Importance of Nest and Paternal Characteristics for Hatching Success in Fathead Minnow

Divino, Jeffrey N.; Tonn, William M.

doi:10.1643/ce-06-245

Cited by 12 publications

(16 citation statements)

References 49 publications

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“…Despite reduced foraging activities during the breeding season (Unger 1983), males in social environments need to be present at the nest to defend against conspecifics and other egg predators (Divino & Tonn 2008) and ⁄ or compete for nesting territories regardless of the risk of predation. Egg infection rates were lower in the 2007 pond experiment relative to our previous experiments in the MBRS ponds (e.g., Divino & Tonn 2008), but nevertheless were significantly higher in the alarm substances treatment. In our experiments, the presence of alarm substance did not affect male investment in reproduction.…”

Section: Male Reproductive Investmentmentioning

confidence: 64%

“…However, in our population-level experiments, male behaviours were unchanged when exposed to alarm substances. Despite reduced foraging activities during the breeding season (Unger 1983), males in social environments need to be present at the nest to defend against conspecifics and other egg predators (Divino & Tonn 2008) and ⁄ or compete for nesting territories regardless of the risk of predation. Compared to individual behavioural experiments conducted in the laboratory, males in our experiments may have accepted higher levels of predation risk, as they were confronted with a more complex environment.…”

Section: Male Reproductive Investmentmentioning

confidence: 99%

“…Hatching success of eggs is largely dependent on male parental care in fathead minnow (Divino & Tonn 2008). Although changes to reproductive and nesting behaviour may have been more subtle than could be measured at the larger scale of our field experiments, the addition of alarm substances did not alter the hatching success or the rate of nest failures.…”

Section: Male Reproductive Investmentmentioning

confidence: 99%

“…Evidence of fungal infection was quantified as percentage of nests per trough or pond showing evidence of infection. We defined nest failure as a nest with no eggs surviving to hatching (Divino & Tonn 2008). We calculated spawning season as the number of days between the laying of the first and last egg for each pond or cattle trough, peak date was the day with the highest number of eggs present, and end date was the last day new eggs were laid per cattle trough or pond.…”

Section: Data Collectionmentioning

confidence: 99%

“…While monitoring nests, we recorded characteristics of nest-guarding males by adapting protocols from Divino & Tonn (2008). The percentage present was calculated from the number of times a male was present during nest-monitoring periods divided by the total number of observations made over the course of his nest.…”

Section: Data Collectionmentioning

confidence: 99%

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Alarm substances elicit limited population‐level responses in fathead minnow

Jung

Tonn

2011

Ecology of Freshwater Fish

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Alarm substances, chemical cues released by injured prey, are associated with increased predation risk. In the laboratory, fathead minnows limit conspicuous behaviours, such as foraging and nest guarding, when exposed to these cues. Although such responses could lead to reductions in growth and reproduction, with subsequent demographic consequences (e.g., recruitment), effects of alarm substances at the population level are largely unknown. In three field experiments, ponds and cattle troughs stocked with fathead minnow populations were treated with alarm substances or a water control over the summer breeding and growing season. Alarm substances had no effect on male parental behaviour. In one experiment, spawning occurred earlier with exposure to alarm substances; however, there was no subsequent effect on recruitment of young in this or in the other two experiments. Despite individual-level effects in short-term experiments, repeated exposure to alarm substances over a season had no measureable impact at the population scale.

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Section: Male Reproductive Investmentmentioning

confidence: 64%

Section: Male Reproductive Investmentmentioning

confidence: 99%

Section: Male Reproductive Investmentmentioning

confidence: 99%

Section: Data Collectionmentioning

confidence: 99%

Section: Data Collectionmentioning

confidence: 99%

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Alarm substances elicit limited population‐level responses in fathead minnow

Jung

Tonn

2011

Ecology of Freshwater Fish

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Effects of Environmentally Relevant Residual Levels of Diluted Bitumen on Wild Fathead Minnows (Pimephales promelas)

Timlick

Peters

Wallace

et al. 2020

Bull Environ Contam Toxicol

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Transportation of crude oil across North America's boreal ecozone creates the potential for spills in freshwater where less is known about the sensitivity of resident fish than for marine systems. The sensitivity of wild fathead minnows (FHM) to residual concentrations (ppb range) of the water accommodated fraction (WAF) of diluted bitumen (dilbit) was assessed by exposing them for 21 d followed by a 14 d depuration. Target concentrations were well below detection limits for GC-MS, but were estimated by dilution factor (1:100,000 and 1:1,000,000 WAF:water) to contain less than 0.0003 µg/L of polycyclic aromatic compounds. Confinement and handling stress caused by transfer of wild fish into tanks much smaller than their natural range resulted in mortality and lower body condition among all groups, but interactive effects of oil exposures still resulted in females with smaller cortical alveolar oocytes, and males with larger testicular lobe lumen sizes. Additional studies examining the compounded effects of stress and environmentally relevant oil exposures in wild fishes are needed.

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