Mark V. Erdmann
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View article: First Evidence of Neonatal Whale Sharks (Rhincodon typus) in Saleh Bay, West Nusa Tenggara, Indonesia
First Evidence of Neonatal Whale Sharks (Rhincodon typus) in Saleh Bay, West Nusa Tenggara, Indonesia Open
The reproductive biology of the whale shark (Rhincodon typus), the world’s largest fish, remains poorly understood, in large part due to the rarity of observations of neonates and of breeding behaviours. Although several regions in Indones…
View article: Movement ecology and foraging behaviours of oceanic manta rays <i>Mobula birostris</i> in the coastal waters of Aotearoa, New Zealand
Movement ecology and foraging behaviours of oceanic manta rays <i>Mobula birostris</i> in the coastal waters of Aotearoa, New Zealand Open
Understanding the movements and associated behaviours of animals is critical for informed management decisions. This is particularly important for species such as the Endangered oceanic manta ray (Mobula birostris), which has a conservativ…
View article: Spatio-temporal patterns, trends, and oceanographic drivers of whale shark strandings in Indonesia
Spatio-temporal patterns, trends, and oceanographic drivers of whale shark strandings in Indonesia Open
Despite the increased international attention to whale shark conservation, their populations remain predominantly depleted due to anthropogenic activities such as fishing, ship collisions, and marine pollution. Reports of whale shark stran…
View article: Confirmation of green turtle (Chelonia mydas) foraging grounds in northern New Zealand
Confirmation of green turtle (Chelonia mydas) foraging grounds in northern New Zealand Open
The green turtle (Chelonia mydas) is the only sea turtle species to reside year-round in New Zealand waters, with juveniles using shallow coastal habitats as foraging grounds before dispersing throughout the Pacific. Rangaunu Harbour in no…
View article: Insights into the population demographics and residency patterns of photo-identified whale sharks Rhincodon typus in the Bird’s Head Seascape, Indonesia
Insights into the population demographics and residency patterns of photo-identified whale sharks Rhincodon typus in the Bird’s Head Seascape, Indonesia Open
The whale shark ( Rhincodon typus ) is an iconic species in the Bird’s Head Seascape (BHS) in eastern Indonesia, yet little is known about its population and residency patterns across the region. This study documents the population demogra…
View article: FishDiveR: Wavelet analyses and machine learning provide robust classification of animal behaviour from time-depth data
FishDiveR: Wavelet analyses and machine learning provide robust classification of animal behaviour from time-depth data Open
1. Biologging devices have revolutionised our understanding of aquatic animal movement by enabling the collection of detailed depth and temperature time-series. The advent of pop-up satellite archival tags has been particularly impactful, …
View article: The Needle in the Haystack: Uncovering the First Whale Shark ( <i>Rhincodon typus</i> ) Aggregation in the Coral Sea
The Needle in the Haystack: Uncovering the First Whale Shark ( <i>Rhincodon typus</i> ) Aggregation in the Coral Sea Open
Aggregations are key events, supporting critical ecological and biological functions in many species. For highly mobile and elusive species, aggregations often provide the only feasible opportunities for research. Whale sharks ( Rhincodon …
View article: First record of a living coelacanth from North Maluku, Indonesia
First record of a living coelacanth from North Maluku, Indonesia Open
Coelacanths are arguably one of the most emblematic and evolutionarily-important of the marine vertebrates. To date, only two species are known globally: the West Indian Ocean Coelacanth, Latimeria chalumnae, found in the Mozambique Channe…
View article: Staying Close to Home: Horizontal Movements of Satellite-Tracked Reef Manta Rays Mobula alfredi (Krefft, 1868) in the World’s Largest Manta Sanctuary
Staying Close to Home: Horizontal Movements of Satellite-Tracked Reef Manta Rays Mobula alfredi (Krefft, 1868) in the World’s Largest Manta Sanctuary Open
Indonesia is home to significant populations of globally vulnerable reef manta rays (Mobula alfredi) in at least four key regions: Berau, Nusa Penida, Komodo, and Raja Ampat. Despite detailed population studies in each of these regions, li…
