scholarly journals Influence of prey availability on seasonal fluctuation in body condition in the wolf spider, Pardosa milvina (Araneae: Lycosidae)

2013 ◽  
Vol 41 (3) ◽  
pp. 400 ◽  
Author(s):  
Jason M. Schmidt ◽  
James D. Harwood ◽  
Ann L. Rypstra
Keyword(s):  
Body Condition ◽  
Prey Availability ◽  
Seasonal Fluctuation ◽  
Wolf Spider ◽  
Pardosa Milvina

scholarly journals Survival of the fattest: linking body condition to prey availability and survivorship of killer whales

Ecosphere ◽  
2021 ◽  
Vol 12 (8) ◽  
Author(s):  
Joshua D. Stewart ◽  
John W. Durban ◽  
Holly Fearnbach ◽  
Lance G. Barrett‐Lennard ◽  
Paige K. Casler ◽  
...  
Keyword(s):  
Body Condition ◽  
Prey Availability ◽  
Killer Whales

scholarly journals THE EFFECTS OF MOISTURE AND HEAT ON THE EFFICACY OF CHEMICAL CUES USED IN PREDATOR DETECTION BY THE WOLF SPIDER PARDOSA MILVINA (ARANEAE, LYCOSIDAE)

2005 ◽  
Vol 33 (3) ◽  
pp. 857-861 ◽  
Author(s):  
Shawn M. Wilder ◽  
Jill DeVito ◽  
Matthew H. Persons ◽  
Ann L. Rypstra
Keyword(s):  
Chemical Cues ◽  
Wolf Spider ◽  
Predator Detection ◽  
Pardosa Milvina

Morphometric discrimination of pelagic fish stocks challenged by variation in body condition

2017 ◽  
Vol 75 (2) ◽  
pp. 711-718
Author(s):  
George Geladakis ◽  
Nikolaos Nikolioudakis ◽  
George Koumoundouros ◽  
Stylianos Somarakis
Keyword(s):  
Body Condition ◽  
Prey Availability ◽  
Eastern Mediterranean ◽  
Morphological Differentiation ◽  
Shape Variation ◽  
Geometric Morphometric ◽  
Morphometric Characters ◽  
Mesozooplankton Biomass ◽  
Stock Discrimination ◽  
Principal Coordinates

Abstract Morphometric characters have traditionally been used to describe the population structure of fishes. Body shape variation, which is often environmentally induced, may provide a good record of short-term population structuring. However, factors unrelated to environmental or genetic influences on body morphology may complicate sampling and the use of morphometric features for stock discrimination. In the present study, we used geometric morphometric variables to compare the European sardine Sardina pilchardus putative stocks of the Aegean and Ionian Seas (eastern Mediterranean). Landmark data of fish collected at seven different sites were subjected to canonical analysis of principal coordinates (CAP). The average body condition of sardines from these sites was strongly and linearly related to corresponding scores along CAP1, the axis exhibiting the highest correlation with the morphometric data cloud. The average scores along CAP2 and CAP3 appeared to be linked to morphological differentiation related to temperature effects and prey availability (mesozooplankton biomass). Despite the primary and confounding effect of body condition, discrimination of different morphotypes corresponding to the Aegean and the Ionian Sea stocks was highly significant with 81% correct reallocations for the respective CAP model.

The effects of overwintering and habitat type on body condition and locomotion of the wolf spider Pardosa alacris

2018 ◽  
Vol 89 ◽  
pp. 38-42 ◽  
Author(s):  
Kapilkumar Ingle ◽  
Ádám Horváth ◽  
Nikolett Gallé-Szpisjak ◽  
Levente Gellért ◽  
Enikő Csata ◽  
...  
Keyword(s):  
Body Condition ◽  
Habitat Type ◽  
Wolf Spider

The wolf spider Pardosa milvina detects predator threat level using only vibratory cues

Behaviour ◽  
2016 ◽  
Vol 153 (2) ◽  
pp. 159-173 ◽  
Author(s):  
Michael I. Sitvarin ◽  
Shira D. Gordon ◽  
George W. Uetz ◽  
Ann L. Rypstra
Keyword(s):  
Predation Risk ◽  
Wolf Spider ◽  
Multiple Modalities ◽  
Predator Cues ◽  
Pardosa Milvina ◽  
Threat Level ◽  
Predator Threat

Predators may inadvertently signal their presence and threat level by way of signals in multiple modalities. We used a spider, Pardosa milvina, known to respond adaptively to chemotactile predator cues (i.e., silk, faeces and other excreta) to evaluate whether it could also discriminate predation risk from isolated vibratory cues. Vibrations from its prey, conspecifics, and predators (Tigrosa helluo and Scarites quadriceps) were recorded and played back to Pardosa. In addition, we recorded predator vibrations with and without access to chemotactile cues from Pardosa, indicating the presence of prey. Pardosa did not appear to discriminate between vibrations from prey or conspecifics, but the response to predators depended on the presence of cues from Pardosa. Vibrations from predators with access to chemotactile cues from prey induced reductions in Pardosa activity. Predator cues typically occur in multiple modalities, but prey are capable of imperfectly evaluating predation risk using a limited subset of information.

scholarly journals The effects of predation risk on female silk deposition and male response to predator-cued conspecifics in the wolf spider, Pardosa milvina (Araneae: Lycosidae)

2010 ◽  
Vol 38 (3) ◽  
pp. 393-397 ◽  
Author(s):  
Alexander L. Sweger ◽  
Michael Marr ◽  
Adam Satteson ◽  
Ann L. Rypstra ◽  
Matthew H. Persons
Keyword(s):  
Predation Risk ◽  
Wolf Spider ◽  
Male Response ◽  
Pardosa Milvina

Impacts of leg loss and regeneration on body condition, growth, and development time in the wolf spider Schizocosa ocreata

2007 ◽  
Vol 85 (7) ◽  
pp. 823-831 ◽  
Author(s):  
K.M. Wrinn ◽  
G.W. Uetz
Keyword(s):  
Body Size ◽  
Body Condition ◽  
Growth And Development ◽  
Development Time ◽  
Wolf Spider ◽  
Limb Loss ◽  
Lower Body ◽  
Schizocosa Ocreata ◽  
Trade Offs ◽  
Subsequent Regeneration

Autotomy (self-amputation) of appendages and subsequent regeneration is common to many taxa. These processes are known to affect foraging abilities, growth, and development time in many taxa. However, little is known about their effects in arachnids. We addressed the effects of autotomy and regeneration on body condition, growth (size and mass), and development time (molt interval) for the wolf spider Schizocosa ocreata (Hentz, 1844) in the field and laboratory. Frequency of autotomy in the field was high (11%–19%). Field-caught individuals with missing or regenerating legs had significantly lower body size, mass, and condition. To test the effects of regeneration on size, mass, and molt interval in the laboratory, we induced autotomy of one or both forelegs. Spiders regenerating two legs had reduced molt intervals, were smaller, and weighed less than spiders that were intact or regenerating one leg. Field-caught spiders that had undergone autotomy and regeneration in the laboratory exhibited reduced size, mass, and molt interval. In contrast, laboratory-reared spiders exhibited increased molt intervals but no difference in mass after regeneration. These results reveal that limb loss via autotomy is common (but potentially costly) in S. ocreata, and that environmentally mediated trade-offs between growth and development time may occur during regeneration.

Sign in / Sign up

Export Citation Format

Share Document