Loligo: Difference between revisions
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{{Short description|Genus of squids}} |
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{{Automatic taxobox |
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| fossil_range = {{fossil range|Eocene|recent|[[Eocene]] - recent<ref name="Mironenko2021"/>}} |
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| image = Loligo vulgaris.jpg |
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| image_caption = Live specimen of ''L. vulgaris'' from the Belgian continental shelf, photographed on board the [[RV Belgica (A962)|RV ''Belgica'']]. (ML: 138 mm, MW: 39 mm) |
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| authority = [[Jean Baptiste Lamarck|Lamarck]], 1798<ref name = WoRMS>{{cite web | url =http://www.marinespecies.org/aphia.php?p=taxdetails&id=138139 | title = ''Loligo'' Lamarck, 1798 | accessdate = 12 February 2018 | publisher = Flanders Marine Institute | author = Julian Finn | year = 2016 | work = World Register of Marine Species}}</ref> |
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| type_species = ''[[Loligo vulgaris]]'' |
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| type_species_authority = Lamarck, 1798 |
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| synonyms = ''Pteroteuthis'' <small>[[Christian Gottfried Ehrenberg|Ehrenberg]], 1831</small> |
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| ⚫ | The genus was first described by [[Jean Baptiste Lamarck]] in 1798. However, the name had been used earlier than Lamarck ([[Johann Gottlob Theaenus Schneider|Schneider]], 1784; [[Carl Linnaeus|Linnaeus]], [[10th edition of Systema Naturae|1758]]) and might even have been used by [[Pliny the Elder|Pliny]]. In the early 19th century, this generic name was often used as a grouping for all true |
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| ⚫ | The genus was first described by [[Jean Baptiste Lamarck]] in 1798. However, the name had been used earlier than Lamarck ([[Johann Gottlob Theaenus Schneider|Schneider]], 1784; [[Carl Linnaeus|Linnaeus]], [[10th edition of Systema Naturae|1758]]) and might even have been used by [[Pliny the Elder|Pliny]]. In the early 19th century, this generic name was often used as a grouping for all true squid. |
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All three species of Loligo are extensively exploited by commercial fisheries. [[Loligo vulgaris]] and others are noted for being attracted to night light; they are therefore fished using different light-attraction methods. |
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All three species of ''Loligo'' are caught by commercial fisheries, most abundantly by traditional trawling methods (mobile gear). In the United States of America, Longfin squid are federally regulated under the Atlantic Mackerel, Squid, and Butterfish Management Plan. ''[[Loligo vulgaris]]'' and others are noted for being attracted to lights at night; they can therefore be fished using different light-attraction methods. Commercial fishing is heavily regulated in the United States, and fishing using mobile gear is only permitted during daylight hours. However, the recreational fisherman is often found sitting by a light at the pier, happily jigging for squid with a rod and reel. |
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''Loligo'' is the oldest true squid genus known from [[fossil]] remains; [[Statocyst|statoliths]] assigned to the extinct species ''[[Loligo applegatei]]'' are known from the early [[Eocene]]. In addition, a [[Permineralization|pyritized]] imprint of a ''Loligo'' squid is known from the [[Oligocene]] of [[Krasnodar|Krasnodar, Russia]], marking the first true squid known from a complete body fossil. The squid appears to have suffocated in [[Anoxic waters|anoxic]] bottom water while attempting to eat an extinct [[cutlassfish]] (''[[Anenchelum]]'').<ref name="Mironenko2021">{{Cite journal |last1=Mironenko |first1=Aleksandr A. |last2=Boiko |first2=Maxim S. |last3=Bannikov |first3=Alexandre F. |last4=Arkhipkin |first4=Alexander I. |last5=Bizikov |first5=Viacheslav A. |last6=Košťák |first6=Martin |date=10 August 2021 |title=First discovery of the soft-body imprint of an Oligocene fossil squid indicates its piscivorous diet |url=https://www.idunn.no/doi/10.1111/let.12440 |journal=Lethaia |language=en |volume=54 |issue=5 |pages=793–805 |doi=10.1111/let.12440 |issn=0024-1164}}</ref> |
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== Species == |
== Species == |
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The recent classification of Vecchione et al. (2005)[[Loligo#cite note-1|[1]]] and the [[Tree of Life Web Project]] (2010)[[Loligo#cite note-2|[2]]] recognises only three species within Loligo, many others having been split off in other [[Loliginidae|loliginid]] genera. |
The recent classification of Vecchione et al. (2005)[[Loligo#cite note-1|[1]]] and the [[Tree of Life Web Project]] (2010)[[Loligo#cite note-2|[2]]] recognises only three species within Loligo, many others having been split off in other [[Loliginidae|loliginid]] genera. |
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* [[Loligo forbesii]], veined squid |
* ''[[Loligo forbesii]]'', veined squid |
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* [[Loligo reynaudii]], Cape Hope squid or chokka |
* ''[[Loligo reynaudii]]'', Cape Hope squid or chokka |
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* [[Loligo vulgaris]], European squid |
* ''[[Loligo vulgaris]]'', European squid |
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== Synapomorphies == |
== Synapomorphies == |
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Unlike many genera that can be described by commonalities inherited exclusively from their common ancestor, the classification of a species as being in the genus Loligo is not based on positive discrimination. The only positive |
