Gonodactylus smithii

Gonodactylus smithii
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Malacostraca
Order: Stomatopoda
Family: Gonodactylidae
Genus: Gonodactylus
Species:
G. smithii
Binomial name
Gonodactylus smithii
Pocock, 1893 [1]

Gonodactylus smithii, also known as the purple spot mantis shrimp or Smith's mantis shrimp, is a species of the smasher type of mantis shrimp.[2] G. smithii are the first animals discovered to be capable of dynamic polarization vision.[3] They are identified by their distinctive meral spots ranging from maroon to purple with a white ring, though those that inhabit depths below 10 meters tend to be colored maroon.[4] They also have raptorial dactyles, specialized forelimbs that are pigmented green and red, and antennal scales that are yellow.[4]

Background

Gonodactylus smithii are aggressive benthic marine predators that exhibit highly specialized color vision.[5] On average, they are around 60 millimeters in length, but have been found to be as large as 380 millimeters.[5][4] The morphology of both males and females are isometrically proportional to their respective body masses.[6] Their mass ranges between 10 and 300 grams, with the average being around 60 grams.[4] Their basal metabolic rate ranges from 0.0125 to 0.02 cm3.02/g/hr, with the average being around 0.0175 cm3.02/g/hr.[4]

Distribution

Gonodactylus smithii are found in tropical littoral zones in the Indo-Pacific Ocean, and widespread in Australia, India, and eastern Africa.[2][5] They are also found in regions south of Japan and around Guam.[4] Gonodactylus smithii reside in coral reef flats in both shallow waters and low intertidal depths ranging from 1 to 60 meters, but are most commonly found in the low intertidal zone.[2] Gonodactylus smithii typically dwell in the cavities they create in either live coral or coral rubble.[4]

Reproduction

Gonodactylus smithii reproduce all year long, but breeding is more concentrated during warmer months.[4] They are generally monogamous, though some are polygynous.[4] Males usually pursue females in their native habitats.[5] Initially, males, using an external copulation organ, insert gonadopods into female gonadopores.[4] Sperm is released, with females holding the males briefly.[4] Females then release both the males and their eggs, with fertilization occurring.[4] Males typically leave after copulation and do not invest in the females nor their offspring.[4] Females are oviparous, laying eggs that eventually hatch.[4]

Life stages

Gonodactylus smithii have a bipartite life cycle.[7] They begin with a larval phase, during which dispersal occurs, then mature into an adult phase.[7] There are 7 larval stages, with the first 3 stages taking between 1 and 3 days, the fourth stage taking between 6 and 8 days, and the final 3 stages taking up to 38 days.[8]

Diet

Gonodactylus smithii utilize their smashing raptorial claws as a mechanism to catch prey.[4] The claws can easily shatter shells, stunning the prey.[4] Gonodactylus smithii are generally carnivorous, specifically preying on fish, molluscs, non-insect arthropods, crustaceans, bivalves, and gastropods.[4]

Movement

Gonodactylus smithii are capable of many signaling behaviors and exhibit offensive and defensive actions while doing so.[5] Offensive actions include pushing the telson into the domicile of the resident, grasping the body of another using maxillipeds, and using dactyls to pierce through another.[5] Defensive actions include simply avoiding, and bending the abdomen so that it brings the telson underneath and up to the front.[5]

Behavior

A behavior unique to Gonodactylus smithii is that they are capable of dynamic polarization vision.[3] Unlike other organisms, stomatopods only fixate their gaze on objects of interest from time to time.[3] They are able to focus their eyes with a series of rotations, and their eyes are capable of moving independently of the other.[3] One type of rotation they use is torsional rotation, in which their ability to see the polarization of light is amplified.[3] They rotate their eyes so that certain photoreceptors are aligned with the angle of polarization of a linearly polarized visual stimulus.[3] This allows them to isolate the contrast between the object of interest and its background.[3] The study of the eye structure of Gonodactylus smithii can generate more information on digital and visual storage capacity.[4]

Roles in ecosystem

Gonodactylus smithii are essential to their ecosystem as they provide habitats for other organisms.[4] The cavities that they create are left behind for other organisms to dwell in, and some host parasites, though this has led to the contracting of diseases in their shells.[4]

