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Combining information for monitoring at large spatial scales: First statewide abundance estimate of the Florida manatee

Julien Martin, Holly H. Edwards, Christopher J. Fonnesbeck, Stacie M. Koslovsky, more

Biological Conservation > 2015 > 186 > C > 44-51

Monitoring abundance and distribution of organisms over large landscapes can be difficult. Because of challenges associated with logistics and data analyses uncorrected counts are often used as a proxy for abundance. We present the first statewide estimate of abundance for Florida manatees (Trichechus manatus latirostris) using an innovative approach that combines multiple sources of information....

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Monitoring the impact of litter in large vertebrates in the Mediterranean Sea within the European Marine Strategy Framework Directive (MSFD): Constraints, specificities and recommendations

F. Galgani, F. Claro, M. Depledge, C. Fossi, more

Marine Environmental Research > 2014 > 100 > Complete > 3-9

In its decision (2010/477/EU) relating to the European Marine Strategy Framework Directive (MSFD, 2008/56/EC), the European Commission identified the following points as focuses for monitoring: (i) 10.1.1: Trends in the amount, source and composition of litter washed ashore and/or deposited on coastlines, (ii) 10.1.2: Trends in the amount and composition of litter in the water column and accumulation...

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A review of oceanographic applications of water column data from multibeam echosounders

Keir Colbo, Tetjana Ross, Craig Brown, Tom Weber, more

Estuarine, Coastal and Shelf Science > 2014 > 145 > Complete > 41-56

Multibeam echosounder systems (MBES) have long provided bathymetric data with high temporal and spatial resolution. In the last couple of decades, MBES observations of scattering in the water column have been finding increasing use in oceanographic studies. Here we review the wealth of studies using water column multibeam data to address questions in fisheries, marine mammal and zooplankton research...

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The importance of tidewater glaciers for marine mammals and seabirds in Svalbard, Norway

Christian Lydersen, Philipp Assmy, Stig Falk-Petersen, Jack Kohler, more

Journal of Marine Systems > 2014 > 129 > Complete > 452-471

Approximately 60% of Svalbard's land areas are glaciated at the present time. The Archipelago has more than 1100 glaciers (>1km ² ) and 163 of these are ''tidewater glaciers'' - that is glaciers that terminate (with their calving front) at the sea. It has been known for a long time that these glacier front areas are important feeding areas for seabirds and marine mammals. Herein, we review...

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Social interactions and information use by foraging seabirds

Samantha Anne Monier

Biological Reviews > 99 > 5 > 1717 - 1735

What do seabirds perceive about the world? How do they do so? And how do they use the information available to them to make foraging decisions? Social cues provide seabirds with information about the location of prey. This can, of course, be passive and not involve higher‐order cognitive processes (e.g. simple conspecific or heterospecific attraction). However, seabirds display many behaviours that...

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Traversing the land‐sea interface: A climate change risk assessment of terrestrially breeding marine predators

Milan Sojitra, Stuart Corney, Mark Hemer, Sheryl Hamilton, more

Global Change Biology > 30 > 8 > n/a - n/a

Terrestrially breeding marine predators have experienced shifts in species distribution, prey availability, breeding phenology, and population dynamics due to climate change worldwide. These central‐place foragers are restricted within proximity of their breeding colonies during the breeding season, making them highly susceptible to any changes in both marine and terrestrial environments. While ecologists...

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Evidence of marine predation on silver New Zealand longfin eels, Anguilla dieffenbachii

Donald Jellyman, Paul Franklin, Kim Aarestrup, Kim Birnie‐Gauvin, more

Fisheries Management and Ecology > 31 > 4 > n/a - n/a

The use of Pop‐up Satellite Archival Tags (PSATs) has provided considerable new information about the behaviour of migrating (silver) eels (Anguilla spp.) at sea, with 9 of 19 recognised species or subspecies tagged to date. However, such studies often reported premature tag detachment and relatively high rates of predation. Since 2000, several PSAT‐tagged New Zealand longfin eels, Anguilla dieffenbachii...

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A Quantitative Analysis of Microplastics in the Gastrointestinal Tracts of Odontocetes in the Southeast Region of the United States

Julia M. Courville, Rose Borkowski, Lucy Sonnenberg, Gretchen K. Bielmyer‐Fraser

Environmental Toxicology and Chemistry > 43 > 6 > 1260 - 1273

Microplastics (<5 mm in diameter) are ubiquitous in the oceanic environment, yet microplastic accumulation in marine mammals is vastly understudied. In recent years, efforts have been made to document microplastic profiles in odontocetes. The objective of the present study was to describe and quantify microplastics in the gastrointestinal (GI) tracts of deceased odontocetes that stranded in the...

