The stomach contents of poor cod, Trisopterus minutus capelanus (Lacepe Áde), were taken at month... more The stomach contents of poor cod, Trisopterus minutus capelanus (Lacepe Áde), were taken at monthly intervals off the eastern coast of the Gulf of Valencia (Spain). A total of 1276 were analyzed to determine diet according to fish size and season. The basic food consists of crustaceans (Mysidacea and Decapoda) and teleosts. Feeding habits varied with size: decapods and fishes were more abundant in the stomachs of larger specimens. Little seasonal variation in food habits was recorded. Problem Two subspecies of the poor cod Trisopterus minutus, separated on the basis of morphoanatomical features, exist in the European Sea waters: the Mediterranean poor cod, T. m. capelanus (Lacepe Áde), and the Atlantic poor cod, T. m. minutus (L.) (Svetovidov, 1948). T. m. capelanus is a common gadoid found in the western Mediterranean and eastern Atlantic Ocean off the coast of Morocco, whereas T. m. minutus occurs from Trondheim Fjord to Gibraltar (Whitehead et al., 1989). However, recent genetic analyses (Tirard et al., 1992; Mattiangeli et al., 2000) support the classification of Atlantic and Mediterranean poor cod as distinct taxa and the close relationship between the Mediterranean poor cod and bib Trisopterus luscus (Linnaeus 1758). The feeding habits of T. m. minutus have been studied by various authors (
Testis of the Teleostean fish Trisopterus minutus capelanus has been examined to study the organi... more Testis of the Teleostean fish Trisopterus minutus capelanus has been examined to study the organization of the seminiferous tubules and the ultrastructural features of the germ cells. The testis is shown to be composed of seminiferous tubules full of cells: only few of them have just a very narrow lumen. Each tubule is divided by thin septa of connective tissue in zones containing homogeneous cells; such an organization is confirmed by ultrastructural images showing groups of synchronously developing germ cells. By morphological characterization of the germ cells found in each zone, 6 maturation stages have been identified. During spermiogenesis, a progressive shrinkage of germ cells and a nuclear chromatin condensation have been observed. Intercellular bridges, homogeneously dispersed granules of glycogen and groups of mitochondria associated with dense granular material have been described. Such features are present in the earlier stages of spermiogenesis and are retained until the later stages of spermatid differentiation. The spermatozoon shows a lack of acrosome as in many other teleosts previously studied.
Four species of crabs of the genus Maja have been described along the European coast: M. brachyda... more Four species of crabs of the genus Maja have been described along the European coast: M. brachydactyla, M. squinado, M. goltziana and M. crispata. The commercially important species M. brachydactyla and M. squinado achieve the largest body sizes and are the most similar in morphology, and are therefore easily confused. The four species of Maja were identified using a novel morphometric index and a polymerase chain reaction followed by restriction fragment length polymorphism analysis (RFLP). The relationship between carapace length and the distance between the tips of antorbital spines was used to distinguish adults of M. brachydactyla and M. squinado. PCR-RFLP analysis of a partial sequence of the mitochondrial cytochrome oxidase type I (COI) revealed that the four species of the genus Maja can be unambiguously discriminated using the combination of restriction endonucleases enzymes HpyCH4V and Ase I. The molecular identification may be particularly useful in larvae, juvenile and young crabs, when the morphological differences found in adults are not applicable.
