The Reproductive Cycles of <i>Monodonta Lineata</i> and <i>Gibbula Umbilicalis</i> on the Coast of Mid-Wales

Garwood, P. R.; Kendall, Michael A.

doi:10.1017/s0025315400019470

Cited by 32 publications

(20 citation statements)

References 15 publications

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“…The presence of a phenological shift is supported by observations of earlier onset of gametogenesis in several rocky shore invertebrates (including G. umbilicalis) during the warmer spring temperatures observed in several recent years in northern Europe. Spawning events seem to be taking place two months earlier in spring in comparison with the summer spawning event observed in cooler years of the late 1960s and early 1980s (Underwood 1972, Garwood and Kendall 1985. Note: The r s values presented correspond to the 50th percentile of the 5000 bootstrapped estimations of the association between the differenced NAO indices and observed recruitment from the literature.…”

Section: Discussionmentioning

confidence: 96%

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Climate and Recruitment of Rocky Shore Intertidal Invertebrates in the Eastern North Atlantic

Broitman

Mieszkowska

Helmuth

et al. 2008

Ecology

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Abstract. Studies of the impacts of climate and climate change on biological systems often attempt to correlate ecological responses with basin-scale indices such as the North Atlantic Oscillation (NAO). However, such correlations, while useful for detecting long-term trends, are unable to provide a mechanism linking the physical environment and ecological processes. Here we evaluate the effects of the NAO on recruitment variability of rocky intertidal invertebrates in the North Atlantic examining two possible climate-related pathways. Using a highly conservative test we interpret associations with the NAO integrated over a season (three months) as an indicator of atmospheric effects on newly settled recruits (NAO3), and the effects of the NAO integrated over six months (NAO6) as an indicator of changes in ocean circulation affecting patterns of larval transport. Through an extensive literature survey we found 13 time series, restricted to southwest Ireland and Britain and comprising five species, that could be used for statistical analysis. Significant correlations with NAO3, our proxy for atmospheric effects, were observed in the south-central domain of our study region (southwest Ireland and south England). Significant correlations with NAO6, the proxy for ocean circulation effects, were detected on southwest Ireland. The associations were detected for three (two barnacles and a topshell) at two sites. These results suggest that the NAO can have effects on the recruitment of intertidal invertebrates through different pathways linked to climate and be distributed heterogeneously in space. Based on previous evidence and the sign and geographic location of significant correlations, we suggest that winter NAO effects are likely to occur as a result of effects on the survival of early life stages settling during spring or through changes in phenology. Our results argue that a combination of modeling and synthesis can be used to generate hypotheses regarding the effects of climate on recruitment and aid in the design of field-based tests of explicit ecological mechanisms.

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Section: Discussionmentioning

confidence: 96%

“…For topshells in Britain, early spring release of gametes results in veligers settling on the shore earlier in the summer (Garwood and Kendall 1985;M. A. Kendall, personal communication;N.…”

Section: Discussionmentioning

confidence: 99%

Climate and Recruitment of Rocky Shore Intertidal Invertebrates in the Eastern North Atlantic

Broitman

Mieszkowska

Helmuth

et al. 2008

Ecology

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“…commun. ), Bowman (1985), Garwood & Kendall(1985) and from papers in this volume by Bode Extension of the period of gonad activity overall or of the period of 'ripeness' does not necessarily mean that spawning is taking place over an equally extended time, either continuously or in short bursts. Spawning which occurs as synchronously as it does in Patella spp (Bowman, 1985) or Gibbula (Kendall, pers.…”

Section: Latitudinal Trends In the Molluscs: Gonad Cyclesmentioning

confidence: 99%

Latitudinal trends in reproduction, recruitment and population characteristics of some rocky littoral molluscs and cirripedes

Lewis¹

1986

Hydrobiologia

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This paper reviews progress in the COST 647 rocky littoral programme involving three patellids, two trochids and two cirripedes on European Atlantic coasts. Northern geographical limits are set primarily by repopulation failure, and northern populations are characterised by short, mid-summer breeding periods, high frequency of failed or poor recruitments and low density of large, long-lived individuals. Towards the south molluscan breeding periods lengthen and become later, extending in some cases throughout much of the year but with least or no activity in mid-summer. There are probably fewer recruitment failures and thus higher densities, but individuals are of smaller maximum size and shorter life-span.The cirripedes show similar latitudinal trends in recruitment timing but Semibalanus is restricted to a single annual brood throughout its range.The two species reaching their southern limits show progressive restriction to the lowest tidal levels. Recruitment failures do not result from inadequate gonad activity. They arise in cirripedes during the planktonic phase and in the molluscs during settlement and early shore life. The temperature sensitivity of molluscan spat is primarily responsible for the north/south gradient in recruitment times from summer towards winter.

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“…Although a great deal of biological information has been published about topshells, virtually no data are available about their behavior (Clarke, Kendall, & Gore, 1990;Daguzan, 1991;Garwood & Kendall, 1985;Little, Dicks, & Crothers, 1986;Underwood, 1973;Williamson & Kendall, 1981). We therefore designed an experiment to answer the following question : Is the topshell (Monodonta lineata) capable oflearning not to extend its foot for suction on a surface and then able to store this learned inhibition in long-term memory?…”

mentioning

confidence: 99%

Inhibitory learning and memory in the topshell (Monodonta lineata)

Angermeier

Benecke

Göhlen

et al. 1993

Bull. Psychon. Soc.

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One hundred eighty topshells (Monodonta lineata) were exposed to inhibitory learning procedures. Results indicate that (1) topshells are capable of inhibitory learning, (2) long-term memory for this type of learning persists for at least 32 days, and (3) topshells housed in groups of 10 learned more efficiently than did those housed in groups of 5. The latter groups, however, learned more efficiently than did animals housed singly. These results were interpreted in terms of the evolutionary significance of such behavior.

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The Reproductive Cycles of Monodonta Lineata and Gibbula Umbilicalis on the Coast of Mid-Wales

Cited by 32 publications

References 15 publications

Climate and Recruitment of Rocky Shore Intertidal Invertebrates in the Eastern North Atlantic

Climate and Recruitment of Rocky Shore Intertidal Invertebrates in the Eastern North Atlantic

Latitudinal trends in reproduction, recruitment and population characteristics of some rocky littoral molluscs and cirripedes

Inhibitory learning and memory in the topshell (Monodonta lineata)

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