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Number of results: 36
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Abstract

Placoderms are the iconic prehistoric fish from the Devonian. Recent 3D scans have revealed their astonishing anatomical similarities with us humans.
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Keywords Antarctic fishes

Abstract

During austral summer of 1979 in the area of Elephant Island ten species of fish representatives of five families, were identified.
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Keywords Antarctic fish

Abstract

The shelf fishing grounds of Kerguelen Islands and of some neighbouring ocean shallows were studied in April 1975. The occurrence of 15 species representing 9 families was found in the catches. Detailed study of the following five species was performed: Champsocephalus gunnari, Channichthys rhinoceratus, Notothenia rossi rossi, N. squamifrons and Dissostichus eleginoides, all of potential commercial importance. The boundaries of regions with concentrations of Ch. gunnari and N. squamifrons were determined, the productive and suitable for trawling fishing grounds were localized.
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Abstract

226 papers by Polish authors and co-authors have been collected. They deal with Antarctic or sub-Antarctic fishes and also their parasites. The majority (35.7%) of the publications discuss fish biology including growth, age, maturity, feeding and occurrence of particular species in the area. Fewer papers are devoted to parasitology (26.0%). Papers dealing with fish biomass and exploitation make up 18.5%. Papers dealing with morphology and systematics make up 6.6%. The remaining papers are devoted to technology, physiology, palaeontology and others.
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Abstract

24 species of 8 fish families were found to occur on the shelf of Elephant Island during austral spring and summer of 1986/87 season. Notothenia gibberifrons was a predominant species (78—83% per catch). The presence of Champsocephalus gunnari and Chaenocephalus aceratus (15—20% per catch) almost completed fish composition profile. A pronounced decrease of Notothenia rossi (0.03—0.04% per catch) was noticed. Some specimens of Champsocephalus gunnari were characterized by a spawning-time shifted by almost half a year comparing to the remaining part of its population.
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Abstract

Blood of 71 specimens of Notothenia rossii marmorata and 61 specimens of Notothenia neglecta from the region of Admiralty Bay (King George Island) was examined. The number of erythrocytes and hemoglobin content were higher in the blood of N. neglecta. The number of erythrocytes and hemoglobin content were similar in males and females of both species. Considerable differences were noted between individual specimens.
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Abstract

From July to October 1977, during the polar winter and at the beginning of spring, line-fishing was carried out at Admiralty Bay, near the Arctowski Station on King George Island, (South Shetland Islands). At that time only three species of fish were caught: Notothenia rossi marmorata, Notothenia coriiceps neglecta and Trematomus newnesi. Fish was caught in the irshore zone at depths ranging from 2 to 40—60 m.
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Abstract

The paper comprises the review of all known species of cestodes parasitizing the Antarctic and Subantarctic fishes along with synonyms and keys based on morphological features. Also, the review of larval forms of cestodes occurring in bony fishes and provisional identification of them with adult forms is given. In total, 11 valid species (and 3 unnamed forms) of the order Tetraphyllidea and Diphyllidea occur in skates, whereas 3 species of the order Pseudophyllidea were reported from bony fishes. Six morphological forms of larvae, 5 belonging to the Tetraphyllidea and one to the family Tetrabothriidae as well as undetermined plerocercoids of Diphyllobothriidae were recognized.
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Abstract

During the SIBEX1' programme in December 1983/January 1984, 27 hauls were made from the "Profesor Siedlecki" with a 368 — mesh midwater sampling trwal. A total of 13 fish species at postlarval or juvenile stages was found in the catches. The greatest aboundance and species diversity of juvenile ichthyofauna was observed within shelf waters of the Peninsula. Postlarval and juvenile Pleuragramma antarcticum was the most common and most aboundant species there.
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Abstract

During marine ecological surveys conducted by Polish expeditions in South Spitsbergen area 14 fish species were collected. The length frequency, the diet and some other ecological informations are presented for the most common species.
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Abstract

Fatty acids are very important biological substances due to their metabolic, structural and signal- ing functions. Omega-3 has different beneficial, harmful and neutral effects on adipokines. Adi- pokines have autocrine, paracrine and endocrine effects on metabolism. In the study 54 German Fawn x Hair crossbred goats were synchronized using intravaginal sponges. During the first pe- riod (mating-75 days), all animals were fed a diet supplemented with protected fat and during the second period of pregnancy (76 days-kidding), one of the groups was fed a diet supplemented with fish oil and other was fed a diet supplemented with protected fat. Serum leptin, ghrelin, adi- ponektin and omentin levels were measured by ELISA system. Distributed fed (roughage and concentrate) were sampled and dry matter, crude protein, fat, and ash were determined by AOAC (1988) analysis methods. The Acid Detergent Fiber (ADF) and Neutral Detergent Fiber (NDF) analysis were conducted using heat stable α-amylase and sodium sulphite. Fat source (fish oil or protected fat) affected feed consumption and the highest feed consumption was found in the group fed with protected oil first half of the pregnancy and with fish oil in the second half of the pregnancy and in the fish oil group during the pregnancy. It was determined that the use of fish oil during pregnancy did not affect ghrelin, leptin and omentin concentrations in serum. Adipokine levels of fish oil fed animals during any period of pregnancy were found to be high and it was also found that serum adiponectin levels in goats fed with diet containing fish oil in the first half of pregnancy and protected fat in the second half were statistically significantly high in adipokines.
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Abstract

