BIOTIC

BIOTIC Species Information for Pasiphaea spp.

Researched by

Sean Lindsley-Leake

Data supplied by

MarLIN

Refereed by

This information is not refereed

Reproduction/Life History

Reproductive type

Gonochoristic

Developmental mechanism

Lecithotrophic
Planktotrophic

Reproductive Season

See additional information

Reproductive Location

As adult

Reproductive frequency

See additional information

Regeneration potential

Life span

Insufficient information

Age at reproductive maturity

Insufficient information

Generation time

Insufficient information

Fecundity

12-49

Egg/propagule size

1.5mm

Fertilization type

Internal

Larvae/Juveniles
Larval/Juvenile dispersal potential	Insufficient information	Larval settlement period	Insufficient information
Duration of larval stage	11-30 days

Reproduction Preferences Additional Information

Reproductive season and frequency are both dependant on species, and geographical location of species:continuous in P.sivado in the Med, seasonal in the Irish Sea; sept-march in P.multidentata. Fecundity is also highly dependant on species, with geographical variation within species. The oogenetic pattern of P.sivado is typical of a caridean shrimp. There is a pool of previtellogenic oocytes at all times that develop from the periphery of the gonad towards the centre during maturation. Previtellogenic oocytes grow to approximately 200 µm before undergoing vitellogenesis. The vitellogenic oocytes are surrounded by a monolayer of accessory cells. The maximum size observed for a mature oocyte is 1420 µm. The oocyte-size distribution confirms the seasonal reproductive pattern of this species; in winter, the ovaries contained mainly previtellogenic oocytes, some of which start maturing in spring, resulting in a slightly bimodal distribution. In summer, the vitellogenic oocytes reach approximately 1000 µm and in late autumn the ovaries are fully mature and ready to spawn.large size of mature vitellogenic oocytes (~1400 µm) corresponds to the egg size (1870 µm in length) previously reported from ovigerous females (Company et al. 2001). This egg size is indicative of lecithotrophic larval development with a reduction in the number of larval stages . Abbreviated larval development provides a higher larval survival probability, and is typical of deep-sea caridean shrimps.

Reproduction References

Company et al., 2001, Williamson, 1960, Ramirez-Llodra et al., 2007,