Seaweed secondary metabolites as antifoulants: effects of Dictyota spp. diterpenes on survivorship, settlement, and development of marine invertebrate larvae

Chemoecology ◽  
1998 ◽  
Vol 8 (3) ◽  
pp. 125-131 ◽  
Author(s):  
Tim M. Schmitt ◽  
Niels Lindquist ◽  
Mark E. Hay
Keyword(s):  
Secondary Metabolites ◽  
Marine Invertebrate ◽  
Invertebrate Larvae

Physiology of Larval Feeding

2018 ◽  
Keyword(s):  
Growth And Development ◽  
Marine Invertebrate ◽  
Larval Growth ◽  
Circulatory System ◽  
Future Research ◽  
Larval Feeding ◽  
Digestive Physiology ◽  
Larval Body ◽  
The Individual ◽  
Invertebrate Larvae

The functional properties of marine invertebrate larvae represent the sum of the physiological activities of the individual, the interdependence among cells making up the whole, and the correct positioning of cells within the larval body. This chapter examines physiological aspects of nutrient acquisition, digestion, assimilation, and distribution within invertebrate larvae from an organismic and comparative perspective. Growth and development of larvae obviously require the acquisition of “food.” Yet the mechanisms where particulate or dissolved organic materials are converted into biomass and promote development of larvae differ and are variably known among groups. Differences in the physiology of the digestive system (secreted enzymes, gut transit time, and assimilation) within and among feeding larvae suggest the possibility of an underappreciated plasticity of digestive physiology. How the ingestion of seawater by and the existence of a circulatory system within larvae contribute to larval growth and development represent important topics for future research.

The induction of metamorphosis of marine invertebrate larvae: stimulus and response

1983 ◽  
Vol 61 (8) ◽  
pp. 1701-1719 ◽  
Author(s):  
Robert D. Burke
Keyword(s):  
Direct Evidence ◽  
Marine Invertebrate ◽  
Behavioral Model ◽  
Environmental Cues ◽  
Sensory Receptors ◽  
Response Model ◽  
Endocrine Control ◽  
Stimulus Response ◽  
Invertebrate Larvae ◽  
Induction Of Metamorphosis

The induction of metamorphosis by environmentally derived cues is reviewed in barnacles, molluscs, hydroids, echinoids, and ascidians in the context of the neurological and behavioral model of stimulus and response. The model proposes that cues associated with preferred juvenile or adult habitats are the stimuli. Stimuli are received by receptors that communicate with the effectors of metamorphosis, larval and adult tissues. The response is a combination of morphogenetic, histolytic, and histogenic processes. Receptors in all five taxa are assumed to be superficial sensory receptors, though there is no direct evidence for their involvement in the perception of cues. Although the induction of metamorphosis by environmental cues in all five taxa fits well within a stimulus–response model, there is currently only circumstantial evidence for neural or endocrine control of metamorphosis.

Size-Specific Predation on Marine Invertebrate Larvae

2008 ◽  
Vol 214 (1) ◽  
pp. 42-49 ◽  
Author(s):  
Jonathan D. Allen
Keyword(s):  
Marine Invertebrate ◽  
Invertebrate Larvae

scholarly journals Antitumor Anthraquinones from an Easter Island Sea Anemone: Animal or Bacterial Origin?

Marine Drugs ◽  
2019 ◽  
Vol 17 (3) ◽  
pp. 154 ◽  
Author(s):  
Ignacio Sottorff ◽  
Sven Künzel ◽  
Jutta Wiese ◽  
Matthias Lipfert ◽  
Nils Preußke ◽  
...  
Keyword(s):  
Natural Products ◽  
Secondary Metabolites ◽  
Antitumor Activity ◽  
Genome Analysis ◽  
New Genus ◽  
Marine Invertebrate ◽  
Easter Island ◽  
Sea Anemone ◽  
Producer Strain ◽  
Marine Actinobacteria

The presence of two known anthraquinones, Lupinacidin A and Galvaquinone B, which have antitumor activity, has been identified in the sea anemone (Gyractis sesere) from Easter Island. So far, these anthraquinones have been characterized from terrestrial and marine Actinobacteria only. In order to identify the anthraquinones producer, we isolated Actinobacteria associated with the sea anemone and obtained representatives of seven actinobacterial genera. Studies of cultures of these bacteria by HPLC, NMR, and HRLCMS analyses showed that the producer of Lupinacidin A and Galvaquinone B indeed was one of the isolated Actinobacteria. The producer strain, SN26_14.1, was identified as a representative of the genus Verrucosispora. Genome analysis supported the biosynthetic potential to the production of these compounds by this strain. This study adds Verrucosispora as a new genus to the anthraquinone producers, in addition to well-known species of Streptomyces and Micromonospora. By a cultivation-based approach, the responsibility of symbionts of a marine invertebrate for the production of complex natural products found within the animal’s extracts could be demonstrated. This finding re-opens the debate about the producers of secondary metabolites in sea animals. Finally, it provides valuable information about the chemistry of bacteria harbored in the geographically-isolated and almost unstudied, Easter Island.

The Distribution of Settled Larvae of the Bryozoans Alcyonidium Hirsutum (Fleming) and Alcyonidium Polyoum (Hassall) on Fucus Serratus L.

1974 ◽  
Vol 54 (3) ◽  
pp. 665-676 ◽  
Author(s):  
P. J. Hayward ◽  
Paul H. Harvey
Keyword(s):  
Aquatic Invertebrates ◽  
Marine Invertebrate ◽  
Substrate Selection ◽  
Sessile Invertebrates ◽  
Fucus Serratus ◽  
The Subject ◽  
Invertebrate Larvae ◽  
Experi Mental Result ◽  
Selection Of

The spatial settlement of marine invertebrate larvae is not a random process. The distribution of the adults of a particular species is influenced by the behavioural responses of the animal to a range of environmental stimuli which, in the case of many sessile invertebrates, result in the display of clear substrate selection. The role of habitat selection in determining the distribution of aquatic invertebrates has been the subject of a review by Meadows & Campbell (1972). The selection of algal substrata by the larvae of various intertidal species of Bryozoa has been demonstrated by Ryland (1959); among these, the ctenostomatous bryozoans Alcyonidium hirsutum and A. polyoum were shown to exhibit a strong preference for fronds of the alga Fucus serratus, an experi-mental result which accorded well with the distribution of the two species on the shore (Ryland, 1962).

scholarly journals Vision is highly sensitive to oxygen availability in marine invertebrate larvae

2019 ◽  
Vol 222 (10) ◽  
pp. jeb200899 ◽  
Author(s):  
Lillian R. McCormick ◽  
Lisa A. Levin ◽  
Nicholas W. Oesch
Keyword(s):  
Marine Invertebrate ◽  
Oxygen Availability ◽  
Highly Sensitive ◽  
Invertebrate Larvae
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