| 1. |
- Appelqvist, Christin, 1972, et al.
(författare)
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Distribution and abundance of teredinid recruits along the Swedish coast - are shipworms invading the Baltic Sea?
- 2015
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Ingår i: Journal of the Marine Biological Association of the United Kingdom. - 0025-3154 .- 1469-7769. ; 95:4, s. 783-790
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Tidskriftsartikel (refereegranskat)abstract
- Shipworms (teredinids) are highly specialized marine bivalves that consume terrestrially derived wood. Changes in environmental variables may result in shipworms spreading into the Baltic Sea – which would have devastating consequences for maritime cultural heritage and submerged wooden structures. We investigated the distribution and abundance of the shipworms Teredo navalis and Psiloteredo megotara along the Swedish coast in 2006–2008, and compared our findings with data collected at partly the same locations in 1971–1973. Wooden test panels were submerged in near-surface waters at 18 harbours. The presence of shipworms was determined by X-ray radiography of each panel. Sea surface temperature and salinity data were analysed to investigate whether any changes in distribution were correlated to changes in environmental variables. We found that past and present distributions of T. navalis were similar – indicating that no range expansion of shipworms into the Baltic Sea has taken place the last 35 years. The abundance of T. navalis was similar between decades at all investigated sites except two (Arild and Barsebäckshamn), where abundances were higher in 2006–2008. The abundance of T. navalis varied along the coast and was positively correlated to mean sea surface salinity, but not to mean sea surface temperature (2006–2008 data). The distribution and abundance of P. megotara were similar during the two study periods with only single observations at a few sites. In conclusion, we found no evidence of range expansion of shipworms along the Swedish coast.
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| 2. |
- Cárdenas, Paco, et al.
(författare)
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A new Hymedesmia (Demospongiae, Poecilosclerida) with large sigmas off western Sweden
- 2016
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Ingår i: Journal of the Marine Biological Association of the United Kingdom. - 0025-3154 .- 1469-7769. ; 96:6, s. 1305-1312
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Tidskriftsartikel (refereegranskat)abstract
- Hymedesmia (Hymedesmia) lindstroemae sp. nov. collected at 178–210 m depth off the western Swedish coast is described. This encrusting sponge is notably characterized by its unusually large sigmas. This new species brings the number of Hymedesmia (Hymedesmia) species in Swedish waters to 30. A key for all the North Atlantic Hymedesmia (Hymedesmia) species with sigmas (32 species) is included.
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| 3. |
- Cárdenas, Paco, et al.
(författare)
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Demosponges from the Northern Mid-Atlantic Ridge shed more light on the diversity and biogeography of North Atlantic deep-sea sponges
- 2015
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Ingår i: Journal of the Marine Biological Association of the United Kingdom. - 0025-3154 .- 1469-7769. ; 95:7, s. 1475-1516
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Tidskriftsartikel (refereegranskat)abstract
- In July-August 2004, the Mid-Atlantic Ridge Ecosystems (MAR-Eco) expedition collected Demospongiae (Porifera) from the Northern Mid-Atlantic Ridge (MAR) north of the Azores, between 41 degrees N and 61 degrees N. Demosponges were found at 10 stations, at depths ranging from 753 to 3046 m. Twenty-two species were identified: 17 Tetractinellida, one Polymastiida, one Suberitida, two Poecilosclerida and one Dendroceratida. The study of this material is an opportunity to revise the taxonomy and the North Atlantic distribution of each of these deep-sea species. Some species are particularly rare and poorly known (Tetilla longipilis, Tetilla sandalina, Craniella azorica, Polymastia corticata) and two are new to science: Forcepia (Forcepia) toxafera sp. nov. and Iotroata paravaridens sp. nov. This study suggests that the MAR is not a longitudinal barrier for the dispersal of deep-sea demosponges while on the contrary, the Charlie-Gibbs Fracture Zone (CGFZ) may be a latitudinal border for the dispersal of deep-sea demosponges, due to great depths and currents.
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| 4. |
- Claverie, Thomas, et al.
(författare)
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Spawning aggregations and mass movements in subtidal Onchidoris bilamellata (Mollusca Opisthobranchia)
- 2008
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Ingår i: Journal of the Marine Biological Association of the United Kingdom. - : Cambridge University Press. - 0025-3154 .- 1469-7769. ; 88:1, s. 157-159
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Tidskriftsartikel (refereegranskat)abstract
- Little is known about spawning aggregations in subtidal populations of the nudibranch Onchidoris bilamellata. We provide photographic evidence of the spawning aggregations and associated spawning migrations or mass movements whose occurrence was debated.
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| 5. |
- Clements, J. C., et al.
