Distinguishing kinds of prior dominance and subordination experiences in males of green swordtail fish (Xiphophorus helleri)

Beaugrand, Jacques P.; Goulet, Claude

doi:10.1016/s0376-6357(00)00096-6

Cited by 45 publications

(37 citation statements)

References 33 publications

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“…The lack of winner and loser effects in this study runs contrary to several other examinations of social experience in green swordtails (see, for example, Beaugrand & Goulet 2000). However, in none of these earlier studies were the previous winner or loser pitted against a naive individual, as in our opaque treatment.…”

Section: Proc R Soc Lond B (2002)contrasting

confidence: 99%

Eavesdropping on visual cues in green swordtail (Xiphophorus helleri) fights: a case for networking

Earley

Dugatkin

2002

Proc. R. Soc. Lond. B

153

106

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Aggressive contests probably occur in networking environments where information about ® ghting ability is conveyed both to an opponent and to individuals peripheral to the ® ght itself, the bystanders. Our primary aim was to investigate the relative in¯uences of eavesdropping and prior social experience on the dynamics of aggressive contests in Xiphophorus helleri. A bystander' s ability to witness an encounter was manipulated using clear, one-way mirror, and opaque partitions. After watching (or not watching) the initial contest, the bystander encountered either the winner or loser of the bout. Treatment comparisons of bystander± winner or bystander± loser contest dynamics indicated the presence or absence of winner, loser, or eavesdropping effects. Winner and loser effects had negligible in¯uences on bystander contest dynamics. Eavesdropping signi® cantly reduced the bystander's propensity to initiate aggression, escalate, and win against seen winners regardless of whether the watched bout had escalated or not. Though eavesdropping had relatively little effect on bystander± loser contest dynamics, bystanders were less prone to initiate aggression and win against losers that had escalated in the witnessed bout. Thus, bystanders appear to preferentially retain and utilize information gained about potentially dangerous opponents (winners or persistent losers). Our data lend clear support for the importance of eavesdropping in visually based aggressive signalling systems.

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Section: Proc R Soc Lond B (2002)contrasting

confidence: 99%

Eavesdropping on visual cues in green swordtail (Xiphophorus helleri) fights: a case for networking

Earley

Dugatkin

2002

Proc. R. Soc. Lond. B

153

106

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“…The largest number of interactions (albeit low) was observed between large residents and large intruders where the number of chases and bites by the resident were significantly greater than those exhibited by the intruder. Beaugrand & Goulet (2000) suggested that winning or losing against a well-matched opponent provides more 'experience' than winning to a weak opponent or losing to a strong one. There were no significant differences between the frequency of behavioural interactions and residency status in the other three treatments (LR/ SI, SR/LI, SR/SI).…”

Section: Discussionmentioning

confidence: 99%

“…When individuals remain in a group, a stable hierarchy forms as each member is able to discriminate among its neighbours, yet reinforcing displays may be initially frequent (Beaugrand & Goulet 2000). The ability of the round goby to perceive small differences in size between potential opponents may reduce the number of interactions among conspecifics and might account for the colonial habits of the species.…”

Section: Discussionmentioning

confidence: 99%

“…Animals that engage in interactions make assessments about contested territories (or resources) and the fighting ability of the owner relative to the intruder (Parker 1974, Barlow 1983. Winners in territorial disputes are determined by the effect of prior residence (Braddock 1949, Figler & Einhorn 1983, body size (Parker 1974, Faria et al 1998, previous experience (Beacham 1988, Beaugrand & Goulet 2000 or combinations of factors (Takahashi et al 2001).…”

Section: Introductionmentioning

confidence: 99%

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Assessment of fish size on shelter choice and intraspecific interactions by round gobies Neogobius melanostomus

Stammler

Corkum

2005

Environ Biol Fish

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We examined shelter occupancy and behavioural interactions in non-reproductive male round gobies, Neogobius melanostomus, an invasive fish, to determine if gobies can assess one another's prowess effectively. Results of laboratory experiments revealed a significant, positive relationship between body size (total mass) and time for individual fish to occupy shelters. Shelter size selection did not vary with body size, but males that abandoned shelters were smaller than those that remained. Overall, the number of interactions between residents and intruders were low with most interactions occurring between large residents and large intruders. A size differential between residents and intruders of 3% was sufficient to predict the proportion of victories in conflicts between round gobies. This ability of the round goby to perceive size differences between themselves and potential opponents reduces the number of interactions and may account for the occurrence of high densities of round gobies observed in the field.

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“…Species of live-bearing fishes of the genus Xiphophorus can be hybridized and are widely used in diverse areas of contemporary scientific research, including evolution [1,2], sex determination [3][4][5], endocrinology [6,7], ethology and behavioral ecology [8][9][10][11], toxicology [12,13], parasitology [14,15], immunology [16,17], and cancer genetics [18][19][20]. In the 1920s, Myron Gordon published a report showing that hybrids between the platyfish Xiphophorus maculatus and the green swordtail Xiphophorus helleri developed cancers virtually identical to malignant melanomas in man (for review see [20]).…”

Section: Introductionmentioning

confidence: 99%

Initial studies on sperm cryopreservation of a live-bearing fish, the green swordtail Xiphophorus helleri

et al. 2004

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Swordtails and platyfish of the genus Xiphophorus are valuable models for biomedical research and are also commercially raised as ornamental fish valued by aquarists. While research use and commercial interest increases yearly in these fish, cryopreservation of sperm is unexplored in this genus. Xiphophorus are live-bearing fishes characterized by small body sizes, limited sperm volumes, and internal fertilization, an atypical reproductive mode for fish. These attributes make research involving cryopreservation of Xiphophorus germplasm challenging. To explore methods for sperm cryopreservation, this study evaluated the effect of different loading volumes of sperm suspension in 0.25-ml French straws, different dilution ratios of sperm to extender, an osmolality range of extender without cryoprotectant and with dimethyl sulfoxide (DMSO) as cryoprotectant, and short-term storage at room temperature and 4 °C after thawing. No significant difference in sperm motility due to straw loading volume was observed after thawing. Sperm motility was observed to decrease with increasing dilution. The osmolality of Hanks' balanced salt solution (HBSS) without cryoprotectant in which the highest sperm motility (67%) was observed was 320 ± 3 mOsm/kg, which was also the osmolality of X. helleri blood plasma. When cryopreserved with 10% DMSO, however, the highest motilities within 10 min after thawing were observed with HBSS in the range of 240-300 mOsm/kg. Sperm suspended in HBSS at 320 mOsm/kg with a dilution factor of 100 maintained motility for 24 h at room temperature, but persisted for 10 days when stored at 4 °C. These results provided the first evidence that cryopreservation may be applied to conservation of genetic resources in live-bearing fishes.

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Distinguishing kinds of prior dominance and subordination experiences in males of green swordtail fish (Xiphophorus helleri)

Cited by 45 publications

References 33 publications

Eavesdropping on visual cues in green swordtail (Xiphophorus helleri) fights: a case for networking

Eavesdropping on visual cues in green swordtail (Xiphophorus helleri) fights: a case for networking

Assessment of fish size on shelter choice and intraspecific interactions by round gobies Neogobius melanostomus

Initial studies on sperm cryopreservation of a live-bearing fish, the green swordtail Xiphophorus helleri

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