First results of embryonic development, spawning and larval rearing of the Mediterranean spider crab<i>M</i><i>aja squinado</i>(Herbst ) under laboratory conditions, a candidate species for a restocking program

Durán, Juana; Pastor, Elena; Grau, Amàlia; Valencia, José María

doi:10.1111/j.1365-2109.2011.02983.x

Cited by 8 publications

(3 citation statements)

References 32 publications

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“…Fishers listed several commercial and non-commercial species as depleted. In several cases, these results are in line with various quantitative information available ( Table S2 ) and other regional lists and bibliographic references [59] , [60] . Of the 43 species of fish listed as depleted, ten species were listed as data deficient (DD), near threatened (NT), vulnerable (VU) or endangered (EN) by IUCN [16] ( Table S2 ).…”

Section: Discussionsupporting

confidence: 87%

Assessing Fishing and Marine Biodiversity Changes Using Fishers' Perceptions: The Spanish Mediterranean and Gulf of Cadiz Case Study

Coll

Carreras²,

Ciércoles

et al. 2014

PLoS ONE

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BackgroundThe expansion of fishing activities has intensively transformed marine ecosystems worldwide. However, available time series do not frequently cover historical periods.MethodologyFishers' perceptions were used to complement data and characterise changes in fishing activity and exploited ecosystems in the Spanish Mediterranean Sea and Gulf of Cadiz. Fishers' interviews were conducted in 27 fishing harbours of the area, and included 64 fishers from ages between 20 to >70 years old to capture the experiences and memories of various generations. Results are discussed in comparison with available independent information using stock assessments and international convention lists.Principal FindingsAccording to fishers, fishing activity substantially evolved in the area with time, expanding towards deeper grounds and towards areas more distant from the coast. The maximum amount of catch ever caught and the weight of the largest species ever captured inversely declined with time. Fishers (70%) cited specific fishing grounds where depletion occurred. They documented ecological changes of marine biodiversity during the last half of the century: 94% reported the decline of commercially important fish and invertebrates and 61% listed species that could have been extirpated, with frequent mentions to cartilaginous fish. Declines and extirpations were in line with available quantitative evaluations from stock assessments and international conventions, and were likely linked to fishing impacts. Conversely, half of interviewed fishers claimed that several species had proliferated, such as cephalopods, jellyfish, and small-sized fish. These changes were likely related to trophic cascades due to fishing and due to climate change effects. The species composition of depletions, local extinctions and proliferations showed differences by region suggesting that regional dynamics are important when analysing biodiversity changes.Conclusions/SignificanceUsing fishers' perceptions, fishing and ecological changes in the study area were documented. The recovery of local ecological knowledge provides valuable information complementing quantitative monitoring and evaluation surveys.

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Section: Discussionsupporting

confidence: 87%

Assessing Fishing and Marine Biodiversity Changes Using Fishers' Perceptions: The Spanish Mediterranean and Gulf of Cadiz Case Study

Coll

Carreras²,

Ciércoles

et al. 2014

PLoS ONE

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“…Stevcic (1967) reported three broods for Maja squinado per year in the Adriatic Sea, between March and August. Similarly, laboratory experiments have shown that this species spawns between March and July (Durán et al 2011b) and that, at a water temperature of 18°C, it takes 4-5 days post-hatch to reach the zoea II stage, 9-10 days to reach the megalopa stage and 16-17 days after hatching to reach the first crab instar (Durán et al 2011a). The last zoeal stage reported in our study was captured in surface waters in July 2010.…”

Section: Occurrence and Abundance Of Larval Speciesmentioning

confidence: 67%

Larval stages of crustacean species of interest for conservation and fishing exploitation in the western Mediterranean

Torres¹,

Santos²,

Alemany³

et al. 2013

Sci. Mar.

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SUMMARY: Decapod crustaceans are the main target species of deep water bottom trawl fisheries in the western Mediterranean. Despite their importance for fisheries and conservation, little is known about their larval development, especially in the case of deep water species. In this paper we present new information on the occurrence and morphology of larval stages for some species of commercial interest based on samples collected off the Balearic Islands. Mesozooplankton sampling was carried out using depth-stratified sampling devices at two stations located on the continental shelf break and middle slope, in the northwest and south of Mallorca in late autumn 2009 and summer 2010. We describe in detail the second mysis stage of the red shrimp Aristeus antennatus, not previously known, and the first larval stage of the slipper lobster Scyllarides latus, poorly described almost a hundred years ago. We also report the second finding of larvae of the spider crab Maja squinado and the first capture from the field of larval stages of the rose shrimp Parapenaeus longirostris and slipper lobster in the Mediterranean.

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“…Although this has been explained according to the available food [97,98], it could also be interpreted as a compensation mechanism for the genetic damage observed in this work. It has been confirmed in laboratory studies that the number of surviving larvae decreases throughout their different stages, with a drastic reduction in survival from the moulting to megalopa stage [99][100][101]. An increase in the quantity of eggs could compensate for the decrease in offspring survival.…”

Section: Discussionmentioning

confidence: 87%

Influence of Storage Time on the DNA Integrity and Viability of Spermatozoa of the Spider Crab Maja brachydactyla

Rodríguez-Pena,

Suárez,

Estévez-Pérez

et al. 2023

Animals

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Natural populations of the spider crab Maja brachydactyla constitute a fishery resource of great economic importance in many countries. As in the rest of eubrachyurans, the females of this species have ventral-type seminal receptacles where they store sperm from copulations. Sperm can be stored in these structures for months and even years before egg fertilisation, with the consequent degradation of the sperm cells during the time. In this work, we analyse the viability and the possible genetic damage in sperm accumulated in the seminal receptacles of M. brachydactyla females as a function of the storage time (from 0 to 14 months) using the comet assay technique. On one hand, we developed an algorithm for comet image analysis that improves the comet segmentation compared with the free software Open comet v1.3.1 (97% vs. 76% of detection). In addition, our software allows the manual modification of the contours wrongly delimited via the automatic tool. On the other hand, our data show a sharp decline in sperm viability and DNA integrity in the first four months of storage, which could lead to a decrease in the fecundity rate and/or viability of the embryos or larvae from the second and third clutches of the annual cycle if the repair capacity in these gametic cells is low.

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First results of embryonic development, spawning and larval rearing of the Mediterranean spider crabMaja squinado(Herbst ) under laboratory conditions, a candidate species for a restocking program

Cited by 8 publications

References 32 publications

Assessing Fishing and Marine Biodiversity Changes Using Fishers' Perceptions: The Spanish Mediterranean and Gulf of Cadiz Case Study

Assessing Fishing and Marine Biodiversity Changes Using Fishers' Perceptions: The Spanish Mediterranean and Gulf of Cadiz Case Study

Larval stages of crustacean species of interest for conservation and fishing exploitation in the western Mediterranean

Influence of Storage Time on the DNA Integrity and Viability of Spermatozoa of the Spider Crab Maja brachydactyla

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