Robert A. Patzner

University of Salzburg · Department of Ecology and Evolution

Fishes in marine caves have attracted limited attention by the scientific community in comparison to subterranean fishes which have lost eyes and pigmentation. They constitute a largely unexplored component of marine fish diversity, except for the relatively well-studied marine caves of the Mediterranean Sea. These habitats are characterized by ste...

This issue 11 of ARIANTA has once again succeeded in presen�ting a colorful mixture of malacological topics. We would like to thank the authors of the texts and illustrations as well as the reviewers for their efforts and commitment. The fact that our journal and its topics are not only frequented by mollusc ex�perts is also shown by the contrib...

Journal of MoFA (Mollusc Research Austria)

Citation: Kovačić, M.; Renoult, J.P.; Pillon, R.; Bilecenoglu, M.; Tiralongo, F.; Bogorodsky, S.V.; Engin, S.; Kovtun, O.; Louisy, P.; Patzner, R.A.; et al. Abstract: After the description of Gobius incognitus Kovačić & Šanda, 2016, all previous knowledge about the geographic distribution of Gobius bucchichi Steindachner, 1870, as well as its ecolo...

Scientific Journal of Mollusc Research Austria

In October 2020, two specimens of Deroceras agreste were collected in the area of Bad Gastein (province of Salzburg). The species identification could be confirmed by genital dissection. This is the first confirmed record of this species for the province of Salzburg.

The Biodiversity Database of the Hohe Tauern National Park, a cooperation project between the National Park and the Salzburg Haus der Natur, was initiated in 2002. The objective was and still is to create as comprehensive a natural area inventory of the Hohe Tauern National Park as possible by mobilizing existing data (from collections, research pr...

ARIANTA is the journal of Mollusc research Austria (MoFA). Volume 8 contains 5 scientific articles and one book review.

In a current study, a total of 73 land and six water snail species from 29 families could be identified on the four Salzburg’s city hills. The most common species was Cochlostoma septemspirale. The results were compared with older literature data to determine possible changes in the species spectrum.

The freshwater water mollusks of the Sperling collection were reviewed and the data were transferred to the biodiversity database of the Haus der Natur Salzburg. A total of 48 snail and 10 mussel species are present in the collection. Most of the evidence originates from the province of Salzburg. The species identification was randomly checked and...

Charpentieria itala (MARTENS, 1824) from the gastropod family Clausiliidae could be discovered alive for the first time in the province of Salzburg, Austria. Specimens were collected and the data were overtaken in the Biodiversity Databank of Salzburg.

The results of the excursion in the Landscape and Plant Protection Area Untersberg, which was held during the 1st Meeting of the Mollusc Research Society Austria (MoFA) in Salzburg, is presented and supplemented by data from a preliminary excursion in 2018. Altogether, 47 terrestrial and six aquatic mollusc species were detected at four sites.

Arianta 7 is the first volume of Arianta published in form of the Society Journal of MoFA (Mollusc Research Austria). Arianta was first published in 1995 as a booklet containing the documentation of a Workshop on Alpine land snails which had taken place in July 1994 in Johnsbach, Styria. It was followed by five more issues which were irregularly pu...

The present study reports the first record of two gobiid fish, Odondebuenia balearica (Pellegrin & Fage, 1907) and Vanneaugobius dollfusi (Brownell, 1978), in the Strait of Sicily. Two females (23.1 and 33.9 mm TL, respectively) were sampled on the Terrible Bank at 48 and 55 meters depth, respectively. The soft bottom, previously investigated by me...

Peter Sperling’s collection is housed at the Haus der Natur since spring 2017. These are mainly terrestrial gastropods from the province of Salzburg. In addition, there are terrestrial gastropods from other Austrian provinces and from neighbouring countries. About 5 to 6 % of the collection are water mollusks with the same geographical distribution...

Beitrag zur Molluskenfauna (Gastropoda und Bivalvia) des Bundeslandes Salzburg, Österreich mit besonderer Berücksichtigung der Vertigo-Arten R. TRAVNITZKY & R.A. PATZNER A b s t r a c t : In a study on 15 EC Habitats in Salzburg, Austria, a total of 68 species were found. According to the Red List of Endangered Species 55 species are listed as "Lea...

Two Hygromiidae species, Monacha cartusiana and Hygromia cinctella, could be discovered alive for the first time in the province of Salzburg. Specimens were collected and the data were overtaken in the Biodiversity Databank of Salzburg.

