The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Background. A local stock of pikeperch, Sander lucioperca (Linnaeus, 1758), is a valuable fishery resource in Pärnu Bay, northern Gulf of Riga. Due to the late maturity of pikeperch in the bay, the stock is vulnerable to overexploitation, whereas recruitment is highly dependent on climate factors. Because of its high market price, fishing pressure on the stock increased considerably in the 1990s,...
Background. The characteristic feature of the genus Coregonus is the multitude of nominal species of obscure identity. The northeastern Europe is inhabited by, inter alia—the vendace, Coregonus albula (Linnaeus, 1758)—considered the European cisco—and the least cisco, C. sardinella Valenciennes, 1848—often referred to as the Siberian species. There is a large area in where the ranges of both species...
Background. Endocrine disrupting chemicals (EDCs), among them polychlorinated biphenyls (PCBs), are able to change the hormonal regulation of reproduction at the hypothalamo-pituitary-gonadal (HPG) axis in many vertebrates. The aim of the presently reported study was to determine the effects of highly chlorinated PCBs mixture—Delor 106—on the in vivo and in vitro luteinizing hormone (LH) secretion...
Background. The paternal mouthbrooding Banggai cardinalfish, Pterapogon kauderni Koumans 1933, has an exceptionally restricted endemic range for a marine fish, is traded internationally as a marine ornamental and listed as endangered in the IUCN Red List. This paper aims to contribute to the body of knowledge regarding the biology of this species, based on studies on the endemic population in the...
In this paper, we report the first record of Bermuda sea chub, Kyphosus saltatrix (Linnaeus, 1758) caught off the coast of Benghazi, Libya. Its occurrence adds to the increasing rate of detections of this species in the south of the Mediterranean during the last decade.
Background. The wide availability of specimen-based museum collections allows scientists to address a variety of ecological and systematic hypotheses from a broad timeframe and extensive spatial scale. However, techniques employed to preserve and maintain these collections affect morphology, potentially altering or skewing any morphological comparisons inherent in research study questions. The purpose...
Herring, Clupea harengus L., is an important commercial fish species in the Baltic Sea region since medieval times. The western Baltic spring spawning herring (WBSS) is one of three major Baltic Sea herring stocks, supporting a significant over-regional fishery in the western Baltic Sea as well as in the Kattegat and Skagerrak area. One major component spawns in the vicinity of the German island of...
Background. Probiotics are known as immunostimulants as well as growth and survival promoters in fish, but despite the plethora of studies on the effect of probiotics on the fish non-specific immune responses, very few information is available for ornemental fish. Thus, this study was carried out to investigate the effects of short-term dietary administration of Bacillus probiotics (B. subtilis and...
Background. Hypoxia-inducible factor-1α (HIF-1α), a subunit of the HIF-1 protein, plays a key role in the regulation of genes involved in hypoxia physiological response. Tongue sole, Cynoglossus semilaevis Günther, 1873, a marine teleost, had been proved to be a hypoxia-tolerant species. In this study, the HIF-1α in tongue sole was cloned and its expression under acute hypoxia was examined to provide...
Background. Live seahorses are traded mainly for ornamental markets owing to their unique features whereas dried seahorses are mainly traded for use in traditional Chinese medicines. Increased seahorse trade globally has posed a threat to seahorse populations worldwide. Thailand has been reported to be one of the major seahorse exporter countries, but study on seahorse fisheries and trade is limited...
The capture of a juvenile, male, great white shark, Carcharodon carcharias (Linnaeus, 1758), off the Corsican coast (Mediterranean Sea) in 2012 is reported in this note along with two other new records (1976 and 2011). Additionally, 8 other historical and more recent records from the same area are presented and commented. These records are compared with those reported from more distant areas. Conclusions...
Otoliths are widely used in stomach content analysis because they are one of the last species-specific features to be digested by piscivorous predators and they may be used as an important tool for prey classification. The linear regressions between otolith size (length and height), otolith weight versus fish length and weight of the benthopelagic species, Lampanyctus crocodilus (Risso, 1810), living...
On 2 August 2013, a specimen of the cobia, Rachycentron canadum (Linnaeus, 1766), was caught off Marmaris, south-eastern Aegean coast of Turkey. The fish was examined and morphometric characteristics of the specimen collected were determined. The species is being reported from the second time in the Mediterranean, preceded by its first occurrence off Haifa, Israel in 1978. The newly caught specimen...
The presently reported study provides length–weight relations of 14 fish species from mangrove swamps of La Paz Bay, Baja California Sur, México: Diapterus brevirostris (Sauvage, 1879); Eucinostomus currani Zahuranec, 1980; Eucinostomus dowii (Gill, 1863); Eucinostomus entomelas Zahuranec, 1980; Eucinostomus gracilis (Gill, 1862); Ctenogobius sagittula (Günther, 1862); Haemulopsis nitidus (Steindachner,...
Background. The fishes of the genus Schizothorax, commonly known as snowtrouts, are a group of species that are difficult to distinguish based on external morphological characters. One of them, Schizothorax plagiostomus Heckel, 1838, is a commercially important freshwater fish with wide distribution along the Himalayan foothills. However, recent observations have indicated drastic declines and change...
Background. The Dniprodzerzhynsk reservoir is one of six reservoirs built on the Dnieper River, which currently supports important commercial and recreational fisheries. To date, there are no published data on the reservoir’s non-commercial fish species, among which gobies are considered to be the most abundant and important species. The goal of this work was to contribute to general knowledge on...
The Senegalese sole, Solea senegalensis Kaup, 1858, was recorded for the first time from the southeastern Mediterranean near Tel-Aviv, Israel on 17 May 2013. This eastern Atlantic species is rare in the western Mediterranean, but now also documented from the southeastern Mediterranean.
The knowledge on the effect of different stress factors on Atlantic salmon, Salmo salar Linnaeus, 1758, is far from complete and therefore we decided to find out how the low water level stress could effect pathophysiological parameters such as: plasma cortisol level, haemoglobin, haematocrit, chloride (Cl–), sodium (Na+), osmolality, lactate, and glucose in this fish; and how this stressor affects...
Gammogobius steinitzi Bath, 1971, a goby species endemic to the Mediterranean Sea, was observed for the first time in the Black Sea in marine caves of western Crimea (Tarkhankut, Ukraine). A description of the morphological and ecological characteristics is given on the basis of the analyses of 5 specimens. The morphological and ecological characteristics of the Black Sea specimens do not differ from...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.