Naslov
Značajke reagiranja stigofilnih rakušaca na uvjete u hiporeičkoj zoni u ulozi strategije rasta
(Stygophilous amphipod traits respond to hyporheic conditions as a function of growth strategy)

Autori
Redžović, Zuzana ; Gottstein, Sanja ; Erk, Marijana

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Zbornik sažetaka 14. hrvatskog biološkog kongresa = Book of abstracts of the 14th Croatian biological congress / Caput Mihalić, Katarina ; Mičetić Stanković, Vlatka ; Urlić, Inga ; Mešić, Armin ; Kružić, Petar - Zagreb : Hrvatsko biološko društvo, 2022, 65-66

Skup
14. hrvatski biološki kongres s međunarodnim sudjelovanjem = 14th Croatian biological congress with international participation

Mjesto i datum
Pula, Hrvatska, 12.10.2022. - 16.10.2022

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Domaća recenzija

Ključne riječi
podzemni rakušci ; starost ; stopa rasta ; ekoton ; slatkovodni okoliš / subterranean amphipods ; age ; growth rate ; ecotone ; freshwater environment
(subterranean amphipods ; age ; growth rate ; ecotone ; freshwater environment)

Sažetak
The growth and age structure estimation in crustaceans is severely limited since their hard exoskeleton does not grow. Moreover, the loss of the old exoskeleton and appearance of the new one is followed by weight loss during the molt cycles. In the absence of permanent growth structures and parameters (such as the otoliths of fishes or shells of bivalves), indirect approaches have been developed to define age. Using the length-based methods and growth model, the aim of this study was to determine: i) age length ; ii) age frequency (growth parameters - asymptotic total body length -TBL∞), and iii) growth coefficient (K) of freshwater stygophilous amphipod Synurella ambulans from the hyporheic zone of the Sava River (sampling sites: Medsave and Jarun) sampled seasonally from December 2018 to October 2019. The estimated parameters of the von Bertalanffy growth function for Jarun were: L∞ = 6.09 mm, K = 0.26 y- 1 in females and: L∞ = 4.46 mm, K = 1.30 y-1 for males ; while for Medsave they were: L∞ = 6.67 mm, K= 0.46 y-1 in females and: L∞ = 5.04 mm, K = 4.20 y-1 in males. On both study sites the growth parameters were different between sexes, especially regarding to the higher value of K calculated for males. Our results give the first insight into the growth patterns of S. ambulans living in vulnerable ecotone, exposed to anthropogenic impacts. Moreover, the water temperature, dissolved O2 concentration and food availability affected the metabolic rate and the growth strategy.

Izvorni jezik
Hrvatski, engleski

Znanstvena područja
Biologija, Interdisciplinarne prirodne znanosti

POVEZANOST RADA