A collection of mainly terrestrial mollusks from the city of Salzburg and its surrounding was investigated and overtaken in the Biodiversity Databank of Salzburg. 300 data sets from 40 gastropod and 2 bivalve species were registered.

Ökologie der Großmuscheln in den Stauseen am unteren Inn In den Flussstauseen am unteren Inn im bayerisch-österreichischen Grenzgebiet leben die drei heimischen Großmuschelarten Anodonta anatina, A. cygnea, Unio pictorum und seit einigen Jahren auch Sinanodonta woodiana, die aus Asien eingeschleppt wurde. In einem für den unteren Inn ganz typischen...

Installation with a closed water system for the breeding of the noble crayfish (Astacus astacus). A suitable and stable indoor breeding arrangement for the cultivation of the noble crayfish under controlled laboratory conditions is described. It consists of 3 basins, which are connected to each other. Two external filter pumps generate a water circ...

Cryptobenthic fish communities are a rarely studied and ill-defined component of the marine benthos. Quantitative sampling of seventy-six 1 × 1 m plots at Cape Šilo, Northern Adriatic Sea, yielded 522 cryptobenthic and 67 epibenthic individuals of 27 species. Canonical Correspondence Analysis (CCA) identified variation of 3 out of 17 habitat variab...

Oral and pharyngeal dentition was analysed in eight Mediterranean species of five different genera using scanning electron microscopy (SEM). Number, position, shape and size of teeth in the jaws and the pharyngeal tooth plates were used as a basis for comparison among taxa. Three different groups could be established based on the dental morphology...

Nine shrimp-goby species (Amblyeleotris steinitzi, A. sungami, Cryptocentrus caeruleopunctatu0, C. cryptocentrus, C. lutheri, Ctenogobiops maculosus, Lotilia graciliosa, Tomiyamichthys latruncularius, Vanderhorstia delagoae) were found at the fringing reefs around Dahab and in Nabq National Park, Egypt. Abundances vary, depending on the size of the...

Teleost gonad morphology, at the anatomical, histological and fine structural levels, has long been studied with the aim of identifying annual reproductive cycles, the length of breeding seasons, the onset of reproductive maturity, spawning rhythms, fecundity and various other aspects of reproductive biology, or to be used in phylogenetic systemati...

Summary Tu’ini, Capoeta damascina, is a widespread species in the interior basins of Iran. To examine the morphometric variations residing within the taxon, six isolated river systems from the west, south, southwest, and centre of Iran were investigated: Ghárásu, Hánnã, Bãzoft, Eghlid, Ãbãdeh, and Gãmãsiyãb. A total of 240 adult fish specimens ≥180...

The present review covers all currently known marine and brackishwater gobies in the eastern part of the amphiatlantic Temperate North Atlantic realm sensu Spalding et al. (2007) i.e. in its four eastern provinces: the Northern European Seas, the Lusitanian, the Mediterranean and the Black Sea. The data includes African coast to the Cape Vert penin...

Among all vertebrates, gobies are second in diversity only to the teleost family Cyprinidae. The Gobiidae consists of more than 200 genera and nearly 2,000 species and make up the largest family of marine fishes. Gobies account for as much as 50% of the energy flow in coral reef communities. Their small size, ability to adapt to numerous ecological...

In Curacao (Netherland Antilles, Caribbean Sea), two species of gobies, Nes longus (N. longus) (Nichols 1914) and Ctenogobius saepepallens (C. saepepallens) (Gilbert & Randall 1968) with their associated shrimp Alpheus floridanus (A. floridanus) (Kingsley 1878) were observed. Data were collected on feeding behaviour, distances from their burrows, a...

This study established the first protocol for collection of gametes from live axolotl, Ambystoma mexicanum, by gentle abdominal massage and in vitro fertilization. To stimulate spermiation and ovulation, human chorionic gonadotrophin (hCG) and Ovopel pellets, which are commercially used to stimulate spawning in fish, were tested. The hCG was more e...

Motility and cryopreservation of testicular sperm of European common frog, Rana temporaria were investigated. Collected testicular spermatozoa were immotile in solutions of high osmolalities: 300 mmol/l sucrose and motility inhibiting saline solution-MIS. Full sperm motility could be activated in distilled water or in a solution of 50 mmol/l NaCl,...

