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== Description == |
== Description == |
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''Libinia spinosa'' is a member of the [[crab]] superfamily [[Majoidea]] which are commonly known as the spider crabs.<ref>{{Cite web|title=ADW: Majoidea: CLASSIFICATION|url=https://animaldiversity.org/accounts/Majoidea/classification/#Majoidea|access-date=2021-03-06|website=animaldiversity.org}}</ref> The [[carapace]]s of this organism can measure up to 89 mm and its leg span can be up to 568 mm.<ref name=":0">{{Cite journal| |
''Libinia spinosa'' is a member of the [[crab]] superfamily [[Majoidea]] which are commonly known as the spider crabs.<ref>{{Cite web|title=ADW: Majoidea: CLASSIFICATION|url=https://animaldiversity.org/accounts/Majoidea/classification/#Majoidea|access-date=2021-03-06|website=animaldiversity.org}}</ref> The [[carapace]]s of this organism can measure up to 89 mm and its leg span can be up to 568 mm.<ref name=":0">{{Cite journal|last1=Tavares|first1=Marcos|last2=Santana|first2=William|date=December 2012|title=On the morphological differentiation between Libinia spinosa and L. ferreirae (Crustacea: Brachyura: Majoidea: Epialtidae)|journal=Zoologia (Curitiba)|volume=29|issue=6|pages=577–588|doi=10.1590/s1984-46702012000600009|issn=1984-4689|doi-access=free}}</ref> The number of median spines of ''Libinia spinosa'' can vary, with 7 being the most common number, but ''Libinia spinosa'' with 5, 8, and 10 median spines are also seen commonly.<ref name=":0" /> Testes are visibly flat, transparent structures that are coiled anteriorly.<ref>{{Cite journal|last1=Moyano|first1=M. P. Sal|last2=Gavio|first2=M. A.|last3=Cuartas|first3=E. I.|date=September 2010|title=Morphology and function of the reproductive tract of the spider crab Libinia spinosa (Crustacea, Brachyura, Majoidea): pattern of sperm storage|journal=Helgoland Marine Research|language=en|volume=64|issue=3|pages=213–221|doi=10.1007/s10152-009-0180-9|issn=1438-3888|doi-access=free}}</ref> |
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== Range and habitat == |
== Range and habitat == |
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== Reproduction == |
== Reproduction == |
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''Libinia spinosa'' engage in precopulatory courting using both olfactory and tactile cues, indirect sperm transfer is common.<ref name=":2">{{Cite web|title=Libinia spinosa|url=https://www.sealifebase.ca/summary/Libinia-spinosa.html|access-date=2021-02-14|website=www.sealifebase.ca}}</ref> Females have been shown to exhibit sexual selection with their preference for larger males.<ref name=":4">{{Cite journal| |
''Libinia spinosa'' engage in precopulatory courting using both olfactory and tactile cues, indirect sperm transfer is common.<ref name=":2">{{Cite web|title=Libinia spinosa|url=https://www.sealifebase.ca/summary/Libinia-spinosa.html|access-date=2021-02-14|website=www.sealifebase.ca}}</ref> Females have been shown to exhibit sexual selection with their preference for larger males.<ref name=":4">{{Cite journal|last1=González Pisani|first1=Ximena|last2=López Greco|first2=Laura S.|date=2020-12-01|title=Male reproductive strategies in two species of spider crabs, Leurocyclus tuberculosus and Libinia spinosa|url=https://www.sciencedirect.com/science/article/pii/S0944200620301069|journal=Zoology|language=en|volume=143|pages=125847|doi=10.1016/j.zool.2020.125847|s2cid=224926555 |issn=0944-2006}}</ref> The trait that has been shown to be most highly correlated with mate acquisition for males is large [[Chela (organ)|cheliped]] size.