Corrigendum to: Temporal patterns of gastropod egg mass deposition on southeastern Australian shores

2008 ◽  
Vol 59 (7) ◽  
pp. 652
Author(s):  
Rachel Przeslawski
Keyword(s):  
Environmental Stress ◽  
Food Availability ◽  
Temporal Patterns ◽  
Rocky Intertidal ◽  
Egg Mass ◽  
Larval Food ◽  
Intrinsic Factors ◽  
Developmental Mode ◽  
Eastern Australia ◽  
Taxonomic Order

Spawning of marine invertebrates may be affected by environmental factors (e.g. food availability, environmental stress) or intrinsic factors (e.g. phylogenetic constraints, developmental mode); intrinsic factors may obscure environmental effects. Two-year surveys of gastropod egg mass deposition were conducted at two rocky intertidal sites in south-eastern Australia to test the following hypotheses: (1) temporal patterns of spawning are more similar within taxonomic order than across orders; and (2) species with planktotrophic larvae are more likely to spawn in seasons coinciding with maximum food availability. There were no discernible effects of either order or developmental mode on spawning patterns, suggesting that spawning behaviour is unrelated to taxonomic order or larval food availability. Alternatively, low numbers of species in certain groups may have increased the risk of not detecting significant effects (type II error). Comparisons with anecdotal data from other regions suggest that developmental mode may indeed play a role in marine gastropod spawning. Criteria are provided for future comparative studies, including a direct focus on specific families and the inclusion of similar latitudes and habitats to those used here. Such studies will help to determine the roles of developmental mode, food availability and environmental stress in the evolution of egg mass deposition.

Temporal patterns of gastropod egg mass deposition on southeastern Australian shores

2008 ◽  
Vol 59 (6) ◽  
pp. 457 ◽  
Author(s):  
Rachel Przeslawski
Keyword(s):  
Environmental Stress ◽  
Food Availability ◽  
Temporal Patterns ◽  
Rocky Intertidal ◽  
Egg Mass ◽  
Larval Food ◽  
Intrinsic Factors ◽  
Developmental Mode ◽  
Eastern Australia ◽  
Taxonomic Order

Spawning of marine invertebrates may be affected by environmental factors (e.g. food availability, environmental stress) or intrinsic factors (e.g. phylogenetic constraints, developmental mode); intrinsic factors may obscure environmental effects. Two-year surveys of gastropod egg mass deposition were conducted at two rocky intertidal sites in south-eastern Australia to test the following hypotheses: (1) temporal patterns of spawning are more similar within taxonomic order than across orders; and (2) species with planktotrophic larvae are more likely to spawn in seasons coinciding with maximum food availability. There were no discernible effects of either order or developmental mode on spawning patterns, suggesting that spawning behaviour is unrelated to taxonomic order or larval food availability. Alternatively, low numbers of species in certain groups may have increased the risk of not detecting significant effects (type II error). Comparisons with anecdotal data from other regions suggest that developmental mode may indeed play a role in marine gastropod spawning. Criteria are provided for future comparative studies, including a direct focus on specific families and the inclusion of similar latitudes and habitats to those used here. Such studies will help to determine the roles of developmental mode, food availability and environmental stress in the evolution of egg mass deposition.

Marine and estuarine phylogeography of the coasts of south-eastern Australia

2016 ◽  
Vol 67 (11) ◽  
pp. 1597 ◽  
Author(s):  
D. J. Colgan
Keyword(s):  
South Australia ◽  
Rocky Intertidal ◽  
Phylogeographic Structure ◽  
Subtidal Zone ◽  
South Eastern ◽  
South Wales ◽  
Eastern Australia ◽  
North Eastern ◽  
Genetic Techniques ◽  
South Eastern Australia

Understanding a region’s phylogeography is essential for an evolutionary perspective on its biological conservation. This review examines the phylogeographic structures in south-eastern Australia that have been revealed by mitochondrial DNA sequencing and other genetic techniques and examines whether they can be explained by known factors. The review covers species that occur in the intertidal zone or, even infrequently, in the shallow subtidal zone. The coasts most frequently associated with phylogeographic structure are the boundaries between the Peronian and Maugean biogeographical provinces in southern New South Wales and the Maugean and Flindersian provinces in South Australia, the areas in Victoria and north-eastern Tasmania separated by the Bassian Isthmus at glacial maxima, long sandy stretches without rocky intertidal habitat on the Ninety Mile Beach in Victoria and the Younghusband Peninsula–Coorong in South Australia, southern Tasmania and Bass Strait, which acts as a barrier for littoral species.

