scholarly journals EXCESS POTASSIUM INDUCES LARVAL METAMORPHOSIS IN FOUR MARINE INVERTEBRATE SPECIES

1986 ◽  
Vol 170 (2) ◽  
pp. 255-266 ◽  
Author(s):  
ANDREA J. YOOL ◽  
SUSAN M. GRAU ◽  
MICHAEL G. HADFIELD ◽  
REBECCA A. JENSEN ◽  
DOUGLAS A. MARKELL ◽  
...  
Keyword(s):  
Marine Invertebrate ◽  
Larval Metamorphosis ◽  
Invertebrate Species

The predation of trumpet shell, Charonia sp., on eight different marine invertebrate species

2004 ◽  
Vol 35 (13) ◽  
pp. 1202-1206 ◽  
Author(s):  
Kyoung Ho Kang ◽  
Jae Min Kim
Keyword(s):  
Marine Invertebrate ◽  
Invertebrate Species

Egg Size Distributions Among Closely Related Marine Invertebrate Species: Are They Bimodal or Unimodal?

1981 ◽  
Vol 118 (5) ◽  
pp. 749-755 ◽  
Author(s):  
Frank E. Perron ◽  
Robert H. Carrier
Keyword(s):  
Egg Size ◽  
Marine Invertebrate ◽  
Size Distributions ◽  
Invertebrate Species

scholarly journals Toxicity responses for marine invertebrate species of brazilian occurrence

2019 ◽  
Vol 14 (1) ◽  
pp. 15-25
Author(s):  
Artal M.C. ◽  
Santos A. ◽  
Dornelas L.L. ◽  
Vannuci-Silva M. ◽  
Vacchi F.I. ◽  
...  
Keyword(s):  
Marine Invertebrate ◽  
Invertebrate Species

scholarly journals Viromes in Marine Ecosystems Reveal Remarkable Invertebrate RNA Virus Diversity

2021 ◽  
Author(s):  
Yu-Yi Zhang ◽  
Yicong Chen ◽  
Xiaoman Wei ◽  
Jie Cui
Keyword(s):  
Rna Viruses ◽  
Rna Virus ◽  
Marine Invertebrate ◽  
Ecological Factors ◽  
Virus Evolution ◽  
Marine Ecosystems ◽  
Invertebrate Species ◽  
Virus Diversity ◽  
First Time ◽  
Special Notice

AbstractOcean viromes remain poorly understood and little is known about the ecological factors driving aquatic RNA virus evolution. In this study, we used a meta-transcriptomic approach to characterize the viromes of 58 marine invertebrate species across three seas. This revealed the presence of 315 newly identified RNA viruses in nine viral families or orders (Durnavirales, Totiviridae, Bunyavirales, Hantaviridae, Picornavirales, Flaviviridae, Hepelivirales, Solemoviridae and Tombusviridae), with most of them are sufficiently divergent to the documented viruses. With special notice that we first time revealed an ocean virus rooting to mammalian hantaviruses. We also found evidence for possible host sharing and switch events during virus evolution. In sum, we demonstrated the hidden diversity of marine invertebrate RNA viruses.

Mytilus protamine-like sperm-specific protein genes are multicopy, dispersed, and closely associated with hypervariable RFLP regions

Genome ◽  
1998 ◽  
Vol 41 (4) ◽  
pp. 587-596 ◽  
Author(s):  
Daniel D Heath ◽  
Thomas J Hilbish
Keyword(s):  
Southern Blot ◽  
Gene Sequence ◽  
Marine Invertebrate ◽  
Specific Protein ◽  
Southern Analysis ◽  
Single Individual ◽  
Southern Blots ◽  
Invertebrate Species ◽  
Marine Mussels

