Extraguild prey availability reduced cannibalism and reciprocal intraguild predation of Neoseiulus barkeri (Acari: Phytoseiidae) and Scolothrips takahashii (Thysanoptera: Thripidae)

Cannibalism and intraguild predation (IGP) are two common interactions occurs in animal kingdom which influence their population structure and dynamics. Neoseiulus barkeri (Hughes) and Scolothrips takahashii (Priesner) are important natural enemies of citrus red mite Panonychus citri (McGregor). However, little was known about their interactions and how the availability of extraguild (EG) prey P. citri modulated their interactions. In this study, we determined incidences of cannibalism and intraguild predation of these two predators when different densities of extraguild prey P. citri were available. Our results showed that incidences of both cannibalism and IGP and were significantly reduced in the presence of the extraguild prey. The intraguild predation between N. barkeri and S. takahashii was bidirectional, but N. barkeri was a predominant intraguild predator over S. takahashii. The S. takahashii fed on immobile N. barkeri egg, and N. barkeri fed on inactive prepupa and pupa of S. takahashii, but the conspecifics seldom did. Our results indicated that the interactions of predators decreased significantly when prey was available. The predatory mite N. barkeri was a stronger interspecific competitor. The results of this study may be useful in developing effective biological control strategies against P. citri.

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Evaluation of a philic egg-consumption predatory thrips Scolothrips takahashii for control of the citrus red mite Panonychus citri

Crop Protection ◽

10.1016/j.cropro.2020.105421 ◽

2021 ◽

Vol 140 ◽

pp. 105421

Author(s):

Ya-Ying Li ◽

Ming-Xiu Liu ◽

Jin-Ge Yuan ◽

Tochukwu Tobias Okonkwo ◽

Han-Qiu Chen ◽

...

Keyword(s):

Panonychus Citri ◽

Citrus Red Mite ◽

Egg Consumption ◽

Scolothrips Takahashii

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Relationship between sensitization to citrus red mite (Panonychus citri ) and the prevalence of atopic diseases in adolescents living near citrus orchards

Clinical & Experimental Allergy ◽

10.1046/j.1365-2222.2002.01431.x ◽

2002 ◽

Vol 32 (7) ◽

pp. 1054-1058 ◽

Cited By ~ 15

Author(s):

S. -H. Kim ◽

Y. -K. Kim ◽

M. -H. Lee ◽

S. -C. Hong ◽

J. -M. Bae ◽

...

Keyword(s):

Atopic Diseases ◽

Panonychus Citri ◽

Citrus Red Mite ◽

Citrus Orchards

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Population structure and dynamics of the freshwater shrimp Atyaephyra desmarestii (Millet, 1831) in the lower River Minho (NW Portugal)

Crustaceana ◽

10.1163/15685403-00003442 ◽

2015 ◽

Vol 88 (6) ◽

pp. 657-673 ◽

Cited By ~ 1

Author(s):

Maria L. Fidalgo ◽

Paulo Santos ◽

Cláudia Ferreira ◽

Andreia Silva

Keyword(s):

Water Quality ◽

Reproductive Period ◽

Specific Knowledge ◽

Nw Portugal ◽

Ecological Relevance ◽

Structure And Dynamics ◽

Population Structure And Dynamics ◽

Autumn And Winter ◽

The Relationship ◽

Fast Increase

This paper reports population dynamics, growth, and reproductive features ofAtyaephyra desmarestii(Millet, 1831) from the estuary of the River Minho. Also, data were compared to information available from its distribution range. Samples were taken monthly between October 2010 and September 2011. Males were less abundant and smaller than females. The growth pattern showed hardly any increase during the autumn and winter, but a fast increase in size was recorded in spring, followed by slower growth in summer. The life span was 11-12 months. The reproductive period was from April to August, and mean fecundity reached 643 ± 254 eggs/female. Juveniles started to appear in July and a strong recruitment occurred in summer and autumn. The ecological relevance of the shrimp supports the need of obtaining further and more specific knowledge on the relationship between geographical distribution and water quality. Our results coupled with longer time series in different localities will be essential to the conservation of the species.