The vascular patterns of the epidermally derived slime glands of the Atlantic hagfish, Myxine glutinosa, and of the Pacific hagfish, Eptatretus stouti, have been studied by scanning electron microscopy of vascular corrosion casts. In Myxine a simple two-dimensional vascular network sheaths the slime glands, while in Eptatretus there is also a great...

Concentrations of estrogens in the plasma of Myxine glutinosa were measured in an attempt to determine whether different stages of reproduction are connected with certain levels of steroid concentration. After extraction with diethylether and column chromatography on Sephadex LH-20, the plasma was radioimmunoassayed for estrogens. Samples were subd...

Abstract The development of eggs and the degeneration of ovulated follicles in Eptatretus burgeri was studied over a period of one year. It was found that small resting eggs with a diameter of about 1.5 mm continue to grow in November. By the spawning season in October of the following year, the follicles attain a length of about 24 mm. Only one fe...

Scanning and transmission electron microscopic investigations of the epidermal surface cells, the small mucous cells, of Myxine glutinosa reveal specific structural differentiations in the form of vertical apical channels with microvilli and supporting tonofilament skeleton. The functional significance of these surface differentiations with regard...

The fine structural organization and dimensions of spermatozoa from species of 4 subfamilies of the Cyprinidae (Barbus barbus, Carassius carassius, Cyprinus carpio carpio, Cyprinus carpio haematopterus, Abramis brama, Alburnoides bipunctatus, Alburnus alburnus, Chalcalburnus chalcoides mento, Chondrostoma nasus, Hypophthalmichthys molitrix, Leucisc...

Siah Mahi, Capoeta capoeta gracilis, is a predominant fish in the river systems of the south Caspian Sea basin. Although there is evidence of the geographical divergence of this taxon, no information is available on morphological differences within the subspecies populations. The study was designed to evaluate this differentiation in the Shirud Riv...

Cryopreservation of testicular sperm in the African clawed frog, Xenopus laevis, was tested using three penetrating cryoprotectants (DMSO, methanol, and glycerol) and three semen diluents (300 mmol/L glucose, 300 mmol/L sucrose, and a motility inhibiting saline [MIS] solution [150 mmol/L NaCl, 3 mmol/L KCL, 1 mmol/L Mg(2)SO(4), 1 mmol/L CaCl(2), an...

Using scanning electron microscopy (SEM) the upper and lower jaw and for the first time the pharyngeal jaw apparatus were described in Coryphopterus dicrus (Böhlke & Robins, 1960), C. eidolon (Böhlke & Robins, 1960) C. thrix (Böhlke & Robins, 1960) C. tortugae (Jordan, 1904), C. venezuelae (Cervigón, 1966) and Gnatholepis thompsoni (Jordan, 1904)....

Réidentification de spécimens de Buenia (Gobiidae) en provenance de Banyuls-sur-Mer (France, Méditerranée orienta-le). Des spécimens identifiés comme Buenia jeffreysii (Günther, 1867) provenant de la collection du Zoologisches Museum, Ham-burg, ont été examinés. Ces spécimens ont été capturés à Banyuls-sur-Mer (France, mer Méditerranée occidentale)...

The testes and associated accessory organs of two blenniid fishes are described. The testicular organs of Salarias fasciatus consist of a testicular gland adjacent to the testis, chambered seminal vesicles serving as a reservoir for spermatozoa and testicular blind ouches. Ecsenirts bicolor has no testicular gland, has elongated chambered seminal v...

Sand dwelling species of Coryphopterus live in shared habitats and were reported to have a similar ecology. Species lineages within the western Atlantic Coryphopterus have recently been reconciled; fish which according to the common keys had formerly been identified as Coryphopterus glaucofraenum could in fact be C. glaucofraenum, C. tortugae or C....

The coastal marine waters surrounding North and South America have long been recognised as biogeographically distinct. While most biogeographers have traditionally considered tropical and temperate marine waters separately (e.g., Ekman, 1953; Briggs, 1974), this analysis explores the diversity and distributions of both tropical and temperate blenni...

Using scanning electron microscopy (SEM) the upper and lower jaw and for the first time the pharyngeal jaw apparatus were described in Coryphopterus dicrus (Böhlke & Robins, 1960), C. eidolon (Böhlke & Robins, 1960) C. thrix (Böhlke & Robins, 1960) C. tortugae (Jordan, 1904), C. venezuelae (Cervigón, 1966) and Gnatholepis thompsoni (Jordan, 1904)....

