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Journal of experimental marine biology and ecology 28건

  1. [해외논문]   Inside Front Cover - Editorial Board Page/Cover image legend if applicable  


    Journal of experimental marine biology and ecology v.497 ,pp. IFC , 2017 , 0022-0981 ,

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  2. [해외논문]   Inside Front Cover - Editorial Board Page/Cover image legend if applicable   SCI SCIE


    Journal of experimental marine biology and ecology v.497 ,pp. IFC - IFC , 2017 , 0022-0981 ,

    초록

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  3. [해외논문]   Pneumatocysts provide buoyancy with minimal effect on drag for kelp in wave-driven flow   SCI SCIE

    Burnett, Nicholas P. (Corresponding author.) , Koehl, M.A.R.
    Journal of experimental marine biology and ecology v.497 ,pp. 1 - 10 , 2017 , 0022-0981 ,

    초록

    Abstract Many seaweeds have buoyant gas-filled bladders (pneumatocysts) that hold fronds upright in the water column and enhance their access to light for photosynthesis. However, ambient water currents bend flexible seaweeds, pushing fronds closer to the substratum where light is lower, so the hydrodynamic drag on pneumatocysts may counteract their buoyancy in flowing water. The effects of pneumatocysts on frond hydrodynamic drag were investigated in this study, as well as how the positions of pneumatocysts along fronds affect their motion and height in wave-driven water flow. The kelp Egregia menziesii was used as a model organism because it is abundant on wave-swept rocky shores and because our field surveys revealed that this species shows great variation in pneumatocyst size, number, and location on fronds. In laboratory towing-tank studies, it was found that drag on pneumatocysts was reduced when they were bent over by flowing water. The drag due to pneumatocysts was small compared to the drag on a whole frond. At flow speeds up to 0.58ms −1 , the buoyant force exerted by a pneumatocyst was greater than the drag it experienced. In wave-tank experiments using models of fronds with pneumatocysts at different positions, the pneumatocysts were most effective at lifting fronds high in the water column when they were located at the distal tips of the fronds, both in small and large waves. However, if fronds had pneumatocysts that were not at the tip, an increase in the peak velocities of waves led to an increase in the heights of the fronds in the water column. In the field, pneumatocysts did not affect the back-and-forth horizontal motion of E. menziesii exposed to waves, but fronds with pneumatocysts were higher in the water column than fronds with no pneumatocysts, even when the number of pneumatocysts on a frond was low. Our results indicate that pneumatocysts can exhibit great variability in size, number, and location with only a small effect on hydrodynamic forces on a kelp, that pneumatocysts at frond tips are most effective at holding kelp high in the water column, but that only a few pneumatocysts at any location along a frond can enhance the frond's height in waves. Highlights Pneumatocysts provide buoyancy to seaweeds, lifting them up into the water column. Drag on individual pneumatocysts is small compared to drag on whole seaweed. Pneumatocysts at tips of fronds are most effective for lifting frond in the water. Wave-driven water motion helps lift frond up, regardless of pneumatocyst location.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

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  4. [해외논문]   Metabolic response and thermal tolerance of green abalone juveniles (Haliotis fulgens: Gastropoda) under acute hypoxia and hypercapnia   SCI SCIE

    Tripp-Valdez, Miguel A. (Integrative Ecophysiology, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Am Handelshafen12, D-27570 Bremerhaven, Germany ) , Bock, Christian (Integrative Ecophysiology, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Am Handelshafen12, D-27570 Bremerhaven, Germany ) , Lucassen, Magnus (Integrative Ecophysiology, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Am Handelshafen12, D-27570 Bremerhaven, Germany ) , Lluch-Cota, Salvador E. (Centro de Investigaciones Biológicas del Noroeste (CIBNOR), Instituto Politécnico Nacional, 195, La Paz, Baja California Sur 23096, Mexico ) , Sicard, M. Teresa (Centro de Investigaciones Biológicas del Noroeste (CIBNOR), Instituto Politécnico Nacional, 195, La Paz, Baja California Sur 23096, Mexico ) , Lannig, Gisela (Integrative Ecophysiology, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Am Handelshafen12, D-27570 Bremerhaven, Germany ) , Pö (Integrative Ecophysiology, Alfred Wegener Institute Helmholtz Centre for Polar and Marine) , rtner, Hans O.
    Journal of experimental marine biology and ecology v.497 ,pp. 11 - 18 , 2017 , 0022-0981 ,

