Current PhD students of the Department of Comparative Anatomy

Anna Dymek - Anna Pecio

The aim of Anna’s PhD dissertation is to describe modifications associated with insemination in the structure of gonads (and gametes) in Osteoglossomorpha fish.

One of the species that I am working with is the butterfly fish, Pantodon buchholzi Peters, 1876 (Pantodontidae, Actinopterygii). This is a freshwater fish living in Central Africa. It is a specialized surface hunter. The common name of this species stems from the horizontal arrangement of the fins which, while jumping, resemble wings. This species is popular among aquarists due to its unusual morphology, diet and small size (max. 13 cm). Sexual dimorphism is visible in the shape of the anal fin; in males it is divided into two parts, whereas females possess an undivided anal fin.

Pantodon buchholzi - plemniki i ciała resztkowe Pantodon buchholzi - pakiet plemników Pantodon buchholzi - plemniki otoczone ciałami resztkowymi
Pantodon buchholzi - plemniki w gruczole dodatkowym Pantodon buchholzi - struktura jądra

Jakub Dymek - Krystyna Żuwała

Jakub is studying the ultrastructure of chemosensory organs in fishes from the families Syngnathidae (pipefishes and seahorses) and Belonidae (needlefish), with reference to reproductive behavior and the environmental conditions of their habitats, and will compare his results with species from other families. These fishes have an unusual breeding biology that includes that reversal of gender roles in some species, with the male caring for the eggs.

Doryichthys martensii (Peters, 1868) (Syngnathidae, Actinopterygii) Small fish (up to 15cm long), occurring in freshwater of Indonesia, Malaysia, Thailand and Borneo.

Xenentodon cancila (Hamilton, 1822) (Belonidae, Actinopterygii) Small fish (up to 40cm long), occurring in freshwater of Sri Lanka and eastern India. In the related Garfish (Belone belone) the olfactory chamber is missing and olfactory epithelium is on the papilla, on the outside of the skin.

Doryichthys boaja (Bleeker, 1850) (Syngnatidae, Actinopterygii) Small fish (up to 40cm long), occurring in freshwater of Indonesia, Thailand, Malaysia and Vietnam, sympatric with D. martensii.

Doryichthys martensii Xenentodon cancila

Józef Różański - Krystyna Żuwała

Józef is studying the variability in structure of chemoreception organs (olfactory and taste) in the family Salamandridae (Caudata, Amphibia). His thesis is focused on interspecific differences in anatomy, morphology and ultrastructure of chemoreception organs depending on life environment and stage of ontogeny. Also, he is conducting observations of changes in morphology and ultrastructure of chemoreception organs in salamandrids over the yearly cycle, and changes incurred by breeding environment.

Samiec traszki krokodylowej (Tylototriton verrucosus). Fot. Józef Różański  Samiec salamandry plamistej (Salamandra salamandra). Fot. Józef Różański Samica traszki górskiej (Ichthyosaura alpestris). Fot. Józef Różański
Samiec traszki górskiej (Ichthyosaura alpestris). Fot. Józef Różański Samiec traszki zwyczajnej (Lissotriton vulgaris) w szacie godowej. Fot. Józef Różański
The species selected for study include a fully terrestrial representative of ‘true salamanders’ (the fire salamander Salamandra salamandra), two species of newts which live on land but breed in water (smooth newt Lissotriton vulgaris and alpine newt Ichthyosaura alpestris), a newt that spends most of the year in the water (crocodile newt Tylototriton verrucosus) and a species that has four stages of development but in adult form lives in an entirely aquatic environment (eastern newt Notophthalmus viridescens).
Tarczka smakowa u dojrzałego samca traszki krokodylowej Tylototriton verrucosus, SEM Komórka węchowa z wypustkami u traszki krokodylowej Tylototriton verrucosus SEM

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