Steven H. D. Haddock
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View article: Population genomics of a sailing siphonophore reveals genetic structure in the open ocean
Population genomics of a sailing siphonophore reveals genetic structure in the open ocean Open
The open ocean is a vast, highly connected environment, and the organisms found there have been hypothesized to represent massive, well-mixed populations. Of these, the man-o'-war or bluebottle (Physalia) is uniquely suited to long-distanc…
View article: A Chromosome-Scale Genome of Nanomia septata Reveals Extensive Rearrangement But No Clear Driver of the Unique Colony-Level Organization of Siphonophores
A Chromosome-Scale Genome of Nanomia septata Reveals Extensive Rearrangement But No Clear Driver of the Unique Colony-Level Organization of Siphonophores Open
Siphonophores (Cnidaria:Hydrozoa) are pelagic colonial marine invertebrates with many highly specialized bodies (zooids) within a single colony. Their unique biology and ecological importance have made them of particular interest. Recent w…
View article: Global Genomics of Man-O'-War (Physalia) Reveals Ocean Surface Biodiversity
Global Genomics of Man-O'-War (Physalia) Reveals Ocean Surface Biodiversity Open
View article: Unexpected diversity and novel lineages in the cosmopolitan genus Nanomia (Cnidaria: Siphonophorae: Physonectae)
Unexpected diversity and novel lineages in the cosmopolitan genus Nanomia (Cnidaria: Siphonophorae: Physonectae) Open
Integrated use of molecular and morphological methods reveals unexpected diversity in the cosmopolitan siphonophore genus Nanomia. Species delimitation analyses based on COI and 16S sequences suggest up to three distinct lineages in additi…
View article: Homeocurvature adaptation of phospholipids to pressure in deep-sea invertebrates
Homeocurvature adaptation of phospholipids to pressure in deep-sea invertebrates Open
Hydrostatic pressure increases with depth in the ocean, but little is known about the molecular bases of biological pressure tolerance. We describe a mode of pressure adaptation in comb jellies (ctenophores) that also constrains these anim…
View article: Fluorescence patterns and diversity of hydrozoans from Bocas del Toro, Panama
Fluorescence patterns and diversity of hydrozoans from Bocas del Toro, Panama Open
Many metazoans contain molecules capable of fluorescence, the absorption and re-emission of light. Since the anatomical distribution, or patterning, of these molecules is variable across taxa, patterns of fluorescence may serve as a powerf…
View article: Systematic Distribution of Bioluminescence in Marine Animals: A Species-Level Inventory
Systematic Distribution of Bioluminescence in Marine Animals: A Species-Level Inventory Open
Bioluminescence is the production of visible light by an organism. This phenomenon is particularly widespread in marine animals, especially in the deep sea. While the luminescent status of numerous marine animals has been recently clarifie…
View article: Accelerating Marine UAV Drone Image Analysis with Sliced Detection and Clustering (MBARI SDCAT)
Accelerating Marine UAV Drone Image Analysis with Sliced Detection and Clustering (MBARI SDCAT) Open
Uncrewed Aerial Vehicles (UAVs) can be a cost-effective solution for capturing a comprehensive view of surface ocean phenomena to study marine population dynamics and ecology. UAVs have several advantages, such as quick deployment from sho…
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Issue Information Open
No abstract is available for this article.
View article: Life in the Midwater: The Ecology of Deep Pelagic Animals
Life in the Midwater: The Ecology of Deep Pelagic Animals Open
The water column of the deep ocean is dark, cold, low in food, and under crushing pressures, yet it is full of diverse life. Due to its enormous volume, this mesopelagic zone is home to some of the most abundant animals on the planet. Rath…
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No abstract is available for this article.
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No abstract is available for this article.
View article: Issue Information
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No abstract is available for this article.
View article: Ancient gene linkages support ctenophores as sister to other animals
Ancient gene linkages support ctenophores as sister to other animals Open
A central question in evolutionary biology is whether sponges or ctenophores (comb jellies) are the sister group to all other animals. These alternative phylogenetic hypotheses imply different scenarios for the evolution of complex neural …
View article: Giants among Cnidaria: large nuclear genomes and rearranged mitochondrial genomes in siphonophores
Giants among Cnidaria: large nuclear genomes and rearranged mitochondrial genomes in siphonophores Open
Siphonophores (Cnidaria:Hydrozoa) are abundant predators found throughout the ocean and are important components in worldwide zooplankton. They range in length from a few centimeters to tens of meters. They are gelatinous, fragile, and dif…
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No abstract is available for this article.
