Results 31 to 40 of about 4,156 (127)

Behaviour of mesopredatory coral reef fishes in response to threats from sharks and humans

open access: yesScientific Reports, 2023
Both sharks and humans present a potentially lethal threat to mesopredatory fishes in coral reef systems, with implications for both population dynamics and the role of mesopredatory fishes in reef ecosystems.
A. Asunsolo-Rivera   +6 more
doaj   +1 more source

At the Turn of the Tide: Space Use and Habitat Partitioning in Two Sympatric Shark Species Is Driven by Tidal Phase

open access: yesFrontiers in Marine Science, 2020
Coexistence of ecologically similar species occupying the same geographic location (sympatry) poses questions regarding how their populations persist without leading to competitive exclusion.
James S. E. Lea   +15 more
doaj   +1 more source

Parasitic nematodes of marine fishes from Palmyra Atoll, East Indo-Pacific, including a new species of Spinitectus (Nematoda, Cystidicolidae) [PDF]

open access: yesZooKeys, 2019
Here, we present the results of a taxonomic survey of the nematodes parasitizing fishes from the lagoon flats of Palmyra Atoll, Eastern Indo-Pacific. We performed quantitative parasitological surveys of 653 individual fish from each of the 44 species ...
David González-Solís   +9 more
doaj   +3 more sources

An Observation of Mating in Free-Ranging Blacktip Reef Sharks, Carcharhinus melanopterus. [PDF]

open access: yes, 2010
v. ill. 23 cm.QuarterlyWe describe the mating behavior of free-ranging Blacktip Reef Sharks, Carcharhinus melanopterus, at Palmyra Atoll. This is the first primary report of mating in C.
McCauley, Douglas J.   +2 more
core   +1 more source

Functional anatomy, jaw mechanisms, and feeding behavior of Dunkleosteus terrelli (Placodermi, Arthrodira)

open access: yesThe Anatomical Record, Volume 309, Issue 10, Page 2574-2635, October 2026.
A new musculoskeletal reconstruction and revision of the cranio‐mandibular anatomy of the Devonian arthrodire placoderm Dunkleosteus terrelli from a comparative and functional anatomical perspective. Dunkleosteus is a specialized arthrodire with many specializations for feeding on large vertebrates, and many of its features are part of broader ...
Russell K. Engelman   +4 more
wiley   +1 more source

Carcharhinus Blainville 1816

open access: yes, 2021
Genus Carcharhinus Blainville, 1816 Whaler Sharks Carcharhinus (subgenus of Squalus) Blainville, 1816: 121. Type species: Carcharias melanopterus Quoy & Gaimard, 1824, by subsequent designation of the ICZN.
Kyne, Peter M.   +2 more
core   +1 more source

Environmental DNA Reveals Distinct Regions of Extraordinary Marine Biodiversity to Inform a Newly Established Marine Park—Exmouth Gulf, Western Australia

open access: yesDiversity and Distributions, Volume 32, Issue 9, September 2026.
ABSTRACT Aim Exmouth Gulf, Western Australia, is a globally significant refuge for many marine megafauna species. The recent designation of a marine park in Exmouth Gulf underscores its environmental, social and cultural significance but remains a site of competing interests.
Jessica R. Pearce   +7 more
wiley   +1 more source

Global Patterns and Drivers of Climate Vulnerability in Sharks and Rays: A Reassessment Using the IRACC Framework

open access: yesAquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 7, July 2026.
ABSTRACT Climate vulnerability in sharks and rays is unevenly distributed across habitats and ecological groups, reflecting differences in exposure pathways and biological constraints. Using an updated application of the Integrated Risk Assessment for Climate Change (IRACC) framework, we conducted a global reassessment of climate vulnerability for 95 ...
Ava Graham, Daniel M. Moore
wiley   +1 more source

Histology of the retinas of the Pacific sharks Carcharhinus melanopterus and Triaenodon obesus [PDF]

open access: yes, 1962
This thesis is concerned with the retinal histology of two species of sharks which have wide Indo-Pacific distribution, the blacktip shark Carcharhinus melanopterus (Quoy and Gaimard) of the family Carcharhinidae, and the whltetip shark Triaenodon obesus
Kato, Susumu
core   +1 more source

Tracking Fin‐Prints on Reef Flats: A Genus‐Specific eDNA Metabarcoding Assay for Epaulette Sharks (Hemiscyllium spp.) With Field Validation in Raja Ampat

open access: yesEnvironmental DNA, Volume 8, Issue 3, May–June 2026.
This study developed and validated the first genus‐specific eDNA assay for epaulette sharks (Hemiscyllium spp.), targeting the NADH4 gene. Field application in Raja Ampat detected H. freycineti at six of seven locations, including one location (Dayan) where daytime visual surveys failed, demonstrating this tool's value for monitoring protected species.
Danang Ambar Prabowo   +10 more
wiley   +1 more source

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