Carabid fecundity as affected by extrinsic and intrinsic factors

Grüm, Leszek

doi:10.1007/bf00384473

Cited by 16 publications

(7 citation statements)

References 12 publications

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“…Our results concerning the three autumn breeding species agree with those of GrÜm (1984) and Huk and KÜhne (2000), who described a negative correlation between the mean number of ripe eggs in the ovaries and the body mass of the species. This did not apply to C. convexus.…”

Section: Discussionsupporting

confidence: 92%

Seasonal dynamics, age structure and reproduction of four Carabus species (Coleoptera: Carabidae) living in forested landscapes in Hungary

Kádár¹,

Fazekas²,

Gábor³

2015

Acta Zool Acad Sci H

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Seasonal dynamics and reproductive phenological parameters of four Carabus species (C. convexus, C. coriaceus, C. germarii and C. hortensis) common in Hungary were studied by pitfall trapping and dissection. Beetles were collected in an abandoned apple orchard and in the bordering oak forest near Budapest (Central Hungary), in 1988-1991.The sex ratio was male-dominated, but this was significant only for C. coriaceus.The catch of C. germarii adults showed relatively short activity period with unimodal curve, but activity was longer and bimodal for the other three species. Adults of C. germarii and C. hortensis reached sexual maturity in July, and C. coriaceus adults were matured by early August. We did not find newly hatched individuals of C. coriaceus or C. germarii.The reproductive period was approximately four weeks in C. hortensis, five weeks for C. coriaceus and six weeks for C. germarii. Reproduction lasted much longer, for about four months, in C. convexus. The mean number of ripe eggs per female were 4.2 in C. convexus, 5.4 in C. coriaceus, 6.6 in C. germarii, and 7.4 in C. hortensis. The maximum number found was about three times the average in all studied species. The reproductive allocation (ratio of egg complement mass/body mass) was lowest in C. germarii (0.133) and highest in C. hortensis (0.196), and did not depend on body size.There was minimal overlap of the activity and reproductive periods of the four species.

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Section: Discussionsupporting

confidence: 92%

Seasonal dynamics, age structure and reproduction of four Carabus species (Coleoptera: Carabidae) living in forested landscapes in Hungary

Kádár¹,

Fazekas²,

Gábor³

2015

Acta Zool Acad Sci H

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“…But why do larger carabid species show a lower rate of population increase than smaller species? As with other organisms, egg numbers tend to decrease as body mass increases (Grüm 1984;Lövei and Sunderland 1996;Huk and Kühne 2000), although findings vary considerably (Thiele 1977). However larval mortality is considered to be the key factor for adult fluctuations (Den Boer 1986).…”

Section: Carabid Body Sizementioning

confidence: 94%

Species decline—but why? Explanations of carabid beetle (Coleoptera, Carabidae) declines in Europe

2003

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We investigated some of the causes of ground beetle decline using atlas data from Belgium, Denmark and the Netherlands, countries in which natural environments have all but disappeared. We used ordinal regression to identify characteristics that are significantly correlated with the decline of carabid beetle species over the last 50-100 years, using a stepwise selection procedure to select the optimal model according to the Akaike Information Criterion. The results showed that large-bodied carabid populations have declined more than smaller ones, possibly because of their lower reproductive output and lower powers of dispersal. Habitat specialist populations (i.e. species with small niche breadths) have also decreased more than habitat generalist populations. Species with both long- and short-winged individuals have been less prone to decline than those that are exclusively either short-winged or long-winged. Dimorphic species may survive better in highly altered environments because long-winged individuals are good at dispersing between suitable habitats and short-winged individuals are good at surviving and reproducing in these newly colonised habitats. Finally, populations of large carabids associated with coastal, woodland or riparian habitat types were less prone to decline than populations of large carabids associated with various, open or grassland habitat types. The pattern is reversed for carabid species smaller than 8 mm in size. These results are explained in the context of habitat restoration and destruction in these highly modified western European countries.

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“…Hakusan [54], 83% (19 of 23 species) were brachypterous or apterous in our study ( Figure 5(b)). The growing literature from lowland areas suggests that stable habitats, such as large forested areas, are generally represented by brachypterous or apterous carabid beetle species [21,44,45,57], whereas fragmented habitats, such as small patches of forest following deforestation, are generally represented by macropterous carabid species [45,57,58]. Herbaceous vegetation in high-altitude areas is usually in a stable, climax condition [59]; therefore, the carabid beetles living there may not need to move long distances.…”

Section: Characteristics Of Carabid Beetle Assemblages In Thementioning

confidence: 99%

Assemblage Characteristics and Habitat Specificity of Carabid Beetles in a Japanese Alpine-Subalpine Zone

Hiramatsu

Usio

2018

Psyche: A Journal of Entomology

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In lowland areas of the world and high-altitude European mountains, the species compositions, body sizes, and wing forms of carabid beetles are known to change according to vegetation structures. However, little is known regarding the assemblage structure and habitat associations of carabid beetles in Japanese alpine-subalpine areas. We surveyed carabid beetles in four habitats (snow beds, alpine meadows, Pinus scrub, and fell-fields) in the alpine-subalpine zone on Mt. Hakusan, Japan. We surveyed carabid beetles six times between mid-July and late September. Nonmetric multidimensional scaling (NMDS) and analysis of similarities (ANOSIM) revealed three distinct carabid beetle assemblages in snow beds and alpine meadows, Pinus scrub, and fell-fields. The carabid beetle assemblages in the four habitats consisted predominantly of small and/or wingless species with differential spatiotemporal variability in abundance. Biota-environment (BIO-ENV) analyses showed that the percentage coverage by Pinus scrub, soil water content, and ground surface temperature were among the most significant variables affecting carabid beetle compositions. Given their small sizes and reduced wings, which are characteristic traits for limited mobility, and high-level habitat specificity, carabid beetles in the alpine-subalpine zone may serve as an important target group to monitor the impacts of global environmental change on mountain ecosystems.

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Carabid fecundity as affected by extrinsic and intrinsic factors

Cited by 16 publications

References 12 publications

Seasonal dynamics, age structure and reproduction of four Carabus species (Coleoptera: Carabidae) living in forested landscapes in Hungary

Seasonal dynamics, age structure and reproduction of four Carabus species (Coleoptera: Carabidae) living in forested landscapes in Hungary

Species decline—but why? Explanations of carabid beetle (Coleoptera, Carabidae) declines in Europe

Assemblage Characteristics and Habitat Specificity of Carabid Beetles in a Japanese Alpine-Subalpine Zone

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