Remains of decapod crustaceans of the family Alpheidae Rafinesque, 1815 and bony fish of the family Gobiidae Bonaparte, 1832 co-occur at a number of localities in the Korytnica Basin (Holy Cross Mountains) and in a newly exposed section along a stream near Niskowa (Outer Carpathians), both in southern Poland. These remains (alpheid major right-sided cheliped tips and gobiid otoliths) are interpreted as documenting a commensal partnership that existed in the shallowest zones of the middle Miocene Fore-Carpathian Basin in southern Poland under environmental conditions that must have been comparable to those of the present-day tropical/ subtropical Indo-West Pacific and Caribbean.
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Abstract

104 specimens of notothenioid fishes of five species (Patagonotothen longipes, P. tessellata, Champsocephalus esox, Cottoperca trigloides and Patagonotothen brevicauda) caught at two sites in the Beagle Channel (Magellanic sub-region, sub-Antarctica) were examined for the presence of thorny-headed worms (Acanthocephala). Representatives of three fish species, Patagonotothen longipes, P. tessellata, and Champsocephalus esox, were infected. Fishes caught at the eastern mouth of the channel were infected with 180 echinorhynchids representing three species, Aspersentis johni (the most numerous species), Heterosentis heteracanthus, and Hypoechinorhynchus magellanicus, and only 12 cystacanths of four polymorphids, Andracantha baylisi, Corynosoma sp., Corynosoma beaglense, and Corynosoma evae. Patagonotothen longipes was the most highly infected in the eastern mouth of the channel (prevalence 85%, maximum intensity 26). Aspersentis johni was the dominant parasite species in this host (prevalence 85%, mean abundance 4.00, maximum intensity 18) and H. heteracanthus was the sub-dominant one (prevalence 50%, mean abundance 2.60, maximum intensity 25). The infections of C. esox were the most diverse (six parasite species - three echinorhynchids and three polymorphids). Fish caught near the city of Ushuaia were infected only with six cystacanths of C. evae (intensity one). Taking into account the whole sample, C. evae was the most abundant polymorphid, represented by 10 of 18 specimens found. Three species, H. heteracanthus, A. baylisi and C. evae, have been previously reported from the low western Antarctic (H. heteracanthus also from the Kerguelen sub-region of sub-Antarctic), remaining four species seem to be endemics of the Magellanic sub-region of sub-Antarctic.
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Abstract

The aim of this study was to assess the anisakid nematode distribution pattern in the fish collected from the South Shetland Islands . A total of 32 fish species were examined for the presence of nematodes in 1978, 1979, 1981 and 2007/2008. The fish were caught off the South Shetland Islands ( Elephant Island , Shishkov Island and in Admiralty Bay – King George Island ). Three genera of L3 larval nematodes were identified: Anisakis sp., Contracaecum spp. and Pseudoterranova decipiens. The infection level was higher on the shelf around the islands than in Admiralty Bay . This is explained by a higher abundance of the final hosts in the region. A comparison of the infection data from 1978/79 and 2007/2008 with data from 1994/96 (Palm et al. 1998, 2007) was done. The parameters of infection of Notothenia coriiceps and Lepidonotothen nudifrons by Pseudoterranova decipiens were decreasing within the 30 years period.
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Abstract

Polish exploration and exploitation of marine resources of Antarctic waters date back to the reconnaissance cruise of the Sea Fisheries Institutes (SFI) r/v Profesor Siedlecki in 1974. Since 1975, a co-operation between the Institute of Ecology, Polish Academy of Sciences (PAS) at Dziekanów Leśny and SFI in Gdynia with participation of the University of Agriculture in Szczecin, Faculty Marine Fisheries and Food Technology (UA) was established. Fishing fleets of the Polish Deep-Sea Fisheries Companies Odra, Dalmor and Gryf, since 1976 were operating in the Atlantic sector of Antarctic waters, south of the convergence.
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Abstract