(författare)
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Roll, right, repeat: short-term repeatability in the self-righting behaviour of a cold-water sea cucumber
- 2020
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Ingår i: Journal of the Marine Biological Association of the United Kingdom. - : Cambridge University Press (CUP). - 0025-3154 .- 1469-7769. ; 100:1, s. 115-120
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Tidskriftsartikel (refereegranskat)abstract
- For many benthic marine invertebrates, inversion (being turned upside-down) is a common event that can increase vulnerability to predation, desiccation and unwanted spatial transport, and requires behavioural 'self-righting' to correct. While self-righting behaviour has been studied for more than a century, the repeatability (R) - the portion of behavioural variance due to inter-individual differences - of this trait is not well understood. Heritability and the evolution of animal behaviour rely on behavioural repeatability. Here, we examined the self-righting technique of a cold-water holothurid, Parastichopus tremulus, and assessed the repeatability of this behaviour. Under laboratory conditions, P. tremulus consistently used muscle contractions to curl its body and roll itself back to an upright position, which provided for rapid (x +/- SD = 96.7 +/- 49.8 s) and highly repeatable (R = 0.75) self-righting in the short term that varied between individuals (range of individual average righting times = 34.8-217.0 s). Righting time tended to increase with animal size; however, substantial variation was evident at comparable sizes, as average righting time ranged from 34.8-155.5 s for animals similar to 20 cm in body length. Contrary to previous studies on other echinoderms, we found no evidence of improved righting times for P. tremulus over time. This study ultimately provides the first detailed documentation of self-righting behaviour for P. tremulus and suggests that this species displays a high degree of repeatability for this trait in the short term.
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| 6. |
- De Almeida, Inaê Guion, et al.
(författare)
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Assessing Guiana dolphin abundance and density in the Southwestern Atlantic : Insights from conservation areas
- 2023
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Ingår i: Journal of the Marine Biological Association of the United Kingdom. - : Cambridge University Press. - 0025-3154 .- 1469-7769. ; 103
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Tidskriftsartikel (refereegranskat)abstract
- Accurate demographic data play a critical role in implementing conservation strategies and identifying key areas for species preservation. The population abundance and density of Sotalia guianensis were estimated in the estuarine-lagoon complex of Cananéia, Brazil, using distance sampling. The survey covered 1339.91 km with 83 h 05 min in effort. A half-normal model with cosine adjustments was evaluated as the best fit to estimate an abundance of 193 individuals (95% CI 158-237) and a density of 2.55 ind km-2. The majority of sightings occurred in the Baía de Trapandé (48.72%), followed by the Mar de Cananéia (32.72%) and Mar de Cubatão (18.56%), the three areas surrounding the Ilha de Cananéia. The study confirmed the heterogeneous distribution of the estuary and found that the Mar de Cananéia and the Baía de Trapandé were more densely populated, with 2.76 ind km-2 (95% CI 1.93-3.96) and 2.76 ind km-2 (95% CI 2.07-3.66), respectively, while the Mar de Cubatão was less densely populated, with 1.59 ind km-2 (95% CI 1.04-2.44). The findings support previous research indicating a stable population over the last few decades. The Cananéia estuary is an ecologically diverse region located between protected areas under different categories of environmental protection and harbours a significant population of S. guianensis, providing essential resources for feeding and breeding. Protected areas have proven to be effective tools for preserving both marine and terrestrial environments. Despite the close proximity to humans and constant threats, the study underscores the importance of the area for the conservation of the species.
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| 7. |
- Díaz, Julio A., et al.
(författare)
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Poorly known sponges in the Mediterranean with the detection of some taxonomic inconsistencies
- 2020
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Ingår i: Journal of the Marine Biological Association of the United Kingdom. - : Cambridge University Press (CUP). - 0025-3154 .- 1469-7769. ; 100:8, s. 1247-1260
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Tidskriftsartikel (refereegranskat)abstract
- The poorly known sponge species Axinella vellerea (Topsent, 1904), Acarnus levii (Vacelet, 1960) and Haliclona poecillastroides (Vacelet, 1969) are reported from bottom-trawl samples off the Balearic Islands, Western Mediterranean. A re-description is provided for all three species and the Folmer fragment of cytochrome oxidase subunit I (COI) obtained for A. levii and H. poecillastroides. This is the second report of A. vellerea in the Mediterranean, the first time that A. levii is reported outside Corsica and the first time that H. poecillastroides is documented outside the Gulf of Lion, France. The systematic allocation of A. levii and H. poecillastroides is discussed based on a COI phylogenetic analysis and morphology. The poorly understood phylogeny of the Haplosclerida does not permit us to find a proper allocation for H. poecillastroides, although its current position in the genus Haliclona or the family Chalinidae is not defensible. On the other hand, A. levii currently fits best in the family Microcionidae, and seems related to some Clathria species with mixed features between Clathria and Acarnus. Considering that the species of the genus Acarnus shares a strong synapomorphy (the possession of Cladotylotes), it is plausible for all Acarnus species to be Microcionids. We conclude that H. poecillastroides needs to be reallocated to a new genus: Xestospongia poecillastroides comb. nov. (Petrosiidae). However, a reallocation of A. levii is not advisable for the moment, as this would imply major systematic changes such as the reallocation of the whole genus Acarnus to Microcionidae, and the redescription of Microcionidae and Acarnidae.
