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One of the unusual reproductive features in cephalopods is the flexibility of sperm deposition sites in females. Recently we reported that female Enoploteuthis chunii possess not only a major sperm receptacle (MSR) but also a cryptic sperm pocket (CSP) and CSP utilization increases towards the end of the reproductive season. This may occur due to male-male competition over insemination sites, as a male-biased sex ratio and CSP utilization are tightly correlated. The microsatellite-based...
MicroPubl Biol. 2025 Jul 2;2025. doi: 10.17912/micropub.biology.001538. eCollection 2025.
ABSTRACT
One of the unusual reproductive features in cephalopods is the flexibility of sperm deposition sites in females. Recently we reported that female Enoploteuthis chunii possess not only a major sperm receptacle (MSR) but also a cryptic sperm pocket (CSP) and CSP utilization increases towards the end of the reproductive season. This may occur due to male-male competition over insemination sites, as a male-biased sex ratio and CSP utilization are tightly correlated. The microsatellite-based genotyping revealed that both MSR and CSP are used by the same males, a similar phenomenon previously found in Loliolus sumatrensis , which is herein hypothesized to be a strategy associated with sperm allocation.
PMID:40672114 | PMC:PMC12264711 | DOI:10.17912/micropub.biology.001538
Md Nur E Alam, Anri Yamane, Satoshi Kusama, Noriyosi Sato, Noritaka Hirohashi, Hiroki Ono
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MicroPubl Biol. 2025 Jul 2;2025. doi: 10.17912/micropub.biology.001538. eCollection 2025.
ABSTRACT
One of the unusual reproductive features in cephalopods is the flexibility of sperm deposition sites in females. Recently we reported that female Enoploteuthis chunii possess not only a major sperm receptacle (MSR) but also a cryptic sperm pocket (CSP) and CSP utilization increases towards the end of the reproductive season. This may occur due to male-male competition over insemination sites, as a male-biased sex ratio and CSP utilization are tightly correlated. The microsatellite-based genotyping revealed that both MSR and CSP are used by the same males, a similar phenomenon previously found in Loliolus sumatrensis , which is herein hypothesized to be a strategy associated with sperm allocation.
PMID:40672114 | PMC:PMC12264711 | DOI:10.17912/micropub.biology.001538
Md Nur E Alam, Anri Yamane, Satoshi Kusama, Noriyosi Sato, Noritaka Hirohashi, Hiroki Ono
Visit Publication page...