The Dodecanese region has a high prevalence of marine alien species due to its close proximity to... more The Dodecanese region has a high prevalence of marine alien species due to its close proximity to the Suez Canal and associated Suez shipping lanes, as well as its location at biogeographical border between subtropical and tropical biota. This region is therefore very important for the early detection of alien species entering the Mediterranean Sea via the Suez Canal and it is imperative that monitoring of alien species is continued in order to assess the levels of biological invasion. We present results of marine alien surveys, carried out in April 2014 on the island of Rodos. Surveys were performed by a team of marine taxonomic experts and students as part of an EU wide training school, coordinated by the COST Action TD1209 "Alien Challenge". A variety of survey methods were employed to cover a number of coastal habitats. These included: rapid assessment surveys of epibiota on artificial structures in harbours, rapid assessment snorkelling surveys of biota on sublittoral bedrock, and quantified fishing surveys (both boat-seine and trammel net fishing methods). A total of 33 alien and cryptogenic species were recorded across all the survey techniques. Of these species, 9 represented first records for Rodos: the foraminiferan Amphisorus hemprichii, the polychaetes Branchiomma bairdi, Dorvillea similis, Hydroides dirampha and Pseudonereis anomala, the molluscs Aplysia parvula, Chama pacifica and Septifer cumingii, and the bryozoan Hippopodina feegeensis. Of note the record of the Lessepsian invader Dorvillea similis represents the second record in the Mediterranean Sea. Alien fish species represented a small but notable proportion of the diversity, biomass and number of individuals in fishing catch of both fishing methods. All alien fish species observed were already known to be present in Rodos. The addition of species firstly recorded in this study brings the total number of marine alien and cryptogenic species in the Dodecanese region up to 129 species. The vast majority of these alien species have entered unaided via the Suez Canal, but an increasing number have been introduced through hull fouling or ballast water transfer from shipping. The results highlight the value of conducting marine alien surveys with teams of a diverse range of taxonomic expertise, both in its scientific output and student training.
Abstract Twenty-four individuals of Albunea carabus (Linnaeus, 1758), a species rarely reported i... more Abstract Twenty-four individuals of Albunea carabus (Linnaeus, 1758), a species rarely reported in the Mediterranean Sea, have recently been collected in the Tyrrhenian Sea (Italy) in hydraulic dredge surveys carried out to assess local razor clam stocks. They were found in sandy bottoms at depths of 1–6 m in association with the commercial bivalves Ensis minor and Chamelea gallina and the decapods Diogenes pugilator, Portumnus latipes and Liocarcinus vernalis. The distribution of the species in the Italian seas is described based on a careful search of the available records. Notes on its reproductive biology and autoecology are also included.
Knowledge of connectivity among subpopulations is fundamental in the identification of the approp... more Knowledge of connectivity among subpopulations is fundamental in the identification of the appropriate geographical scales for stock status evaluation and management, the identification of areas with greater retention rates, and space-based fisheries management. Here, an integration of hydrodynamic, biological, and habitat models results is used to assess connectivity and support the definition of essential fish habitats (EFH) in the Adriatic Sea, with reference to Nephrops norvegicus, an important benthic commercial resource, the recruitment of which is strongly related to larval dispersal from spawning to recruitment areas. We explored oceanographic and biological connectivity in the Adriatic Sea under a wide and representative variety of oceanographic conditions (winters 2006-2012) by tracking 3D trajectories of larvae released from different areas. We used a Lagrangian model that features a specific larval behavior module with explicit dependence on environmental parameters (i.e., temperature and sediment type) and that is driven by high-resolution hydrodynamic and meteorological data. The results were used to partition the area in which Nephrops was observed into 20 homogenous management subareas; to assess the connection between spawning, recruitment, and harvesting grounds; and to identify potential subpopulation boundaries as well as the connectivity among the potential subpopulations. The results suggest the presence of at least three distinct subpopulations, which need to be independently managed and conserved, and confirms that the Jabuka-Pomo pit is the most important spawning area, but alone it cannot sustain Nephrops populations throughout the Adriatic Sea. The results also show the importance to move from particle-tracking to approaches based on integrated models. K E Y W O R D S connectivity, essential fish habitats, fisheries management, fisheries-restricted areas, Lagrangian model, larval recruitment, Nephrops norvegicus This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
... con questo nome designamo in via del tutto prowisoria una forma epilitica vivente presso la s... more ... con questo nome designamo in via del tutto prowisoria una forma epilitica vivente presso la superficie, di dimensioni assai piccole (tricomi diam. 6-9 14, lunghi fino a 50 It) con una sola eterocisti, che non sembra coincidere con alcuna specie finora descritta. ...
