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Spawn and development of the olivid gastropod Olivancillaria carcellesi from north Patagonia, Argentina Invertebr. Biol. (IF 1.2) Pub Date : 2024-03-16 Soledad Zabala, Valeria Teso, Pablo E. Penchaszadeh, Andrés Averbuj
Olivancillaria carcellesi occurs in shallow sandy shores from north Patagonia, in intertidal and subtidal sandy bottoms. Females of O. carcellesi exhibited a remarkable specificity for spawning on the shells of living males and females, indiscriminately, of the buccinanopsid Buccinastrum deforme, measuring 26.9 ± 4.7 mm in shell length. The egg capsule was semispherical and attached to B. deforme shells
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Sex-specific gene expression in eastern oyster, Crassostrea virginica, gonad and mantle tissues Invertebr. Biol. (IF 1.2) Pub Date : 2024-02-07 Dina A. Proestou, Thomas A. Delomas, Mary E. Sullivan, Kathryn Markey Lundgren
The eastern oyster (Crassostrea virginica) is a protandrous hermaphrodite of commercial importance. As with many marine invertebrates, little is known about sex determination and differentiation systems in this species. Such knowledge has important implications not only for understanding the evolution of sex but also for applied questions in aquaculture. In order to examine mechanistic differences
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Using museum collections to explore predator–prey relationships in snail-eating beetles (Carabidae: Cychrini) Invertebr. Biol. (IF 1.2) Pub Date : 2023-12-28 Carl N. Keiser, Robert Davidson, Timothy A. Pearce
The vast majority of species interactions in nature go unnoticed because they occur under circumstances unamenable to observation. This is unfortunate, as our understanding of trophic ecology is predicated on our ability to quantify the nature and magnitude of species interactions. Here, we use specimens from museums and private collections to estimate prey breadth and morphological patterns between
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Issue Information Invertebr. Biol. (IF 1.2) Pub Date : 2023-12-23
No abstract is available for this article.
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Hemocytes from neonates of Biomphalaria glabrata are functionally less mature than those from adult snails Invertebr. Biol. (IF 1.2) Pub Date : 2023-12-19 John T. Sullivan
Gastropod molluscs, which serve as obligatory intermediate hosts for digenetic trematodes, possess an internal defense system (IDS) consisting of phagocytic hemocytes and plasma factors. This IDS is responsible for resistance to infection with larval trematodes, which are encapsulated and killed by hemocytes in incompatible snails. Like other physiological systems, the IDS probably undergoes maturation
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Dispersal movements of non-native and native terrestrial slugs in an urban environment Invertebr. Biol. (IF 1.2) Pub Date : 2023-12-15 Daniel Nyqvist, Gabriella Ritchey, Johan Watz
Animal movement varies from undirected dispersal to directed migration. Movement rates may have implications for conservation and resource management, as well as pest control, and they play a key role in invasion success. In slugs, long-distance dispersal is typically passive, whereas active movement is critical for local dispersal and determines access to resources such as food and shelter. Telemetry
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Chemosensory afference in the tentacle nerve of Lymnaea stagnalis Invertebr. Biol. (IF 1.2) Pub Date : 2023-11-05 Carmen C. Ucciferri, Russell C. Wyeth
Although the neural control of behavior has been extensively studied in gastropods, basic gaps remain in our understanding of how sensory stimuli are processed. In particular, there is only patchy evidence regarding the functional roles of sense organs and the extensive peripheral nervous system they contain. Our goal was to use extracellular electrophysiological recordings to confirm the chemosensory
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Variability of cnidae within a small clonal sea anemone (Isactinia sp.) Invertebr. Biol. (IF 1.2) Pub Date : 2023-11-03 Katrina L. Kaposi, Michela L. Mitchell, Robert L. Courtney, Jamie E. Seymour
