Pattern of hyperphagia in immature three-spined sticklebacks after short-term food deprivation

Ali, Muhammad

doi:10.1006/jfbi.1999.1181

Cited by 3 publications

(3 citation statements)

References 7 publications

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“…The abundance of sticklebacks (A s ) was 6.4 m -2 ; the frequency of egg-consuming sticklebacks (F s ) was 8.4%; the mean body weight of sticklebacks (W s ) was 2.1 g; the mean weight of a pike egg (W pe ) was 0.01 g, and finally a daily food consumption (C s ) of 11.7% of stickleback body weight was assumed (Ali & Wootton, 2000). This gives a daily egg loss of 13.2 eggs m -2 from consumption by sticklebacks, which results in a total removal of 105.6 eggs m -2 over an 8-day incubation period, equivalent to a total mortality of 22.5%.…”

Section: Resultsmentioning

confidence: 99%

Predation of Northern Pike (Esox lucius L.) Eggs: A Possible Cause of Regionally Poor Recruitment in the Baltic Sea

Nilsson¹

2006

Hydrobiologia

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Northern pike (Esox lucius) spawning habitat and egg mortality were studied in three spawning areas in 2001 along the Swedish coast of the Baltic proper: the Blekinge Archipelago, Kalmar Sound and coastal freshwater streams. Spawning peaked during the last week of April in streams, at temperatures ranging from 7.7 to 8.9°C and during the first week of May in brackish waters, at temperatures ranging from 8.9 to 13.8°C. Spawning occurred in shallow waters, at depths between 0.2-1.5 m, but generally most of the spawn was found in the shallowest areas. In streams, eggs were mainly attached to emersed vegetation, while in brackish sites pike eggs were well scattered among flooded emersed plants, submersed plants and filamentous algae. Mean egg density varied between 469-1829 m -2 with the lowest density observed in Kalmar Sound. The calculated egg loss occurring from approximately one day after spawning to one day before hatching ranged from 41±7% in coastal streams to 67±6% in the Blekinge Archipelago and 100% in Kalmar Sound. The significant removal of eggs from spawning sites in Kalmar Sound and Blekinge was most likely due to predation from several fish species. In situ observations and stomach analyses suggested that many pike eggs in Kalmar Sound were lost to the three-spined stickleback (Gasterosteus aculeatus), a species that presently dominate the littoral small fish community. This study therefore suggests that egg predation by sticklebacks and other fishes may be a possible cause of the reported poor recruitment of coastal pike populations in the Kalmar Sound region.

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Section: Resultsmentioning

confidence: 99%

Predation of Northern Pike (Esox lucius L.) Eggs: A Possible Cause of Regionally Poor Recruitment in the Baltic Sea

Nilsson¹

2006

Hydrobiologia

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“…This represents a greater fish weight gain, as reported for sunfish by Hayward et al (9). For this reason, studies have been conducted on the factors that modulate this phenomenon such as duration of food restriction, age, speciesspecific differences (1), previous nutritional status (1,10,11), and grouping (12,13). No study, however, has considered sex-related compensatory growth.…”

Section: Introductionmentioning

confidence: 95%

“…Since Nile tilapia is the most extensively cultivated cichlid in the world, understanding the factors that modulate compensatory growth in this species is an extremely important goal for aquaculture management. The operational indicators of growth chosen to estimate better compensation were weight, specific growth rate, food conversion efficiency, and food intake, all being well-established indicators of compensatory growth in fish (1)(2)(3)10,24).…”

Section: Introductionmentioning

confidence: 99%

Sex-specific compensatory growth in food-deprived Nile tilapia

Barreto

Moreira

Carvalho

2003

Braz J Med Biol Res

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Female Nile tilapia incubate fertilized eggs in their mouth until they are released as alevins. Consequently, the female may not eat during this period. Thus, it would be expected that female Nile tilapia are more adapted to recovering from fasting than males, which do not display this behavior. To test this hypothesis we conducted an experiment with two groups of fish consisting of 7 males and 7 females each, with one fish per aquarium. The experiment was divided into three phases involving adjustment of the animals to experimental aquaria (0-15th day), fasting (16th-27th day), and refeeding (27th-42nd day). Compensatory growth performance was assessed by specific growth rate, weight, food conversion efficiency and food intake. Food conversion efficiency increased after fasting with a similar rate for both sexes. However, specific growth rate, food intake and weight gain (%) were significantly higher in males than in females in the refeeding phase. Thus, we conclude that male Nile tilapia can compensate for a fasting period more efficiently than females, refuting our hypothesis. A possible mechanism involved in the greater male compensation is that they presented greater hyperphagia than females, concomitantly with a similar rate of food conversion efficiency for both sexes during refeeding, which would probably be provoking greater growth in males.

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Dynamics of appetite in three fish species (Gasterosteus aculeatus , Phoxinus phoxinus and Carassius auratus gibelio ) after feed deprivation

Ali

Cui

Zhu

et al. 2001

Aquaculture Research

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The temporal dynamics of appetite (weight of food consumed per day) were analysed for ®sh fed to satiation after a 1 or 2-week period of feed deprivation. Three species were compared: two omnivores (minnow, Phoxinus phoxinus and gibel carp, Carassius auratus gibelio) and a carnivore (three-spined stickleback, Gasterosteus aculeatus). All species showed compensatory changes in appetite and growth during the re-feeding period but in the stickleback, there was a lag of a week before the compensatory response was detected. The temporal dynamics of appetite differed between the three species but not within a species. Appetite of the minnow declined towards control levels from the onset of re-feeding. In gibel carp, appetite increased to a peak and then declined to control levels. In the stickleback, appetite was initially below control levels, increased to a maximum, then declined towards control levels. The differences between the species might have been artefacts of the experimental protocols used but could also re¯ect underlying differences in the control of appetite in these species of ®sh.

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Pattern of hyperphagia in immature three-spined sticklebacks after short-term food deprivation

Cited by 3 publications

References 7 publications

Predation of Northern Pike (Esox lucius L.) Eggs: A Possible Cause of Regionally Poor Recruitment in the Baltic Sea

Predation of Northern Pike (Esox lucius L.) Eggs: A Possible Cause of Regionally Poor Recruitment in the Baltic Sea

Sex-specific compensatory growth in food-deprived Nile tilapia

Dynamics of appetite in three fish species (Gasterosteus aculeatus , Phoxinus phoxinus and Carassius auratus gibelio ) after feed deprivation

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