<ref>{{Cite journal|last1=Sal Moyano|first1=María Paz|last2=Gavio|first2=María Andrea|date=2012-02-01|title=Comparison of Mating Behavior and Copulation in Male Morphotypes of the Spider Crab Libinia Spinosa (Brachyura: Majoidea: Epialtidae)|journal=Journal of Crustacean Biology|volume=32|issue=1|pages=31–38|doi=10.1163/193724011X615307|issn=0278-0372|doi-access=free}}</ref> Males have been shown to exhibit mate guarding where they will maneuver their [[Chela (organ)|chelipeds]] around the female and fight off other males.<ref name=":4" /> Precopulatory mate guarding is exhibited significantly longer than postcopulatory mate guarding.<ref name=":4" /> Males breed with females by turning the female upside down and below them and subsequently inserting their [[gonopod]]s into the female's [[Gonopore|gonophores]]. Male copulatory organs consist of a long first [[gonopod]] and a short stout second [[gonopod]].<ref name=":4" /> Females produce 1-3 offspring for each breeding season.<ref name=":4" /> |
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== Life cycle == |
== Life cycle == |
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=== Prezoeal phase === |
=== Prezoeal phase === |
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''Libinia Spinosa's'' total length in this phase is 0.8 mm and the [[larva]] is encased in a [[cuticle]]. Its rostrum and dorsal spine are folded. The maxillipeds have terminal, retracted [[seta]]e. This stage lasts 3 to 5 minutes.<ref name=":3">{{Cite journal| |
''Libinia Spinosa's'' total length in this phase is 0.8 mm and the [[larva]] is encased in a [[cuticle]]. Its rostrum and dorsal spine are folded. The maxillipeds have terminal, retracted [[seta]]e. This stage lasts 3 to 5 minutes.<ref name=":3">{{Cite journal|last1=Sandifer|first1=Paul A.|last2=van Engel|first2=Willard A.|date=March 1971|title=Larval Development of the Spider Crab, Libinia dubia H. Milne Edwards (Brachyura, Majidae, Pisinae), Reared in Laboratory Culture|url=http://dx.doi.org/10.2307/1350498|journal=Chesapeake Science|volume=12|issue=1|pages=18|doi=10.2307/1350498|jstor=1350498 |issn=0009-3262}}</ref> |
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=== Zoeal phase === |
=== Zoeal phase === |
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== Ecology == |
== Ecology == |
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''Libinia spinosa'' can be classified as a generalist species when it comes to diet.<ref name=":1" /> It consumes both mobile and nonmobile prey.<ref>{{Cite journal| |
''Libinia spinosa'' can be classified as a generalist species when it comes to diet.<ref name=":1" /> It consumes both mobile and nonmobile prey.<ref>{{Cite journal|last1=Barros|first1=Samara de Paiva|last2=Cobo|first2=Valter José|last3=Fransozo|first3=Adilson|date=April 2008|title=Feeding habits of the spider crab Libinia spinosa H. Milne Edwards, 1834 (Decapoda, Brachyura) in Ubatuba bay, São Paulo, Brazil|journal=Brazilian Archives of Biology and Technology|volume=51|issue=2|pages=413–417|doi=10.1590/s1516-89132008000200023|issn=1516-8913|doi-access=free}}</ref> It feeds on organisms such as [[algae]], [[Sponge|poriferans]], [[cnidaria]]ns, [[Mollusca|mollusks]], [[polychaete]]s, [[crustacean]]s, and small [[fish]].<ref name=":1" />''Libinia spinos''a does not have commercial value but is unintentionally caught in [[prawn]] trawls, an activity which has led to a decline in its population.<ref name=":5">{{Cite journal|last1=Gonçalves|first1=Geslaine Rafaela Lemos|last2=Palomares|first2=Luana Ferraz da Silveira|last3=Sousa|first3=Aline Nonato|last4=Stanski|first4=Gilson|last5=Sancinetti|first5=Gustavo|last6=Costa|first6=Rogerio Caetano da|last7=Castilho|first7=Antonio Leão|date=2020|title=Geographical ecology of the symbiotic crabs Libinia ferreirae and Libinia spinosa: Distributional patterns in south and south-eastern coast of Brazil|url=https://onlinelibrary.wiley.com/doi/abs/10.1111/maec.12606|journal=Marine Ecology|language=en|volume=41|issue=4|pages=e12606|doi=10.1111/maec.12606|s2cid=225519407 |issn=1439-0485}}</ref> ''Libinia spinosa'' carries [[epibiont]]s such as [[sea anemone]]s on top of its [[carapace]]s.<ref name=":5" /> |