The cnidom and intraspecific variability of cnidae within the small sea anemone Isactinia sp. were verified. The specific cnidae within the cnidom of four discrete morphological structures (tentacle, actinopharynx, mesenterial filaments, and body column) within Isactinia sp. was investigated. Microbasic b-mastigophores, microbasic p-mastigophores, basitrichs, microbasic p-amastigophores, and spirocysts
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Investigating the developmental onset of regenerative potential in the annelid Capitella teleta Invertebr. Biol. (IF 1.2) Pub Date : 2023-10-19 Alicia A. Boyd, Elaine C. Seaver
An animal's ability to regrow lost tissues or structures can vary greatly during its life cycle. The annelid Capitella teleta exhibits posterior, but not anterior, regeneration as juveniles and adults. In contrast, embryos display only limited replacement of specific tissues. To investigate when during development individuals of C. teleta become capable of regeneration, we assessed the extent to which
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Development and sexual dimorphism of branchiae in Streblospio benedicti Invertebr. Biol. (IF 1.2) Pub Date : 2023-10-17 Caitlin Segarra, Elizabeth R. McCain
The Spionidae is one of the largest and most studied annelid families, but to date, the development and differentiation of post-metamorphic anatomy have not been documented. This study used scanning electron microscopy to examine the development of the branchiae, presumed respiratory organs, in Streblospio benedicti. Branchiae in this species are prominent, paired head structures and first appear around
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Issue Information Invertebr. Biol. (IF 1.2) Pub Date : 2023-09-05
No abstract is available for this article.
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Foraging on sand particles: Coatings of soft radular teeth (Paludomidae, Gastropoda, Mollusca) Invertebr. Biol. (IF 1.2) Pub Date : 2023-08-30 Wencke Krings, Stanislav N. Gorb
The radula is the ingesta-gathering structure in Mollusca. As interface, it has to perform various tasks without functional deterioration caused by wear. Wear prevention is well investigated in mollusks that forage on rocks and that generate high punctual pressure with their hard teeth, which contain high inorganic contents at their tips. In mollusks that forage on softer substrate, such as sand surfaces
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Size, but not sex, predicts pinch force and exoskeleton mechanical properties in crayfish of the genus Faxonius Invertebr. Biol. (IF 1.2) Pub Date : 2023-08-14 Derek M. Benson, Ethan D. Clotfelter
Studies of animal weaponry and defensive structures rarely take into consideration their underlying mechanical properties. We measured the compressive strength and thickness of the exoskeleton of the claw (chela) in two North American crayfish species, Faxonius virilis and F. limosus. We performed similar measures on the carapace, a body region not directly involved in agonistic contests. Males of
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Issue Information Invertebr. Biol. (IF 1.2) Pub Date : 2023-06-16
No abstract is available for this article.
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Messages in the mucus: Selection of land snail resting sites based on the presence of mucus from conspecifics and other species Invertebr. Biol. (IF 1.2) Pub Date : 2023-06-07 Elizabeth A. Bergey, Idara J. Atakpo, Nissi K. Benni, Braxton Bohrofen, Cassidy H. Boyce
Mucus is applied to substrates as snails move and when they rest. Beyond the use of mucus in movement and adhesion, the wide array of chemicals in mucus allows for supplemental use in communication. This communication is apparent in trail-following behavior. This study addresses the potential communication via mucus in selecting resting sites in a laboratory assay. In a series of six experiments, individuals
