Key-words: crayfish, diversity, Bosnia and HerzegovinaThe aim of this research paper is to present available data on the distribution of freshwater crayfish in Bosnia and Herzegovina, including data from the literature and those of our own investigations. According to historical data, the existence of four native European species were reported within the territory of Bosnia and Herzegovina: Astacus astacus (Linnaeus, 1758), A. leptodactylus (Eschscholtz, 1823), Austropotamobius torrentium (Schrank, 1803) and A. pallipes (Lereboullet, 1858). Our recent research has confirmed the presence of these four species. A. torrentium has been found in the tributaries of the rivers Bosna and Una, in ecologically similar habitats, that is, in relatively clean waters with a small amount of organic material (water quality category I or II). A. pallipes is predominantly present in the Neretva River basin, partly in the Una River basin and in the Cetina River basin, forming both river and lake populations (in the Boracko Lake are present in particularly large numbers) -waters with oxygen concentrations greater than 9 mg·L −1 and BOD5 values less than 2 mg·L −1 . A. astacus is present in a dense population in waters of the Drina River basin (as river and lake populations), but occurs also in the tributaries of the rivers Bosna (midstream) and Sava. So far, A. leptodactylus was found only at the two localities: Sava River (Brčko area) and Miljacka River (upstream of Sarajevo), in the waters quality of category II (beta-mesosaprobic). Allochthonous species have not been yet recorded in the freshwater habitats of Bosnia and Herzegovina.

UDK 595.371(497.6 Sarajevo) Rad je rezultat izlova jedinki potočnog raka Austropotamobius torrentium iz Nahorevskog potoka u periodu od augusta 2006. do maja 2007. godine. Analiza je obuhvatila i fizičko/hemijske paramtere vode i sastav zoobentosa Nahorevskog potoka. Utvrđeno je da voda spada u kategoriju oligo/betamesosaprobnih ili II kategorije, čista sa manjom količinom alohtone organske materiije u vodotoku. Mjerenjem dužine potočnog raka (šest izlovljenih ženki i pet mužjaka), utvrđeno je da ona varira od 4,5 do 7 cm kod ženke i 1,54 do 7 cm kod mužjaka. Statističkom obradom utvrđeno je da najviše varira težina, a najstabilniji karakter je dužina tijela. Izračunata vrijednost Fulton´s Conditions Factor (RICKER, 1975) i Crayfish Constant, (ADEGBOYE, 1981) ukazuje da je mužjak u boljem kondicionom stanju, što je i rezultat dosadašnjih istraživanja u Evropi. Doprinos rada je utvrđivanje habitata ili staništa potočnog ili raka kamenjara na prostorima Bosne i Hercegovine, koji je 1994. godine uvršten u IUCN listu za prostor naše države.

UDK 595.384.1:591.134(282.249 Neretva) Specimens of white-clawed crayfish have been cought during from May to August 2011. The specimens were fished out from the tributaries of the river Neretva: Neretvica, Sistica and Kraljuscica. The study was done on 100 m of waterstream, where an unequal numbers of individuals was determined. 31 individuals was found in river Neretvica, 10 individuals in river Sistica and 4 in river Kraljuscica. Different hydromorphological characteristics of the waterstream have largely contributed to the different population abundance of this crayfish. Morphometric analysis included six parameters: (TL) total length [cm], (W) weight (gr), (ARL) carapace length [cm], (CPW) carapace width [cm], (ROL) rostrum length [cm], (ROW) rostrum width [cm], (CLL) claws length [cm] and (TEL) tail length [cm]. Total body length of the white- clawed crayfish varied from 4.3 to 8. 6cm, while the individual with maximum length was found in river Neretvica. Weight of the individuals varied from 5g to 26g. Weight is the parameter with the highest coefficient of variation where differences in weight were found in the individuals of equal length. According to the shape (length and width) of the rostrum, crayfish from river Neretvica and Kraljuscica had higher similarity than recripocally than with the individuals cought in river Sistica (isosceles triangle). The connection between body length and carapax width had been determined by linear regression, as well as the connection between body length and claws length. Condition index values are higher in males than in females and the male domination was express in all three watercourses, as well as in the overall sample (28males and 17 females).

UDK: 595.796(497.6) In this paper new data on diversity of wood ants in Bosnia and Herzegovina arepresented. First record of Formica truncorum Fabricius, 1804 from Duboštica isreported for Bosnia and Herzegovina. With this new finding total number of speciesfrom subgenus Formica s. str. known in Bosnia and Herzegovina is raised on five.Analysis of wood ants in central Bosnia indicated presence of Formica rufa Linnaeus,1761 on mountains Trebevic, Ozren, Perun while Formica polyctena Förster, 1850was collected only on Mt. Čemerska.Morphometrical and ethological intermediary indicate different Formica rufaphenotypes or hybrid Formica rufa x polyctena in investigated area. Polydomy wasobserved in Formica polyctena and F. rufa. On the mountain Perun 30 colonies ofFormica rufa in one kilometer transect were found, which represents the highestknown density in Bosnia-Herzegovina.

SAŽETAKU radu je prikazana distribucija bjelonogog raka Austropotamobius pallipes na području Bosne i Hercegovine koji je uslijed taksonomske nedefinisanosti dobio status species complex (kompleks vrsta). Distribucija je rezultat analize historijskih i novih podataka koji su rezultat istraživanja od 2000. do 2010. godine. Prema historijskim podacima ova vrsta registrovana je prvi put u Livnu kao Astacus pallipes, a kasnije u slivu Cetine i u Hercegovini. Novi nalazi o distribuciju ukazuju na njegovo rasprostranjenje u slivu Neretve i slivu Une. Konstatovani su habitati bjelonogog raka u jezerima Boračko jezero i Mostarsko blato zajedno sa plemenitim rakom Astacus astacus. Populacije konstatovane na području Bosne i Hercegovine karakterišu variranja morfometrijskih parametara (širine i dužine rostruma, dužina cephalotoraksa i sl.) kao i populacija na području Evrope. Kao najstarija vrsta iz familije Astacidae i osjetljiva na organsko opterećenje, zahtijeva urgentnu zaštitu na svim nivoima na prostoru naše države.