New records of sea cucumbers inhabiting Mar Menor coastal lagoon (SE Spain)

González‐Wangüemert, Mercedes; Domínguez-Godino, Jorge A.; Cánovas, Fernando

doi:10.1007/s12526-017-0660-0

Cited by 3 publications

(6 citation statements)

References 21 publications

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“…In recent years, the harvesting of sea cucumbers in the Mediterranean Sea has been showing signs of systematic overexploitation being negative impacts observed such as decreased density, abundance, and genetic diversity; loss of larger individuals; increased incidence of some diseases; and even "local extinction" in some places (Gonzaĺez-Wangüemert et al, 2018). Maggi and Gonzaĺez-Wangüemert (2015), studying P. regalis Mediterranean populations from the Spanish coast, suggested the negative effects of overexploitation on populations living off the Catalan coast.…”

Section: Discussionmentioning

confidence: 99%

“…The rising demand in Asian markets has resulted in the decline of many sea cucumber populations (Toral-Granda et al, 2008;Purcell et al, 2012;Eriksson and Clarke, 2015) and more than 70% of their stocks around the world were overexploited or depleted (Purcell et al, 2013). To address the problem of increasing market demands, many aquaculture practices have been developed in different parts of the world recently (Han et al, 2016;Gonzaĺez-Wangüemert et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Nowadays, large quantities of holothurians are caught in Greece, Turkey, and Spain (Meloni and Esposito, 2018). Turkey is the main Mediterranean country involved in the catch and export of frozen, dried, and salted sea cucumbers toward Asian countries, particularly the species belonging to the genus Holothuria (Aydin, 2008;Gonzaĺez-Wangüemert et al, 2014;Gonzalez-Wangüemert et al, 2015;Gonzaĺez-Wangüemert et al, 2018). In Greece, Holothuria (Holothuria) tubulosa (Gmelin, 1791) has been harvested as bait in long-line fisheries for more than a century (Antoniadou and Vafidis, 2011).…”

Section: Introductionmentioning

confidence: 99%

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How does climate change affect a fishable resource? The case of the royal sea cucumber (Parastichopus regalis) in the central Mediterranean Sea

et al. 2022

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Holothurians or sea cucumbers are key organisms in marine ecosystems that, by ingesting large quantities of sediments, provide important ecosystem services. Among them, Parastichopus regalis (Cuvier, 1817) is one of the living sea cucumbers in the Mediterranean actively fished for human consumption mainly in Spain, where it is considered a gastronomic delicacy. In the Strait of Sicily (central Mediterranean Sea), this species is not exploited for commercial use even if it is used as bait by longline fishery. P. regalis is frequently caught by bottom trawling and discarded at sea by fishers after catch, and because of its capacity to resist air exposition (at least in cold months), it is reasonable to consider that it is not affected by fishing mortality. Having observed a significant decrease in abundance since 2018, the possible effects of some ecological factors related to current climate change (i.e., temperature and pH) were sought. Generalized additive models (GAMs) were applied to investigate the relationship among the abundance of P. regalis and environmental variables and fishing effort. Long time series of P. regalis densities (2008–2021) were extracted from the MEDITS bottom trawling survey and modeled as function of environmental parameters (i.e., salinity, dissolved oxygen, ammonium, pH, and chlorophyll α) and fishing effort (i.e., total number of fishing days per gross tonnage). Our results showed that this species prefers the soft bottoms (50–200 m) of the Adventure Bank and Malta Plateau, and its distribution changed over time with a slight deepening and a rarefaction of spatial distribution starting from 2011 and 2017, respectively. In addition, a positive relationship with pH concentration in surface waters during the larval dispersal phase (3-year lag before the survey) and nutrient concentration at sea bottom (1-year lag) has been found, suggesting that this species is sensitive to climate change and food availability. This study adds new knowledge about the population dynamics of an unexploited stock of P. regalis under fishing impact and environmental under climate change in fisheries management.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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How does climate change affect a fishable resource? The case of the royal sea cucumber (Parastichopus regalis) in the central Mediterranean Sea

et al. 2022

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“…The high cost of trepang (generally between 50 to 600 US$ dry kg -1 ) (Purcell et al, 2012;Ram et al, 2014;Purcell, 2014), and the numerous medical applications of sea cucumbers, led to the overexploitation of most of the Indo-Pacific species (Lovatelli et al, 2004;Conand, 2006;Choo, 2008;Purcell et al, 2011;. In response to the market demand, the fishery of sea cucumbers have shifted to new target species as the Mediterranean ones (Gonzaĺez-Wangüemert et al, 2014;Gonzaĺez-Wangüemert et al, 2018). In many cases, the sea cucumber harvesting increased without an adequate management, which, coupled with the illegal catches, caused the collapse of several stocks (Toral-Granda et al, 2008;Anderson et al, 2011;Purcell, 2014, Gonzaĺez-Wangüemert et al, 2018Ramıŕez-Gonzaĺez et al, 2020a).…”