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Reproductive characteristics and gamete development of the soft coral Sclerophytum cf. heterospiculatum in Okinawa Island, Japan Invertebr. Biol. (IF 1.2) Pub Date : 2023-06-04 Emmeline A. Jamodiong, James Davis Reimer
Sexual reproduction data are important to understand how organisms can replenish their populations and proliferate on coral reefs. Despite the importance of such data, the reproductive characteristics of most soft coral species are still unknown. Here, we examined the reproductive strategies of a species from the often-dominant genus Sclerophytum in a coral reef on subtropical Okinawa Island, Japan
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Evidence that flatheaded mayflies (Heptageniidae) serve as the likely paratenic host for Chordodes morgani (Nematomorpha) in Nebraska Invertebr. Biol. (IF 1.2) Pub Date : 2023-06-01 John F. Shea, Anna Sniezek, James Marchant
Hairworms (Nematomorpha) have indirect life cycles that require a terrestrial arthropod definitive host and an aquatic arthropod host that serves as a paratenic host, transferring the hairworm from the aquatic to the terrestrial environment. The life cycles for most hairworms remain unknown, especially the paratenic host. The hairworm Chordodes morgani lays its eggs on sticks, which are susceptible
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Histological analysis of oogenesis and ovarian development of the pharaoh cuttlefish, Sepia pharaonis Invertebr. Biol. (IF 1.2) Pub Date : 2023-05-30 Zihan Zhang, Qicheng Chen, Xiamin Jiang, Qingxi Han, Ruibing Peng, Hailong Pan, Maowang Jiang
The pharaoh cuttlefish, Sepia pharaonis, has become a commercially cultured cephalopod in coastal southeast China. However, information on the reproductive histology of this species remains limited. To describe its reproductive development, this study investigated the ovarian structure and oogenesis of S. pharaonis from hatchlings to the postbreeding stage using anatomical methods and histological
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Morphology and dynamic behavior of anal pores during defecation in the ctenophore Pleurobrachia pileus Invertebr. Biol. (IF 1.2) Pub Date : 2023-05-24 Sidney L. Tamm
Defecation in the lobate ctenophore Mnemiopsis leidyi was recently shown to occur periodically with an ultradian rhythm through a single transient anal pore which suddenly appeared, expelled waste, and disappeared afterward. To discover whether this novel method of defecation occurs in other kinds of ctenophores, I examined individuals of Pleurobrachia pileus and Beroe cucumis. Both ctenophores were
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Epibiosis and parasitism of coquina clam Donax spp.: Location, location, location! Invertebr. Biol. (IF 1.2) Pub Date : 2023-05-14 Eric J. McElroy, Kristina M. Hill-Spanik, Vincent A. Connors, Isaure de Buron
Cryptic species of coquina clams Donax fossor and D. variabilis carry the hydroid epibiont Lovenella gracilis and are infected with metacercariae of the monorchiid parasites Lasiotocus trachinoti and L. choanura. The associations among this host–epibiont–parasite system were investigated. Fifty clams were collected at low tide over 3 days in June 2020 in South Carolina from each of three groups: clams
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First report on the life history of the marine amphipod Ceradocus mizani and its implication for aquaculture Invertebr. Biol. (IF 1.2) Pub Date : 2023-04-28 Sharif Shahin, Victor Tosin Okomoda, Sairatul Dahlianis Ishak, Khor Waiho, Hanafiah Fazhan, Mohamad Nor Azra, B. Abdul Rahim Azman, Koraon Wongkamhaeng, Muyassar H. Abualreesh, Nadiah W. Rasdi, Hongyu Ma, Mhd Ikhwanuddin
The search for alternative live feed for aquaculture stocks has inspired research into marine amphipods. In this study, the life history of Ceradocus mizani was evaluated to better understand how this amphipod might be used in aquaculture as an alternative feed. The amphipods did not display copulatory behavior during the study period. The females were multivoltine and attained sexual maturity on average
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Issue Information Invertebr. Biol. (IF 1.2) Pub Date : 2023-03-20
No abstract is available for this article.
