The relative roles of body size and feeding type on activity time of temperate ruminants

Oecologia ◽  
1998 ◽  
Vol 113 (3) ◽  
pp. 442-446 ◽  
Author(s):  
Atle Mysterud
Keyword(s):  
Body Size ◽  
Activity Time ◽  
Feeding Type

Biotic influences on species duration: interactions between traits in marine molluscs

Paleobiology ◽  
2010 ◽  
Vol 36 (2) ◽  
pp. 204-223 ◽  
Author(s):  
James S. Crampton ◽  
Roger A. Cooper ◽  
Alan G. Beu ◽  
Michael Foote ◽  
Bruce A. Marshall
Keyword(s):  
Body Size ◽  
Large Range ◽  
Geographic Range ◽  
Range Size ◽  
Biological Traits ◽  
Data Set ◽  
Marine Molluscs ◽  
Larval Type ◽  
Feeding Type ◽  
Life Mode

We analyze relationships among a range of ecological and biological traits—geographic range size, body size, life mode, larval type, and feeding type—in order to identify those traits that are associated significantly with species duration in New Zealand Cenozoic marine molluscs, during a time of background extinction. Using log-linear modeling, we find that bivalves have only a small number of simple, two-way associations between the studied traits and duration. In contrast, gastropods display more complex interactions involving three-way associations between traits, a pattern that suggests greater macroecological complexity of gastropods. This is not an artifact caused by the larger number of gastropods than bivalves in our data set. We used stratified randomized resampling of families to test for associations between traits that might result from shared inheritance rather than ecological trait interactions; we found no evidence of phylogenetic effects in any associations examined. The relationships revealed by our study should serve to constrain the range of possible biological mechanisms that underlie these relationships. As previously observed, two-way associations are present between large geographic range and increased duration, and between large geographic range and large body size, in both bivalves and gastropods. In gastropods, planktotrophic larval type is associated with large range size through a three-way interaction that also involves duration; there is no direct association of larval type and geographic range. Gastropods also display two-way associations between duration and life mode, and duration and feeding type. We note that in gastropods, an infaunal life mode is associated with large range size, whereas in bivalves infaunality is associated with reduced range size.

Community Trophic Structure: The Roles of Diet, Body Size, and Activity Time in Vertebrate Predators

Oikos ◽  
1993 ◽  
Vol 67 (1) ◽  
pp. 6 ◽  
Author(s):  
Carl D. Marti ◽  
Karen Steenhof ◽  
Michael N. Kochert ◽  
Jeffrey S. Marks
Keyword(s):  
Body Size ◽  
Trophic Structure ◽  
Activity Time ◽  
Vertebrate Predators

scholarly journals Marine Species Traits in the LifeWatch Taxonomic Backbone

2019 ◽  
Vol 3 ◽  
Author(s):  
Stefanie Dekeyzer ◽  
Wim Decock ◽  
Kevin Verfaille ◽  
Bart Vanhoorne ◽  
Thomas Lanssens ◽  
...  
Keyword(s):  
Information System ◽  
Body Size ◽  
Marine Species ◽  
Species Traits ◽  
Red List ◽  
Biological Information ◽  
Ecological Traits ◽  
Size Information ◽  
Feeding Type ◽  
Red List Species

Describing species patterns and their underlying processes are essential to assessing the status and future evolution of marine ecosystems. This effort requires biological information on functional and structural species traits, such as feeding ecology, body size, reproduction, and life history. Basic trait information was already available within the World Register of Marine Species (WoRMS), for a limited number of taxa: Biological and ecological traits (e.g., body size, feeding type) Taxonomic traits (e.g., paraphyletic groups) Human-defined traits (e.g., Red List species) Biological and ecological traits (e.g., body size, feeding type) Taxonomic traits (e.g., paraphyletic groups) Human-defined traits (e.g., Red List species) Within the EMODnet Biology project and the LifeWatch Taxonomic Backbone, this initiative was taken one step further, and ten traits were prioritized to document: taxonomy, environment, geography, depth, body size, substratum, mobility, skeleton, diet, and reproduction. Criteria for selecting these traits were: applicability to most taxa, easy availability, and the fact that their inclusion would result in new research and/or management applications. Taxonomy- and environment-related information are available within WoRMS, whereas geography data are available through the Ocean Biogeographic Information System (OBIS). During 2018, the skeleton information was added to WoRMS. Currently, almost 4,000 accepted marine species have information regarding their supporting structure, enclosures, and composition. Body size information wascollected for distinct (taxonomic) groups, which resulted in more than 6,000 accepted marine species having quantitative body size information included in WoRMS. An ongoing traits data mining exercise is combining body size with benthos-plankton information, extracted both from WoRMS and the European Ocean Biogeographic Information System (EurOBIS), to assign functional groups such as macrobenthos, microplankton, etc. to the taxa in WoRMS. All trait information collected in WoRMS is made available through a dedicated thematic traits portal.

