Direct observations of groups of mysids in shallow coastal waters of western Japan and southern Korea

Ohtsuka, S.; Inagaki, Haruhisa; Onbé, Takashi; Gushima, Kenji; Yoon, Young‐In

doi:10.3354/meps123033

Cited by 16 publications

(14 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is because frequent habitatswitching (i.e., behavior changing) and habitat diversity in seagrass vegetation reduces interference competition (e.g., Nelson, 1979;Peterson, 1979;Edgar, 1990). This explanation may also apply to Neomysis species with respect to frequent habitatswitching across seagrass leaves and the broader meadow ecosystem (Ohtsuka et al, 1995;Barberá-Cebrián et al, 2002;Yamada et al, 2007a). Previous studies have also suggested that mysid species may be facilitative, whereby the formation of mixed species aggregations confers benefits to each of the component species.…”

Section: Discussionmentioning

confidence: 92%

“…Habitat selection among mysid species within the three-dimensional structure of seagrass meadows has been examined at various scales. For example, aggregative behavior (e.g., schooling) and patterns of temporal and spatial migrations across seagrass patches differ among mysid species (Wittmann, 1977;O'Brien, 1988;Ohtsuka et al, 1995;Barberá-Cebrián et al, 2002;Yamada et al, 2007a). These studies support habitat partitioning among mysid species at both mesoscale (hundreds of meters) and microscale (\1 m) levels.…”

mentioning

confidence: 84%

“…Especially, it is possible that unique ecosystem traits in seagrass meadows (i.e., the existence of seagrass leaves) might greatly contribute. For example, seagrass leaves offering three-dimensional and diverse microhabitats allow the formation of a wide range of unique guilds of macrofauna (e.g., immobile species on leaves) and associated foraging matter (e.g., epiphytic microalgae on leaves) (Mauchline, 1980;Ohtsuka et al, 1995;Barberá-Cebrián et al, 2002;Yamada et al, 2007a). If such unique ecosystem traits in seagrass meadows enhance habitat partitioning, its evidence can be found in the differences of micro-and mesohabitat selection among mysid species in case of the existence of seagrass vegetation and/or the existence of foraging matter.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Importance of seagrass vegetation for habitat partitioning between closely related species, mobile macrofauna Neomysis (Misidacea)

Yamada

Kumagai

2011

Hydrobiologia

View full text Add to dashboard Cite

Seagrass meadows provide both habitats and a range of food sources for macrofaunal communities. These functions facilitate the coexistence of less mobile invertebrates (in comparison with mysids, such as amphipods) that are associated with seagrass leaves, and may also enhance the coexistence of highly mobile invertebrates such as mysid. We investigated the function of seagrass in supporting the coexistence of two mysid species, Neomysis awatschensis and N. mirabilis. These taxa are dominant in seagrass ecosystems of temperate coastal areas. We compared patterns of habitat use between the two species at mesoscales (among seagrass patches) and microscales (among seagrass leaves) by performing field surveys and laboratory experiments. The field survey results showed positive correlations in the abundance of the two mysid species, indicating that both species select similar habitats at the mesoscale level. In the laboratory experiments, the pattern of microhabitat selection (fundamental habitat) was similar for both species, even at increased densities and with the presence of an immobile habitatcompetitor (the gastropod Barleeia angustata) on the leaves. However, this pattern changed significantly when a food source (epiphytic microalgae) was present on the leaves. This result indicates that (i) inter-and intraspecific interference competition does not affect microhabitat selection in these two mysids and (ii) both Neomysis species use similar habitats at the feeding stage. Although these two closely related mysids species may have similar requirements for microhabitat and food, the evidence that they did not act as competitors is attributable to unrestricted microhabitat and food (e.g., epiphytic algae) in the presence of seagrass vegetation.

show abstract

Section: Discussionmentioning

confidence: 92%

mentioning

confidence: 84%

mentioning

confidence: 99%

See 1 more Smart Citation

Importance of seagrass vegetation for habitat partitioning between closely related species, mobile macrofauna Neomysis (Misidacea)

Yamada

Kumagai

2011

Hydrobiologia

View full text Add to dashboard Cite

show abstract

“…Heterospecific associations, reported in a range of taxa from phytoplankton to insects to dolphins (Terborgh ; Ohtsuka et al. ; Glos et al. ; Kiszka et al.…”

