Spermatophore consumption in a cephalopod

Wegener, Benjamin Joel; Stuart‐Fox, Devi; Norman, Mark D.; Wong, Bob B. M.

doi:10.1098/rsbl.2013.0192

Cited by 12 publications

(8 citation statements)

References 23 publications

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“…Similar to other decapod cephalopods (Cephalopoda: Decapodiformes), fertilisation in most bobtail squids (Decapodiformes: Sepiolida) takes place externally (Rodrigues et al, 2009; Squires et al, 2013; Wegener et al, 2013). However in at least one species, the pelagic Heteroteuthis dispar , fertilisation has been reported to take place either in the female oviducts or visceropericardio coelom through what the authors refer to as “confined external fertilisation” (Hoving et al, 2008).…”

Section: Reproductive Biology Of Cephalopodsmentioning

confidence: 99%

“…However, the exact processes for how female promiscuity might lead to enhanced offspring quality still remain unclear. It has been previously hypothesised that nutritional benefits provided from accessory seminal fluids, obtained either through spermatophore consumption or absorption within the female reproductive tract, can help to increase metabolic resources females have available toward producing healthy offspring (Squires et al, 2012; Wegener et al, 2013). A controlled study of Euprymna tasmanica has indicated that females of this species, which mated multiply, laid eggs with a higher hatchling to egg mass ratio than females that were only allowed to mate once (Squires et al, 2012).…”

Section: Conclusion and New Directions For Researchmentioning

confidence: 99%

“…Females in some species are known to be selective of mates (Hall and Hanlon, 2002; Wada et al, 2005a), can store sperm (Perez et al, 1990; Hanlon et al, 1999; Morse, 2008; Hoving et al, 2010; Bush et al, 2012; Cuccu et al, 2014) and can potentially be selective about which sperm they use (Naud et al, 2004; Shaw and Sauer, 2004; Buresch et al, 2009; Sato et al, 2013). While females of the southern bottletail squid ( Sepiadarium austrinum ) can gain nutritional and likely fecundity benefits through the consumption of spermatophores (Wegener et al, 2013), in most cases females receive no identifiable resources or parental care from the males they mate with. This suggests that male quality and/or genomic compatibility might be important factors in female mate selection, as observed in other animals (Jennions and Petrie, 1997; Tregenza and Wedell, 2000; Kokko et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

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Tactical Tentacles: New Insights on the Processes of Sexual Selection Among the Cephalopoda

Morse

Huffard

2019

Front. Physiol.

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The cephalopods (Mollusca: Cephalopoda) are an exceptional class among the invertebrates, characterised by the advanced development of their conditional learning abilities, long-term memories, capacity for rapid colour change and extremely adaptable hydrostatic skeletons. These traits enable cephalopods to occupy diverse marine ecological niches, become successful predators, employ sophisticated predator avoidance behaviours and have complex intraspecific interactions. Where studied, observations of cephalopod mating systems have revealed detailed insights to the life histories and behavioural ecologies of these animals. The reproductive biology of cephalopods is typified by high levels of both male and female promiscuity, alternative mating tactics, long-term sperm storage prior to spawning, and the capacity for intricate visual displays and/or use of a distinct sensory ecology. This review summarises the current understanding of cephalopod reproductive biology, and where investigated, how both pre-copulatory behaviours and post-copulatory fertilisation patterns can influence the processes of sexual selection. Overall, it is concluded that sperm competition and possibly cryptic female choice are likely to be critical determinants of which individuals' alleles get transferred to subsequent generations in cephalopod mating systems. Additionally, it is emphasised that the optimisation of offspring quality and/or fertilisation bias to genetically compatible males are necessary drivers for the proliferation of polyandry observed among cephalopods, and potential methods for testing these hypotheses are proposed within the conclusion of this review. Further gaps within the current knowledge of how sexual selection operates in this group are also highlighted, in the hopes of prompting new directions for research of the distinctive mating systems in this unique lineage.

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Section: Reproductive Biology Of Cephalopodsmentioning

confidence: 99%

Section: Conclusion and New Directions For Researchmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tactical Tentacles: New Insights on the Processes of Sexual Selection Among the Cephalopoda

Morse

Huffard

2019

Front. Physiol.

