Results 21 to 30 of about 4,668 (201)

Estimation of growth parameters for the exploited sea cucumber Holothuria arguinensis from South Portugal [PDF]

open access: yes, 2018
Understanding how species grow is critical for choosing appropriate fisheries management strategies. Sea cucumbers shrink during periods of aestivation and have naturally flaccid bodies that make measuring growth difficult.
Erzini, Karim   +2 more
core   +1 more source

SeeCucumbers: Using Deep Learning and Drone Imagery to Detect Sea Cucumbers on Coral Reef Flats

open access: yesDrones, 2021
Sea cucumbers (Holothuroidea or holothurians) are a valuable fishery and are also crucial nutrient recyclers, bioturbation agents, and hosts for many biotic associates. Their ecological impacts could be substantial given their high abundance in some reef
Joan Y. Q. Li   +3 more
doaj   +1 more source

Spatial distribution patterns and movements of Holothuria arguinensis in the Ria Formosa (Portugal) [PDF]

open access: yes, 2015
Holothurian populations are under pressure worldwide because of increasing demand for beche-de-mer, mainly for Asian consumption. Importations to this area from new temperate fishing grounds provide economic opportunities but also raise concerns ...
Canovas, Fernando   +2 more
core   +1 more source

Origin of the holothurians (Echinodermata) derived by constructional morphology [PDF]

open access: yesFossil Record, 2002
According to a recent hypothesis, the holothurians originated by a process of extreme paedomorphism as "giant larvae", with "de novo" developed radial systems.
R. Haude
doaj   +5 more sources

Probabilistic ecological risk assessment for deep-sea mining: A Bayesian network for Chatham Rise, Pacific Ocean. [PDF]

open access: yesEcol Appl
Abstract Increasing interest in seabed resource use in the ocean is introducing new pressures on deep‐sea environments, the ecological impacts of which need to be evaluated carefully. The complexity of these ecosystems and the lack of comprehensive data pose significant challenges to predicting potential impacts.
Kaikkonen L   +7 more
europepmc   +2 more sources

Chiridota heheva—the cosmopolitan holothurian [PDF]

open access: yesMarine Biodiversity, 2020
AbstractChemosynthetic ecosystems have long been acknowledged as key areas of enrichment for deep-sea life, supporting hundreds of endemic species. Echinoderms are among the most common taxa inhabiting the periphery of chemosynthetic environments, and of these, chiridotid holothurians are often the most frequently observed.
Thomas, Elin A.   +9 more
openaire   +5 more sources

Molecular Networking-Based Analysis of Cytotoxic Saponins from Sea Cucumber Holothuria atra

open access: yesMarine Drugs, 2019
The saponin composition of a specimen of black sea cucumber, Holothuria atra collected in the Persian Gulf was studied by a combined approach including LC-MS/MS, Molecular Networking, pure compound isolation, and NMR spectroscopy. The saponin composition
Laura Grauso   +5 more
doaj   +1 more source

In Situ Holothurian Noncontact Counting System: A General Framework for Holothurian Counting [PDF]

open access: yesIEEE Access, 2020
Holothurian counting is a basic requirement in aquaculture. An in situ noncontact approach for holothurian counting is basically harmless, which makes such techniques an optimal choice for aquaculture monitoring. To develop an in situ noncontact counting system, there are two main challenges.
Xinliang Zhang   +5 more
openaire   +2 more sources

Bioaccumulation of Mercury and Other Trace Elements in the Edible Holothurian Holothuria (Halodeima) atra in Relation to Gold Mining Activities in North Sulawesi, Indonesia

open access: yesFrontiers in Marine Science, 2022
Artisanal and small-scale gold mines (ASGMs) have been accompanied by widespread usage of mercury amalgamation to extract gold from ores, putting Indonesia among the top three global emitters of this pollutant and posing potential risks to the marine ...
Marco Tamburini   +19 more
doaj   +1 more source

Reproductive biology of the sea cucumber Holothuria sanctori (Echinodermata: Holothuroidea)

open access: yesScientia Marina, 2012
The reproductive biology of the sea cucumber Holothuria sanctori was studied over 24 months (February 2009 to January 2011) at Gran Canaria through the gonad index and a combination of macro- and microscopic analysis of the gonads.
Pablo G. Navarro   +2 more
doaj   +1 more source

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