Protamine-like sperm packaging proteins replace somatic histones during spermatogenesis, and although the proteins have been well-characterized in many marine invertebrate species, little is known of the arrangement of the genes. The research described here was designed to determine the sequence and structure of the protamine-like PL-III (or "1") gene in marine mussels (Mytilus spp). The PL-III sequence was found to be extremely variable not only among the closely related Mytilus species, but also within species and populations. The variation observed among eight PL-III sequences from a single individual indicated that PL-III was probably multiple-copied. Southern analysis confirmed that PL-III, and another protamine-like gene, (PL-II), were multicopy and dispersed, as well as associated with a hypervariable element. Some PL-III genes are also arranged in nontandem clusters, and the spacer regions are probably the source of the hypervariable nature of the Southern blots. The arrangement of the protamine-like genes in Mytilus appears to be closer to that reported for histones than protamines; however, their association with a hypervariable element is novel.Key words: mussels, histones, protamine, gene sequence, Southern blot.

scholarly journals Metamorphosis of a Scleractinian Coral in Response to Microbial Biofilms

2004 ◽  
Vol 70 (2) ◽  
pp. 1213-1221 ◽  
Author(s):  
Nicole S. Webster ◽  
Luke D. Smith ◽  
Andrew J. Heyward ◽  
Joy E. M. Watts ◽  
Richard I. Webb ◽  
...  
Keyword(s):  
Community Structure ◽  
Coral Reef ◽  
Scleractinian Coral ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Marine Invertebrate ◽  
Principal Component ◽  
Coralline Algae ◽  
Larval Metamorphosis ◽  
Microbial Biofilms ◽  
Wide Range

ABSTRACT Microorganisms have been reported to induce settlement and metamorphosis in a wide range of marine invertebrate species. However, the primary cue reported for metamorphosis of coral larvae is calcareous coralline algae (CCA). Herein we report the community structure of developing coral reef biofilms and the potential role they play in triggering the metamorphosis of a scleractinian coral. Two-week-old biofilms induced metamorphosis in less than 10% of larvae, whereas metamorphosis increased significantly on older biofilms, with a maximum of 41% occurring on 8-week-old microbial films. There was a significant influence of depth in 4- and 8-week biofilms, with greater levels of metamorphosis occurring in response to shallow-water communities. Importantly, larvae were found to settle and metamorphose in response to microbial biofilms lacking CCA from both shallow and deep treatments, indicating that microorganisms not associated with CCA may play a significant role in coral metamorphosis. A polyphasic approach consisting of scanning electron microscopy, fluorescence in situ hybridization (FISH), and denaturing gradient gel electrophoresis (DGGE) revealed that coral reef biofilms were comprised of complex bacterial and microalgal communities which were distinct at each depth and time. Principal-component analysis of FISH data showed that the Alphaproteobacteria, Betaproteobacteria, Gammaproteobacteria, and Cytophaga-Flavobacterium of Bacteroidetes had the largest influence on overall community composition. A low abundance of Archaea was detected in almost all biofilms, providing the first report of Archaea associated with coral reef biofilms. No differences in the relative densities of each subdivision of Proteobacteria were observed between slides that induced larval metamorphosis and those that did not. Comparative cluster analysis of bacterial DGGE patterns also revealed that there were clear age and depth distinctions in biofilm community structure; however, no difference was detected in banding profiles between biofilms which induced larval metamorphosis and those where no metamorphosis occurred. This investigation demonstrates that complex microbial communities can induce coral metamorphosis in the absence of CCA.

scholarly journals Effects of a bacteria-produced algicide on non-target marine invertebrate species

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Victoria E. Simons ◽  
Kathryn J. Coyne ◽  
Mark E. Warner ◽  
Margaret M. Dolan ◽  
Jonathan H. Cohen
Keyword(s):  
Harmful Algal Blooms ◽  
Algal Blooms ◽  
Laboratory Experiments ◽  
Early Stage ◽  
Marine Invertebrate ◽  
Eastern Oyster ◽  
Activity Level ◽  
Marine Systems ◽  
Invertebrate Species ◽  
Respiration Rates