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“…Van Oordt (1938) observed whole spermatangia inside the seminal receptacle in Loligo vulgaris, and used this observation to forward the hypothesis of muscular suction generated by the seminal receptacle. Manipulation of attached spermatangia by the female has been reported in Idiosepius paradoxus (Sato et al, 2013) and in Sepiadarium austrinum (Wegener et al, 2013), but these cases were associated with removal or ingestion, rather than with sperm transfer.…”

mentioning

confidence: 99%

Whole spermatangia within the seminal receptacles of female chokka squid (Loligo reynaudii d’Orbigny, 1839–1841)

Sato

Iwata

Shaw

et al. 2018

Journal of Molluscan Studies

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“…We did not determinate the number of eggs carried by the guarded females; however, this strategy could represent a cryptic male choice, as males could bias their mateguarding efforts towards particular females [Aumon and Shuker, 2018]. The bobtail squid Sepiadarium austrinum exhibited strategic male choice as their mating efforts were more substantial towards egg-carrying females [Wegener et al, 2013, Hooper et al, 2016. Similarly, large male Abdopus aculeatus copulate frequently in mate-guarding situations with large females [Huffard et al, 2008b].…”

Section: Sex Ratiomentioning

confidence: 99%

Neuroethology of the visual communication in the mourning cuttlefish Sepia plangon

Galan¹

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Animals communicate in response to different tasks, including alarm calls, allocation of food, courtship, and mating. Different types of signals are used by animals to communicate, such as chemical signals, vocalisations, colour patterns, and movements. Animal colouration and visual communication have fascinated researchers for decades. Behavioural, anatomical and functional studies are commonly used to study visual communication in both vertebrates and invertebrates. Cuttlefish are well known for possessing intricate body patterns. Cuttlefish use these colourful and dynamic displays to communicate with mates, camouflage, and pursue prey. The cuttlefish central nervous system processes all the visual stimuli and coordinates the expression of postures, body movements, skin textures and colourations that form a body pattern. Interestingly, many species of cuttlefish are colour blind but possess polarisation vision and polarisation patterns in their bodies, which are potentially used for communication with conspecifics. The objective of this thesis is to analyse the mechanisms influencing visual communication and colour patterns in a small coastal cuttlefish Sepia plangon. The mourning cuttlefish S. plangon is a small species with a mantle length (ML) < 140 mm. This species inhabits coastal waters and prefers to forage in seaweed and seagrass environments. It is located to a maximum depth of 85 meters and is active during the day. After introducing the topic of this thesis in detail in chapter 1, we analysed the ontogenetic changes of S. plangon body patterns from embryos to adults in chapter 2. The first description of S. plangon eggs and embryos is included in this chapter. However, because the eggs were collected from their natural environment, only late embryonic development was described. The number and complexity of the body patterns of S. plangon changed throughout the lifespan, transitioning from three body patterns in embryos to a maximum of 18 in males. Seven patterns were exclusive to males and used only during reproductive behaviour. Therefore, in chapter 3, we analysed courtship, mating, and agonistic competition of S. plangon. Three sex ratios were used to study mate choice: 1Male(M):1F(F), 2M:1F, and 1M:2F. Polarised and unpolarised filters were placed between the animals to test the effect of modifying polarised stimuli in the reproductive behaviour of S. plangon. 3D printed cuttlefish models were used to manipulate specific traits (two body sizes, two postures, four body patterns) and determine which factor was crucial to successful mating. The components of the body patterns, reproductive behaviours and visual signals were analysed. We found that only sex ratio had a significant effect on male courtship frequency. Agonistic competition between males included visual signals, and most males avoided fighting. Small males (ML < 80 mm) used a deceptive display to mimic female patterns, avoid male competitions, and mate with females. The dynamic changes in body patterns were the most crucial element for ...

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Spermatophore consumption in a cephalopod

Cited by 12 publications

References 23 publications

Tactical Tentacles: New Insights on the Processes of Sexual Selection Among the Cephalopoda

Tactical Tentacles: New Insights on the Processes of Sexual Selection Among the Cephalopoda

Whole spermatangia within the seminal receptacles of female chokka squid (Loligo reynaudii d’Orbigny, 1839–1841)

Neuroethology of the visual communication in the mourning cuttlefish Sepia plangon

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