Bibliography

  • Barber, Paul, and Boyce, Sarah L. (2006). Estimating diversity of Indo-Pacific coral reef stomatopods through DNA barcoding of stomatopod larvae. Proc. R. Soc. B.[7]
  • Cheroske, Cronin, T. W., Durham, M. F., & Caldwell, R. L. (2009). Adaptive signaling behavior in stomatopods under varying light conditions. Marine and Freshwater Behaviour and Physiology.[5]
  • Daly, I., How, M., Partridge, J. et al. (2016). Dynamic polarization vision in mantis shrimps. Nat Commun.[3]
  • Luff, J. 2019. "Gonodactylus smithii" (On-line), Animal Diversity Web.[4]
  • McHenry, Claverie, T., Rosario, M. V., & Patek, S. N. (2012). Gearing for speed slows the predatory strike of a mantis shrimp. Journal of Experimental Biology.[6]
  • Morgan, Steven G., and Goy, Joseph W. (1987). Reproduction and Larval Development of the Mantis Shrimp Gonodactylus Bredini (Crustacea: Stomatopoda) Journal of Crustacean Biology.[8]
  • Yang, Mingqui, Liu, Hongtao, Wang, Rong, & Tan, Wei (2021). The complete mitochondrial genome of Purple Spot Mantis Shrimp Gonodactylus smithii (Pocock, 1893), Mitochondrial DNA Part B.[2]

References

  1. ^ "Species Gonodactylus smithii Pocock, 1893". Australian Faunal Directory. Department of the Environment, Water, Heritage and the Arts. January 30, 2009. Retrieved April 15, 2010.
  2. ^ a b c d Yang, Mingqiu; Liu, Hongtao; Wang, Rong; Tan, Wei (2021-07-03). "The complete mitochondrial genome of Purple Spot Mantis Shrimp Gonodactylus smithii (Pocock, 1893)". Mitochondrial DNA Part B. 6 (7): 2028–2030. doi:10.1080/23802359.2021.1942272. ISSN 2380-2359. PMC 8218846. PMID 34212086.
  3. ^ a b c d e f g h Daly, Ilse M.; How, Martin J.; Partridge, Julian C.; Temple, Shelby E.; Marshall, N. Justin; Cronin, Thomas W.; Roberts, Nicholas W. (November 2016). "Dynamic polarization vision in mantis shrimps". Nature Communications. 7 (1): 12140. doi:10.1038/ncomms12140. ISSN 2041-1723. PMC 4945877. PMID 27401817.
  4. ^ a b c d e f g h i j k l m n o p q r s t u Luff, Josh (2019). "Gonodactylus smithii". Animal Diversity Web.
  5. ^ a b c d e f g h Cheroske, Alexander G.; Cronin, Thomas W.; Durham, Mary F.; Caldwell, Roy L. (July 2009). "Adaptive signaling behavior in stomatopods under varying light conditions". Marine and Freshwater Behaviour and Physiology. 42 (4): 219–232. doi:10.1080/10236240903169222. hdl:11603/13458. ISSN 1023-6244. S2CID 43326818.
  6. ^ a b McHenry, Matthew J.; Claverie, Thomas; Rosario, Michael V.; Patek, S. N. (2012-04-01). "Gearing for speed slows the predatory strike of a mantis shrimp". Journal of Experimental Biology. 215 (7): 1231–1245. doi:10.1242/jeb.061465. ISSN 1477-9145. PMID 22399669. S2CID 25302134.
  7. ^ a b c Barber, Paul; Boyce, Sarah L (2006-08-22). "Estimating diversity of Indo-Pacific coral reef stomatopods through DNA barcoding of stomatopod larvae". Proceedings of the Royal Society B: Biological Sciences. 273 (1597): 2053–2061. doi:10.1098/rspb.2006.3540. ISSN 0962-8452. PMC 1635474. PMID 16846913.
  8. ^ a b Morgan, Steven G. (1987-01-01). "Reproduction and Larval Development of the Mantis Shrimp Gonodactylus Bredini (Crustacea: Stomatopoda) Maintained in the Laboratory". Journal of Crustacean Biology. 7 (4): 595–618. doi:10.1163/193724087X00379. ISSN 0278-0372. S2CID 198256273.