A total of 704 fishes representing 39 species were examined. Twenty five digenean species were recognized. Only one species previously found by the present author in a fiord of this area was absent in the material. Pelagic species were usually not parasitized by digeneans, while demersal fishes were normally found to be infected. Results of the present study are compared to those from fiords. Seven species were found to be widely distributed. Two of them, Macvicaria pennelli and Genolinea bowersi, were associated with an inshore fiord environment and could be used as biological tags indicating the association of hosts with this kind of environment. Three of widely distributed species, Lepidapedon garrardi, Elytrophalloides oatesi and Lecilhaster macrocotyle, were not clearly associated with any environment. Gonocerca phycidis, Neolebouria antarctica and other less widely distributed species, with the exception of Postmonorchis variabilis, were associated with deep part of fiords and/or open sea shelf environment. The level of infection of open sea fish at the South Shetlands was low. Many fish species living at South Georgia were massively infected; the dominant species in this area is E. oatesi, which was rare off the South Shetland Islands. A total of 45 digenean species occurring in the Antarctic fish were listed. Eleven of them were not endemic.
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Abstract

In pelagic catches of the Polish BIOMASS III Expedition 24 fish species belonging to 6 families were encountered. Pleuragramma antarcticum, Electrona antarctica and Protomyctophum bolini dominated in the Bransfield Strait. Pagothenia brachysoma was abundant in the region of Elephant Island. The presence of juvenile Channichthyidae was recorded in this area only in January. In comparison with observations in other seasons an increased frequency of Chaenodraco wilsoni and decreased frequency of Chaenocephalus aceratus was noted.
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Abstract

Thirty four specimens of bony fishes (5 species) and four specimens of skates (2 species) were examined. Skates were infected with adult representatives of Phyllobothrium sp. (Tetraphyllidea) and Macrobothridium sp. (Diphyllidea). Bony fishes were infected with three morphological forms of tetraphyllidean cercoids (with mono- and bilocular bothridia, and bothridia undivided with hook-like projections), diphyllobothrid plerocercoids and one pseudophyllidean species, Bothriocephalus antarcticus sp.n. This species, as well as two species found in skates, seems to be endemic for the Kerguelen subregion.
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Abstract

Observations indicate a constantly decreasing mean age of shoal. In consecutive years of investigations a loss of older individuals was recorded. At present the catches consist of 3—14 years old fishes; 9—10 years old dominate. During the austral summer the fish most probably do not migrate. The shoal of the shelf maintains approximately constant frequency and dominance in classes of length.
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Abstract

The two bathydraconid species, Gymnodraco acuticeps and Cygnodraco mawsoni, caught in the Ross Sea (Antarctic summer 2002) were examined for internal parasites. All specimens (four G. acuticeps and one C. mawsoni) were infected. G. acuticeps harboured larval Cestoda (bilocular tetraphyllidean cercoids, diphyllobothriid plerocercoids) and Nematoda (Contracaecum spp.), acanthocephalan cystacanths and adult helminths (three species of Digenea and one species of Nematoda). Two specimens of C. mawsoni (including data from one additional specimen examined earlier) were infected by larval Cestoda (bilocular cercoid) and Nematoda (Contracaecum spp.) and adult helminths (three species of Digenea and one species of Nematoda). The present data are compared and discussed with the relevant literature data.
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Abstract

Notothenia coriiceps, N.rossii and Lepidonotothen nudifrons were sampled from Admiralty Bay from March to November 1997 and from January to February 1999. The ratio of N.coriiceps to N.rossii individuals in catches regularly increased during 22 years from 0.4 in 1977 to 9.5 in 1999. Oving to its reproductive strategy and avoidance of shallow waters N.rossii may be more vulnerable to overfishing. The condition factor was the most stable (CV 6 -10%), variations in the of hepatosomatic index and index of stomach fullness were intermediate (21 -38%and 40 -43%,respectively), and the gonadosomatic index was the most variable (65 -100%). Lack of seasonality in two somatic indices (condition factor and index of stomach fullness) in N.coriiceps adults is a direct effect of high food availability and unlimited food detection all year round. In contrast, the seasonality of a reproductive index (gonadosomatic index) of these fish is a response to the highly seasonal trophic conditions for pelagic larvae.
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Abstract

The aim of the article is to compare the thought collective and the interpretive community, two surprisingly similar notions formulated independently by Ludwik Fleck and Stanley Fish. In contemporary discourse, both concepts are used as synonims, while an accurate analysis of the contexts of the use of interesting terms proves that the equivalent of the interpretive community is rather thought collective, as well as the thought style, both of these concepts in the deliberations of Fish are subject to contamination. The exact repartition of the notion of interpretive community seems to be important due to the frequency of its use in works in the field of literary interpretation and cognition. The article also presents more general remarks on the functioning and possible origin of twin terms and their role in scientific cognition.
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