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Diversity and genetic connectivity of heteropod (Pterotracheoidea) gastropods in the Tropical Eastern Pacific Invertebr. Biol. (IF 1.2) Pub Date : 2023-03-14 Rachel Collin, Maycol Madrid, Dagoberto E. Venera-Pontón, Kenneth S. Macdonald, Alexandra De León, Dubravka Vrdoljak, Michael J. Boyle, Peter Bryant, Tim Arehart, Amy C. Driskell
Previous research focusing on pelagic gastropods in the open ocean has demonstrated that many morphospecies comprise multiple distinct clades or cryptic species that can be distinguished with DNA sequence data. To date, the genetic diversity of the pelagic gastropod fauna of the tropical East Pacific, especially in shallow coastal waters, remains largely unexplored. To document the diversity of pterotracheoids
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Fine structure of the retrocerebral organ in the rotifer Trichocerca similis (Monogononta) Invertebr. Biol. (IF 1.2) Pub Date : 2023-03-10 Rick Hochberg, Thiago Q. Araújo, Elizabeth J. Walsh, Jonathon E. Mohl, Robert L. Wallace
The retrocerebral organ (RCO) is a complex glandular system that is widely distributed across species of phylum Rotifera (sensu stricto). This system is hypothesized to secrete mucus that aids in benthic locomotion, adhesion, and/or reproduction. Unfortunately, the ultrastructure of the RCO is mostly unknown, having only been partially examined in one species. We used transmission electron microscopy
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Molluscs, morphology, and metaphor in Pablo Neruda's STEAMiest poem Invertebr. Biol. (IF 1.2) Pub Date : 2023-03-08 Marjorie Wonham, Curtis Wasson
The growing enthusiasm for STEAM (STEM + Arts) initiatives reflects the rich potential for inquiry and integration between arts and sciences. Biologically informed poetry is an active interdisciplinary area of creation and analysis that requires biologically attuned illustration and translation to retain its STEAM effectiveness across linguistic barriers. Pablo Neruda, Chilean poet and Nobel laureate
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Characterization of hemocytes from the marine amphipod Parhyale hawaiensis (Dana 1853): Setting the basis for immunotoxicological studies Invertebr. Biol. (IF 1.2) Pub Date : 2023-03-02 Amanda dos Santos, Marina Tenório Botelho, Willian Reina Joviano, Vicente Gomes, José Roberto Machado Cunha da Silva, Gisela de Aragão Umbuzeiro
Hemocytes are circulating blood cells that play a crucial function in amphipods and other crustacean immune systems. The hemocytes of the marine tropical amphipod Parhyale hawaiensis have been used for the evaluation of DNA damage and micronuclei, but they have not been characterized in the scientific literature. The aim of this study was to describe the hemolymph cells of P. hawaiensis and study their
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Effects of ocean acidification on the early life history processes of the breadcrumb sponge Halichondria panicea Invertebr. Biol. (IF 1.2) Pub Date : 2023-02-27 Alissa J. Rickborn, Caroline K. Glidden, Bruce A. Menge
Ocean acidification (OA) is predicted to result in reduced survival, growth, reproduction, and overall biodiversity of marine invertebrates, and yet we lack information about the response to OA of some major groups of marine organisms. In particular, we know relatively little about how OA will impact temperate sponges, which will experience more extreme low pH conditions than tropical species. In this
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Transcriptome analysis of the Mizuhopecten yessoensis gills under high temperature fluctuations Invertebr. Biol. (IF 1.2) Pub Date : 2023-02-05 Danyang Li, Yang Liu, Ying Tian, Junxia Mao, Xubo Wang, Yaqing Chang, Zhenlin Hao
Temperature is one of the environmental factors affecting the physiological activities of aquatic animals. This study explored the gene expression and regulation mechanism in the gill tissues of the scallop Mizuhopecten yessoensis under the stress of high temperature fluctuations. We designed a high temperature fluctuation experiment, in which the water temperature was raised from 20°C to 23°C and
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Study on foraging mechanism of leeches with different feeding habits based on chemoreception and foraging behavior Invertebr. Biol. (IF 1.2) Pub Date : 2023-02-01 Yixiu Miao, Qiaosheng Guo, Hongzhuan Shi, Jia Wang, Liyuan Guo
The leeches Whitmania pigra and Hirudo nipponia live in similar environments but have different feeding habits. At present, there are few studies of the foraging mechanism of leeches with different feeding habits. In this study, we first used maze tests to show that these two species of leeches could locate and distinguish their prey through chemosensory activity without mechanical stimulation. However
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Issue Information Invertebr. Biol. (IF 1.2) Pub Date : 2022-12-02
No abstract is available for this article.
