نتایج جستجو برای: uroteuthis duvaucelii
تعداد نتایج: 81 فیلتر نتایج به سال:
Noctiluca scintillans, a heterotrophic unarmored unicellular bioluminescent dinoflagellate, occurs widely in the oceans, often as a bloom. Molecular phylogenetic analysis based on 18S ribosomal DNA sequences consistently has placed this species on the basal branch of dinoflagellates. Here, we report that the structural organization of its luciferase gene is strikingly different from that of the...
Cephalopods are ecologically and economically important marine groups in the world. Biodiversity description is essential for sustainable utilization of natural resources to characterize biological entities conservation. DNA barcoding an effective tool used identification organisms at species level been widely delineate several ambiguity species. In this study, partial sequence mitochondrial cy...
The toxicity of Cnidaria is a subject of concern due to its influence on humans. In particular, jellyfish blooms can highly affect human economical activities, such as bathing, fishery, tourism, etc., as well as the public health. Stinging structures of Cnidaria (nematocysts) produce remarkable effects on human skin, such as erythema, swelling, burning and vesicles, and at times further severe ...
The Pearl River Estuary (PRE) is one of the major fishing grounds for squid Uroteuthis chinensis. Taking that into consideration, this study analyzes environmental effects on spatiotemporal variability U. chinensis in PRE, basis Generalized Additive Model (GAM) and Clustering Fishing Tactics (CFT), using satellite situ observations. Results show 63.1% total variation Catch Per Unit Effort (CPUE...
With the purpose to make a review on the red tides occurence at mexican coasts, previous studies were analyzed. Dinoflagellates seem to be the main cause of toxic events mainly Gonyaulax polygramma, Gymnodinium catenatum, Pyrodinium bahamense var. compressum and Ptychodiscus brevis. There are other species which cause red tides but are not toxic. They are: Mesodinium rubrum, Gonyaulax triacanth...
In recent years, jellyfish blooms have attracted considerable scientific interest for their potential impacts on human activities and ecosystem functioning, with much attention paid to jellyfish as predators and to gelatinous biomass as a carbon sink. Other than qualitative data and observations, few studies have quantified direct predation of fish on jellyfish to clarify whether they may repre...
The order Noctilucales or class Noctiluciphyceae encompasses three families of aberrant dinoflagellates (Noctilucaceae, Leptodiscaceae and Kofoidiniaceae) that, at least in some life stages, lack typical dinoflagellate characters such as the ribbon-like transversal flagellum or condensed chromosomes. Noctiluca scintillans, the first dinoflagellate to be described, has been intensively investiga...
Male glow-worms Lampyris noctiluca find their bioluminescent mates at night by phototaxis. There is good evidence that location of mates by lampyrid beetles is achieved by a single spectral class of photoreceptor, whose spectral sensitivity is tuned to the bioluminescent spectrum emitted by conspecifics, and is achromatic. We ask whether glow-worm phototaxis involves interactions between two sp...
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