The Disputed Feeding Behaviour of a Paedophagous Haplochromine Cichlid (Pisces) Observed and Discussed

Wilhelm, Walter E.

doi:10.1163/156853980x00528

Cited by 17 publications

(10 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fish biology * We must quantify interactions among food-web structures, water quality, and life-history characteristics of fishes in order to understand the relationship between fish production and the causes of eutrophication and anoxia in Lake Victoria. as baby suckers, or paedophages (Wilhelm 1980). Paedophages are predators with large mouths, thick rubbery lips, and odd, stout, outward-pointed anterior teeth.…”

Section: General Recommendationmentioning

confidence: 99%

Catastrophic Change in Species-Rich Freshwater Ecosystems

Kaufman¹

1992

BioScience

383

334

View full text Add to dashboard Cite

JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. University of California Press andAmerican Institute of Biological Sciences are collaborating with JSTOR to digitize, preserve and extend access to BioScience.

show abstract

Section: General Recommendationmentioning

confidence: 99%

Catastrophic Change in Species-Rich Freshwater Ecosystems

Kaufman¹

1992

BioScience

383

334

View full text Add to dashboard Cite

show abstract

“…Randall, 1967;Shiogaki & Dotsu, 1983;Whoriskey & FitzGerald, 1985;Daan, 1987;FitzGerald, 1992;Bloxam et al, 1996;Shine et al, 2004;Hirayama et al, 2005;Järnegren et al, 2005;Light et al, 2005;Mehlis & Bakker, 2009). In East African cichlid fish radiations, spectacular trophic behaviours like head-ramming and snout-engulfing allow some species specialising on eggs or fry of heterospecific fishes (Wilhelm, 1980;Ribbink & Lewis, 1981;McKaye & Kocher, 1983;McKaye & van den Berghe, 1997;Ribbink & Ribbink, 1997;Ochi et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Alternative egg-feeding tactics in Telmatherina sarasinorum, a trophic specialist of Lake Matano’s evolving sailfin silversides fish radiation

et al. 2012

View full text Add to dashboard Cite

Feeding specialisation is a typical feature of adaptive animal radiations. Different kinds of feeding specialisations have evolved in the endemic sailfin silversides species flock in Lake Matano (Central Sulawesi, Indonesia), including egg-feeding. The present study focuses on Telmatherina sarasinorum, a sailfin silverside species feeding on the eggs of related Telmatherina antoniae. Stomach content analyses supported T. antoniae eggs to be the dominant food item, independent of daytime. We hypothesized that the egg-feeders use alternative tactics for maximising egg consumption under varying densities of both, spawning T. antoniae pairs and competing conspecific egg-feeders. Focal behavioural observations were applied to describe different feeding tactics and to analyse feeding success and the related costs in terms of competitive interactions. Egg-feeders followed single courting pairs of T. antoniae or, alternatively, they switched between different spawning pairs. Following-behaviour, covering one or more spawning events of the host species, was positively related to enhanced egg consumption. Compared to feeding by switching frequently among different spawning pairs, the following tactic came at the cost of likewise increased competition. Behavioural observations suggest that some males monopolize courting pairs of T. antoniae and gain increased amounts of eggs compared to others avoiding competition by switching among pairs. The present results confirm that egg-feeding is a distinct trophic specialisation in T. sarasinorum and increase the scale of behavioural specialisation in Lake Matano's evolving Telmatherina radiation.

show abstract

“…However, increased protection of the brood may come at a cost to the parent. The most obvious cost of mouth brooding is that the parent is limited partially or completely from food intake while carrying a brood (Wilhelm 1980). Any extended length of starvation while brooding can negatively impact the parent's growth and future fecundity (Smith and Wootton 1994;Smith and Wootton 1995).…”

Section: Introductionmentioning

confidence: 99%

Brood protection at a cost: mouth brooding under hypoxia in an African cichlid

2007

View full text Add to dashboard Cite

This study quantifies the behavioral response of the widespread mouth brooding African cichlid Pseudocrenilabrus multicolor victoriae to progressive hypoxia. We exposed four gender/stage classes of P. multicolor (males, brooding females, females that had just released young, and nonbrooding females) to progressive hypoxia and recorded the percent time spent using aquatic surface respiration (surface skimming, ASR) and gill ventilation rates. This was done for fish collected from three sites in Uganda (lake, swamp, and river) after long-term acclimation to normoxia. There was no effect of site of origin on response to hypoxia, but ASR thresholds did differ between gender/stage classes. The oxygen level (threshold) at which spent 10, 50, and 90% of their time at the surface using ASR was much higher for brooding females than for males, whereas ASR thresholds did not differ between non-brooding females and males. Similarly, the level at which ASR was initiated was much higher in brooding females than males, but did not differ between males and non-brooders, or between males and females than had just released young. The rate of gill ventilation dropped significantly in males and all stages of females after initiation of ASR, suggesting that surface skimming increases efficiency of oxygen acquisition. These results suggest that mouth brooding in female P. multicolor ASR improves oxygen uptake but imposes a cost in terms of time spent at the water surface, and this may affect maternal predation risk in low-oxygen habitats.

show abstract

The Disputed Feeding Behaviour of a Paedophagous Haplochromine Cichlid (Pisces) Observed and Discussed

Cited by 17 publications

References 7 publications

Catastrophic Change in Species-Rich Freshwater Ecosystems

Catastrophic Change in Species-Rich Freshwater Ecosystems

Alternative egg-feeding tactics in Telmatherina sarasinorum, a trophic specialist of Lake Matano’s evolving sailfin silversides fish radiation

Brood protection at a cost: mouth brooding under hypoxia in an African cichlid

Contact Info

Product

Resources

About