    초록

    Abstract With ongoing climate change, rising ocean temperature is usually accompanied by falling oxygen levels (hypoxia) and increasing CO 2 concentration (hypercapnia). Both drivers may impose constraints on physiological mechanisms that define thermal limits resulting in increased vulnerability towards warming in marine ectotherms. The present study aimed to detect differences in thermal tolerance by investigating the underlying metabolic responses in the green abalone ( Haliotis fulgens ) under conditions of hypoxia and hypercapnia. Juvenile abalones were exposed to a temperature ramp (+3°Cday −1 ) under hypoxia (50% air saturation) and hypercapnia (~1000μatm p CO 2 ), both individually and in combination. Impacts on energy metabolism were assessed by analyzing whole animal respiration rates and metabolic profiles of gills and hepatopancreas via 1 H NMR spectroscopy. While hypercapnia had a minor impact on the results of the temperature treatment, hypoxia strongly increased the vulnerability to warming, indicated by respiration rates falling below values expected from an exponential increase and by the onset of anaerobic metabolism suggesting a downward shift of the upper critical temperature. Warming under combined hypoxia and hypercapnia elicited a severe change in metabolism involving a strong accumulation of amino acids, osmolytes and anaerobic end products at intermediate temperatures, followed by declining concentrations at warmer temperatures. This matched the limited capacity to increase metabolic rate, loss of attachment and mortality observed under these conditions suggesting a strong narrowing of the thermal window. In all cases, the accumulation of free amino acids identified proteins as a significant energy source during warming stress. Highlights Assessment of the impacts of hypoxia and hypercapnia on thermal tolerance Hypoxia induced a downshift in critical temperature. Hypercapnia did not affect thermal tolerance. Both drivers combined prompted a stronger narrowing of thermal tolerance. Warming stress induced protein degradation under all experimental conditions.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  5. [해외논문]   Baited remote underwater stereo-video outperforms baited downward-facing single-video for assessments of fish diversity, abundance and size composition   SCI SCIE

    Cundy, Megan E. (Department of Environment and Agriculture, School of Science, Curtin University, Bentley Campus 6485, Western Australia, Australia ) , Santana-Garcon, Julia (Department of Environment and Agriculture, School of Science, Curtin University, Bentley Campus 6485, Western Australia, Australia ) , Ferguson, Adrian M. (Department of Parks and Wildlife, Jurien Bay 6516, Western Australia, Australia ) , Fairclough, David V. (Department of Environment and Agriculture, School of Science, Curtin University, Bentley Campus 6485, Western Australia, Australia ) , Jennings, Paul (Department of Environment, Water and Natural Resources - Kangaroo Island, 37 Dauncey Street, Kingscote, SA 5223, Australia ) , Harvey, Euan S. (Department of Environment and Agriculture, School of Science, Curtin University, Bentley Campus 6485, Western Australia, Australia)
    Journal of experimental marine biology and ecology v.497 ,pp. 19 - 32 , 2017 , 0022-0981 ,

    초록

    Abstract Rapid changes in video technology have allowed for the development of sophisticated, efficient methods for surveying fish communities, including systems that use single or stereo video cameras, which are baited or unbaited and used remotely, by divers or on Remote Operated Vehicles. Video methods are non-extractive and their deployment can be standardised. As a result of the spatial and temporal repeatability of video techniques they are often used to monitor the biodiversity, assemblage composition and size structure of marine fishes. Because of the biases and sampling efficiencies of different configurations, consideration is required as to which is the most appropriate design for the objectives of a particular study. Baited remote underwater stereo-video systems (stereo-BRUVs), which record across the seascape, and downward-facing single camera baited underwater video systems (downward-BUVs) were deployed in temperate reef habitats on the west coast of Australia to compare the numbers of species and individuals, the assemblage composition, and the relative abundances and size distributions of focal species recorded by both techniques. Stereo-BRUVs sampled a different assemblage composition of fishes than downward-BUVs, observing significantly more species (84 vs 63) and individuals (7321 vs 4490). In general, stereo-BRUVs sampled a greater range of trophic groups than downward BUVs, including species not directly attracted to the bait (e.g. herbivores). Some carnivores that were recorded on the stereo-BRUVs were rarely, or never observed by downward-BUVs. This is attributed to the increased numbers of fish and species recorded in the broader field of view of the stereo-BRUVs. The power to detect a 20, 50 or 100% change (at α=0.05) in numbers of species and individuals was comparable between methods, but typically greater for stereo-BRUVs for some of the focal species. Length distributions of focal species differed significantly between methods in most cases, with stereo-BRUVs providing accurate and precise measurements, while downward-BUVs often over-estimated lengths. We conclude that forward-facing stereo-BRUVs were superior to downward-facing single camera BUVs in virtually all aspects tested. Highlights Stereo-BRUVs observed more species and fish than downward BUVs. Stereo-BRUVs sampled fishes from more trophic groups than downward BUVs. Stereo-BRUVs had greater statistical power for target or focal species. Statistical power was similar for numbers of species and individuals. Downward BUVs tended to overestimate the size of fish.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  6. [해외논문]   Human activities influence benthic community structure and the composition of the coral-algal interactions in the central Maldives   SCI SCIE