The squat-lobster Munida intermedia is very common over the muddy bottoms (depth 200-256 m) of th... more The squat-lobster Munida intermedia is very common over the muddy bottoms (depth 200-256 m) of the western Pomo pit (Central Adriatic). Density estimates, obtained from a short underwater television survey, ranged from 0.2 to 0.6 individuals/m 2. Scientific trawling carried out in the years 1993-1994 with a small mesh net, yielded large catches of M. intermedia, and made possible the study of some aspects of its life history. M. intermedia is a gonochoric species that spawns once per year. Adult females have ripe ovaries in autumn and become ovigerous in winter. No ovigerous female was found after February. The smallest ovigerous female measured 8.5 mm carapace length, and the largest 23 mm. Fecundity is related to size and ranges between 870 and 5300 new-laid eggs per female. The reproductive season is well defined (from October to February), with a single spawning per year. Therefore, modal components in the length frequency distributions were identified with year classes and the mean lengths at age obtained were used to compute the parameters of the growth equation separately for the two sexes. The average lifespan of M. intermedia probably does not exceed four years and males reach a slightly larger size than females (maximum carapace length: 25 mm males, 23 mm females). Sexual maturity in both sexes is reached at the end of the first year of life. A high percentage of specimens (males 9%, females 22%) had external evidence of infestation by Rhizocephala and representatives of three genera were recorded. Specimens as small as 7.5 mm carapace length were found parasitized and the highest frequencies of parasites were observed in the size range 10-14 mm.
Vlaams Instituut voor de Zee. VLIZ. Informatie over marien en kustgebonden onderzoek & beleid... more Vlaams Instituut voor de Zee. VLIZ. Informatie over marien en kustgebonden onderzoek & beleid in Vlaanderen.
In Redazione il 27 rnaggio 1970 I n Tipografia il30 Ottobre 1970 ... ABSTRACT. - Phytoplanktoii c... more In Redazione il 27 rnaggio 1970 I n Tipografia il30 Ottobre 1970 ... ABSTRACT. - Phytoplanktoii collected during the fishes death occured off the western middle Adriatic coasts in Afay 1969. - A taxonomic inventory of some phytoplankton samples taken during a red bloom ...
The stomach contents of poor cod, Trisopterus minutus capelanus (Lacepe Áde), were taken at month... more The stomach contents of poor cod, Trisopterus minutus capelanus (Lacepe Áde), were taken at monthly intervals off the eastern coast of the Gulf of Valencia (Spain). A total of 1276 were analyzed to determine diet according to fish size and season. The basic food consists of crustaceans (Mysidacea and Decapoda) and teleosts. Feeding habits varied with size: decapods and fishes were more abundant in the stomachs of larger specimens. Little seasonal variation in food habits was recorded. Problem Two subspecies of the poor cod Trisopterus minutus, separated on the basis of morphoanatomical features, exist in the European Sea waters: the Mediterranean poor cod, T. m. capelanus (Lacepe Áde), and the Atlantic poor cod, T. m. minutus (L.) (Svetovidov, 1948). T. m. capelanus is a common gadoid found in the western Mediterranean and eastern Atlantic Ocean off the coast of Morocco, whereas T. m. minutus occurs from Trondheim Fjord to Gibraltar (Whitehead et al., 1989). However, recent genetic analyses (Tirard et al., 1992; Mattiangeli et al., 2000) support the classification of Atlantic and Mediterranean poor cod as distinct taxa and the close relationship between the Mediterranean poor cod and bib Trisopterus luscus (Linnaeus 1758). The feeding habits of T. m. minutus have been studied by various authors (
Testis of the Teleostean fish Trisopterus minutus capelanus has been examined to study the organi... more Testis of the Teleostean fish Trisopterus minutus capelanus has been examined to study the organization of the seminiferous tubules and the ultrastructural features of the germ cells. The testis is shown to be composed of seminiferous tubules full of cells: only few of them have just a very narrow lumen. Each tubule is divided by thin septa of connective tissue in zones containing homogeneous cells; such an organization is confirmed by ultrastructural images showing groups of synchronously developing germ cells. By morphological characterization of the germ cells found in each zone, 6 maturation stages have been identified. During spermiogenesis, a progressive shrinkage of germ cells and a nuclear chromatin condensation have been observed. Intercellular bridges, homogeneously dispersed granules of glycogen and groups of mitochondria associated with dense granular material have been described. Such features are present in the earlier stages of spermiogenesis and are retained until the later stages of spermatid differentiation. The spermatozoon shows a lack of acrosome as in many other teleosts previously studied.
