Evidence map›Paper›PMID 15293854›Full record

ArticleProceedings. Biological sciences2004

Breathing with a mouth full of eggs: respiratory consequences of mouthbrooding in cardinalfish.

Sara Ostlund-Nilsson, Göran E Nilsson

Abstract readComparative Study
In one paragraph

Article in Proceedings. Biological sciences, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

11 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

2 authors.

Sara Ostlund-NilssonDepartment of Biology, University of Oslo, PO Box 1066, N-0316 Oslo, Norway. s.x.nilsson@bio.uio.no
Göran E Nilsson

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Mouthbrooding occurs among several groups of fishes. Although a mouth full of eggs can be expected to pose a considerable respiratory problem, to our knowledge no study has examined respiratory consequences of mouthbrooding in fishes, or how hypoxia or strenuous swimming may affect the success of this reproductive strategy. In two species of cardinalfish (Apogon fragilis and Apogon leptacanthus), from the reef at Lizard Island (Great Barrier Reef), we found that mouthbrooding significantly reduced the ability to take up oxygen at low ambient oxygen levels. While the direct energetic cost of mouthbrooding appeared insignificant at rest in well-oxygenated water, mouthbrooding significantly reduced the respiratory scope of the fishes and their capacity for sustained aerobic swimming. The males spat out their eggs in hypoxia. Interestingly, the species with the larger brood, A. fragilis, spat out the brood at a higher water [O2] than did A. leptacanthus, which had a smaller mean brood mass. Moreover, in contrast to mouthbrooding A. leptacanthus, mouthbrooding A. fragilis was unable to increase its ventilatory frequency in response to hypoxia. This suggests a trade-off situation between hypoxia tolerance and brood size. Apparently, A. fragilis has sacrificed hypoxia tolerance in favour of a large brood size to a greater extent than has A. leptacanthus.

Indexed as

Paternal BehaviorAnalysis of VarianceAnimalsAustraliaLitter SizeMaleMouthOxygenOxygen ConsumptionPacific OceanPerciformesReproductionSwimmingOxygen

Identifiers

PMID15293854
PMCPMC1691693

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.