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=== Symbiotic relationship with ''Lychnorhiza lucerna'' === |
=== Symbiotic relationship with ''Lychnorhiza lucerna'' === |
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''Libinia spinosa'' has been shown to engage in a [[Symbiosis|symbiotic]] relationship with the medusa ''[[Lychnorhiza lucerna]]'', mainly during its juvenile stages.<ref name=":6">{{Cite journal|last=Zamponi|first=M. O.|date=2002-07-01|title=The Association between Medusa Lychnorhiza lucerna (Scyphomedusae, Rhizostomeae) and Decapod Libinia spinosa (Brachyura, Majidae) Recorded for the First Time in Neritic Waters of Argentina|url=https://doi.org/10.1023/A:1020229328660|journal=Russian Journal of Marine Biology|language=en|volume=28|issue=4|pages=267–269|doi=10.1023/A:1020229328660|issn=1608-3377}}</ref><ref name=":7">{{Cite journal| |
''Libinia spinosa'' has been shown to engage in a [[Symbiosis|symbiotic]] relationship with the medusa ''[[Lychnorhiza lucerna]]'', mainly during its juvenile stages.<ref name=":6">{{Cite journal|last=Zamponi|first=M. O.|date=2002-07-01|title=The Association between Medusa Lychnorhiza lucerna (Scyphomedusae, Rhizostomeae) and Decapod Libinia spinosa (Brachyura, Majidae) Recorded for the First Time in Neritic Waters of Argentina|url=https://doi.org/10.1023/A:1020229328660|journal=Russian Journal of Marine Biology|language=en|volume=28|issue=4|pages=267–269|doi=10.1023/A:1020229328660|s2cid=37201767 |issn=1608-3377}}</ref><ref name=":7">{{Cite journal|last1=Sal Moyano|first1=M. P.|last2=Schiariti|first2=A.|last3=Giberto|first3=D. A.|last4=Diaz Briz|first4=L.|last5=Gavio|first5=M. A.|last6=Mianzan|first6=H. W.|date=2012-09-01|title=The symbiotic relationship between Lychnorhiza lucerna (Scyphozoa, Rhizostomeae) and Libinia spinosa (Decapoda, Epialtidae) in the Río de la Plata (Argentina–Uruguay)|url=https://doi.org/10.1007/s00227-012-1980-z|journal=Marine Biology|language=en|volume=159|issue=9|pages=1933–1941|doi=10.1007/s00227-012-1980-z|s2cid=253740831 |issn=1432-1793}}</ref><ref name=":5" /> ''Libinia spinosa'' burrows itself in the subgenital pockets of ''[[Lychnorhiza lucerna]]''.<ref name=":6" />''Libinia spinosa'' is protected from predators by the stinging [[cnidocyte]]s of ''[[Lychnorhiza lucerna]]'' and also ingests food particles collected by ''[[Lychnorhiza lucerna]]''.<ref name=":6" /> Additionally, this relationship allows ''Libinia spinosa'' to move through the environment while conserving its own energy.<ref name=":5" /> There is no clear benefit to ''[[Lychnorhiza lucerna]]'' hosting ''Libinia spinosa'' so their [[Symbiosis|symbiotic]] relationship is likely a form of [[commensalism]].<ref name=":7" /><ref name=":6" /> |
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== References == |
== References == |
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Revision as of 17:21, 3 January 2023
| Libinia spinosa | |
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Malacostraca |
| Order: | Decapoda |
| Suborder: | Pleocyemata |
| Infraorder: | Brachyura |
| Family: | Epialtidae |
| Genus: | Libinia |
| Species: | L. spinosa
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| Binomial name | |
| Libinia spinosa Milne Edwards, 1834
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Libinia spinosa is a majoid crab found in mud and sand bottoms of the Southwestern Atlantic and Pacific oceans. It is a generalist feeder on organisms such as algae, sponges, cnidarians, mollusks, polychaetes, crustaceans, and small fish. It commonly engages in a symbiotic relationship with the medusa Lychnorhiza lucerna.