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Seasonal abundance estimates of cetaceans in the southern Black Sea (Sinop), Türkiye

Uğur Özsandıkçı, Süleyman Özdemir

Marine Mammal Science > 40 > 2 > n/a - n/a

The availability of reliable information on the abundance and distribution of threatened species is fundamental to evaluating their conservation status and taking the necessary measures to implement effective management. The seasonal abundance and distribution of cetaceans in the Sinop region, one of the essential fishing areas of the Black Sea, were estimated with line‐transect data. Dedicated boat‐based...

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Resource partitioning in a cetacean community from Uruguayan waters

Meica Valdivia, Luciano O. Valenzuela, Verónica Berriel, Diego Rodríguez, more

Marine Mammal Science > 40 > 2 > n/a - n/a

The study of resource partitioning within a community is central to understanding the processes that enable interspecific competition and coexistence. This study aimed to understand the resource partitioning and habitat preferences among odontocetes in Uruguay. We analyzed stable carbon and nitrogen isotopes data from the bone tissue of common dolphins (Delphinus delphis), Fraser's dolphins (Lagenodelphis hosei...

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A feasibility study for the application of climate change vulnerability assessments on species in the Tallurutiup Imanga National Marine Conservation Area

Aaron Cogger, Ramon Filgueira, Erin Keenan

Aquatic Conservation: Marine and Freshwater Ecosystems > 34 > 3 > n/a - n/a

Climate change is disproportionately affecting Arctic ecosystems and their resident species, but knowledge gaps complicate conservation planning. A proof‐of‐concept application of existing trait‐based vulnerability assessment frameworks were applied to nine species from three different taxa (cetaceans, pinnipeds, marine fish) to determine their vulnerability under the RCP 8.5 emissions scenario....

article

Ecosystem indicators: predicting population responses to combined climate and anthropogenic changes in shallow seas

Neda I. Trifonova, Beth E. Scott

Ecography > 2024 > 3 > n/a - n/a

Crowded seas are becoming a pressing management problem with the increased development of offshore renewable energy (ORE) to combat climate change. Marine ecosystems are complex and varied; therefore, we need new tools to help rapidly increase our understanding of how they are likely to change with both climate and anthropogenic changes. This study uses a pragmatic data‐driven Bayesian network approach...

article

Effects of feeding and habitat on resting metabolic rates of the Pacific walrus

Karyn D. Rode, Joan Rocabert, Alicia Borque‐Espinosa, Diana Ferrero‐Fernández, more

Marine Mammal Science > 40 > 1 > 184 - 195

Arctic marine mammals live in a rapidly changing environment due to the amplified effects of global warming. Pacific walruses (Odobenus rosmarus divergens) have responded to declines in Arctic sea‐ice extent by increasingly hauling out on land farther from their benthic foraging habitat. Energy models can be useful for better understanding the potential implications of changes in behavior on body...

article

Resting metabolic rate and lung function in fasted and fed rough‐toothed dolphins, Steno bredanensis

Andreas Fahlman, Kaylee Rhieu, Brie Alessi, Shelly Marquardt, more

Marine Mammal Science > 40 > 1 > 210 - 221

We measured resting metabolic rate (RMR), tidal volume (V_T), breathing frequency (f_R), respiratory flow, and end‐expired gases in rough‐toothed dolphins (Steno bredanensis) housed in managed care after an overnight fast and 1–2 hr following a meal. The measured average (± standard deviation) V_T (4.0 ± 1.3 L) and f_R (1.9 ± 1.0 breaths/min) were higher and lower, respectively, as compared with estimated...

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Identification of priority cetacean areas in the north‐east Atlantic using systematic conservation planning

Joan Giménez, James J. Waggitt, Mark Jessopp

Aquatic Conservation: Marine and Freshwater Ecosystems > 33 > 12 > 1571 - 1579

Mobile marine protected areas have been proposed for the conservation of highly seasonal or mobile marine megafauna. However, seasonal data on the distribution of marine wildlife to inform protected areas are generally scarce worldwide, especially for cetaceans, which makes dynamic solutions difficult to implement. Furthermore, conservation objectives are often set at the level of individual species...

