Pregled bibliografske jedinice broj: 135880
Estimation of noble crayfish (Astacus astacus L.) population size in the Velika Paklenica Stream (Croatia)
Estimation of noble crayfish (Astacus astacus L.) population size in the Velika Paklenica Stream (Croatia) // European native crayfish with a special focus on Astacus astacus : linking socioeconomics and conservation : book of abstracts / Taugbol, Trond (ur.).
Oslo: CRAYNET, 2003. (poster, međunarodna recenzija, sažetak, znanstveni)
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Naslov
Estimation of noble crayfish (Astacus astacus L.) population size in the Velika Paklenica Stream (Croatia)
Autori
Maguire, Ivana ; Hudina, Sandra ; Lucić, Andreja ; Erben, Radovan
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
European native crayfish with a special focus on Astacus astacus : linking socioeconomics and conservation : book of abstracts
/ Taugbol, Trond - Oslo : CRAYNET, 2003
Skup
European native crayfish with a special focus on Astacus astacus : linking socioeconomics and conservation
Mjesto i datum
Halden, Norveška, 01.09.2003. - 04.09.2003
Vrsta sudjelovanja
Poster
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
Astacus astacus; estimation of population size; mark-recapture; Croatia
Sažetak
Astacus astacus is one of four native european crayfish species living in Croatian freshwater habitats. It is naturally distributed in rivers belonging to the Black Sea drainage but it also occurs in rivers of Adriatic Sea drainage, where its presence is of anthropogenic origin. There is no written document concerning the introduction of A. astacus into the Velika Paklenica Stream but the information obtained from local inhabitants says that the introduction took place during the first half of the 20th century. Velika Paklenica Stream is situated in Paklenica National Park, on southern slopes of the Velebit Mountain, Middle Adriatic. Our study was conducted in July 2000 and in July 2002. To estimate the population size we used mark-recapture techniques (Schnabel Method and Schmacher and Eschmeyer Method). Crayfish were trapped with baited LiNi traps that were set along the both sides of the stream shore in 10 m intervals and they were left in the stream overnight. Caught animals were individually marked, by piercing the holes in uropods and thelson, and than released. In July 2000 we caught all together 233 crayfish, from which 70 specimens were trapped more than once. In July 2002 we caught 302 crayfish, from which 86 were trapped more than once. In this work we will discuss the differences in the population size between the two years.
Izvorni jezik
Engleski
Znanstvena područja
Biologija
