Seasonal Abundance, Life History, and Parasitism of Caloptilia porphyretica (Lepidoptera: Gracillariidae), a Leafminer of Highbush Blueberry

2010 ◽  
Vol 103 (2) ◽  
pp. 284-291 ◽  
Author(s):  
James D. Barry ◽  
Cesar R. Rodriguez-Saona ◽  
Dean F. Polk ◽  
Aijun Zhang
Keyword(s):  
Life History ◽  
Seasonal Abundance ◽  
Highbush Blueberry

scholarly journals Conservation of coastal stingrays: seasonal abundance and population structure of the short-tailed stingray Dasyatis brevicaudata at a Marine Protected Area

2012 ◽  
Vol 69 (8) ◽  
pp. 1427-1435 ◽  
Author(s):  
A. Le Port ◽  
S. Lavery ◽  
J. C. Montgomery
Keyword(s):  
Population Structure ◽  
Life History ◽  
Protected Area ◽  
Marine Protected Area ◽  
Marine Reserve ◽  
Conservation Strategy ◽  
Seasonal Abundance ◽  
Management Tools ◽  
Life History Stages ◽  
Effective Conservation

Abstract Le Port, A., Lavery, S., and Montgomery, J. C. 2012. Conservation of coastal stingrays: seasonal abundance and population structure of the short-tailed stingray Dasyatis brevicaudata at a Marine Protected Area. – ICES Journal of Marine Science, 69: . Elasmobranch (shark, ray, and skate) populations around the world are in decline, and effective conservation measures are urgently needed. Marine Protected Areas (MPA) placed in locations important for key life-history stages may form part of an effective conservation strategy. In this context, we examined the seasonal abundance and population structure of the short-tailed stingray (Dasyatis brevicaudata) at an offshore MPA in northeastern New Zealand, and the reported use of this location as a mating ground. Diver surveys were conducted from 2004 to 2007 at the Poor Knights Islands Marine Reserve (PKIMR). During this time, we observed: (i) a substantial increase in adult and subadult numbers, particularly females during the suggested breeding season, and a corresponding increase in females bearing fresh mating scars; and (ii) large numbers of smaller (probably immature) D. brevicaudata individuals of both sexes from spring to autumn. These results suggest that the PKIMR acts as both a mating aggregation location and a nursery for this species. We suggest that for coastal stingrays such as D. brevicaudata, small MPAs may be effective at protecting key life-history stages, but that as movements outside of reserve boundaries also occur, additional management tools may also be necessary.

Temporal Distribution, Biology and Life History of the Cotton Tipworm, Crocidosema Plebiana Zeller, on Cotton in the South-Eastern Queensland Region.

1978 ◽  
Vol 26 (1) ◽  
pp. 147 ◽  
Author(s):  
AL Bishop ◽  
PRB Blood
Keyword(s):  
Life History ◽  
Temporal Distribution ◽  
Seasonal Abundance ◽  
The South ◽  
South Eastern ◽  
History Of

Data are presented from a three-season study of the seasonal abundance, biology and life history of C. plebeiana, which affects cotton during its establishment and early fruiting phases in the south-east Queensland region. Results suggest that if insecticidal control of tipworm is necessary it should be initiated during the egg stage.

Seasonal dynamics of three coexisting aphid species: implications for estimating population variability

2013 ◽  
Vol 145 (3) ◽  
pp. 283-291 ◽  
Author(s):  
Robert J. Lamb ◽  
Patricia A. MacKay ◽  
Andrei Alyokhin
Keyword(s):  
Life History ◽  
Early Stage ◽  
Aphid Species ◽  
Population Variability ◽  
Macrosiphum Euphorbiae ◽  
Seasonal Abundance ◽  
Seasonal Patterns ◽  
Annual Peak ◽  
Aphis Nasturtii ◽  
Peak Abundance

AbstractSeasonal patterns of abundance and population variability were determined for Macrosiphum euphorbiae (Thomas), Myzus persicae (Sulzer), and Aphis nasturtii (Kaltenbach) (Hemiptera: Aphididae) in potato plots from weekly samples for 28 years. All species showed a single annual peak, but arrived and reached peak abundance at different times. Population variability (PV, a proportion between 0 and 1) for the week of peak abundance was close to that of other sample weeks and mean seasonal abundance. Based on mid-season abundance, PV of 0.76 for M. persicae differed significantly from 0.80 for A. nasturtii, as well as from 0.59 for M. euphorbiae. A weekly time scale for abundance, initiated at an early stage of plant growth, produced slightly different estimates of PV early and late in the season than a scale centred on peak abundance for each species. PV at the time of invasion differed from estimates for the rest of the summer. The annual abundance used to estimate PV was best determined in the context of aphid life history. Nevertheless, PV provided a robust and precise metric for comparing population variability among the three species, regardless of their seasonal patterns of abundance.

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