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  • 1
    Electronic Resource
    Electronic Resource
    Photochemical efficiency of photosystem II, photon yield of O2 evolution, photosynthetic capacity, and carotenoid composition during the midday depression of net CO2 uptake in Arbutus unedo growing in Portugal (1989)
    Springer
    Planta 177 (1989), S. 377-387 
    Details
    ISSN: 1432-2048
    Keywords: Arbutus ; Carotenoid ; CO2 uptake Chlorophyll fluorescence ; Midday depression of CO2 uptake ; Photoinhibition ; Photosynthesis during midday depression
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract During the “midday depression” of net CO2 exchange in the mediterranean sclerophyllous shrub Arbutus unedo, examined in the field in Portugal during August of 1987, several parameters indicative of photosynthetic competence were strongly and reversibly affected. These were the photochemical efficiency of photosystem (PS) II, measured as the ratio of variable to maximum chlorophyll fluorescence, as well as the photon yield and the capacity of photosynthetic O2 evolution at 10% CO2, of which the apparent photon yield of O2 evolution was most depressed. Furthermore, there was a strong and reversible increase in the content of the carotenoid zeaxanthin in the leaves that occurred at the expense of both violaxanthin and β-carotene. Diurnal changes in fluorescence characteristics were interpreted to indicate three concurrent effects on the photochemical system. First, an increase in the rate of radiationless energy dissipation in the antenna chlorophyll, reflected by changes in 77K fluorescence of PSII and PSI as well as in chlorophyll a fluorescence at ambient temperature. Second, a state shift characterized by an increase in the proportion of energy distributed to PSI as reflected by changes in PSI fluorescence. Third, an effect lowering the photon yield of O2 evolution and PSII fluorescence at ambient temperature without affecting PSII fluorescence at 77K which would be expected from a decrease in the activity of the water splitting enzyme system, i.e. a donor side limitation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00403596
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Effect of suspended microplastics on larval survival of the cold-water scleractinian coral Desmophyllum pertusum (2024)
    PANGAEA
    Details
    Publication Date: 2024-03-15
    Description: We report the results of a short-term experiment testing the effects of microplastics (MP) on the larvae of the cold-water coral Desmophyllum pertusum (syn. Lophelia pertusa). The experiment was conducted at the Tjärnö Marine Laboratory Facilities (University of Gothenburg, Sweden). To simulate MP pollution, we used 6 μm yellow-green fluorescent polystyrene microbeads (catalog no: 17156, Polysciences). The experimental design consisted of three treatments: control treatment with (1) no MP addition (0 MP/mL), (2) addition of 1000 pristine MP/mL, and (3) addition of 1000 biofouled MP/mL. Larvae were exposed to the different treatments in 75 mL culture flasks mounted on a rotating plankton wheel to keep sediments in suspension. After a 24-hour period, the potential impact of MP on larval survival was analyzed.
    Keywords: Cnidaria; Cold water corals; Deep sea; Experiment duration; iAtlantic; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; Laboratory experiment; larvae; Lophelia pertusa; Microplastics; North Atlantic; Remote operated vehicle; Replicate; ROV; scleractinians; Species; Species, unique identification (Semantic URI); Species, unique identification (URI); Survival; Tisler_Sampling_Lophelia_pertusa_5; Tisler_Sampling_Lophelia_pertusa_7; Tisler_Sampling_Lophelia_pertusa_8; Tisler Reef, Skagerrak; Tjärnö_Lophelia_Experiment; Tjärnö, Schweden; Treatment; VID; Visual identification
    Type: Dataset
    Format: text/tab-separated-values, 54 data points
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    DATA PANGAEA
  • 3
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    Effect of suspended microplastics on larval swimming speed of the cold-water scleractinian coral of Desmophyllum pertusum (2024)
    PANGAEA
    Details
    Publication Date: 2024-03-15
    Description: We report the results of a short-term experiment testing the effects of microplastics (MP) on the larvae of the cold-water coral Desmophyllum pertusum (syn. Lophelia pertusa). The experiment was conducted at the Tjärnö Marine Laboratory Facilities (University of Gothenburg, Sweden). To simulate MP pollution, we used 6 μm yellow-green fluorescent polystyrene microbeads (catalog no: 17156, Polysciences). The experimental design consisted of three treatments: control treatment with (1) no MP addition (0 MP/mL), (2) addition of 1000 pristine MP/mL, and (3) addition of 1000 biofouled MP/mL. Larvae were exposed to the different treatments in 75 mL culture flasks mounted on a rotating plankton wheel to keep sediments in suspension. After a 24-hour period, the potential impact of MP on larval swimming speed was analyzed using image analysis software (Meijering et al. 2012).
