CRUSTACES
CRUSTACES
CRUSTACES
This article shows that the excrement of krill and salps has a major influence on the carbon cycle. Declining krill populations limit the ocean's "carbon sink" capacity in the face of anthropogenic discharges
Analyses of mitochondrial genes provide a better understanding of the phylogenetic links between the major shrimp groups. Classification within these groups is still incomplete.
With global warming, ocean temperature and salinity are set to rise. This has a negative effect on crustacean populations, which could rapidly decline by 10%. Yet they are essential to food webs.
Castaño-SánchezA., Hose, G.C. & ReboleiraA.S.P.S. Salinity and temperature increase impact groundwater crustaceans. Sci Rep 10, 12328 (2020)
Crustaceans come in a bewildering variety of shapes, sizes and lifestyles. There's even a crustacean that uses venom to hunt: Speleonectes tulumensis. Its astonishing ability was discovered in 2013, long after the species had first described.
Matt Kaplan. First venomous crustacean discovered. Nature News - Springer Nature Oct 22, 2013
Overexploitation of certain crustacean species can lead to rapid selective pressures. Increasingly consumed by humans, coconut crabs, for example, are getting smaller and smaller.
Yorisue, T., Iguchi, A., YasudaN. et al. Evaluating the effect of overharvesting on genetic diversity and genetic population structure of the coconut crab. Sci Rep 10, 10026 (2020)
Ocean acidification disrupts the growth of the shells of many crustaceans; it also seems to limit the movement of the larvae of large crustaceans such as lobsters.
GravineseP.M., Page, H.N., Butler, C.B. et al. Ocean acidification disrupts the orientation of postlarval Caribbean spiny lobsters. Sci Rep 10, 18092 (2020)
Ocean acidification disrupts the growth of the shells of many crustaceans; it also seems to limit the movement of the larvae of large crustaceans such as lobsters.
Gravinese, P.M., Page, H.N., Butler, C.B. et al. Ocean acidification disrupts the orientation of postlarval Caribbean spiny lobsters. Sci Rep 10, 18092 (2020)
Lobsters produce audible sounds (with equipment) miles underwater. This is a good opportunity to monitor these important but declining animals, without disturbing them.
Jézéquel, Y., ChauvaudL. & Bonnel, J. Spiny lobster sounds can be detectable over kilometres underwater. Sci Rep 10, 7943 (2020).
The pink shrimp is the most common of all shrimps. Yet it continues to amaze scientists with the discovery of an Atlantic subspecies that differs genetically from the Mediterranean one. An important fact for the breeding and conservation of these species.
González-Castellano, I., González-LópezJ., González-TizónA.M. et al. Genetic diversity and population structure of the rockpool shrimp Palaemon elegans based on microsatellites: evidence for a cryptic species and differentiation across the Atlantic-Mediterranean transition. Sci Rep 10, 10784 (2020)
Deep-sea crustaceans ingest plastic waste and degrade it into nanoplastics. These harmful elements are found in most deep-sea crustaceans caught, but also in the entire food chain.
Taylor, M., GwinnettC., Robinson, L. et al. Plastic microfibre ingestion by deep-sea organisms. Sci Rep 6, 33997 (2016)
Some crustaceans, such as lobsters and crayfish, have a very powerful magnetic sense of direction. They can find their starting point with an internal internal compass.
Boles, L., Lohmann, K. True navigation and magnetic maps in spiny lobsters. Nature 421, 60-63 (2003)
Lobsters are able to avoid the diseases of their conspecifics by detecting them and excluding them from social groups. This detection is effective, as the avoided individuals may be asymptomatic carriers.
BehringerD., Butler, M. & Shields, J. Avoidance of disease by social lobsters. Nature 441, 421 (2006)
Lobsters are affected by overfishing, which is rapidly reducing their population. The creation of marine protected areas is an effective way of preserving these populations.
Cau, A., BellodiA., Cannas, R. et al. European spiny lobster recovery from overfishing enhanced through active restocking in Fully Protected Areas. Sci Rep 9, 13025 (2019)
Some crustacean species are rare and difficult to inventory as adults. One of the most popular techniques nowadays is the identification of larval samples (which are easier to obtain).
PalecandaS., Feller, K.D. & Porter, M.L. Using larval barcoding to estimate stomatopod species richness at Lizard Island, Australia for conservation monitoring. Sci Rep 10, 10990 (2020)
This article shows that the moulting cycle of the Krill, and therefore movements play a major role in the transport of carbons to different geographical areas. This underlines the importance of krill in ecosystems.
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