Factors supporting the non-persistence of fruit fly populations in South Australia

2004 ◽  
Vol 44 (1) ◽  
pp. 109 ◽  
Author(s):  
D. A. Maelzer ◽  
P. T. Bailey ◽  
N. Perepelicia
Keyword(s):  
Alternative Hypothesis ◽  
South Australia ◽  
Fruit Fly ◽  
Fruit Flies ◽  
Larval Food ◽  
Introduction Pathways ◽  
Spring Generation ◽  
Eastern Australia ◽  
Conventional Technology ◽  
Genetic Techniques

For purposes of interstate and international fruit trade, it is necessary to demonstrate that in areas in which fruit fly species have not previously established permanent populations, but which are subject to introductions of fruit flies from outside the area, the introduced population once detected, has not become established. In this paper, we apply methodology suggested mainly by Carey (1991, 1995) to introductions of Mediterranean fruit fly (Medfly), Ceratitis capitata Weid., and Queensland fruit fly (QFF) Bactrocera tryoni Froggatt (Diptera: Tephritidae) to South Australia, a state in which these species do not occur naturally and in which introductions, once detected, are actively treated. By analysing historical data associated with fruit fly outbreaks in South Australia, we demonstrate that: (i) fruit flies occur seasonally, as would occur in established populations, except there is no evidence of the critical spring generation of either species; (ii) there is no evidence of increasing frequency of outbreaks, trapped flies or larval occurrences over 29 years; (iii) there is no evidence of decreasing time between catches of adult flies as the years progress; (iv) there is no decrease in the mean number of years between outbreaks in the same locations; (v) there is no statistically significant recurrence of outbreaks in the same locations in successive years; (vi) there is no evidence of spread of outbreaks outwards from a central location; (vii) the likelihood of outbreaks in a city or town is related to the size of the human population; (viii) introduction pathways by road from Western Australia (for Medfly) and eastern Australia (for QFF) are shown to exist and to illegally or accidentally carry considerable amounts of fruit into South Australia; and (ix) there was no association between the numbers of either Queensland fruit fly or Medfly and the spatial pattern of either loquat or cumquat trees as sources of larval food in spring. This analysis supports the hypothesis that most fruit fly outbreaks in South Australia have been the result of separate introductions of infested fruit by vehicular traffic and that most of the resultant fly outbreaks were detected and died out within a few weeks of the application of eradication procedures. An alternative hypothesis, that populations of fruit flies are established in South Australia at below detectable levels, is impossible to disprove with conventional technology, but the likelihood of it being true is minimised by our analysis. Both hypotheses could be tested soon with newly developed genetic techniques.

scholarly journals Temporal patterns of crop-raiding by primates: linking food availability in croplands and adjacent forest

1998 ◽  
Vol 35 (4) ◽  
pp. 596-606 ◽  
Author(s):  
LISA NAUGHTON-TREVES ◽  
ADRIAN TREVES ◽  
COLIN CHAPMAN ◽  
RICHARD WRANGHAM
Keyword(s):  
Food Availability ◽  
Temporal Patterns ◽  
Crop Raiding

PHYSIOLOGY OF THE ROCKY INTERTIDAL PREDATORNUCELLA OSTRINAALONG AN ENVIRONMENTAL STRESS GRADIENT

Ecology ◽  
2001 ◽  
Vol 82 (10) ◽  
pp. 2816-2829 ◽  
Author(s):  
Elizabeth P. Dahlhoff ◽  
Bradley A. Buckley ◽  
Bruce A. Menge
Keyword(s):  
Environmental Stress ◽  
Stress Gradient ◽  
Rocky Intertidal

Egg size and egg mass of Daphnia magna: response to food availability

Hydrobiologia ◽  
1995 ◽  
Vol 307 (1-3) ◽  
pp. 139-145 ◽  
Author(s):  
Irana Trubetskova ◽  
Winfried Lampert
Keyword(s):  
Daphnia Magna ◽  
Food Availability ◽  
Egg Size ◽  
Egg Mass

Patterns of composition and abundance in macroinvertebrate egg masses from temperate Australian streams

2004 ◽  
Vol 55 (1) ◽  
pp. 39 ◽  
Author(s):  
P. Reich
Keyword(s):  
Water Surface ◽  
Egg Laying ◽  
Maximum Diameter ◽  
Egg Mass ◽  
Egg Masses ◽  
Eastern Australia ◽  
The Common ◽  
Substrate Size ◽  
High Degree ◽  
Sampling Times

Quantitative samples of lotic invertebrate egg masses were collected on two occasions from three riffles along two rivers within the Acheron River catchment, south-eastern Australia. Sampling was stratified to compare the abundance and composition of egg masses on submerged rocks with rocks that protruded above the water surface within each of three substrate size classes. The egg mass fauna of both rivers was found to be both species rich and abundant. Egg masses belonging to Diptera and Trichoptera represented the majority of material collected, with approximately 70% of all taxa common to both rivers. In particular, egg masses of Chironomidae, Hydrobiosidae, Hydroptilidae and Hydropsychidae dominated most samples numerically. Descriptions of the egg masses belonging to 17 taxa are provided, as well as preliminary estimates of hatching times and observations of egg-laying and post-hatching behaviour for some species. Large rocks (> 30 cm maximum diameter) that protruded above the water surface consistently yielded the highest number of egg masses for all common taxa. For common taxa, between 74% and 100% of all egg masses were found on large emergent rocks. Of the common taxa, little variation in egg mass abundance was detected between sampling times or between sites within each river. Exceptions were hydroptilids and chironomids, which were completely absent from some time/site combinations, suggesting a degree of synchrony in egg-laying behaviour. For all common taxa, the greatest source of variation in egg mass numbers appeared at the level of individual rocks, where a high degree of spatial aggregation was apparent (as described by Lloyd's index of patchiness).

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