View article: Insights into cetacean sightings, abundance, and feeding associations: observations from the boat lift net fishery in the Kaimana important marine mammal area, Indonesia
Insights into cetacean sightings, abundance, and feeding associations: observations from the boat lift net fishery in the Kaimana important marine mammal area, Indonesia Open
A comprehensive understanding of cetacean ecology is crucial for conservation and management. In 2018, Kaimana was identified as an Important Marine Mammal Area (IMMA) due to the regular presence of feeding aggregations of Australian humpb…
View article: Insights into the visitations of oceanic manta rays at cleaning stations on coral reefs in the Bird's Head Seascape, eastern Indonesia
Insights into the visitations of oceanic manta rays at cleaning stations on coral reefs in the Bird's Head Seascape, eastern Indonesia Open
The globally endangered oceanic manta ray Mobula birostris is believed to spend significantly more time in the open ocean than in coastal areas. Nonetheless, the Bird's Head Seascape (BHS) in eastern Indonesia hosts a large population of t…
View article: First Documented Courtship Behavior between Mobula birostris and M. alfredi at a Coral Reef Cleaning Station in Misool, Raja Ampat
First Documented Courtship Behavior between Mobula birostris and M. alfredi at a Coral Reef Cleaning Station in Misool, Raja Ampat Open
Though a previous study in Sudan confirmed the existence of a living hybrid of an oceanic manta ray (Mobula birostris) and a reef manta ray (M. alfredi), courtship behaviors between the two closely related species have never been documente…
View article: Identifying spatial movements and residency of pelagic thresher sharks (Alopias pelagicus) using satellite and passive acoustic telemetry to inform local conservation in central Indonesia
Identifying spatial movements and residency of pelagic thresher sharks (Alopias pelagicus) using satellite and passive acoustic telemetry to inform local conservation in central Indonesia Open
The pelagic thresher shark ( Alopias pelagicus ) is globally endangered, threatened by bycatch, and targeted in industrial and artisanal fisheries in Indonesia. However, a lack of information about their ecology, particularly movement and …
View article: Spatial connectivity of reef manta rays across the Raja Ampat archipelago, Indonesia
Spatial connectivity of reef manta rays across the Raja Ampat archipelago, Indonesia Open
The reef manta ray Mobula alfredi is present throughout most island groups that form the Raja Ampat archipelago, Indonesia. The species is protected regionally and nationally and is currently managed as a single homogeneous population with…
View article: Preliminary Monitoring of Whale Shark (Rhincodon typus) Migration Patterns in the Waters Botubarani Village Gorontalo Based on Satellite Marker Monitoring
Preliminary Monitoring of Whale Shark (Rhincodon typus) Migration Patterns in the Waters Botubarani Village Gorontalo Based on Satellite Marker Monitoring Open
This research aims to determine the migration patterns of Whale Sharks using satellite markers in the waters of Botubarani Village, Bone Bolango Regency, Gorontalo Province. This research was conducted from April 2023 to December 2023 usin…
View article: Tomiyamichthys elliotensis, a new species of shrimpgoby (Teleostei: Gobiidae) from Lady Elliot Island, Queensland, Australia
Tomiyamichthys elliotensis, a new species of shrimpgoby (Teleostei: Gobiidae) from Lady Elliot Island, Queensland, Australia Open
A new species of gobiid fish, Tomiyamichthys elliotensis, is described from Lady Elliot Island at the southern end of Australia’s Great Barrier Reef, on the basis of 6 specimens, 32.6–52.7 mm SL. Diagnostic features include a sail-like fir…
View article: Eviota atauroensis, a new dwarfgoby (Teleostei: Gobiidae) from Timor-Leste
Eviota atauroensis, a new dwarfgoby (Teleostei: Gobiidae) from Timor-Leste Open
A new species of dwarfgoby, Eviota atauroensis n. sp. is described from Berau Bay, Atauro Island, Timor-Leste. The new species is distinguished by having the cephalic sensory-canal pore system lacking only the IT pore (Pattern 2); a dorsal…
View article: Eviota taeiae, a new dwarfgoby (Teleostei: Gobiidae) of the Eviota guttata complex from Samoa
Eviota taeiae, a new dwarfgoby (Teleostei: Gobiidae) of the Eviota guttata complex from Samoa Open