Section: Introductionmentioning

confidence: 99%

“…In response to the market demand, the fishery of sea cucumbers have shifted to new target species as the Mediterranean ones (Gonzaĺez-Wangüemert et al, 2014;Gonzaĺez-Wangüemert et al, 2018). In many cases, the sea cucumber harvesting increased without an adequate management, which, coupled with the illegal catches, caused the collapse of several stocks (Toral-Granda et al, 2008;Anderson et al, 2011;Purcell, 2014, Gonzaĺez-Wangüemert et al, 2018Ramıŕez-Gonzaĺez et al, 2020a). One of the main causes of the failure of sea cucumber management can also be a reflection of severe knowledge gaps on basic biological and ecological attributes, and their reproductive biology.…”

Section: Introductionmentioning

confidence: 99%

New insights upon the reproductive biology of the sea cucumber Holothuria tubulosa (Echinodermata, Holothuroidea) in the Mediterranean: Implications for management and domestication

et al. 2022

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Holothuria tubulosa is one of the most common sea cucumber species inhabiting the Mediterranean Sea. Due to its commercial interest for the international market, it has been harvested without proper management causing the overexploitation of its stocks. Inadequate management is also caused by lack of information on basic biology and ecology not allowing the estimating of the species vulnerability and resilience to growing anthropogenic pressures. In this paper, we have investigated basic life-history traits of H. tubulosa (population structure and reproductive cycle) in a population of Central-Western Mediterranean (Sardinia, Italy). A macroscopic maturity scale for both sexes was defined through an instrumental colorimetric analysis of the gonads and the ramification level of the gonad’s tubules, subsequently confirmed by histological analysis. The seasonal trend of the Gonado-Somatic Index, the changes in color of the gonads and tubules ramification indicated that the spawning period of H. tubulosa was concentrated in summer with a peak in late August, closely related to the increase in water temperature. A synchronous development of the gonads, with a unique and short reproductive event during the year, was also detected. In conclusion, this study provides new evidence on the biological and ecological features of H. tubulosa, essential data for developing a scientifically-based stock assessment as well as conservative management at a local scale. Finally, we provided basic information for the domestication of broodstock in a conservative hatchery.

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The First Report of Holothuria (Thymiosycia) impatiens (Forsskål, 1775), (Holothuroidea: Holothuriidae) from Tunisia (Mediterranean Sea): Taxonomic, Morphological, and Molecular Data Compilation

et al. 2023

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For the first time, specimens of Holothuria impatiens are reported from the Tunisian coast, supported by molecular (COI sequencing) and morphological (examination of ossicles) analyses. For comparative purposes, Holothuria impatiens samples were genetically analyzed with existing data from Spain, Italy, and the Red Sea. In addition to their external morphology, an external substance covering the individuals is described, besides the new ossicle structure described in the body wall of H. impatiens samples. The results of the morphometry of the specimens from the Tunisian coast revealed that, for two shapes of ossicles, the size of the individuals does not influence their structures. Low genetic diversity was observed in Tunisia, with two haplotypes; one of both haplotypes was reported for the first time exclusively in Tunisia. The phylogenetic tree showed that the haplotypes were shared across all locations, revealing that the Mediterranean and Red Sea individuals were clearly distinct. Further studies on the genetic diversity of H. impatiens are crucial for the evaluation of the singularity of Mediterranean populations.

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New records of sea cucumbers inhabiting Mar Menor coastal lagoon (SE Spain)

Cited by 3 publications

References 21 publications

How does climate change affect a fishable resource? The case of the royal sea cucumber (Parastichopus regalis) in the central Mediterranean Sea

How does climate change affect a fishable resource? The case of the royal sea cucumber (Parastichopus regalis) in the central Mediterranean Sea

New insights upon the reproductive biology of the sea cucumber Holothuria tubulosa (Echinodermata, Holothuroidea) in the Mediterranean: Implications for management and domestication

The First Report of Holothuria (Thymiosycia) impatiens (Forsskål, 1775), (Holothuroidea: Holothuriidae) from Tunisia (Mediterranean Sea): Taxonomic, Morphological, and Molecular Data Compilation

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