Four species of crabs of the genus Maja have been described along the European coast: M. brachyda... more Four species of crabs of the genus Maja have been described along the European coast: M. brachydactyla, M. squinado, M. goltziana and M. crispata. The commercially important species M. brachydactyla and M. squinado achieve the largest body sizes and are the most similar in morphology, and are therefore easily confused. The four species of Maja were identified using a novel morphometric index and a polymerase chain reaction followed by restriction fragment length polymorphism analysis (RFLP). The relationship between carapace length and the distance between the tips of antorbital spines was used to distinguish adults of M. brachydactyla and M. squinado. PCR-RFLP analysis of a partial sequence of the mitochondrial cytochrome oxidase type I (COI) revealed that the four species of the genus Maja can be unambiguously discriminated using the combination of restriction endonucleases enzymes HpyCH4V and Ase I. The molecular identification may be particularly useful in larvae, juvenile and young crabs, when the morphological differences found in adults are not applicable.
The Dodecanese region has a high prevalence of marine alien species due to its close proximity to... more The Dodecanese region has a high prevalence of marine alien species due to its close proximity to the Suez Canal and associated Suez shipping lanes, as well as its location at biogeographical border between subtropical and tropical biota. This region is therefore very important for the early detection of alien species entering the Mediterranean Sea via the Suez Canal and it is imperative that monitoring of alien species is continued in order to assess the levels of biological invasion. We present results of marine alien surveys, carried out in April 2014 on the island of Rodos. Surveys were performed by a team of marine taxonomic experts and students as part of an EU wide training school, coordinated by the COST Action TD1209 "Alien Challenge". A variety of survey methods were employed to cover a number of coastal habitats. These included: rapid assessment surveys of epibiota on artificial structures in harbours, rapid assessment snorkelling surveys of biota on sublittoral bedrock, and quantified fishing surveys (both boat-seine and trammel net fishing methods). A total of 33 alien and cryptogenic species were recorded across all the survey techniques. Of these species, 9 represented first records for Rodos: the foraminiferan Amphisorus hemprichii, the polychaetes Branchiomma bairdi, Dorvillea similis, Hydroides dirampha and Pseudonereis anomala, the molluscs Aplysia parvula, Chama pacifica and Septifer cumingii, and the bryozoan Hippopodina feegeensis. Of note the record of the Lessepsian invader Dorvillea similis represents the second record in the Mediterranean Sea. Alien fish species represented a small but notable proportion of the diversity, biomass and number of individuals in fishing catch of both fishing methods. All alien fish species observed were already known to be present in Rodos. The addition of species firstly recorded in this study brings the total number of marine alien and cryptogenic species in the Dodecanese region up to 129 species. The vast majority of these alien species have entered unaided via the Suez Canal, but an increasing number have been introduced through hull fouling or ballast water transfer from shipping. The results highlight the value of conducting marine alien surveys with teams of a diverse range of taxonomic expertise, both in its scientific output and student training.
Abstract Twenty-four individuals of Albunea carabus (Linnaeus, 1758), a species rarely reported i... more Abstract Twenty-four individuals of Albunea carabus (Linnaeus, 1758), a species rarely reported in the Mediterranean Sea, have recently been collected in the Tyrrhenian Sea (Italy) in hydraulic dredge surveys carried out to assess local razor clam stocks. They were found in sandy bottoms at depths of 1–6 m in association with the commercial bivalves Ensis minor and Chamelea gallina and the decapods Diogenes pugilator, Portumnus latipes and Liocarcinus vernalis. The distribution of the species in the Italian seas is described based on a careful search of the available records. Notes on its reproductive biology and autoecology are also included.
