streamlining and drag reduction, adaptations to life in the water column.

Use of the lateral line and tactile senses in feeding in four antarctic nototheniid fishes

  • J. Janssen
  • Environmental Science
    Environmental Biology of Fishes
  • 2004
It is likely that further studies of winter diet and prey behavior may reveal the relative advantages of the two repositioning styles, and it is argued that, because T. bernacchii has wider canals than T. pennellii, it must move more slowly to reduce self-generated noise.