Background. Morphology of eggs and embryonic development of the genus Coryphopterus are documented for the first time. The species C. venezuelae, C. dicrus, C. eidolon, and C. thrix have been found to have a similar ecology, but details about their reproduction are still unclear. The aim of the present study was to investigate if egg morphology, mo...

Eggs of the Eurasian perch, Perca fluviatilis, are strongly attached to each other to form 0.5-5.5m long and 1-6 cm wide floating jelly strands or ribbons. The processes involved in the initiation of egg attachment were investigated in the present study. Eggs are released together with small amounts of ovarian fluid. When the eggs come in contact w...

Fürböck, S., Patzner, R.A. and Lahnsteiner, F. 2008. Fine structure of spermatozoa of Chondrostoma nasus and Rutilus meidingerii (Teleostei, Cyprinidae), as revealed by scanning and transmission electron microscopy. — Acta Zoologica (Stockholm) 91: 88–95 The fine structure of spermatozoa of sneep or nase, Chondrostoma nasus, and lake chub, Rutilus...

The properties and behaviour of common carp, Cyprinus carpio, eggs in water and in ovarian fluids were studied at different temperature, pH, and with divalent cation concentrations. The biochemical composition of zona radiata externa (ZRE) was analyzed qualitatively and quantitatively on amino acids, carbohydrates, uronic acid and sialic acids usin...

Using the cryopreservation method of Lahnsteiner, Berger, Weismann & Patzner (1995, Aquaculture Research26, 801-807) the influence of allowable variations of methodical parameters (storage of semen before cryopreservation, dilution ratios in the extender, equilibration in the extender, cooling rates, storage of deep-frozen semen in liquid nitrogen,...

For salmonid semen, the cryoprotective action of 10% methanol was compared with a 5% dimethyl sulphoxide (DMSO), 1% glycerol mixture, until now one of the most effective cryoprotectants. In Oncorhynchus mykiss (Walbaum), Salmo trutta L. f. fario, Salmo trutta L. f. lacustris and Salvelinus alpinus (L.), semen cryopreserved with both cryoprotectants...

The present study describes a uniform method for cryopreservation of semen of Salmonidae (Oncorhynchus mykiss (Walbaum), Salmo trutta f. fario L., Salmo trutta f. lacustris L., Coregonus sp.). It presents a new type of extender and experiments demonstrating that warming of frozen/thawed semen to 20°C prior to fertilization significantly increases t...

Amphiprion clarkii and A. nigripes were found in coral reefs of three different atolls in the Maldives. A. clarkii was associated with five species of host anemones, but A. nigripes was only found in Heteractis magnifica. In few cases, both anemonefishes have utilized the same individual of H. magnifica. There was no significant correlation between...

The relationship between Inachus phalangium and Anemonia sulcata was investigated in situ. Periodical controls of Anemonia harbouring Inachus revealed that less than half of the crabs remained in their Anemonia whereas the others disappeared. All crabs removed and released returned to Anemonia indicating a clear preference for this species of actin...

Sensory buds of different sizes have been found in the epidermis from the barbels of Myxine glutinosa. The electron microscopic investigations reveal their composition as one type of receptor cells and two types of supporting cells. The receptor cells have apical stereocilia with filamentous internal structure and there are microvilli on the suppor...

An overview of the biology, habits and reproduction of the pikeperch (Sander lucioperca) is given. The eggs were studied by scanning electron microscopy. They have in non-swollen state a diameter of 0,6 to 1,3 mm and in swollen state 0,8 to 1,7 mm. They are very sticky, which is caused by special substance. This attaching-substance mostly covers th...

An overview of the biology, habits and reproduction of the grayling (Thymallus thymallus) is given. The eggs were studied by scanning electron microscopy. They have in non-swollen state a diameter of 1.5 to 3.2 mm and in swollen state 2.0 to 4.1 mm. They are not sticky. The zona radiata measures between 40 and 50 µm. The micropyle consists of a hug...

In the eggs of the brown trout, Salmo trutta fario, lipid droplets are clearly visible beneath the oolemma on the surface of the protein yolk. When examining the distribution of lipid vesicles in egg batches of different quality, four categories of lipid vesicle distribution could be distinguished: In the first category, the lipid droplets were eve...

Cave diving expeditions were conducted in the Golfo di Orosei in June/July 2003 and July 2004. The main site of the exploration was located 500 m north of Cala Sisine (Fig. 1). The cave system of Grotta del Bel Torrente is one of the biggest in Sardegna. To date, a total of more than 2.5 km dry and water-filled passages have been surveyed. A map of...