    Keywords: Cnidaria; Cold water corals; Deep sea; Distance; Duration; Experiment duration; iAtlantic; Image analysis, NIH ImageJ, MTrackJ plugin; Individual ID; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; Laboratory experiment; larvae; Lophelia pertusa; Microplastics; North Atlantic; Number of points; Remote operated vehicle; Replicate; ROV; scleractinians; Species; Species, unique identification (Semantic URI); Species, unique identification (URI); Speed, swimming; Tisler_Sampling_Lophelia_pertusa_5; Tisler_Sampling_Lophelia_pertusa_7; Tisler_Sampling_Lophelia_pertusa_8; Tisler Reef, Skagerrak; Tjärnö_Lophelia_Experiment; Tjärnö, Schweden; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 560 data points
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    DATA PANGAEA
  • 4
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    A review of interactions between cetaceans and fisheries in the Azores (2011)
    Details
    Publication Date: 2022-05-26
    Description: Author Posting. © John Wiley & Sons, 2010. This is the author's version of the work. It is posted here by permission of John Wiley & Sons for personal use, not for redistribution. The definitive version was published in Aquatic Conservation: Marine and Freshwater Ecosystems 21 (2011): 17-27, doi:10.1002/aqc.1158
    Description: 1. Interactions between cetaceans and fishing activity in the Archipelago of the Azores were examined using information contained in grey literature and previously unpublished data collected by observer programmes and research projects from 1998 to 2006. Together with a brief description of the economics, gear, fishing effort, and past and ongoing monitoring projects, levels of cetacean bycatch and interference were reported for each major fishery. 2. Cetaceans were present in 7% (n=973) and interfered in 3% (n=452) of the fishing events monitored by observers aboard tuna-fishing vessels. Interference resulted in a significantly higher proportion of events with zero catches but it was also associated with higher tuna catches. 3. There was a decreasing trend in the proportion of tuna-fishing events with cetacean presence or interference throughout this study, as well as a reduction in the estimates of dolphins captured annually by the whole fleet. 4. Observers reported cetacean depredation in 16% of the sets for demersal species and in 2% of the sets for swordfish. Cetacean presence and depredation were associated with higher overall catches and higher catches per unit effort in demersal fisheries. Bottlenose dolphins (Tursiops truncatus) were responsible for most depredation events in demersal fisheries, whereas in the swordfish fishery, depredation was associated with the presence of killer whales (Orcinus orca). There were no reports of cetacean bycatch in these fisheries. There were also no reports of cetaceans interacting in the experimental deep-sea fisheries that were examined. 5. Available data suggests that levels of interaction between cetaceans and Azorean fisheries are generally low and that the economic impact of cetacean interference is probably small. However, for several traditional fisheries there are no accurate data to determine levels of cetacean interaction. We recommend that existing observer programmes be expanded to increase observer coverage of the demersal and swordfish fisheries and allow monitoring of other existing and emerging fisheries.
    Description: M.A.S. was supported by an FCT postdoctoral (SFRH/BPD/29841/2006) grant, and R.P. was supported by an FCT doctoral grant (SFRH/BD/32520/2006).
    Keywords: Cetacean–fisheries interactions ; Depredation ; Bycatch ; Fisheries ; Atlantic Ocean ; Azores
    Repository Name: Woods Hole Open Access Server
    Type: Preprint
    Format: application/pdf
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    PAPER (OA)
  • 5
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    Scientific, Technical and Economic Committee for Fisheries (STECF) - Evaluation of Joint Recommendations on the landing obligation and on Technical Measures Regulation (STECF-23-04 & 23-06) (2023)
    Publications Office of the European Union | Luxembourg
    Details
    Publication Date: 2023-07-18
    Description: Commission Decision of 25 February 2016 setting up a Scientific, Technical and Economic Committee for Fisheries, C(2016) 1084, OJ C 74, 26.2.2016, p. 4–10. The Commission may consult the group on any matter relating to marine and fisheries biology, fishing gear technology, fisheries economics, fisheries governance, ecosystem effects of fisheries, aquaculture or similar disciplines. This report contains a review of Joint Recommendations submitted by Member States Regional Groups for the implementation of the Landing Obligation in 2024 and beyond.
    Description: European Commission
    Description: Published
    Description: Refereed
    Keywords: Landing Obligation ; STECF
    Repository Name: AquaDocs
    Type: Report
    Format: 406pp.
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    PAPER (OA)
  • 6
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    First record of Sepietta obscura Naef, 1916 in Atlantic waters (1996)
    Instituto Português de Investigação Marítima
    In:  Boletim, 2 . pp. 97-99.