Unlike many genera that can be described by commonalities inherited exclusively from their common ancestor, the classification of a species as being in the genus ''Loligo'' is not based on positive discrimination. The only positive distinction is not based on any form of inheritance and has to do with its Eastern Atlantic distribution. Other than this, the grounds for grouping a squid in this taxon is exclusively based on its lacking of characteristics that would put it in another taxon. Thus all squid in ''Loligo'' have rhomboidal fins as adults, elongated mantles, fins whose length exceeds their breadth, and lack [[photophore]]s, but all other squid genera do as well. |
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== Mating == |
== Mating == |
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Mating in this genus is aseasonal. Such breeding is referred to as [[Continuous breeder|continuous breeding]]. Loligo squid gather near the surface of the water and males frenzy for females. Insertion of a sperm sac into the female is done with the tentacles of a male. |
Mating in this genus is aseasonal. Such breeding is referred to as [[Continuous breeder|continuous breeding]]. ''Loligo'' squid gather near the surface of the water and males frenzy for females. Insertion of a sperm sac into the female is done with the tentacles of a male. The female then lays the fertilized eggs in roughly twenty jelly-filled sacs, each containing 200-300 eggs. Hatching occurs after three to four weeks, and complete sexual maturation takes roughly three years. |
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== Educational |
== Educational uses == |
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Squid of the genus Loligo have widely been used in first year biology laboratories. Aside from being highly affordable, preserved and readily available for purchase online, the relative size of a specimen in this genus is perfect for laboratory use. Averaging at roughly 8 |
Squid of the genus ''Loligo'' have widely been used in first year biology laboratories. Aside from being highly affordable, preserved and readily available for purchase online, the relative size of a specimen in this genus is perfect for laboratory use. Averaging at roughly 20 to 50 cm (8 to 20 inches) in length, the squid is small enough to fit on a typical [[Dissection|dissection tray]] while large enough to have very visible structures for easy identifiability. |
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== Human |
== Human consumption == |
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Squid of genus Loligo are widely consumed by humans. |
Squid of genus ''Loligo'' are widely consumed by humans. In the United States, commercial fishing for squid is federally regulated and yearly quotas are set by NOAA. Even with all the squid caught and consumed by humans, it does not threaten the genus because of its members’ prolific breeding habits. ''Loligo'' squid are available for fishing all year round, within the limits of the federally set quotas, and this greatly increases their desirability for [[Commercial fishing|industrial fisheries]]. This squid, when cooked, is what is commonly called [[Squid as food|calamari]]. |
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== References == |
== References == |
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{{Reflist}} |
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# ↑ Vecchione, M., E. Shea, S. Bussarawit, F. Anderson, D. Alexeyev, C.-C. Lu, T. Okutani, M. Roeleveld, C. Chotiyaputta, C. Roper, E. Jorgensen & N. Sukramongkol. (2005). "Systematics of Indo-West Pacific loliginids." (PDF). |
# ↑ Vecchione, M., E. Shea, S. Bussarawit, F. Anderson, D. Alexeyev, C.-C. Lu, T. Okutani, M. Roeleveld, C. Chotiyaputta, C. Roper, E. Jorgensen & N. Sukramongkol. (2005). "Systematics of Indo-West Pacific loliginids." (PDF). Phuket Marine Biological Center Research Bulletin 66: 23–26. |
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# ↑ Vecchione, M. & R.E. Young. (2010). Loliginidae Lesueur, 1821. The Tree of Life Web Project. |
# ↑ Vecchione, M. & R.E. Young. (2010). Loliginidae Lesueur, 1821. The Tree of Life Web Project. |
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== External links == |
== External links == |
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|Wikispecies has information related to: [[Special:Search/Loligo|Loligo]] |
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* Current Classification of Recent Cephalopoda |
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* Natural History of the Squid |
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|[[Wikidata:WikiProject Taxonomy|Taxon identifiers]] |
|[[Wikidata:WikiProject Taxonomy|Taxon identifiers]] |
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* WoRMS: 138139 |
* WoRMS: 138139 |
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{{Taxonbar|from=Q2706095}} |
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|This squid-related article is a stub. You can help Wikipedia by expanding it. |
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[[Category:Taxa named by Jean-Baptiste Lamarck]] |
[[Category:Taxa named by Jean-Baptiste Lamarck]] |
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[[Category:Cephalopod genera]] |
[[Category:Cephalopod genera]] |
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Latest revision as of 06:01, 22 August 2024
| Loligo Temporal range:
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| Live specimen of L. vulgaris from the Belgian continental shelf, photographed on board the RV Belgica. (ML: 138 mm, MW: 39 mm) | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Order: | Myopsida |
| Family: | Loliginidae |
| Genus: | Loligo Lamarck, 1798[2] |
| Type species | |
| Loligo vulgaris Lamarck, 1798
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| Synonyms | |
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Pteroteuthis Ehrenberg, 1831 | |
Loligo is a genus of squid and one of the most representative and widely distributed groups of myopsid squid.
