Mass mortality of a HoloceneTagelus plebeius (Mollusca, Bivalvia) population in the Bahía Blanca Estuary, Argentina

Farinati, Ester A.; Aliotta, Salvador; Ginsberg, Silvia Susana

doi:10.1016/0025-3227(92)90135-5

Cited by 28 publications

(16 citation statements)

References 5 publications

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“…The long thin shells of deep burrowers could be an advantage because less energy is invested in shell growth (URBAN 1994). Species of the family Solecurtidae can burrow at least 50 cm in the substrate (FARINATI et al 1992), as also observed by ABRAHÃO & AMARAL (1999) and ARRUDA et al (2003).…”

Section: Resultssupporting

confidence: 56%

Population biology and secondary production of the stout razor clam Tagelus plebeius (Bivalvia, Solecurtidae) on a sandflat in southeastern Brazil

Abrahão¹,

Cardoso²,

Yokoyama³

et al. 2010

Zoologia (Curitiba, Impr.)

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The population biology and production of the stout razor clam Tagelus plebeius Lightfoot, 1786 were investigated on an intertidal sandflat on the southeast coast of Brazil (Enseada Beach, São Sebastião, state of São Paulo) between April 1997 and April 1998. Two rectangular sites of 50 X 10 m parallel to the waterline were established, site A (upper intertidal level) and site B (middle intertidal level), where the samples were taken in an 0.5 x 0.5 m quadrat. High abundances were recorded in winter and spring, with no significant differences between the sites. The high bivalve abundances were related to the presence of very fine homogeneous sediment with low salinities. Tagelus plebeius had negative allometric growth, characteristic of deep burrowers for the relationships DM/SL and AFDM/SL. Parameters of the modified von Bertalanffy growth function were: L∞ = 67.01 mm, K = 1.73 year-1, t0 = -0.11 year, C = 0.43, WP = 0.96. The instantaneous mortality (Z) was 3.12 year-1, relatively high in comparison to other tropical bivalve populations. Secondary production was 1.53 g AFDM m-2 year-1, with a P/B ratio reaching 1.37 year-1. This high turnover ratio (P/B) was related to a rapid population replacement, connected with the short life span and high mortality of the species

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Section: Resultssupporting

confidence: 56%

Population biology and secondary production of the stout razor clam Tagelus plebeius (Bivalvia, Solecurtidae) on a sandflat in southeastern Brazil

Abrahão¹,

Cardoso²,

Yokoyama³

et al. 2010

Zoologia (Curitiba, Impr.)

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“…In the Bahía Blanca region and above the m.s.l., Holocene marine deposits are found in the subsurface in places near the present shoreline (González et al, 1983;González, 1989;Aliotta et al, 1987;Farinati and Aliotta, 1987;Aliotta and Farinati, 1990;Farinati et al, 1992). The last Holocene transgression produced a series of sand-shell ridges that are subparallel to the shoreline up to 10 m above the present m.s.l.…”

Section: Introductionmentioning

confidence: 93%

Submarine evidence of Holocene sea-level fluctuations in the Bahía Blanca estuary, Argentina

Gómez

Martínez

Borel

et al. 2005

Journal of South American Earth Sciences

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“…Little evidence supports the belief that signi cant numbers of epifaunal and near-surface infaunal animals simply decay away after death, except under rare cataclysmic events such as anoxic episodes (e.g. Farinati et al 1992;Faganeli et al 1985). Predation accounts for most of natural mortality in most populations (Menzel et al 1957;Vermeij 1980;Vermeij & Zipser 1986;Marelli & Arnold 1996;Seed & Suchanek 1992; but see Evans 1983).…”

Section: Paleoutilization Ef Ciencymentioning

confidence: 99%

Application of trophic transfer efficiency and age structure in the trophic analysis of fossil assemblages

Powell

Staff

Stanton

et al. 2001

LET

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2001 06 15: Application of trophic transfer ef ciency and age structure in the trophic analysis of fossil assemblages. Lethaia, Vol. 34, pp. 97-118. Oslo. ISSN 0024-1164. We evaluate onshore-offshore trends in age-frequency distributions and trophic transfer ef ciencies using 11 modern death assemblages off the Texas coast. Trophic transfer ef ciencies within trophic levels offer little insight over that achieved by a size-frequency distribution. Production/biomass ratios will always be 1 in the fossil record. Within trophic-level estimates of paleogrowth ef ciency, the ratio of paleoproduction to paleoingestion (P i g lt /I i lt where i indicates the i th trophic level and lt indicates the timeaveraged value) follow the expected ecological trend precisely in that paleogrowth efciency is consistently higher in primary consumers than in predators in all 11 death assemblages. Paleoutilization ef ciency, the ratio of predator paleoingestion to prey paleoproduction, I 2°l t /P 1°g lt , may provide information on the degree of bias in the preservation of primary (1°) and secondary (2°) consumer trophic groups. I 2°l t /P 1°g lt fell below 0.1 in most cold-seep and bay assemblages, indicating a large surplus of primary consumers. In sharp contrast, I 2°l t /P 1°g lt was above 10.0 in most heterotrophic continental slope and inner continental shelf assemblages, indicating an overrepresentation of predators. In the classic food web, predator life span should exceed prey life span (¢L lt :. Predators should be more insulated from uctuations in food supply than their prey and the degree of this insulation should control ¢L lt . Of the 11 death assemblages covering the bay-to-continental slope transect, predators' life spans were longer than their prey only on the continental shelf and slope, indicating a requirement for a stable enough environmental regime to permit biological processes rather than physical factors to control life spans. Paleoproduction transfer ef ciency, the ratio of paleoproduction between two consecutive trophic levels, P 2ḡ lt =P 1ḡ lt , is the most accurately estimated trophic transfer ef ciency in paleoecology because it does not require an estimate of age-at-death. The relationships of paleoutilization ef ciency and paleoproduction transfer ef ciency are nearly identical among the 11 death assemblages. Although theoretically this need not be the case, these assemblages suggest that predator overrepresentation might be identi ed from a ratio dependent solely upon size-atdeath. &Age frequency, death assemblage, paleoecology, paleoenergetics, trophic transfer ef ciency, taphonomy.Eric N. Powell [eric@hsrl.rutgers.edu], Haskin Shell sh Research Laboratory, Rutgers University, 6959 Miller Ave.,

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Mass mortality of a HoloceneTagelus plebeius (Mollusca, Bivalvia) population in the Bahía Blanca Estuary, Argentina

Cited by 28 publications

References 5 publications

Population biology and secondary production of the stout razor clam Tagelus plebeius (Bivalvia, Solecurtidae) on a sandflat in southeastern Brazil

Population biology and secondary production of the stout razor clam Tagelus plebeius (Bivalvia, Solecurtidae) on a sandflat in southeastern Brazil

Submarine evidence of Holocene sea-level fluctuations in the Bahía Blanca estuary, Argentina

Application of trophic transfer efficiency and age structure in the trophic analysis of fossil assemblages

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