Sperm motility and composition of the seminal fluid in Lota lota were investigated. Fives after motility initiation, 88.2 ± 12.4% of the spermatozoa were motile, their mean average path swimming velocity was 61.6 ± 16.3 μm s−1 and their principal swimming type the linear motion (77.4 ± 20.9%). In distilled water the rate of motile spermatozoa decre...

The influence of permeating and of non-permeating cryoprotectants on motility, eosin permeability (sperm cells viability test) and leaking lactate dehydrogenase activity of spermatozoa of the rainbow trout (Oncorhynchus mykiss) was investigated. Correlations between sperm motility rate, percentage of eosinimpermeable (viable) cells and LDH activiti...

This paper reports a new record of Didogobius schlieweni in the Ligurian Sea (Italy). Ecological data of all previous findings and the distribution of this species in the Mediterranean Sea are presented.

Abstract – Stock density indices are numerical population descriptors derived from length-frequency data and has been mostly applied to North American sport fish populations to define the structure of the population. Traditional relative-stock-density and proportional-stock-density-indices were applied to Arctic charr, Salvelinus alpinus (L.) popul...

In the framework of several field excursions to the Balearic Island of Ibiza (Western Mediterranean Sea) conducted every spring and autumn between 1998 and 2007, extensive studies were carried out on the structure, diversity and ecology of the coastal ichthyofauna. The ichthyofaunistic observations were made in the months of March, April, September...

Osteological examinations of the two gobiid species Gobius fallax and the recently described colour morph of G. auratus from the northern Adriatic Sea revealed interspecific conformity in most features. These closely related species only show slight trends of osteological differentiation; clear discriminating features were hardly determined also du...

The testicular gland (t.g.) is a glandular tissue situated adjacent to the testis of blenniid and several gobiid species. In the present study the t.g. of Blennius pavo Risso and Gobius niger L. were compared by histological and histochemical methods. In B. pavo the spermatozoa have to cross the t.g. to reach the vas deferens and thus they come int...

The habitat characteristics and spatial segregation of the two common gobies Gobius fallax Sarato, 1889 and Gobius auratus Risso, 1810 were investigated by fish frequency and abundance estimates through visual counts in the northern Adriatic Sea. The latter species is represented by a recently described, unusual colour morph in the northern Adriati...

Decoration preferences, position, structure and morphology of the hooked setae were questions addressed in this study. Data were collected through the use of a scanning electron microscope. The location of the hooked setae on the exoskeleton was mapped. Spider crabs (family Majida e) often decorate themselves. They put pieces of marine organisms am...

Daily movements in a population of the spider crab Maja crispata were studied in the northern Adriatic Sea. The sex ratio of males to females was 3:2, with males reaching a maximum carapace length of 91 mm and females a maximum of 74 mm. M. crispata was most abundant on the bottom of the boulder field than in any other habitat. The seven studied sp...

The host plants of chrysomelids are mentioned in many identification keys and faunal lists, but their records are often incomplete or incorrect. To find out the definite host plant of a definite species in a definite area, feeding choice experiments have been carried out with 14 Chrysomelidae species from a prospective nature reserve in Upper Austr...

The sexual differentiation of Salaria (=Blennius) pavo is described from the stage of hatching to a body length of 35 mm. At hatching, the primordial germ cells (PGCs) can be recognized clearly. At a standard body length of 5 mm, they begin to protrude into the peritoneal cavity and at 14 mm they transform to oogonia. At 17 mm length, the first ooc...

When motility of spermatozoa of Cottos gobio was initiated with distilled water, the motility rate decreased to 0% within 1 min, and significant signs of osmotic alterations were observed at the end of the motility period. By contrast, in 50 mmol 1−1 NaCl solution, the motility rate persisted for 120–140 min. In both distilled water and in 50 mmol...

The composition of the organic compounds of the seminal fluid, pH values and osmolalities were investigated in three cyprinid species, the bleak (Alburnus alburnus), the chub (Leuciscus cephalus) and the zaehrte (Vimba vimba). The seminal fluid contains monosaccharides (glucose, fructose, galactose, xylose), lipids (cholesterol, fatty acids, phosph...