AbstractHarmful algal blooms (HABs) affect both freshwater and marine systems. Laboratory experiments suggest an exudate produced by the bacterium Shewanella sp. IRI-160 could be used to prevent or mitigate dinoflagellate blooms; however, effects on non-target organisms are unknown. The algicide (IRI-160AA) was tested on various ontogenetic stages of the copepod Acartia tonsa (nauplii and adult copepodites), the blue crab Callinectes sapidus (zoea larvae and megalopa postlarvae), and the eastern oyster Crassostrea virginica (pediveliger larvae and adults). Mortality experiments with A. tonsa revealed that the 24-h LC50 was 13.4% v/v algicide for adult females and 5.96% for early-stage nauplii. For C. sapidus, the 24-h LC50 for first-stage zoeae was 16.8%; results were not significant for megalopae or oysters. Respiration rates for copepod nauplii increased in the 11% concentration, and in the 11% and 17% concentrations for crab zoeae; rates of later stages and oysters were unaffected. Activity level was affected for crab zoeae in the 1%, 11%, and 17% treatments, and for oyster pediveliger larvae at the 17% level. Activity of later stages and of adult copepods was unaffected. Smaller, non-target biota with higher surface to volume could be negatively impacted from IRI-160AA dosing, but overall the taxa and stages assayed were tolerant to the algicide at concentrations required for dinoflagellate mortality (EC50 =  ~ 1%).

scholarly journals Natural history collections recapitulate 200 years of faunal change

2021 ◽  
Vol 8 (4) ◽  
Author(s):  
Christine Ewers-Saucedo ◽  
Andreas Allspach ◽  
Christina Barilaro ◽  
Andreas Bick ◽  
Angelika Brandt ◽  
...  
Keyword(s):  
Natural History ◽  
Cross Validation ◽  
Marine Invertebrate ◽  
Species Introductions ◽  
Faunal Change ◽  
Invertebrate Species ◽  
The North ◽  
Natural History Collections ◽  
Biodiversity Changes

Changing species assemblages represent major challenges to ecosystems around the world. Retracing these changes is limited by our knowledge of past biodiversity. Natural history collections represent archives of biodiversity and are therefore an unparalleled source to study biodiversity changes. In the present study, we tested the value of natural history collections for reconstructing changes in the abundance and presence of species over time. In total, we scrutinized 17 080 quality-checked records for 242 epibenthic invertebrate species from the North and Baltic Seas collected throughout the last 200 years. Our approaches identified eight previously reported species introductions, 10 range expansions, six of which are new to science, as well as the long-term decline of 51 marine invertebrate species. The cross-validation of our results with published accounts of endangered species and neozoa of the area confirmed the results for two of the approaches for 49 to 55% of the identified species, and contradicted our results for 9 to 10%. The results based on relative record trends were less validated. We conclude that, with the proper approaches, natural history collections are an unmatched resource for recovering early species introductions and declines.

scholarly journals Spatial distribution in marine invertebrates in rocky shore of Araucania Region (38° S, Chile)

2020 ◽  
Vol 80 (2) ◽  
pp. 362-367
Author(s):  
P. De los Ríos ◽  
E. Carreño
Keyword(s):  
Spatial Distribution ◽  
Distribution Pattern ◽  
Negative Binomial Distribution ◽  
Binomial Distribution ◽  
Rocky Shore ◽  
Negative Binomial ◽  
Marine Invertebrate ◽  
Benthic Fauna ◽  
Rocky Shores ◽  
Invertebrate Species

Abstract The rocky shores in Chile have a wide invertebrate species diversity, that include species with marked abundances in determined regions. The aim of the present study is to analyse the spatial distribution pattern in different marine invertebrate species in rocky shore of Araucania region, considering if these species have random, uniform or associated patterns, and extrapolate if these patterns have Poisson, binomial or negative binomial distribution respectively. The results revealed the presence mainly of gastropods molluscs that would graze on benthic algae, these species have mainly aggregated pattern that has a robust negative binomial distribution pattern. The obtained results agree with observations for marine benthic fauna that mentioned the presence of aggregated pattern, has negative binomial distribution. Other ecological topics about spatial distribution were discussed.

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