View article: Speciation of pelagic zooplankton: Invisible boundaries can drive isolation of oceanic ctenophores
Speciation of pelagic zooplankton: Invisible boundaries can drive isolation of oceanic ctenophores Open
The study of evolution and speciation in non-model systems provides us with an opportunity to expand our understanding of biodiversity in nature. Connectivity studies generally focus on species with obvious boundaries to gene flow, but in …
View article: Three Distinct Views of Deep Pelagic Community Composition Based on Complementary Sampling Approaches
Three Distinct Views of Deep Pelagic Community Composition Based on Complementary Sampling Approaches Open
Our perception of deep-sea communities has evolved as various sampling approaches have captured different components of deep-sea habitats. We sampled midwater zooplankton assemblages in Monterey Bay, California to quantify community compos…
View article: Correction to ‘Moving conferences online: lessons learned from an international virtual meeting’
Correction to ‘Moving conferences online: lessons learned from an international virtual meeting’ Open
View article: Integrating siphonophores into marine food‐web ecology
Integrating siphonophores into marine food‐web ecology Open
Siphonophores are a clade of understudied colonial hydrozoans (Cnidaria) that are abundant predators in oceanic ecosystems, with species present across the water column. We (1) synthesize current knowledge about siphonophore trophic ecolog…
View article: Hidden diversity of Ctenophora revealed by new mitochondrial COI primers and sequences
Hidden diversity of Ctenophora revealed by new mitochondrial COI primers and sequences Open
[Definitive version of this article may be found here ] The mitochondrial gene cytochrome-c-oxidase subunit 1 (COI) is useful in many taxa for phylogenetics, population genetics, metabarcoding, and rapid species identifications. However, t…
View article: Depth- and temperature-specific fatty acid adaptations in ctenophores from extreme habitats
Depth- and temperature-specific fatty acid adaptations in ctenophores from extreme habitats Open
Animals are known to regulate the composition of their cell membranes to maintain key biophysical properties in response to changes in temperature. For deep-sea marine organisms, high hydrostatic pressure represents an additional, yet much…
View article: Moving conferences online: lessons learned from an international virtual meeting
Moving conferences online: lessons learned from an international virtual meeting Open
We consider the opportunities and challenges associated with organizing a conference online, using a case study of a medium-sized (approx. 400 participants) international conference held virtually in August 2020. In addition, we present qu…
View article: A chromosome-scale genome assembly and karyotype of the ctenophore <i>Hormiphora californensis</i>
A chromosome-scale genome assembly and karyotype of the ctenophore <i>Hormiphora californensis</i> Open
Here, we present a karyotype, a chromosome-scale genome assembly, and a genome annotation from the ctenophore Hormiphora californensis (Ctenophora: Cydippida: Pleurobrachiidae). The assembly spans 110 Mb in 44 scaffolds and 99.47% of the b…
View article: Honing in on bioluminescent milky seas from space
Honing in on bioluminescent milky seas from space Open
Milky seas are a rare form of marine bioluminescence where the nocturnal ocean surface produces a widespread, uniform and steady whitish glow. Mariners have compared their appearance to a daylit snowfield that extends to all horizons. Enco…
View article: Protect high seas biodiversity
Protect high seas biodiversity Open
The high seas—marine areas beyond
\nnational jurisdiction (1)—cover nearly half
\nof Earth’s surface (2). The high seas support
\nour planet in countless ways, from
\nregulating the climate, to feeding millions
\nof people, to supporting i…
View article: Two swimming modes in Trachymedusae; bell kinematics and the role of giant axons
Two swimming modes in Trachymedusae; bell kinematics and the role of giant axons Open
Although members of the Rhopalonematidae family (Cnidaria, Hydrozoa, Trachymedusae) are known to exhibit unusually powerful jet swimming in addition to their more normal slow swimming behaviour, for the most part, reports are rare and anec…
View article: A sticky thicket of glue cells: A comparative morphometric analysis of colloblasts in 20 species of comb jelly (phylum Ctenophora)
A sticky thicket of glue cells: A comparative morphometric analysis of colloblasts in 20 species of comb jelly (phylum Ctenophora) Open
Ctenophores in the class Tentaculata are distinct from Cnidarians in that they use sticky, not stinging, tentacles to capture and subdue their prey. The structures that make these tentacles sticky are colloblasts, specialized multicellular…