Analysis of Size Changes and Incremental Growth Structures in African Catfish Synodontis schall(schall) from Tell el-Amarna, Middle Egypt

Luff, Rosemary Margaret; Bailey, G.

doi:10.1006/jasc.1999.0519

Cited by 23 publications

(16 citation statements)

References 8 publications

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“…These likely correspond to S. schall and S. frontosus, which are the only two Synodontis species that inhabit the Omo-Turkana Basin. One species had spines identical to those pictured in the literature for S. schall (e.g., von den Driesch, 1983;Luff and Bailey, 2000). Pectoral and dorsal spines from modern individuals from the Omo River are figured and described in Figs.…”

Section: Syndontis?mentioning

confidence: 56%

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Quaternary fossil fish from the Kibish Formation, Omo Valley, Ethiopia

Trapani

2008

Journal of Human Evolution

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Section: Syndontis?mentioning

confidence: 56%

“…1 (#8) of Gayet and Van Neer (1990) with Fig. 2 of Luff and Bailey (2000)], I found two types of spines in individuals of similar size, with no intermediates. Covariation between serration patterns on dorsal and pectoral spines corroborates the hypothesis that there are two species.…”

Section: Syndontis?mentioning

confidence: 62%

Quaternary fossil fish from the Kibish Formation, Omo Valley, Ethiopia

Trapani

2008

Journal of Human Evolution

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“…3 Expression of the characters for the dorsal spine of S. schall (a), B. batensoda (b), S. sorex (c), H. membranaceus (d), and fossils specimens (w, x, y, z) from the Late Miocene of Chad (e). The median (square), quartiles (error bar) and extreme values (open circle) are given for the continuous characters (9,10,11) [11]. Last but not least, the specific determination of the Synodontis remains found in the numerous Mio-Pliocene African sites should enable the reconstruction of the dynamics of ancient hydrographic basins at the time of early hominid diversification.…”

Section: Discussionmentioning

confidence: 99%

Spine anatomy reveals the diversity of catfish through time: a case study of Synodontis (Siluriformes)

Pinton¹,

Fara²,

Otero³

2005

Naturwissenschaften

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Synodontis (Mochokidae, Siluriformes) is a freshwater catfish endemic to Africa. The 118 extant species are present in almost all hydrographic basins. Some species are restricted to a single stream, whereas others have a vast distribution. Synodontis is known in the fossil record since the Miocene, and its history depends on the connections among African basins through time. The identification of species in the fossil record is essential to reconstruct this historical pattern. Catfish pectoral and dorsal spines are robust, they preserve well and they form most of the fossil remains for the genus Synodontis. Unfortunately, the criteria for the identification of extant Synodontis species are not applicable to fossil specimens. Here, we define 11 original morphological characters that permit to discriminate four extant species from the Chad-Chari hydrographic system. Six of these characters are defined on pectoral spines and five on dorsal spines. We then show that these characters can be used successfully for identifying fossil specimens. In particular, we present a case study in which we identify Synodontis cf. schall and Brachysynodontis cf. batensoda in the hominid-bearing sector Toros-Menalla (Late Miocene, northern Chad). We show that spine anatomy can be a powerful tool to recognise catfish species through time and thus to identify historical diversity pattern.

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“…The impact of these variables on limpet size is well established, the reduction in growth rates of limpets on exposed shores and high in the intertidal zone being due to the reduced time available for feeding (Ebling et al, 1962;Lewis and Bowman, 1975;Fretter and Graham, 1976;Jones, 1984). Increased predation pressure, by removing the older and larger animals, can also result in size reduction, although animals of a given age class may actually be larger than their counterparts in a less heavily exploited population because of higher growth rates (Swadling, 1976;Luff and Bailey, 2000). The impact of nonhuman predators such as starfish or aquatic birds should not be underestimated, since they can remove huge quantities of molluscs, with a corresponding impact on abundance, growth rates, and demographic structure.…”

Section: Size Changesmentioning

confidence: 96%

Late Pleistocene and Holocene coastal palaeoeconomies: A reconsideration of the molluscan evidence from northern Spain

Bailey

Craighead²

2003

Geoarchaeology

121

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The worldwide increase in shell midden deposits on coastlines during the Holocene has been variously explained as the result of human population growth, economic intensification, changes in the visibility of midden deposits with changes in sea level, or climatic and environmental changes. Since coastlines are relatively unstable in geological and ecological terms, and since many archaeological sequences span periods of major climatic change, a critical issue is the ability to disentangle palaeoenvironmental from cultural and anthropogenic effects. We draw on a case study from the cave sequences of northern Spain to illustrate the problems and possibilities of palaeoeconomic and palaeoenvironmental interpretation, using studies of palaeogeographical context and analysis of abundance, taxonomic representation, ecological tolerances, size, growth structures, and other physical and chemical characteristics of the molluscs themselves. We demonstrate that the dominant, but by no means exclusive, factor in archaeologically visible long-term changes in shell-gathering behavior is environmental change rather than cultural change. ᭧

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Analysis of Size Changes and Incremental Growth Structures in African Catfish Synodontis schall(schall) from Tell el-Amarna, Middle Egypt

Cited by 23 publications

References 8 publications

Quaternary fossil fish from the Kibish Formation, Omo Valley, Ethiopia

Quaternary fossil fish from the Kibish Formation, Omo Valley, Ethiopia

Spine anatomy reveals the diversity of catfish through time: a case study of Synodontis (Siluriformes)

Late Pleistocene and Holocene coastal palaeoeconomies: A reconsideration of the molluscan evidence from northern Spain

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