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Social and genetic analysis of a population of free-living cats (Felis catus L.) exploiting a resource-rich habitat

Wildlife Research ◽

10.1071/wr02092 ◽

2002 ◽

Vol 29 (4) ◽

pp. 405 ◽

Cited By ~ 27

Author(s):

Elizabeth Denny ◽

Paul Yakovlevich ◽

Mark D. B. Eldridge ◽

Chris Dickman

Keyword(s):

Waste Disposal ◽

Ad Hoc ◽

Survival Rates ◽

Felis Catus ◽

Male Dominance ◽

Disposal Site ◽

Free Living ◽

Structure And Dynamics ◽

Population Structure And Dynamics ◽

Rural Australia

Free-living cats (Felis catus L.) exploiting a waste-disposal site in rural Australia were studied for two years to investigate population structure and dynamics, and the relatedness of constituent individuals. The density of the population was equivalent to 700–750 cats km–2, the sex ratio was heavily skewed towards males, breeding occurred from July to April, and kitten survival rates were low. A combination of observational data, biometrics and microsatellite loci analyses was used to assess the relatedness of individuals in the population; these methods yielded highly congruent results. Thus, a female kin-group of three was identified, there was no female immigration, the average relatedness amongst the population was high and there was no indication of male dominance. The results indicate that cats at the site formed a tightly structured group, rather than an ad hoc collection of individuals. The stable, resource-rich habitat of waste-disposal sites may generally support high densities of group-forming cats in rural Australia, and pose broad-scale but previously unrecognised problems for effective management of free-living cats.

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Panonychus citri. [Distribution map].

Distribution Maps of Plant Pests ◽

10.1079/dmpp/20056600192 ◽

1964 ◽

Author(s):

Keyword(s):

South Africa ◽

New Zealand ◽

Central America ◽

West Indies ◽

Pacific Islands ◽

Distribution Map ◽

Panonychus Citri ◽

Citrus Red Mite ◽

New Distribution ◽

Distribution In Europe

Abstract A new distribution map is provided for Panonychus citri (McG.) (Acarina, Tetranychidae) (Citrus Red Mite). Hosts: Citrus spp., deciduous fruits, ornamentals, etc. Information is given on the geographical distribution in EUROPE (excl. USSR), Yugoslavia, ASIA (excl. USSR), Ceylon, China, India, Iran, Japan, Lebanon, Turkey, Vietnam, USSR, AFRICA, Republic of South Africa, Tunisia, AUSTRALASIA, and PACIFIC ISLANDS, Australia, Hawaii, New Zealand, NORTH AMERICA, U.S.A., CENTRAL AMERICA and WEST INDIES, West Indies, SOUTH AMERICA, Argentina, Brazil, Chile, Colombia, Peru.

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Structure and dynamics of a Cariniana estrellensis (Lecythidaceae) population in a fragment of Atlantic Forest in Minas Gerais, Brazil

Rodriguésia ◽

10.1590/s2175-78602012000200002 ◽

2012 ◽

Vol 63 (2) ◽

pp. 257-267 ◽

Cited By ~ 3

Author(s):

Yule Roberta Ferreira Nunes ◽

Miguel Petrere Jr.

Keyword(s):

Population Structure ◽

Seed Production ◽

Size Structure ◽

Canopy Cover ◽

High Rate ◽

Structure And Dynamics ◽

Seedling Bank ◽

Phase Size ◽

Population Structure And Dynamics ◽

Establishment Phase

We aimed to describe population structure and dynamics of Cariniana estrellensis (Raddi) Kuntze to test the hypothesis that this species survives in the forest by forming a seedling bank. We evaluated seed germination, spatial distribution, and recruitment, growth and mortality rates of young individuals. To characterize population structure a 1.2-ha plot was defined, where reproductive adults were mapped; also 100 6 m² sub-plots were established to characterize structure and monitor dynamics of young individuals. We estimated seed production using seed collectors and determined the percentage of canopy cover by hemispherical photographs. Seed rain and saplings showed clustered distribution indicating habitat-patch formation. Sapling mortality occurred mainly during the initial establishment phase. Size structure was characterized by many saplings (X = 9,763 individuals ha-1) and few adults (X = 5 individuals ha-1), associated with a high rate of seed production (X = 60,800 seeds ha-1), low growth rates (X = 2.37 cm ano-1) and mortality (15.66%) of established saplings, showing that species invest in seedling bank formation as a reproductive strategy.

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