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Changes in the cell composition of the hemolymph in the snail Planorbarius corneus after infection with the trematode Plagiorchis sp. Invertebr. Biol. (IF 1.2) Pub Date : 2022-11-23 Maria K. Serebryakova, Arina S. Tokmakova, Elena E. Prokhorova, Gennady L. Ataev
We found two functional populations of hemocytes in the hemolymph of the pulmonate snail Planorbarius corneus: hyalinocytes and granulocytes. The hyalinocytes were much more numerous than granulocytes. Each population was subdivided into subpopulations based on morphological and functional characteristics. The hyalinocyte population was represented by two subpopulations differing in size, granularity
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A trapdoor spider, Latouchia typica (Araneae: Halonoproctidae), uses vibrational cues as a trigger for predatory behavior Invertebr. Biol. (IF 1.2) Pub Date : 2022-11-21 Shoyo Nakamura, Hiromi Mukai, Makoto Tokuda
Spiders are one of the most dominant predators in terrestrial ecosystems. Although cues triggering predatory behavior in web-building and wandering spiders are well investigated, studies concerning burrowing species, the most ancestral group of spiders, are relatively limited. To clarify critical cues affecting the predatory behavior in burrowing species, we conducted vibration-reducing experiments
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Morphological coupling of the distal organ in the Peruvian walking stick (Oreophoetes peruana): Structural and functional aspects Invertebr. Biol. (IF 1.2) Pub Date : 2022-11-14 Johannes Strauß
In insects, the detection of mechanical stimuli from body movements, airborne sound, substrate vibration, medium flow, or gravity by mechanosensory organs plays an important role. These mechanosenory organs can have complex morphologies with numerous sensilla, and the functional morphology with specific attachments of the sensory neurons to surrounding tissues and structures determines the stimulation
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Reproductive cycles of the oviparous sponges Cinachyrella apion (Spirophorida) and Tethya maza (Tethyida) in a tropical intertidal environment Invertebr. Biol. (IF 1.2) Pub Date : 2022-11-14 Vivian Vasconcellos, Emilio Lanna
Environmental factors are constantly changing in the intertidal region. Consequently, the various benthic organisms that densely colonize this ocean area had to adapt to these constant changes. Reproductive strategy might be considered one of these adaptations. However, knowledge about this aspect of the biology of marine invertebrates is still contentious for some groups, especially with regard to
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Hydrodynamic role of substrate attachment in shaping the suspension-feeding current created by the marine gastropod Crepidula fornicata Invertebr. Biol. (IF 1.2) Pub Date : 2022-11-02 Houshuo Jiang, Jan A. Pechenik
As in lamellibranch bivalves, individuals of the common Atlantic slippersnail Crepidula fornicata beat cilia on their gill filaments to produce a suspension-feeding current. Having only one shell and no siphons with which to direct water flow, however, individuals of C. fornicata must adhere to a solid substrate to facilitate normal feeding. Thus, what hydrodynamic role does substrate attachment play
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Effect of the invasion history of the giant African snail (Lissachatina fulica) on its realized climatic niche Invertebr. Biol. (IF 1.2) Pub Date : 2022-10-28 Angie Patiño-Montoya, Alan Giraldo, Rosana Tidon
There is almost a century of difference among Indo-Malayan, Australasian, and Neotropical regions in establishment of non-native populations of the giant African snail (Lissachatina fulica). Using potential distribution models and environmental principal component analysis (PCA-env), we first tested whether an expansion of the realized climatic niche of L. fulica occurred. The models showed geographical
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Reproductive biology of the bathyal asteroid Ctenodiscus crispatus in the northeastern Pacific Invertebr. Biol. (IF 1.2) Pub Date : 2022-10-17 Sinja Rist, Lauren N. Rice, Caitlin Q. Plowman, C. Tyler Fountain, Avery Calhoun, Christina Ellison, Craig M. Young
The mud star Ctenodiscus crispatus has a broad distribution from Arctic waters into the northern Atlantic and Pacific oceans. Populations in the Atlantic are well studied and show oocyte sizes indicative of continuous gametogenesis with aseasonal spawning. In contrast, knowledge on the reproductive biology of Pacific populations is lacking. Thus, this study aims to examine the reproduction of C. crispatus
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Issue Information Invertebr. Biol. (IF 1.2) Pub Date : 2022-09-02
No abstract is available for this article.