Description
Libinia spinosa is a member of the crab superfamily Majoidea which are commonly known as the spider crabs.[1] The carapaces of this organism can measure up to 89 mm and its leg span can be up to 568 mm.[2] The number of median spines of Libinia spinosa can vary, with 7 being the most common number, but Libinia spinosa with 5, 8, and 10 median spines are also seen commonly.[2] Testes are visibly flat, transparent structures that are coiled anteriorly.[3]
Range and habitat
Libinia spinosa is commonly found at both mud and sand bottoms in the Southwestern Atlantic and Pacific oceans.[2][4] It inhabits Southwestern Atlantic waters ranging from Nova Scotia to Argentina.[2][4] In the Pacific Ocean, it is found off the coasts of the United States, Baja California, Galápagos Islands, Hawaii, Peru, and Chile.[4] The depths at which this organism is found at range from the intertidal zone to 170 m. It prefers sediment that contains both silt and clay.[5]
Reproduction
Libinia spinosa engage in precopulatory courting using both olfactory and tactile cues, indirect sperm transfer is common.[6] Females have been shown to exhibit sexual selection with their preference for larger males.[4] The trait that has been shown to be most highly correlated with mate acquisition for males is large cheliped size.[7] Males have been shown to exhibit mate guarding where they will maneuver their chelipeds around the female and fight off other males.[4] Precopulatory mate guarding is exhibited significantly longer than postcopulatory mate guarding.[4] Males breed with females by turning the female upside down and below them and subsequently inserting their gonopods into the female's gonophores. Male copulatory organs consist of a long first gonopod and a short stout second gonopod.[4] Females produce 1-3 offspring for each breeding season.[4]
Life cycle
Prezoeal phase
Libinia Spinosa's total length in this phase is 0.8 mm and the larva is encased in a cuticle. Its rostrum and dorsal spine are folded. The maxillipeds have terminal, retracted setae. This stage lasts 3 to 5 minutes.[8]
Zoeal phase
Libinia spinosa has 2 stages in the zoeal phase of its larval cycle. In the zoeal phase, Libinia spinosa contains a carapace with one rostral and one dorsal spine, seven setae are present. The abdominal somite 2 of the zoeal phase has 2 dorsolateral projections while the abdominal somite 3 lacks dorsolateral projections. The abdominal somites 3 and 4 of the zoeal phase have postero-lateral processes. There are 10 marginal setae and 1 apical setae on the scaphognathite.[9]
Megalopa phase
The megalopal phase of Libinia spinosa contains 1 stage.[9] The rostrum in this phase is deflected ventrally and carapaces contains spines/tuberance.[9] There are 2 maxillule endopod setae, 0 maxilla endopod setae, 4 first maxilliped epipod setae, and 6 third maxilliped setae.[9]
Ecology
Libinia spinosa can be classified as a generalist species when it comes to diet.[9] It consumes both mobile and nonmobile prey.[10] It feeds on organisms such as algae, poriferans, cnidarians, mollusks, polychaetes, crustaceans, and small fish.[9]Libinia spinosa does not have commercial value but is unintentionally caught in prawn trawls, an activity which has led to a decline in its population.[5] Libinia spinosa carries epibionts such as sea anemones on top of its carapaces.[5]
Symbiotic relationship with Lychnorhiza lucerna
Libinia spinosa has been shown to engage in a symbiotic relationship with the medusa Lychnorhiza lucerna, mainly during its juvenile stages.[11][12][5] Libinia spinosa burrows itself in the subgenital pockets of Lychnorhiza lucerna.[11]Libinia spinosa is protected from predators by the stinging cnidocytes of Lychnorhiza lucerna and also ingests food particles collected by Lychnorhiza lucerna.[11] Additionally, this relationship allows Libinia spinosa to move through the environment while conserving its own energy.[5] There is no clear benefit to Lychnorhiza lucerna hosting Libinia spinosa so their symbiotic relationship is likely a form of commensalism.[12][11]
References
- ^ "ADW: Majoidea: CLASSIFICATION". animaldiversity.org. Retrieved 2021-03-06.
