Reproduktivne značajke kapelske svijetlice - Telestes karsticus Marčić i Mrakovčić, 2011 (Actinopterygii, Cyprinidae) u potoku Sušik

master's thesis

• Title (english): Reproduction of the Telestes karsticus Marčić and Mrakovčić, 2011 (Cyprinidae, Actinopterygii) in the Sušik Creek
• Author: Ana Milković
• Mentor: Perica Mustafić (mentor)
• Committee member: Perica Mustafić (predsjednik povjerenstva)
• Committee member: Vesna Benković (član povjerenstva)
• Committee member: Marija Gligora Udovič (član povjerenstva)
• Committee member: Davor Zanella (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2012-10-19, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Kapelska svijetlica (Telesetes karsticus Marčić i Mrakovčić, 2011) je endemska vrsta iz porodice Cyprinidae, reda šaranki (Cypriniformes). To je stenoendemska vrsta dunavskog slijeva, u Hrvatskoj zabilježena na svega nekoliko lokaliteta oko Velike i Male Kapele. Kako je vrsta tek nedavno opisana, o njenoj se biologiji, pa tako i reproduktivnim značajkama, vrlo malo zna. Kako bi se pridonijelo njenoj zaštiti važno je poznavanje biologije i ekologije vrste, te je cilj istraživanja bio skupiti temeljna saznanja o reprodukciji kapelske svijetlice. Uzorci riba sakupljani su u razdoblju od trinaest mjeseci tijekom 2007. i 2008. godine na lokalitetu potok Sušik u polju Lug, a analizirane su 624 jedinke. Rezultati pokazuju kako je omjer spolova u istraživanoj populaciji u gotovo svakom dijelu godine na strani mužjaka. Ženke dosežu veću dužinu tijela od mužjaka, te prevladavaju kod standardnih dužina tijela većih od 80 mm. Reproduktivni ciklus kapelske svijetlice na vrhuncu je u travnju, tj. kada je temperatura vode u potoku Sušik između 7 i 14˚C. U vrijeme mrijesta mužjaci u vodi oplođuju adhezivna jaja koja se lijepe na kamenitu podlogu. Apsolutni fekunditet spolno zrelih ženki procijenjen je na srednju vrijednost od 1536 jaja, odnosno relativni fekunditet je oko 162 jaja po gramu mase tijela.

Abstract (english)

Karst Dace (Telestes karsticus Marčić i Mrakovčić, 2011) is an endemic species from the family of Cyprinidae, order of Cypriniformes. It is a stenoaendemic species living in the Danube basin whose presence in Croatia has been recorded on a few localities around Velika and Mala Kapela. As the species has been described only recently, little is known about its biological features, including reproductive characteristics. In order to contribute to its protection it is important to know the biology and ecology of the species. The aim of the research was to collect basic information on its reproduction. Fish samples were collected over a period of thirteen months during 2007 and 2008 on the Sušik stream in the Lug field. 624 individual specimens were analysed. The results show that the sex ratio in the studied population favours the males in almost every part of the year. Females reach greater body length than males and dominate in standard body length greater than 80 mm. Reproductive cycle of T. karsticus peaks in April, i.e., when the temperature of the water in the Sušik stream is between 7˚C and 14 ˚C. At the time of spawning, males fertilise adhesive eggs in the water that are glued to the rocky surface. Absolute fecundity of sexually mature females has been estimated at a mean value of 1536 eggs and the relative fecundity is about 162 eggs per gram of body weight.

• Keywords: ribe; beskralješnjaci; reprodukcija; Polje lug; Dunavski slijev; Telestes karsticu
• Keywords (english): Danube basin; fish; invertebrates; Lug field; reproduction; Telestes karsticus
• Language: croatian
• URN:NBN: urn:nbn:hr:217:843650
• Study programme: Title: Ecology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra ekologije i zaštite prirode (magistar/magistra ekologije i zaštite prirode)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2017-05-02 09:53:43