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The relationship between size and metabolic rate of juvenile crown of thorns starfish Invertebr. Biol. (IF 1.2) Pub Date : 2022-08-27 Dione J. Deaker, Maria Byrne
Despite the notoriety of the corallivorous crown of thorns starfish (COTS, Acanthaster sp.), with population outbreaks that decimate reefs throughout the Indo-Pacific, the physiology of the juvenile stage remains poorly understood. We determined the feeding rate and metabolic rate of juvenile COTS during their initial algae-eating stage. The metabolic rate of juveniles after their ontogenetic diet
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Differences in the expression of soluble proteins in freshwater and brackish-water ecotypes of the snail Theodoxus fluviatilis Invertebr. Biol. (IF 1.2) Pub Date : 2022-08-22 Amanda Alice Wiesenthal, Christian Müller, Dirk Albrecht, Jan-Peter Hildebrandt
The neritid snail Theodoxus fluviatilis has formed regional subgroups in northern Europe, where it appears in both freshwater (FW) and brackish water (BW) in coastal areas of the Baltic Sea. These ecotypes show clear differences in osmotolerance and in the modes of accumulating organic osmolytes under hyperosmotic stress. We reasoned that the expression patterns of soluble proteins in the two ecotypes
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Annotated checklist and genetic data for parasitic helminths infecting New Zealand marine invertebrates Invertebr. Biol. (IF 1.2) Pub Date : 2022-07-27 Jerusha Bennett, Robert Poulin, Bronwen Presswell
Parasitic helminths with complex life cycles require multiple hosts in a particular order to complete their life cycles. Although almost all helminths infect invertebrates at some point in their life cycle, we know very little about which species of invertebrates harbor parasites compared with what is known for vertebrates. In New Zealand, <1% of marine invertebrates that may be expected to host parasites
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A new species of deep-sea torquaratorid enteropneust (Hemichordata): A sequential hermaphrodite with exceptionally wide lips Invertebr. Biol. (IF 1.2) Pub Date : 2022-07-05 Nicholas D. Holland, Avery S. Hiley, Greg W. Rouse
Specimens of a new species of torquaratorid acorn worm (Hemichordata, Enteropneusta) were video recorded and subsequently collected at abyssal depths in the eastern North Pacific at sites ranging from Oregon to northern Mexico. These worms are described here as Yoda demiankoopi n. sp. by molecular and morphological methods. The new species differs from its only described congener, Yoda purpurata, in
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Issue Information Invertebr. Biol. (IF 1.2) Pub Date : 2022-06-15
No abstract is available for this article.
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Persistent companionships: The parasitic copepod community of the dolphinfish Coryphaena hippurus on the Ecuadorian coast Invertebr. Biol. (IF 1.2) Pub Date : 2022-06-10 Ana María Santana-Piñeros, Geormery Mera-Loor, Eduardo Suárez-Morales, David González-Solis, Yanis Cruz-Quintana
The common dolphinfish, Coryphaena hippurus, is an important and widespread fishing resource in tropical and subtropical latitudes. It harbors a diverse array of parasitic copepods, but data on their infection indices are quite limited worldwide. We analyzed its parasitic copepod community and infection indices based on the examination of 615 individuals of C. hippurus landed monthly on the coast of
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Meiofauna is an important, yet often overlooked, component of biodiversity in the ecosystem formed by Posidonia oceanica Invertebr. Biol. (IF 1.2) Pub Date : 2022-06-06 Guillermo García-Gómez, Álvaro García-Herrero, Nuria Sánchez, Fernando Pardos, Andrés Izquierdo-Muñoz, Diego Fontaneto, Alejandro Martínez
The ecosystem formed by the marine flowering plant Posidonia oceanica is a biodiversity reservoir and provides many ecosystem services in coastal Mediterranean regions. Marine meiofauna is also a major component of that biodiversity, and its study can be useful in addressing both theoretical and applied questions in ecology, evolution, and conservation. We review the meiofaunal diversity in the meadow
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Geoglomeris subterranea (Diplopoda, Glomerida, Glomeridae), the first morphologically non-specialized semiaquatic glomerid millipede? Invertebr. Biol. (IF 1.2) Pub Date : 2022-06-03 Beáta Valkay Haľková, Karel Tajovský, Jozef Grego, Martina Žurovcová, Andrej Mock