The genus was first described by Jean Baptiste Lamarck in 1798. However, the name had been used earlier than Lamarck (Schneider, 1784; Linnaeus, 1758) and might even have been used by Pliny. In the early 19th century, this generic name was often used as a grouping for all true squid.
All three species of Loligo are caught by commercial fisheries, most abundantly by traditional trawling methods (mobile gear). In the United States of America, Longfin squid are federally regulated under the Atlantic Mackerel, Squid, and Butterfish Management Plan. Loligo vulgaris and others are noted for being attracted to lights at night; they can therefore be fished using different light-attraction methods. Commercial fishing is heavily regulated in the United States, and fishing using mobile gear is only permitted during daylight hours. However, the recreational fisherman is often found sitting by a light at the pier, happily jigging for squid with a rod and reel.
Loligo is the oldest true squid genus known from fossil remains; statoliths assigned to the extinct species Loligo applegatei are known from the early Eocene. In addition, a pyritized imprint of a Loligo squid is known from the Oligocene of Krasnodar, Russia, marking the first true squid known from a complete body fossil. The squid appears to have suffocated in anoxic bottom water while attempting to eat an extinct cutlassfish (Anenchelum).[1]
Species
[edit]The recent classification of Vecchione et al. (2005)[1] and the Tree of Life Web Project (2010)[2] recognises only three species within Loligo, many others having been split off in other loliginid genera.
- Loligo forbesii, veined squid
- Loligo reynaudii, Cape Hope squid or chokka
- Loligo vulgaris, European squid
Synapomorphies
[edit]Unlike many genera that can be described by commonalities inherited exclusively from their common ancestor, the classification of a species as being in the genus Loligo is not based on positive discrimination. The only positive distinction is not based on any form of inheritance and has to do with its Eastern Atlantic distribution. Other than this, the grounds for grouping a squid in this taxon is exclusively based on its lacking of characteristics that would put it in another taxon. Thus all squid in Loligo have rhomboidal fins as adults, elongated mantles, fins whose length exceeds their breadth, and lack photophores, but all other squid genera do as well.
Mating
[edit]Mating in this genus is aseasonal. Such breeding is referred to as continuous breeding. Loligo squid gather near the surface of the water and males frenzy for females. Insertion of a sperm sac into the female is done with the tentacles of a male. The female then lays the fertilized eggs in roughly twenty jelly-filled sacs, each containing 200-300 eggs. Hatching occurs after three to four weeks, and complete sexual maturation takes roughly three years.
Educational uses
[edit]Squid of the genus Loligo have widely been used in first year biology laboratories. Aside from being highly affordable, preserved and readily available for purchase online, the relative size of a specimen in this genus is perfect for laboratory use. Averaging at roughly 20 to 50 cm (8 to 20 inches) in length, the squid is small enough to fit on a typical dissection tray while large enough to have very visible structures for easy identifiability.
Human consumption
[edit]Squid of genus Loligo are widely consumed by humans. In the United States, commercial fishing for squid is federally regulated and yearly quotas are set by NOAA. Even with all the squid caught and consumed by humans, it does not threaten the genus because of its members’ prolific breeding habits. Loligo squid are available for fishing all year round, within the limits of the federally set quotas, and this greatly increases their desirability for industrial fisheries. This squid, when cooked, is what is commonly called calamari.
References
[edit]- ^ a b Mironenko, Aleksandr A.; Boiko, Maxim S.; Bannikov, Alexandre F.; Arkhipkin, Alexander I.; Bizikov, Viacheslav A.; Košťák, Martin (10 August 2021). "First discovery of the soft-body imprint of an Oligocene fossil squid indicates its piscivorous diet". Lethaia. 54 (5): 793–805. doi:10.1111/let.12440. ISSN 0024-1164.
- ^ Julian Finn (2016). "Loligo Lamarck, 1798". World Register of Marine Species. Flanders Marine Institute. Retrieved 12 February 2018.
- ↑ Vecchione, M., E. Shea, S. Bussarawit, F. Anderson, D. Alexeyev, C.-C. Lu, T. Okutani, M. Roeleveld, C. Chotiyaputta, C. Roper, E. Jorgensen & N. Sukramongkol. (2005). "Systematics of Indo-West Pacific loliginids." (PDF). Phuket Marine Biological Center Research Bulletin 66: 23–26.
- ↑ Vecchione, M. & R.E. Young. (2010). Loliginidae Lesueur, 1821. The Tree of Life Web Project.
External links
[edit]- http://eol.org/pages/38585/overview
- http://ladywildlife.com/animals/loligosquid.html
- https://aqua.org/~/media/Files/Learn/Education%20Baltimore%20PDFs/Teacher%20Booklets/squid-lab-6-12.pdf
- https://www.northernproducts.com/wp-content/uploads/2013/02/Loligo-Squid.pdf
- http://www.tandfonline.com/doi/pdf/10.1080/23308249.2015.1026226
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