A new species of dwarfgoby, Eviota taeiae n. sp. is described from Nuusafee Island, Samoa. The new species is a member of the Eviota guttata complex that includes E. guttata, E. teresae, and E. albolineata, and is characterized by a comple…
View article: Population estimates of photo-identified individuals using a modified POPAN model reveal that Raja Ampat’s reef manta rays are thriving
Population estimates of photo-identified individuals using a modified POPAN model reveal that Raja Ampat’s reef manta rays are thriving Open
The 6.7-million-hectare Raja Ampat archipelago is home to Indonesia’s largest reef manta ray ( Mobula alfredi ) population and a representative network of nine marine protected areas (MPAs). However, the population dynamics of M. alfredi i…
View article: Eviota fluctiphila, a new dwarfgoby from the western Pacific Ocean (Teleostei: Gobiidae)
Eviota fluctiphila, a new dwarfgoby from the western Pacific Ocean (Teleostei: Gobiidae) Open
A new species of dwarfgoby, Eviota fluctiphila, n. sp., is described from the western Pacific Ocean. It has a complete cephalic sensory-canal pore system (pattern 1), dorsal/anal-fin formula of usually 8/8, some pectoral-fin rays branched,…
View article: Diving into the vertical dimension of elasmobranch movement ecology
Diving into the vertical dimension of elasmobranch movement ecology Open
Knowledge of the three-dimensional movement patterns of elasmobranchs is vital to understand their ecological roles and exposure to anthropogenic pressures. To date, comparative studies among species at global scales have mostly focused on…
View article: A global atlas of potential thermal refugia for coral reefs generated by internal gravity waves
A global atlas of potential thermal refugia for coral reefs generated by internal gravity waves Open
Coral reefs are highly threatened by ocean warming and the majority are likely to be lost in less than three decades. A first step in maximizing reef conservation through this period is to identify where coral reefs are more likely to surv…
View article: Residency and Use of an Important Nursery Habitat, Raja Ampat’s Wayag Lagoon, by Juvenile Reef Manta Rays (Mobula alfredi)
Residency and Use of an Important Nursery Habitat, Raja Ampat’s Wayag Lagoon, by Juvenile Reef Manta Rays (Mobula alfredi) Open
The behaviour and spatial use patterns of juvenile manta rays within their critical nursery habitats remain largely undocumented. Here, we report on the horizontal movements and residency of juvenile reef manta rays ( Mobula alfredi ) at a…
View article: Foraging habitat characterization of green sea turtles, Chelonia mydas, in the Cenderawasih Bay, Papua, Indonesia: Insights from satellite tag tracking and seagrass survey
Foraging habitat characterization of green sea turtles, Chelonia mydas, in the Cenderawasih Bay, Papua, Indonesia: Insights from satellite tag tracking and seagrass survey Open
Tapilatu RF, Wona H, Mofu B, Kolibingso D, Alzair N, Erdmann M, Marunaya B. 2022. Foraging habitat characterization of green sea turtles, Chelonia mydas, in the Cenderawasih Bay, Papua, Indonesia: Insights from satellite tag tracking and s…
View article: Global collision-risk hotspots of marine traffic and the world’s largest fish, the whale shark
Global collision-risk hotspots of marine traffic and the world’s largest fish, the whale shark Open
Significance Global vessel traffic is increasing alongside world economic growth. The potential for rising lethal ship strikes on endangered species of marine megafauna, such as the plankton-feeding whale shark, remains poorly understood s…
View article: How Big Is That Manta Ray? A Novel and Non-Invasive Method for Measuring Reef Manta Rays Using Small Drones
How Big Is That Manta Ray? A Novel and Non-Invasive Method for Measuring Reef Manta Rays Using Small Drones Open
This study explores the application of small, commercially available drones to determine morphometric the measurements and record key demographic parameters of reef manta rays (Mobula alfredi) in Raja Ampat, Indonesia. DJI Mavic 2 Pro dron…
View article: Diving into the vertical dimension of elasmobranch movement ecology
Diving into the vertical dimension of elasmobranch movement ecology Open
Knowledge of the three-dimensional movement patterns of elasmobranchs is vital to understanding their ecological roles and exposure to anthropogenic pressures. To date, comparative studies among species at global scales have mostly focused…