    Brown, Kristen T. (School of Biological Sciences, University of Queensland, 4072 St. Lucia, QLD, Australia ) , Bender-Champ, Dorothea (School of Biological Sciences, University of Queensland, 4072 St. Lucia, QLD, Australia ) , Bryant, Dominic E.P. (School of Biological Sciences, University of Queensland, 4072 St. Lucia, QLD, Australia ) , Dove, Sophie (School of Biological Sciences, University of Queensland, 4072 St. Lucia, QLD, Australia ) , Hoegh-Guldberg, Ove (School of Biological Sciences, University of Queensland, 4072 St. Lucia, QLD, Australia)
    Journal of experimental marine biology and ecology v.497 ,pp. 33 - 40 , 2017 , 0022-0981 ,

    초록

    Abstract Competitive processes and their outcomes, such as interactions between scleractinian corals and macroalgae, are important drivers of the structure and function of coral reef ecosystems. Human communities can alter the dynamics of coral-algal interactions by changing species abundance and by affecting competitive ability. Here, we investigated how a natural human population gradient in the Maldives influences the relative abundance of benthic organisms, and if changes in benthic cover can influence the diversity, frequency and outcomes of coral-algal interactions. We observed a decline in some coral assemblages and an increase in coral mortality and filamentous algae on reefs with the highest human population pressures. At the highest level of human population, the diversity of coral-algal interactions was significantly reduced, with some genera of plating corals locally sparse. Human population pressures did not increase the frequency of coral-algal interactions or the competitive ability of macroalgal types. Regardless of human population, interactions between filamentous algae and cyanobacteria were the most damaging to competing corals. Interactions between crustose coralline algae and Halimeda were not only the most common and least harmful to coral, but were also positively correlated with coral cover, emphasizing the role that positive species interactions can play in regulating community structure and function. Highlights Human activities influence benthic community composition. Human activities influence the composition of coral-algal interactions. Coral-algal interactions increase when there is greater competition for space. Interactions with calcifying macroalgae were positively correlated to hard coral cover.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  7. [해외논문]   Resistance to nutrient enrichment varies among components in the Cymodocea nodosa community   SCI SCIE

    Jimé (Corresponding author.) , nez-Ramos, Rocí , o , Mancilla, Monique , Villazá , n, Beatriz , Egea, Luis G. , Gonzá , lez-Ortiz, Vanessa , Vergara, Juan José , , Pé , rez-Lloré , ns, José , Lucas , Brun, Fernando G.
    Journal of experimental marine biology and ecology v.497 ,pp. 41 - 49 , 2017 , 0022-0981 ,

    초록

    Abstract The response of the seagrass community to perturbations, such as nutrient enrichment, is far from being uniform, since different components of the community may have different degrees of resistance to disturbance. An in situ manipulative experiment was conducted to test the effects of nutrient enrichment on the resistance of the Cymodocea nodosa community (i.e. seagrasses, epiphytes and benthic fauna) over two consecutive summers. We recorded distinct responses in the studied components (i.e. autotrophs versus heterotrophs) of the C. nodosa community to nutrient enrichment. The biomass of the autotrophic component (e.g. C. nodosa and its epiphytes) remained unaltered during the first summer, showing initial resistance to nutrient enrichment, but seagrass biomass increased during the second summer. The lower shoot density recorded for C. nodosa during the second year may explain this result because the resulting sparse canopy could have led to less self-shading, thus boosting growth. Thus, resistance to nutrient enrichment in autotrophs was shown to be a density-dependent phenomenon in this community, revealing the importance of seagrass health in resistance to nutrient enrichment. In contrast, nutrient enrichment significantly increased benthic fauna diversity over the entire study period. Therefore, different components of the C. nodosa community showed different degrees of resistance to nutrient enrichment, with annual variation playing a role in the resistance of the autotrophic component of the community and the fauna community showing less resistance to nutrient enrichment through an increase in fauna diversity and abundance over both years. Highlights Autotrophic responses to nutrient enrichment revealed differential resistance between summer 2010 and 2011 in biomass Responses to nutrient enrichment showed to be a density-dependent phenomenon in this C. nodosa community. Nutrient enrichment increased significantly benthic fauna diversity during the whole studied period.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  8. [해외논문]   Regional variations in early life stages response to a temperature gradient in the northern shrimp Pandalus borealis and vulnerability of the populations to ocean warming   SCI SCIE