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| 8. |
- Dupont, Samuel, 1971, et al.
(författare)
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Bird is the word - on the importance of ethical and effective scientific communication
- 2015
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Ingår i: Journal of the Marine Biological Association of the United Kingdom. - : Cambridge University Press (CUP). - 0025-3154 .- 1469-7769. ; 95:5, s. 863-870
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Tidskriftsartikel (refereegranskat)abstract
- Back in 1963, the proto-punk band The Trashmen released the single Surfin' bird (written by Frazier, White, Harris & Wilson Jr. and released in November 1963 by Garrett label; https://www.youtube.com/watch?v=ZThquH5toow). Fifty years later and despite the obscure lyrics, the song remains iconic in western pop culture; e.g. through the recurrent appearance in the TV show Family Guy (e.g. I dream of Jesus episode, released on 5 October 2008; https://www.youtube.com/watch?v=2WNrx2jq184). It is thought that the line 'everybody knows that the bird is the word' was inspired by a highly successful and catchy radio jingle released/commissioned in post prohibitionist USA by the Gallo brothers to boost the sales of their inexpensive fortified Thunderbird wine: 'What's the word? Thunderbird' (http://www.absurdintellectual.com/2009/06/05/everybodys-heard-that-the- bird-is-the-word-but-its-not-what-they-think/). This illustrates how a simple and catchy message can have a profound and long-lasting influence on society.
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| 9. |
- Glarou, Maria, et al.
(författare)
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Using off-the-shelf GPS loggers to assess co-occurrence between marine mammals and small-scale fisheries : a pilot study from the Mediterranean Sea
- 2022
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Ingår i: Journal of the Marine Biological Association of the United Kingdom. - : Cambridge University Press. - 0025-3154 .- 1469-7769. ; 102:5, s. 322-332
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Tidskriftsartikel (refereegranskat)abstract
- Fisheries constitute a major threat to marine mammals globally. To evaluate the impact of small-scale fisheries (SSF) on regional under-studied marine mammal populations, we tested a novel and cost-effective approach at three data-limited locations of the central and eastern Mediterranean Sea. Using off-the-shelf GPS loggers to track SSF activities and systematic surveys to map the distribution of marine mammals, we assessed the probability of co-occurrence between SSF and marine mammals by reporting areas of spatial overlap. Spatial overlap between SSF and the core zones of marine mammal distribution (ranging between 21.85–35.4%) was observed in all three locations, indicating potential interaction hotspots. The probability of co-occurrence in those areas varied from 0.5–2.9% depending on the species. The resulting overlap between fishing activity and marine mammals may pose a threat in both directions: higher risk of species entanglement and economic burden on fishers due to gear damage. Despite the spatial and temporal limitations of this pilot study, the proposed approach can provide baseline information on SSF-marine mammal co-occurrence, particularly in financially limited regions. If applied on a larger scale, our method may be used to inform future conservation actions with the aim to reduce pressure on key populations.
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| 10. |
- Godefroid, M., et al.
(författare)
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More than local adaptation: high diversity of response to seawater acidification in seven coral species from the same assemblage in French Polynesia
- 2021
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Ingår i: Journal of the Marine Biological Association of the United Kingdom. - : Cambridge University Press (CUP). - 0025-3154 .- 1469-7769. ; 101:4, s. 675-683
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Tidskriftsartikel (refereegranskat)abstract
- Responses of corals to seawater acidification have been extensively studied. Sensitivity varies widely between species, highlighting the need to avoid extrapolation from one to another to get an accurate understanding of coral community responses. We tested the responses of seven coral species (Acropora cytherea, Acropora hyacinthus, Acropora pulchra, Leptastrea pruinosa, Montipora grisea, Pavona cactus, Pocillopora verrucosa) from the Mo'orea lagoon to a 48-day exposure to three pH scenarios (pH 7.95, 7.7 and 7.3). Tissue necrosis, mortality, growth rates, photophysiological performances and colour index were recorded. Few significant differences were noted between pH 7.95 and 7.7, but species-specific responses were observed at pH 7.3. While our data do not allow identification of the mechanisms behind this diversity in response between species inhabiting the same environment, it can exclude several hypotheses such as local adaptation, skeletal type, corallum morphology or calcification rate as sole factors determining coral sensitivity to pH.
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