The relative roles of phylogeny, body size and feeding style on the activity time of temperate ruminants: a reanalysis

Oecologia ◽  
1999 ◽  
Vol 120 (2) ◽  
pp. 193-197 ◽  
Author(s):  
F. Javier Pérez-Barbería ◽  
Iain J. Gordon
Keyword(s):  
Body Size ◽  
Activity Time ◽  
Feeding Style

Adolescent Gender Differences in Weight, Activity, and Body-Size Perception

2012 ◽  
Author(s):  
Judith R. Mccalla ◽  
Katie E. Chipungu ◽  
Patrice G. Saab ◽  
Amanda J. Countryman ◽  
Erin N. Etzel ◽  
...  
Keyword(s):  
Gender Differences ◽  
Body Size ◽  
Size Perception ◽  
Body Size Perception

Maternal body size and condition determine calf growth rates in southern right whales

2018 ◽  
Vol 592 ◽  
pp. 267-281 ◽  
Author(s):  
F Christiansen ◽  
F Vivier ◽  
C Charlton ◽  
R Ward ◽  
A Amerson ◽  
...  
Keyword(s):  
Body Size ◽  
Growth Rates ◽  
Maternal Body ◽  
Calf Growth ◽  
Right Whales ◽  
Southern Right Whales

Trophic position scales positively with body size within but not among four species of rocky reef predators

2020 ◽  
Vol 640 ◽  
pp. 189-200 ◽  
Author(s):  
AM Olson ◽  
A Frid ◽  
JBQ dos Santos ◽  
F Juanes
Keyword(s):  
Body Size ◽  
Trophic Position ◽  
Stomach Contents ◽  
Rocky Reef ◽  
Morphometric Traits ◽  
Predator Species ◽  
Predatory Fishes ◽  
Average Size ◽  
Interspecific Comparisons ◽  
Large Predators

Intra- and interspecifically, larger-bodied predators generally occupy higher trophic positions (TPs). With widespread declines in large predators, there is a need to understand their size-based trophic roles to predict ecosystem-level responses. In British Columbia, Canada, we examined size-based trophic interactions between predatory fishes—3 rockfish species (genus Sebastes) and lingcod Ophiodon elongatus—and their prey, converting predator δ15N signatures to TP and analyzing stomach contents. Intraspecifically, TP scaled positively with predator length and gape width, but the rates of change varied by species. Interspecifically, TP did not scale positively with the observed mean sizes or known maximum sizes of species. Lingcod TP was lower than that of yelloweye and quillback rockfishes, which were 51 and 37%, respectively, smaller than lingcod. Yellowtail rockfish had the smallest average size, yet their mean TP did not differ significantly from that of lingcod. Neither species differences in some morphometric traits known to influence body size-TP relationships nor phylogenetic history explained these results. Most prey consumed were <20% of the predator’s size, which might partially explain the lack of a size-based trophic hierarchy among species. Currently, large size classes of rockfishes are being lost due to fisheries and perhaps climate-driven changes. Our findings on intraspecific size-TP relationships indicate that fishery removals of large individuals may diminish trophic structures. Interspecific comparisons of TP suggest that, along with size, species remain an important factor in understanding trophic dynamics. In addition, smaller-bodied predator species may have significant ecological roles to be considered in ecosystem-based fisheries management.

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