    Ouellet, Patrick (Fisheries and Oceans Canada, Maurice Lamontagne Institute, 850 route de la mer, Mont-Joli, QC G5H 3Z4, Canada ) , Chabot, Denis (Fisheries and Oceans Canada, Maurice Lamontagne Institute, 850 route de la mer, Mont-Joli, QC G5H 3Z4, Canada ) , Calosi, Piero (Département de Biologie, Chimie et Géographie, Université) , Orr, David (du Québec à) , Galbraith, Peter S. (Rimouski, 300 Allée des Ursulines, Rimouski, QC G5L 3A1, Canada )
    Journal of experimental marine biology and ecology v.497 ,pp. 50 - 60 , 2017 , 0022-0981 ,

    초록

    Abstract In order to define the relative vulnerability of northern shrimp ( Pandalus borealis ) populations to the ongoing global warming, we compared the thermal performance curves for survival and growth in the first three pelagic larval stages from three populations of the Northwest Atlantic. Egg carrying females were obtained from different regions characterized by distinct sea surface temperature (SST) conditions for larval development in spring. Two independent experiments were conducted in two different years. In spring 2012, larvae from females captured in the Lower St Lawrence Estuary (LE) and in the Northeast Gulf of St Lawrence (GSL) were compared. In spring 2014, larvae from females captured in the LE and on the Labrador–Newfoundland Shelf (Northwest Atlantic, NWA) were used. The LE larvae were used both years and served as the reference population for comparisons. In 2012 and 2014, groups of 25 newly hatched northern shrimp larvae from each source population were incubated at six temperatures (0, 3, 6, 9, 12, and 15°C) to monitor and compare survival and growth at moult. Northern shrimp larvae from the LE (warmer May–June SST) had a higher optimal temperature range for survival compared to larvae from the GSL and the NWA (colder May–June SST) populations. However, in 2012 growth performance at moult was reduced at higher temperatures for the LE population compared to the GSL population. The differences in thermal performance curves observed may suggest the presence of a certain level of local adaptation in response to the different regional SST regimes in spring–early summer. Northern shrimp larvae in the Northeast Gulf of St Lawrence and Northwest Atlantic shelf could benefit from warmer early-spring temperatures; however, larvae from the Lower Estuary may be closer to their upper tolerance limits and thus more likely at risk of negative impact of future warming of surface water masses. Highlights Optimal survival temperatures in northern shrimp larvae varied for populations from cold and warm regions of the NW Atlantic. Northern shrimp larvae from cold regions (e.g., Labrador Shelf) could benefit from warmer surface water in spring. Northern shrimp larvae from an isolated population in the Lower St Lawrence Estuary (warm region) could be at risk from future warming.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  9. [해외논문]   Selective byssus attachment behavior of mytilid mussels from hard- and soft-bottom coastal systems   SCI SCIE

    Aguilera, Moisé (Departamento de Biología Marina, Facultad Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile ) , s A. (Departamento de Biología Marina, Facultad Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile ) , Thiel, Martin (Universität Kiel, Zoologisches Institut, Arbeitsgruppe Marine Ökologie und Systematik, Olshausenstr. 40-60, D-24118 Kiel, Germany ) , Ullrich, Niklas (Departamento de Biología Marina, Facultad Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile ) , Luna-Jorquera, Guillermo (Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Wadden Sea Station Sylt, Hafenstrasse 43, 25992 List/Sylt, Germany) , Buschbaum, Christian
    Journal of experimental marine biology and ecology v.497 ,pp. 61 - 70 , 2017 , 0022-0981 ,