Geoglomeris subterranea Verhoeff 1908 is a small (2–3 mm), blind, and depigmented representative of the order Glomerida, with a predominantly Western European distribution. Towards Central Europe (the Czech Republic, Austria), the species is found only sporadically, and its occurrence is documented by a small number of individuals. Recently, we documented this species in three orographic units of Slovakia
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Oogenesis and embryogenesis in a cryptogenic species of calcareous sponge (Calcaronea, Heteropiidae) in the southwestern Atlantic Invertebr. Biol. (IF 1.2) Pub Date : 2022-05-23 Emilio Lanna, Michelle Klautau
Calcarea is a diverse group of sponges, in which individuals are generally small and found in cryptic habitats. These characteristics hamper the access to them and, consequently, the knowledge about several aspects of their biology, including reproduction. Little is known about many reproductive aspects of these sponges and broad generalizations are made upon few studied species. Therefore, investigations
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Evidence for spatial niche partitioning in the ectocommensal Symbion americanus (Cycliophora) on its lobster host, Homarus americanus (Arthropoda, Malacostraca) Invertebr. Biol. (IF 1.2) Pub Date : 2022-05-11 Shoyo Sato, Allison Law, Gonzalo Giribet
Symbion americanus is a microscopic marine invertebrate in the phylum Cycliophora that lives as an ectocommensal on the mouthparts of the American lobster, Homarus americanus. Previous phylogeographic work on S. americanus identified three lineages corresponding to one described and two potential new species, along with evidence of sympatry. But these studies did not explore whether individuals of
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Refining species boundaries among velvet worms (Onychophora, Peripatopsidae), with the description of two new species of Opisthopatus from South Africa Invertebr. Biol. (IF 1.2) Pub Date : 2022-04-12 Aaron Barnes, Savel R. Daniels
In the present study, two new species of velvet worm, Opisthopatus, from the Eastern Cape province of South Africa are described. We used both mitochondrial and nuclear DNA sequence data (cytochrome oxidase subunit I [COI] and 18S rRNA subunit [18S]) to explore the possibility that species boundaries in Opisthopatus have been underestimated. A previous fine-scale phylogeographic study of the velvet
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Tyrosine hydroxylase messenger RNA corroborates protein localization in the nervous system of the pond snail, Lymnaea stagnalis Invertebr. Biol. (IF 1.2) Pub Date : 2022-03-30 Alexander P. Young, Griffin A. Beach, Roger P. Croll, Daniel J. Jackson, Russell C. Wyeth
Catecholaminergic neurons are abundant in molluscs and are involved in a variety of behaviors such as feeding, respiration, learning, and locomotion. However, previous identification of these neurons has relied almost exclusively on immunohistochemistry using antibodies, which have not been fully validated for use in molluscs. We employed tissue-specific quantitative PCR in adults of Lymnaea stagnalis
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Occurrence, infestation rate, and spatiotemporal distribution of the African pea crab (Afropinnotheres monodi) inhabiting Mediterranean mussels (Mytilus galloprovincialis) from southern Portugal Invertebr. Biol. (IF 1.2) Pub Date : 2022-03-14 Agatha C. N. Santos, Paulo Vasconcelos, Fábio Pereira, David Piló, André N. Carvalho, Miguel B. Gaspar
The present study aimed to analyze the occurrence and prevalence, infestation rate and intensity, host–guest colonization pattern, morphometric relationships, and spatiotemporal distribution of the African pea crab (Afropinnotheres monodi) inhabiting the shell of Mediterranean mussels (Mytilus galloprovincialis) from the Algarve coast and Ria Formosa lagoon (southern Portugal). Sampling campaigns were
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Determinants of food selection by bivalve larvae Invertebr. Biol. (IF 1.2) Pub Date : 2022-03-14 Maria Rosa, Dianna K. Padilla
Selection of food particles for consumption by larvae impacts nutritional gain needed for growth, development, and metamorphosis. Past work has suggested that molluscan larvae are capable of collecting food within a narrow size range. Recent studies have found evidence of size-independent food selection in molluscan larvae, but relatively little is known about the characteristics of particles that
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Issue Information Invertebr. Biol. (IF 1.2) Pub Date : 2022-03-10
No abstract is available for this article.
