Preliminary Study on the Ecology of Three Horizontal Orb Weavers, Tetragnatha Praedonia, T. Japonica, and T. Pinicola (Araneae: Tetragnathidae)

Yoshida, Makoto

doi:10.2476/asjaa.30.49

Cited by 13 publications

(3 citation statements)

References 10 publications

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“…2009). Tetragnatha spiders particularly prefer wet environments as habitats (Yoshida 1981), which seems to be reflected in the strong effect of precipitation. Some species of Tetragnatha also prefer woodland area to open land as habitats (Yoshida 1981) and it has been indicated that terrestrial detritus from the forest enhances the emergence of aquatic insect prey for spiders including Tetragnatha (Kato et al.…”

Section: Discussionmentioning

confidence: 99%

“…To investigate the effect of non‐crop habitats in surrounding landscapes, the area of forest surrounding the survey fields, which is often associated with the presence of Tetragnatha species (Yoshida 1981), was also used as an explanatory variable. The area of surrounding forest was obtained from the Precise Land‐Use, Land‐Cover Map created by the Japan Aerospace Exploration Agency in 2010 (http://www.eorc.jaxa.jp/ALOS/lulc/lulc_jindex.htm).…”

Section: Methodsmentioning

confidence: 99%

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A macro-scale perspective on within-farm management: how climate and topography alter the effect of farming practices

et al. 2011

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Organic farming has the potential to reverse biodiversity loss in farmland and benefit agriculture by enhancing ecosystem services. Although the mixed success of organic farming in enhancing biodiversity has been attributed to differences in taxa and landscape context, no studies have focused on the effect of macro-scale factors such as climate and topography. This study provides the first assessment of the impact of macro-scale factors on the effectiveness of within-farm management on biodiversity, using spiders in Japan as an example. A multilevel modelling approach revealed that reducing pesticide applications increases spider abundance, particularly in areas with high precipitation, which were also associated with high potential spider abundance. Using the model we identified areas throughout Japan that can potentially benefit from organic farming. The alteration of local habitat-abundance relations by macro-scale factors could explain the reported low spatial generality in the effects of organic farming and patterns of habitat association.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

A macro-scale perspective on within-farm management: how climate and topography alter the effect of farming practices

et al. 2011

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“…Tetragnatha praedonia (Tetragnathidae) is a habitat generalist (Shinkai & Takano 1984, 1987Yaginuma 1965Yaginuma , 1986) that is found in wet areas including ponds, marshes, streams (Shinkai & Takano 1984, 1987Yoshida 1981Yoshida , 2001, and paddy fields (Hamamura 1969;Okuma 1977), as well as in dry habitats including grasslands and gardens (Yoshida, unpublished data). This species sometimes constructs webs around outdoor lights and preys on insects that are attracted to such lights (Yoshida, personal observation).…”

Section: Introductionmentioning

confidence: 99%

Life history of Tetragnatha praedonia (Araneae: Tetragnathidae)

Yoshida

2002

Acta Arachnologica

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-The life history of a tetragnathid species, Tetragnatha praedonia was studied by both periodical field collectings and rearing spiders in the laboratory. Newly hatched spiderlings emerged repeatedly between June and September. Five spiders (two males and three females) were reared to adulthood. The developmental time from emergence to the adult molt was 57-59 days for males and 47-51 days for females. The repeated emergence of newly hatched spiderlings and the short life span suggest that T. praedonia has a turnover rate of a few generations per year.

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Space partitioning among the wolf spider Pardosa amentata species group in Hokkaido, Japan

Suwa

1986

Population Ecology

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Summary There are 4 species belonging to the wolf spider Pardosa amentata species group in Hokkaido. The 4 species have separately occurred in Hokkaido in general, but a few species have sometimes occurred together at the same sites. Their biology at the coexisting sites, with special reference to partitioning of space was studied. P. agraria mainly inhabited fields and occurred widely in Hokkaido. P. hokkaido, P. brebivulva and P. lugubris inhabited the vicinity of forests and occurred in southern Hokkaido and on the side of the Sea of Japan in Hokkaido, all over Hokkaido excent the side of the Sea of Japan in central Hokkaido, and the lowlands and highlands in northern and eastern Hokkaido and mainly the highlands in other regions, respectively. In eastern Hokkaido where P. brevivulva and P. lugubris have coexisted, as the number of spiders detected and the number of localities of the former were less than those of the latter, it was concluded that the former occurred mainly in southern Hokkaido and the Hidaka region. In southern Hokkaido where P. hokkaido and P. brevivulva have coexisted, few individuals of both species were collected together at the same sites, and they were distributed allotopically. In short, the partitioning of space among the P. amentata species group occurring in Hokkaido was clear. From investigations on the coexisting sites and some other reports, it was considered that food, life cycle and diel activity periodicity among Pardosa occurring in Hokkaido were similar to one another. This may be one of the causes of the clear space partitioning among Pardosa. Since Pardosa is a raptorial predator that does not weave but wanders on the ground and uses space horizontally, available prey resource for Pardosa would be limited. It was therefore conjectured that the spider would be prone to space segregation, even if the spider could segregate the other niche dimensions. The partitioning of space between P. agraria and P. hokkaido inhabiting distinct habitats was loose when it was compared with that between species inhabiting similar habitats. As most of the spiders observed in the overlapping areas were females with egg cocoons, which required little food, the reduced feeding was considered to have allowed the loose partitioning.

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Preliminary Study on the Ecology of Three Horizontal Orb Weavers, Tetragnatha Praedonia, T. Japonica, and T. Pinicola (Araneae: Tetragnathidae)

Cited by 13 publications

References 10 publications

A macro-scale perspective on within-farm management: how climate and topography alter the effect of farming practices

A macro-scale perspective on within-farm management: how climate and topography alter the effect of farming practices

Life history of Tetragnatha praedonia (Araneae: Tetragnathidae)

Space partitioning among the wolf spider Pardosa amentata species group in Hokkaido, Japan

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