    Details
    Publication Date: 2021-05-12
    Description: During a research cruise of R/V "Poseidon" in Portuguese coastal waters in June 1995, 12 Pelagic "Engel" Trawls were undertaken, three of which resulted in catches 167 cephalopod specimens, belonging to eight species and two families. Among these, two females of Sepietta obscura Naef, 1916 were identified from a station at roughly the latitude of Aveiro, over a bottom depth of 220 m and a trawling depth between 0 and 200 m. This record represents the first documented evidence of the presence of the species in the Atlantic Ocean, since previously it was only recorded for the Mediterranean Sea, from where it was thought to be endemic.
    Type: Article , PeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 7
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    Fish and cephalopods associated with the squid Loligo vulgaris Lamarck, 1798 in Portuguese waters (1997)
    Institut de Ciències del Mar de Barcelona
    In:  Scientia Marina, 61 (Suppl. 2). pp. 87-97.
    Details
    Publication Date: 2021-05-11
    Description: Fish and cephalopod taxa occurring in association with Loligo vulgaris, in Portuguese waters between Lisbon and Vila Real de Santo António, were investigated by sampling with bottom trawling equipment between 1990-1991 and 1993-1995. The family Triglidae, the genera Pagellus and Trachurus and the four species Alloteuthis subulata, Boops boops, Callionymus lyra, and Merluccius merluccius were found, on average, in at least 75% of the trawls with L. vulgaris. Conversely, that cephalopod was found in at least 75% of the trawls with the family Trachinidae, the genera Dentex, Diplodus, Liza and Torpedo and the six species, Hyperoplus lanceolatus, Pagrus pagrus, Pomatoschistus m. minutus, Psetta m. maxima, Scophthalmus rhombus and Spicara flexuosa. An index of "affinity" (ranging from -∞ to 1) between L. vulgaris and the other taxa was used in order to highlight co-occurrences of an unlikely coincidental nature. Lists of taxa with high affinity index scores (0.5 to 1) are given for 5 different situations: all samples together; samples grouped by bottom depth; samples grouped by research cruise; research cruises grouped by season and by year. Pair wise comparisons between all taxa lists for each of the 5 situations were made, indicating a greater influence of depth than any other factor in the composition of the lists. The significance of the degree of similarity between lists of taxa, "preferred" under different circumstances and the reasons for those "preferences" are discussed.
    Type: Article , PeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 8
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    Biology and ecology of cephalopod species commercially exploited, Species accounts (2010)
    ICES
    In:  In: Cephalopod biology and fisheries in Europe. , ed. by Pierce, G. J., Allcock, L., Bruno, I., Bustamante, P., Gonzalez, A., Guerra, A., Jereb, P., Lefkaditou, E., Malham, S., Moreno, a., Pereira, J., Piatkowski, U., Rasero, M., Sanchez, P., Santos, M. B., Santurtun, M., Seixas, S., Sobrino, I. and Villanueva, R. ICES Cooperative Research Report, 303 . ICES, Copenhagen, Denmark, pp. 9-29. ISBN 978‐87‐7482‐078‐9
    Details
    Publication Date: 2019-06-25
    Type: Book chapter , NonPeerReviewed
    Format: text
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    OceanRep: Book chapter
  • 9
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    Octopus vulgaris Cuvier, 1797 (2015)
    ICES
    In:  In: Cephalopod biology and fisheries in Europe: II. Species Accounts. , ed. by Jereb, P., Allcock, L. A., Lefkaditou, E., Piatkowski, U., Hastie, L. C. and Pierce, G. J. ICES Cooperative Research Report, 325 . ICES, Copenhagen, Denmark, pp. 13-28. ISBN 978-87-7482-155-7
    Details
    Publication Date: 2017-09-21
    Type: Book chapter , NonPeerReviewed
    Format: text
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    OceanRep: Book chapter
  • 10
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    The future of cephalopod populations, fisheries, culture, and research in Europe (2010)
    ICES
    In:  In: Cephalopod biology and fisheries in Europe. , ed. by Pierce, G. J., Allcock, L., Bruno, I., Bustamante, P., Gonzalez, A., Guerra, A., Jereb, P., Lefkaditou, E., Malham, S., Moreno, a., Pereira, J., Piatkowski, U., Rasero, M., Sanchez, P., Santos, M. B., Santurtun, M., Seixas, S., Sobrino, I. and Villanueva, R. ICES Cooperative Research Report, 303 . ICES, Copenhagen, Denmark, pp. 86-118. ISBN 978‐87‐7482‐078‐9
    Details
    Publication Date: 2019-06-25
    Type: Book chapter , NonPeerReviewed
    Format: text
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    OceanRep: Book chapter
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