- ^ a b c d Tavares, Marcos; Santana, William (December 2012). "On the morphological differentiation between Libinia spinosa and L. ferreirae (Crustacea: Brachyura: Majoidea: Epialtidae)". Zoologia (Curitiba). 29 (6): 577–588. doi:10.1590/s1984-46702012000600009. ISSN 1984-4689.
- ^ Moyano, M. P. Sal; Gavio, M. A.; Cuartas, E. I. (September 2010). "Morphology and function of the reproductive tract of the spider crab Libinia spinosa (Crustacea, Brachyura, Majoidea): pattern of sperm storage". Helgoland Marine Research. 64 (3): 213–221. doi:10.1007/s10152-009-0180-9. ISSN 1438-3888.
- ^ a b c d e f g h González Pisani, Ximena; López Greco, Laura S. (2020-12-01). "Male reproductive strategies in two species of spider crabs, Leurocyclus tuberculosus and Libinia spinosa". Zoology. 143: 125847. doi:10.1016/j.zool.2020.125847. ISSN 0944-2006. S2CID 224926555.
- ^ a b c d e Gonçalves, Geslaine Rafaela Lemos; Palomares, Luana Ferraz da Silveira; Sousa, Aline Nonato; Stanski, Gilson; Sancinetti, Gustavo; Costa, Rogerio Caetano da; Castilho, Antonio Leão (2020). "Geographical ecology of the symbiotic crabs Libinia ferreirae and Libinia spinosa: Distributional patterns in south and south-eastern coast of Brazil". Marine Ecology. 41 (4): e12606. doi:10.1111/maec.12606. ISSN 1439-0485. S2CID 225519407.
- ^ "Libinia spinosa". www.sealifebase.ca. Retrieved 2021-02-14.
- ^ Sal Moyano, María Paz; Gavio, María Andrea (2012-02-01). "Comparison of Mating Behavior and Copulation in Male Morphotypes of the Spider Crab Libinia Spinosa (Brachyura: Majoidea: Epialtidae)". Journal of Crustacean Biology. 32 (1): 31–38. doi:10.1163/193724011X615307. ISSN 0278-0372.
- ^ Sandifer, Paul A.; van Engel, Willard A. (March 1971). "Larval Development of the Spider Crab, Libinia dubia H. Milne Edwards (Brachyura, Majidae, Pisinae), Reared in Laboratory Culture". Chesapeake Science. 12 (1): 18. doi:10.2307/1350498. ISSN 0009-3262. JSTOR 1350498.
- ^ a b c d e f "Marine Species Identification Portal : Libinia spinosa". species-identification.org. Retrieved 2021-03-06.
- ^ Barros, Samara de Paiva; Cobo, Valter José; Fransozo, Adilson (April 2008). "Feeding habits of the spider crab Libinia spinosa H. Milne Edwards, 1834 (Decapoda, Brachyura) in Ubatuba bay, São Paulo, Brazil". Brazilian Archives of Biology and Technology. 51 (2): 413–417. doi:10.1590/s1516-89132008000200023. ISSN 1516-8913.
- ^ a b c d Zamponi, M. O. (2002-07-01). "The Association between Medusa Lychnorhiza lucerna (Scyphomedusae, Rhizostomeae) and Decapod Libinia spinosa (Brachyura, Majidae) Recorded for the First Time in Neritic Waters of Argentina". Russian Journal of Marine Biology. 28 (4): 267–269. doi:10.1023/A:1020229328660. ISSN 1608-3377. S2CID 37201767.
- ^ a b Sal Moyano, M. P.; Schiariti, A.; Giberto, D. A.; Diaz Briz, L.; Gavio, M. A.; Mianzan, H. W. (2012-09-01). "The symbiotic relationship between Lychnorhiza lucerna (Scyphozoa, Rhizostomeae) and Libinia spinosa (Decapoda, Epialtidae) in the Río de la Plata (Argentina–Uruguay)". Marine Biology. 159 (9): 1933–1941. doi:10.1007/s00227-012-1980-z. ISSN 1432-1793. S2CID 253740831.
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