Životni ciklus rakušaca Niphargus likanus S. Karaman, 1952 (Amphipoda, Niphargidae) i Synurella ambulans ( Müller, 1846) (Amphipoda, Crangonyctidae) u izvorima uz Gojačku Dobru

master's thesis

• Title (english): The life history of the species Niphargus likanus S. Karaman, 1952 (Amphipoda, Niphargidae) and Synurella ambulans (Amphipoda, Crangonyctidae) in springs near Gojačka Dobra River
• Author: Sanja Škalec
• Mentor: Sanja Gottstein (mentor)
• Committee member: Sanja Gottstein (predsjednik povjerenstva)
• Committee member: Mirjana Pavlica (član povjerenstva)
• Committee member: Zlatko Liber (član povjerenstva)
• Committee member: Ivančica Ternjej (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2012-09-26, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Zakonitosti razmnožavanja vrsta Niphargus likanus i Synurella ambulans istraživana su nizvodno od HE Lešće uz Gojačku Dobru na povremenom izvoru Gorinci i stalnom izvoru Skukani. Uzorci su prikupljani jednom mjesečno od veljače 2008. godine do svibnja 2009. godine. Cilj ovog rada je bio ustanoviti ekologiju i reproduktivnu biologiju vrsta N. likanus i S. ambulans, dok je posebni naglasak bio na utjecaju abiotičkih čimbenika okoliša na pojavljivanje ovigernih ženki. Gustoća populacija je najveća na izvorima pri vrijednostima temperature vode manjim od 17,7 °C. Ovigerne ženke su zabilježene na oba izvora za vrstu S. ambulans, a za vrstu N. likanus samo na izvoru Skukani s većom brojnošću tijekom zime (prosinac, siječanj, veljača) i u proljeće (svibanj). Jedinke s obilježjima interseksa i jedinke u ampleksusu kod istraživanih vrsta nisu zabilježene tijekom ovog istraživanja.

Abstract (english)

The reproductive traits of the species Niphargus likanus and Synurella ambulans were examined downstream from the HPP Lešće on permanent spring Gorinci and periodical spring Skukani near Gojačka Dobra River. Samples were collected once a month in the period from February 2008 to May 2009. The primary goal was to establish the ecology and reproductive biology of the species Niphargus likanus and Synurella ambulans. Influence of abiotic factors on appearance of ovigerous females was the main focus of the research. The highest population density of the species was recorded in the springs with the water temperature below 17,7 °C. The ovigerous females were recorded in both springs for the species S. ambulans and only in Skukani spring for species N. likanus with high density during the winter (December, January, February) and spring (May). Amplexus and intersex individuals of N. likanus and S. ambulans were not found out in our study.

• Keywords: Amphipoda; životni ciklus; gustoća populacija; odnos spolova; ovigerne ženke; izvori; Dobra
• Keywords (english): Amphipoda; lifehistory; population density; sex ratio; ovigerous females; springs; Dobra River
• Language: croatian
• URN:NBN: urn:nbn:hr:217:263633
• 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 11:45:57