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Background. Roach, Rutilus rutilus (Linnaeus, 1758), is an omnivorous fish species that is able to utilise a range of food resources. Both juvenile and older roach can negatively affect zooplankton abundance in freshwater bodies of water; hence populations are often reduced (biomanipulated) in order to increase zooplankton populations. The aim of this study was to assess the roach diet after large-scale...
Background. Turkey is one of the major European seed producers of European sea bass, Dicentrarchus labrax (Linnaeus, 1758), and gilthead sea bream Sparus aurata Linnaeus, 1758. Determination of susceptibility to viral haemorrhagic septicaemia (VHS), a notifiable disease in Europe, is crucial particularly for sea bass and sea bream seed production to develop control measures and to take necessary actions...
Additional records of four fish species are reported from the Adriatic Sea are reported: Atlantic tripletail, Lobotes surinamensis (Bloch, 1790) (Perciformes: Lobotidae); blue runner, Caranx crysos (Mitchill, 1815) (Perciformes: Carangidae); fangtooth moray, Enchelycore anatina (Lowe, 1838) (Anguilliformes: Muraenidae); and silver-cheeked toadfish, Lagocephalus sceleratus (Gmelin, 1789) (Tetraodontiformes:...
Background. The aquaculture industry is driven by the need to develop novel interspecific hybrids with improved culture characteristics, however currently no molecular markers are available for the validation of F1 hybrids in the case of groupers. The presently reported study was directed toward the development of molecular markers for F1 hybrids obtained by artificial spawning of eggs derived from...
Background. Two North American fish species have been particularly successful in Iberian reservoirs, the largemouth black bass, Micropterus salmoides (Lacepède, 1802) and the pumpkinseed, Lepomis gibbosus (Linnaeus, 1758), but information on their ecology is still scarce, limiting their effective management and control. To increase the knowledge about the ecological mechanisms underlying bass and...
Background. In taxonomic studies of fish, the use of preserved samples has been a common practice. Under the framework of morphometrics, the effect of the preservation techniques on body shape is rarely taken into account. Changes during preservation can cause errors in the results, which may eventually lead to wrong conclusions. To explore the effect of a traditional preservation procedure, we quantified...
Background. Introduction of the common carp, Cyprinus carpio Linnaeus, 1758, may cause a cascade of alterations in trophic webs, among other negative effects, indirectly due to its feeding behaviour. A simplified model site, covenient for studying such interrelations is Lago de Pátzcuaro, México, a shallow lake where carp was first introduced in 1974. The aim of our study was to characterize diet...
Background. The Neotropical genus Austrolebias is the most diverse of the Rivulidae family, with 22 species recorded in Brazil, with 21 found in the state of Rio Grande do Sul. Austrolebias quirogai Loureiro, Duarte et Zarucki, 2011 is an annual fish previously only found in Uruguay and there is currently no information about their ecology and life history. Here, we recorded A. quirogai for the first...
We present length–weight relations (LWR) and use rapid, low-cost histological methods to describe the reproductive biology of the red-bellied fusilier, Caesio cuning (Bloch, 1791), and the longfin emperor, Lethrinus erythropterus Valenciennes, 1830, based on 137 and 139 specimens, respectively, collected from a remote area in Papua New Guinea. The LWR for C. cuning is W = 0.0208FL3.0322. We estimate...
Background. Dawkinsia tambraparniei (Silas, 1954) is confined to an area not exceeding 100 km2 within a single watershed—the Tamiraparani River, southern Western Ghats, India. Its populations have recently declined, earning the fish the endangered status. For effective conservation efforts it is important to determine the levels of genetic variation between different populations. Therefore we attempted...
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