Section: Introductionmentioning

confidence: 99%

“…Aggregations with mixed phenotypes are unusual because individuals are not necessarily subject to the same risks of predation (Morse 1977). Heterospecific associations, reported in a range of taxa from phytoplankton to insects to dolphins (Terborgh 1990;Ohtsuka et al 1995;Glos et al 2007;Kiszka et al 2011) see also review by Stensland et al (2003), are thought to increase foraging efficiency and predator avoidance (Powell 1974;Barnard 1978;Kiszka et al 2011;Bryer et al 2013). However, these benefits and costs may not be similar for all individuals within heterospecific groups, and large deviations in colours and patterns among a few individuals within aggregations may lead to the so-called oddity effect (Tosh et al 2007;Rodgers et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Predators, Parasites and Heterospecific Aggregations in Chrysomeline Larvae

2017

View full text Add to dashboard Cite

Gregariousness is a common feature in aposematic insect prey and offers the additional benefit of enhancing the effectiveness of their toxic defences. Aggregations of the aposematic larvae of two species of leaf beetles, Paropsis atomaria and Paropsisterna variicollis, occur together on the same Eucalyptus trees over spring and summer. Conventionally, the colouration of these larvae is thought to provide aposematic protection against vertebrate predators, but supporting evidence is limited. We determine whether environmental preferences contribute to the heterospecific aggregations, and the potential costs for larvae of living in heterospecific aggregations. We surveyed natural aggregations of the larvae of both species in the field and recorded environmental variables of these aggregations. This revealed that heterospecific aggregations occurred more commonly at higher leaf temperatures, and in less visually conspicuous locations. Paropsis atomaria larvae were twice as likely to be found in heterospecific aggregations than Pa. variicollis. Next, we manipulated larval aggregations in the field to investigate the survival and gregarious behaviour of larvae in heterospecific aggregations. The gregarious behaviour of both species of larvae did not differ between heterospecific and monospecific aggregations. Further, the survival of larvae did not significantly differ between heterospecific and monospecific aggregations. We suggest that the preference for P. atomaria larvae to aggregate with Pa. variicollis at higher leaf temperature results in the observed heterospecific aggregations, with a potential benefit of lowerer parasitoidism rates for P. atomaria.

show abstract

Feeding on epibenthic zooplankton by Long‐tailed Ducks: patch structure, profitability, and food web implications

Lovvorn

Brooks

2021

Ecosphere

View full text Add to dashboard Cite

Models of the trophic needs and impacts of mobile predators in food web networks typically do not consider interactions between prey dispersion and threshold prey densities needed for profitable foraging. As a result, the biomass of predators that can be supported, or direct and indirect impacts of those predators on other food web components, may be poorly estimated. In Simpson Lagoon on the U.S. Arctic coast, epibenthic amphipods and especially mysid shrimp comprised most of the diets of fish, and of Long-tailed Ducks (Clangula hyemalis) which strongly dominated prey consumption. Based on mean prey densities and gross estimates of prey biomass consumed, earlier studies estimated that continuous immigration of mysids into the lagoon was needed to support the predators. Comparison of variances from net samples vs. different probability density functions (PDFs) around reported means indicated that prey were not normally distributed, and instead occurred in patches with a skewed and wide range of densities. We used the functional response of captive Long-tailed Ducks eating mysids, and a foraging energetics model, to identify minimum prey densities these diving ducks needed to feed profitably. Based on PDFs that assumed prey densities in all 1-m 2 cells (patches for single feeding dives on potential mysid swarms) were independent, we simulated prey grids with slightly skewed to highly skewed distributions for the reported sample means. Results showed that the greater the range of patch densities, the smaller the fraction of prey biomass that was profitably available to the ducks, thereby increasing the requisite immigration of mysids. Consumption by ectothermic predators further decreased prey available and advanced the date and increased the amount of mysid influx required. The models also showed that the birds had to seek areas with non-independent clusters of high-density feeding patches as prey declined in late summer. Thus, spatially continuous measures of patch structure over larger scales are needed to estimate the fraction of prey that is functionally available. Our study emphasizes that when estimating trophic needs and impacts of mobile endothermic predators, simple means of prey density can be misleading, owing to interactions of prey patch structure with profitability thresholds.

show abstract

Direct observations of groups of mysids in shallow coastal waters of western Japan and southern Korea

Cited by 16 publications

References 13 publications

Importance of seagrass vegetation for habitat partitioning between closely related species, mobile macrofauna Neomysis (Misidacea)

Importance of seagrass vegetation for habitat partitioning between closely related species, mobile macrofauna Neomysis (Misidacea)

Predators, Parasites and Heterospecific Aggregations in Chrysomeline Larvae

Feeding on epibenthic zooplankton by Long‐tailed Ducks: patch structure, profitability, and food web implications

Contact Info

Product

Resources

About