Alburnus alburnus, Leuciscus cephalus and Vimba vimba efferent duct systems of the male gonads consist of testicular main ducts and spermatic ducts. These have similar histological, fine structural and (enzyme–) histochemical characteristics and function in (1) storage and (2) nutrition of spermatozoa, (3) synthesis of steroid glucuronides, (4) sec...

The testicular blind pouches (TBPs) of Lipophrys canevae and Solaria pavo have an annual reproductive cycle with an active secretion phase during spawning, a regression phase correlated with necrotic processes during post-spawning, an inactive regeneration phase during inter-spawning and prespawning. As revealed by fine structure and enzyme-histoch...

The spermatozoon of the African catfish Clarias gariepinus is a simple organized aquasperm although it reveals very unique characteristics: the cytoplasmic channel is lacking, the mitochondria form a complex structure and the arrangement of the centriolar complex is species specific. Semen has high initial motility rates (c. 70–90%) and swimming ve...

The spermatozoon of Siganus rivulatus is symmetrical in its longitudinal axis, has no acrosome, an almost spherical nucleus, a small mid-piece with six mitochondria, centrioles arranged at an acute angle to each other, no nuclear fossa, and a flagellum without fins. Sperm motility is reversibly inhibited in the seminal plasma, and in electrolyte an...

The spermatozoa of Boops boops, Diplodus sargus, Mullus barbatus, and Trachurus mediterraneus were motile in sea water, and in electrolyte solutions (NaCl) and non-electrolyte solutions (glucose) with an osmolality of 600–1000 mosmol kg−1. Their mean motility rate 10 s after initiation was about 80%, while about 10% of the motile spermatozoa moved...

The study focused on two gobiid taxa from the northern Adriatic Sea. External features and coloration suggest identification of one of these with Gobius auratus Risso, 181027. Risso A Ichthyologie de Nice, ou Histoire Naturélle des Poissons du Département des Alpes Maritimes: Gobius auratus sp. n. 1810 Paris Schoell 160 161 View all references. Th...

Mapping of crayfish populations in the province of Salzburg was carried out in the years 2002 and 2003. Five crayfish species were found, two of them native: Astacus astacus and Austropotamobius torrentium, and three foreign: Astacus leptodactylus, Pacifastacus leniusculus and Orconectes limosus. In former times the first two species were widely di...

Decoration preferences, position, structure and morphology of the hooked setae were questions addressed in this study. Data were collected through the use of a scanning electron microscope. The location of the hooked setae on the exoskeleton was mapped. Spider crabs (family Majidae) often decorate themselves. They put pieces of marine organisms amo...

The seminal vesicle secretion (SVS) of the African catfish, Clarias gariepinus, was investigated by analytical and experimental methods. SVS consists mainly of proteins and glycoproteins which are responsible for its viscous and sticky nature. The secretion contains also high activities of acid phosphatase, alkaline phosphatase, and proteases. Thes...

Mediterranean anemones living together with plants and animals are listed. These associations include mutualism, commensalism, and parasitism. Among 52 species of Mediterranean anemones 22 are associated with other organisms.

Fascioliasis by Fasciola hepatica is the vector-borne disease presenting the widest latitudinal, longitudinal and altitudinal distribution known. F. hepatica shows a great adaptation power to new environmental conditions which is the consequence of its own capacities together with the adaptation and colonization abilities of its specific vector hos...

The relative weight of fish eggs increases during water hardening; this increase is significantly correlated with egg viability in rainbow trout when determined after 120 min, providing an assay test for egg quality control. In the present paper, additional investigations on egg water uptake at different time intervals during the hardening process...

The life habits and microhabitat selection of speleophilic gobiid fishes were investigated on the Balearic Island of Ibiza (western Mediterranean Sea). Corcyrogobius liechtensteini (Kolombatović, 1891) was the most frequent species within submarine crevices, cavities and caves. Didogobius splechtnaiAhnelt & Patzner, 1995 co-occurred with C. liechte...

Freshwater snails of the family Lymnaeidae are of a great parasitological importance because of the very numerous helminth species they transmit, mainly trematodiases of large medical and veterinary impact. The present knowledge on the genetics of lymnaeids and on their parasite-host inter-relationships is far from being sufficient. The family is i...

This study addresses the habitat and microhabitat of the seven species of gobiesocid fish in the Mediterranean Sea. It is shown that Lepadogaster lepadogaster is closely adapted to large pebbles and boulder fields of rounded stones with a smooth surface. L. candollei is more euryecious and, in addition to inhabiting boulder fields also, occurs clos...