Knowledge of connectivity among subpopulations is fundamental in the identification of the approp... more Knowledge of connectivity among subpopulations is fundamental in the identification of the appropriate geographical scales for stock status evaluation and management, the identification of areas with greater retention rates, and space-based fisheries management. Here, an integration of hydrodynamic, biological, and habitat models results is used to assess connectivity and support the definition of essential fish habitats (EFH) in the Adriatic Sea, with reference to Nephrops norvegicus, an important benthic commercial resource, the recruitment of which is strongly related to larval dispersal from spawning to recruitment areas. We explored oceanographic and biological connectivity in the Adriatic Sea under a wide and representative variety of oceanographic conditions (winters 2006-2012) by tracking 3D trajectories of larvae released from different areas. We used a Lagrangian model that features a specific larval behavior module with explicit dependence on environmental parameters (i.e., temperature and sediment type) and that is driven by high-resolution hydrodynamic and meteorological data. The results were used to partition the area in which Nephrops was observed into 20 homogenous management subareas; to assess the connection between spawning, recruitment, and harvesting grounds; and to identify potential subpopulation boundaries as well as the connectivity among the potential subpopulations. The results suggest the presence of at least three distinct subpopulations, which need to be independently managed and conserved, and confirms that the Jabuka-Pomo pit is the most important spawning area, but alone it cannot sustain Nephrops populations throughout the Adriatic Sea. The results also show the importance to move from particle-tracking to approaches based on integrated models. K E Y W O R D S connectivity, essential fish habitats, fisheries management, fisheries-restricted areas, Lagrangian model, larval recruitment, Nephrops norvegicus This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
... con questo nome designamo in via del tutto prowisoria una forma epilitica vivente presso la s... more ... con questo nome designamo in via del tutto prowisoria una forma epilitica vivente presso la superficie, di dimensioni assai piccole (tricomi diam. 6-9 14, lunghi fino a 50 It) con una sola eterocisti, che non sembra coincidere con alcuna specie finora descritta. ...
The squat-lobster Munida intermedia is very common over the muddy bottoms (depth 200-256 m) of th... more The squat-lobster Munida intermedia is very common over the muddy bottoms (depth 200-256 m) of the western Pomo pit (Central Adriatic). Density estimates, obtained from a short underwater television survey, ranged from 0.2 to 0.6 individuals/m 2. Scientific trawling carried out in the years 1993-1994 with a small mesh net, yielded large catches of M. intermedia, and made possible the study of some aspects of its life history. M. intermedia is a gonochoric species that spawns once per year. Adult females have ripe ovaries in autumn and become ovigerous in winter. No ovigerous female was found after February. The smallest ovigerous female measured 8.5 mm carapace length, and the largest 23 mm. Fecundity is related to size and ranges between 870 and 5300 new-laid eggs per female. The reproductive season is well defined (from October to February), with a single spawning per year. Therefore, modal components in the length frequency distributions were identified with year classes and the mean lengths at age obtained were used to compute the parameters of the growth equation separately for the two sexes. The average lifespan of M. intermedia probably does not exceed four years and males reach a slightly larger size than females (maximum carapace length: 25 mm males, 23 mm females). Sexual maturity in both sexes is reached at the end of the first year of life. A high percentage of specimens (males 9%, females 22%) had external evidence of infestation by Rhizocephala and representatives of three genera were recorded. Specimens as small as 7.5 mm carapace length were found parasitized and the highest frequencies of parasites were observed in the size range 10-14 mm.
Vlaams Instituut voor de Zee. VLIZ. Informatie over marien en kustgebonden onderzoek & beleid... more Vlaams Instituut voor de Zee. VLIZ. Informatie over marien en kustgebonden onderzoek & beleid in Vlaanderen.
In Redazione il 27 rnaggio 1970 I n Tipografia il30 Ottobre 1970 ... ABSTRACT. - Phytoplanktoii c... more In Redazione il 27 rnaggio 1970 I n Tipografia il30 Ottobre 1970 ... ABSTRACT. - Phytoplanktoii collected during the fishes death occured off the western middle Adriatic coasts in Afay 1969. - A taxonomic inventory of some phytoplankton samples taken during a red bloom ...
The report includes and examines the list of taxonomists from IAMC (Institute for Coastal Marine ... more The report includes and examines the list of taxonomists from IAMC (Institute for Coastal Marine Environment), IGG (Institute of Geosciences and Earth Resources), ISE (Institute of Ecosystem Study), and ISMAR (Institute of Marine Sciences), who responded to the Taxonomy Census 2016, their scientific publications and the number of taxa described new for the science in the last 50 years. Every paper is reported with keywords, helping the reader to understand taxon/taxa of each publication and the focal habitat. This analysis becomes the basis for the future steps to resurrect taxonomy within CNR, from common project proposals to the protection of past and present knowledge gained to date in this area.
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Papers by Carlo Froglia
DOI: 10.5281/zenodo.569874