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Investigation of otolith asymmetry in Mulloidichthys flavolineatus and Parupeneus forsskali (Perciformes: Mullidae) from Egypt’s Hurghada fishing harbour on the Red Sea

Jawad Laith, Qasim Audai, Farrag Mahmoud M. S., Osman Alaa, Samy-Kamal Mohamed, Mehanna Sahar, Abdel-Maksoud Yassein

Oceanological and Hydrobiological Studies

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2023

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Vol. 52, No. 1

68--78

EN

The current study aims to calculate and assess the asymmetry of the two goatfish species, Yellowstripe goatfish Mulloidichthys flavolineatus (Lacepède 1801) and Red Sea goatfish, Parupeneus forsskali (Fourmanoir & Guézé 1976) collected from Hurghada fishing harbour, Egypt. The asymmetry valuation for M. flavolineatus and P. forsskali is imperative to demonstrate the impact of asymmetry on the larvae settlement in this vital fishing ground. Asymmetry was calculated for the saccular otolith (Sagittae) biometry, namely length, width, and mass. The results showed that the otolith height had a lower asymmetry value than the otolith length for the two goatfish species inspected. No relationship between the asymmetry value of otolith length and width and total fish length was observed. Both goatfish species’ calculated otolith mass asymmetry was higher than that of many teleost fish species.

2

A comprehensive study of clustering a class of 2D shapes

Kaliszewska Agnieszka, Syga Monika

International Journal of Applied Mathematics and Computer Science

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2022

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Vol. 32, no. 1

95--109

EN

The paper is concerned with clustering with respect to the shape and size of 2D contours that are boundaries of cross-sections of 3D objects of revolution. We propose a number of similarity measures based on combined disparate Procrustes analysis (PA) and dynamic time warping (DTW) distances. A motivation and the main application for this study comes from archaeology. The computational experiments performed refer to the clustering of archaeological pottery.

3

Differences in Troglomorphism and Sexual Dimorphism in Two Sympatric Subtroglophile Crickets of Genus Troglophilus (Insecta: Orthoptera)

Jugovic Jure, Šumer Nika

Polish Journal of Ecology

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2021

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Vol. 69, nr 1

35--50

EN

We investigated morphological variation and sexual dimorphism in two species of syntopic cave crickets (Troglophilus neglectus and T. cavicola) from Northern Balkans. T. cavicola is able to penetrate deeper in caves and stays there for longer periods than T. neglectus. Yet, it has not exhibited clearly stronger constructive (body size, elongation of appendages, increased spinulation) or reductive (eye reduction) traits than T. neglectus. Moreover, contrary to expectation, there is no clear association between more prolonged staying in a stable cave environment and overall lower morphological variability in T. cavicola. Only some of its morphological traits actually showed less while other showed more variation than in T. neglectus. While T. cavicola males are larger than females, there is no such difference in T. neglectus. This may help males of T. cavicola being more competitive towards overall larger T. neglectus. With the exception of the body size, overall sexual dimorphism was better expressed in larger T. neglectus. The morphospaces occupied by males and females overlap more strongly in T. cavicola than in T. neglectus, indicating that ecological niches of both sexes are better separated in the latter species.

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Morphometric study on the lesions in the trachea wall in rats in hyperbaric oxygen therapy

Siermontowski P., Konarski M., Pedrycz A., Wojtowicz T, Ostapowicz van Damme K., Kulig M.

Polish Hyperbaric Research

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2013

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nr 2(43)

7--22

EN

Clinical observations and experimental research results prove the toxic effect of oxygen on the respiratory tract both in normo- and hyperbaria. The majority of available studies concern changes in the lung parenchyma, only some of them refer to the impact of hyperbaric oxygen on the respiratory tract. The objective of the study based on an animal model was to provide an evaluation of the effect of overpressure of exhaled oxygen (oxygen hyperbaria) and the time of its duration on morphological changes in the mucous and submucous membranes of the trachea. Oxygen hyperbaria corresponding to the depth of 5 – 7 metres induces temporary motor agitation and increased aggression in rats lasting from 3 to 20 minutes. Further rises of oxygen pressure cause a reduction of the agitation, whereas at the depth of 40 m it results in extreme weakening of the breathing activity and leads to the animals’ death.Growing oxygen hyperbaria causes thickening of both the mucous and submucous membranes of the rats’ trachea accompanied by narrowing of its lumen. The changes are intensified with prolonged duration of hyperbaric oxygen therapy. The most serious morphological changes were observed in the submucous membrane of the trachea. The dominant lesion consisted of an interstitial oedema with the widening of the vascular bed. Progressing hyperbaria caused thickening of the mucous and submucous membranes with a simultaneous reduction of the trachea lumen. Similar tendencies persisted with prolonged duration of hyperbaria.

PL

Obserwacje kliniczne oraz wyniki badań doświadczalnych dowodzą toksycznego działania tlenu na drogi oddechowe zarówno w normo - jak i hiperbarii. Większość dotychczasowych opracowań dotyczy zmian w miąższu płucnym, tylko pojedyncze odnoszą się do wpływu hiperbarii tlenowej na drogi oddechowe. Celem badań własnych na modelu zwierzęcym, była ocena wpływu nadciśnienia tlenu wdychanego (hiperbarii tlenowej) i czasu stosowania tego nadciśnienia na zmiany morfologiczne w błonie śluzowej i włóknistej tchawicy. Hiperbaria tlenowa odpowiadająca głębokości do 5 - 7 metrów wywołuje u szczurów przejściowe, trwające od 3 do 20 minut pobudzenie ruchowe i zwiększenie agresywności. Dalsze zwiększanie ciśnienia tlenu powoduje zmniejszenie ich ruchliwości, a na głębokości do 40 m doprowadza do ekstremalnego osłabienia oddychania i padania zwierząt. Narastanie hiperbarii tlenowej powoduje u szczurów pogrubienie zarówno błony śluzowej jak i włóknistej tchawicy, przy równoczesnym zwężeniu jej światła. Zmiany te narastają wraz z wydłużaniem czasu działania hiperbarii tlenowej. Wśród tych zmian dominował obrzęk śródmiąższowy z poszerzeniem łożyska naczyniowego. W miarę narastania hiperbarii obserwowano pogrubienie błony śluzowej i włóknistej, przy równoczesnym zmniejszaniu się światła tchawicy. Podobne tendencje utrzymywały się wraz z narastaniem czasu działania hiperbarii.

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Easily-accessible digital palaeontological databases - a new perspective for the storage of palaeontological information

Wolniewicz Paweł

Geologos

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2009

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Vol. 15, No. 3-4

181--188

EN

Techniques that allow to render diverse types of palaeontological data as publicly available internet resources are described. In order to develop an easily accessible digital palaeontological database, three steps should be followed: (1) digitization of the studied specimens, (2) acquisition of morphometric data, and (3) contribution of the data to open and searchable geoinformatic (palaeontological) databases. Digital data should be submitted to internet databases that allow a user to fetch various types of information from dispersed sources (semantic web services).