Habitat Partitioning among Size Classes of Larval Southern Leopard Frogs, Rana utricularia

Alford, Ross A.; Crump, Martha L.

doi:10.2307/1444617

Cited by 32 publications

(21 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Growth and differentiation rates can also be greatly affected by intra-and inter specific competition (Hota and Dash, 1981;Semlitsch, 1987;Cummins, 1989), since extreme population densities are quite common in ephemeral ponds. Alford and Harris (1988) demonstrated that growth, and hence differentiation rates, respond to alterations in food availability that occur at any point during the larval period. However, before food competition causes negative effects, it seems that "social stress" becomes decisive (Adolph, 1931;Alford and Crump, 1982).…”

Section: Discussionmentioning

confidence: 99%

“…Alford and Harris (1988) demonstrated that growth, and hence differentiation rates, respond to alterations in food availability that occur at any point during the larval period. However, before food competition causes negative effects, it seems that "social stress" becomes decisive (Adolph, 1931;Alford and Crump, 1982). Gromko et al (1973) and John and Fenster (1975) assumed that behavioral interactions and their influence on the hormonal control of growth account for the crowding effect.…”

Section: Discussionmentioning

confidence: 99%

“…Gromko et al (1973) and John and Fenster (1975) assumed that behavioral interactions and their influence on the hormonal control of growth account for the crowding effect. For a wide spectrum of anurans, unfavorable growth conditions like an increased physical harshness (Warner et al 1991), a restriction in food supply (Hota and Dash, 1981;Semlitsch, 1987;Alford and Harris, 1988), or an increased population density (Dash and Hota, 1980;Pandian and Marian, 1985;Warner et aI., 1991) cause slower growth rates, a delay of metamorphosis, and a reduction in transformation size (Wilbur and Collins, 1973). In agreement with the findings on other anurans (Wilbur, 1977;Crump, 1981;Warner et aI., 1991), Hyperolius reached its maximum body length at metamorphosis only at lower levels of intra specific crowding (LD).…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Life Cycle Strategies and Physiological Adjustments of Reedfrog Tadpoles (Amphibia, Anura, Hyperoliidae) in Relation to Environmental Conditions

Schmuck¹,

Geise²,

Linsenmair³

1994

Copeia

View full text Add to dashboard Cite

The relationship between different degrees of intraspecific crowding of reedfrog tadpoles and their physiological responses to a deterioration of the natal pond water quality was examined under laboratory conditions. Tadpoles that were reared at a lower density metamorphosed significantly earlier than those raised at a higher density. As density increases, the average body length at metamorphosis decreases. However, at low tadpole density, a significantly higher diversity of body size classes among freshly metamorphosed froglets was observed than under more crowded conditions. Mortality increased during metamorphic climax and was inversely correlated with the tadpole density.In ephemeral ponds, an accumulation of nitrogenous wastes from metabolic processes and/or a concentration by evaporation in prolonged rainless periods can pose a considerable chemical stress to reedfrog tadpoles. Hyperolius viridiflavus ommatostictus responded to an increasing ammonia concentration with an activity increase of the ornithine cycle (intensified urea synthesis). hi contrast, Hyperolius marmoratus taeniatus exhibited a strong tolerance against high ammonia levels.A deterioration of the natal pond water quality caused H. v. ommatostictus and H. v. nitidulus tadpoles to adjust to harsher climatic conditions at the time of metamorphosis. This physiological preadjustment enabled the froglets to start feeding and growing immediately after metamorphosis even at low air humidity and rare precipitation events. In contrast, froglets that were raised in daily refreshed water exhibited high mortality rates if subjected to identical conditions. As one possible indicator of the actual climatic conditions prevailing in the surrounding terrestrial habitat, fluctuations in the water ammonia level are discussed.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Life Cycle Strategies and Physiological Adjustments of Reedfrog Tadpoles (Amphibia, Anura, Hyperoliidae) in Relation to Environmental Conditions

Schmuck¹,

Geise²,

Linsenmair³

1994

Copeia

View full text Add to dashboard Cite

show abstract

“…Others consider species distribution in ponds as a consequence of food availability and influence of feeding strategies among tadpoles of different sizes (ALFORD & CRUMP 1982, DIAZ PANIAGUA 1985, ETEROVICK & BARROS 2003.…”

mentioning

confidence: 99%

Macroinvertebrates as tadpole food: importance and body size relationships

Dutra

Callisto

2005

Rev. Bras. Zool.

View full text Add to dashboard Cite

Macroinvertebrates as food were recorded for three anurans tadpoles: Hyla saxicola (Bokermann, 1964) (Hylidae), Scinax machadoi (Bokermann & Sazima, 1973) (Hylidae), and Bufo rubescens (Lutz, 1925) (Bufonidae). These species are commonly found in the mountain streams at Serra do Cipó National Park, Minas Gerais State, Brazil. Tadpoles were collected in pools of second-order reach in Mascates stream and third and fourth order reaches of Indaiá stream from March-October, 2003. Biometrical data were recorded before dissecting each individual and a feeding importance index was estimated. Eight taxa of chironomids and three taxa of mayfly exuviae were found in the guts, but no significantly differences were found between tadpole species (ANOVA, p > 0.05). The results support the drift transport hypothesis that predicts that tadpoles commonly ingest suspended matter in lotic ecosystems, are generalist feeders, and macroinvertebrates are probably incidental ingested.

show abstract

“…Others used a vertical sampler (an open-ended cyli ndrical PVC tube placed vertically in the water column) to examine hahitat-use hy various tadpole species (ALFORD & CRUMP 1982;ALFORD 1986) . These tec hniques are adequate for estimating re\ative ahundances or spatial pattems of habitat use in a given site.…”

mentioning

confidence: 99%

Bottom-nets as a new method for quantitatively sampling tadpole populations (Amphibia, Anura)

Gascon

1994

Rev. Bras. Zool.

View full text Add to dashboard Cite

ABSTRACT. A new techniqué to reliahly estimate true tadpole abu ndance in small cphcmeral forest ponds based on a samplé taken from a bottom net is presented. The bottom net is placcd in lhe pond before it fills wilh waler. At given intcrvals the bottom nd is lifted through the walér column and ali tadpoies can be counted . Based on a series of calihrations. the téchnique showcd significant corrdations hetween estimated ahundanee 01' O.l'/eocephall/

show abstract

Habitat Partitioning among Size Classes of Larval Southern Leopard Frogs, Rana utricularia

Cited by 32 publications

References 16 publications

Life Cycle Strategies and Physiological Adjustments of Reedfrog Tadpoles (Amphibia, Anura, Hyperoliidae) in Relation to Environmental Conditions

Life Cycle Strategies and Physiological Adjustments of Reedfrog Tadpoles (Amphibia, Anura, Hyperoliidae) in Relation to Environmental Conditions

Macroinvertebrates as tadpole food: importance and body size relationships

Bottom-nets as a new method for quantitatively sampling tadpole populations (Amphibia, Anura)

Contact Info

Product

Resources

About