    초록

    Abstract In both sedimentary and rocky coastal habitats, epibenthic mytilid mussels use byssal threads for attachment to the substratum and to form beds with high densities of individuals. Number and attachment strength of byssal threads can be adjusted according to external factors such as hydrodynamic forces or predators, but it is unknown whether mytilid mussels distinguish between substrata of different quality for byssus attachment in different habitat types. In field studies, we examined the attachment strength of the mussel Perumytilus purpuratus growing on Pacific hard- and soft-bottom shores in Chile and of the blue mussel Mytilus edulis from an Atlantic rocky shore in France and a sedimentary shore in the North Sea (Germany), respectively. In additional laboratory experiments, we studied mussel substratum selectivity of both bivalve species from soft and hard bottoms by offering living versus dead, barnacle-fouled vs. unfouled, and firmly attached vs. loose conspecifics. In the field, attachment strength of P. purpuratus on hard bottoms was substantially higher than on soft bottoms even though mussels produced more byssus in the latter habitat. In contrast, blue mussels M. edulis showed only a slightly reduced attachment strength on soft compared to hard bottoms. In the soft-bottom habitat, fouled individuals from the edge of a blue mussel bed were especially strongly attached. In the byssus attachment behavior experiments, P. purpuratus from both habitats showed a significant preference for living conspecifics and those from soft bottoms preferred firmly attached conspecifics. Blue mussels had no preference for particular conspecifics except those from soft-bottom habitats, which preferred fouled over clean mussels. In general, in the choice experiments hard-bottom M. edulis produced more byssus. Our results confirmed that mytilid mussels may show active substratum choice for byssus attachment, which depends on mussel species and habitat type. The results suggest that mussels are adapted to a particular habitat type, with P. purpuratus showing lower adaptation to soft-bottom areas while M. edulis shows successful strategies for both environments. Highlights Mussels had different attachment strength depending on shell size, individual position and habitat type. Perumytilus purpuratus from soft and hard bottoms preferentially attached to living conspecifics. Mytilus edulis had low selectivity for particular conspecifics in both soft and hard bottom habitat. Choice experiments showed behavioral differences between Mytilid species adapted to different habitats.

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  10. [해외논문]   Assessing potential limitations when characterising the epibiota of marine megafauna: Effect of gender, sampling location, and inter-annual variation on the epibiont communities of olive ridley sea turtles   SCI SCIE

    Robinson, Nathan J. (The Leatherback Trust, Goldring-Gund Marine Biology Station, Playa Grande, Guanacaste, Costa Rica ) , Figgener, Christine (Marine Biology IDP, Department of Oceanography, Texas A&M University, College Station, USA ) , Gatto, Christopher (School of Biological Sciences, Monash University, Wellington Road, Clayton 3800, Victoria, Australia ) , Lazo-Wasem, Eric A. (Division of Invertebrate Zoology, Peabody Museum of Natural History, Yale University, New Haven, CT, USA ) , Paladino, Frank V. (The Leatherback Trust, Goldring-Gund Marine Biology Station, Playa Grande, Guanacaste, Costa Rica ) , Tomillo, Pilar Santidriá (The Leatherback Trust, Goldring-Gund Marine Biology Station, Playa Grande, Guanacaste, Costa Rica ) , n (Department of Biology, The Citadel, Charleston, SC, USA ) , Zardus, John D. (Department of Biological and Environmental Sciences, Western Connecticut State University, Danbury, CT, USA) , Pinou, Theodora
    Journal of experimental marine biology and ecology v.497 ,pp. 71 - 77 , 2017 , 0022-0981 ,

    초록

    Abstract The epibionts of marine megafauna can serve as valuable indicators of the host's health or behaviour; however, only a few studies have attempted to determine how and why epibiont communities vary between host individuals, populations, or even species. Further complicating efforts to compare epibiont communities of marine megafaunas is that measures of epibiont abundance and diversity may be influenced by the sampling methods and timing of the assessment. Here, we examined how host gender, geographic location, and sampling year affect measures of epibiont community structure in olive ridley sea turtles, Lepidochelys olivacea , in the East Pacific Ocean. To achieve this, we identified, enumerated, and then statistically compared the epibiont communities of (1) nesting female turtles sampled over different nesting seasons, (2) female turtles sampled on nesting beaches and at sea, and (3) female and male turtles, both sampled at sea. We did not discover statistically significant differences between the epibiont communities of nesting female turtles sampled on different years nor between females sampled on nesting beaches and at sea. However, we did observe a statistically significant difference between the epibiont communities of female and male turtles. Thus, we conclude that while sampling epibionts from nesting sea turtles may be an accurately and more logistically straight-forward method than sampling turtle at sea, it should not be assumed that epibiont communities of male and female hosts are identical. We also suggest that knowledge of the factors that drive intra-specific variation in the epibiont communities of marine megafauna, be it biological or methodological factors, is necessary before broader-scale meta-analyses are made to determine spatial and temporal patterns in the distribution of epibiont communities worldwide. Highlights Epibiont communities of nesting and free-swimming olive ridley sea turtles were characterised. The majority of mobile epibionts appear to remain on sea turtle hosts even if they leave the water. Epibiont communities of nesting turtles were not different to those sampled at sea. Epibiont communities of olive ridley turtles differ between sexes. Further studies are required to understand the factors driving individual variation in epibiont communities.

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