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Pelagic larval polyclads that practice macrophagous carnivory Invertebr. Biol. (IF 1.2) Pub Date : 2022-02-18 George von Dassow, Cecili B. Mendes
Among polyclad flatworms, many species are known to develop indirectly via long-lived planktotrophic larvae, whereas the rest hatch as adult-like juveniles. Such adult-like hatchlings have been presumed to represent direct development. However, we report evidence that hatchling polyclads of several genera feed in the plankton on large prey. These ciliated swimmers, despite apparently lacking means
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Fitness-related traits are maximized in recently introduced, slow-growing populations of a global invasive clam Invertebr. Biol. (IF 1.2) Pub Date : 2022-02-16 Leandro A. Hünicken, Francisco Sylvester, Nicolás Bonel
Many species are shifting their ranges and being forced to rapidly respond to novel stressful environmental conditions. Colonizing individuals experience strong selective forces that favor the expression of life history traits notably affecting dispersal and reproductive rates in newly invaded habitats. Limited information is currently available on trait variation within the invasive range despite
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Hoplonemertean larvae are planktonic predators that capture and devour active animal prey Invertebr. Biol. (IF 1.2) Pub Date : 2022-02-12 George von Dassow, Cecili B. Mendes, Kara Robbins, Sónia C. S. Andrade, Svetlana A. Maslakova
The superficially simple ciliated planktonic larvae of hoplonemerteans have been assumed to be lecithotrophic direct developers, even though many develop from such small eggs that it is hard to imagine how they could give rise to a viable juvenile without some phase of larval feeding. Indeed, attempts to raise such larvae to settlement without food invariably fail. Observations that some hoplonemertean
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Issue Information Invertebr. Biol. (IF 1.2) Pub Date : 2021-12-13
No abstract is available for this article.
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Hemocyte activation and nodule formation in the giant keyhole limpet, Megathura crenulata Invertebr. Biol. (IF 1.2) Pub Date : 2021-12-07 Gary G. Martin, Stephanie Stamnes, Nicola Henderson, Juliette Lum, Nicole Rubin, Jonathan P. Williams
The giant keyhole limpet, Megathura crenulata, lives in rocky intertidal and subtidal environments along the Southern California coast, where it is exposed to viruses, bacteria, and other potential pathogens. We demonstrate that when exposed to bacteria or latex beads, hemocytes from specimens of M. crenulata in vivo and in vitro immediately become adhesive and form nodules. The rapid activation of
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Water content in diet affects growth and timing of female first mating, but not coloration, in the admirable grasshopper (Syrbula admirabilis) Invertebr. Biol. (IF 1.2) Pub Date : 2021-12-05 Iván de la Hera, Michael S. Reichert
Understanding how water limitation affects the performance of herbivorous insects is relevant in a context of worldwide alterations of rainfall regimes due to climate change. Apart from its influence on insect growth and development, water availability has also been considered a cue for color polyphenism in some species. This is the case of the grassland-inhabiting admirable grasshopper (Syrbula admirabilis)
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Corrigendum: Colony growth responses of the Caribbean octocoral, Pseudopterogorgia elisabethae, to harvesting. 122, 299–307 Invertebr. Biol. (IF 1.2) Pub Date : 2022-01-27 Emily Anderson, John Castanaro, Howard R. Lasker
In the article by Castanaro and Lasker (2003), errors were made in scaling of some of the images. The errors were discovered while examining the data for another project. We remeasured the photos and reanalyzed the data. Some results differed slightly from those reported in the original publication. Growth rates were generally higher than reported in the original analyses, and the proportion of branches