Latest News on Arthropoda Research: Dec – 2019

Semiochemical Parsimony in the Arthropoda

A wide type of arthropods have tailored their own semiochemicals to aid multiple functions in various contexts. Semiochemicals, the pheromones and allomones, are detected in invertebrate species in six orders, and it’s been clearly established that these compounds ar used with nice parsimony. the flexibility of those invertebrates in exploitation these natural merchandise for an out of this world diversity of functions emphasizes the importance of semiochemicals within the organic process biology of the Arthropoda. [1]

First molecular evidence for the existence of a Tardigrada + Arthropoda clade.

The complete 18S rDNA factor sequence of Macrobiotus cluster hufelandi (Tardigrada) was obtained and aligned with 18S rDNA and rRNA factor sequences of twenty four metazoans (mainly protostomes). distinct character (maximum-parsimony) and distance (neighbor-joining) strategies were wont to infer their biological process. The evolution of bootstrap proportions with sequence length (pattern of resolved nodes, PRN) was studied to check the resolution of the nodes in neighbor-joining trees. The results show that arthropods square measure monophyletic. Tardigrades represent the sister cluster of arthropods (in parsimony analyses) or they’re connected with crustaceans (distance analysis and PRN). phylum Arthropoda square measure divided into 2 main organic process lines, the Insecta + class Crustacea line (weakly supported), and also the family + class line. [2]

Chemosensory Grazing by Marine Calanoid Copepods (Arthropoda: Crustacea)

In laboratory experiments, mixed populations of 2 marine copepods (Acartia clausi Associate in Nursingd Eurytemora herdmani) once fed artificial food particles consisting of microcapsules that were either enriched with an encapsulated material of present plant or nonenriched preferentially eaten the enriched capsules. Beads or nonenriched capsules were either rarely eaten or not eaten in the slightest degree. The observations demonstrate that filter-feeding in these species could be a behavioural method, beneath sensory management, which the copepods ar able to discriminate between enriched and nonenriched food particles. [3]

The Cælom and the Vascular System of Mollusca and Arthropoda 1

THE object of the author was to ascertain the very fact that the system of blood-containing areas pervasive the body in Mollusca and in phylum Arthropoda wasn’t, as typically (and so usually) supposed, admire the bodily cavity or perivisceral house of such animals because the Chætopoda and also the Vertebrata, however was essentially a distended and on an irregular basis swollen tube system— the equivalent of the blood-vascular system of Chætopoda and Vertebrata. therefore he projected to decision the body-spaces of Mollusca and phylum Arthropoda “hæmocœl,” in distinction to “cœlom.” [4]

Diptera (Arthropoda: Insecta) of Potential Importance in Human and Animal Health in Bayelsa State, Nigeria

The insect animal order has typically been thought-about because the Medical and Veterinary order, as a result of it contains families that have an effect on humans and animals directly and indirectly. the main focus on insect borne diseases in Bayelsa State had been on protozoal infection, though the contiguous States of Rivers and Delta, with similar vegetation, topography and climate contain foci of different dipteran-borne diseases: Human African Trypanosomiasis (HAT), humour disease (LF) however none of those had been extensively studied in Bayelsa State. it absolutely was thus set to research the incidence of dipterans of potential importance in human and animal health in Bayelsa State. Five sites, 3 in fresh swamp forest (Sagbama, Odi, Sampou) and 2 within the Rhizophora mangle swamp forest (Nembe, Igopiri) were hand-picked. [5]

Reference

[1] Blum, M.S., 1996. Semiochemical parsimony in the Arthropoda. Annual review of entomology, 41(1), (Web Link)

[2] Giribet, G., Carranza, S., Baguna, J., Riutort, M. and Ribera, C., 1996. First molecular evidence for the existence of a Tardigrada+ Arthropoda clade. Molecular Biology and Evolution, 13(1), (Web Link)

[3] Poulet, S.A. and Marsot, P., 1978. Chemosensory grazing by marine calanoid copepods (Arthropoda: Crustacea). Science, 200(4348), (Web Link)

[4] The Cælom and the Vascular System of Mollusca and Arthropoda 1
Nature volume 37, (Web Link)

[5] I. Agedah, V., Aline E. Noutcha, M., O. Umeozor, C. and N. Okiwelu, S. (2017) “Diptera (Arthropoda: Insecta) of Potential Importance in Human and Animal Health in Bayelsa State, Nigeria”, Journal of Advances in Biology & Biotechnology, 11(4), (Web Link)

Leave a Reply

Your email address will not be published. Required fields are marked *