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The initial steps toward the formation of somatic tissue banks and cell cultures derived from captive Antillean manatee (Trichechus manatus manatus) skin biopsies

Matheus B. Nascimento, Yasmin B. F. Moura, Radan E. M. Oliveira, Gabriela P. O. Lira, more

Zoo Biology > 42 > 6 > 709 - 722

The declining population of the Antillean manatee caused by ecosystem degradation and rising pollution has prompted interest in developing conservation strategies for this species. Given this scenario, somatic tissue banks are important tools for acquiring knowledge about the species, as well as for obtaining somatic cells for biotechnological and ecotoxicological applications. Therefore, we aimed...

article

Killer whales at northern Patagonia, Argentina: Evidence of different foraging groups from stable isotopes

Rocio Loizaga, Nestor A. García, Cristian A. Durante, Damián G. Vales, more

Marine Mammal Science > 39 > 4 > 1121 - 1135

Killer whales (Orcinus orca) are highly mobile, large marine apex predators that inhabit all oceans. Despite being the most conspicuous top predator, little is known about their ecology along Patagonia, Argentina. Here, we used carbon (δ¹³C) and nitrogen (δ¹⁵N) isotope analysis of bone and dentine collagen from killer whales (n = 13) stranded in northern Patagonia during the period 1970–2014 to assess...

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Red‐list status and extinction risk of the world's whales, dolphins, and porpoises

Gill T. Braulik, Barbara L. Taylor, Gianna Minton, Giuseppe Notarbartolo di Sciara, more

Conservation Biology > 37 > 5 > n/a - n/a

To understand the scope and scale of the loss of biodiversity, tools are required that can be applied in a standardized manner to all species globally, spanning realms from land to the open ocean. We used data from the International Union for the Conservation of Nature Red List to provide a synthesis of the conservation status and extinction risk of cetaceans. One in 4 cetacean species (26% of 92...

article

Disturbances due to unmanned aerial vehicles (UAVs) on harbor seal (Phoca vitulina) colonies: Recommendations on best practices

María Pérez Tadeo, Martin Gammell, Seán A. O'Callaghan, Ian O'Connor, more

Marine Mammal Science > 39 > 3 > 757 - 779

The increase in the use of unmanned aerial vehicles (UAVs) in marine mammal research has raised concerns, as its potential impacts remain largely unknown. To assess the effects of disturbances on harbor seals by a DJI Phantom 4 Pro, behavioral responses were recorded before, during, and after UAV approaches at two colonies. GLMMs were applied to assess proportions of seals displaying vigilance, resting,...

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Long‐term persistence of large dugong groups in a conservation hotspot around Hawar Island, Kingdom of Bahrain

Abdulqader Khamis, Ameer Abdulla, Elrika D'Souza, Nachiket Kelkar, more

Aquatic Conservation: Marine and Freshwater Ecosystems > 33 > 6 > 592 - 605

Predictable aggregations of large marine mammals are valuable conservation targets, but aggregated populations can also be exposed to site‐level threats. The globally vulnerable Dugong dugon has a wide distribution but is found in large numbers mainly in Australia and the Arabian Gulf. Though Australian dugong populations are well studied, much less is known of the dugongs in the Arabian Gulf. The...

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Search results

Combining information for monitoring at large spatial scales: First statewide abundance estimate of the Florida manatee

Monitoring the impact of litter in large vertebrates in the Mediterranean Sea within the European Marine Strategy Framework Directive (MSFD): Constraints, specificities and recommendations

A review of oceanographic applications of water column data from multibeam echosounders

The importance of tidewater glaciers for marine mammals and seabirds in Svalbard, Norway

Social interactions and information use by foraging seabirds

Traversing the land‐sea interface: A climate change risk assessment of terrestrially breeding marine predators

Evidence of marine predation on silver New Zealand longfin eels, Anguilla dieffenbachii

A Quantitative Analysis of Microplastics in the Gastrointestinal Tracts of Odontocetes in the Southeast Region of the United States

Seasonal abundance estimates of cetaceans in the southern Black Sea (Sinop), Türkiye

Resource partitioning in a cetacean community from Uruguayan waters

A feasibility study for the application of climate change vulnerability assessments on species in the Tallurutiup Imanga National Marine Conservation Area

Ecosystem indicators: predicting population responses to combined climate and anthropogenic changes in shallow seas

Effects of feeding and habitat on resting metabolic rates of the Pacific walrus

Resting metabolic rate and lung function in fasted and fed rough‐toothed dolphins, Steno bredanensis

Identification of priority cetacean areas in the north‐east Atlantic using systematic conservation planning

The initial steps toward the formation of somatic tissue banks and cell cultures derived from captive Antillean manatee (Trichechus manatus manatus) skin biopsies

Killer whales at northern Patagonia, Argentina: Evidence of different foraging groups from stable isotopes

Red‐list status and extinction risk of the world's whales, dolphins, and porpoises

Disturbances due to unmanned aerial vehicles (UAVs) on harbor seal (Phoca vitulina) colonies: Recommendations on best practices

Long‐term persistence of large dugong groups in a conservation hotspot around Hawar Island, Kingdom of Bahrain

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